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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-27 08:55:01 +02:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - fix a little typo The sentence 'Based on' is misspelled, respell it. Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-08-10 11:29:33 +02:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: remove cipher routines from public crypto API The cipher routines in the crypto API are mostly intended for templates implementing skcipher modes generically in software, and shouldn't be used outside of the crypto subsystem. So move the prototypes and all related definitions to a new header file under include/crypto/internal. Also, let's use the new module namespace feature to move the symbol exports into a new namespace CRYPTO_INTERNAL. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-12-11 13:27:15 +01:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts: add interface for parallelized cipher implementations Add xts_crypt() function that can be used by cipher implementations that can benefit from parallelized cipher operations. Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2011-11-09 11:56:06 +08:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: gf128mul - switch gf128mul_x_ble to le128 Currently, gf128mul_x_ble works with pointers to be128, even though it actually interprets the words as little-endian. Consequently, it uses cpu_to_le64/le64_to_cpu on fields of type __be64, which is incorrect. This patch fixes that by changing the function to accept pointers to le128 and updating all users accordingly. Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com> Reviewd-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-04-02 21:19:14 +02:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - consolidate sanity check for keys The patch centralizes the XTS key check logic into the service function xts_check_key which is invoked from the different XTS implementations. With this, the XTS implementations in ARM, ARM64, PPC and S390 have now a sanity check for the XTS keys similar to the other arches. In addition, this service function received a check to ensure that the key != the tweak key which is mandated by FIPS 140-2 IG A.9. As the check is not present in the standards defining XTS, it is only enforced in FIPS mode of the kernel. Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-02-09 15:37:47 +01:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
Fix common misspellings Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-30 22:57:33 -03:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: remove propagation of CRYPTO_TFM_RES_* flags The CRYPTO_TFM_RES_* flags were apparently meant as a way to make the ->setkey() functions provide more information about errors. But these flags weren't actually being used or tested, and in many cases they weren't being set correctly anyway. So they've now been removed. Also, if someone ever actually needs to start better distinguishing ->setkey() errors (which is somewhat unlikely, as this has been unneeded for a long time), we'd be much better off just defining different return values, like -EINVAL if the key is invalid for the algorithm vs. -EKEYREJECTED if the key was rejected by a policy like "no weak keys". That would be much simpler, less error-prone, and easier to test. So just remove CRYPTO_TFM_RES_MASK and all the unneeded logic that propagates these flags around. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-12-30 21:19:38 -06:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: gf128mul - switch gf128mul_x_ble to le128 Currently, gf128mul_x_ble works with pointers to be128, even though it actually interprets the words as little-endian. Consequently, it uses cpu_to_le64/le64_to_cpu on fields of type __be64, which is incorrect. This patch fixes that by changing the function to accept pointers to le128 and updating all users accordingly. Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com> Reviewd-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-04-02 21:19:14 +02:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: api - Use data directly in completion function This patch does the final flag day conversion of all completion functions which are now all contained in the Crypto API. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-02-08 13:58:44 +08:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: api - Use data directly in completion function This patch does the final flag day conversion of all completion functions which are now all contained in the Crypto API. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-02-08 13:58:44 +08:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - Replace memcpy() invocation with simple assignment Colin reports that the memcpy() call in xts_cts_final() trigggers a "Overlapping buffer in memory copy" warning in Coverity, which is a false postive, given that tail is guaranteed to be smaller than or equal to the distance between source and destination. However, given that any additional bytes that we copy will be ignored anyway, we can simply copy XTS_BLOCK_SIZE unconditionally, which means we can use struct assignment of the array members instead, which is likely to be more efficient as well. Addresses-Coverity: ("Overlapping buffer in memory copy") Fixes: 8083b1bf8163 ("crypto: xts - add support for ciphertext stealing") Reported-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-21 09:05:54 +03:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: api - Use data directly in completion function This patch does the final flag day conversion of all completion functions which are now all contained in the Crypto API. