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linux/net/bluetooth/smp.c

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Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Introduce force_bredr_smp debugfs option for testing Testing cross-transport pairing that starts on BR/EDR is only valid when using a controller with BR/EDR Secure Connections. Devices will indicate this by providing BR/EDR SMP fixed channel over L2CAP. To allow testing of this feature on Bluetooth 4.0 controller or controllers without the BR/EDR Secure Connections features, introduce a force_bredr_smp debugfs option that allows faking the required AES connection. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-12-31 14:43:16 -08:00
Bluetooth: Remove unnecessary headers include Most of the include were unnecessary or already included by some other header. Replace module.h by export.h where possible. Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2012-05-23 04:04:22 -03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Move smp.h header file into net/bluetooth/ The smp.h header file is only used internally by the bluetooth.ko module and is not a public API. So make it local to the core Bluetooth module. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-10-10 14:54:16 -07:00
Bluetooth: Add basic support for sending our LE SC public key When the initial pairing request & response PDUs have been exchanged and both have had the LE SC bit set the next step is to generate a ECDH key pair and to send the public key to the remote side. This patch adds basic support for generating the key pair and sending the public key using the new Public Key SMP PDU. It is the initiating device that sends the public key first and the non-initiating device responds by sending its public key respectively (in a subsequent patch). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 10:50:15 +03:00
Bluetooth: Move smp.h header file into net/bluetooth/ The smp.h header file is only used internally by the bluetooth.ko module and is not a public API. So make it local to the core Bluetooth module. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-10-10 14:54:16 -07:00
Bluetooth: Add LE SMP Cryptoolbox functions This patch implements SMP crypto functions called ah, c1, s1 and e. It also implements auxiliary functions. All These functions are needed for SMP keys generation. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Anderson Lizardo <anderson.lizardo@openbossa.org> Signed-off-by: Bruna Moreira <bruna.moreira@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:44 -03:00
Bluetooth: Add debugfs support for max LE encryption key size This patch adds a debugfs control to set a different maximum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:26 +03:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Add basic support for sending our LE SC public key When the initial pairing request & response PDUs have been exchanged and both have had the LE SC bit set the next step is to generate a ECDH key pair and to send the public key to the remote side. This patch adds basic support for generating the key pair and sending the public key using the new Public Key SMP PDU. It is the initiating device that sends the public key first and the non-initiating device responds by sending its public key respectively (in a subsequent patch). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 10:50:15 +03:00
Bluetooth: Update MGMT and SMP timeout constants to use msecs_to_jiffies The MGMT and SMP timeout constants are always used in form of jiffies. So just include the conversion from msecs in the define itself. This has the advantage of making the code where the timeout is used more readable. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2012-03-01 14:32:37 -08:00
Bluetooth: Add support for SMP timeout This patch adds support for disconnecting the link when SMP procedure takes more than 30 seconds. SMP begins when either the Pairing Request command is sent or the Pairing Response is received, and it ends when the link is encrypted (or terminated). Vol 3, Part H Section 3.4. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-14 13:37:41 -03:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Make auth_req mask dependent on SC enabled or not If we haven't enabled SC support on our side we should use the same mask for the authentication requirement as we were using before SC support was added, otherwise we should use the extended mask for SC. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-26 13:29:28 +03:00
Bluetooth: SMP: Fix setting unknown auth_req bits When sending a pairing request or response we should not just blindly copy the value that the remote device sent. Instead we should at least make sure to mask out any unknown bits. This is particularly critical from the upcoming LE Secure Connections feature perspective as incorrectly indicating support for it (by copying the remote value) would cause a failure to pair with devices that support it. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Cc: stable@kernel.org Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
2012-10-11 16:26:06 +02:00
Bluetooth: Add support for sending LE SC Confirm value Once the public key exchange is complete the next step is for the non-initiating device to send a SMP Pairing Confirm PDU to the initiating device. This requires the use of a new smp_f4 confirm value generation function which in turn builds on the AES-CMAC cryptographic function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:30:08 +03:00
Bluetooth: Convert SMP flags into an enum There's no reason to have explicit values for these flags. Convert them to an enum to be consistent with other similar flags. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-16 19:25:18 +03:00
Bluetooth: Add SMP flag for SC and set it when necessary. This patch adds a new SMP flag for tracking whether Secure Connections is in use and sets the flag when both remote and local side have elected to use Secure Connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-16 11:03:34 +03:00
Bluetooth: Add handler function for receiving LE SC public key This patch adds a handler function for the LE SC SMP Public Key PDU. When we receive the key we proceed with generating the shared DHKey value from the remote public key and local private key. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:09:28 +03:00
Bluetooth: Detect SMP SC debug keys We need to be able to detect if the remote side used a debug key for the pairing. This patch adds the debug key defines and sets a flag to indicate that a debug key was used. The debug private key (debug_sk) is also added in this patch but will only be used in a subsequent patch when local debug key support is implemented. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:52:28 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Fix DHKey Check sending order for slave role According to the LE SC specification the initiating device sends its DHKey check first and the non-initiating devices sends its DHKey check as a response to this. It's also important that the non-initiating device doesn't send the response if it's still waiting for user input. In order to synchronize all this a new flag is added. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-04 11:07:40 +03:00
Bluetooth: Track local vs remote OOB data availability There are several decisions in the SMP logic that depend not only on whether we're doing SMP or not, but also whether local and/or remote OOB data is present. This patch splits the existing SMP_FLAG_OOB into two new flags to track local and remote OOB data respectively. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16 11:45:44 +02:00
Bluetooth: Convert SMP flags into an enum There's no reason to have explicit values for these flags. Convert them to an enum to be consistent with other similar flags. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-16 19:25:18 +03:00
Bluetooth: Make SMP context private to smp.c There are no users of the smp_chan struct outside of smp.c so move it away from smp.h. The addition of the l2cap.h include to hci_core.c, hci_conn.c and mgmt.c is something that should have been there already previously to avoid warnings of undeclared struct l2cap_conn, but the compiler warning was apparently shadowed away by the mention of l2cap_conn in the struct smp_chan definition. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:47 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Add function for generating LE SC out-of-band data This patch adds a smp_generate_oob function that allows to create local out-of-band data that can be used for pairing and also provides the confirmation and random value. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:22 -07:00
Bluetooth: Rename smp->local_rr into smp->local_rand The variable for the out-of-band random number was badly named and with that confusing. Just rename it to local_rand so it is clear what value it represents. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 12:34:57 -07:00
Bluetooth: Add function for generating LE SC out-of-band data This patch adds a smp_generate_oob function that allows to create local out-of-band data that can be used for pairing and also provides the confirmation and random value. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:22 -07:00
Bluetooth: Add debugfs support for min LE encryption key size This patch adds a debugfs control to set a different minimum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly (e.g. that we get appropriate 'Encryption Key Size' error responses when necessary). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:27 +03:00
Bluetooth: Add debugfs support for max LE encryption key size This patch adds a debugfs control to set a different maximum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:26 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Add support for AES-CMAC hash for security manager device The security manager device will require the use of AES-CMAC hash for out-of-band data generation. This patch makes sure it is correctly set up and available. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:21 -07:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Make SMP context private to smp.c There are no users of the smp_chan struct outside of smp.c so move it away from smp.h. The addition of the l2cap.h include to hci_core.c, hci_conn.c and mgmt.c is something that should have been there already previously to avoid warnings of undeclared struct l2cap_conn, but the compiler warning was apparently shadowed away by the mention of l2cap_conn in the struct smp_chan definition. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:47 +03:00
Bluetooth: Add SMP-internal timeout callback This patch adds an SMP-internal timeout callback to remove the depenency on (the soon to be removed) l2cap_conn->security_timer. The behavior is the same as with l2cap_conn->security_timer except that the new l2cap_conn_shutdown() public function is used instead of the L2CAP core internal l2cap_conn_del(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:40 +03:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Add SMP-internal timeout callback This patch adds an SMP-internal timeout callback to remove the depenency on (the soon to be removed) l2cap_conn->security_timer. The behavior is the same as with l2cap_conn->security_timer except that the new l2cap_conn_shutdown() public function is used instead of the L2CAP core internal l2cap_conn_del(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:40 +03:00
Bluetooth: Make SMP context private to smp.c There are no users of the smp_chan struct outside of smp.c so move it away from smp.h. The addition of the l2cap.h include to hci_core.c, hci_conn.c and mgmt.c is something that should have been there already previously to avoid warnings of undeclared struct l2cap_conn, but the compiler warning was apparently shadowed away by the mention of l2cap_conn in the struct smp_chan definition. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:47 +03:00
Bluetooth: Fix local OOB data handling for SMP We need to store the local ra/rb value in order to verify the Check value received from the remote. This patch adds a new 'lr' for the local ra/rb value and makes sure it gets used when verifying the DHKey Check PDU received from the remote. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16 11:45:43 +02:00
Bluetooth: Make SMP context private to smp.c There are no users of the smp_chan struct outside of smp.c so move it away from smp.h. The addition of the l2cap.h include to hci_core.c, hci_conn.c and mgmt.c is something that should have been there already previously to avoid warnings of undeclared struct l2cap_conn, but the compiler warning was apparently shadowed away by the mention of l2cap_conn in the struct smp_chan definition. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:47 +03:00
Bluetooth: Add support for LE SC key generation As the last step of the LE SC pairing process it's time to generate and distribute keys. The generation part is unique to LE SC and so this patch adds a dedicated function for it. We also clear the distribution bits for keys which are not distributed with LE SC, so that the code shared with legacy SMP will not go ahead and try to distribute them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:54:04 +03:00
Bluetooth: Rename smp->smp_flags to smp->flags There's no reason to have "smp" in this variable name since it is already part of the SMP struct which provides sufficient context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:50 +03:00
Bluetooth: Track authentication method in SMP context For Secure Connections we'll select the authentication method as soon as we receive the public key, but only use it later (both when actually triggering the method as well as when determining the quality of the resulting LTK). Store the method therefore in the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:48:26 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Add dedicated AES instance for each SMP context Many places have to be extra careful to not hold the hdev lock when calling into the SMP code. This is because the SMP crypto functions use the crypto handle that's part of the hci_dev struct. Giving the SMP context its own handle helps simplifying the locking logic and removes the risk for deadlocks. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-27 14:23:03 +03:00
Bluetooth: Add basic support for sending our LE SC public key When the initial pairing request & response PDUs have been exchanged and both have had the LE SC bit set the next step is to generate a ECDH key pair and to send the public key to the remote side. This patch adds basic support for generating the key pair and sending the public key using the new Public Key SMP PDU. It is the initiating device that sends the public key first and the non-initiating device responds by sending its public key respectively (in a subsequent patch). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 10:50:15 +03:00
Bluetooth: Add handler function for receiving LE SC public key This patch adds a handler function for the LE SC SMP Public Key PDU. When we receive the key we proceed with generating the shared DHKey value from the remote public key and local private key. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:09:28 +03:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Add basic support for sending our LE SC public key When the initial pairing request & response PDUs have been exchanged and both have had the LE SC bit set the next step is to generate a ECDH key pair and to send the public key to the remote side. This patch adds basic support for generating the key pair and sending the public key using the new Public Key SMP PDU. It is the initiating device that sends the public key first and the non-initiating device responds by sending its public key respectively (in a subsequent patch). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 10:50:15 +03:00
Bluetooth: Add dedicated AES instance for each SMP context Many places have to be extra careful to not hold the hdev lock when calling into the SMP code. This is because the SMP crypto functions use the crypto handle that's part of the hci_dev struct. Giving the SMP context its own handle helps simplifying the locking logic and removes the risk for deadlocks. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-27 14:23:03 +03:00
Bluetooth: Add basic support for AES-CMAC Most of the LE Secure Connections SMP crypto functions build on top of the AES-CMAC function. This patch adds access to AES-CMAC in the kernel crypto subsystem by allocating a crypto_hash handle for it in a similar way that we have one for AES-CBC. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-02 14:19:47 +03:00
Bluetooth: Make SMP context private to smp.c There are no users of the smp_chan struct outside of smp.c so move it away from smp.h. The addition of the l2cap.h include to hci_core.c, hci_conn.c and mgmt.c is something that should have been there already previously to avoid warnings of undeclared struct l2cap_conn, but the compiler warning was apparently shadowed away by the mention of l2cap_conn in the struct smp_chan definition. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:47 +03:00
Bluetooth: Detect SMP SC debug keys We need to be able to detect if the remote side used a debug key for the pairing. This patch adds the debug key defines and sets a flag to indicate that a debug key was used. The debug private key (debug_sk) is also added in this patch but will only be used in a subsequent patch when local debug key support is implemented. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:52:28 +03:00
Bluetooth: Add flexible buffer byte order swapping function Since the SMP code needs to swap ordering of variable length buffers add a convenience function that can be used for any length buffer. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-16 19:25:19 +03:00
Bluetooth: Add LE SMP Cryptoolbox functions This patch implements SMP crypto functions called ah, c1, s1 and e. It also implements auxiliary functions. All These functions are needed for SMP keys generation. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Anderson Lizardo <anderson.lizardo@openbossa.org> Signed-off-by: Bruna Moreira <bruna.moreira@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:44 -03:00
Bluetooth: Add flexible buffer byte order swapping function Since the SMP code needs to swap ordering of variable length buffers add a convenience function that can be used for any length buffer. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-16 19:25:19 +03:00
Bluetooth: Add LE SMP Cryptoolbox functions This patch implements SMP crypto functions called ah, c1, s1 and e. It also implements auxiliary functions. All These functions are needed for SMP keys generation. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Anderson Lizardo <anderson.lizardo@openbossa.org> Signed-off-by: Bruna Moreira <bruna.moreira@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:44 -03:00
Bluetooth: Add flexible buffer byte order swapping function Since the SMP code needs to swap ordering of variable length buffers add a convenience function that can be used for any length buffer. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-16 19:25:19 +03:00
Bluetooth: Add LE SMP Cryptoolbox functions This patch implements SMP crypto functions called ah, c1, s1 and e. It also implements auxiliary functions. All These functions are needed for SMP keys generation. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Anderson Lizardo <anderson.lizardo@openbossa.org> Signed-off-by: Bruna Moreira <bruna.moreira@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:44 -03:00
Bluetooth: Organize SMP crypto functions to logical sections This patch organizes the various SMP crypto functions so that the LE SC functions appear in one section and the legacy SMP functions in a separate one. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-02 13:39:23 +02:00
Bluetooth: Add support for sending LE SC Confirm value Once the public key exchange is complete the next step is for the non-initiating device to send a SMP Pairing Confirm PDU to the initiating device. This requires the use of a new smp_f4 confirm value generation function which in turn builds on the AES-CMAC cryptographic function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:30:08 +03:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Add support for sending LE SC Confirm value Once the public key exchange is complete the next step is for the non-initiating device to send a SMP Pairing Confirm PDU to the initiating device. This requires the use of a new smp_f4 confirm value generation function which in turn builds on the AES-CMAC cryptographic function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:30:08 +03:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Add support for sending LE SC Confirm value Once the public key exchange is complete the next step is for the non-initiating device to send a SMP Pairing Confirm PDU to the initiating device. This requires the use of a new smp_f4 confirm value generation function which in turn builds on the AES-CMAC cryptographic function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:30:08 +03:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Add support for sending LE SC Confirm value Once the public key exchange is complete the next step is for the non-initiating device to send a SMP Pairing Confirm PDU to the initiating device. This requires the use of a new smp_f4 confirm value generation function which in turn builds on the AES-CMAC cryptographic function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:30:08 +03:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Add support for sending LE SC Confirm value Once the public key exchange is complete the next step is for the non-initiating device to send a SMP Pairing Confirm PDU to the initiating device. This requires the use of a new smp_f4 confirm value generation function which in turn builds on the AES-CMAC cryptographic function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:30:08 +03:00
Bluetooth: Fix const declarations for smp_f5 and smp_f6 These SMP crypto functions should have all their input parameters declared as const. This patch fixes the parameters that were missing the const declaration. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-29 12:04:10 +02:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Fix const declarations for smp_f5 and smp_f6 These SMP crypto functions should have all their input parameters declared as const. This patch fixes the parameters that were missing the const declaration. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-29 12:04:10 +02:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Fix for a leftover debug of pairing credentials One of the LE Secure Connections security credentials was still using the BT_DBG instead of SMP_DBG. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-12-31 20:01:22 -08:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Add support for LE SC numeric comparison After the Pairing Confirm and Random PDUs have been exchanged in LE SC it's time to generate a numeric comparison value using a new smp_g2 cryptographic function (which also builds on AES-CMAC). This patch adds the smp_g2 implementation and updates the Pairing Random PDU handler to proceed with the value genration and user confirmation. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:39:49 +03:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Add support for LE SC numeric comparison After the Pairing Confirm and Random PDUs have been exchanged in LE SC it's time to generate a numeric comparison value using a new smp_g2 cryptographic function (which also builds on AES-CMAC). This patch adds the smp_g2 implementation and updates the Pairing Random PDU handler to proceed with the value genration and user confirmation. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:39:49 +03:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Add support for LE SC numeric comparison After the Pairing Confirm and Random PDUs have been exchanged in LE SC it's time to generate a numeric comparison value using a new smp_g2 cryptographic function (which also builds on AES-CMAC). This patch adds the smp_g2 implementation and updates the Pairing Random PDU handler to proceed with the value genration and user confirmation. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:39:49 +03:00
Bluetooth: Organize SMP crypto functions to logical sections This patch organizes the various SMP crypto functions so that the LE SC functions appear in one section and the legacy SMP functions in a separate one. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-02 13:39:23 +02:00
Bluetooth: Add LE SMP Cryptoolbox functions This patch implements SMP crypto functions called ah, c1, s1 and e. It also implements auxiliary functions. All These functions are needed for SMP keys generation. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Anderson Lizardo <anderson.lizardo@openbossa.org> Signed-off-by: Bruna Moreira <bruna.moreira@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:44 -03:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Remove dead code from SMP encryption function The AES cipher is used in ECB mode by SMP and therefore doesn't use an IV (crypto_blkcipher_ivsize returns 0) so the code trying to set the IV was never getting called. Simply remove this code to avoid anyone from thinking it actually makes some difference. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-02 10:49:04 +02:00
Bluetooth: Add LE SMP Cryptoolbox functions This patch implements SMP crypto functions called ah, c1, s1 and e. It also implements auxiliary functions. All These functions are needed for SMP keys generation. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Anderson Lizardo <anderson.lizardo@openbossa.org> Signed-off-by: Bruna Moreira <bruna.moreira@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:44 -03:00
Bluetooth: Add debug logs for legacy SMP crypto functions To help debug legacy SMP crypto functions add debug logs of the various values involved. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-05-19 21:06:04 +03:00
Bluetooth: Fix minor coding style issue in smp.c The convention for checking for NULL pointers is !ptr and not ptr == NULL. This patch fixes such an occurrence in smp.c. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-03 16:07:13 +02:00
Bluetooth: Add LE SMP Cryptoolbox functions This patch implements SMP crypto functions called ah, c1, s1 and e. It also implements auxiliary functions. All These functions are needed for SMP keys generation. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Anderson Lizardo <anderson.lizardo@openbossa.org> Signed-off-by: Bruna Moreira <bruna.moreira@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:44 -03:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add flexible buffer byte order swapping function Since the SMP code needs to swap ordering of variable length buffers add a convenience function that can be used for any length buffer. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-16 19:25:19 +03:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add LE SMP Cryptoolbox functions This patch implements SMP crypto functions called ah, c1, s1 and e. It also implements auxiliary functions. All These functions are needed for SMP keys generation. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Anderson Lizardo <anderson.lizardo@openbossa.org> Signed-off-by: Bruna Moreira <bruna.moreira@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:44 -03:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add flexible buffer byte order swapping function Since the SMP code needs to swap ordering of variable length buffers add a convenience function that can be used for any length buffer. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-16 19:25:19 +03:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add LE SMP Cryptoolbox functions This patch implements SMP crypto functions called ah, c1, s1 and e. It also implements auxiliary functions. All These functions are needed for SMP keys generation. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Anderson Lizardo <anderson.lizardo@openbossa.org> Signed-off-by: Bruna Moreira <bruna.moreira@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:44 -03:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add flexible buffer byte order swapping function Since the SMP code needs to swap ordering of variable length buffers add a convenience function that can be used for any length buffer. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-16 19:25:19 +03:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add debug logs for legacy SMP crypto functions To help debug legacy SMP crypto functions add debug logs of the various values involved. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-05-19 21:06:04 +03:00
Bluetooth: Add LE SMP Cryptoolbox functions This patch implements SMP crypto functions called ah, c1, s1 and e. It also implements auxiliary functions. All These functions are needed for SMP keys generation. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Anderson Lizardo <anderson.lizardo@openbossa.org> Signed-off-by: Bruna Moreira <bruna.moreira@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:44 -03:00
Bluetooth: Organize SMP crypto functions to logical sections This patch organizes the various SMP crypto functions so that the LE SC functions appear in one section and the legacy SMP functions in a separate one. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-02 13:39:23 +02:00
Bluetooth: Add debug logs for legacy SMP crypto functions To help debug legacy SMP crypto functions add debug logs of the various values involved. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-05-19 21:06:04 +03:00
Bluetooth: Organize SMP crypto functions to logical sections This patch organizes the various SMP crypto functions so that the LE SC functions appear in one section and the legacy SMP functions in a separate one. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-02 13:39:23 +02:00
Bluetooth: Add debug logs for legacy SMP crypto functions To help debug legacy SMP crypto functions add debug logs of the various values involved. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-05-19 21:06:04 +03:00
Bluetooth: Organize SMP crypto functions to logical sections This patch organizes the various SMP crypto functions so that the LE SC functions appear in one section and the legacy SMP functions in a separate one. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-02 13:39:23 +02:00
Bluetooth: Add debug logs for legacy SMP crypto functions To help debug legacy SMP crypto functions add debug logs of the various values involved. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-05-19 21:06:04 +03:00
Bluetooth: Organize SMP crypto functions to logical sections This patch organizes the various SMP crypto functions so that the LE SC functions appear in one section and the legacy SMP functions in a separate one. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-02 13:39:23 +02:00
Bluetooth: Add support for LE SC key generation As the last step of the LE SC pairing process it's time to generate and distribute keys. The generation part is unique to LE SC and so this patch adds a dedicated function for it. We also clear the distribution bits for keys which are not distributed with LE SC, so that the code shared with legacy SMP will not go ahead and try to distribute them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:54:04 +03:00
Bluetooth: Organize SMP crypto functions to logical sections This patch organizes the various SMP crypto functions so that the LE SC functions appear in one section and the legacy SMP functions in a separate one. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-02 13:39:23 +02:00
Bluetooth: Add support for LE SC key generation As the last step of the LE SC pairing process it's time to generate and distribute keys. The generation part is unique to LE SC and so this patch adds a dedicated function for it. We also clear the distribution bits for keys which are not distributed with LE SC, so that the code shared with legacy SMP will not go ahead and try to distribute them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:54:04 +03:00
Bluetooth: Organize SMP crypto functions to logical sections This patch organizes the various SMP crypto functions so that the LE SC functions appear in one section and the legacy SMP functions in a separate one. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-02 13:39:23 +02:00
Bluetooth: Add support for LE SC key generation As the last step of the LE SC pairing process it's time to generate and distribute keys. The generation part is unique to LE SC and so this patch adds a dedicated function for it. We also clear the distribution bits for keys which are not distributed with LE SC, so that the code shared with legacy SMP will not go ahead and try to distribute them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:54:04 +03:00
Bluetooth: Organize SMP crypto functions to logical sections This patch organizes the various SMP crypto functions so that the LE SC functions appear in one section and the legacy SMP functions in a separate one. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-02 13:39:23 +02:00
Bluetooth: Add support for LE SC key generation As the last step of the LE SC pairing process it's time to generate and distribute keys. The generation part is unique to LE SC and so this patch adds a dedicated function for it. We also clear the distribution bits for keys which are not distributed with LE SC, so that the code shared with legacy SMP will not go ahead and try to distribute them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:54:04 +03:00
Bluetooth: Fix missing const declarations in SMP functions Several SMP functions take read-only data. This patch fixes the declaration of these parameters to use the const specifier as appropriate. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-02 13:37:41 +02:00
Bluetooth: Add smp_irk_matches helper function This patch adds a helper function to check whether a given IRK matches a given Resolvable Private Address (RPA). The function will be needed for implementing the rest of address resolving support. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:31 +02:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add smp_irk_matches helper function This patch adds a helper function to check whether a given IRK matches a given Resolvable Private Address (RPA). The function will be needed for implementing the rest of address resolving support. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:31 +02:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add smp_irk_matches helper function This patch adds a helper function to check whether a given IRK matches a given Resolvable Private Address (RPA). The function will be needed for implementing the rest of address resolving support. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:31 +02:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add smp_irk_matches helper function This patch adds a helper function to check whether a given IRK matches a given Resolvable Private Address (RPA). The function will be needed for implementing the rest of address resolving support. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:31 +02:00
Bluetooth: Fix typo in smp_ah comment for hash function Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-09-04 17:08:18 +02:00
Bluetooth: Add smp_irk_matches helper function This patch adds a helper function to check whether a given IRK matches a given Resolvable Private Address (RPA). The function will be needed for implementing the rest of address resolving support. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:31 +02:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add smp_irk_matches helper function This patch adds a helper function to check whether a given IRK matches a given Resolvable Private Address (RPA). The function will be needed for implementing the rest of address resolving support. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:31 +02:00
Bluetooth: Fix missing const declarations in SMP functions Several SMP functions take read-only data. This patch fixes the declaration of these parameters to use the const specifier as appropriate. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-02 13:37:41 +02:00
Bluetooth: Add smp_irk_matches helper function This patch adds a helper function to check whether a given IRK matches a given Resolvable Private Address (RPA). The function will be needed for implementing the rest of address resolving support. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:31 +02:00
