Add the gss-spnego kerberos server side to ntml_auth. This uses the

same ads_verify_ticket routine that smbd uses, so in the current state
we have to be have the host password in secrets.tdb instead of the
keytab. This means we have to be an ADS member, but it's a start.

Volker
(This used to be commit dc2d2ad467927affbd1461df75f77f07ddfbc3b1)

3 files changed, 87 insertions, 12 deletions

diff --git a/source3/Makefile.in b/source3/Makefile.in
index ebf4c1abd5..4e3daa50a2 100644
--- a/source3/Makefile.in
+++ b/source3/Makefile.in
@@ -623,8 +623,11 @@ POPT_OBJS=popt/findme.o popt/popt.o popt/poptconfig.o \
 
 TDBBACKUP_OBJ = tdb/tdbbackup.o tdb/tdbback.o $(TDBBASE_OBJ)
 
-NTLM_AUTH_OBJ = utils/ntlm_auth.o $(SECRETS_OBJ) $(LIBSAMBA_OBJ) $(POPT_LIB_OBJ) \
-		libsmb/asn1.o libsmb/spnego.o libsmb/clikrb5.o libads/kerberos.o
+NTLM_AUTH_OBJ = utils/ntlm_auth.o $(LIBSAMBA_OBJ) $(POPT_LIB_OBJ) \
+		libsmb/asn1.o libsmb/spnego.o libsmb/clikrb5.o libads/kerberos.o \
+		libads/kerberos_verify.o passdb/secrets.o lib/server_mutex.o \
+		libads/authdata.o rpc_parse/parse_prs.o rpc_parse/parse_misc.o \
+		libsmb/doserr.o
 
 ######################################################################
 # now the rules...
diff --git a/source3/libsmb/spnego.c b/source3/libsmb/spnego.c
index 0b2dec7ef8..50caf7b4c0 100644
--- a/source3/libsmb/spnego.c
+++ b/source3/libsmb/spnego.c
@@ -140,8 +140,22 @@ static BOOL write_negTokenInit(ASN1_DATA *asn1, negTokenInit_t *token)
 	/* write mechListMIC */
 	if (token->mechListMIC.data) {
 		asn1_push_tag(asn1, ASN1_CONTEXT(3));
+#if 0
+		/* This is what RFC 2478 says ... */
 		asn1_write_OctetString(asn1, token->mechListMIC.data,
 				       token->mechListMIC.length);
+#else
+		/* ... but unfortunately this is what Windows
+		   sends/expects */
+		asn1_push_tag(asn1, ASN1_SEQUENCE(0));
+		asn1_push_tag(asn1, ASN1_CONTEXT(0));
+		asn1_push_tag(asn1, ASN1_GENERAL_STRING);
+		asn1_write(asn1, token->mechListMIC.data,
+			   token->mechListMIC.length);
+		asn1_pop_tag(asn1);
+		asn1_pop_tag(asn1);
+		asn1_pop_tag(asn1);
+#endif		
 		asn1_pop_tag(asn1);
 	}
 
diff --git a/source3/utils/ntlm_auth.c b/source3/utils/ntlm_auth.c
index 19d485a936..4ac125f317 100644
--- a/source3/utils/ntlm_auth.c
+++ b/source3/utils/ntlm_auth.c
@@ -361,27 +361,35 @@ static void manage_squid_basic_request(enum squid_mode squid_mode,
 static void offer_gss_spnego_mechs(void) {
 
 	DATA_BLOB token;
-	ASN1_DATA asn1;
 	SPNEGO_DATA spnego;
 	ssize_t len;
 	char *reply_base64;
 
+	pstring principal;
+	pstring myname_lower;
+
 	ZERO_STRUCT(spnego);
 
+	pstrcpy(myname_lower, global_myname());
+	strlower_m(myname_lower);
+
+	pstr_sprintf(principal, "%s$@%s", myname_lower, lp_realm());
+
 	/* Server negTokenInit (mech offerings) */
 	spnego.type = SPNEGO_NEG_TOKEN_INIT;
-	spnego.negTokenInit.mechTypes = smb_xmalloc(sizeof(char *) * 2);
+	spnego.negTokenInit.mechTypes = smb_xmalloc(sizeof(char *) * 3);
+#ifdef HAVE_KRB5
+	spnego.negTokenInit.mechTypes[0] = smb_xstrdup(OID_KERBEROS5_OLD);
+	spnego.negTokenInit.mechTypes[1] = smb_xstrdup(OID_NTLMSSP);
+	spnego.negTokenInit.mechTypes[2] = NULL;
+#else
 	spnego.negTokenInit.mechTypes[0] = smb_xstrdup(OID_NTLMSSP);
 	spnego.negTokenInit.mechTypes[1] = NULL;
+#endif
+
 
-	ZERO_STRUCT(asn1);
-	asn1_push_tag(&asn1, ASN1_SEQUENCE(0));
-	asn1_push_tag(&asn1, ASN1_CONTEXT(0));
-	asn1_write_GeneralString(&asn1, "NONE");
-	asn1_pop_tag(&asn1);
-	asn1_pop_tag(&asn1);
-	spnego.negTokenInit.mechListMIC = data_blob(asn1.data, asn1.length);
-	asn1_free(&asn1);
+	spnego.negTokenInit.mechListMIC = data_blob(principal,
+						    strlen(principal));
 
 	len = write_spnego_data(&token, &spnego);
 	free_spnego_data(&spnego);
@@ -507,6 +515,56 @@ static void manage_gss_spnego_request(enum squid_mode squid_mode,
 						       &response.negTokenTarg.responseToken);
 		}
 
+#ifdef HAVE_KRB5
+		if (strcmp(request.negTokenInit.mechTypes[0], OID_KERBEROS5_OLD) == 0) {
+
+			char *principal;
+			DATA_BLOB auth_data;
+			DATA_BLOB ap_rep;
+			uint8 session_key[16];
+
+			if ( request.negTokenInit.mechToken.data == NULL ) {
+				DEBUG(1, ("Client did not provide Kerberos data\n"));
+				x_fprintf(x_stdout, "BH\n");
+				return;
+			}
+
+			response.type = SPNEGO_NEG_TOKEN_TARG;
+			response.negTokenTarg.supportedMech = strdup(OID_KERBEROS5_OLD);
+			response.negTokenTarg.mechListMIC = data_blob(NULL, 0);
+			response.negTokenTarg.responseToken = data_blob(NULL, 0);
+
+			status = ads_verify_ticket(lp_realm(),
+						   &request.negTokenInit.mechToken,
+						   &principal, &auth_data, &ap_rep,
+						   session_key);
+
+			/* Now in "principal" we have the name we are
+                           authenticated as. */
+
+			if (NT_STATUS_IS_OK(status)) {
+
+				domain = strchr(principal, '@');
+
+				if (domain == NULL) {
+					DEBUG(1, ("Did not get a valid principal "
+						  "from ads_verify_ticket\n"));
+					x_fprintf(x_stdout, "BH\n");
+					return;
+				}
+
+				*domain++ = '\0';
+				domain = strdup(domain);
+				user = strdup(principal);
+
+				data_blob_free(&ap_rep);
+				data_blob_free(&auth_data);
+
+				SAFE_FREE(principal);
+			}
+		}
+#endif
+
 	} else {
 
 		if ( (request.negTokenTarg.supportedMech == NULL) ||