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-02-08 13:58:44 +08:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: api - Use data directly in completion function This patch does the final flag day conversion of all completion functions which are now all contained in the Crypto API. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-02-08 13:58:44 +08:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - Fix atomic sleep when walking skcipher When we perform a walk in the completion function, we need to ensure that it is atomic. Reported-by: syzbot+6f72c20560060c98b566@syzkaller.appspotmail.com Fixes: 78105c7e769b ("crypto: xts - Drop use of auxiliary buffer") Cc: <stable@vger.kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-04-15 14:35:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Fix atomic sleep when walking skcipher When we perform a walk in the completion function, we need to ensure that it is atomic. Reported-by: syzbot+6f72c20560060c98b566@syzkaller.appspotmail.com Fixes: 78105c7e769b ("crypto: xts - Drop use of auxiliary buffer") Cc: <stable@vger.kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-04-15 14:35:19 +08:00
crypto: xts - Handle EBUSY correctly As it is xts only handles the special return value of EINPROGRESS, which means that in all other cases it will free data related to the request. However, as the caller of xts may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free. Fixes: 8083b1bf8163 ("crypto: xts - add support for ciphertext stealing") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-01-22 16:07:37 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Handle EBUSY correctly As it is xts only handles the special return value of EINPROGRESS, which means that in all other cases it will free data related to the request. However, as the caller of xts may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free. Fixes: 8083b1bf8163 ("crypto: xts - add support for ciphertext stealing") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-01-22 16:07:37 +08:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - Fix atomic sleep when walking skcipher When we perform a walk in the completion function, we need to ensure that it is atomic. Reported-by: syzbot+6f72c20560060c98b566@syzkaller.appspotmail.com Fixes: 78105c7e769b ("crypto: xts - Drop use of auxiliary buffer") Cc: <stable@vger.kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-04-15 14:35:19 +08:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: api - Use data directly in completion function This patch does the final flag day conversion of all completion functions which are now all contained in the Crypto API. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-02-08 13:58:44 +08:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: api - Use data directly in completion function This patch does the final flag day conversion of all completion functions which are now all contained in the Crypto API. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-02-08 13:58:44 +08:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - Handle EBUSY correctly As it is xts only handles the special return value of EINPROGRESS, which means that in all other cases it will free data related to the request. However, as the caller of xts may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free. Fixes: 8083b1bf8163 ("crypto: xts - add support for ciphertext stealing") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-01-22 16:07:37 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Handle EBUSY correctly As it is xts only handles the special return value of EINPROGRESS, which means that in all other cases it will free data related to the request. However, as the caller of xts may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free. Fixes: 8083b1bf8163 ("crypto: xts - add support for ciphertext stealing") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-01-22 16:07:37 +08:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - Drop use of auxiliary buffer Since commit acb9b159c784 ("crypto: gf128mul - define gf128mul_x_* in gf128mul.h"), the gf128mul_x_*() functions are very fast and therefore caching the computed XTS tweaks has only negligible advantage over computing them twice. In fact, since the current caching implementation limits the size of the calls to the child ecb(...) algorithm to PAGE_SIZE (usually 4096 B), it is often actually slower than the simple recomputing implementation. This patch simplifies the XTS template to recompute the XTS tweaks from scratch in the second pass and thus also removes the need to allocate a dynamic buffer using kmalloc(). As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt. PERFORMANCE RESULTS I measured time to encrypt/decrypt a memory buffer of varying sizes with xts(ecb-aes-aesni) using a tool I wrote ([2]) and the results suggest that after this patch the performance is either better or comparable for both small and large buffers. Note that there is a lot of noise in the measurements, but the overall difference is easy to see. Old code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 331 328 xts(aes) 384 64 332 333 xts(aes) 512 64 338 348 xts(aes) 256 512 889 920 xts(aes) 384 512 1019 993 xts(aes) 512 512 1032 990 xts(aes) 256 4096 2152 2292 xts(aes) 384 4096 2453 2597 xts(aes) 512 4096 3041 2641 xts(aes) 256 16384 9443 8027 xts(aes) 384 16384 8536 8925 xts(aes) 512 16384 9232 9417 xts(aes) 256 32768 16383 14897 xts(aes) 384 32768 17527 16102 