Bluetooth: Make AES crypto context private to SMP Now that we have per-adapter SMP data thanks to the root SMP L2CAP channel we can take advantage of it and attach the AES crypto context (only used for SMP) to it. This means that the smp_irk_matches() and smp_generate_rpa() function can be converted to internally handle the AES context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:17 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Add smp_irk_matches helper function This patch adds a helper function to check whether a given IRK matches a given Resolvable Private Address (RPA). The function will be needed for implementing the rest of address resolving support. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:31 +02:00
Bluetooth: Make AES crypto context private to SMP Now that we have per-adapter SMP data thanks to the root SMP L2CAP channel we can take advantage of it and attach the AES crypto context (only used for SMP) to it. This means that the smp_irk_matches() and smp_generate_rpa() function can be converted to internally handle the AES context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:17 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Make AES crypto context private to SMP Now that we have per-adapter SMP data thanks to the root SMP L2CAP channel we can take advantage of it and attach the AES crypto context (only used for SMP) to it. This means that the smp_irk_matches() and smp_generate_rpa() function can be converted to internally handle the AES context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:17 +03:00
Bluetooth: Add smp_irk_matches helper function This patch adds a helper function to check whether a given IRK matches a given Resolvable Private Address (RPA). The function will be needed for implementing the rest of address resolving support. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:31 +02:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Add smp_irk_matches helper function This patch adds a helper function to check whether a given IRK matches a given Resolvable Private Address (RPA). The function will be needed for implementing the rest of address resolving support. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:31 +02:00
Bluetooth: Fix missing const declarations in SMP functions Several SMP functions take read-only data. This patch fixes the declaration of these parameters to use the const specifier as appropriate. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-02 13:37:41 +02:00
Bluetooth: Add SMP function for generating RPAs We need a function in smp.c to generate Resolvable Random Addresses in order to support privacy. The local RPA will need to be generated before advertising, scanning or connecting and regenerated at periodic intervals. This patch adds the necessary function for RPA generation. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-23 19:42:19 +02:00
Bluetooth: Make AES crypto context private to SMP Now that we have per-adapter SMP data thanks to the root SMP L2CAP channel we can take advantage of it and attach the AES crypto context (only used for SMP) to it. This means that the smp_irk_matches() and smp_generate_rpa() function can be converted to internally handle the AES context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:17 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Add SMP function for generating RPAs We need a function in smp.c to generate Resolvable Random Addresses in order to support privacy. The local RPA will need to be generated before advertising, scanning or connecting and regenerated at periodic intervals. This patch adds the necessary function for RPA generation. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-23 19:42:19 +02:00
Bluetooth: Make AES crypto context private to SMP Now that we have per-adapter SMP data thanks to the root SMP L2CAP channel we can take advantage of it and attach the AES crypto context (only used for SMP) to it. This means that the smp_irk_matches() and smp_generate_rpa() function can be converted to internally handle the AES context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:17 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Make AES crypto context private to SMP Now that we have per-adapter SMP data thanks to the root SMP L2CAP channel we can take advantage of it and attach the AES crypto context (only used for SMP) to it. This means that the smp_irk_matches() and smp_generate_rpa() function can be converted to internally handle the AES context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:17 +03:00
Bluetooth: Add SMP function for generating RPAs We need a function in smp.c to generate Resolvable Random Addresses in order to support privacy. The local RPA will need to be generated before advertising, scanning or connecting and regenerated at periodic intervals. This patch adds the necessary function for RPA generation. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-23 19:42:19 +02:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Add SMP function for generating RPAs We need a function in smp.c to generate Resolvable Random Addresses in order to support privacy. The local RPA will need to be generated before advertising, scanning or connecting and regenerated at periodic intervals. This patch adds the necessary function for RPA generation. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-23 19:42:19 +02:00
Bluetooth: Add function for generating LE SC out-of-band data This patch adds a smp_generate_oob function that allows to create local out-of-band data that can be used for pairing and also provides the confirmation and random value. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:22 -07:00
Bluetooth: Rename smp->local_rr into smp->local_rand The variable for the out-of-band random number was badly named and with that confusing. Just rename it to local_rand so it is clear what value it represents. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 12:34:57 -07:00
Bluetooth: Add function for generating LE SC out-of-band data This patch adds a smp_generate_oob function that allows to create local out-of-band data that can be used for pairing and also provides the confirmation and random value. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:22 -07:00
Bluetooth: Rename smp->local_rr into smp->local_rand The variable for the out-of-band random number was badly named and with that confusing. Just rename it to local_rand so it is clear what value it represents. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 12:34:57 -07:00
Bluetooth: Add function for generating LE SC out-of-band data This patch adds a smp_generate_oob function that allows to create local out-of-band data that can be used for pairing and also provides the confirmation and random value. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:22 -07:00
Bluetooth: Rename smp->local_rr into smp->local_rand The variable for the out-of-band random number was badly named and with that confusing. Just rename it to local_rand so it is clear what value it represents. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 12:34:57 -07:00
Bluetooth: Add function for generating LE SC out-of-band data This patch adds a smp_generate_oob function that allows to create local out-of-band data that can be used for pairing and also provides the confirmation and random value. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:22 -07:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Add SMP-internal timeout callback This patch adds an SMP-internal timeout callback to remove the depenency on (the soon to be removed) l2cap_conn->security_timer. The behavior is the same as with l2cap_conn->security_timer except that the new l2cap_conn_shutdown() public function is used instead of the L2CAP core internal l2cap_conn_del(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:40 +03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
first fruits - kill l2cap ->memcpy_fromiovec() Just use copy_from_iter(). That's what this method is trying to do in all cases, in a very convoluted fashion. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-24 17:07:38 -05:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Reset the security timer when a command is queued Each time a SMP command is enqueued, we reset the SMP timer, this way we follow exactly what the spec mandates: "The Security Manager Timer shall be reset when an L2CAP SMP command is queued for transmission." Vol. 3, Part H, Section 3.4 Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-19 21:06:50 -03:00
Bluetooth: Add SMP-internal timeout callback This patch adds an SMP-internal timeout callback to remove the depenency on (the soon to be removed) l2cap_conn->security_timer. The behavior is the same as with l2cap_conn->security_timer except that the new l2cap_conn_shutdown() public function is used instead of the L2CAP core internal l2cap_conn_del(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:40 +03:00
Bluetooth: Remove unnecessary checks after canceling SMP security timer The SMP security timer used to be able to modify the SMP context state but now days it simply calls hci_disconnect(). It is therefore unnecessary to have extra sanity checks for the SMP context after canceling the timer. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:48 +03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Update SMP security level to/from auth_req for SC This patch updates the functions which map the SMP authentication request to a security level and vice-versa to take into account the Secure Connections feature. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-16 10:59:06 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Update SMP security level to/from auth_req for SC This patch updates the functions which map the SMP authentication request to a security level and vice-versa to take into account the Secure Connections feature. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-16 10:59:06 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Update SMP security level to/from auth_req for SC This patch updates the functions which map the SMP authentication request to a security level and vice-versa to take into account the Secure Connections feature. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-16 10:59:06 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Update SMP security level to/from auth_req for SC This patch updates the functions which map the SMP authentication request to a security level and vice-versa to take into account the Secure Connections feature. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-16 10:59:06 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Add support for building pairing commands Before we are able to do a proper exchange of pairing parameters, we need a unified way of building pairing requests and responses. For IO Capability we use the value that was set by userspace, using the management interface. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:52 -03:00
Bluetooth: Fix coding style violations in SMP handling The SMP source code has a few coding style violations. Fix them up all at once. No actual code has changed. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-10-13 05:43:25 -07:00
Bluetooth: Add support for building pairing commands Before we are able to do a proper exchange of pairing parameters, we need a unified way of building pairing requests and responses. For IO Capability we use the value that was set by userspace, using the management interface. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:52 -03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Set SMP OOB flag if OOB data is available If we have OOB data available for the remote device in question we should set the OOB flag appropriately in the SMP pairing request or response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-26 21:19:10 +01:00
Bluetooth: Fix SM pairing parameters negotiation Before implementing SM key distribution, the pairing features exchange must be better negotiated, taking into account some features of the host and connection requirements. If we are in the "not pairable" state, it makes no sense to exchange any key. This allows for simplification of the key negociation method. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:38 -03:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Add support for handling signature resolving keys The connection signature resolving key (CSRK) is used for attribute protocol signed write procedures. This change generates a new local key during pairing and requests the peer key as well. Newly generated key and received key will be provided to userspace using the New Signature Resolving Key management event. The Master CSRK can be used for verification of remote signed write PDUs and the Slave CSRK can be used for sending signed write PDUs to the remote device. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-09 12:19:17 -07:00
Bluetooth: Fix SM pairing parameters negotiation Before implementing SM key distribution, the pairing features exchange must be better negotiated, taking into account some features of the host and connection requirements. If we are in the "not pairable" state, it makes no sense to exchange any key. This allows for simplification of the key negociation method. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:38 -03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Fix SM pairing parameters negotiation Before implementing SM key distribution, the pairing features exchange must be better negotiated, taking into account some features of the host and connection requirements. If we are in the "not pairable" state, it makes no sense to exchange any key. This allows for simplification of the key negociation method. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:38 -03:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Add initial code for distributing local IRK This code adds a HCI_PRIVACY flag to track whether Privacy support is enabled (meaning we have a local IRK) and makes sure the IRK is distributed during SMP key distribution in case this flag is set. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-22 19:06:32 +02:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Set SMP OOB flag if OOB data is available If we have OOB data available for the remote device in question we should set the OOB flag appropriately in the SMP pairing request or response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-26 21:19:10 +01:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Set link key generation bit if necessary for LE SC Depending on whether Secure Connections is enabled or not we may need to add the link key generation bit to the key distribution. This patch does the necessary modifications to the build_pairing_cmd() function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 10:39:56 +03:00
Bluetooth: Set SMP OOB flag if OOB data is available If we have OOB data available for the remote device in question we should set the OOB flag appropriately in the SMP pairing request or response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-26 21:19:10 +01:00
Bluetooth: Fix OOB data present value for SMP pairing Before setting the OOB data present flag with SMP pairing, check the newly introduced present tracking that actual OOB data values have been provided. The existence of remote OOB data structure does not actually mean that the correct data values are available. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-01-31 00:15:52 -08:00
Bluetooth: Track local vs remote OOB data availability There are several decisions in the SMP logic that depend not only on whether we're doing SMP or not, but also whether local and/or remote OOB data is present. This patch splits the existing SMP_FLAG_OOB into two new flags to track local and remote OOB data respectively. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16 11:45:44 +02:00
Bluetooth: Set SMP OOB flag if OOB data is available If we have OOB data available for the remote device in question we should set the OOB flag appropriately in the SMP pairing request or response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-26 21:19:10 +01:00
Bluetooth: Add basic LE SC OOB support for remote OOB data This patch adds basic OOB pairing support when we've received the remote OOB data. This includes tracking the remote r value (in smp->rr) as well as doing the appropriate f4() call when needed. Previously the OOB rand would have been stored in smp->rrnd however these are actually two independent values so we need separate variables for them. Na/Nb in the spec maps to smp->prnd/rrnd and ra/rb maps to smp->rr with smp->pr to come once local OOB data is supported. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-28 15:17:05 +01:00
Bluetooth: Set SMP OOB flag if OOB data is available If we have OOB data available for the remote device in question we should set the OOB flag appropriately in the SMP pairing request or response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-26 21:19:10 +01:00
Bluetooth: Add extra SMP_DBG statement for remote OOB data Just for pure debugging purposes print the remote out-of-band data that has been received and is going to be used. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 12:34:56 -07:00
Bluetooth: Set SMP OOB flag if OOB data is available If we have OOB data available for the remote device in question we should set the OOB flag appropriately in the SMP pairing request or response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-26 21:19:10 +01:00
Bluetooth: Set link key generation bit if necessary for LE SC Depending on whether Secure Connections is enabled or not we may need to add the link key generation bit to the key distribution. This patch does the necessary modifications to the build_pairing_cmd() function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 10:39:56 +03:00
Bluetooth: Fix SM pairing parameters negotiation Before implementing SM key distribution, the pairing features exchange must be better negotiated, taking into account some features of the host and connection requirements. If we are in the "not pairable" state, it makes no sense to exchange any key. This allows for simplification of the key negociation method. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:38 -03:00
Bluetooth: Set SMP OOB flag if OOB data is available If we have OOB data available for the remote device in question we should set the OOB flag appropriately in the SMP pairing request or response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-26 21:19:10 +01:00
Bluetooth: Add debugfs support for max LE encryption key size This patch adds a debugfs control to set a different maximum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:26 +03:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Make auth_req mask dependent on SC enabled or not If we haven't enabled SC support on our side we should use the same mask for the authentication requirement as we were using before SC support was added, otherwise we should use the extended mask for SC. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-26 13:29:28 +03:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Fix SM pairing parameters negotiation Before implementing SM key distribution, the pairing features exchange must be better negotiated, taking into account some features of the host and connection requirements. If we are in the "not pairable" state, it makes no sense to exchange any key. This allows for simplification of the key negociation method. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:38 -03:00
Bluetooth: Set SMP OOB flag if OOB data is available If we have OOB data available for the remote device in question we should set the OOB flag appropriately in the SMP pairing request or response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-26 21:19:10 +01:00
Bluetooth: Add debugfs support for max LE encryption key size This patch adds a debugfs control to set a different maximum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:26 +03:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Make auth_req mask dependent on SC enabled or not If we haven't enabled SC support on our side we should use the same mask for the authentication requirement as we were using before SC support was added, otherwise we should use the extended mask for SC. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-26 13:29:28 +03:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Add support for building pairing commands Before we are able to do a proper exchange of pairing parameters, we need a unified way of building pairing requests and responses. For IO Capability we use the value that was set by userspace, using the management interface. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:52 -03:00
Bluetooth: Add key size checks for SMP This patch implements a check in smp cmd pairing request and pairing response to verify if encryption key maximum size is compatible in both slave and master when SMP Pairing is requested. Keys are also masked to the correct negotiated size. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-14 13:37:42 -03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Add debugfs support for max LE encryption key size This patch adds a debugfs control to set a different maximum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:26 +03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Move SMP fields to a separate structure The objective is to make the core to have as little as possible information about SMP procedures and logic. Now, all the SMP specific information is hidden from the core. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:30 -03:00
Bluetooth: Add debugfs support for max LE encryption key size This patch adds a debugfs control to set a different maximum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:26 +03:00
Bluetooth: Add key size checks for SMP This patch implements a check in smp cmd pairing request and pairing response to verify if encryption key maximum size is compatible in both slave and master when SMP Pairing is requested. Keys are also masked to the correct negotiated size. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-14 13:37:42 -03:00
Bluetooth: Rename smp_key_size to enc_key_size This makes clear that this is the size of the key used to encrypt the link. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2012-01-30 19:29:12 -03:00
Bluetooth: Add key size checks for SMP This patch implements a check in smp cmd pairing request and pairing response to verify if encryption key maximum size is compatible in both slave and master when SMP Pairing is requested. Keys are also masked to the correct negotiated size. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-14 13:37:42 -03:00
Bluetooth: Make smp_chan_destroy() private to smp.c There are no external users of smp_chan_destroy() so make it private to smp.c. The patch also moves the function higher up in the c-file in order to avoid forward declarations. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:44 +03:00
Bluetooth: Fix SMP debug key handling We need to keep debug keys around at least until the point that they are used - otherwise e.g. slave role behavior wouldn't work as there'd be no key to be looked up. The correct behavior should therefore be to return any stored keys but when we clean up the SMP context to remove the key from the hdev list if keeping debug keys around hasn't been requestsed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-03 12:43:39 +02:00
Bluetooth: Make smp_chan_destroy() private to smp.c There are no external users of smp_chan_destroy() so make it private to smp.c. The patch also moves the function higher up in the c-file in order to avoid forward declarations. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:44 +03:00
Bluetooth: Fix SMP debug key handling We need to keep debug keys around at least until the point that they are used - otherwise e.g. slave role behavior wouldn't work as there'd be no key to be looked up. The correct behavior should therefore be to return any stored keys but when we clean up the SMP context to remove the key from the hdev list if keeping debug keys around hasn't been requestsed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-03 12:43:39 +02:00
Bluetooth: Make smp_chan_destroy() private to smp.c There are no external users of smp_chan_destroy() so make it private to smp.c. The patch also moves the function higher up in the c-file in order to avoid forward declarations. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:44 +03:00
Bluetooth: Use kzfree instead of kfree in security manager Within the security manager, it makes sense to use kzfree instead of kfree for all data structures. This ensures that no key material leaks by accident. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:18 -07:00
Bluetooth: Make smp_chan_destroy() private to smp.c There are no external users of smp_chan_destroy() so make it private to smp.c. The patch also moves the function higher up in the c-file in order to avoid forward declarations. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:44 +03:00
Bluetooth: Add basic support for AES-CMAC Most of the LE Secure Connections SMP crypto functions build on top of the AES-CMAC function. This patch adds access to AES-CMAC in the kernel crypto subsystem by allocating a crypto_hash handle for it in a similar way that we have one for AES-CBC. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-02 14:19:47 +03:00
Bluetooth: Make smp_chan_destroy() private to smp.c There are no external users of smp_chan_destroy() so make it private to smp.c. The patch also moves the function higher up in the c-file in order to avoid forward declarations. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:44 +03:00
Bluetooth: Fix SMP debug key handling We need to keep debug keys around at least until the point that they are used - otherwise e.g. slave role behavior wouldn't work as there'd be no key to be looked up. The correct behavior should therefore be to return any stored keys but when we clean up the SMP context to remove the key from the hdev list if keeping debug keys around hasn't been requestsed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-03 12:43:39 +02:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Fix SMP debug key handling We need to keep debug keys around at least until the point that they are used - otherwise e.g. slave role behavior wouldn't work as there'd be no key to be looked up. The correct behavior should therefore be to return any stored keys but when we clean up the SMP context to remove the key from the hdev list if keeping debug keys around hasn't been requestsed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-03 12:43:39 +02:00
Bluetooth: Make smp_chan_destroy() private to smp.c There are no external users of smp_chan_destroy() so make it private to smp.c. The patch also moves the function higher up in the c-file in order to avoid forward declarations. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:44 +03:00
Bluetooth: Convert LTK list to RCU This patch set converts the hdev->long_term_keys list to use RCU to eliminate the need to use hci_dev_lock/unlock. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-11-13 14:37:47 +02:00
Bluetooth: Make smp_chan_destroy() private to smp.c There are no external users of smp_chan_destroy() so make it private to smp.c. The patch also moves the function higher up in the c-file in order to avoid forward declarations. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:44 +03:00
Bluetooth: Convert LTK list to RCU This patch set converts the hdev->long_term_keys list to use RCU to eliminate the need to use hci_dev_lock/unlock. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-11-13 14:37:47 +02:00
Bluetooth: Make smp_chan_destroy() private to smp.c There are no external users of smp_chan_destroy() so make it private to smp.c. The patch also moves the function higher up in the c-file in order to avoid forward declarations. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:44 +03:00
Bluetooth: Convert IRK list to RCU This patch set converts the hdev->identity_resolving_keys list to use RCU to eliminate the need to use hci_dev_lock/unlock. An additional change that must be done is to remove use of CRYPTO_ALG_ASYNC for the hdev-specific AES crypto context. The reason is that this context is used for matching RPAs and the loop that does the matching is under the RCU read lock, i.e. is an atomic section which cannot sleep. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-11-13 14:37:48 +02:00
Bluetooth: Make smp_chan_destroy() private to smp.c There are no external users of smp_chan_destroy() so make it private to smp.c. The patch also moves the function higher up in the c-file in order to avoid forward declarations. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:44 +03:00
Bluetooth: Use kzfree instead of kfree in security manager Within the security manager, it makes sense to use kzfree instead of kfree for all data structures. This ensures that no key material leaks by accident. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:18 -07:00
Bluetooth: Fix SMP debug key handling We need to keep debug keys around at least until the point that they are used - otherwise e.g. slave role behavior wouldn't work as there'd be no key to be looked up. The correct behavior should therefore be to return any stored keys but when we clean up the SMP context to remove the key from the hdev list if keeping debug keys around hasn't been requestsed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-03 12:43:39 +02:00
Bluetooth: Make smp_chan_destroy() private to smp.c There are no external users of smp_chan_destroy() so make it private to smp.c. The patch also moves the function higher up in the c-file in order to avoid forward declarations. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:44 +03:00
Bluetooth: Remove unnecessary 'send' parameter from smp_failure() The send parameter has only been used for determining whether to send a Pairing Failed PDU or not. However, the function can equally well use the already existing reason parameter to make this choice and send the PDU whenever a non-zero value was passed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-11-06 11:24:57 +02:00
Bluetooth: Centralize SMP pairing failure handling Signed-off-by: Brian Gix <bgix@codeaurora.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-11-23 08:28:36 -08:00
Bluetooth: Add address type to mgmt_ev_auth_failed This patch updates the Authentication Failed mgmt event to match the latest API specification by adding an address type to it. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Acked-by: Marcel Holtmann <marcel@holtmann.org>
2012-02-09 16:07:29 +02:00
Bluetooth: Add SMP-internal timeout callback This patch adds an SMP-internal timeout callback to remove the depenency on (the soon to be removed) l2cap_conn->security_timer. The behavior is the same as with l2cap_conn->security_timer except that the new l2cap_conn_shutdown() public function is used instead of the L2CAP core internal l2cap_conn_del(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:40 +03:00
Bluetooth: Add address type to mgmt_ev_auth_failed This patch updates the Authentication Failed mgmt event to match the latest API specification by adding an address type to it. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Acked-by: Marcel Holtmann <marcel@holtmann.org>
2012-02-09 16:07:29 +02:00
Bluetooth: Remove unnecessary 'send' parameter from smp_failure() The send parameter has only been used for determining whether to send a Pairing Failed PDU or not. However, the function can equally well use the already existing reason parameter to make this choice and send the PDU whenever a non-zero value was passed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-11-06 11:24:57 +02:00
Bluetooth: Centralize SMP pairing failure handling Signed-off-by: Brian Gix <bgix@codeaurora.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-11-23 08:28:36 -08:00
Bluetooth: Fix coding style violations in SMP handling The SMP source code has a few coding style violations. Fix them up all at once. No actual code has changed. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-10-13 05:43:25 -07:00
Bluetooth: Centralize SMP pairing failure handling Signed-off-by: Brian Gix <bgix@codeaurora.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-11-23 08:28:36 -08:00
Bluetooth: Fix mgmt pairing failure when authentication fails Whether through HCI with BR/EDR or SMP with LE when authentication fails we should also notify any pending Pair Device mgmt command. This patch updates the mgmt_auth_failed function to take the actual hci_conn object and makes sure that any pending pairing command is notified and cleaned up appropriately. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-08 17:09:49 -07:00
Bluetooth: Fix invalid memory access when there's no SMP channel We only should try to free the SMP channel that was created if there is a pending SMP session. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2012-02-01 18:27:56 -03:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Fix invalid memory access when there's no SMP channel We only should try to free the SMP channel that was created if there is a pending SMP session. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2012-02-01 18:27:56 -03:00
Bluetooth: Centralize SMP pairing failure handling Signed-off-by: Brian Gix <bgix@codeaurora.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-11-23 08:28:36 -08:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Add selection of the SC authentication method This patch adds code to select the authentication method for Secure Connections based on the local and remote capabilities. A new DSP_PASSKEY method is also added for displaying the passkey - something that is not part of legacy SMP pairing. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:51:02 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Add selection of the SC authentication method This patch adds code to select the authentication method for Secure Connections based on the local and remote capabilities. A new DSP_PASSKEY method is also added for displaying the passkey - something that is not part of legacy SMP pairing. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:51:02 +03:00
Bluetooth: Refactor authentication method lookup into its own function We'll need to do authentication method lookups from more than one place, so refactor the lookup into its own function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-17 13:07:38 +03:00
Bluetooth: Always confirm incoming SMP just-works requests For incoming requests we want to let the user know that pairing is happening since otherwise there could be access to MEDIUM security services without any user interaction at all. Therefore, set the selected method to JUST_CFM instead of JUST_WORKS and let it be converted back to JUST_WORKS later if we are the initators. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-09 19:18:09 +03:00
Bluetooth: Refactor authentication method lookup into its own function We'll need to do authentication method lookups from more than one place, so refactor the lookup into its own function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-17 13:07:38 +03:00
Bluetooth: Always confirm incoming SMP just-works requests For incoming requests we want to let the user know that pairing is happening since otherwise there could be access to MEDIUM security services without any user interaction at all. Therefore, set the selected method to JUST_CFM instead of JUST_WORKS and let it be converted back to JUST_WORKS later if we are the initators. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-09 19:18:09 +03:00
Bluetooth: Refactor authentication method lookup into its own function We'll need to do authentication method lookups from more than one place, so refactor the lookup into its own function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-17 13:07:38 +03:00
Bluetooth: Add selection of the SC authentication method This patch adds code to select the authentication method for Secure Connections based on the local and remote capabilities. A new DSP_PASSKEY method is also added for displaying the passkey - something that is not part of legacy SMP pairing. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:51:02 +03:00
Bluetooth: Refactor authentication method lookup into its own function We'll need to do authentication method lookups from more than one place, so refactor the lookup into its own function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-17 13:07:38 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Rename smp->smp_flags to smp->flags There's no reason to have "smp" in this variable name since it is already part of the SMP struct which provides sufficient context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:50 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Always confirm incoming SMP just-works requests For incoming requests we want to let the user know that pairing is happening since otherwise there could be access to MEDIUM security services without any user interaction at all. Therefore, set the selected method to JUST_CFM instead of JUST_WORKS and let it be converted back to JUST_WORKS later if we are the initators. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-09 19:18:09 +03:00
