[CIFS] Cleanup NTLMSSP session setup handling

Fix to hash NTLMv2 properly will follow.

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

fs/cifs/CHANGES

@@ -1,3 +1,9 @@
+Version 1.41
+------------
+Fix NTLMv2 security (can be enabled in /proc/fs/cifs) so customers can
+configure stronger authentication.  Fix sfu symlinks so they can
+be followed (not just recognized).
+
 Version 1.40
 ------------
 Use fsuid (fsgid) more consistently instead of uid (gid). Improve performance

fs/cifs/cifsencrypt.c

@@ -1,7 +1,7 @@
 /*
  *   fs/cifs/cifsencrypt.c
  *
- *   Copyright (C) International Business Machines  Corp., 2005
+ *   Copyright (C) International Business Machines  Corp., 2005,2006
  *   Author(s): Steve French (sfrench@us.ibm.com)
  *
  *   This library is free software; you can redistribute it and/or modify
@@ -36,7 +36,8 @@
 extern void mdfour(unsigned char *out, unsigned char *in, int n);
 extern void E_md4hash(const unsigned char *passwd, unsigned char *p16);
 	
-static int cifs_calculate_signature(const struct smb_hdr * cifs_pdu, const char * key, char * signature)
+static int cifs_calculate_signature(const struct smb_hdr * cifs_pdu, 
+				    const char * key, char * signature)
 {
 	struct	MD5Context context;
 

fs/cifs/cifsfs.h

@@ -99,5 +99,5 @@ extern ssize_t	cifs_getxattr(struct dentry *, const char *, void *, size_t);
 extern ssize_t	cifs_listxattr(struct dentry *, char *, size_t);
 extern int cifs_ioctl (struct inode * inode, struct file * filep,
 		       unsigned int command, unsigned long arg);
-#define CIFS_VERSION   "1.40"
+#define CIFS_VERSION   "1.41"
 #endif				/* _CIFSFS_H */

fs/cifs/cifsproto.h

@@ -64,6 +64,8 @@ extern int map_smb_to_linux_error(struct smb_hdr *smb);
 extern void header_assemble(struct smb_hdr *, char /* command */ ,
 			    const struct cifsTconInfo *, int /* length of
 			    fixed section (word count) in two byte units */);
+extern int small_smb_init_no_tc(int smb_cmd, int wct, struct cifsSesInfo *ses,
+				void ** request_buf);
 extern __u16 GetNextMid(struct TCP_Server_Info *server);
 extern struct oplock_q_entry * AllocOplockQEntry(struct inode *, u16, 
 						 struct cifsTconInfo *);

fs/cifs/cifssmb.c

@@ -1,7 +1,7 @@
 /*
  *   fs/cifs/cifssmb.c
  *
- *   Copyright (C) International Business Machines  Corp., 2002,2005
+ *   Copyright (C) International Business Machines  Corp., 2002,2006
  *   Author(s): Steve French (sfrench@us.ibm.com)
  *
  *   Contains the routines for constructing the SMB PDUs themselves
@@ -187,6 +187,31 @@ small_smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
 
 	return rc;
 }  
+int
+small_smb_init_no_tcon(int smb_command, int wct, struct cifsSesInfo *ses,
+		       void **request_buf)
+{
+	int rc;
+	struct smb_hdr * buffer;
+
+	rc = small_smb_init(smb_command, wct, 0, request_buf);
+	if(rc)
+		return rc;
+
+	buffer->Mid = GetNextMid(ses->server);
+	if (ses->capabilities & CAP_UNICODE)
+		buffer->Flags2 |= SMBFLG2_UNICODE;
+	if (ses->capabilities & CAP_STATUS32) {
+		buffer->Flags2 |= SMBFLG2_ERR_STATUS;
+
+	/* uid, tid can stay at zero as set in header assemble */
+
+	/* BB add support for turning on the signing when 
+	this function is used after 1st of session setup requests */
+
+	return rc;
+}
+
 
 /* If the return code is zero, this function must fill in request_buf pointer */
 static int

fs/cifs/connect.c

@@ -2525,7 +2525,7 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
 	__u32 negotiate_flags, capabilities;
 	__u16 count;
 
