X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=servers%2Fslapd%2Fbind.c;h=6480cf7fb82b5fcaa375e44e08ab3e2a9737df07;hb=0f30fb0d8f0adbbb7b41fd455c57aa56d64c9853;hp=bb9ccd3e1638a431ac888853c60f9ccad3cebadd;hpb=97bc10753776fb384d94d49608961043cb7f8b4b;p=openldap

diff --git a/servers/slapd/bind.c b/servers/slapd/bind.c
index bb9ccd3e16..6480cf7fb8 100644
--- a/servers/slapd/bind.c
+++ b/servers/slapd/bind.c
@@ -1,4 +1,9 @@
 /* bind.c - decode an ldap bind operation and pass it to a backend db */
+/* $OpenLDAP$ */
+/*
+ * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
+ * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+ */
 
 /*
  * Copyright (c) 1995 Regents of the University of Michigan.
@@ -19,14 +24,9 @@
 #include <ac/string.h>
 #include <ac/socket.h>
 
+#include "ldap_pvt.h"
 #include "slap.h"
 
-char *supportedSASLMechanisms[] = {
-	"X-CRAM-MD5",
-	"X-DIGEST-MD5",
-	NULL
-};
-
 int
 do_bind(
     Connection	*conn,
@@ -37,19 +37,42 @@ do_bind(
 	ber_int_t		version;
 	ber_tag_t method;
 	char		*mech;
-	char		*cdn, *ndn;
+	char		*dn;
+	char *ndn;
 	ber_tag_t	tag;
-	int			rc;
+	int			rc = LDAP_SUCCESS;
+	const char	*text;
 	struct berval	cred;
 	Backend		*be;
 
+#ifdef NEW_LOGGING
+	LDAP_LOG(( "operation", LDAP_LEVEL_ENTRY, "do_bind: conn %d\n", conn->c_connid ));
+#else
 	Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 );
+#endif
 
-	cdn = NULL;
+	dn = NULL;
 	ndn = NULL;
 	mech = NULL;
 	cred.bv_val = NULL;
 
+	/*
+	 * Force to connection to "anonymous" until bind succeeds.
+	 */
+	ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+	connection2anonymous( conn );
+	ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+
+	if ( op->o_dn != NULL ) {
+		free( op->o_dn );
+		op->o_dn = ch_strdup( "" );
+	}
+
+	if ( op->o_ndn != NULL ) {
+		free( op->o_ndn );
+		op->o_ndn = ch_strdup( "" );
+	}
+
 	/*
 	 * Parse the bind request.  It looks like this:
 	 *
@@ -59,20 +82,34 @@ do_bind(
 	 *		authentication	CHOICE {
 	 *			simple		[0] OCTET STRING -- passwd
 	 *			krbv42ldap	[1] OCTET STRING
-	 *			krbv42dsa	[1] OCTET STRING
+	 *			krbv42dsa	[2] OCTET STRING
+	 *			SASL		[3] SaslCredentials
 	 *		}
+	 *	}
+	 *
+	 *	SaslCredentials ::= SEQUENCE {
+     *		mechanism	    LDAPString,
+     *		credentials	    OCTET STRING OPTIONAL
 	 *	}
 	 */
 
-	tag = ber_scanf( ber, "{iat" /*}*/, &version, &cdn, &method );
+	tag = ber_scanf( ber, "{iat" /*}*/, &version, &dn, &method );
 
 	if ( tag == LBER_ERROR ) {
+#ifdef NEW_LOGGING
+		LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
+			   "do_bind: conn %d  ber_scanf failed\n", conn->c_connid ));
+#else
 		Debug( LDAP_DEBUG_ANY, "bind: ber_scanf failed\n", 0, 0, 0 );
-		send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR, NULL,
-		    "decoding error" );
+#endif
+		send_ldap_disconnect( conn, op,
+			LDAP_PROTOCOL_ERROR, "decoding error" );
+		rc = -1;
 		goto cleanup;
 	}
 
+	op->o_protocol = version;
+
 	if( method != LDAP_AUTH_SASL ) {
 		tag = ber_scanf( ber, /*{*/ "o}", &cred );
 