Bluetooth: Refactor authentication method lookup into its own function We'll need to do authentication method lookups from more than one place, so refactor the lookup into its own function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-17 13:07:38 +03:00
Bluetooth: Track authentication method in SMP context For Secure Connections we'll select the authentication method as soon as we receive the public key, but only use it later (both when actually triggering the method as well as when determining the quality of the resulting LTK). Store the method therefore in the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:48:26 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Track authentication method in SMP context For Secure Connections we'll select the authentication method as soon as we receive the public key, but only use it later (both when actually triggering the method as well as when determining the quality of the resulting LTK). Store the method therefore in the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:48:26 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Don't try to confirm locally initiated SMP pairing In the case that the just-works model would be triggered we only want to confirm remotely initiated pairings (i.e. those triggered by a Security Request or Pairing Request). This patch adds the necessary check to the tk_request function to fall back to the JUST_WORKS method in the case of a locally initiated pairing. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 14:39:07 +02:00
Bluetooth: Track authentication method in SMP context For Secure Connections we'll select the authentication method as soon as we receive the public key, but only use it later (both when actually triggering the method as well as when determining the quality of the resulting LTK). Store the method therefore in the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:48:26 +03:00
Bluetooth: Don't try to confirm locally initiated SMP pairing In the case that the just-works model would be triggered we only want to confirm remotely initiated pairings (i.e. those triggered by a Security Request or Pairing Request). This patch adds the necessary check to the tk_request function to fall back to the JUST_WORKS method in the case of a locally initiated pairing. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 14:39:07 +02:00
Bluetooth: Don't bother user space without IO capabilities If user space has a NoInputNoOutput IO capability it makes no sense to bother it with confirmation requests. This patch updates both SSP and SMP to check for the local IO capability before sending a user confirmation request to user space. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-16 15:09:13 +03:00
Bluetooth: Track authentication method in SMP context For Secure Connections we'll select the authentication method as soon as we receive the public key, but only use it later (both when actually triggering the method as well as when determining the quality of the resulting LTK). Store the method therefore in the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:48:26 +03:00
Bluetooth: Don't bother user space without IO capabilities If user space has a NoInputNoOutput IO capability it makes no sense to bother it with confirmation requests. This patch updates both SSP and SMP to check for the local IO capability before sending a user confirmation request to user space. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-16 15:09:13 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Track authentication method in SMP context For Secure Connections we'll select the authentication method as soon as we receive the public key, but only use it later (both when actually triggering the method as well as when determining the quality of the resulting LTK). Store the method therefore in the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:48:26 +03:00
Bluetooth: Rename smp->smp_flags to smp->flags There's no reason to have "smp" in this variable name since it is already part of the SMP struct which provides sufficient context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:50 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Add workaround for broken OS X legacy SMP pairing OS X version 10.10.2 (and possibly older versions) doesn't support LE Secure Connections but incorrectly copies all authentication request bits from a Security Request to its Pairing Request. The result is that an SC capable initiator (such as BlueZ) will think OS X intends to do SC when in fact it's incapable of it: < ACL Data TX: Handle 3585 flags 0x00 dlen 6 SMP: Security Request (0x0b) len 1 Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) > ACL Data RX: Handle 3585 flags 0x02 dlen 11 SMP: Pairing Request (0x01) len 6 IO capability: KeyboardDisplay (0x04) OOB data: Authentication data not present (0x00) Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) Max encryption key size: 16 Initiator key distribution: EncKey (0x01) Responder key distribution: EncKey IdKey Sign (0x07) < ACL Data TX: Handle 3585 flags 0x00 dlen 11 SMP: Pairing Response (0x02) len 6 IO capability: NoInputNoOutput (0x03) OOB data: Authentication data not present (0x00) Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) Max encryption key size: 16 Initiator key distribution: EncKey (0x01) Responder key distribution: EncKey Sign (0x05) The pairing eventually fails when we get an unexpected Pairing Confirm PDU instead of a Public Key PDU: > ACL Data RX: Handle 3585 flags 0x02 dlen 21 SMP: Pairing Confirm (0x03) len 16 Confim value: bcc3bed31b8f313a78ec3cce32685faf It is only at this point that we can speculate that the remote doesn't really support SC. This patch creates a workaround for the just-works model, however the MITM case is unsolvable because the OS X user has already been requested to enter a PIN which we're now expected to randomly generate and show the user (i.e. a chicken-and-egg problem). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-15 19:34:04 +02:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Track authentication method in SMP context For Secure Connections we'll select the authentication method as soon as we receive the public key, but only use it later (both when actually triggering the method as well as when determining the quality of the resulting LTK). Store the method therefore in the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:48:26 +03:00
Bluetooth: Rename smp->smp_flags to smp->flags There's no reason to have "smp" in this variable name since it is already part of the SMP struct which provides sufficient context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:50 +03:00
Bluetooth: Fix setting correct security level when initiating SMP We can only determine the final security level when both pairing request and response have been exchanged. When initiating pairing the starting target security level is set to MEDIUM unless explicitly specified to be HIGH, so that we can still perform pairing even if the remote doesn't have MITM capabilities. However, once we've received the pairing response we should re-consult the remote and local IO capabilities and upgrade the target security level if necessary. Without this patch the resulting Long Term Key will occasionally be reported to be unauthenticated when it in reality is an authenticated one. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org
2014-09-18 11:26:32 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Track authentication method in SMP context For Secure Connections we'll select the authentication method as soon as we receive the public key, but only use it later (both when actually triggering the method as well as when determining the quality of the resulting LTK). Store the method therefore in the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:48:26 +03:00
Bluetooth: Convert HCI_CONN_MASTER flag to a conn->role variable Having a dedicated u8 role variable in the hci_conn struct greatly simplifies tracking of the role, since this is the native way that it's represented on the HCI level. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-16 11:42:27 +03:00
Bluetooth: Track authentication method in SMP context For Secure Connections we'll select the authentication method as soon as we receive the public key, but only use it later (both when actually triggering the method as well as when determining the quality of the resulting LTK). Store the method therefore in the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:48:26 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Track authentication method in SMP context For Secure Connections we'll select the authentication method as soon as we receive the public key, but only use it later (both when actually triggering the method as well as when determining the quality of the resulting LTK). Store the method therefore in the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:48:26 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Fix SMP user passkey notification mgmt event When performing SMP pairing with MITM protection one side needs to enter the passkey while the other side displays to the user what needs to be entered. Nowhere in the SMP specification does it say that the displaying side needs to any kind of confirmation of the passkey, even though a code comment in smp.c implies this. This patch removes the misleading comment and converts the code to use the passkey notification mgmt event instead of the passkey confirmation mgmt event. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-19 14:14:53 +02:00
Bluetooth: Track authentication method in SMP context For Secure Connections we'll select the authentication method as soon as we receive the public key, but only use it later (both when actually triggering the method as well as when determining the quality of the resulting LTK). Store the method therefore in the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:48:26 +03:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Rename smp->smp_flags to smp->flags There's no reason to have "smp" in this variable name since it is already part of the SMP struct which provides sufficient context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:50 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Track authentication method in SMP context For Secure Connections we'll select the authentication method as soon as we receive the public key, but only use it later (both when actually triggering the method as well as when determining the quality of the resulting LTK). Store the method therefore in the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:48:26 +03:00
Bluetooth: Remove l2cap_conn->src and l2cap_conn->dst usage from SMP The l2cap_conn->src and l2cap_conn->dst addresses are just a pointer to hci_conn->hdev->bdaddr and hci_conn->dst structures. Use the data provided by hci_conn directly. This is done for hci_conn->dst_type already anyway and with this change it makes it a lot clearer were the address information comes from. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-10-13 02:23:39 -07:00
Bluetooth: Add address type to user_confirm and user_passkey messages This patch upadate the user confirm and user passkey mgmt messages to match the latest API specification by adding an address type parameter to them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Acked-by: Marcel Holtmann <marcel@holtmann.org>
2012-02-09 15:26:12 +02:00
Bluetooth: Track authentication method in SMP context For Secure Connections we'll select the authentication method as soon as we receive the public key, but only use it later (both when actually triggering the method as well as when determining the quality of the resulting LTK). Store the method therefore in the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:48:26 +03:00
Bluetooth: Fix SMP confirmation callback handling In the case that a local pairing confirmation (JUST_CFM) has been selected as the method we need to use the user confirm request mgmt event for it with the confirm_hint set to 1 (to indicate confirmation without any specific passkey value). Without this (if passkey_notify was used) the pairing would never proceed. This patch adds the necessary call to mgmt_user_confirm_request in this scenario. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 14:39:05 +02:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Fix SMP user passkey notification mgmt event When performing SMP pairing with MITM protection one side needs to enter the passkey while the other side displays to the user what needs to be entered. Nowhere in the SMP specification does it say that the displaying side needs to any kind of confirmation of the passkey, even though a code comment in smp.c implies this. This patch removes the misleading comment and converts the code to use the passkey notification mgmt event instead of the passkey confirmation mgmt event. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-19 14:14:53 +02:00
Bluetooth: Add address type to user_confirm and user_passkey messages This patch upadate the user confirm and user passkey mgmt messages to match the latest API specification by adding an address type parameter to them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Acked-by: Marcel Holtmann <marcel@holtmann.org>
2012-02-09 15:26:12 +02:00
Bluetooth: Fix passkey endianess in user_confirm and notify_passkey The passkey_notify and user_confirm functions in mgmt.c were expecting different endianess for the passkey, leading to a big endian bug and sparse warning in recently added SMP code. This patch converts both functions to expect host endianess and do the conversion to little endian only when assigning to the mgmt event struct. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-20 08:18:14 +02:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Update smp_confirm to return a response code Now that smp_confirm() is called "inline" we can have it return a response code and have the sending of it be done in the shared place for command handlers. One exception is when we're entering smp.c from mgmt.c when user space responds to authentication, in which case we still need our own code to call smp_failure(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:52 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Pass only crypto context to SMP crypto functions In order to make unit testing possible we need to make the SMP crypto functions only take the crypto context instead of the full SMP context (the latter would require having hci_dev, hci_conn, l2cap_chan, l2cap_conn, etc around). The drawback is that we no-longer get the involved hdev in the debug logs, but this is really the only way to make simple unit tests for the code. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-25 21:15:37 +02:00
Bluetooth: Use hdev->init/resp_addr values for smp_c1 function Now that we have nicely tracked values of the initiator and responder address information we can pass that directly to the smp_c1 function without worrying e.g. about who initiated the connection. This patch updates the two places in smp.c to use the new variables. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-28 12:54:17 +02:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Update smp_confirm to return a response code Now that smp_confirm() is called "inline" we can have it return a response code and have the sending of it be done in the shared place for command handlers. One exception is when we're entering smp.c from mgmt.c when user space responds to authentication, in which case we still need our own code to call smp_failure(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:52 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Rename smp->smp_flags to smp->flags There's no reason to have "smp" in this variable name since it is already part of the SMP struct which provides sufficient context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:50 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Update smp_confirm to return a response code Now that smp_confirm() is called "inline" we can have it return a response code and have the sending of it be done in the shared place for command handlers. One exception is when we're entering smp.c from mgmt.c when user space responds to authentication, in which case we still need our own code to call smp_failure(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:52 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Update smp_random to return a response code Since we're now calling smp_random() "inline" we can have it directly return a response code and have the shared command handler send the response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:51 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Update smp_random to return a response code Since we're now calling smp_random() "inline" we can have it directly return a response code and have the shared command handler send the response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:51 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Update SMP crypto functions to take the SMP context Passing the full SMP context instead of just the crypto context lets us use the crypto handle from the context which in turn removes the need to lock the hci_dev. Passing the SMP context instead of just the crypto handle allows a bit more detailed logging which is helpful in multi-adapter scenarios. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-27 14:23:04 +03:00
Bluetooth: Update smp_random to return a response code Since we're now calling smp_random() "inline" we can have it directly return a response code and have the shared command handler send the response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:51 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Pass only crypto context to SMP crypto functions In order to make unit testing possible we need to make the SMP crypto functions only take the crypto context instead of the full SMP context (the latter would require having hci_dev, hci_conn, l2cap_chan, l2cap_conn, etc around). The drawback is that we no-longer get the involved hdev in the debug logs, but this is really the only way to make simple unit tests for the code. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-25 21:15:37 +02:00
Bluetooth: Use hdev->init/resp_addr values for smp_c1 function Now that we have nicely tracked values of the initiator and responder address information we can pass that directly to the smp_c1 function without worrying e.g. about who initiated the connection. This patch updates the two places in smp.c to use the new variables. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-28 12:54:17 +02:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Update smp_random to return a response code Since we're now calling smp_random() "inline" we can have it directly return a response code and have the shared command handler send the response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:51 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Update smp_random to return a response code Since we're now calling smp_random() "inline" we can have it directly return a response code and have the shared command handler send the response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:51 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Use __le64 type for LE random numbers The random numbers in Bluetooth Low Energy are 64-bit numbers and should also be little endian since the HCI specification is little endian. Change the whole Low Energy pairing to use __le64 instead of a byte array. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-02-27 16:00:28 -08:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Pass only crypto context to SMP crypto functions In order to make unit testing possible we need to make the SMP crypto functions only take the crypto context instead of the full SMP context (the latter would require having hci_dev, hci_conn, l2cap_chan, l2cap_conn, etc around). The drawback is that we no-longer get the involved hdev in the debug logs, but this is really the only way to make simple unit tests for the code. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-25 21:15:37 +02:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Update smp_random to return a response code Since we're now calling smp_random() "inline" we can have it directly return a response code and have the shared command handler send the response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:51 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Fix encryption key size handling for LTKs The encryption key size for LTKs is supposed to be applied only at the moment of encryption. When generating a Link Key (using LE SC) from the LTK the full non-shortened value should be used. This patch modifies the code to always keep the full value around and only apply the key size when passing the value to HCI. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-08 18:14:39 +03:00
Bluetooth: Rename smp_key_size to enc_key_size This makes clear that this is the size of the key used to encrypt the link. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2012-01-30 19:29:12 -03:00
Bluetooth: Add flag to track STK encryption There are certain subtle differences in behavior when we're encrypted with the STK, such as allowing re-encryption even though the security level stays the same. Because of this, add a flag to track whether we're encrypted with an STK or not. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-01 19:14:12 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Fix setting correct authentication information for SMP STK When we store the STK in slave role we should set the correct authentication information for it. If the pairing is producing a HIGH security level the STK is considered authenticated, and otherwise it's considered unauthenticated. This patch fixes the value passed to the hci_add_ltk() function when adding the STK on the slave side. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Tested-by: Marcin Kraglak <marcin.kraglak@tieto.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org
2014-06-10 15:19:50 +03:00
Bluetooth: Use __le64 type for LE random numbers The random numbers in Bluetooth Low Energy are 64-bit numbers and should also be little endian since the HCI specification is little endian. Change the whole Low Energy pairing to use __le64 instead of a byte array. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-02-27 16:00:28 -08:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Pass only crypto context to SMP crypto functions In order to make unit testing possible we need to make the SMP crypto functions only take the crypto context instead of the full SMP context (the latter would require having hci_dev, hci_conn, l2cap_chan, l2cap_conn, etc around). The drawback is that we no-longer get the involved hdev in the debug logs, but this is really the only way to make simple unit tests for the code. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-25 21:15:37 +02:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Fix setting correct authentication information for SMP STK When we store the STK in slave role we should set the correct authentication information for it. If the pairing is producing a HIGH security level the STK is considered authenticated, and otherwise it's considered unauthenticated. This patch fixes the value passed to the hci_add_ltk() function when adding the STK on the slave side. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Tested-by: Marcin Kraglak <marcin.kraglak@tieto.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org
2014-06-10 15:19:50 +03:00
Bluetooth: Remove unnecessary SMP STK define We never store the "master" type of STKs since we request encryption directly with them so we only need one STK type (the one that's looked-up on the slave side). Simply remove the unnecessary define and rename the _SLAVE one to the shorter form. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-16 19:25:15 +03:00
Bluetooth: Remove l2cap_conn->src and l2cap_conn->dst usage from SMP The l2cap_conn->src and l2cap_conn->dst addresses are just a pointer to hci_conn->hdev->bdaddr and hci_conn->dst structures. Use the data provided by hci_conn directly. This is done for hci_conn->dst_type already anyway and with this change it makes it a lot clearer were the address information comes from. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-10-13 02:23:39 -07:00
Bluetooth: Remove HCI prefix from SMP LTK defines The LTK type has really nothing to do with HCI so it makes more sense to have these in smp.h than hci.h. This patch moves the defines to smp.h and removes the HCI_ prefix in the same go. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-16 19:25:16 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Update smp_random to return a response code Since we're now calling smp_random() "inline" we can have it directly return a response code and have the shared command handler send the response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:51 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Don't use remote address type to decide IRK persistency There are LE devices on the market that start off by announcing their public address and then once paired switch to using private address. To be interoperable with such devices we should simply trust the fact that we're receiving an IRK from them to indicate that they may use private addresses in the future. Instead, simply tie the persistency to the bonding/no-bonding information the same way as for LTKs and CSRKs. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-12 13:36:19 +02:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Don't use remote address type to decide IRK persistency There are LE devices on the market that start off by announcing their public address and then once paired switch to using private address. To be interoperable with such devices we should simply trust the fact that we're receiving an IRK from them to indicate that they may use private addresses in the future. Instead, simply tie the persistency to the bonding/no-bonding information the same way as for LTKs and CSRKs. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-12 13:36:19 +02:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Add support for LE SC key generation As the last step of the LE SC pairing process it's time to generate and distribute keys. The generation part is unique to LE SC and so this patch adds a dedicated function for it. We also clear the distribution bits for keys which are not distributed with LE SC, so that the code shared with legacy SMP will not go ahead and try to distribute them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:54:04 +03:00
Bluetooth: Fix BR/EDR Link Key type when derived through LE SC We need to set the correct Link Key type based on the properties of the LE SC pairing that it was derived from. If debug keys were used the type should be a debug key, and the authenticated vs unauthenticated information should be set on what kind of security level was reached. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-01 16:33:39 +03:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Fix BR/EDR Link Key type when derived through LE SC We need to set the correct Link Key type based on the properties of the LE SC pairing that it was derived from. If debug keys were used the type should be a debug key, and the authenticated vs unauthenticated information should be set on what kind of security level was reached. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-01 16:33:39 +03:00
Bluetooth: Add support for LE SC key generation As the last step of the LE SC pairing process it's time to generate and distribute keys. The generation part is unique to LE SC and so this patch adds a dedicated function for it. We also clear the distribution bits for keys which are not distributed with LE SC, so that the code shared with legacy SMP will not go ahead and try to distribute them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:54:04 +03:00
Bluetooth: Fix DHKey Check sending order for slave role According to the LE SC specification the initiating device sends its DHKey check first and the non-initiating devices sends its DHKey check as a response to this. It's also important that the non-initiating device doesn't send the response if it's still waiting for user input. In order to synchronize all this a new flag is added. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-04 11:07:40 +03:00
Bluetooth: Add support for LE SC key generation As the last step of the LE SC pairing process it's time to generate and distribute keys. The generation part is unique to LE SC and so this patch adds a dedicated function for it. We also clear the distribution bits for keys which are not distributed with LE SC, so that the code shared with legacy SMP will not go ahead and try to distribute them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:54:04 +03:00
Bluetooth: Use kzfree instead of kfree in security manager Within the security manager, it makes sense to use kzfree instead of kfree for all data structures. This ensures that no key material leaks by accident. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:18 -07:00
Bluetooth: Add support for LE SC key generation As the last step of the LE SC pairing process it's time to generate and distribute keys. The generation part is unique to LE SC and so this patch adds a dedicated function for it. We also clear the distribution bits for keys which are not distributed with LE SC, so that the code shared with legacy SMP will not go ahead and try to distribute them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:54:04 +03:00
Bluetooth: Use kzfree instead of kfree in security manager Within the security manager, it makes sense to use kzfree instead of kfree for all data structures. This ensures that no key material leaks by accident. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:18 -07:00
Bluetooth: Add support for LE SC key generation As the last step of the LE SC pairing process it's time to generate and distribute keys. The generation part is unique to LE SC and so this patch adds a dedicated function for it. We also clear the distribution bits for keys which are not distributed with LE SC, so that the code shared with legacy SMP will not go ahead and try to distribute them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:54:04 +03:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Remove unnecessary deferred work for SMP key distribution Now that the identity address update happens through its own deferred work there's no need to have smp_distribute_keys anymore behind a second deferred work. This patch removes this extra construction and makes the code do direct calls to smp_distribute_keys() again. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:51 +03:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Always call smp_distribute_keys() from a workqueue The smp_distribute_keys() function calls smp_notify_keys() which in turn calls l2cap_conn_update_id_addr(). The l2cap_conn_update_id_addr() function will iterate through all L2CAP channels for the respective connection: lock the channel, update the address information and unlock the channel. Since SMP is now using l2cap_chan callbacks each callback is called with the channel lock held. Therefore, calling l2cap_conn_update_id_addr() would cause a deadlock calling l2cap_chan_lock() on the SMP channel. This patch moves calling smp_distribute_keys() through a workqueue so that it is never called from an L2CAP channel callback. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:43 +03:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Always call smp_distribute_keys() from a workqueue The smp_distribute_keys() function calls smp_notify_keys() which in turn calls l2cap_conn_update_id_addr(). The l2cap_conn_update_id_addr() function will iterate through all L2CAP channels for the respective connection: lock the channel, update the address information and unlock the channel. Since SMP is now using l2cap_chan callbacks each callback is called with the channel lock held. Therefore, calling l2cap_conn_update_id_addr() would cause a deadlock calling l2cap_chan_lock() on the SMP channel. This patch moves calling smp_distribute_keys() through a workqueue so that it is never called from an L2CAP channel callback. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:43 +03:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Add support for LE SC key generation As the last step of the LE SC pairing process it's time to generate and distribute keys. The generation part is unique to LE SC and so this patch adds a dedicated function for it. We also clear the distribution bits for keys which are not distributed with LE SC, so that the code shared with legacy SMP will not go ahead and try to distribute them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:54:04 +03:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Add support for LE SC key generation As the last step of the LE SC pairing process it's time to generate and distribute keys. The generation part is unique to LE SC and so this patch adds a dedicated function for it. We also clear the distribution bits for keys which are not distributed with LE SC, so that the code shared with legacy SMP will not go ahead and try to distribute them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:54:04 +03:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Add support for LE SC key generation As the last step of the LE SC pairing process it's time to generate and distribute keys. The generation part is unique to LE SC and so this patch adds a dedicated function for it. We also clear the distribution bits for keys which are not distributed with LE SC, so that the code shared with legacy SMP will not go ahead and try to distribute them. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:54:04 +03:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Fix exposing full value of shortened LTKs When we notify user space of a new LTK or distribute an LTK to the remote peer the value passed should be the shortened version so that it's easy to compare values in various traces. The core spec also sets the requirements for the shortening/masking as: "The masking shall be done after generation and before being distributed, used or stored." Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-10 11:11:20 +03:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Update New CSRK event to match latest specification The 'master' parameter of the New CSRK event was recently renamed to 'type', with the old values kept for backwards compatibility as unauthenticated local/remote keys. This patch updates the code to take into account the two new (authenticated) values and ensures they get used based on the security level of the connection that the respective keys get distributed over. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-02-27 10:11:13 +02:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Always call smp_distribute_keys() from a workqueue The smp_distribute_keys() function calls smp_notify_keys() which in turn calls l2cap_conn_update_id_addr(). The l2cap_conn_update_id_addr() function will iterate through all L2CAP channels for the respective connection: lock the channel, update the address information and unlock the channel. Since SMP is now using l2cap_chan callbacks each callback is called with the channel lock held. Therefore, calling l2cap_conn_update_id_addr() would cause a deadlock calling l2cap_chan_lock() on the SMP channel. This patch moves calling smp_distribute_keys() through a workqueue so that it is never called from an L2CAP channel callback. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:43 +03:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Add SMP-internal timeout callback This patch adds an SMP-internal timeout callback to remove the depenency on (the soon to be removed) l2cap_conn->security_timer. The behavior is the same as with l2cap_conn->security_timer except that the new l2cap_conn_shutdown() public function is used instead of the L2CAP core internal l2cap_conn_del(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:40 +03:00
Bluetooth: Use hci_disconnect for immediate disconnection from SMP Relying on the l2cap_conn_del procedure (triggered through the l2cap_conn_shutdown API) to get the connection disconnected is not reliable as it depends on all users releasing (through hci_conn_drop) and that there's at least one user (so hci_conn_drop is called at least one time). A much simpler and more reliable solution is to call hci_disconnect() directly from the SMP code when we want to disconnect. One side-effect this has is that it prevents any SMP Failure PDU from being sent before the disconnection, however neither one of the scenarios where l2cap_conn_shutdown was used really requires this. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-18 20:33:29 +03:00