-	cFYI(1, ("In NTLMSSP sesssetup (negotiate) "));
+	cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
 	if(ses == NULL)
 		return -EINVAL;
 	domain = ses->domainName;
@@ -2575,7 +2575,8 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
 	SecurityBlob->MessageType = NtLmNegotiate;
 	negotiate_flags =
 	    NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
-	    NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM | 0x80000000 |
+	    NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
+	    NTLMSSP_NEGOTIATE_56 |
 	    /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
 	if(sign_CIFS_PDUs)
 		negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
@@ -2588,26 +2589,11 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
 	SecurityBlob->WorkstationName.Length = 0;
 	SecurityBlob->WorkstationName.MaximumLength = 0;
 
-	if (domain == NULL) {
+	/* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
-		SecurityBlob->DomainName.Buffer = 0;
+	along with username on auth request (ie the response to challenge) */
-		SecurityBlob->DomainName.Length = 0;
+	SecurityBlob->DomainName.Buffer = 0;
-		SecurityBlob->DomainName.MaximumLength = 0;
+	SecurityBlob->DomainName.Length = 0;
-	} else {
+	SecurityBlob->DomainName.MaximumLength = 0;
-		__u16 len;
-		negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
-		strncpy(bcc_ptr, domain, 63);
-		len = strnlen(domain, 64);
-		SecurityBlob->DomainName.MaximumLength =
-		    cpu_to_le16(len);
-		SecurityBlob->DomainName.Buffer =
-		    cpu_to_le32((long) &SecurityBlob->
-				DomainString -
-				(long) &SecurityBlob->Signature);
-		bcc_ptr += len;
-		SecurityBlobLength += len;
-		SecurityBlob->DomainName.Length =
-		    cpu_to_le16(len);
-	}
 	if (ses->capabilities & CAP_UNICODE) {
 		if ((long) bcc_ptr % 2) {
 			*bcc_ptr = 0;
@@ -2677,7 +2663,7 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
 			      SecurityBlob2->MessageType));
 		} else if (ses) {
 			ses->Suid = smb_buffer_response->Uid; /* UID left in le format */ 
-			cFYI(1, ("UID = %d ", ses->Suid));
+			cFYI(1, ("UID = %d", ses->Suid));
 			if ((pSMBr->resp.hdr.WordCount == 3)
 			    || ((pSMBr->resp.hdr.WordCount == 4)
 				&& (blob_len <
@@ -2685,17 +2671,17 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
 
 				if (pSMBr->resp.hdr.WordCount == 4) {
 					bcc_ptr += blob_len;
-					cFYI(1,
+					cFYI(1, ("Security Blob Length %d",
-					     ("Security Blob Length %d ",
 					      blob_len));
 				}
 
-				cFYI(1, ("NTLMSSP Challenge rcvd "));
+				cFYI(1, ("NTLMSSP Challenge rcvd"));
 
 				memcpy(ses->server->cryptKey,
 				       SecurityBlob2->Challenge,
 				       CIFS_CRYPTO_KEY_SIZE);
-				if(SecurityBlob2->NegotiateFlags & cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
+				if(SecurityBlob2->NegotiateFlags & 
+					cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
 					*pNTLMv2_flag = TRUE;
 
 				if((SecurityBlob2->NegotiateFlags & 
@@ -2818,7 +2804,7 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
 						bcc_ptr++;
 					} else
 						cFYI(1,
-						     ("Variable field of length %d extends beyond end of smb ",
+						     ("Variable field of length %d extends beyond end of smb",
 						      len));
 				}
 			} else {

fs/cifs/ntlmssp.h

@@ -1,7 +1,7 @@
 /*
  *   fs/cifs/ntlmssp.h
  *
- *   Copyright (c) International Business Machines  Corp., 2002
+ *   Copyright (c) International Business Machines  Corp., 2002,2006
  *   Author(s): Steve French (sfrench@us.ibm.com)
  *
  *   This library is free software; you can redistribute it and/or modify