[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, 13 insertions, 0 deletions

diff --git a/fs/cifs/ntlmssp.h b/fs/cifs/ntlmssp.h
index 49c9a4e75319..1db0f0746a5b 100644
--- a/fs/cifs/ntlmssp.h
+++ b/fs/cifs/ntlmssp.h
@@ -61,6 +61,19 @@
 #define NTLMSSP_NEGOTIATE_KEY_XCH   0x40000000
 #define NTLMSSP_NEGOTIATE_56        0x80000000
 
+/* Define AV Pair Field IDs */
+#define NTLMSSP_AV_EOL                  0
+#define NTLMSSP_AV_NB_COMPUTER_NAME     1
+#define NTLMSSP_AV_NB_DOMAIN_NAME       2
+#define NTLMSSP_AV_DNS_COMPUTER_NAME    3
+#define NTLMSSP_AV_DNS_DOMAIN_NAME      4
+#define NTLMSSP_AV_DNS_TREE_NAME        5
+#define NTLMSSP_AV_FLAGS                6
+#define NTLMSSP_AV_TIMESTAMP            7
+#define NTLMSSP_AV_RESTRICTION          8
+#define NTLMSSP_AV_TARGET_NAME          9
+#define NTLMSSP_AV_CHANNEL_BINDINGS     10
+
 /* Although typedefs are not commonly used for structure definitions */
 /* in the Linux kernel, in this particular case they are useful      */
 /* to more closely match the standards document for NTLMSSP from     */