[CIFS] Fix ntlmv2 auth with ntlmssp

Make ntlmv2 as an authentication mechanism within ntlmssp
instead of ntlmv1.
Parse type 2 response in ntlmssp negotiation to pluck
AV pairs and use them to calculate ntlmv2 response token.
Also, assign domain name from the sever response in type 2
packet of ntlmssp and use that (netbios) domain name in
calculation of response.

Enable cifs/smb signing using rc4 and md5.

Changed name of the structure mac_key to session_key to reflect
the type of key it holds.

Use kernel crypto_shash_* APIs instead of the equivalent cifs functions.

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 446e248..18af707 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1707,6 +1707,7 @@ cifs_put_smb_ses(struct cifsSesInfo *ses)
 		CIFSSMBLogoff(xid, ses);
 		_FreeXid(xid);
 	}
+	cifs_crypto_shash_release(server);
 	sesInfoFree(ses);
 	cifs_put_tcp_session(server);
 }
@@ -1786,13 +1787,23 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
 	ses->linux_uid = volume_info->linux_uid;
 	ses->overrideSecFlg = volume_info->secFlg;
 
+	rc = cifs_crypto_shash_allocate(server);
+	if (rc) {
+		cERROR(1, "could not setup hash structures rc %d", rc);
+		goto get_ses_fail;
+	}
+	server->tilen = 0;
+	server->tiblob = NULL;
+
 	mutex_lock(&ses->session_mutex);
 	rc = cifs_negotiate_protocol(xid, ses);
 	if (!rc)
 		rc = cifs_setup_session(xid, ses, volume_info->local_nls);
 	mutex_unlock(&ses->session_mutex);
-	if (rc)
+	if (rc) {
+		cifs_crypto_shash_release(ses->server);
 		goto get_ses_fail;
+	}
 
 	/* success, put it on the list */
 	write_lock(&cifs_tcp_ses_lock);