@@ -85,6 +122,10 @@ do_bind(
 
 			if ( tag == LDAP_TAG_LDAPCRED ) { 
 				tag = ber_scanf( ber, "o", &cred );
+			} else {
+				tag = LDAP_TAG_LDAPCRED;
+				cred.bv_val = NULL;
+				cred.bv_len = 0;
 			}
 
 			if ( tag != LBER_ERROR ) {
@@ -94,85 +135,290 @@ do_bind(
 	}
 
 	if ( tag == LBER_ERROR ) {
-		send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR, NULL,
-    		"decoding error" );
+		send_ldap_disconnect( conn, op,
+			LDAP_PROTOCOL_ERROR,
+		"decoding error" );
+		rc = SLAPD_DISCONNECT;
 		goto cleanup;
 	}
 
-#ifdef GET_CTRLS
 	if( (rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
+#ifdef NEW_LOGGING
+		LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
+			   "do_bind: conn %d  get_ctrls failed\n", conn->c_connid ));
+#else
 		Debug( LDAP_DEBUG_ANY, "do_bind: get_ctrls failed\n", 0, 0, 0 );
+#endif
 		goto cleanup;
 	} 
+
+	ndn = ch_strdup( dn );
+
+	if ( dn_normalize( ndn ) == NULL ) {
+#ifdef NEW_LOGGING
+		LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
+			   "do_bind: conn %d  invalid dn (%s)\n", conn->c_connid, dn ));
+#else
+		Debug( LDAP_DEBUG_ANY, "bind: invalid dn (%s)\n", dn, 0, 0 );
 #endif
+		send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
+		    "invalid DN", NULL, NULL );
+		goto cleanup;
+	}
 
 	if( method == LDAP_AUTH_SASL ) {
+#ifdef NEW_LOGGING
+		LDAP_LOG(( "operation",	 LDAP_LEVEL_DETAIL1,
+			   "do_sasl_bind: conn %d  dn (%s) mech %s\n", conn->c_connid,
+			   dn, mech ));
+#else
 		Debug( LDAP_DEBUG_TRACE, "do_sasl_bind: dn (%s) mech %s\n",
-			cdn, mech, NULL );
+			dn, mech, NULL );
+#endif
 	} else {
-		Debug( LDAP_DEBUG_TRACE, "do_bind: version %d dn (%s) method %d\n",
-			version, cdn, method );
+#ifdef NEW_LOGGING
+		LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
+			   "do_bind: conn %d  version=%ld dn=\"%s\" method=%ld\n",
+			   conn->c_connid, (unsigned long) version, dn, (unsigned long)method ));
+#else
+		Debug( LDAP_DEBUG_TRACE, "do_bind: version=%ld dn=\"%s\" method=%ld\n",
+			(unsigned long) version, dn, (unsigned long) method );
+#endif
 	}
 
-	ndn = dn_normalize_case( ch_strdup( cdn ) );
-
-	Statslog( LDAP_DEBUG_STATS, "conn=%d op=%d BIND dn=\"%s\" method=%d\n",
-	    conn->c_connid, op->o_opid, ndn, method, 0 );
+	Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d BIND dn=\"%s\" method=%ld\n",
+	    op->o_connid, op->o_opid, ndn, (unsigned long) method, 0 );
 
 	if ( version < LDAP_VERSION_MIN || version > LDAP_VERSION_MAX ) {
-		Debug( LDAP_DEBUG_ANY, "unknown version %d\n", version, 0, 0 );
-		send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR, NULL,
-		    "version not supported" );
+#ifdef NEW_LOGGING
+		LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
+			   "do_bind: conn %d  unknown version = %ld\n",
+			   conn->c_connid, (unsigned long)version ));
+#else
+		Debug( LDAP_DEBUG_ANY, "do_bind: unknown version=%ld\n",
+			(unsigned long) version, 0, 0 );
+#endif
+		send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR,
+			NULL, "requested protocol version not supported", NULL, NULL );
+		goto cleanup;
+
+	} else if (( global_disallows & SLAP_DISALLOW_BIND_V2 ) &&
+		version < LDAP_VERSION3 )
+	{
+		send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR,
+			NULL, "requested protocol version not allowed", NULL, NULL );
 		goto cleanup;
 	}
 
