1 /* bind.c - ldap backend bind function */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 1999-2006 The OpenLDAP Foundation.
6 * Portions Copyright 2000-2003 Pierangelo Masarati.
7 * Portions Copyright 1999-2003 Howard Chu.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted only as authorized by the OpenLDAP
14 * A copy of this license is available in the file LICENSE in the
15 * top-level directory of the distribution or, alternatively, at
16 * <http://www.OpenLDAP.org/license.html>.
19 * This work was initially developed by Howard Chu for inclusion
20 * in OpenLDAP Software and subsequently enhanced by Pierangelo
29 #include <ac/socket.h>
30 #include <ac/string.h>
34 #include "back-ldap.h"
36 #include <lutil_ldap.h>
38 #define PRINT_CONNTREE 0
40 static LDAP_REBIND_PROC ldap_back_default_rebind;
42 LDAP_REBIND_PROC *ldap_back_rebind_f = ldap_back_default_rebind;
45 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
48 ldap_back_prepare_conn( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
51 ldap_back_bind( Operation *op, SlapReply *rs )
53 ldapinfo_t *li = (ldapinfo_t *) op->o_bd->be_private;
59 lc = ldap_back_getconn( op, rs, LDAP_BACK_BIND_SERR );
64 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
65 ch_free( lc->lc_bound_ndn.bv_val );
66 BER_BVZERO( &lc->lc_bound_ndn );
68 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
70 /* method is always LDAP_AUTH_SIMPLE if we got here */
71 rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
73 &op->orb_cred, op->o_ctrls, NULL, &msgid );
74 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_SENDERR );
76 if ( rc == LDAP_SUCCESS ) {
77 /* If defined, proxyAuthz will be used also when
78 * back-ldap is the authorizing backend; for this
79 * purpose, a successful bind is followed by a
80 * bind with the configured identity assertion */
81 /* NOTE: use with care */
82 if ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
83 ldap_back_proxy_authz_bind( lc, op, rs, LDAP_BACK_SENDERR );
84 if ( !LDAP_BACK_CONN_ISBOUND( lc ) ) {
90 LDAP_BACK_CONN_ISBOUND_SET( lc );
91 ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
93 if ( LDAP_BACK_SAVECRED( li ) ) {
94 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
95 memset( lc->lc_cred.bv_val, 0,
98 ber_bvreplace( &lc->lc_cred, &op->orb_cred );
99 ldap_set_rebind_proc( lc->lc_ld, ldap_back_rebind_f, lc );
104 /* must re-insert if local DN changed as result of bind */
105 if ( LDAP_BACK_CONN_ISBOUND( lc )
106 && !dn_match( &op->o_req_ndn, &lc->lc_local_ndn ) )
110 /* wait for all other ops to release the connection */
112 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
113 if ( lc->lc_refcnt > 1 ) {
114 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
115 ldap_pvt_thread_yield();
119 assert( lc->lc_refcnt == 1 );
120 lc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
121 ldap_back_conn_cmp );
122 assert( lc != NULL );
124 ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn );
125 lerr = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
126 ldap_back_conn_cmp, ldap_back_conn_dup );
127 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
129 /* we can do this because lc_refcnt == 1 */
130 ldap_back_conn_free( lc );
136 ldap_back_release_conn( op, rs, lc );
145 * compares two ldapconn_t based on the value of the conn pointer;
149 ldap_back_conn_cmp( const void *c1, const void *c2 )
151 const ldapconn_t *lc1 = (const ldapconn_t *)c1;
152 const ldapconn_t *lc2 = (const ldapconn_t *)c2;
155 /* If local DNs don't match, it is definitely not a match */
156 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
161 /* For shared sessions, conn is NULL. Only explicitly
162 * bound sessions will have non-NULL conn.
