From 4ad85bf48e9a48835b081b966e49ddc7160f4567 Mon Sep 17 00:00:00 2001
From: Volker Lendecke <vlendec@samba.org>
Date: Fri, 15 Aug 2003 02:57:59 +0000
Subject: 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)
---
 source3/utils/ntlm_auth.c | 78 +++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 68 insertions(+), 10 deletions(-)

(limited to 'source3/utils/ntlm_auth.c')

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) ||
-- 
cgit