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SMB3: Add SMB3.1.1 GCM to negotiated crypto algorigthms

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GCM is faster. Request it during negotiate protocol.
Followon patch will add callouts to GCM crypto

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
This commit is contained in:
Steve French 2019-06-07 08:59:40 -05:00
parent 06f2fca7ff
commit 9ac63ec776
3 changed files with 8 additions and 8 deletions
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4
fs/cifs/smb2ops.c
View File

@ -3376,7 +3376,7 @@ fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
tr_hdr->Flags = cpu_to_le16(0x01);
get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
}
@ -3535,7 +3535,7 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst,
goto free_sg;
}
iv[0] = 3;
memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
aead_request_set_crypt(req, sg, sg, crypt_len, iv);
aead_request_set_ad(req, assoc_data_len);

8
fs/cifs/smb2pdu.c
View File

@ -489,10 +489,10 @@ static void
build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
{
pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + le16 cipher */
pneg_ctxt->CipherCount = cpu_to_le16(1);
/* pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;*/ /* not supported yet */
pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_CCM;
pneg_ctxt->DataLength = cpu_to_le16(6); /* Cipher Count + two ciphers */
pneg_ctxt->CipherCount = cpu_to_le16(2);
pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
}
static void

4
fs/cifs/smb2pdu.h
View File

@ -123,7 +123,7 @@ struct smb2_sync_pdu {
__le16 StructureSize2; /* size of wct area (varies, request specific) */
} __packed;
#define SMB3_AES128CMM_NONCE 11
#define SMB3_AES128CCM_NONCE 11
#define SMB3_AES128GCM_NONCE 12
struct smb2_transform_hdr {
@ -293,7 +293,7 @@ struct smb2_encryption_neg_context {
__le16 DataLength;
__le32 Reserved;
__le16 CipherCount; /* AES-128-GCM and AES-128-CCM */
__le16 Ciphers[1]; /* Ciphers[0] since only one used now */
__le16 Ciphers[2];
} __packed;
/* See MS-SMB2 2.2.3.1.3 */