164 return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
170 * returns -1 in case a duplicate ldapconn_t has been inserted;
174 ldap_back_conn_dup( void *c1, void *c2 )
176 ldapconn_t *lc1 = (ldapconn_t *)c1;
177 ldapconn_t *lc2 = (ldapconn_t *)c2;
179 /* Cannot have more than one shared session with same DN */
180 if ( dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) &&
181 lc1->lc_conn == lc2->lc_conn )
189 #if PRINT_CONNTREE > 0
191 ravl_print( Avlnode *root, int depth )
200 ravl_print( root->avl_right, depth+1 );
202 for ( i = 0; i < depth; i++ ) {
207 printf( "lc(%lx) local(%s) conn(%lx) %d\n",
208 lc, lc->lc_local_ndn.bv_val, lc->lc_conn, root->avl_bf );
210 ravl_print( root->avl_left, depth+1 );
214 myprint( Avlnode *root )
216 printf( "********\n" );
219 printf( "\tNULL\n" );
222 ravl_print( root, 0 );
225 printf( "********\n" );
227 #endif /* PRINT_CONNTREE */
230 ldap_back_freeconn( Operation *op, ldapconn_t *lc, int dolock )
232 ldapinfo_t *li = (ldapinfo_t *) op->o_bd->be_private;
235 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
238 assert( lc->lc_refcnt > 0 );
239 if ( --lc->lc_refcnt == 0 ) {
240 lc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
241 ldap_back_conn_cmp );
242 assert( lc != NULL );
244 ldap_back_conn_free( (void *)lc );
248 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
265 int rc = LDAP_SUCCESS;
268 /* this is ridiculous... */
269 dummy.li_flags = flags;
271 /* start TLS ("tls-[try-]{start,propagate}" statements) */
272 if ( ( LDAP_BACK_USE_TLS( &dummy ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS( &dummy ) ) )
273 && !ldap_is_ldaps_url( url ) )
275 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
277 * use asynchronous StartTLS
278 * in case, chase referral (not implemented yet)
282 if ( protocol == 0 ) {
283 ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION,
287 if ( protocol < LDAP_VERSION3 ) {
288 protocol = LDAP_VERSION3;
289 /* Set LDAP version */
290 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION,
291 (const void *)&protocol );
294 rc = ldap_start_tls( ld, NULL, NULL, &msgid );
295 if ( rc == LDAP_SUCCESS ) {
296 LDAPMessage *res = NULL;
299 LDAP_BACK_TV_SET( &tv );
302 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
304 rc = LDAP_UNAVAILABLE;
306 } else if ( rc == 0 ) {
307 if ( retries != LDAP_BACK_RETRY_NEVER ) {
308 ldap_pvt_thread_yield();
312 LDAP_BACK_TV_SET( &tv );
315 rc = LDAP_UNAVAILABLE;
317 } else if ( rc == LDAP_RES_EXTENDED ) {
318 struct berval *data = NULL;
320 rc = ldap_parse_extended_result( ld, res,
322 if ( rc == LDAP_SUCCESS ) {
324 rc = ldap_parse_result( ld, res, &err,
325 NULL, NULL, NULL, NULL, 1 );
326 if ( rc == LDAP_SUCCESS ) {
331 /* FIXME: in case a referral
332 * is returned, should we try
333 * using it instead of the
335 if ( rc == LDAP_SUCCESS ) {
336 rc = ldap_install_tls( ld );
338 } else if ( rc == LDAP_REFERRAL ) {
339 rc = LDAP_UNWILLING_TO_PERFORM;
340 *text = "unwilling to chase referral returned by Start TLS exop";
344 if ( data->bv_val ) {
345 ber_memfree( data->bv_val );
359 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
361 * use synchronous StartTLS
363 rc = ldap_start_tls_s( ld, NULL, NULL );
364 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
366 /* if StartTLS is requested, only attempt it if the URL
367 * is not "ldaps://"; this may occur not only in case
368 * of misconfiguration, but also when used in the chain
369 * overlay, where the "uri" can be parsed out of a referral */
375 case LDAP_SERVER_DOWN:
379 if ( LDAP_BACK_TLS_CRITICAL( &dummy ) ) {
380 *text = "could not start TLS";
384 /* in case Start TLS is not critical */
396 #endif /* HAVE_TLS */
399 ldap_back_prepare_conn( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
401 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
402 int vers = op->o_protocol;
405 int is_tls = op->o_conn->c_is_tls;
406 #endif /* HAVE_TLS */
408 assert( lcp != NULL );
410 rs->sr_err = ldap_initialize( &ld, li->li_uri );
411 if ( rs->sr_err != LDAP_SUCCESS ) {
415 /* Set LDAP version. This will always succeed: If the client
416 * bound with a particular version, then so can we.
