[ Upstream commit 7a891d4b62d62566323676cb0e922ded4f37afe1 ]
MacOS and Win11 support AES256 encrytion and it is included in the cipher array of encryption context. Especially on macOS, The most preferred cipher is AES256. Connecting to ksmbd fails on newer MacOS clients that support AES256 encryption. MacOS send disconnect request after receiving final session setup response from ksmbd. Because final session setup is signed with signing key was generated incorrectly. For signging key, 'L' value should be initialized to 128 if key size is 16bytes.
Cc: stable@vger.kernel.org Reported-by: Miao Lihua 441884205@qq.com Tested-by: Miao Lihua 441884205@qq.com Signed-off-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Steve French stfrench@microsoft.com --- fs/ksmbd/auth.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/ksmbd/auth.c b/fs/ksmbd/auth.c index bad4c3af9540..df8fb076f6f1 100644 --- a/fs/ksmbd/auth.c +++ b/fs/ksmbd/auth.c @@ -730,8 +730,9 @@ static int generate_key(struct ksmbd_conn *conn, struct ksmbd_session *sess, goto smb3signkey_ret; }
- if (conn->cipher_type == SMB2_ENCRYPTION_AES256_CCM || - conn->cipher_type == SMB2_ENCRYPTION_AES256_GCM) + if (key_size == SMB3_ENC_DEC_KEY_SIZE && + (conn->cipher_type == SMB2_ENCRYPTION_AES256_CCM || + conn->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) rc = crypto_shash_update(CRYPTO_HMACSHA256(ctx), L256, 4); else rc = crypto_shash_update(CRYPTO_HMACSHA256(ctx), L128, 4);