ksmbd: add support for key exchange

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[ Upstream commit f9929ef6a2 ]

When mounting cifs client, can see the following warning message.

CIFS: decode_ntlmssp_challenge: authentication has been weakened as server
does not support key exchange

To remove this warning message, Add support for key exchange feature to
ksmbd. This patch decrypts 16-byte ciphertext value sent by the client
using RC4 with session key. The decrypted value is the recovered secondary
key that will use instead of the session key for signing and sealing.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Namjae Jeon 2023-12-19 00:32:44 +09:00 • committed by Greg Kroah-Hartman

parent 09b4c60383

commit c5049d2d73

1 changed files with 27 additions and 0 deletions

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fs/ksmbd/auth.c

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