419 /* assume it's an internal op; set to LDAPv3 */
420 vers = LDAP_VERSION3;
422 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&vers );
424 /* automatically chase referrals ("[dont-]chase-referrals" statement) */
425 if ( LDAP_BACK_CHASE_REFERRALS( li ) ) {
426 ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
430 rs->sr_err = ldap_back_start_tls( ld, op->o_protocol, &is_tls,
431 li->li_uri, li->li_flags, li->li_nretries, &rs->sr_text );
432 if ( rs->sr_err != LDAP_SUCCESS ) {
433 ldap_unbind_ext( ld, NULL, NULL );
436 #endif /* HAVE_TLS */
438 if ( *lcp == NULL ) {
439 *lcp = (ldapconn_t *)ch_calloc( 1, sizeof( ldapconn_t ) );
440 (*lcp)->lc_flags= li->li_flags;
443 (*lcp)->lc_refcnt = 1;
446 LDAP_BACK_CONN_ISTLS_SET( *lcp );
448 LDAP_BACK_CONN_ISTLS_CLEAR( *lcp );
450 #endif /* HAVE_TLS */
453 if ( rs->sr_err != LDAP_SUCCESS ) {
454 rs->sr_err = slap_map_api2result( rs );
455 if ( sendok & LDAP_BACK_SENDERR ) {
456 if ( rs->sr_text == NULL ) {
457 rs->sr_text = "ldap_initialize() failed";
459 send_ldap_result( op, rs );
468 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
470 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
471 ldapconn_t *lc = NULL,
475 /* Internal searches are privileged and shared. So is root. */
476 if ( op->o_do_not_cache || be_isroot( op ) ) {
477 LDAP_BACK_CONN_ISPRIV_SET( &lc_curr );
478 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
479 lc_curr.lc_conn = LDAP_BACK_PCONN_SET( op );
482 lc_curr.lc_local_ndn = op->o_ndn;
483 /* Explicit binds must not be shared */
484 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
485 lc_curr.lc_conn = op->o_conn;
488 lc_curr.lc_conn = LDAP_BACK_PCONN_SET( op );
492 /* Explicit Bind requests always get their own conn */
493 if ( !( sendok & LDAP_BACK_BINDING ) ) {
494 /* Searches for a ldapconn in the avl tree */
496 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
498 lc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
499 (caddr_t)&lc_curr, ldap_back_conn_cmp );
501 /* Don't reuse connections while they're still binding */
502 if ( LDAP_BACK_CONN_BINDING( lc ) ) {
503 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
504 ldap_pvt_thread_yield();
507 refcnt = ++lc->lc_refcnt;
509 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
512 /* Looks like we didn't get a bind. Open a new session... */
514 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
517 if ( sendok & LDAP_BACK_BINDING ) {
518 LDAP_BACK_CONN_BINDING_SET( lc );
520 lc->lc_conn = lc_curr.lc_conn;
521 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
523 if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) {
524 ber_dupbv( &lc->lc_cred, &li->li_acl_passwd );
525 ber_dupbv( &lc->lc_bound_ndn, &li->li_acl_authcDN );
526 LDAP_BACK_CONN_ISPRIV_SET( lc );
529 BER_BVZERO( &lc->lc_cred );
530 BER_BVZERO( &lc->lc_bound_ndn );
532 /* FIXME: if we set lc_bound_ndn = o_ndn
533 * we end up with a bind with DN but no password! */
534 if ( !BER_BVISEMPTY( &op->o_ndn )
535 && SLAP_IS_AUTHZ_BACKEND( op ) )
537 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
543 /* if start TLS failed but it was not mandatory,
544 * check if the non-TLS connection was already
545 * in cache; in case, destroy the newly created
546 * connection and use the existing one */
547 if ( lc->lc_conn == LDAP_BACK_PCONN_TLS
548 && !ldap_tls_inplace( lc->lc_ld ) )
552 lc_curr.lc_conn = LDAP_BACK_PCONN;
553 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
554 tmplc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
555 (caddr_t)&lc_curr, ldap_back_conn_cmp );
556 if ( tmplc != NULL ) {
557 refcnt = ++tmplc->lc_refcnt;
558 ldap_back_conn_free( lc );
561 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
563 if ( tmplc != NULL ) {
567 #endif /* HAVE_TLS */