Bluetooth: Add SMP-internal timeout callback This patch adds an SMP-internal timeout callback to remove the depenency on (the soon to be removed) l2cap_conn->security_timer. The behavior is the same as with l2cap_conn->security_timer except that the new l2cap_conn_shutdown() public function is used instead of the L2CAP core internal l2cap_conn_del(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:40 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Fix coding style violations in SMP handling The SMP source code has a few coding style violations. Fix them up all at once. No actual code has changed. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-10-13 05:43:25 -07:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Add dedicated AES instance for each SMP context Many places have to be extra careful to not hold the hdev lock when calling into the SMP code. This is because the SMP crypto functions use the crypto handle that's part of the hci_dev struct. Giving the SMP context its own handle helps simplifying the locking logic and removes the risk for deadlocks. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-27 14:23:03 +03:00
Bluetooth: Use kzfree instead of kfree in security manager Within the security manager, it makes sense to use kzfree instead of kfree for all data structures. This ensures that no key material leaks by accident. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:18 -07:00
Bluetooth: Add dedicated AES instance for each SMP context Many places have to be extra careful to not hold the hdev lock when calling into the SMP code. This is because the SMP crypto functions use the crypto handle that's part of the hci_dev struct. Giving the SMP context its own handle helps simplifying the locking logic and removes the risk for deadlocks. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-27 14:23:03 +03:00
Bluetooth: Add basic support for AES-CMAC Most of the LE Secure Connections SMP crypto functions build on top of the AES-CMAC function. This patch adds access to AES-CMAC in the kernel crypto subsystem by allocating a crypto_hash handle for it in a similar way that we have one for AES-CBC. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-02 14:19:47 +03:00
Bluetooth: Use kzfree instead of kfree in security manager Within the security manager, it makes sense to use kzfree instead of kfree for all data structures. This ensures that no key material leaks by accident. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:18 -07:00
Bluetooth: Add basic support for AES-CMAC Most of the LE Secure Connections SMP crypto functions build on top of the AES-CMAC function. This patch adds access to AES-CMAC in the kernel crypto subsystem by allocating a crypto_hash handle for it in a similar way that we have one for AES-CBC. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-02 14:19:47 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Add SMP-internal timeout callback This patch adds an SMP-internal timeout callback to remove the depenency on (the soon to be removed) l2cap_conn->security_timer. The behavior is the same as with l2cap_conn->security_timer except that the new l2cap_conn_shutdown() public function is used instead of the L2CAP core internal l2cap_conn_del(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:40 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Add support for SC just-works pairing If the just-works method was chosen we shouldn't send anything to user space but simply proceed with sending the DHKey Check PDU. This patch adds the necessary code for it. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-01 15:38:09 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Add basic LE SC OOB support for remote OOB data This patch adds basic OOB pairing support when we've received the remote OOB data. This includes tracking the remote r value (in smp->rr) as well as doing the appropriate f4() call when needed. Previously the OOB rand would have been stored in smp->rrnd however these are actually two independent values so we need separate variables for them. Na/Nb in the spec maps to smp->prnd/rrnd and ra/rb maps to smp->rr with smp->pr to come once local OOB data is supported. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-28 15:17:05 +01:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Add support for SC just-works pairing If the just-works method was chosen we shouldn't send anything to user space but simply proceed with sending the DHKey Check PDU. This patch adds the necessary code for it. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-01 15:38:09 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Fix DHKey Check sending order for slave role According to the LE SC specification the initiating device sends its DHKey check first and the non-initiating devices sends its DHKey check as a response to this. It's also important that the non-initiating device doesn't send the response if it's still waiting for user input. In order to synchronize all this a new flag is added. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-04 11:07:40 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Fix DHKey Check sending order for slave role According to the LE SC specification the initiating device sends its DHKey check first and the non-initiating devices sends its DHKey check as a response to this. It's also important that the non-initiating device doesn't send the response if it's still waiting for user input. In order to synchronize all this a new flag is added. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-04 11:07:40 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Add support for SC just-works pairing If the just-works method was chosen we shouldn't send anything to user space but simply proceed with sending the DHKey Check PDU. This patch adds the necessary code for it. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-01 15:38:09 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Add support for SC just-works pairing If the just-works method was chosen we shouldn't send anything to user space but simply proceed with sending the DHKey Check PDU. This patch adds the necessary code for it. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-01 15:38:09 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Add support for SC just-works pairing If the just-works method was chosen we shouldn't send anything to user space but simply proceed with sending the DHKey Check PDU. This patch adds the necessary code for it. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-01 15:38:09 +03:00
Bluetooth: Fix DHKey Check sending order for slave role According to the LE SC specification the initiating device sends its DHKey check first and the non-initiating devices sends its DHKey check as a response to this. It's also important that the non-initiating device doesn't send the response if it's still waiting for user input. In order to synchronize all this a new flag is added. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-04 11:07:40 +03:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Remove unnecessary hcon->smp_conn variable The smp_conn member of struct hci_conn was simply a pointer to the l2cap_conn object. Since we already have hcon->l2cap_data that points to the same thing there's no need to have this second variable. This patch removes it and changes the single place that was using it to use hcon->l2cap_data instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-27 14:23:07 +03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Rename smp->smp_flags to smp->flags There's no reason to have "smp" in this variable name since it is already part of the SMP struct which provides sufficient context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:50 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Remove unnecessary 'send' parameter from smp_failure() The send parameter has only been used for determining whether to send a Pairing Failed PDU or not. However, the function can equally well use the already existing reason parameter to make this choice and send the PDU whenever a non-zero value was passed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-11-06 11:24:57 +02:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Remove unnecessary 'send' parameter from smp_failure() The send parameter has only been used for determining whether to send a Pairing Failed PDU or not. However, the function can equally well use the already existing reason parameter to make this choice and send the PDU whenever a non-zero value was passed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-11-06 11:24:57 +02:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Update smp_confirm to return a response code Now that smp_confirm() is called "inline" we can have it return a response code and have the sending of it be done in the shared place for command handlers. One exception is when we're entering smp.c from mgmt.c when user space responds to authentication, in which case we still need our own code to call smp_failure(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:52 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Use actual encryption key size for SMP over BR/EDR When pairing over SMP over BR/EDR the generated LTK has by default the same key size as the BR/EDR Link Key. Make sure we don't set our Pairing Request/Response max value to anything higher than that. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:30 +03:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Use actual encryption key size for SMP over BR/EDR When pairing over SMP over BR/EDR the generated LTK has by default the same key size as the BR/EDR Link Key. Make sure we don't set our Pairing Request/Response max value to anything higher than that. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:30 +03:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Add key size checks for SMP This patch implements a check in smp cmd pairing request and pairing response to verify if encryption key maximum size is compatible in both slave and master when SMP Pairing is requested. Keys are also masked to the correct negotiated size. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-14 13:37:42 -03:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluteooth: Reject SMP bonding if HCI_PAIRABLE is not set If the remote device tries to initiate bonding with us and we don't have HCI_PAIRABLE set we should just flat out reject the request. This brings SMP in line with how the flag is used for BR/EDR SSP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-10 11:02:07 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Fix overriding higher security level in SMP When we receive a pairing request or an internal request to start pairing we shouldn't blindly overwrite the existing pending_sec_level value as that may actually be higher than the new one. This patch fixes the SMP code to only overwrite the value in case the new one is higher than the old. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-17 13:07:37 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Fix missing PDU length checks for SMP For each received SMP PDU we need to check that we have enough data to fit the specified size of the PDU. This patch adds the necessary checks for each SMP PDU handler and ensures that buffer overflows do not occur if to little data has been received. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:29 +02:00
Bluetooth: Add support for SMP Invalid Parameters error code The Invalid Parameters error code is used to indicate that the command length is invalid or that a parameter is outside of the specified range. This error code wasn't clearly specified in the Bluetooth 4.0 specification but since 4.1 this has been fixed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-08 14:19:11 +03:00
Bluetooth: Fix missing PDU length checks for SMP For each received SMP PDU we need to check that we have enough data to fit the specified size of the PDU. This patch adds the necessary checks for each SMP PDU handler and ensures that buffer overflows do not occur if to little data has been received. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:29 +02:00
Bluetooth: Convert HCI_CONN_MASTER flag to a conn->role variable Having a dedicated u8 role variable in the hci_conn struct greatly simplifies tracking of the role, since this is the native way that it's represented on the HCI level. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-16 11:42:27 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: smp: Fix possible NULL dereference smp_chan_create might return NULL so we need to check before dereferencing smp. Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
2012-07-19 17:03:43 +03:00
Bluetooth: Add a flag to indicate that SMP is going on Add HCI_CONN_LE_SMP_PEND flag to indicate that SMP is pending for that connection. This allows to have information that an SMP procedure is going on for that connection. We use the HCI_CONN_ENCRYPT_PEND to indicate that encryption (HCI_LE_Start_Encryption) is pending for that connection. While a SMP procedure is going on we hold an reference to the connection, to avoid disconnections. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-19 21:06:51 -03:00
Bluetooth: Fix ignoring unknown SMP authentication requirement bits The SMP specification states that we should ignore any unknown bits from the authentication requirement. We already have a define for masking out unknown bits but we haven't used it in all places so far. This patch adds usage of the AUTH_REQ_MASK to all places that need it and ensures that we don't pass unknown bits onward to other functions. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:37:42 -07:00
Bluetooth: Make auth_req mask dependent on SC enabled or not If we haven't enabled SC support on our side we should use the same mask for the authentication requirement as we were using before SC support was added, otherwise we should use the extended mask for SC. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-26 13:29:28 +03:00
Bluetooth: Fix ignoring unknown SMP authentication requirement bits The SMP specification states that we should ignore any unknown bits from the authentication requirement. We already have a define for masking out unknown bits but we haven't used it in all places so far. This patch adds usage of the AUTH_REQ_MASK to all places that need it and ensures that we don't pass unknown bits onward to other functions. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:37:42 -07:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Fix ignoring unknown SMP authentication requirement bits The SMP specification states that we should ignore any unknown bits from the authentication requirement. We already have a define for masking out unknown bits but we haven't used it in all places so far. This patch adds usage of the AUTH_REQ_MASK to all places that need it and ensures that we don't pass unknown bits onward to other functions. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:37:42 -07:00
Bluteooth: Reject SMP bonding if HCI_PAIRABLE is not set If the remote device tries to initiate bonding with us and we don't have HCI_PAIRABLE set we should just flat out reject the request. This brings SMP in line with how the flag is used for BR/EDR SSP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-10 11:02:07 +03:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Add SC-only mode support for SMP When Secure Connections-only mode is enabled we should reject any pairing command that does not have Secure Connections set in the authentication requirements. This patch adds the appropriate logic for this to the command handlers of Pairing Request/Response and Security Request. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-08 16:59:18 -07:00
Bluetooth: Move SMP fields to a separate structure The objective is to make the core to have as little as possible information about SMP procedures and logic. Now, all the SMP specific information is hidden from the core. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:30 -03:00
Bluetooth: Add key size checks for SMP This patch implements a check in smp cmd pairing request and pairing response to verify if encryption key maximum size is compatible in both slave and master when SMP Pairing is requested. Keys are also masked to the correct negotiated size. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-14 13:37:42 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Add clarifying comment when setting local OOB flag It might be a bit counterintuitive to set a 'local' flag based on remote data. This patch adds a clarifying comment to the pairing req/rsp handlers when setting the LOCAL_OOB flag based on the PDU received from the remote side. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16 21:12:34 +02:00
Bluetooth: Set local OOB data flag if remote has our OOB data If the SMP Pairing Request or Response PDU received from the remote device indicates that it has received our OOB data we should set the SMP_FLAG_LOCAL_OOB flag. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16 11:45:45 +02:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Check for force_lesc_support before rejecting SMP over BR/EDR The SMP over BR/EDR requests for cross-transport pairing should also accepted when the debugfs setting force_lesc_support has been enabled. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-12-07 16:19:12 +01:00
Bluetooth: Merge hdev->dbg_flags fields into hdev->dev_flags With the extension of hdev->dev_flags utilizing a bitmap now, the space is no longer restricted. Merge the hdev->dbg_flags into hdev->dev_flags to save space on 64-bit architectures. On 32-bit architectures no size reduction happens. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 10:20:35 -07:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Add selection of the SC authentication method This patch adds code to select the authentication method for Secure Connections based on the local and remote capabilities. A new DSP_PASSKEY method is also added for displaying the passkey - something that is not part of legacy SMP pairing. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:51:02 +03:00
Bluetooth: Avoid hard-coded IO capability values in SMP This is a trivial change to use a proper define for the NoInputNoOutput IO capability instead of hard-coded values. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:58:54 -07:00
Bluetooth: Fix SMP security level when we have no IO capabilities When the local IO capability is NoInputNoOutput any attempt to convert the remote authentication requirement to a target security level is futile. This patch makes sure that we set the target security level at most to MEDIUM if the local IO capability is NoInputNoOutput. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:37:44 -07:00
Bluetooth: Fix overriding higher security level in SMP When we receive a pairing request or an internal request to start pairing we shouldn't blindly overwrite the existing pending_sec_level value as that may actually be higher than the new one. This patch fixes the SMP code to only overwrite the value in case the new one is higher than the old. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-17 13:07:37 +03:00
Bluetooth: Set security level on incoming pairing request If a master would like to raise the security level, it will send a pairing request. While the pending security level is set on an incoming security request (from a slave), it is not set on a pairing request. As a result, the security level would not be raised on the slave in such case. Fix this by setting the pending security when receiving pairing requests according to the requested authorization. Signed-off-by: Ido Yariv <ido@wizery.com> Acked-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2012-03-05 20:09:38 +02:00
Bluetooth: spelling fixes Fix spelling errors in comments. Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-27 21:12:20 -07:00
Bluetooth: Fix rejecting pairing in case of insufficient capabilities If we need an MITM protected connection but the local and remote IO capabilities cannot provide it we should reject the pairing attempt in the appropriate way. This patch adds the missing checks for such a situation to the smp_cmd_pairing_req() and smp_cmd_pairing_rsp() functions. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-17 13:07:39 +03:00
Bluetooth: Add key size checks for SMP This patch implements a check in smp cmd pairing request and pairing response to verify if encryption key maximum size is compatible in both slave and master when SMP Pairing is requested. Keys are also masked to the correct negotiated size. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-14 13:37:42 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Remove useless smp_rand function This function was always just making a single get_random_bytes() call and always returning the value 0. It's simpler to just call get_random_bytes() directly where needed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-02 10:49:03 +02:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Move SMP fields to a separate structure The objective is to make the core to have as little as possible information about SMP procedures and logic. Now, all the SMP specific information is hidden from the core. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:30 -03:00
Bluetooth: Add SMP confirmation structs This patch adds initial support for verifying the confirmation value that the remote side has sent. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:45 -03:00
Bluetooth: Add key size checks for SMP This patch implements a check in smp cmd pairing request and pairing response to verify if encryption key maximum size is compatible in both slave and master when SMP Pairing is requested. Keys are also masked to the correct negotiated size. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-14 13:37:42 -03:00
Bluetooth: Add basic support for sending our LE SC public key When the initial pairing request & response PDUs have been exchanged and both have had the LE SC bit set the next step is to generate a ECDH key pair and to send the public key to the remote side. This patch adds basic support for generating the key pair and sending the public key using the new Public Key SMP PDU. It is the initiating device that sends the public key first and the non-initiating device responds by sending its public key respectively (in a subsequent patch). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 10:50:15 +03:00
Bluetooth: Add workaround for broken OS X legacy SMP pairing OS X version 10.10.2 (and possibly older versions) doesn't support LE Secure Connections but incorrectly copies all authentication request bits from a Security Request to its Pairing Request. The result is that an SC capable initiator (such as BlueZ) will think OS X intends to do SC when in fact it's incapable of it: < ACL Data TX: Handle 3585 flags 0x00 dlen 6 SMP: Security Request (0x0b) len 1 Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) > ACL Data RX: Handle 3585 flags 0x02 dlen 11 SMP: Pairing Request (0x01) len 6 IO capability: KeyboardDisplay (0x04) OOB data: Authentication data not present (0x00) Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) Max encryption key size: 16 Initiator key distribution: EncKey (0x01) Responder key distribution: EncKey IdKey Sign (0x07) < ACL Data TX: Handle 3585 flags 0x00 dlen 11 SMP: Pairing Response (0x02) len 6 IO capability: NoInputNoOutput (0x03) OOB data: Authentication data not present (0x00) Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) Max encryption key size: 16 Initiator key distribution: EncKey (0x01) Responder key distribution: EncKey Sign (0x05) The pairing eventually fails when we get an unexpected Pairing Confirm PDU instead of a Public Key PDU: > ACL Data RX: Handle 3585 flags 0x02 dlen 21 SMP: Pairing Confirm (0x03) len 16 Confim value: bcc3bed31b8f313a78ec3cce32685faf It is only at this point that we can speculate that the remote doesn't really support SC. This patch creates a workaround for the just-works model, however the MITM case is unsolvable because the OS X user has already been requested to enter a PIN which we're now expected to randomly generate and show the user (i.e. a chicken-and-egg problem). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-15 19:34:04 +02:00
Bluetooth: Add basic support for sending our LE SC public key When the initial pairing request & response PDUs have been exchanged and both have had the LE SC bit set the next step is to generate a ECDH key pair and to send the public key to the remote side. This patch adds basic support for generating the key pair and sending the public key using the new Public Key SMP PDU. It is the initiating device that sends the public key first and the non-initiating device responds by sending its public key respectively (in a subsequent patch). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 10:50:15 +03:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Add basic support for sending our LE SC public key When the initial pairing request & response PDUs have been exchanged and both have had the LE SC bit set the next step is to generate a ECDH key pair and to send the public key to the remote side. This patch adds basic support for generating the key pair and sending the public key using the new Public Key SMP PDU. It is the initiating device that sends the public key first and the non-initiating device responds by sending its public key respectively (in a subsequent patch). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 10:50:15 +03:00
Bluetooth: Use debug keys for SMP when HCI_USE_DEBUG_KEYS is set The HCI_USE_DEBUG_KEYS flag is intended to force our side to always use debug keys for pairing. This means both BR/EDR SSP as well as SMP with LE Secure Connections. This patch updates the SMP code to use the debug keys instead of generating a random local key pair when the flag is set. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-24 15:22:59 +03:00
Bluetooth: Add basic support for sending our LE SC public key When the initial pairing request & response PDUs have been exchanged and both have had the LE SC bit set the next step is to generate a ECDH key pair and to send the public key to the remote side. This patch adds basic support for generating the key pair and sending the public key using the new Public Key SMP PDU. It is the initiating device that sends the public key first and the non-initiating device responds by sending its public key respectively (in a subsequent patch). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 10:50:15 +03:00
Bluetooth: Track local vs remote OOB data availability There are several decisions in the SMP logic that depend not only on whether we're doing SMP or not, but also whether local and/or remote OOB data is present. This patch splits the existing SMP_FLAG_OOB into two new flags to track local and remote OOB data respectively. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16 11:45:44 +02:00
Bluetooth: Use OOB key pair for LE SC pairing with OOB method The OOB public and secret key pair is different from the non-OOB pairing procedure. SO when OOB method is in use, then use this key pair instead of generating a new one. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:24 -07:00
Bluetooth: Rename smp->local_rr into smp->local_rand The variable for the out-of-band random number was badly named and with that confusing. Just rename it to local_rand so it is clear what value it represents. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 12:34:57 -07:00
Bluetooth: Use OOB key pair for LE SC pairing with OOB method The OOB public and secret key pair is different from the non-OOB pairing procedure. SO when OOB method is in use, then use this key pair instead of generating a new one. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:24 -07:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Use debug keys for SMP when HCI_USE_DEBUG_KEYS is set The HCI_USE_DEBUG_KEYS flag is intended to force our side to always use debug keys for pairing. This means both BR/EDR SSP as well as SMP with LE Secure Connections. This patch updates the SMP code to use the debug keys instead of generating a random local key pair when the flag is set. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-24 15:22:59 +03:00
Bluetooth: Add check for accidentally generating a debug key It is very unlikely, but to have a 100% guarantee of the generated key type we need to reject any keys which happen to match the debug key. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 15:33:30 +03:00
Bluetooth: Use debug keys for SMP when HCI_USE_DEBUG_KEYS is set The HCI_USE_DEBUG_KEYS flag is intended to force our side to always use debug keys for pairing. This means both BR/EDR SSP as well as SMP with LE Secure Connections. This patch updates the SMP code to use the debug keys instead of generating a random local key pair when the flag is set. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-24 15:22:59 +03:00
Bluetooth: Add check for accidentally generating a debug key It is very unlikely, but to have a 100% guarantee of the generated key type we need to reject any keys which happen to match the debug key. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 15:33:30 +03:00
Bluetooth: Add basic support for sending our LE SC public key When the initial pairing request & response PDUs have been exchanged and both have had the LE SC bit set the next step is to generate a ECDH key pair and to send the public key to the remote side. This patch adds basic support for generating the key pair and sending the public key using the new Public Key SMP PDU. It is the initiating device that sends the public key first and the non-initiating device responds by sending its public key respectively (in a subsequent patch). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 10:50:15 +03:00
Bluetooth: Use OOB key pair for LE SC pairing with OOB method The OOB public and secret key pair is different from the non-OOB pairing procedure. SO when OOB method is in use, then use this key pair instead of generating a new one. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:24 -07:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Use smp->local_pk + 32 instead of &smp->local_pk[32] Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:25 -07:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Add basic support for sending our LE SC public key When the initial pairing request & response PDUs have been exchanged and both have had the LE SC bit set the next step is to generate a ECDH key pair and to send the public key to the remote side. This patch adds basic support for generating the key pair and sending the public key using the new Public Key SMP PDU. It is the initiating device that sends the public key first and the non-initiating device responds by sending its public key respectively (in a subsequent patch). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 10:50:15 +03:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Add key size checks for SMP This patch implements a check in smp cmd pairing request and pairing response to verify if encryption key maximum size is compatible in both slave and master when SMP Pairing is requested. Keys are also masked to the correct negotiated size. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-14 13:37:42 -03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Make auth_req mask dependent on SC enabled or not If we haven't enabled SC support on our side we should use the same mask for the authentication requirement as we were using before SC support was added, otherwise we should use the extended mask for SC. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-26 13:29:28 +03:00
Bluetooth: Remove unnecessary early initialization of variable We do nothing else with the auth variable in smp_cmd_pairing_rsp() besides passing it to tk_request() which in turn only cares about whether one of the sides had the MITM bit set. It is therefore unnecessary to assign a value to it until just before calling tk_request(), and this value can simply be the bit-wise or of the local and remote requirements. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:37:41 -07:00
Bluetooth: Add SMP confirmation checks methods This patch includes support for generating and sending the random value used to produce the confirmation value. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:46 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Fix missing PDU length checks for SMP For each received SMP PDU we need to check that we have enough data to fit the specified size of the PDU. This patch adds the necessary checks for each SMP PDU handler and ensures that buffer overflows do not occur if to little data has been received. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:29 +02:00
Bluetooth: Add support for SMP Invalid Parameters error code The Invalid Parameters error code is used to indicate that the command length is invalid or that a parameter is outside of the specified range. This error code wasn't clearly specified in the Bluetooth 4.0 specification but since 4.1 this has been fixed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-08 14:19:11 +03:00
Bluetooth: Fix missing PDU length checks for SMP For each received SMP PDU we need to check that we have enough data to fit the specified size of the PDU. This patch adds the necessary checks for each SMP PDU handler and ensures that buffer overflows do not occur if to little data has been received. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:29 +02:00
Bluetooth: Convert HCI_CONN_MASTER flag to a conn->role variable Having a dedicated u8 role variable in the hci_conn struct greatly simplifies tracking of the role, since this is the native way that it's represented on the HCI level. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-16 11:42:27 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Add key size checks for SMP This patch implements a check in smp cmd pairing request and pairing response to verify if encryption key maximum size is compatible in both slave and master when SMP Pairing is requested. Keys are also masked to the correct negotiated size. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-14 13:37:42 -03:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Move SMP fields to a separate structure The objective is to make the core to have as little as possible information about SMP procedures and logic. Now, all the SMP specific information is hidden from the core. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:30 -03:00
Bluetooth: Add key size checks for SMP This patch implements a check in smp cmd pairing request and pairing response to verify if encryption key maximum size is compatible in both slave and master when SMP Pairing is requested. Keys are also masked to the correct negotiated size. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-14 13:37:42 -03:00
Bluetooth: Make auth_req mask dependent on SC enabled or not If we haven't enabled SC support on our side we should use the same mask for the authentication requirement as we were using before SC support was added, otherwise we should use the extended mask for SC. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-26 13:29:28 +03:00
Bluetooth: Fix ignoring unknown SMP authentication requirement bits The SMP specification states that we should ignore any unknown bits from the authentication requirement. We already have a define for masking out unknown bits but we haven't used it in all places so far. This patch adds usage of the AUTH_REQ_MASK to all places that need it and ensures that we don't pass unknown bits onward to other functions. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:37:42 -07:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Add SC-only mode support for SMP When Secure Connections-only mode is enabled we should reject any pairing command that does not have Secure Connections set in the authentication requirements. This patch adds the appropriate logic for this to the command handlers of Pairing Request/Response and Security Request. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-08 16:59:18 -07:00
Bluetooth: Add clarifying comment when setting local OOB flag It might be a bit counterintuitive to set a 'local' flag based on remote data. This patch adds a clarifying comment to the pairing req/rsp handlers when setting the LOCAL_OOB flag based on the PDU received from the remote side. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16 21:12:34 +02:00
Bluetooth: Set local OOB data flag if remote has our OOB data If the SMP Pairing Request or Response PDU received from the remote device indicates that it has received our OOB data we should set the SMP_FLAG_LOCAL_OOB flag. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16 11:45:45 +02:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Add SMP flag for SC and set it when necessary. This patch adds a new SMP flag for tracking whether Secure Connections is in use and sets the flag when both remote and local side have elected to use Secure Connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-16 11:03:34 +03:00
