NTLM Authentication:

- Add a 'privileged' mode to Winbindd.  This is achieved by means of a directory
  under lockdir, that the admin can change the group access for.

- This mode is now required to access with 'CRAP' authentication feature.
- This *will* break the current SQUID helper, so I've fixed up our ntlm_auth
  replacement:
 - Update our NTLMSSP code to cope with 'datagram' mode, where we don't get a
   challenge.
 - Use this to make our ntlm_auth utility suitable for use in current Squid 2.5
   servers.
 - Tested - works for Win2k clients, but not Win9X at present.  NTLMSSP updates
   are needed.
 - Now uses fgets(), not x_fgets() to cope with Squid environment (I think
   somthing to do with non-blocking stdin).

- Add much more robust connection code to wb_common.c - it will not connect to
  a server of a different protocol version, and it will automatically try and
  reconnect to the 'privileged' pipe if possible.
  - This could help with 'privileged' idmap operations etc in future.

- Add a generic HEX encode routine to util_str.c,
- fix a small line of dodgy C in StrnCpy_fn()

- Correctly pull our 'session key' out of the info3 from th the DC.  This is
  used in both the auth code, and in for export over the winbind pipe to
  ntlm_auth.

- Given the user's challenge/response and access to the privileged pipe,
  allow external access to the 'session key'.  To be used for MSCHAPv2
  integration.

Andrew Bartlett
(This used to be commit dcdc75ebd89f504a0f6e3a3bc5b43298858d276b)

1 files changed, 32 insertions, 18 deletions

diff --git a/source3/libsmb/ntlmssp.c b/source3/libsmb/ntlmssp.c
index 5722b8efcd..0cd1ac33ec 100644
--- a/source3/libsmb/ntlmssp.c
+++ b/source3/libsmb/ntlmssp.c
@@ -121,7 +121,8 @@ static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
 {
 	DATA_BLOB struct_blob;
 	fstring dnsname, dnsdomname;
-	uint32 ntlmssp_command, neg_flags, chal_flags;
+	uint32 neg_flags = 0;
+	uint32 ntlmssp_command, chal_flags;
 	char *cliname=NULL, *domname=NULL;
 	const uint8 *cryptkey;
 	const char *target_name;
@@ -131,20 +132,24 @@ static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
 	file_save("ntlmssp_negotiate.dat", request.data, request.length);
 #endif
 
-	if (!msrpc_parse(&request, "CddAA",
-			 "NTLMSSP",
-			 &ntlmssp_command,
-			 &neg_flags,
-			 &cliname,
-			 &domname)) {
-		return NT_STATUS_INVALID_PARAMETER;
+	if (request.length) {
+		if (!msrpc_parse(&request, "CddAA",
+				 "NTLMSSP",
+				 &ntlmssp_command,
+				 &neg_flags,
+				 &cliname,
+				 &domname)) {
+			DEBUG(1, ("ntlmssp_server_negotiate: failed to parse NTLMSSP:\n"));
+			dump_data(2, request.data, request.length);
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+		
+		SAFE_FREE(cliname);
+		SAFE_FREE(domname);
+		
+		debug_ntlmssp_flags(neg_flags);
 	}
-
-	SAFE_FREE(cliname);
-	SAFE_FREE(domname);
-  
-	debug_ntlmssp_flags(neg_flags);
-
+	
 	cryptkey = ntlmssp_state->get_challenge(ntlmssp_state);
 
 	data_blob_free(&ntlmssp_state->chal);
@@ -268,6 +273,8 @@ static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
 			 &ntlmssp_state->workstation,
 			 &sess_key,
 			 &neg_flags)) {
+		DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
+		dump_data(2, request.data, request.length);
 		return NT_STATUS_INVALID_PARAMETER;
 	}
 
@@ -357,13 +364,19 @@ NTSTATUS ntlmssp_server_update(NTLMSSP_STATE *ntlmssp_state,
 	uint32 ntlmssp_command;
 	*reply = data_blob(NULL, 0);
 
-	if (!msrpc_parse(&request, "Cd",
-			 "NTLMSSP",
-			 &ntlmssp_command)) {
-		return NT_STATUS_INVALID_PARAMETER;
+	if (request.length) {
+		if (!msrpc_parse(&request, "Cd",
+				 "NTLMSSP",
+				 &ntlmssp_command)) {
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+	} else {
+		/* 'datagram' mode - no neg packet */
+		ntlmssp_command = NTLMSSP_NEGOTIATE;
 	}
 
 	if (ntlmssp_command != ntlmssp_state->expected_state) {
+		DEBUG(1, ("got NTLMSSP command %u, expected %u\n", ntlmssp_command, ntlmssp_state->expected_state));
 		return NT_STATUS_INVALID_PARAMETER;
 	}
 
@@ -372,6 +385,7 @@ NTSTATUS ntlmssp_server_update(NTLMSSP_STATE *ntlmssp_state,
 	} else if (ntlmssp_command == NTLMSSP_AUTH) {
 		return ntlmssp_server_auth(ntlmssp_state, request, reply);
 	} else {
+		DEBUG(1, ("unknown NTLMSSP command %u\n", ntlmssp_command, ntlmssp_state->expected_state));
 		return NT_STATUS_INVALID_PARAMETER;
 	}
 }