[CIFS] NTLMv2 support part 2

Still need to fill in response structure and check that hash works

Signed-off-by: Steve French <sfrench@us.ibm.com>

fs/cifs/cifsencrypt.c

@@ -306,6 +306,8 @@ void calc_lanman_hash(struct cifsSesInfo * ses, char * lnm_session_key)
 
 void CalcNTLMv2_response(const struct cifsSesInfo * ses,char * v2_session_response)
 {
+	/* BB FIXME  -  update struct ntlmv2_response and change calling convention
+	   of this function */ 
 	struct HMACMD5Context context;
 	memcpy(v2_session_response + 8, ses->server->cryptKey,8);
 	/* gen_blob(v2_session_response + 16); */

fs/cifs/cifspdu.h

@@ -117,7 +117,6 @@
  * Size of the session key (crypto key encrypted with the password
  */
 #define CIFS_SESS_KEY_SIZE (24)
-#define V2_SESS_KEY_SIZE (86)
 
 /*
  * Maximum user name length
@@ -539,7 +538,7 @@ typedef union smb_com_session_setup_andx {
 /*      unsigned char  * NativeOS;      */
 /*	unsigned char  * NativeLanMan;  */
 /*      unsigned char  * PrimaryDomain; */
-	} __attribute__((packed)) resp;			/* NTLM response format (with or without extended security */
+	} __attribute__((packed)) resp;	/* NTLM response with or without extended sec*/
 
 	struct {		/* request format */
 		struct smb_hdr hdr;	/* wct = 10 */
@@ -573,6 +572,26 @@ typedef union smb_com_session_setup_andx {
 	} __attribute__((packed)) old_resp; /* pre-NTLM (LANMAN2.1) response */
 } __attribute__((packed)) SESSION_SETUP_ANDX;
 
+/* format of NLTMv2 Response ie "case sensitive password" hash when NTLMv2 */
+
+struct ntlmssp2_name {
+	__le16 type;
+	__le16 length;
+/*	char   name[length]; */
+} __attribute__((packed));
+
+struct ntlmv2_resp {
+	char ntlmv2_hash[CIFS_ENCPWD_SIZE];
+	__le32 blob_sign;
+	__u32  reserved;
+	__le64  time;
+	__u64  client_chal; /* random */
+	__u32  reserved2;
+	struct ntlmssp2_name names[1];
+	/* array of name entries could follow ending in minimum 4 byte struct */
+} __attribute__((packed));
+
+
 #define CIFS_NETWORK_OPSYS "CIFS VFS Client for Linux"
 
 /* Capabilities bits (for NTLM SessSetup request) */
@@ -603,7 +622,9 @@ typedef struct smb_com_tconx_req {
 } __attribute__((packed)) TCONX_REQ;
 
 typedef struct smb_com_tconx_rsp {
-	struct smb_hdr hdr;	/* wct = 3 *//* note that Win2000 has sent wct=7 in some cases on responses. Four unspecified words followed OptionalSupport */
+	struct smb_hdr hdr;	/* wct = 3 note that Win2000 has sent wct = 7
+				 in some cases on responses. Four unspecified
+				 words followed OptionalSupport */
 	__u8 AndXCommand;
 	__u8 AndXReserved;
 	__le16 AndXOffset;

fs/cifs/sess.c

@@ -411,7 +411,11 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
 		else
 			ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
 	} else if (type == NTLMv2) {
-		char * v2_sess_key = kmalloc(V2_SESS_KEY_SIZE, GFP_KERNEL);
+		char * v2_sess_key = kmalloc(sizeof(struct ntlmv2_resp),
+						GFP_KERNEL);
+
+		/* BB FIXME change all users of v2_sess_key to
+		   struct ntlmv2_resp */
 
 		if(v2_sess_key == NULL) {
 			cifs_small_buf_release(smb_buf);
@@ -425,7 +429,7 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
 		/*	cpu_to_le16(LM2_SESS_KEY_SIZE); */
 
 		pSMB->req_no_secext.CaseSensitivePasswordLength =
-			cpu_to_le16(V2_SESS_KEY_SIZE);
+			cpu_to_le16(sizeof(struct ntlmv2_resp));
 
 		/* calculate session key */
 		CalcNTLMv2_response(ses, v2_sess_key);
@@ -438,8 +442,9 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
 
 	/*	memcpy(bcc_ptr, (char *)ntlm_session_key,LM2_SESS_KEY_SIZE);
 		bcc_ptr += LM2_SESS_KEY_SIZE; */
-		memcpy(bcc_ptr, (char *)v2_sess_key, V2_SESS_KEY_SIZE);
-		bcc_ptr += V2_SESS_KEY_SIZE;
+		memcpy(bcc_ptr, (char *)v2_sess_key, sizeof(struct ntlmv2_resp));
+		bcc_ptr += sizeof(struct ntlmv2_resp);
+		kfree(v2_sess_key);
 		if(ses->capabilities & CAP_UNICODE)
 			unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
 		else