+	/* we set connection version regardless of whether bind succeeds
+	 * or not.
+	 */
+	ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+	conn->c_protocol = version;
+	ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+
 	if ( method == LDAP_AUTH_SASL ) {
+		char *edn;
+		slap_ssf_t ssf = 0;
+
 		if ( version < LDAP_VERSION3 ) {
-			Debug( LDAP_DEBUG_ANY, "do_bind: sasl with LDAPv%d\n",
-				version, 0, 0 );
-			send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR, NULL,
-				"sasl bind requires LDAPv3" );
+#ifdef NEW_LOGGING
+			LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
+				   "do_bind: conn %d  sasl with LDAPv%ld\n",
+				   conn->c_connid, (unsigned long)version ));
+#else
+			Debug( LDAP_DEBUG_ANY, "do_bind: sasl with LDAPv%ld\n",
+				(unsigned long) version, 0, 0 );
+#endif
+			send_ldap_disconnect( conn, op,
+				LDAP_PROTOCOL_ERROR, "SASL bind requires LDAPv3" );
+			rc = SLAPD_DISCONNECT;
 			goto cleanup;
 		}
 
 		if( mech == NULL || *mech == '\0' ) {
+#ifdef NEW_LOGGING
+			LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
+				   "do_bind: conn %d  no SASL mechanism provided\n",
+				   conn->c_connid ));
+#else
 			Debug( LDAP_DEBUG_ANY,
 				"do_bind: no sasl mechanism provided\n",
-				version, 0, 0 );
+				0, 0, 0 );
+#endif
 			send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED,
-				NULL, "no sasl mechanism provided" );
+				NULL, "no SASL mechanism provided", NULL, NULL );
 			goto cleanup;
 		}
 
-		if( !charray_inlist( supportedSASLMechanisms, mech ) ) {
-			Debug( LDAP_DEBUG_ANY,
-				"do_bind: sasl mechanism \"%s\" not supported.\n",
-				mech, 0, 0 );
-			send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED,
-				NULL, "sasl mechanism not supported" );
+		/* check restrictions */
+		rc = backend_check_restrictions( NULL, conn, op, mech, &text );
+		if( rc != LDAP_SUCCESS ) {
+			send_ldap_result( conn, op, rc,
+				NULL, text, NULL, NULL );
 			goto cleanup;
 		}
-	}
 
-	/* accept null binds */
-	if ( ndn == NULL || *ndn == '\0' ) {
 		ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+		if ( conn->c_sasl_bind_in_progress ) {
+			if((strcmp(conn->c_sasl_bind_mech, mech) != 0)) {
+				/* mechanism changed between bind steps */
+				slap_sasl_reset(conn);
+			}
+		} else {
+			conn->c_sasl_bind_mech = mech;
+			mech = NULL;
+		}
+		ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+
+		edn = NULL;
+		rc = slap_sasl_bind( conn, op, dn, ndn, &cred, &edn, &ssf );
+
+		ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+		if( rc == LDAP_SUCCESS ) {
+			conn->c_dn = edn;
+			conn->c_authmech = conn->c_sasl_bind_mech;
+			conn->c_sasl_bind_mech = NULL;
+			conn->c_sasl_bind_in_progress = 0;
+
+			conn->c_sasl_ssf = ssf;
+			if( ssf > conn->c_ssf ) {
+				conn->c_ssf = ssf;
+			}
+
+			if( conn->c_dn != NULL ) {
+				ber_len_t max = sockbuf_max_incoming;
+				ber_sockbuf_ctrl( conn->c_sb,
+					LBER_SB_OPT_SET_MAX_INCOMING, &max );
+			}
 
-		conn->c_protocol = version;
+		} else if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) {
+			conn->c_sasl_bind_in_progress = 1;
 
-		if ( conn->c_cdn != NULL ) {
-			free( conn->c_cdn );
-			conn->c_cdn = NULL;
+		} else {
+			if ( conn->c_sasl_bind_mech ) {
+				free( conn->c_sasl_bind_mech );
+				conn->c_sasl_bind_mech = NULL;
+			}
+			conn->c_sasl_bind_in_progress = 0;
 		}
+		ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+
+		goto cleanup;
 
-		if ( conn->c_dn != NULL ) {
-			free( conn->c_dn );
-			conn->c_dn = NULL;
+	} else {
+		/* Not SASL, cancel any in-progress bind */
+		ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+
+		if ( conn->c_sasl_bind_mech != NULL ) {
+			free(conn->c_sasl_bind_mech);
+			conn->c_sasl_bind_mech = NULL;
 		}
+		conn->c_sasl_bind_in_progress = 0;
 