xts(aes) 512 32768 18483 17322 New code: ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns) xts(aes) 256 64 328 324 xts(aes) 384 64 324 319 xts(aes) 512 64 320 322 xts(aes) 256 512 476 473 xts(aes) 384 512 509 492 xts(aes) 512 512 531 514 xts(aes) 256 4096 2132 1829 xts(aes) 384 4096 2357 2055 xts(aes) 512 4096 2178 2027 xts(aes) 256 16384 6920 6983 xts(aes) 384 16384 8597 7505 xts(aes) 512 16384 7841 8164 xts(aes) 256 32768 13468 12307 xts(aes) 384 32768 14808 13402 xts(aes) 512 32768 15753 14636 [1] https://lkml.org/lkml/2018/8/23/1315 [2] https://gitlab.com/omos/linux-crypto-bench Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-11 09:40:08 +02:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - add support for ciphertext stealing Add support for the missing ciphertext stealing part of the XTS-AES specification, which permits inputs of any size >= the block size. Cc: Pascal van Leeuwen <pvanleeuwen@verimatrix.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Tested-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09 20:14:57 +03:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - Propagate NEED_FALLBACK bit When we're used as a fallback algorithm, we should propagate the NEED_FALLBACK bit when searching for the underlying ECB mode. This just happens to fix a hang too because otherwise the search may end up loading the same module that triggered this XTS creation. Cc: stable@vger.kernel.org #4.10 Fixes: f1c131b45410 ("crypto: xts - Convert to skcipher") Reported-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-02-26 12:24:10 +08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: algapi - use common mechanism for inheriting flags The flag CRYPTO_ALG_ASYNC is "inherited" in the sense that when a template is instantiated, the template will have CRYPTO_ALG_ASYNC set if any of the algorithms it uses has CRYPTO_ALG_ASYNC set. We'd like to add a second flag (CRYPTO_ALG_ALLOCATES_MEMORY) that gets "inherited" in the same way. This is difficult because the handling of CRYPTO_ALG_ASYNC is hardcoded everywhere. Address this by: - Add CRYPTO_ALG_INHERITED_FLAGS, which contains the set of flags that have these inheritance semantics. - Add crypto_algt_inherited_mask(), for use by template ->create() methods. It returns any of these flags that the user asked to be unset and thus must be passed in the 'mask' to crypto_grab_*(). - Also modify crypto_check_attr_type() to handle computing the 'mask' so that most templates can just use this. - Make crypto_grab_*() propagate these flags to the template instance being created so that templates don't have to do this themselves. Make crypto/simd.c propagate these flags too, since it "wraps" another algorithm, similar to a template. Based on a patch by Mikulas Patocka <mpatocka@redhat.com> (https://lore.kernel.org/r/alpine.LRH.2.02.2006301414580.30526@file01.intranet.prod.int.rdu2.redhat.com). Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-09 23:20:38 -07:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: skcipher - pass instance to crypto_grab_skcipher() Initializing a crypto_skcipher_spawn currently requires: 1. Set spawn->base.inst to point to the instance. 2. Call crypto_grab_skcipher(). But there's no reason for these steps to be separate, and in fact this unneeded complication has caused at least one bug, the one fixed by commit 6db43410179b ("crypto: adiantum - initialize crypto_spawn::inst") So just make crypto_grab_skcipher() take the instance as an argument. To keep the function calls from getting too unwieldy due to this extra argument, also introduce a 'mask' variable into the affected places which weren't already using one. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-01-02 19:58:45 -08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: skcipher - pass instance to crypto_grab_skcipher() Initializing a crypto_skcipher_spawn currently requires: 1. Set spawn->base.inst to point to the instance. 2. Call crypto_grab_skcipher(). But there's no reason for these steps to be separate, and in fact this unneeded complication has caused at least one bug, the one fixed by commit 6db43410179b ("crypto: adiantum - initialize crypto_spawn::inst") So just make crypto_grab_skcipher() take the instance as an argument. To keep the function calls from getting too unwieldy due to this extra argument, also introduce a 'mask' variable into the affected places which weren't already using one. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-01-02 19:58:45 -08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - simplify error handling in ->create() Simplify the error handling in the XTS template's ->create() function by taking advantage of crypto_drop_skcipher() now accepting (as a no-op) a spawn that hasn't been grabbed yet. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-02-25 20:59:24 -08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - simplify error handling in ->create() Simplify the error handling in the XTS template's ->create() function by taking advantage of crypto_drop_skcipher() now accepting (as a no-op) a spawn that hasn't been grabbed yet. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-02-25 20:59:24 -08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - simplify error handling in ->create() Simplify the error handling in the XTS template's ->create() function by taking advantage of crypto_drop_skcipher() now accepting (as a no-op) a spawn that hasn't been grabbed yet. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-02-25 20:59:24 -08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - simplify error handling in ->create() Simplify the error handling in the XTS template's ->create() function by taking advantage of crypto_drop_skcipher() now accepting (as a no-op) a spawn that hasn't been grabbed yet. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-02-25 20:59:24 -08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - simplify error handling in ->create() Simplify the error handling in the XTS template's ->create() function by taking advantage of crypto_drop_skcipher() now accepting (as a no-op) a spawn that hasn't been grabbed yet. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-02-25 20:59:24 -08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - Fix an error handling path in 'create()' All error handling paths 'goto err_drop_spawn' except this one. In order to avoid some resources leak, we should do it as well here. Fixes: f1c131b45410 ("crypto: xts - Convert to skcipher") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-09-26 08:17:44 +02:00
crypto: xts - simplify error handling in ->create() Simplify the error handling in the XTS template's ->create() function by taking advantage of crypto_drop_skcipher() now accepting (as a no-op) a spawn that hasn't been grabbed yet. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-02-25 20:59:24 -08:00
crypto: xts - Fix an error handling path in 'create()' All error handling paths 'goto err_drop_spawn' except this one. In order to avoid some resources leak, we should do it as well here. Fixes: f1c131b45410 ("crypto: xts - Convert to skcipher") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-09-26 08:17:44 +02:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - simplify error handling in ->create() Simplify the error handling in the XTS template's ->create() function by taking advantage of crypto_drop_skcipher() now accepting (as a no-op) a spawn that hasn't been grabbed yet. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-02-25 20:59:24 -08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - simplify error handling in ->create() Simplify the error handling in the XTS template's ->create() function by taking advantage of crypto_drop_skcipher() now accepting (as a no-op) a spawn that hasn't been grabbed yet. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-02-25 20:59:24 -08:00
crypto: xts - Convert to skcipher This patch converts xts over to the skcipher interface. It also optimises the implementation to be based on ECB instead of the underlying cipher. For compatibility the existing naming scheme of xts(aes) is maintained as opposed to the more obvious one of xts(ecb(aes)). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-11-22 20:08:19 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
crypto: xts - simplify error handling in ->create() Simplify the error handling in the XTS template's ->create() function by taking advantage of crypto_drop_skcipher() now accepting (as a no-op) a spawn that hasn't been grabbed yet. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-02-25 20:59:24 -08:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: xts - prefix function and struct names with "xts" Overly-generic names can cause problems like naming collisions, confusing crash reports, and reduced grep-ability. E.g. see commit d099ea6e6fde ("crypto - Avoid free() namespace collision"). Clean this up for the xts template by prefixing the names with "xts_". (I didn't use "crypto_xts_" instead because that seems overkill.) Also constify the tfm context in a couple places, and make xts_free_instance() use the instance context structure so that it doesn't just assume the crypto_skcipher_spawn is at the beginning. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-07-10 20:34:28 -07:00
[CRYPTO] xts: XTS blockcipher mode implementation without partial blocks XTS currently considered to be the successor of the LRW mode by the IEEE1619 workgroup. LRW was discarded, because it was not secure if the encyption key itself is encrypted with LRW. XTS does not have this problem. The implementation is pretty straightforward, a new function was added to gf128mul to handle GF(128) elements in ble format. Four testvectors from the specification http://grouper.ieee.org/groups/1619/email/pdf00086.pdf were added, and they verify on my system. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-09-19 20:23:13 +08:00
crypto: include crypto- module prefix in template This adds the module loading prefix "crypto-" to the template lookup as well. For example, attempting to load 'vfat(blowfish)' via AF_ALG now correctly includes the "crypto-" prefix at every level, correctly rejecting "vfat": net-pf-38 algif-hash crypto-vfat(blowfish) crypto-vfat(blowfish)-all crypto-vfat Reported-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-11-24 16:32:38 -08:00
crypto: remove cipher routines from public crypto API The cipher routines in the crypto API are mostly intended for templates implementing skcipher modes generically in software, and shouldn't be used outside of the crypto subsystem. So move the prototypes and all related definitions to a new header file under include/crypto/internal. Also, let's use the new module namespace feature to move the symbol exports into a new namespace CRYPTO_INTERNAL. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-12-11 13:27:15 +01:00
crypto: xts - Add softdep on ecb The xts module needs ecb to be present as it's meant to work on top of ecb. This patch adds a softdep so ecb can be included automatically into the initramfs. Reported-by: rftc <rftc@gmx.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2022-02-10 13:09:40 +11:00