Bluetooth: Update SMP security level to/from auth_req for SC This patch updates the functions which map the SMP authentication request to a security level and vice-versa to take into account the Secure Connections feature. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-16 10:59:06 +03:00
Bluetooth: Add SMP flag for SC and set it when necessary. This patch adds a new SMP flag for tracking whether Secure Connections is in use and sets the flag when both remote and local side have elected to use Secure Connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-16 11:03:34 +03:00
Bluetooth: spelling fixes Fix spelling errors in comments. Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-27 21:12:20 -07:00
Bluetooth: Fix rejecting pairing in case of insufficient capabilities If we need an MITM protected connection but the local and remote IO capabilities cannot provide it we should reject the pairing attempt in the appropriate way. This patch adds the missing checks for such a situation to the smp_cmd_pairing_req() and smp_cmd_pairing_rsp() functions. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-17 13:07:39 +03:00
Bluetooth: Remove useless smp_rand function This function was always just making a single get_random_bytes() call and always returning the value 0. It's simpler to just call get_random_bytes() directly where needed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-02 10:49:03 +02:00
Bluetooth: Add SMP confirmation checks methods This patch includes support for generating and sending the random value used to produce the confirmation value. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:46 -03:00
Bluetooth: Fix updating SMP remote key distribution information When performing pairing using SMP the remote may clear any key distribution bits it wants in its pairing response. We must therefore update our local variable accordingly, otherwise we might get stuck waiting for keys that will never come. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-14 10:53:50 +02:00
Bluetooth: Add basic support for sending our LE SC public key When the initial pairing request & response PDUs have been exchanged and both have had the LE SC bit set the next step is to generate a ECDH key pair and to send the public key to the remote side. This patch adds basic support for generating the key pair and sending the public key using the new Public Key SMP PDU. It is the initiating device that sends the public key first and the non-initiating device responds by sending its public key respectively (in a subsequent patch). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 10:50:15 +03:00
Bluetooth: Fix ignoring unknown SMP authentication requirement bits The SMP specification states that we should ignore any unknown bits from the authentication requirement. We already have a define for masking out unknown bits but we haven't used it in all places so far. This patch adds usage of the AUTH_REQ_MASK to all places that need it and ensures that we don't pass unknown bits onward to other functions. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:37:42 -07:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Fix SMP pairing method selection The tk_request function takes the local IO capability as the second last parameter and the remote IO capability as the last parameter. They were previously swapped: when we receive a pairing response req->io_capability contains the local one and rsp->io_capability the remote one. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
2012-06-06 18:54:15 +08:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Rename smp->smp_flags to smp->flags There's no reason to have "smp" in this variable name since it is already part of the SMP struct which provides sufficient context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:50 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Rename smp->smp_flags to smp->flags There's no reason to have "smp" in this variable name since it is already part of the SMP struct which provides sufficient context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:50 +03:00
Bluetooth: Update smp_confirm to return a response code Now that smp_confirm() is called "inline" we can have it return a response code and have the sending of it be done in the shared place for command handlers. One exception is when we're entering smp.c from mgmt.c when user space responds to authentication, in which case we still need our own code to call smp_failure(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:52 +03:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Add LE SC support for responding to Pairing Confirm PDU When LE SC is being used we should always respond to it by sending our local random number. This patch adds a convenience function for it which also contains a check for the pre-requisite public key exchange completion Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:36:38 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Add LE SC support for responding to Pairing Confirm PDU When LE SC is being used we should always respond to it by sending our local random number. This patch adds a convenience function for it which also contains a check for the pre-requisite public key exchange completion Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:36:38 +03:00
Bluetooth: Add workaround for broken OS X legacy SMP pairing OS X version 10.10.2 (and possibly older versions) doesn't support LE Secure Connections but incorrectly copies all authentication request bits from a Security Request to its Pairing Request. The result is that an SC capable initiator (such as BlueZ) will think OS X intends to do SC when in fact it's incapable of it: < ACL Data TX: Handle 3585 flags 0x00 dlen 6 SMP: Security Request (0x0b) len 1 Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) > ACL Data RX: Handle 3585 flags 0x02 dlen 11 SMP: Pairing Request (0x01) len 6 IO capability: KeyboardDisplay (0x04) OOB data: Authentication data not present (0x00) Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) Max encryption key size: 16 Initiator key distribution: EncKey (0x01) Responder key distribution: EncKey IdKey Sign (0x07) < ACL Data TX: Handle 3585 flags 0x00 dlen 11 SMP: Pairing Response (0x02) len 6 IO capability: NoInputNoOutput (0x03) OOB data: Authentication data not present (0x00) Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) Max encryption key size: 16 Initiator key distribution: EncKey (0x01) Responder key distribution: EncKey Sign (0x05) The pairing eventually fails when we get an unexpected Pairing Confirm PDU instead of a Public Key PDU: > ACL Data RX: Handle 3585 flags 0x02 dlen 21 SMP: Pairing Confirm (0x03) len 16 Confim value: bcc3bed31b8f313a78ec3cce32685faf It is only at this point that we can speculate that the remote doesn't really support SC. This patch creates a workaround for the just-works model, however the MITM case is unsolvable because the OS X user has already been requested to enter a PIN which we're now expected to randomly generate and show the user (i.e. a chicken-and-egg problem). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-15 19:34:04 +02:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Add SMP confirmation checks methods This patch includes support for generating and sending the random value used to produce the confirmation value. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:46 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Fix missing PDU length checks for SMP For each received SMP PDU we need to check that we have enough data to fit the specified size of the PDU. This patch adds the necessary checks for each SMP PDU handler and ensures that buffer overflows do not occur if to little data has been received. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:29 +02:00
Bluetooth: Add support for SMP Invalid Parameters error code The Invalid Parameters error code is used to indicate that the command length is invalid or that a parameter is outside of the specified range. This error code wasn't clearly specified in the Bluetooth 4.0 specification but since 4.1 this has been fixed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-08 14:19:11 +03:00
Bluetooth: Fix missing PDU length checks for SMP For each received SMP PDU we need to check that we have enough data to fit the specified size of the PDU. This patch adds the necessary checks for each SMP PDU handler and ensures that buffer overflows do not occur if to little data has been received. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:29 +02:00
Bluetooth: Move SMP fields to a separate structure The objective is to make the core to have as little as possible information about SMP procedures and logic. Now, all the SMP specific information is hidden from the core. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:30 -03:00
Bluetooth: Add SMP confirmation checks methods This patch includes support for generating and sending the random value used to produce the confirmation value. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:46 -03:00
Bluetooth: Add workaround for broken OS X legacy SMP pairing OS X version 10.10.2 (and possibly older versions) doesn't support LE Secure Connections but incorrectly copies all authentication request bits from a Security Request to its Pairing Request. The result is that an SC capable initiator (such as BlueZ) will think OS X intends to do SC when in fact it's incapable of it: < ACL Data TX: Handle 3585 flags 0x00 dlen 6 SMP: Security Request (0x0b) len 1 Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) > ACL Data RX: Handle 3585 flags 0x02 dlen 11 SMP: Pairing Request (0x01) len 6 IO capability: KeyboardDisplay (0x04) OOB data: Authentication data not present (0x00) Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) Max encryption key size: 16 Initiator key distribution: EncKey (0x01) Responder key distribution: EncKey IdKey Sign (0x07) < ACL Data TX: Handle 3585 flags 0x00 dlen 11 SMP: Pairing Response (0x02) len 6 IO capability: NoInputNoOutput (0x03) OOB data: Authentication data not present (0x00) Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) Max encryption key size: 16 Initiator key distribution: EncKey (0x01) Responder key distribution: EncKey Sign (0x05) The pairing eventually fails when we get an unexpected Pairing Confirm PDU instead of a Public Key PDU: > ACL Data RX: Handle 3585 flags 0x02 dlen 21 SMP: Pairing Confirm (0x03) len 16 Confim value: bcc3bed31b8f313a78ec3cce32685faf It is only at this point that we can speculate that the remote doesn't really support SC. This patch creates a workaround for the just-works model, however the MITM case is unsolvable because the OS X user has already been requested to enter a PIN which we're now expected to randomly generate and show the user (i.e. a chicken-and-egg problem). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-15 19:34:04 +02:00
Bluetooth: Add LE SC support for responding to Pairing Confirm PDU When LE SC is being used we should always respond to it by sending our local random number. This patch adds a convenience function for it which also contains a check for the pre-requisite public key exchange completion Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:36:38 +03:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Update smp_confirm to return a response code Now that smp_confirm() is called "inline" we can have it return a response code and have the sending of it be done in the shared place for command handlers. One exception is when we're entering smp.c from mgmt.c when user space responds to authentication, in which case we still need our own code to call smp_failure(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:52 +03:00
Bluetooth: Remove two else branches that are not needed The SMP code contains two else branches that are not needed since the successful test will actually leave the function. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-11 17:47:40 -07:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Add support for LE SC numeric comparison After the Pairing Confirm and Random PDUs have been exchanged in LE SC it's time to generate a numeric comparison value using a new smp_g2 cryptographic function (which also builds on AES-CMAC). This patch adds the smp_g2 implementation and updates the Pairing Random PDU handler to proceed with the value genration and user confirmation. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:39:49 +03:00
Bluetooth: Add SMP confirmation checks methods This patch includes support for generating and sending the random value used to produce the confirmation value. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:46 -03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Add SMP confirmation checks methods This patch includes support for generating and sending the random value used to produce the confirmation value. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:46 -03:00
Bluetooth: Fix missing PDU length checks for SMP For each received SMP PDU we need to check that we have enough data to fit the specified size of the PDU. This patch adds the necessary checks for each SMP PDU handler and ensures that buffer overflows do not occur if to little data has been received. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:29 +02:00
Bluetooth: Add support for SMP Invalid Parameters error code The Invalid Parameters error code is used to indicate that the command length is invalid or that a parameter is outside of the specified range. This error code wasn't clearly specified in the Bluetooth 4.0 specification but since 4.1 this has been fixed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-08 14:19:11 +03:00
Bluetooth: Fix missing PDU length checks for SMP For each received SMP PDU we need to check that we have enough data to fit the specified size of the PDU. This patch adds the necessary checks for each SMP PDU handler and ensures that buffer overflows do not occur if to little data has been received. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:29 +02:00
Bluetooth: Fix smp_e byte order to be consistent with SMP specification The SMP specification is written with the assumption that both key information, plaintextData and encryptedData follow the same little endian byte ordering as the rest of SMP. Since the kernel crypto routines expect big endian data the code has had to do various byte swapping tricks to make the behavior as expected, however the swapping has been scattered all around the place. This patch centralizes the byte order swapping into the smp_e function by making its public interface match what the other SMP functions expect as per specification. The benefit is vastly simplified calls to smp_e. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 12:58:24 +02:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Add support for LE SC numeric comparison After the Pairing Confirm and Random PDUs have been exchanged in LE SC it's time to generate a numeric comparison value using a new smp_g2 cryptographic function (which also builds on AES-CMAC). This patch adds the smp_g2 implementation and updates the Pairing Random PDU handler to proceed with the value genration and user confirmation. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:39:49 +03:00
Bluetooth: Fix false-positive "uninitialized" compiler warning Some gcc versions don't seem to be able to properly track the flow of the smp_cmd_pairing_random() function and end up causing the following types of (false-positive) warnings: smp.c:1995:6: warning: ‘nb’ may be used uninitialized in this function [-Wmaybe-uninitialized] err = smp_g2(smp->tfm_cmac, pkax, pkbx, na, nb, &passkey); smp.c:1995:6: warning: ‘na’ may be used uninitialized in this function [-Wmaybe-uninitialized] err = smp_g2(smp->tfm_cmac, pkax, pkbx, na, nb, &passkey); ^ smp.c:1995:6: warning: ‘pkbx’ may be used uninitialized in this function [-Wmaybe-uninitialized] err = smp_g2(smp->tfm_cmac, pkax, pkbx, na, nb, &passkey); ^ smp.c:1995:6: warning: ‘pkax’ may be used uninitialized in this function [-Wmaybe-uninitialized] err = smp_g2(smp->tfm_cmac, pkax, pkbx, na, nb, &passkey); This patch fixes the issue by moving the pkax/pkbx and na/nb initialization earlier in the function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-03 16:26:37 +02:00
Bluetooth: Add basic LE SC OOB support for remote OOB data This patch adds basic OOB pairing support when we've received the remote OOB data. This includes tracking the remote r value (in smp->rr) as well as doing the appropriate f4() call when needed. Previously the OOB rand would have been stored in smp->rrnd however these are actually two independent values so we need separate variables for them. Na/Nb in the spec maps to smp->prnd/rrnd and ra/rb maps to smp->rr with smp->pr to come once local OOB data is supported. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-28 15:17:05 +01:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Add support for LE SC numeric comparison After the Pairing Confirm and Random PDUs have been exchanged in LE SC it's time to generate a numeric comparison value using a new smp_g2 cryptographic function (which also builds on AES-CMAC). This patch adds the smp_g2 implementation and updates the Pairing Random PDU handler to proceed with the value genration and user confirmation. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:39:49 +03:00
Bluetooth: Add basic LE SC OOB support for remote OOB data This patch adds basic OOB pairing support when we've received the remote OOB data. This includes tracking the remote r value (in smp->rr) as well as doing the appropriate f4() call when needed. Previously the OOB rand would have been stored in smp->rrnd however these are actually two independent values so we need separate variables for them. Na/Nb in the spec maps to smp->prnd/rrnd and ra/rb maps to smp->rr with smp->pr to come once local OOB data is supported. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-28 15:17:05 +01:00
Bluetooth: Add support for handling LE SC user response With LE SC, once the user has responded to the numeric comparison it's time to send DHKey check values in both directions. The DHKey check value is generated using new smp_f5 and smp_f6 cryptographic functions. The smp_f5 function is responsible for generating the LTK and the MacKey values whereas the smp_f6 function takes the MacKey as input and generates the DHKey Check value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:44:05 +03:00
Bluetooth: Add basic LE SC OOB support for remote OOB data This patch adds basic OOB pairing support when we've received the remote OOB data. This includes tracking the remote r value (in smp->rr) as well as doing the appropriate f4() call when needed. Previously the OOB rand would have been stored in smp->rrnd however these are actually two independent values so we need separate variables for them. Na/Nb in the spec maps to smp->prnd/rrnd and ra/rb maps to smp->rr with smp->pr to come once local OOB data is supported. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-28 15:17:05 +01:00
Bluetooth: Add support for SC just-works pairing If the just-works method was chosen we shouldn't send anything to user space but simply proceed with sending the DHKey Check PDU. This patch adds the necessary code for it. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-01 15:38:09 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Add support for SC just-works pairing If the just-works method was chosen we shouldn't send anything to user space but simply proceed with sending the DHKey Check PDU. This patch adds the necessary code for it. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-01 15:38:09 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Add support for LE SC numeric comparison After the Pairing Confirm and Random PDUs have been exchanged in LE SC it's time to generate a numeric comparison value using a new smp_g2 cryptographic function (which also builds on AES-CMAC). This patch adds the smp_g2 implementation and updates the Pairing Random PDU handler to proceed with the value genration and user confirmation. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:39:49 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Add support for LE SC numeric comparison After the Pairing Confirm and Random PDUs have been exchanged in LE SC it's time to generate a numeric comparison value using a new smp_g2 cryptographic function (which also builds on AES-CMAC). This patch adds the smp_g2 implementation and updates the Pairing Random PDU handler to proceed with the value genration and user confirmation. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:39:49 +03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Use bool for smp_ltk_encrypt return value The return value of smp_ltk_encrypt is simple boolean, so just use bool and make the code a bit more readable. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-07-01 10:59:24 +02:00
Bluetooth: Use the LTK after receiving a LE Security Request When receiving a security request from the remote device we should find if there is already a LTK associated with the remote device, if found we should use it to encrypt the link. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-25 20:02:28 -03:00
Bluetooth: Use the updated key structures for handling LTKs This updates all the users of the older way, that was using the link_keys list to store the SMP keys, to use the new way. This includes defining new types for the keys, we have a type for each combination of STK/LTK and Master/Slave. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2012-02-02 21:08:01 -03:00
Bluetooth: Use the LTK after receiving a LE Security Request When receiving a security request from the remote device we should find if there is already a LTK associated with the remote device, if found we should use it to encrypt the link. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-25 20:02:28 -03:00
Bluetooth: Rename hci_find_ltk_by_addr to hci_find_ltk Now that hci_find_ltk_by_addr is the only LTK lookup function there's no need to keep the long name anymore. This patch shortens the function name to simply hci_find_ltk. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-29 15:02:59 +03:00
Bluetooth: Use the LTK after receiving a LE Security Request When receiving a security request from the remote device we should find if there is already a LTK associated with the remote device, if found we should use it to encrypt the link. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-25 20:02:28 -03:00
Bluetooth: Use bool for smp_ltk_encrypt return value The return value of smp_ltk_encrypt is simple boolean, so just use bool and make the code a bit more readable. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-07-01 10:59:24 +02:00
Bluetooth: Use the LTK after receiving a LE Security Request When receiving a security request from the remote device we should find if there is already a LTK associated with the remote device, if found we should use it to encrypt the link. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-25 20:02:28 -03:00
Bluetooth: Add smp_ltk_sec_level() helper function There are several places that need to determine the security level that an LTK can provide. This patch adds a convenience function for this to help make the code more readable. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:37:45 -07:00
Bluetooth: Use bool for smp_ltk_encrypt return value The return value of smp_ltk_encrypt is simple boolean, so just use bool and make the code a bit more readable. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-07-01 10:59:24 +02:00
Bluetooth: Fix SMP security elevation from medium to high If we have an unauthenticated key it is not sufficient to acheive high security. Therefore, when deciding whether to encrypt the link or request pairing, it is essential to in addition to checking the existence of a key to also check whether it is authenticated or not. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
2012-06-07 14:58:37 +08:00
Bluetooth: Rename conn->pend to conn->flags These flags can and will be used for more general purpose values than just pending state transitions so the more common name "flags" makes more sense than "pend". Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Acked-by: Marcel Holtmann <marcel@holtmann.org>
2012-01-16 06:10:31 +02:00
Bluetooth: Use bool for smp_ltk_encrypt return value The return value of smp_ltk_encrypt is simple boolean, so just use bool and make the code a bit more readable. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-07-01 10:59:24 +02:00
Bluetooth: Use the LTK after receiving a LE Security Request When receiving a security request from the remote device we should find if there is already a LTK associated with the remote device, if found we should use it to encrypt the link. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-25 20:02:28 -03:00
Bluetooth: Fix encryption key size handling for LTKs The encryption key size for LTKs is supposed to be applied only at the moment of encryption. When generating a Link Key (using LE SC) from the LTK the full non-shortened value should be used. This patch modifies the code to always keep the full value around and only apply the key size when passing the value to HCI. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-08 18:14:39 +03:00
Bluetooth: Use the updated key structures for handling LTKs This updates all the users of the older way, that was using the link_keys list to store the SMP keys, to use the new way. This includes defining new types for the keys, we have a type for each combination of STK/LTK and Master/Slave. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2012-02-02 21:08:01 -03:00
Bluetooth: Use the LTK after receiving a LE Security Request When receiving a security request from the remote device we should find if there is already a LTK associated with the remote device, if found we should use it to encrypt the link. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-25 20:02:28 -03:00
Bluetooth: Add flag to track STK encryption There are certain subtle differences in behavior when we're encrypted with the STK, such as allowing re-encryption even though the security level stays the same. Because of this, add a flag to track whether we're encrypted with an STK or not. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-01 19:14:12 +03:00
Bluetooth: Use bool for smp_ltk_encrypt return value The return value of smp_ltk_encrypt is simple boolean, so just use bool and make the code a bit more readable. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-07-01 10:59:24 +02:00
Bluetooth: Use the LTK after receiving a LE Security Request When receiving a security request from the remote device we should find if there is already a LTK associated with the remote device, if found we should use it to encrypt the link. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-25 20:02:28 -03:00
Bluetooth: Fix coding style violations in SMP handling The SMP source code has a few coding style violations. Fix them up all at once. No actual code has changed. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-10-13 05:43:25 -07:00
Bluetooth: Add key preference parameter to smp_sufficient_security So far smp_sufficient_security() has returned false if we're encrypted with an STK but do have an LTK available. However, for the sake of LE CoC servers we do want to let the incoming connection through even though we're only encrypted with the STK. This patch adds a key preference parameter to smp_sufficient_security() with two possible values (enum used instead of bool for readability). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-11-13 10:55:18 +02:00
Bluetooth: Fix redundant encryption when receiving Security Request If we're already encrypted with a good enough LTK we should just ignore an incoming SMP Security Request. The code was already taking care of this in the smp_conn_security function before calling smp_ltk_encrypt but failed to do the same in smp_cmd_security_req. This patch fixes the issue by moving up the smp_sufficient_security function and using it in the Security Request handler before trying to request encryption. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-01 18:40:20 +03:00
Bluetooth: Add key preference parameter to smp_sufficient_security So far smp_sufficient_security() has returned false if we're encrypted with an STK but do have an LTK available. However, for the sake of LE CoC servers we do want to let the incoming connection through even though we're only encrypted with the STK. This patch adds a key preference parameter to smp_sufficient_security() with two possible values (enum used instead of bool for readability). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-11-13 10:55:18 +02:00
Bluetooth: Allow re-encryption with LTK when STK is in use If we're encrypted with the STK we should allow re-encryption with an LTK even though the achieved security level is the same. This patch adds the necessary logic to the smp_sufficient_security function which is used to determine whether to proceed with encryption or not. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-01 19:14:13 +03:00
Bluetooth: Add key preference parameter to smp_sufficient_security So far smp_sufficient_security() has returned false if we're encrypted with an STK but do have an LTK available. However, for the sake of LE CoC servers we do want to let the incoming connection through even though we're only encrypted with the STK. This patch adds a key preference parameter to smp_sufficient_security() with two possible values (enum used instead of bool for readability). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-11-13 10:55:18 +02:00
Bluetooth: Rename hci_find_ltk_by_addr to hci_find_ltk Now that hci_find_ltk_by_addr is the only LTK lookup function there's no need to keep the long name anymore. This patch shortens the function name to simply hci_find_ltk. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-29 15:02:59 +03:00
Bluetooth: Allow re-encryption with LTK when STK is in use If we're encrypted with the STK we should allow re-encryption with an LTK even though the achieved security level is the same. This patch adds the necessary logic to the smp_sufficient_security function which is used to determine whether to proceed with encryption or not. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-01 19:14:13 +03:00
Bluetooth: Fix redundant encryption when receiving Security Request If we're already encrypted with a good enough LTK we should just ignore an incoming SMP Security Request. The code was already taking care of this in the smp_conn_security function before calling smp_ltk_encrypt but failed to do the same in smp_cmd_security_req. This patch fixes the issue by moving up the smp_sufficient_security function and using it in the Security Request handler before trying to request encryption. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-01 18:40:20 +03:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Add support for resuming socket when SMP is finished This adds support for resuming the user space traffic when SMP negotiation is complete. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-01-26 21:42:57 -03:00
Bluetooth: Make auth_req mask dependent on SC enabled or not If we haven't enabled SC support on our side we should use the same mask for the authentication requirement as we were using before SC support was added, otherwise we should use the extended mask for SC. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-26 13:29:28 +03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Fix ignoring unknown SMP authentication requirement bits The SMP specification states that we should ignore any unknown bits from the authentication requirement. We already have a define for masking out unknown bits but we haven't used it in all places so far. This patch adds usage of the AUTH_REQ_MASK to all places that need it and ensures that we don't pass unknown bits onward to other functions. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:37:42 -07:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Fix missing PDU length checks for SMP For each received SMP PDU we need to check that we have enough data to fit the specified size of the PDU. This patch adds the necessary checks for each SMP PDU handler and ensures that buffer overflows do not occur if to little data has been received. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:29 +02:00
Bluetooth: Add support for SMP Invalid Parameters error code The Invalid Parameters error code is used to indicate that the command length is invalid or that a parameter is outside of the specified range. This error code wasn't clearly specified in the Bluetooth 4.0 specification but since 4.1 this has been fixed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-08 14:19:11 +03:00
Bluetooth: Fix missing PDU length checks for SMP For each received SMP PDU we need to check that we have enough data to fit the specified size of the PDU. This patch adds the necessary checks for each SMP PDU handler and ensures that buffer overflows do not occur if to little data has been received. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:29 +02:00
Bluetooth: Convert HCI_CONN_MASTER flag to a conn->role variable Having a dedicated u8 role variable in the hci_conn struct greatly simplifies tracking of the role, since this is the native way that it's represented on the HCI level. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-16 11:42:27 +03:00
Bluetooth: Fix rejecting SMP security request in slave role The SMP security request is for a slave role device to request the master role device to initiate a pairing request. If we receive this command while we're in the slave role we should reject it appropriately. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-11-05 11:30:39 +02:00
Bluetooth: Make auth_req mask dependent on SC enabled or not If we haven't enabled SC support on our side we should use the same mask for the authentication requirement as we were using before SC support was added, otherwise we should use the extended mask for SC. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-26 13:29:28 +03:00
Bluetooth: Fix ignoring unknown SMP authentication requirement bits The SMP specification states that we should ignore any unknown bits from the authentication requirement. We already have a define for masking out unknown bits but we haven't used it in all places so far. This patch adds usage of the AUTH_REQ_MASK to all places that need it and ensures that we don't pass unknown bits onward to other functions. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:37:42 -07:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Add SC-only mode support for SMP When Secure Connections-only mode is enabled we should reject any pairing command that does not have Secure Connections set in the authentication requirements. This patch adds the appropriate logic for this to the command handlers of Pairing Request/Response and Security Request. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-08 16:59:18 -07:00
Bluetooth: Avoid hard-coded IO capability values in SMP This is a trivial change to use a proper define for the NoInputNoOutput IO capability instead of hard-coded values. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:58:54 -07:00
Bluetooth: Fix SMP security level when we have no IO capabilities When the local IO capability is NoInputNoOutput any attempt to convert the remote authentication requirement to a target security level is futile. This patch makes sure that we set the target security level at most to MEDIUM if the local IO capability is NoInputNoOutput. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:37:44 -07:00
Bluetooth: Add key preference parameter to smp_sufficient_security So far smp_sufficient_security() has returned false if we're encrypted with an STK but do have an LTK available. However, for the sake of LE CoC servers we do want to let the incoming connection through even though we're only encrypted with the STK. This patch adds a key preference parameter to smp_sufficient_security() with two possible values (enum used instead of bool for readability). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-11-13 10:55:18 +02:00
Bluetooth: Fix redundant encryption when receiving Security Request If we're already encrypted with a good enough LTK we should just ignore an incoming SMP Security Request. The code was already taking care of this in the smp_conn_security function before calling smp_ltk_encrypt but failed to do the same in smp_cmd_security_req. This patch fixes the issue by moving up the smp_sufficient_security function and using it in the Security Request handler before trying to request encryption. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-01 18:40:20 +03:00