+		slap_sasl_reset( conn );
 		ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+	}
+
+	if ( method == LDAP_AUTH_SIMPLE ) {
+		/* accept "anonymous" binds */
+		if ( cred.bv_len == 0 || ndn == NULL || *ndn == '\0' ) {
+			rc = LDAP_SUCCESS;
+			text = NULL;
+
+			if( cred.bv_len &&
+				( global_disallows & SLAP_DISALLOW_BIND_ANON_CRED ))
+			{
+				/* cred is not empty, disallow */
+				rc = LDAP_INVALID_CREDENTIALS;
+
+			} else if ( ndn != NULL && *ndn != '\0' &&
+				( global_disallows & SLAP_DISALLOW_BIND_ANON_DN ))
+			{
+				/* DN is not empty, disallow */
+				rc = LDAP_UNWILLING_TO_PERFORM;
+				text = "unwilling to allow anonymous bind with non-empty DN";
+
+			} else if ( global_disallows & SLAP_DISALLOW_BIND_ANON ) {
+				/* disallow */
+				rc = LDAP_INAPPROPRIATE_AUTH;
+				text = "anonymous bind disallowed";
+
+			} else {
+				rc = backend_check_restrictions( NULL, conn, op, mech, &text );
+			}
+
+			/*
+			 * we already forced connection to "anonymous",
+			 * just need to send success
+			 */
+			send_ldap_result( conn, op, rc,
+				NULL, text, NULL, NULL );
+#ifdef NEW_LOGGING
+			LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
+				   "do_bind: conn %d  v%d anonymous bind\n",
+				   conn->c_connid, version ));
+#else
+			Debug( LDAP_DEBUG_TRACE, "do_bind: v%d anonymous bind\n",
+				version, 0, 0 );
+#endif
+			goto cleanup;
+
+		} else if ( global_disallows & SLAP_DISALLOW_BIND_SIMPLE ) {
+			/* disallow simple authentication */
+			rc = LDAP_UNWILLING_TO_PERFORM;
+			text = "unwilling to perform simple authentication";
+
+			send_ldap_result( conn, op, rc,
+				NULL, text, NULL, NULL );
+#ifdef NEW_LOGGING
+			LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
+				   "do_bind: conn %d  v%d simple bind(%s) disallowed\n",
+				   conn->c_connid, version, ndn ));
+#else
+			Debug( LDAP_DEBUG_TRACE,
+				"do_bind: v%d simple bind(%s) disallowed\n",
+				version, ndn, 0 );
+#endif
+			goto cleanup;
+		}
+
+#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
+	} else if ( method == LDAP_AUTH_KRBV41 || method == LDAP_AUTH_KRBV42 ) {
+		if ( global_disallows & SLAP_DISALLOW_BIND_KRBV4 ) {
+			/* disallow simple authentication */
+			rc = LDAP_UNWILLING_TO_PERFORM;
+			text = "unwilling to perform Kerberos V4 bind";
+
+			send_ldap_result( conn, op, rc,
+				NULL, text, NULL, NULL );
+#ifdef NEW_LOGGING
+			LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
+				   "do_bind: conn %d  v%d Kerberos V4 bind\n",
+				   conn->c_connid, version ));
+#else
+			Debug( LDAP_DEBUG_TRACE, "do_bind: v%d Kerberos V4 bind\n",
+				version, 0, 0 );
+#endif
+			goto cleanup;
+		}
+#endif
 
-		send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
+	} else {
+		rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
+		text = "unknown authentication method";
+
+		send_ldap_result( conn, op, rc,
+			NULL, text, NULL, NULL );
+#ifdef NEW_LOGGING
+		LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
+			   "do_bind: conn %d  v%d unknown authentication method (%d)\n",
+			   conn->c_connid, version, method ));
+#else
+		Debug( LDAP_DEBUG_TRACE,
+			"do_bind: v%d unknown authentication method (%d)\n",
+			version, method, 0 );
+#endif
 		goto cleanup;
 	}
 
@@ -182,58 +428,51 @@ do_bind(
 	 * if we don't hold it.
 	 */
 
-	if ( (be = select_backend( ndn )) == NULL ) {
-		if ( cred.bv_len == 0 ) {
-			ldap_pvt_thread_mutex_lock( &conn->c_mutex );
-
-			conn->c_protocol = version;
-
-			if ( conn->c_cdn != NULL ) {
-				free( conn->c_cdn );
-				conn->c_cdn = NULL;
-			}
+	if ( (be = select_backend( ndn, 0 )) == NULL ) {
+		if ( default_referral ) {
+			struct berval **ref = referral_rewrite( default_referral,
+				NULL, dn, LDAP_SCOPE_DEFAULT );
 
-			if ( conn->c_dn != NULL ) {
-				free( conn->c_dn );
-				conn->c_dn = NULL;
-			}
+			send_ldap_result( conn, op, rc = LDAP_REFERRAL,
+				NULL, NULL, ref ? ref : default_referral, NULL );
 
-			ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+			ber_bvecfree( ref );
 
-			send_ldap_result( conn, op, LDAP_SUCCESS,
-				NULL, NULL );
-		} else if ( default_referral && *default_referral ) {
-			send_ldap_result( conn, op, rc = LDAP_PARTIAL_RESULTS,
-				NULL, default_referral );
 		} else {
+			/* noSuchObject is not allowed to be returned by bind */
 			send_ldap_result( conn, op, rc = LDAP_INVALID_CREDENTIALS,
-				NULL, default_referral );
+				NULL, NULL, NULL, NULL );
 		}
 
 		goto cleanup;
 	}
 
-	if ( be->be_bind ) {
-		/* alias suffix */
-		char *edn;
+	/* check restrictions */
+	rc = backend_check_restrictions( be, conn, op, NULL, &text );
+	if( rc != LDAP_SUCCESS ) {
+		send_ldap_result( conn, op, rc,
+			NULL, text, NULL, NULL );
+		goto cleanup;
+	}
 
-		ndn = suffixAlias( ndn, op, be );
+	conn->c_authz_backend = be;
 
-		if ( (*be->be_bind)( be, conn, op, ndn, method, mech, &cred, &edn ) == 0 ) {
-			ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+	if ( be->be_bind ) {
+		int ret;
+		/* alias suffix */
+		char *edn = NULL;
 
-			conn->c_protocol = version;
+		/* deref suffix alias if appropriate */
+		ndn = suffix_alias( be, ndn );
 
-			if ( conn->c_cdn != NULL ) {
-				free( conn->c_cdn );
-			}
+		ret = (*be->be_bind)( be, conn, op, dn, ndn,
+			method, &cred, &edn );
 
-			conn->c_cdn = cdn;
-			cdn = NULL;
+		if ( ret == 0 ) {
+			ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 
-			if ( conn->c_dn != NULL ) {
-				free( conn->c_dn );
-			}
+			conn->c_cdn = dn;
+			dn = NULL;
 
 			if(edn != NULL) {
 				conn->c_dn = edn;
@@ -242,26 +481,39 @@ do_bind(
 				ndn = NULL;
 			}
 
-			Debug( LDAP_DEBUG_TRACE, "do_bind: bound \"%s\" to \"%s\"\n",
-	    		conn->c_cdn, conn->c_dn, method );
+			if( conn->c_dn != NULL ) {
+				ber_len_t max = sockbuf_max_incoming;
+				ber_sockbuf_ctrl( conn->c_sb,
+					LBER_SB_OPT_SET_MAX_INCOMING, &max );
+			}
+
+#ifdef NEW_LOGGING
+			LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
+				   "do_bind: conn %d  v%d bind: \"%s\" to \"%s\" \n",
+				   conn->c_connid, version, conn->c_cdn, conn->c_dn ));
+#else
+			Debug( LDAP_DEBUG_TRACE, "do_bind: v%d bind: \"%s\" to \"%s\"\n",
+			version, conn->c_cdn, conn->c_dn );
+#endif
 
 			ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 
 			/* send this here to avoid a race condition */
-			send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
+			send_ldap_result( conn, op, LDAP_SUCCESS,
+				NULL, NULL, NULL, NULL );
 
 		} else if (edn != NULL) {
 			free( edn );
 		}
 
 	} else {
-		send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM, NULL,
-		    "Function not implemented" );
+		send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
+			NULL, "operation not supported within namingContext", NULL, NULL );
 	}
 
 cleanup:
-	if( cdn != NULL ) {
-		free( cdn );
+	if( dn != NULL ) {
+		free( dn );
 	}
 	if( ndn != NULL ) {
 		free( ndn );