Bluetooth: Fix overriding higher security level in SMP When we receive a pairing request or an internal request to start pairing we shouldn't blindly overwrite the existing pending_sec_level value as that may actually be higher than the new one. This patch fixes the SMP code to only overwrite the value in case the new one is higher than the old. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-17 13:07:37 +03:00
Bluetooth: Fix not setting a pending security level For slave initiated security, we should set a default security level, for now BT_SECURITY_MEDIUM. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-25 20:02:35 -03:00
Bluetooth: Fix SMP security elevation from medium to high If we have an unauthenticated key it is not sufficient to acheive high security. Therefore, when deciding whether to encrypt the link or request pairing, it is essential to in addition to checking the existence of a key to also check whether it is authenticated or not. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
2012-06-07 14:58:37 +08:00
Bluetooth: Use the LTK after receiving a LE Security Request When receiving a security request from the remote device we should find if there is already a LTK associated with the remote device, if found we should use it to encrypt the link. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-25 20:02:28 -03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Fix missing NULL check for smp_chan_create() return value The smp_chan_create function may return NULL, e.g. in the case of memory allocation failure, so we always need to check for this. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-16 19:25:14 +03:00
Bluetooth: Add a flag to indicate that SMP is going on Add HCI_CONN_LE_SMP_PEND flag to indicate that SMP is pending for that connection. This allows to have information that an SMP procedure is going on for that connection. We use the HCI_CONN_ENCRYPT_PEND to indicate that encryption (HCI_LE_Start_Encryption) is pending for that connection. While a SMP procedure is going on we hold an reference to the connection, to avoid disconnections. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-19 21:06:51 -03:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Fix ignoring unknown SMP authentication requirement bits The SMP specification states that we should ignore any unknown bits from the authentication requirement. We already have a define for masking out unknown bits but we haven't used it in all places so far. This patch adds usage of the AUTH_REQ_MASK to all places that need it and ensures that we don't pass unknown bits onward to other functions. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:37:42 -07:00
Bluetooth: Fix SMP context tracking leading to a kernel crash The HCI_CONN_LE_SMP_PEND flag is supposed to indicate whether we have an SMP context or not. If the context creation fails, or some other error is indicated between setting the flag and creating the context the flag must be cleared first. This patch ensures that smp_chan_create() clears the flag in case of allocation failure as well as reorders code in smp_cmd_security_req() that could lead to returning an error between setting the flag and creating the context. Without the patch the following kind of kernel crash could be observed (this one because of unacceptable authentication requirements in a Security Request): [ +0.000855] kernel BUG at net/bluetooth/smp.c:606! [ +0.000000] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ +0.000000] CPU: 0 PID: 58 Comm: kworker/u5:2 Tainted: G W 3.16.0-rc1+ #785 [ +0.008391] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ +0.000000] Workqueue: hci0 hci_rx_work [ +0.000000] task: f4dc8f90 ti: f4ef0000 task.ti: f4ef0000 [ +0.000000] EIP: 0060:[<c13432b6>] EFLAGS: 00010246 CPU: 0 [ +0.000000] EIP is at smp_chan_destroy+0x1e/0x145 [ +0.000709] EAX: f46db870 EBX: 00000000 ECX: 00000000 EDX: 00000005 [ +0.000000] ESI: f46db870 EDI: f46db870 EBP: f4ef1dc0 ESP: f4ef1db0 [ +0.000000] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [ +0.000000] CR0: 8005003b CR2: b666b0b0 CR3: 00022000 CR4: 00000690 [ +0.000000] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ +0.000000] DR6: fffe0ff0 DR7: 00000400 [ +0.000000] Stack: [ +0.000000] 00000005 f17b7840 f46db870 f4ef1dd4 f4ef1de4 c1343441 c134342e 00000000 [ +0.000000] c1343441 00000005 00000002 00000000 f17b7840 f4ef1e38 c134452a 00002aae [ +0.000000] 01ef1e00 00002aae f46bd980 f46db870 00000039 ffffffff 00000007 f4ef1e34 [ +0.000000] Call Trace: [ +0.000000] [<c1343441>] smp_failure+0x64/0x6c [ +0.000000] [<c134342e>] ? smp_failure+0x51/0x6c [ +0.000000] [<c1343441>] ? smp_failure+0x64/0x6c [ +0.000000] [<c134452a>] smp_sig_channel+0xad6/0xafc [ +0.000000] [<c1053b61>] ? vprintk_emit+0x343/0x366 [ +0.000000] [<c133f34e>] l2cap_recv_frame+0x1337/0x1ac4 [ +0.000000] [<c133f34e>] ? l2cap_recv_frame+0x1337/0x1ac4 [ +0.000000] [<c1172307>] ? __dynamic_pr_debug+0x3e/0x40 [ +0.000000] [<c11702a1>] ? debug_smp_processor_id+0x12/0x14 [ +0.000000] [<c1340bc9>] l2cap_recv_acldata+0xe8/0x239 [ +0.000000] [<c1340bc9>] ? l2cap_recv_acldata+0xe8/0x239 [ +0.000000] [<c1169931>] ? __const_udelay+0x1a/0x1c [ +0.000000] [<c131f120>] hci_rx_work+0x1a1/0x286 [ +0.000000] [<c137244e>] ? mutex_unlock+0x8/0xa [ +0.000000] [<c131f120>] ? hci_rx_work+0x1a1/0x286 [ +0.000000] [<c1038fe5>] process_one_work+0x128/0x1df [ +0.000000] [<c1038fe5>] ? process_one_work+0x128/0x1df [ +0.000000] [<c10392df>] worker_thread+0x222/0x2de [ +0.000000] [<c10390bd>] ? process_scheduled_works+0x21/0x21 [ +0.000000] [<c103d34c>] kthread+0x82/0x87 [ +0.000000] [<c1040000>] ? create_new_namespaces+0x90/0x105 [ +0.000000] [<c13738e1>] ret_from_kernel_thread+0x21/0x30 [ +0.000000] [<c103d2ca>] ? __kthread_parkme+0x50/0x50 [ +0.000000] Code: 65 f4 89 f0 5b 5e 5f 5d 8d 67 f8 5f c3 57 8d 7c 24 08 83 e4 f8 ff 77 fc 55 89 e5 57 89 c7 56 53 52 8b 98 e0 00 00 00 85 db 75 02 <0f> 0b 8b b3 80 00 00 00 8b 00 c1 ee 03 83 e6 01 89 f2 e8 ef 09 [ +0.000000] EIP: [<c13432b6>] smp_chan_destroy+0x1e/0x145 SS:ESP 0068:f4ef1db0 Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-29 14:18:48 +03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Fix ignoring unknown SMP authentication requirement bits The SMP specification states that we should ignore any unknown bits from the authentication requirement. We already have a define for masking out unknown bits but we haven't used it in all places so far. This patch adds usage of the AUTH_REQ_MASK to all places that need it and ensures that we don't pass unknown bits onward to other functions. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:37:42 -07:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Move SMP fields to a separate structure The objective is to make the core to have as little as possible information about SMP procedures and logic. Now, all the SMP specific information is hidden from the core. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:30 -03:00
Bluetooth: Add SMP confirmation structs This patch adds initial support for verifying the confirmation value that the remote side has sent. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:45 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Add support for resuming socket when SMP is finished This adds support for resuming the user space traffic when SMP negotiation is complete. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-01-26 21:42:57 -03:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Change signature of smp_conn_security() To make it clear that it may be called from contexts that may not have any knowledge of L2CAP, we change the connection parameter, to receive a hci_conn. This also makes it clear that it is checking the security of the link. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
2012-08-23 21:32:43 -03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Change signature of smp_conn_security() To make it clear that it may be called from contexts that may not have any knowledge of L2CAP, we change the connection parameter, to receive a hci_conn. This also makes it clear that it is checking the security of the link. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
2012-08-23 21:32:43 -03:00
Bluetooth: Fix dereferencing conn variable before NULL check This patch fixes the following type of static analyzer warning (and probably a real bug as well as the NULL check should be there for a reason): net/bluetooth/smp.c:1182 smp_conn_security() warn: variable dereferenced before check 'conn' (see line 1174) Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-06 06:59:10 +03:00
Bluetooth: Fix potential NULL pointer dereference in SMP If a sudden disconnection happens the l2cap_conn pointer may already have been cleaned up by the time hci_conn_security gets called, resulting in the following oops if we don't have a proper NULL check: BUG: unable to handle kernel NULL pointer dereference at 000000c8 IP: [<c132e2ed>] smp_conn_security+0x26/0x151 *pde = 00000000 Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC CPU: 1 PID: 673 Comm: memcheck-x86-li Not tainted 3.14.0-rc2+ #437 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 task: f0ef0520 ti: f0d6a000 task.ti: f0d6a000 EIP: 0060:[<c132e2ed>] EFLAGS: 00010246 CPU: 1 EIP is at smp_conn_security+0x26/0x151 EAX: f0ec1770 EBX: f0ec1770 ECX: 00000002 EDX: 00000002 ESI: 00000002 EDI: 00000000 EBP: f0d6bdc0 ESP: f0d6bda0 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 CR0: 80050033 CR2: 000000c8 CR3: 30f0f000 CR4: 00000690 Stack: f4f55000 00000002 f0d6bdcc c1097a2b c1319f40 f0ec1770 00000002 f0d6bdd0 f0d6bde8 c1312a82 f0d6bdfc c1312a82 c1319f84 00000008 f4d81c20 f0e5fd86 f0ec1770 f0d6bdfc f0d6be28 c131be3b c131bdc1 f0d25270 c131be3b 00000008 Call Trace: [<c1097a2b>] ? __kmalloc+0x118/0x128 [<c1319f40>] ? mgmt_pending_add+0x49/0x9b [<c1312a82>] hci_conn_security+0x4a/0x1dd [<c1312a82>] ? hci_conn_security+0x4a/0x1dd [<c1319f84>] ? mgmt_pending_add+0x8d/0x9b [<c131be3b>] pair_device+0x1e1/0x206 [<c131bdc1>] ? pair_device+0x167/0x206 [<c131be3b>] ? pair_device+0x1e1/0x206 [<c131ed44>] mgmt_control+0x275/0x2d6 Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 14:39:03 +02:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add support for using the crypto subsystem This will allow using the crypto subsystem for encrypting data. As SMP (Security Manager Protocol) is implemented almost entirely on the host side and the crypto module already implements the needed methods (AES-128), it makes sense to use it. There's now a new module option to enable/disable SMP support. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:43 -03:00
Bluetooth: Fix potential NULL pointer dereference in SMP If a sudden disconnection happens the l2cap_conn pointer may already have been cleaned up by the time hci_conn_security gets called, resulting in the following oops if we don't have a proper NULL check: BUG: unable to handle kernel NULL pointer dereference at 000000c8 IP: [<c132e2ed>] smp_conn_security+0x26/0x151 *pde = 00000000 Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC CPU: 1 PID: 673 Comm: memcheck-x86-li Not tainted 3.14.0-rc2+ #437 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 task: f0ef0520 ti: f0d6a000 task.ti: f0d6a000 EIP: 0060:[<c132e2ed>] EFLAGS: 00010246 CPU: 1 EIP is at smp_conn_security+0x26/0x151 EAX: f0ec1770 EBX: f0ec1770 ECX: 00000002 EDX: 00000002 ESI: 00000002 EDI: 00000000 EBP: f0d6bdc0 ESP: f0d6bda0 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 CR0: 80050033 CR2: 000000c8 CR3: 30f0f000 CR4: 00000690 Stack: f4f55000 00000002 f0d6bdcc c1097a2b c1319f40 f0ec1770 00000002 f0d6bdd0 f0d6bde8 c1312a82 f0d6bdfc c1312a82 c1319f84 00000008 f4d81c20 f0e5fd86 f0ec1770 f0d6bdfc f0d6be28 c131be3b c131bdc1 f0d25270 c131be3b 00000008 Call Trace: [<c1097a2b>] ? __kmalloc+0x118/0x128 [<c1319f40>] ? mgmt_pending_add+0x49/0x9b [<c1312a82>] hci_conn_security+0x4a/0x1dd [<c1312a82>] ? hci_conn_security+0x4a/0x1dd [<c1319f84>] ? mgmt_pending_add+0x8d/0x9b [<c131be3b>] pair_device+0x1e1/0x206 [<c131bdc1>] ? pair_device+0x167/0x206 [<c131be3b>] ? pair_device+0x1e1/0x206 [<c131ed44>] mgmt_control+0x275/0x2d6 Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 14:39:03 +02:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Remove enable_smp parameter The enable_smp parameter is no longer needed. It can be replaced by checking lmp_host_le_capable. Signed-off-by: Andre Guedes <andre.guedes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-30 19:20:56 -03:00
Bluetooth: Add key preference parameter to smp_sufficient_security So far smp_sufficient_security() has returned false if we're encrypted with an STK but do have an LTK available. However, for the sake of LE CoC servers we do want to let the incoming connection through even though we're only encrypted with the STK. This patch adds a key preference parameter to smp_sufficient_security() with two possible values (enum used instead of bool for readability). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-11-13 10:55:18 +02:00
Bluetooth: Add support for resuming socket when SMP is finished This adds support for resuming the user space traffic when SMP negotiation is complete. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-01-26 21:42:57 -03:00
Bluetooth: Fix overriding higher security level in SMP When we receive a pairing request or an internal request to start pairing we shouldn't blindly overwrite the existing pending_sec_level value as that may actually be higher than the new one. This patch fixes the SMP code to only overwrite the value in case the new one is higher than the old. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-17 13:07:37 +03:00
Bluetooth: Convert HCI_CONN_MASTER flag to a conn->role variable Having a dedicated u8 role variable in the hci_conn struct greatly simplifies tracking of the role, since this is the native way that it's represented on the HCI level. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-16 11:42:27 +03:00
Bluetooth: Fix overriding higher security level in SMP When we receive a pairing request or an internal request to start pairing we shouldn't blindly overwrite the existing pending_sec_level value as that may actually be higher than the new one. This patch fixes the SMP code to only overwrite the value in case the new one is higher than the old. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-17 13:07:37 +03:00
Bluetooth: Add a flag to indicate that SMP is going on Add HCI_CONN_LE_SMP_PEND flag to indicate that SMP is pending for that connection. This allows to have information that an SMP procedure is going on for that connection. We use the HCI_CONN_ENCRYPT_PEND to indicate that encryption (HCI_LE_Start_Encryption) is pending for that connection. While a SMP procedure is going on we hold an reference to the connection, to avoid disconnections. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-19 21:06:51 -03:00
Bluetooth: Delay check for conn->smp in smp_conn_security() There are several actions that smp_conn_security() might make that do not require a valid SMP context (conn->smp pointer). One of these actions is to encrypt the link with an existing LTK. If the SMP context wasn't initialized properly we should still allow the independent actions to be done, i.e. the check for the context should only be done at the last possible moment. Reported-by: Chuck Ebbert <cebbert.lkml@gmail.com> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org # 4.0+
2015-09-04 12:22:46 +03:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Add a flag to indicate that SMP is going on Add HCI_CONN_LE_SMP_PEND flag to indicate that SMP is pending for that connection. This allows to have information that an SMP procedure is going on for that connection. We use the HCI_CONN_ENCRYPT_PEND to indicate that encryption (HCI_LE_Start_Encryption) is pending for that connection. While a SMP procedure is going on we hold an reference to the connection, to avoid disconnections. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-19 21:06:51 -03:00
Bluetooth: Move SMP crypto functions to a workqueue The function crypto_blkcipher_setkey() called by smp_e() can sleep, so all the crypto work has to be moved to hci_dev workqueue. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:31 -03:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Add a flag to indicate that SMP is going on Add HCI_CONN_LE_SMP_PEND flag to indicate that SMP is pending for that connection. This allows to have information that an SMP procedure is going on for that connection. We use the HCI_CONN_ENCRYPT_PEND to indicate that encryption (HCI_LE_Start_Encryption) is pending for that connection. While a SMP procedure is going on we hold an reference to the connection, to avoid disconnections. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-19 21:06:51 -03:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Update SMP security level to/from auth_req for SC This patch updates the functions which map the SMP authentication request to a security level and vice-versa to take into account the Secure Connections feature. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-16 10:59:06 +03:00
Bluetooth: Fix requiring SMP MITM for outgoing connections Due to recent changes to the way that the MITM requirement is set for outgoing pairing attempts we can no longer rely on the hcon->auth_type variable (which is actually good since it was formed from BR/EDR concepts that don't really exist for SMP). To match the logic that BR/EDR now uses simply rely on the local IO capability and/or needed security level to set the MITM requirement for outgoing pairing requests. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org
2014-06-01 09:45:24 +03:00
Bluetooth: Fix MITM flag when initiating SMP pairing The pairing process initiated through mgmt sets the conn->auth_type value regardless of BR/EDR or LE pairing. This value will contain the MITM flag if the local IO capability allows it. When sending the SMP pairing request we should check the value and ensure that the MITM bit gets correctly set in the bonding flags. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 15:42:30 +02:00
Bluetooth: Fix requiring SMP MITM for outgoing connections Due to recent changes to the way that the MITM requirement is set for outgoing pairing attempts we can no longer rely on the hcon->auth_type variable (which is actually good since it was formed from BR/EDR concepts that don't really exist for SMP). To match the logic that BR/EDR now uses simply rely on the local IO capability and/or needed security level to set the MITM requirement for outgoing pairing requests. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org
2014-06-01 09:45:24 +03:00
Bluetooth: Fix overriding higher security level in SMP When we receive a pairing request or an internal request to start pairing we shouldn't blindly overwrite the existing pending_sec_level value as that may actually be higher than the new one. This patch fixes the SMP code to only overwrite the value in case the new one is higher than the old. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-17 13:07:37 +03:00
Bluetooth: Fix MITM flag when initiating SMP pairing The pairing process initiated through mgmt sets the conn->auth_type value regardless of BR/EDR or LE pairing. This value will contain the MITM flag if the local IO capability allows it. When sending the SMP pairing request we should check the value and ensure that the MITM bit gets correctly set in the bonding flags. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 15:42:30 +02:00
Bluetooth: Convert HCI_CONN_MASTER flag to a conn->role variable Having a dedicated u8 role variable in the hci_conn struct greatly simplifies tracking of the role, since this is the native way that it's represented on the HCI level. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-16 11:42:27 +03:00
Bluetooth: Add a flag to indicate that SMP is going on Add HCI_CONN_LE_SMP_PEND flag to indicate that SMP is pending for that connection. This allows to have information that an SMP procedure is going on for that connection. We use the HCI_CONN_ENCRYPT_PEND to indicate that encryption (HCI_LE_Start_Encryption) is pending for that connection. While a SMP procedure is going on we hold an reference to the connection, to avoid disconnections. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-08-19 21:06:51 -03:00
Bluetooth: Add SMP confirmation structs This patch adds initial support for verifying the confirmation value that the remote side has sent. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:45 -03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Move SMP fields to a separate structure The objective is to make the core to have as little as possible information about SMP procedures and logic. Now, all the SMP specific information is hidden from the core. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:30 -03:00
Bluetooth: Add SMP confirmation structs This patch adds initial support for verifying the confirmation value that the remote side has sent. Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:45 -03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add MITM mechanism to LE-SMP To achive Man-In-The-Middle (MITM) level security with Low Energy, we have to enable User Passkey Comparison. This commit modifies the hard-coded JUST-WORKS pairing mechanism to support query via the MGMT interface of Passkey comparison and User Confirmation. Signed-off-by: Brian Gix <bgix@codeaurora.org> Acked-by: Marcel Holtmann<marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-21 16:12:12 -08:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Rename smp->smp_flags to smp->flags There's no reason to have "smp" in this variable name since it is already part of the SMP struct which provides sufficient context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-20 09:45:50 +03:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Add SMP flag to track which side is the initiator For remotely initiated just-works pairings we want to show the user a confirmation dialog for the pairing. However, we can only know which side was the initiator by tracking which side sends the first Security Request or Pairing Request PDU. This patch adds a new SMP flag to indicate whether our side was the initiator for the pairing. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 15:54:11 +02:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Fix crash in SMP when unpairing When unpairing the keys stored in hci_dev are removed. If SMP is ongoing the SMP context will also have references to these keys, so removing them from the hci_dev lists will make the pointers invalid. This can result in the following type of crashes: BUG: unable to handle kernel paging request at 6b6b6b6b IP: [<c11f26be>] __list_del_entry+0x44/0x71 *pde = 00000000 Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC Modules linked in: hci_uart btqca btusb btintel btbcm btrtl hci_vhci rfcomm bluetooth_6lowpan bluetooth CPU: 0 PID: 723 Comm: kworker/u5:0 Not tainted 4.3.0-rc3+ #1379 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.8.1-20150318_183358- 04/01/2014 Workqueue: hci0 hci_rx_work [bluetooth] task: f19da940 ti: f1a94000 task.ti: f1a94000 EIP: 0060:[<c11f26be>] EFLAGS: 00010202 CPU: 0 EIP is at __list_del_entry+0x44/0x71 EAX: c0088d20 EBX: f30fcac0 ECX: 6b6b6b6b EDX: 6b6b6b6b ESI: f4b60000 EDI: c0088d20 EBP: f1a95d90 ESP: f1a95d8c DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 CR0: 8005003b CR2: 6b6b6b6b CR3: 319e5000 CR4: 00000690 Stack: f30fcac0 f1a95db0 f82dc3e1 f1bfc000 00000000 c106524f f1bfc000 f30fd020 f1a95dc0 f1a95dd0 f82dcbdb f1a95de0 f82dcbdb 00000067 f1bfc000 f30fd020 f1a95de0 f1a95df0 f82d1126 00000067 f82d1126 00000006 f30fd020 f1bfc000 Call Trace: [<f82dc3e1>] smp_chan_destroy+0x192/0x240 [bluetooth] [<c106524f>] ? trace_hardirqs_on_caller+0x14e/0x169 [<f82dcbdb>] smp_teardown_cb+0x47/0x64 [bluetooth] [<f82dcbdb>] ? smp_teardown_cb+0x47/0x64 [bluetooth] [<f82d1126>] l2cap_chan_del+0x5d/0x14d [bluetooth] [<f82d1126>] ? l2cap_chan_del+0x5d/0x14d [bluetooth] [<f82d40ef>] l2cap_conn_del+0x109/0x17b [bluetooth] [<f82d40ef>] ? l2cap_conn_del+0x109/0x17b [bluetooth] [<f82c0205>] ? hci_event_packet+0x5b1/0x2092 [bluetooth] [<f82d41aa>] l2cap_disconn_cfm+0x49/0x50 [bluetooth] [<f82d41aa>] ? l2cap_disconn_cfm+0x49/0x50 [bluetooth] [<f82c0228>] hci_event_packet+0x5d4/0x2092 [bluetooth] [<c1332c16>] ? skb_release_data+0x6a/0x95 [<f82ce5d4>] ? hci_send_to_monitor+0xe7/0xf4 [bluetooth] [<c1409708>] ? _raw_spin_unlock_irqrestore+0x44/0x57 [<f82b3bb0>] hci_rx_work+0xf1/0x28b [bluetooth] [<f82b3bb0>] ? hci_rx_work+0xf1/0x28b [bluetooth] [<c10635a0>] ? __lock_is_held+0x2e/0x44 [<c104772e>] process_one_work+0x232/0x432 [<c1071ddc>] ? rcu_read_lock_sched_held+0x50/0x5a [<c104772e>] ? process_one_work+0x232/0x432 [<c1047d48>] worker_thread+0x1b8/0x255 [<c1047b90>] ? rescuer_thread+0x23c/0x23c [<c104bb71>] kthread+0x91/0x96 [<c14096a7>] ? _raw_spin_unlock_irq+0x27/0x44 [<c1409d61>] ret_from_kernel_thread+0x21/0x30 [<c104bae0>] ? kthread_parkme+0x1e/0x1e To solve the issue, introduce a new smp_cancel_pairing() API that can be used to clean up the SMP state before touching the hci_dev lists. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-22 09:38:35 +03:00
Bluetooth: Add support for SMP phase 3 (key distribution) This adds support for generating and distributing all the keys specified in the third phase of SMP. This will make possible to re-establish secure connections, resolve private addresses and sign commands. For now, the values generated are random. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:34 -03:00
Bluetooth: Add support for storing the LTK Now when the LTK is received from the remote or generated it is stored, so it can later be used. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:39 -03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Add support for storing the LTK Now when the LTK is received from the remote or generated it is stored, so it can later be used. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:39 -03:00
Bluetooth: Fix missing PDU length checks for SMP For each received SMP PDU we need to check that we have enough data to fit the specified size of the PDU. This patch adds the necessary checks for each SMP PDU handler and ensures that buffer overflows do not occur if to little data has been received. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:29 +02:00
Bluetooth: Add support for SMP Invalid Parameters error code The Invalid Parameters error code is used to indicate that the command length is invalid or that a parameter is outside of the specified range. This error code wasn't clearly specified in the Bluetooth 4.0 specification but since 4.1 this has been fixed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-08 14:19:11 +03:00
Bluetooth: Fix missing PDU length checks for SMP For each received SMP PDU we need to check that we have enough data to fit the specified size of the PDU. This patch adds the necessary checks for each SMP PDU handler and ensures that buffer overflows do not occur if to little data has been received. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:29 +02:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Fix properly ignoring unexpected SMP PDUs If we didn't request certain pieces of information during the key distribution negotiation we should properly ignore those PDUs if the peer incorrectly sends them. This includes the Encryption Information and Master Identification PDUs if the EncKey bit was not set, and the Identity Information and Identity Address Information PDUs if the IdKey bit was not set. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:37 +02:00
Bluetooth: Add support for storing the LTK Now when the LTK is received from the remote or generated it is stored, so it can later be used. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:39 -03:00
Bluetooth: Move SMP fields to a separate structure The objective is to make the core to have as little as possible information about SMP procedures and logic. Now, all the SMP specific information is hidden from the core. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-09-05 14:31:30 -03:00
Bluetooth: Add support for storing the LTK Now when the LTK is received from the remote or generated it is stored, so it can later be used. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:39 -03:00
Bluetooth: Add support for SMP phase 3 (key distribution) This adds support for generating and distributing all the keys specified in the third phase of SMP. This will make possible to re-establish secure connections, resolve private addresses and sign commands. For now, the values generated are random. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:34 -03:00
Bluetooth: Add support for storing the LTK Now when the LTK is received from the remote or generated it is stored, so it can later be used. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:39 -03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Use the updated key structures for handling LTKs This updates all the users of the older way, that was using the link_keys list to store the SMP keys, to use the new way. This includes defining new types for the keys, we have a type for each combination of STK/LTK and Master/Slave. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2012-02-02 21:08:01 -03:00
Bluetooth: Track SMP keys in the SMP context As preparation to do mgmt notification in a single place at the end of the key distribution, store the keys that need to be notified within the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-19 14:57:46 +02:00
Bluetooth: Use the updated key structures for handling LTKs This updates all the users of the older way, that was using the link_keys list to store the SMP keys, to use the new way. This includes defining new types for the keys, we have a type for each combination of STK/LTK and Master/Slave. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2012-02-02 21:08:01 -03:00
Bluetooth: Add support for SMP phase 3 (key distribution) This adds support for generating and distributing all the keys specified in the third phase of SMP. This will make possible to re-establish secure connections, resolve private addresses and sign commands. For now, the values generated are random. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:34 -03:00
Bluetooth: Fix missing PDU length checks for SMP For each received SMP PDU we need to check that we have enough data to fit the specified size of the PDU. This patch adds the necessary checks for each SMP PDU handler and ensures that buffer overflows do not occur if to little data has been received. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:29 +02:00
Bluetooth: Add support for SMP Invalid Parameters error code The Invalid Parameters error code is used to indicate that the command length is invalid or that a parameter is outside of the specified range. This error code wasn't clearly specified in the Bluetooth 4.0 specification but since 4.1 this has been fixed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-08 14:19:11 +03:00
Bluetooth: Fix missing PDU length checks for SMP For each received SMP PDU we need to check that we have enough data to fit the specified size of the PDU. This patch adds the necessary checks for each SMP PDU handler and ensures that buffer overflows do not occur if to little data has been received. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:29 +02:00
Bluetooth: Track not yet received keys in SMP To make is easier to track which keys we've received and which ones we're still waiting for simply clear the corresponding key bits from smp->remote_key_dist as they get received. This will allow us to simplify the code for checking for SMP completion in subsequent patches. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-26 23:33:43 +02:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Fix allowing SMP Signing info PDU If the remote side is not distributing its IRK but is distributing the CSRK the next PDU after master identification is the Signing Information. This patch fixes a missing SMP_ALLOW_CMD() for this in the smp_cmd_master_ident() function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-09 16:21:46 -07:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Add support for storing the LTK Now when the LTK is received from the remote or generated it is stored, so it can later be used. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:39 -03:00
Bluetooth: Remove l2cap_conn->src and l2cap_conn->dst usage from SMP The l2cap_conn->src and l2cap_conn->dst addresses are just a pointer to hci_conn->hdev->bdaddr and hci_conn->dst structures. Use the data provided by hci_conn directly. This is done for hci_conn->dst_type already anyway and with this change it makes it a lot clearer were the address information comes from. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-10-13 02:23:39 -07:00
Bluetooth: Remove HCI prefix from SMP LTK defines The LTK type has really nothing to do with HCI so it makes more sense to have these in smp.h than hci.h. This patch moves the defines to smp.h and removes the HCI_ prefix in the same go. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-16 19:25:16 +03:00
Bluetooth: Track SMP keys in the SMP context As preparation to do mgmt notification in a single place at the end of the key distribution, store the keys that need to be notified within the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-19 14:57:46 +02:00
Bluetooth: Fix calling smp_distribute_keys() when still waiting for keys When we're in the process of receiving keys in phase 3 of SMP we keep track of which keys are still expected in the smp->remote_key_dist variable. If we still have some key bits set we need to continue waiting for more PDUs and not needlessly call smp_distribute_keys(). This patch fixes two such cases in the smp_cmd_master_ident() and smp_cmd_ident_addr_info() handler functions. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:54 +03:00
Bluetooth: Remove unnecessary deferred work for SMP key distribution Now that the identity address update happens through its own deferred work there's no need to have smp_distribute_keys anymore behind a second deferred work. This patch removes this extra construction and makes the code do direct calls to smp_distribute_keys() again. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:51 +03:00
Bluetooth: Add support for SMP phase 3 (key distribution) This adds support for generating and distributing all the keys specified in the third phase of SMP. This will make possible to re-establish secure connections, resolve private addresses and sign commands. For now, the values generated are random. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:34 -03:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Add support for SMP Invalid Parameters error code The Invalid Parameters error code is used to indicate that the command length is invalid or that a parameter is outside of the specified range. This error code wasn't clearly specified in the Bluetooth 4.0 specification but since 4.1 this has been fixed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-08 14:19:11 +03:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Fix properly ignoring unexpected SMP PDUs If we didn't request certain pieces of information during the key distribution negotiation we should properly ignore those PDUs if the peer incorrectly sends them. This includes the Encryption Information and Master Identification PDUs if the EncKey bit was not set, and the Identity Information and Identity Address Information PDUs if the IdKey bit was not set. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:37 +02:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Add support for SMP Invalid Parameters error code The Invalid Parameters error code is used to indicate that the command length is invalid or that a parameter is outside of the specified range. This error code wasn't clearly specified in the Bluetooth 4.0 specification but since 4.1 this has been fixed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-08 14:19:11 +03:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Track not yet received keys in SMP To make is easier to track which keys we've received and which ones we're still waiting for simply clear the corresponding key bits from smp->remote_key_dist as they get received. This will allow us to simplify the code for checking for SMP completion in subsequent patches. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-26 23:33:43 +02:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Ignore IRKs with no Identity Address The Core Specification (4.1) leaves room for sending an SMP Identity Address Information PDU with an all-zeros BD_ADDR value. This essentially means that we would not have an Identity Address for the device and the only means of identifying it would be the IRK value itself. Due to lack of any known implementations behaving like this it's best to keep our implementation as simple as possible as far as handling such situations is concerned. This patch updates the Identity Address Information handler function to simply ignore the IRK received from such a device. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-25 22:24:37 +02:00
Bluetooth: Fix valid Identity Address check According to the Bluetooth core specification valid identity addresses are either Public Device Addresses or Static Random Addresses. IRKs received with any other type of address should be discarded since we cannot assume to know the permanent identity of the peer device. This patch fixes a missing check for the Identity Address when receiving the Identity Address Information SMP PDU. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org # 3.17+
2015-01-14 20:51:37 +02:00
Bluetooth: Ignore IRKs with no Identity Address The Core Specification (4.1) leaves room for sending an SMP Identity Address Information PDU with an all-zeros BD_ADDR value. This essentially means that we would not have an Identity Address for the device and the only means of identifying it would be the IRK value itself. Due to lack of any known implementations behaving like this it's best to keep our implementation as simple as possible as far as handling such situations is concerned. This patch updates the Identity Address Information handler function to simply ignore the IRK received from such a device. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-25 22:24:37 +02:00
Bluetooth: Fix valid Identity Address check According to the Bluetooth core specification valid identity addresses are either Public Device Addresses or Static Random Addresses. IRKs received with any other type of address should be discarded since we cannot assume to know the permanent identity of the peer device. This patch fixes a missing check for the Identity Address when receiving the Identity Address Information SMP PDU. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org # 3.17+
2015-01-14 20:51:37 +02:00
Bluetooth: Ignore IRKs with no Identity Address The Core Specification (4.1) leaves room for sending an SMP Identity Address Information PDU with an all-zeros BD_ADDR value. This essentially means that we would not have an Identity Address for the device and the only means of identifying it would be the IRK value itself. Due to lack of any known implementations behaving like this it's best to keep our implementation as simple as possible as far as handling such situations is concerned. This patch updates the Identity Address Information handler function to simply ignore the IRK received from such a device. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-25 22:24:37 +02:00
Bluetooth: Fix missing hdev locking in smp_cmd_ident_addr_info The hdev lock must be held before calling into smp_distribute_keys. Also things such as hci_add_irk() require the lock. This patch fixes the issue by adding the necessary locking into the smp_cmd_ident_addr_info function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-27 14:23:02 +03:00
Bluetooth: Ignore IRKs with no Identity Address The Core Specification (4.1) leaves room for sending an SMP Identity Address Information PDU with an all-zeros BD_ADDR value. This essentially means that we would not have an Identity Address for the device and the only means of identifying it would be the IRK value itself. Due to lack of any known implementations behaving like this it's best to keep our implementation as simple as possible as far as handling such situations is concerned. This patch updates the Identity Address Information handler function to simply ignore the IRK received from such a device. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-25 22:24:37 +02:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Track SMP keys in the SMP context As preparation to do mgmt notification in a single place at the end of the key distribution, store the keys that need to be notified within the SMP context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-19 14:57:46 +02:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Fix missing hdev locking in smp_cmd_ident_addr_info The hdev lock must be held before calling into smp_distribute_keys. Also things such as hci_add_irk() require the lock. This patch fixes the issue by adding the necessary locking into the smp_cmd_ident_addr_info function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-27 14:23:02 +03:00
Bluetooth: Fix calling smp_distribute_keys() when still waiting for keys When we're in the process of receiving keys in phase 3 of SMP we keep track of which keys are still expected in the smp->remote_key_dist variable. If we still have some key bits set we need to continue waiting for more PDUs and not needlessly call smp_distribute_keys(). This patch fixes two such cases in the smp_cmd_master_ident() and smp_cmd_ident_addr_info() handler functions. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:54 +03:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Add support for handling signature resolving keys The connection signature resolving key (CSRK) is used for attribute protocol signed write procedures. This change generates a new local key during pairing and requests the peer key as well. Newly generated key and received key will be provided to userspace using the New Signature Resolving Key management event. The Master CSRK can be used for verification of remote signed write PDUs and the Slave CSRK can be used for sending signed write PDUs to the remote device. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-09 12:19:17 -07:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Add support for handling signature resolving keys The connection signature resolving key (CSRK) is used for attribute protocol signed write procedures. This change generates a new local key during pairing and requests the peer key as well. Newly generated key and received key will be provided to userspace using the New Signature Resolving Key management event. The Master CSRK can be used for verification of remote signed write PDUs and the Slave CSRK can be used for sending signed write PDUs to the remote device. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-09 12:19:17 -07:00
Bluetooth: Add support for SMP Invalid Parameters error code The Invalid Parameters error code is used to indicate that the command length is invalid or that a parameter is outside of the specified range. This error code wasn't clearly specified in the Bluetooth 4.0 specification but since 4.1 this has been fixed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-08 14:19:11 +03:00
Bluetooth: Add support for handling signature resolving keys The connection signature resolving key (CSRK) is used for attribute protocol signed write procedures. This change generates a new local key during pairing and requests the peer key as well. Newly generated key and received key will be provided to userspace using the New Signature Resolving Key management event. The Master CSRK can be used for verification of remote signed write PDUs and the Slave CSRK can be used for sending signed write PDUs to the remote device. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-09 12:19:17 -07:00
Bluetooth: Update New CSRK event to match latest specification The 'master' parameter of the New CSRK event was recently renamed to 'type', with the old values kept for backwards compatibility as unauthenticated local/remote keys. This patch updates the code to take into account the two new (authenticated) values and ensures they get used based on the security level of the connection that the respective keys get distributed over. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-02-27 10:11:13 +02:00
Bluetooth: Add support for handling signature resolving keys The connection signature resolving key (CSRK) is used for attribute protocol signed write procedures. This change generates a new local key during pairing and requests the peer key as well. Newly generated key and received key will be provided to userspace using the New Signature Resolving Key management event. The Master CSRK can be used for verification of remote signed write PDUs and the Slave CSRK can be used for sending signed write PDUs to the remote device. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-09 12:19:17 -07:00
Bluetooth: Remove unnecessary deferred work for SMP key distribution Now that the identity address update happens through its own deferred work there's no need to have smp_distribute_keys anymore behind a second deferred work. This patch removes this extra construction and makes the code do direct calls to smp_distribute_keys() again. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:51 +03:00
Bluetooth: Add support for handling signature resolving keys The connection signature resolving key (CSRK) is used for attribute protocol signed write procedures. This change generates a new local key during pairing and requests the peer key as well. Newly generated key and received key will be provided to userspace using the New Signature Resolving Key management event. The Master CSRK can be used for verification of remote signed write PDUs and the Slave CSRK can be used for sending signed write PDUs to the remote device. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-09 12:19:17 -07:00
Bluetooth: Add selection of the SC authentication method This patch adds code to select the authentication method for Secure Connections based on the local and remote capabilities. A new DSP_PASSKEY method is also added for displaying the passkey - something that is not part of legacy SMP pairing. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:51:02 +03:00
Bluetooth: Track local vs remote OOB data availability There are several decisions in the SMP logic that depend not only on whether we're doing SMP or not, but also whether local and/or remote OOB data is present. This patch splits the existing SMP_FLAG_OOB into two new flags to track local and remote OOB data respectively. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16 11:45:44 +02:00
Bluetooth: Add basic LE SC OOB support for remote OOB data This patch adds basic OOB pairing support when we've received the remote OOB data. This includes tracking the remote r value (in smp->rr) as well as doing the appropriate f4() call when needed. Previously the OOB rand would have been stored in smp->rrnd however these are actually two independent values so we need separate variables for them. Na/Nb in the spec maps to smp->prnd/rrnd and ra/rb maps to smp->rr with smp->pr to come once local OOB data is supported. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-28 15:17:05 +01:00
Bluetooth: Add selection of the SC authentication method This patch adds code to select the authentication method for Secure Connections based on the local and remote capabilities. A new DSP_PASSKEY method is also added for displaying the passkey - something that is not part of legacy SMP pairing. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:51:02 +03:00
Bluetooth: Add handler function for receiving LE SC public key This patch adds a handler function for the LE SC SMP Public Key PDU. When we receive the key we proceed with generating the shared DHKey value from the remote public key and local private key. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:09:28 +03:00
Bluetooth: Add selection of the SC authentication method This patch adds code to select the authentication method for Secure Connections based on the local and remote capabilities. A new DSP_PASSKEY method is also added for displaying the passkey - something that is not part of legacy SMP pairing. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:51:02 +03:00
Bluetooth: Add support for sending LE SC Confirm value Once the public key exchange is complete the next step is for the non-initiating device to send a SMP Pairing Confirm PDU to the initiating device. This requires the use of a new smp_f4 confirm value generation function which in turn builds on the AES-CMAC cryptographic function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:30:08 +03:00
Bluetooth: Add handler function for receiving LE SC public key This patch adds a handler function for the LE SC SMP Public Key PDU. When we receive the key we proceed with generating the shared DHKey value from the remote public key and local private key. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:09:28 +03:00
Bluetooth: Don't send public key if OOB data verification fails When we receive the remote public key, if we have remote OOB data there's no point in sending our public key to the remote if the OOB data doesn't match. This patch moves the test for this higher up in the smp_cmd_public_key() function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16 18:12:57 +02:00
Bluetooth: Add handler function for receiving LE SC public key This patch adds a handler function for the LE SC SMP Public Key PDU. When we receive the key we proceed with generating the shared DHKey value from the remote public key and local private key. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:09:28 +03:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Use smp->remote_pk + 32 instead of &smp->remote_pk[32] Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 12:34:55 -07:00
Bluetooth: Add handler function for receiving LE SC public key This patch adds a handler function for the LE SC SMP Public Key PDU. When we receive the key we proceed with generating the shared DHKey value from the remote public key and local private key. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:09:28 +03:00
Bluetooth: Introduce SMP_DBG macro for low-level debuging The various inputs & outputs of the crypto functions as well as the values of the ECDH keys can be considered security sensitive. They should therefore not end up in dmesg by mistake. This patch introduces a new SMP_DBG macro which requires explicit compilation with -DDEBUG to be enabled. All crypto related data logs now use this macro instead of BT_DBG. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-01 22:03:16 +02:00
Bluetooth: Add handler function for receiving LE SC public key This patch adds a handler function for the LE SC SMP Public Key PDU. When we receive the key we proceed with generating the shared DHKey value from the remote public key and local private key. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:09:28 +03:00
Bluetooth: Add selection of the SC authentication method This patch adds code to select the authentication method for Secure Connections based on the local and remote capabilities. A new DSP_PASSKEY method is also added for displaying the passkey - something that is not part of legacy SMP pairing. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:51:02 +03:00
Bluetooth: Detect SMP SC debug keys We need to be able to detect if the remote side used a debug key for the pairing. This patch adds the debug key defines and sets a flag to indicate that a debug key was used. The debug private key (debug_sk) is also added in this patch but will only be used in a subsequent patch when local debug key support is implemented. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:52:28 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Fix verifying confirm value when lacking remote OOB data If we haven't received remote OOB data we cannot perform any special checks on the confirm value. This patch updates the check after having received the public key to only perform the verification if we have remote OOB data present. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16 11:45:46 +02:00
Bluetooth: Add basic LE SC OOB support for remote OOB data This patch adds basic OOB pairing support when we've received the remote OOB data. This includes tracking the remote r value (in smp->rr) as well as doing the appropriate f4() call when needed. Previously the OOB rand would have been stored in smp->rrnd however these are actually two independent values so we need separate variables for them. Na/Nb in the spec maps to smp->prnd/rrnd and ra/rb maps to smp->rr with smp->pr to come once local OOB data is supported. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-28 15:17:05 +01:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Add support for sending LE SC Confirm value Once the public key exchange is complete the next step is for the non-initiating device to send a SMP Pairing Confirm PDU to the initiating device. This requires the use of a new smp_f4 confirm value generation function which in turn builds on the AES-CMAC cryptographic function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:30:08 +03:00
Bluetooth: Add handler function for receiving LE SC public key This patch adds a handler function for the LE SC SMP Public Key PDU. When we receive the key we proceed with generating the shared DHKey value from the remote public key and local private key. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:09:28 +03:00
Bluetooth: Add support for LE SC DHKey check PDU Once we receive the DHKey check PDU it's time to first verify that the value is correct and then proceed with encrypting the link. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:47:30 +03:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Fix local OOB data handling for SMP We need to store the local ra/rb value in order to verify the Check value received from the remote. This patch adds a new 'lr' for the local ra/rb value and makes sure it gets used when verifying the DHKey Check PDU received from the remote. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16 11:45:43 +02:00
Bluetooth: Add passkey entry support for LE SC The passkey entry mechanism involves either both sides requesting the user for a passkey, or one side requesting the passkey while the other one displays it. The behavior as far as SMP PDUs are concerned are considerably different from numeric comparison and therefore requires several new functions to handle it. In essence passkey entry involves both sides gradually committing to each bit of the passkey which involves 20 rounds of pairing confirm and pairing random PDUS being sent in both directions. This patch adds a new smp->passkey_round variable to track the current round of the passkey commitment and reuses the variables already present in struct hci_conn for the passkey and entered key count. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-25 11:10:28 +03:00
Bluetooth: Add support for LE SC DHKey check PDU Once we receive the DHKey check PDU it's time to first verify that the value is correct and then proceed with encrypting the link. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:47:30 +03:00
Bluetooth: Fix DHKey Check sending order for slave role According to the LE SC specification the initiating device sends its DHKey check first and the non-initiating devices sends its DHKey check as a response to this. It's also important that the non-initiating device doesn't send the response if it's still waiting for user input. In order to synchronize all this a new flag is added. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-04 11:07:40 +03:00
Bluetooth: Set correct LTK type and authentication for SC After generating the LTK we should set the correct type (normal SC or debug) and authentication information for it. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:53:36 +03:00
Bluetooth: Fix DHKey Check sending order for slave role According to the LE SC specification the initiating device sends its DHKey check first and the non-initiating devices sends its DHKey check as a response to this. It's also important that the non-initiating device doesn't send the response if it's still waiting for user input. In order to synchronize all this a new flag is added. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-04 11:07:40 +03:00
Bluetooth: Set correct LTK type and authentication for SC After generating the LTK we should set the correct type (normal SC or debug) and authentication information for it. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-05-31 18:53:36 +03:00
Bluetooth: Fix DHKey Check sending order for slave role According to the LE SC specification the initiating device sends its DHKey check first and the non-initiating devices sends its DHKey check as a response to this. It's also important that the non-initiating device doesn't send the response if it's still waiting for user input. In order to synchronize all this a new flag is added. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-04 11:07:40 +03:00
Bluetooth: Add support for LE SC DHKey check PDU Once we receive the DHKey check PDU it's time to first verify that the value is correct and then proceed with encrypting the link. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:47:30 +03:00
Bluetooth: Fix encryption key size handling for LTKs The encryption key size for LTKs is supposed to be applied only at the moment of encryption. When generating a Link Key (using LE SC) from the LTK the full non-shortened value should be used. This patch modifies the code to always keep the full value around and only apply the key size when passing the value to HCI. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-08 18:14:39 +03:00
Bluetooth: Add support for LE SC DHKey check PDU Once we receive the DHKey check PDU it's time to first verify that the value is correct and then proceed with encrypting the link. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:47:30 +03:00
Bluetooth: Add dummy handler for LE SC keypress notification Since we don not actively try to clear the keypress notification bit we might get these PDUs. To avoid failing the pairing process add a simple dummy handler for these for now. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-04 22:45:57 +03:00
Bluetooth: Call l2cap_conn_shutdown() when SMP recv callback fails To restore pre-l2cap_chan functionality we should be trying to disconnect the connection when receviving garbage SMP data (i.e. when the SMP command handler fails). This patch renames the command handler back to smp_sig_channel() and adds a smp_recv_cb() wrapper function for calling it. If smp_sig_channel() fails the code calls l2cap_conn_shutdown(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:38 +03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: SMP packets are only valid on LE connections When receiving SMP packets on a BR/EDR connection, then just drop the packet and do not try to process it. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-10-03 00:00:57 -07:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Check minimum length of SMP packets When SMP packets are received, make sure they contain at least 1 byte header for the opcode. If not, drop the packet and disconnect the link. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-10-03 01:23:08 -07:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Fix double free of SMP data skb In the case that the SMP recv callback returns error the calling code in l2cap_core.c expects that it still owns the skb and will try to free it. The SMP code should therefore not try to free the skb if it return an error. This patch fixes such behavior in the SMP command handler function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:39 +03:00
Bluetooth: Check minimum length of SMP packets When SMP packets are received, make sure they contain at least 1 byte header for the opcode. If not, drop the packet and disconnect the link. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-10-03 01:23:08 -07:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Remove enable_smp parameter The enable_smp parameter is no longer needed. It can be replaced by checking lmp_host_le_capable. Signed-off-by: Andre Guedes <andre.guedes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-30 19:20:56 -03:00
Bluetooth: Check minimum length of SMP packets When SMP packets are received, make sure they contain at least 1 byte header for the opcode. If not, drop the packet and disconnect the link. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-10-03 01:23:08 -07:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Centralize disallowing SMP commands to a single place All the cases where we mark SMP commands as dissalowed are their respective command handlers. We can therefore simplify the code by always clearing the bit immediately after testing it. This patch converts the corresponding test_bit() call to a test_and_clear_bit() call and also removes the now unused SMP_DISALLOW_CMD macro. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-10 17:37:43 -07:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Fix handling of unexpected SMP PDUs The conn->smp_chan pointer can be NULL if SMP PDUs arrive at unexpected moments. To avoid NULL pointer dereferences the code should be checking for this and disconnect if an unexpected SMP PDU arrives. This patch fixes the issue by adding a check for conn->smp_chan for all other PDUs except pairing request and security request (which are are the first PDUs to come to initialize the SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> CC: stable@vger.kernel.org Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
2013-01-29 10:44:23 -06:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Fix handling of unexpected SMP PDUs The conn->smp_chan pointer can be NULL if SMP PDUs arrive at unexpected moments. To avoid NULL pointer dereferences the code should be checking for this and disconnect if an unexpected SMP PDU arrives. This patch fixes the issue by adding a check for conn->smp_chan for all other PDUs except pairing request and security request (which are are the first PDUs to come to initialize the SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> CC: stable@vger.kernel.org Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
2013-01-29 10:44:23 -06:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Remove unnecessary 'send' parameter from smp_failure() The send parameter has only been used for determining whether to send a Pairing Failed PDU or not. However, the function can equally well use the already existing reason parameter to make this choice and send the PDU whenever a non-zero value was passed. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-11-06 11:24:57 +02:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add support for Pairing features exchange This patch implements a simple version of the SMP Pairing Features exchange procedure (Vol. 3 Part H, Section 2.3.5.1). For now, everything that would cause a Pairing Method different of Just Works to be chosen is rejected. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:53 -03:00
Bluetooth: Add simple SMP pairing negotiation This implementation only exchanges SMP messages between the Host and the Remote. No keys are being generated. TK and STK generation will be provided in further patches. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:42 -03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add support for SMP phase 3 (key distribution) This adds support for generating and distributing all the keys specified in the third phase of SMP. This will make possible to re-establish secure connections, resolve private addresses and sign commands. For now, the values generated are random. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:34 -03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add support for SMP phase 3 (key distribution) This adds support for generating and distributing all the keys specified in the third phase of SMP. This will make possible to re-establish secure connections, resolve private addresses and sign commands. For now, the values generated are random. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:34 -03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Enable support for remote IRK distribution This patch does the necessary changes to request the remote device to distribute its IRK to us during the SMP pairing procedure. This includes setting the right key distribution values in the pairing request/response and handling of the two related SMP PDUs, i.e. Identity Information and Identity Address Information. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-18 10:19:36 +02:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add support for handling signature resolving keys The connection signature resolving key (CSRK) is used for attribute protocol signed write procedures. This change generates a new local key during pairing and requests the peer key as well. Newly generated key and received key will be provided to userspace using the New Signature Resolving Key management event. The Master CSRK can be used for verification of remote signed write PDUs and the Slave CSRK can be used for sending signed write PDUs to the remote device. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-09 12:19:17 -07:00
Bluetooth: Add support for SMP phase 3 (key distribution) This adds support for generating and distributing all the keys specified in the third phase of SMP. This will make possible to re-establish secure connections, resolve private addresses and sign commands. For now, the values generated are random. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:34 -03:00
Bluetooth: Add handler function for receiving LE SC public key This patch adds a handler function for the LE SC SMP Public Key PDU. When we receive the key we proceed with generating the shared DHKey value from the remote public key and local private key. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:09:28 +03:00
Bluetooth: Add support for LE SC DHKey check PDU Once we receive the DHKey check PDU it's time to first verify that the value is correct and then proceed with encrypting the link. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-06 11:47:30 +03:00
Bluetooth: Add dummy handler for LE SC keypress notification Since we don not actively try to clear the keypress notification bit we might get these PDUs. To avoid failing the pairing process add a simple dummy handler for these for now. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-06-04 22:45:57 +03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add support for using the crypto subsystem This will allow using the crypto subsystem for encrypting data. As SMP (Security Manager Protocol) is implemented almost entirely on the host side and the crypto module already implements the needed methods (AES-128), it makes sense to use it. There's now a new module option to enable/disable SMP support. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:43 -03:00
Bluetooth: Fix SMP error and response to be mutually exclusive Returning failure from the SMP data parsing function will cause an immediate disconnect, making any attempts to send a response PDU futile. This patch updates the function to always either send a response or return an error, but never both at the same time: * In the case that HCI_LE_ENABLED is not set we want to send a Pairing Not Supported response but it is not required to force a disconnection, so do not set the error return in this case. * If we get garbage SMP data we can just fail with the handler function instead of also trying to send an SMP Failure PDU. * There's no reason to force a disconnection if we receive an unknown SMP command. Instead simply send a proper Command Not Supported SMP response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-18 20:33:31 +03:00
Bluetooth: Fix double free of SMP data skb In the case that the SMP recv callback returns error the calling code in l2cap_core.c expects that it still owns the skb and will try to free it. The SMP code should therefore not try to free the skb if it return an error. This patch fixes such behavior in the SMP command handler function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:39 +03:00
Bluetooth: Fix SMP error and response to be mutually exclusive Returning failure from the SMP data parsing function will cause an immediate disconnect, making any attempts to send a response PDU futile. This patch updates the function to always either send a response or return an error, but never both at the same time: * In the case that HCI_LE_ENABLED is not set we want to send a Pairing Not Supported response but it is not required to force a disconnection, so do not set the error return in this case. * If we get garbage SMP data we can just fail with the handler function instead of also trying to send an SMP Failure PDU. * There's no reason to force a disconnection if we receive an unknown SMP command. Instead simply send a proper Command Not Supported SMP response. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-18 20:33:31 +03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add strict checks for allowed SMP PDUs SMP defines quite clearly when certain PDUs are to be expected/allowed and when not, but doesn't have any explicit request/response definition. So far the code has relied on each PDU handler to behave correctly if receiving PDUs at an unexpected moment, however this requires many different checks and is prone to errors. This patch introduces a generic way to keep track of allowed PDUs and thereby reduces the responsibility & load on individual command handlers. The tracking is implemented using a simple bit-mask where each opcode maps to its own bit. If the bit is set the corresponding PDU is allow and if the bit is not set the PDU is not allowed. As a simple example, when we send the Pairing Request we'd set the bit for Pairing Response, and when we receive the Pairing Response we'd clear the bit for Pairing Response. Since the disallowed PDU rejection is now done in a single central place we need to be a bit careful of which action makes most sense to all cases. Previously some, such as Security Request, have been simply ignored whereas others have caused an explicit disconnect. The only PDU rejection action that keeps good interoperability and can be used for all the applicable use cases is to drop the data. This may raise some concerns of us now being more lenient for misbehaving (and potentially malicious) devices, but the policy of simply dropping data has been a successful one for many years e.g. in L2CAP (where this is the *only* policy for such cases - we never request disconnection in l2cap_core.c because of bad data). Furthermore, we cannot prevent connected devices from creating the SMP context (through a Security or Pairing Request), and once the context exists looking up the corresponding bit for the received opcode and deciding to reject it is essentially an equally lightweight operation as the kind of rejection that l2cap_core.c already successfully does. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:55 +03:00
Bluetooth: Implement the first SMP commands These simple commands will allow the SMP procedure to be started and terminated with a not supported error. This is the first step toward something useful. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-09 18:50:40 -03:00
Bluetooth: Add support for SMP phase 3 (key distribution) This adds support for generating and distributing all the keys specified in the third phase of SMP. This will make possible to re-establish secure connections, resolve private addresses and sign commands. For now, the values generated are random. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 18:59:34 -03:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Fix locking of the SMP context Before the move the l2cap_chan the SMP context (smp_chan) didn't have any kind of proper locking. The best there existed was the HCI_CONN_LE_SMP_PEND flag which was used to enable mutual exclusion for potential multiple creators of the SMP context. Now that SMP has been converted to use the l2cap_chan infrastructure and since the SMP context is directly mapped to a corresponding l2cap_chan we get the SMP context locking essentially for free through the l2cap_chan lock. For all callbacks that l2cap_core.c makes for each channel implementation (smp.c in the case of SMP) the l2cap_chan lock is held through l2cap_chan_lock(chan). Since the calls from l2cap_core.c to smp.c are covered the only missing piece to have the locking implemented properly is to ensure that the lock is held for any other call path that may access the SMP context. This means user responses through mgmt.c, requests to elevate the security of a connection through hci_conn.c, as well as any deferred work through workqueues. This patch adds the necessary locking to all these other code paths that try to access the SMP context. Since mutual exclusion for the l2cap_chan access is now covered from all directions the patch also removes unnecessary HCI_CONN_LE_SMP_PEND flag (once we've acquired the chan lock we can simply check whether chan->smp is set to know if there's an SMP context). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:52 +03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Merge hdev->dbg_flags fields into hdev->dev_flags With the extension of hdev->dev_flags utilizing a bitmap now, the space is no longer restricted. Merge the hdev->dbg_flags into hdev->dev_flags to save space on 64-bit architectures. On 32-bit architectures no size reduction happens. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 10:20:35 -07:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Introduce hci_dev_test_flag helper macro Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 02:11:00 -07:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Add SMP-internal timeout callback This patch adds an SMP-internal timeout callback to remove the depenency on (the soon to be removed) l2cap_conn->security_timer. The behavior is the same as with l2cap_conn->security_timer except that the new l2cap_conn_shutdown() public function is used instead of the L2CAP core internal l2cap_conn_del(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:40 +03:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Always call smp_distribute_keys() from a workqueue The smp_distribute_keys() function calls smp_notify_keys() which in turn calls l2cap_conn_update_id_addr(). The l2cap_conn_update_id_addr() function will iterate through all L2CAP channels for the respective connection: lock the channel, update the address information and unlock the channel. Since SMP is now using l2cap_chan callbacks each callback is called with the channel lock held. Therefore, calling l2cap_conn_update_id_addr() would cause a deadlock calling l2cap_chan_lock() on the SMP channel. This patch moves calling smp_distribute_keys() through a workqueue so that it is never called from an L2CAP channel callback. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:43 +03:00
Bluetooth: Add SMP-internal timeout callback This patch adds an SMP-internal timeout callback to remove the depenency on (the soon to be removed) l2cap_conn->security_timer. The behavior is the same as with l2cap_conn->security_timer except that the new l2cap_conn_shutdown() public function is used instead of the L2CAP core internal l2cap_conn_del(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:40 +03:00
Bluetooth: Don't take any action in smp_resume_cb if not encrypted When smp_resume_cb is called if we're not encrypted (i.e. the callback wasn't called because the connection became encrypted) we shouldn't take any action at all. This patch moves also the security_timer cancellation behind this condition. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:49 +03:00
Bluetooth: Always call smp_distribute_keys() from a workqueue The smp_distribute_keys() function calls smp_notify_keys() which in turn calls l2cap_conn_update_id_addr(). The l2cap_conn_update_id_addr() function will iterate through all L2CAP channels for the respective connection: lock the channel, update the address information and unlock the channel. Since SMP is now using l2cap_chan callbacks each callback is called with the channel lock held. Therefore, calling l2cap_conn_update_id_addr() would cause a deadlock calling l2cap_chan_lock() on the SMP channel. This patch moves calling smp_distribute_keys() through a workqueue so that it is never called from an L2CAP channel callback. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:43 +03:00
Bluetooth: Remove unnecessary deferred work for SMP key distribution Now that the identity address update happens through its own deferred work there's no need to have smp_distribute_keys anymore behind a second deferred work. This patch removes this extra construction and makes the code do direct calls to smp_distribute_keys() again. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-05 22:19:51 +03:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Fix l2cap_chan leak in SMP The L2CAP core expects channel implementations to manage the reference returned by the new_connection callback. With sockets this is already handled with each channel being tied to the corresponding socket. With SMP however there's no context to tie the pointer to in the smp_new_conn_cb function. The function can also not just drop the reference since it's the only one at that point. For fixed channels (like SMP) the code path inside the L2CAP core from new_connection() to ready() is short and straight-forwards. The crucial difference is that in ready() the implementation has access to the l2cap_conn that SMP needs associate its l2cap_chan. Instead of taking a new reference in smp_ready_cb() we can simply assume to already own the reference created in smp_new_conn_cb(), i.e. there is no need to call l2cap_chan_hold(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org # 3.19+
2015-11-11 21:47:12 +02:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Add full SMP BR/EDR support When doing SMP over BR/EDR some of the routines can be shared with the LE functionality whereas others needs to be split into their own BR/EDR specific branches. This patch implements the split of BR/EDR specific SMP code from the LE-only code, making sure SMP over BR/EDR works as specified. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-14 12:34:26 +03:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Call l2cap_conn_shutdown() when SMP recv callback fails To restore pre-l2cap_chan functionality we should be trying to disconnect the connection when receviving garbage SMP data (i.e. when the SMP command handler fails). This patch renames the command handler back to smp_sig_channel() and adds a smp_recv_cb() wrapper function for calling it. If smp_sig_channel() fails the code calls l2cap_conn_shutdown(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:38 +03:00
Bluetooth: Add SMP-internal timeout callback This patch adds an SMP-internal timeout callback to remove the depenency on (the soon to be removed) l2cap_conn->security_timer. The behavior is the same as with l2cap_conn->security_timer except that the new l2cap_conn_shutdown() public function is used instead of the L2CAP core internal l2cap_conn_del(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:40 +03:00
Bluetooth: Call l2cap_conn_shutdown() when SMP recv callback fails To restore pre-l2cap_chan functionality we should be trying to disconnect the connection when receviving garbage SMP data (i.e. when the SMP command handler fails). This patch renames the command handler back to smp_sig_channel() and adds a smp_recv_cb() wrapper function for calling it. If smp_sig_channel() fails the code calls l2cap_conn_shutdown(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:38 +03:00
Bluetooth: Add SMP-internal timeout callback This patch adds an SMP-internal timeout callback to remove the depenency on (the soon to be removed) l2cap_conn->security_timer. The behavior is the same as with l2cap_conn->security_timer except that the new l2cap_conn_shutdown() public function is used instead of the L2CAP core internal l2cap_conn_del(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:40 +03:00
Bluetooth: Call l2cap_conn_shutdown() when SMP recv callback fails To restore pre-l2cap_chan functionality we should be trying to disconnect the connection when receviving garbage SMP data (i.e. when the SMP command handler fails). This patch renames the command handler back to smp_sig_channel() and adds a smp_recv_cb() wrapper function for calling it. If smp_sig_channel() fails the code calls l2cap_conn_shutdown(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:38 +03:00
Bluetooth: Use hci_disconnect for immediate disconnection from SMP Relying on the l2cap_conn_del procedure (triggered through the l2cap_conn_shutdown API) to get the connection disconnected is not reliable as it depends on all users releasing (through hci_conn_drop) and that there's at least one user (so hci_conn_drop is called at least one time). A much simpler and more reliable solution is to call hci_disconnect() directly from the SMP code when we want to disconnect. One side-effect this has is that it prevents any SMP Failure PDU from being sent before the disconnection, however neither one of the scenarios where l2cap_conn_shutdown was used really requires this. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-18 20:33:29 +03:00
Bluetooth: Call l2cap_conn_shutdown() when SMP recv callback fails To restore pre-l2cap_chan functionality we should be trying to disconnect the connection when receviving garbage SMP data (i.e. when the SMP command handler fails). This patch renames the command handler back to smp_sig_channel() and adds a smp_recv_cb() wrapper function for calling it. If smp_sig_channel() fails the code calls l2cap_conn_shutdown(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:38 +03:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Refactor L2CAP variables into l2cap_ctrl We're getting very close to the maximum possible size of bt_skb_cb. To prepare to shrink the struct with the help of a union this patch moves all L2CAP related variables into the l2cap_ctrl struct. To later add other 'ctrl' structs the L2CAP one is renamed simple 'l2cap' instead of 'control'. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-30 23:21:01 +03:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Convert SMP to use l2cap_chan infrastructure Now that we have all the necessary pieces in place we can fully convert SMP to use the L2CAP channel infrastructure. This patch adds the necessary callbacks and removes the now unneeded conn->smp_chan pointer. One notable behavioral change in this patch comes from the following code snippet: - case L2CAP_CID_SMP: - if (smp_sig_channel(conn, skb)) - l2cap_conn_del(conn->hcon, EACCES); This piece of code was essentially forcing a disconnection if garbage SMP data was received. The l2cap_conn_del() function is private to l2cap_conn.c so we don't have access to it anymore when using the L2CAP channel callbacks. Therefore, the behavior of the new code is simply to return errors in the recv() callback (which is simply the old smp_sig_channel()), but no disconnection will occur. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:18 +03:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Use L2CAP resume callback to call smp_distribute_keys There's no need to export the smp_distribute_keys() function since the resume callback is called in the same scenario. This patch makes the smp_notify_keys function private (at the same time moving it higher up in smp.c to avoid forward declarations) and adds a resume callback for SMP to call it from there instead. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-11 22:06:36 +03:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Use proper nesting annotation for l2cap_chan lock By default lockdep considers all L2CAP channels equal. This would mean that we get warnings if a channel is locked when another one's lock is tried to be acquired in the same thread. This kind of inter-channel locking dependencies exist in the form of parent-child channels as well as any channel wishing to elevate the security by requesting procedures on the SMP channel. To eliminate the chance for these lockdep warnings we introduce a nesting level for each channel and use that when acquiring the channel lock. For now there exists the earlier mentioned three identified categories: SMP, "normal" channels and parent channels (i.e. those in BT_LISTEN state). The nesting level is defined as atomic_t since we need access to it before the lock is actually acquired. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-11-12 22:22:21 +02:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Move SMP (de)initialization to smp.c As preparation for moving SMP to use l2cap_chan infrastructure we need to move the (de)initialization functions to smp.c (where they'll eventually need access to the local L2CAP channel callbacks). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:32:52 +03:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Add support for AES-CMAC hash for security manager device The security manager device will require the use of AES-CMAC hash for out-of-band data generation. This patch makes sure it is correctly set up and available. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:21 -07:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Move SMP (de)initialization to smp.c As preparation for moving SMP to use l2cap_chan infrastructure we need to move the (de)initialization functions to smp.c (where they'll eventually need access to the local L2CAP channel callbacks). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:32:52 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Make AES crypto context private to SMP Now that we have per-adapter SMP data thanks to the root SMP L2CAP channel we can take advantage of it and attach the AES crypto context (only used for SMP) to it. This means that the smp_irk_matches() and smp_generate_rpa() function can be converted to internally handle the AES context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:17 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: fix err_cast.cocci warnings net/bluetooth/smp.c:2650:9-16: WARNING: ERR_CAST can be used with tfm_aes Use ERR_CAST inlined function instead of ERR_PTR(PTR_ERR(...)) Generated by: scripts/coccinelle/api/err_cast.cocci Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-08 03:04:38 +08:00
Bluetooth: Move SMP (de)initialization to smp.c As preparation for moving SMP to use l2cap_chan infrastructure we need to move the (de)initialization functions to smp.c (where they'll eventually need access to the local L2CAP channel callbacks). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:32:52 +03:00
Bluetooth: Add support for AES-CMAC hash for security manager device The security manager device will require the use of AES-CMAC hash for out-of-band data generation. This patch makes sure it is correctly set up and available. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:21 -07:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Add support for AES-CMAC hash for security manager device The security manager device will require the use of AES-CMAC hash for out-of-band data generation. This patch makes sure it is correctly set up and available. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:21 -07:00
Bluetooth: Add debugfs support for min LE encryption key size This patch adds a debugfs control to set a different minimum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly (e.g. that we get appropriate 'Encryption Key Size' error responses when necessary). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:27 +03:00
Bluetooth: Add debugfs support for max LE encryption key size This patch adds a debugfs control to set a different maximum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:26 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Fix potential NULL dereference in SMP channel setup When the allocation of the L2CAP channel for the BR/EDR security manager fails, then the smp variable might be NULL. In that case do not try to free the non-existing crypto contexts Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-17 11:38:24 -07:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Make AES crypto context private to SMP Now that we have per-adapter SMP data thanks to the root SMP L2CAP channel we can take advantage of it and attach the AES crypto context (only used for SMP) to it. This means that the smp_irk_matches() and smp_generate_rpa() function can be converted to internally handle the AES context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:17 +03:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Fix LE SMP channel source address and source address type The source address and source address type of the LE SMP channel can either be the public address of the controller or the static random address configured by the host. Right now the public address is used for the LE SMP channel and obviously that is not correct if the controller operates with the configured static random address. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-01-14 15:43:09 -08:00
Bluetooth: Use hci_copy_identity_addr() helper for SMP chan creation The only reason the SMP code is essentially duplicating the hci_copy_identity_addr() function is that the helper returns the address type in the HCI format rather than the three-value format expected by l2cap_chan. This patch converts the SMP code to use the helper and then do a simple conversion from one address type to another. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-02-20 13:48:24 +02:00
Bluetooth: Fix LE SMP channel source address and source address type The source address and source address type of the LE SMP channel can either be the public address of the controller or the static random address configured by the host. Right now the public address is used for the LE SMP channel and obviously that is not correct if the controller operates with the configured static random address. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-01-14 15:43:09 -08:00
Bluetooth: Use hci_copy_identity_addr() helper for SMP chan creation The only reason the SMP code is essentially duplicating the hci_copy_identity_addr() function is that the helper returns the address type in the HCI format rather than the three-value format expected by l2cap_chan. This patch converts the SMP code to use the helper and then do a simple conversion from one address type to another. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-02-20 13:48:24 +02:00
Bluetooth: Fix LE SMP channel source address and source address type The source address and source address type of the LE SMP channel can either be the public address of the controller or the static random address configured by the host. Right now the public address is used for the LE SMP channel and obviously that is not correct if the controller operates with the configured static random address. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-01-14 15:43:09 -08:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Fix LE SMP channel source address and source address type The source address and source address type of the LE SMP channel can either be the public address of the controller or the static random address configured by the host. Right now the public address is used for the LE SMP channel and obviously that is not correct if the controller operates with the configured static random address. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-01-14 15:43:09 -08:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Use proper nesting annotation for l2cap_chan lock By default lockdep considers all L2CAP channels equal. This would mean that we get warnings if a channel is locked when another one's lock is tried to be acquired in the same thread. This kind of inter-channel locking dependencies exist in the form of parent-child channels as well as any channel wishing to elevate the security by requesting procedures on the SMP channel. To eliminate the chance for these lockdep warnings we introduce a nesting level for each channel and use that when acquiring the channel lock. For now there exists the earlier mentioned three identified categories: SMP, "normal" channels and parent channels (i.e. those in BT_LISTEN state). The nesting level is defined as atomic_t since we need access to it before the lock is actually acquired. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-11-12 22:22:21 +02:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Move SMP (de)initialization to smp.c As preparation for moving SMP to use l2cap_chan infrastructure we need to move the (de)initialization functions to smp.c (where they'll eventually need access to the local L2CAP channel callbacks). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:32:52 +03:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Move SMP (de)initialization to smp.c As preparation for moving SMP to use l2cap_chan infrastructure we need to move the (de)initialization functions to smp.c (where they'll eventually need access to the local L2CAP channel callbacks). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:32:52 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Move SMP (de)initialization to smp.c As preparation for moving SMP to use l2cap_chan infrastructure we need to move the (de)initialization functions to smp.c (where they'll eventually need access to the local L2CAP channel callbacks). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:32:52 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Make AES crypto context private to SMP Now that we have per-adapter SMP data thanks to the root SMP L2CAP channel we can take advantage of it and attach the AES crypto context (only used for SMP) to it. This means that the smp_irk_matches() and smp_generate_rpa() function can be converted to internally handle the AES context. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:17 +03:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Add support for AES-CMAC hash for security manager device The security manager device will require the use of AES-CMAC hash for out-of-band data generation. This patch makes sure it is correctly set up and available. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:21 -07:00
Bluetooth: Create SMP device structure for local crypto context Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16 01:10:19 -07:00
Bluetooth: Move SMP (de)initialization to smp.c As preparation for moving SMP to use l2cap_chan infrastructure we need to move the (de)initialization functions to smp.c (where they'll eventually need access to the local L2CAP channel callbacks). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:32:52 +03:00
Bluetooth: Add SMP L2CAP channel skeleton This patch creates the initial SMP L2CAP channels and a skeleton for their callbacks. There is one per-adapter channel created upon adapter registration, and then one channel per-connection created through the new_connection callback. The channels are registered with the reserved CID 0x1f for now in order to not conflict with existing SMP functionality. Once everything is in place the value can be changed to what it should be, i.e. L2CAP_CID_SMP. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:37:16 +03:00
Bluetooth: Move SMP (de)initialization to smp.c As preparation for moving SMP to use l2cap_chan infrastructure we need to move the (de)initialization functions to smp.c (where they'll eventually need access to the local L2CAP channel callbacks). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-08 09:32:52 +03:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Introduce force_bredr_smp debugfs option for testing Testing cross-transport pairing that starts on BR/EDR is only valid when using a controller with BR/EDR Secure Connections. Devices will indicate this by providing BR/EDR SMP fixed channel over L2CAP. To allow testing of this feature on Bluetooth 4.0 controller or controllers without the BR/EDR Secure Connections features, introduce a force_bredr_smp debugfs option that allows faking the required AES connection. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-12-31 14:43:16 -08:00
Bluetooth: Merge hdev->dbg_flags fields into hdev->dev_flags With the extension of hdev->dev_flags utilizing a bitmap now, the space is no longer restricted. Merge the hdev->dbg_flags into hdev->dev_flags to save space on 64-bit architectures. On 32-bit architectures no size reduction happens. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 10:20:35 -07:00
Bluetooth: Introduce force_bredr_smp debugfs option for testing Testing cross-transport pairing that starts on BR/EDR is only valid when using a controller with BR/EDR Secure Connections. Devices will indicate this by providing BR/EDR SMP fixed channel over L2CAP. To allow testing of this feature on Bluetooth 4.0 controller or controllers without the BR/EDR Secure Connections features, introduce a force_bredr_smp debugfs option that allows faking the required AES connection. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-12-31 14:43:16 -08:00
Bluetooth: Merge hdev->dbg_flags fields into hdev->dev_flags With the extension of hdev->dev_flags utilizing a bitmap now, the space is no longer restricted. Merge the hdev->dbg_flags into hdev->dev_flags to save space on 64-bit architectures. On 32-bit architectures no size reduction happens. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 10:20:35 -07:00
Bluetooth: Introduce force_bredr_smp debugfs option for testing Testing cross-transport pairing that starts on BR/EDR is only valid when using a controller with BR/EDR Secure Connections. Devices will indicate this by providing BR/EDR SMP fixed channel over L2CAP. To allow testing of this feature on Bluetooth 4.0 controller or controllers without the BR/EDR Secure Connections features, introduce a force_bredr_smp debugfs option that allows faking the required AES connection. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-12-31 14:43:16 -08:00
Bluetooth: Merge hdev->dbg_flags fields into hdev->dev_flags With the extension of hdev->dev_flags utilizing a bitmap now, the space is no longer restricted. Merge the hdev->dbg_flags into hdev->dev_flags to save space on 64-bit architectures. On 32-bit architectures no size reduction happens. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-13 10:20:35 -07:00
Bluetooth: Introduce force_bredr_smp debugfs option for testing Testing cross-transport pairing that starts on BR/EDR is only valid when using a controller with BR/EDR Secure Connections. Devices will indicate this by providing BR/EDR SMP fixed channel over L2CAP. To allow testing of this feature on Bluetooth 4.0 controller or controllers without the BR/EDR Secure Connections features, introduce a force_bredr_smp debugfs option that allows faking the required AES connection. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-12-31 14:43:16 -08:00
Bluetooth: Add debugfs support for min LE encryption key size This patch adds a debugfs control to set a different minimum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly (e.g. that we get appropriate 'Encryption Key Size' error responses when necessary). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:27 +03:00
Bluetooth: Add debugfs support for max LE encryption key size This patch adds a debugfs control to set a different maximum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:26 +03:00
Bluetooth: Add debugfs support for min LE encryption key size This patch adds a debugfs control to set a different minimum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly (e.g. that we get appropriate 'Encryption Key Size' error responses when necessary). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:27 +03:00
Bluetooth: Add debugfs support for max LE encryption key size This patch adds a debugfs control to set a different maximum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:26 +03:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Don't register any SMP channel if LE is not supported When LE features are not supported, then do not bother registering any kind of SMP channel. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-01-14 15:43:10 -08:00
Bluetooth: Add paranoid check for existing LE and BR/EDR SMP channels When the SMP channels have been already registered, then print out a clear WARN_ON message that something went wrong. Also unregister the existing channels in this case before trying to register new ones. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-01-15 08:04:21 -08:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Add debugfs support for min LE encryption key size This patch adds a debugfs control to set a different minimum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly (e.g. that we get appropriate 'Encryption Key Size' error responses when necessary). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:27 +03:00
Bluetooth: Add debugfs support for max LE encryption key size This patch adds a debugfs control to set a different maximum LE encryption key size. This is useful for testing that implementation of the encryption key size handling is behaving correctly. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-11 13:52:26 +03:00
Bluetooth: Introduce force_bredr_smp debugfs option for testing Testing cross-transport pairing that starts on BR/EDR is only valid when using a controller with BR/EDR Secure Connections. Devices will indicate this by providing BR/EDR SMP fixed channel over L2CAP. To allow testing of this feature on Bluetooth 4.0 controller or controllers without the BR/EDR Secure Connections features, introduce a force_bredr_smp debugfs option that allows faking the required AES connection. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-12-31 14:43:16 -08:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Introduce force_bredr_smp debugfs option for testing Testing cross-transport pairing that starts on BR/EDR is only valid when using a controller with BR/EDR Secure Connections. Devices will indicate this by providing BR/EDR SMP fixed channel over L2CAP. To allow testing of this feature on Bluetooth 4.0 controller or controllers without the BR/EDR Secure Connections features, introduce a force_bredr_smp debugfs option that allows faking the required AES connection. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-12-31 14:43:16 -08:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Add paranoid check for existing LE and BR/EDR SMP channels When the SMP channels have been already registered, then print out a clear WARN_ON message that something went wrong. Also unregister the existing channels in this case before trying to register new ones. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-01-15 08:04:21 -08:00
Bluetooth: Add skeleton for BR/EDR SMP channel This patch adds the very basic code for creating and destroying SMP L2CAP channels for BR/EDR connections. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-08-13 15:12:32 +03:00
Bluetooth: Add skeleton for SMP self-tests This patch adds the initial skeleton and kernel config option for SMP self-tests. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:39 +02:00
Bluetooth: Add legacy SMP tests This patch adds self-tests for legacy SMP crypto functions. The sample data has been taken from the core specification. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:40 +02:00
Bluetooth: Add LE Secure Connections tests for SMP This patch adds SMP self-tests for the Secure Connections crypto functions. The sample data has been taken from the core specification. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:41 +02:00
Bluetooth: Export SMP selftest result in debugfs When SMP selftest is enabled, then besides printing the result into the kernel message buffer, also create a debugfs file that allows retrieving the same information. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-04-01 12:52:13 -07:00
Bluetooth: Add skeleton for SMP self-tests This patch adds the initial skeleton and kernel config option for SMP self-tests. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:39 +02:00
Bluetooth: Add timing information to SMP test case runs After successful completion of the SMP test cases, print the time it took to run them. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-12-30 00:11:20 -08:00
Bluetooth: Add legacy SMP tests This patch adds self-tests for legacy SMP crypto functions. The sample data has been taken from the core specification. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:40 +02:00
Bluetooth: Add timing information to SMP test case runs After successful completion of the SMP test cases, print the time it took to run them. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-12-30 00:11:20 -08:00
Bluetooth: Add legacy SMP tests This patch adds self-tests for legacy SMP crypto functions. The sample data has been taken from the core specification. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:40 +02:00
Bluetooth: Export SMP selftest result in debugfs When SMP selftest is enabled, then besides printing the result into the kernel message buffer, also create a debugfs file that allows retrieving the same information. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-04-01 12:52:13 -07:00
Bluetooth: Add legacy SMP tests This patch adds self-tests for legacy SMP crypto functions. The sample data has been taken from the core specification. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:40 +02:00
Bluetooth: Export SMP selftest result in debugfs When SMP selftest is enabled, then besides printing the result into the kernel message buffer, also create a debugfs file that allows retrieving the same information. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-04-01 12:52:13 -07:00
Bluetooth: Add legacy SMP tests This patch adds self-tests for legacy SMP crypto functions. The sample data has been taken from the core specification. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:40 +02:00
Bluetooth: Export SMP selftest result in debugfs When SMP selftest is enabled, then besides printing the result into the kernel message buffer, also create a debugfs file that allows retrieving the same information. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-04-01 12:52:13 -07:00
Bluetooth: Add legacy SMP tests This patch adds self-tests for legacy SMP crypto functions. The sample data has been taken from the core specification. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:40 +02:00
Bluetooth: Add LE Secure Connections tests for SMP This patch adds SMP self-tests for the Secure Connections crypto functions. The sample data has been taken from the core specification. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:41 +02:00
Bluetooth: Export SMP selftest result in debugfs When SMP selftest is enabled, then besides printing the result into the kernel message buffer, also create a debugfs file that allows retrieving the same information. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-04-01 12:52:13 -07:00
Bluetooth: Add LE Secure Connections tests for SMP This patch adds SMP self-tests for the Secure Connections crypto functions. The sample data has been taken from the core specification. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:41 +02:00
Bluetooth: Export SMP selftest result in debugfs When SMP selftest is enabled, then besides printing the result into the kernel message buffer, also create a debugfs file that allows retrieving the same information. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-04-01 12:52:13 -07:00
Bluetooth: Add LE Secure Connections tests for SMP This patch adds SMP self-tests for the Secure Connections crypto functions. The sample data has been taken from the core specification. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:41 +02:00
Bluetooth: Export SMP selftest result in debugfs When SMP selftest is enabled, then besides printing the result into the kernel message buffer, also create a debugfs file that allows retrieving the same information. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-04-01 12:52:13 -07:00
Bluetooth: Add LE Secure Connections tests for SMP This patch adds SMP self-tests for the Secure Connections crypto functions. The sample data has been taken from the core specification. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:41 +02:00
Bluetooth: Export SMP selftest result in debugfs When SMP selftest is enabled, then besides printing the result into the kernel message buffer, also create a debugfs file that allows retrieving the same information. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-04-01 12:52:13 -07:00
Bluetooth: Add LE Secure Connections tests for SMP This patch adds SMP self-tests for the Secure Connections crypto functions. The sample data has been taken from the core specification. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:41 +02:00
Bluetooth: Export SMP selftest result in debugfs When SMP selftest is enabled, then besides printing the result into the kernel message buffer, also create a debugfs file that allows retrieving the same information. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-04-01 12:52:13 -07:00
Bluetooth: Add LE Secure Connections tests for SMP This patch adds SMP self-tests for the Secure Connections crypto functions. The sample data has been taken from the core specification. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:41 +02:00
Bluetooth: Add timing information to SMP test case runs After successful completion of the SMP test cases, print the time it took to run them. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-12-30 00:11:20 -08:00
Bluetooth: Use %llu for printing duration details of selftests The duration variable for the selftests is unsigned long long and with that use %llu instead of %lld when printing the results. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-01-12 23:09:48 -08:00
Bluetooth: Add skeleton for SMP self-tests This patch adds the initial skeleton and kernel config option for SMP self-tests. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:39 +02:00
Bluetooth: Export SMP selftest result in debugfs When SMP selftest is enabled, then besides printing the result into the kernel message buffer, also create a debugfs file that allows retrieving the same information. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-04-01 12:52:13 -07:00
Bluetooth: Add skeleton for SMP self-tests This patch adds the initial skeleton and kernel config option for SMP self-tests. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-30 09:50:39 +02:00