569 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
571 /* Inserts the newly created ldapconn in the avl tree */
572 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
574 assert( lc->lc_refcnt == 1 );
575 rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
576 ldap_back_conn_cmp, ldap_back_conn_dup );
578 #if PRINT_CONNTREE > 0
579 myprint( li->li_conninfo.lai_tree );
580 #endif /* PRINT_CONNTREE */
582 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
584 Debug( LDAP_DEBUG_TRACE,
585 "=>ldap_back_getconn: conn %p inserted (refcnt=%u)\n",
586 (void *)lc, refcnt, 0 );
588 /* Err could be -1 in case a duplicate ldapconn is inserted */
589 if ( rs->sr_err != 0 ) {
590 ldap_back_conn_free( lc );
591 rs->sr_err = LDAP_OTHER;
592 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
593 send_ldap_error( op, rs, LDAP_OTHER,
594 "internal server error" );
600 if ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout ) {
601 /* in case of failure, it frees/taints lc and sets it to NULL */
602 if ( ldap_back_retry( &lc, op, rs, sendok ) ) {
608 Debug( LDAP_DEBUG_TRACE,
609 "=>ldap_back_getconn: conn %p fetched (refcnt=%u)\n",
610 (void *)lc, refcnt, 0 );
614 if ( li->li_idle_timeout && lc ) {
615 lc->lc_time = op->o_time;
623 ldap_back_release_conn_lock(
629 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
632 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
634 assert( lc->lc_refcnt > 0 );
636 LDAP_BACK_CONN_BINDING_CLEAR( lc );
638 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
645 * Note: as the check for the value of lc->lc_bound was already here, I removed
646 * it from all the callers, and I made the function return the flag, so
647 * it can be used to simplify the check.
649 * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
652 ldap_back_dobind_int(
656 ldap_back_send_t sendok,
660 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
662 int rc = LDAP_BACK_CONN_ISBOUND( lc );
665 assert( retries >= 0 );
671 while ( lc->lc_refcnt > 1 ) {
672 ldap_pvt_thread_yield();
673 rc = LDAP_BACK_CONN_ISBOUND( lc );
680 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
682 LDAP_BACK_CONN_BINDING_SET( lc );
684 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
688 * FIXME: we need to let clients use proxyAuthz
689 * otherwise we cannot do symmetric pools of servers;
690 * we have to live with the fact that a user can
691 * authorize itself as any ID that is allowed
692 * by the authzTo directive of the "proxyauthzdn".
695 * NOTE: current Proxy Authorization specification
696 * and implementation do not allow proxy authorization
697 * control to be provided with Bind requests
700 * if no bind took place yet, but the connection is bound
701 * and the "idassert-authcDN" (or other ID) is set,
702 * then bind as the asserting identity and explicitly
703 * add the proxyAuthz control to every operation with the
704 * dn bound to the connection as control value.
705 * This is done also if this is the authrizing backend,
706 * but the "override" flag is given to idassert.
707 * It allows to use SASL bind and yet proxyAuthz users
709 if ( op->o_conn != NULL &&
710 !op->o_do_not_cache &&
711 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
712 ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
714 (void)ldap_back_proxy_authz_bind( lc, op, rs, sendok );
718 #ifdef HAVE_CYRUS_SASL
719 if ( LDAP_BACK_CONN_ISPRIV( lc )
720 && li->li_acl_authmethod == LDAP_AUTH_SASL )
722 void *defaults = NULL;
724 if ( li->li_acl_secprops != NULL ) {
725 rc = ldap_set_option( lc->lc_ld,
726 LDAP_OPT_X_SASL_SECPROPS, li->li_acl_secprops);
728 if ( rc != LDAP_OPT_SUCCESS ) {
729 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
730 "(%s,SECPROPS,\"%s\") failed!\n",
731 li->li_uri, li->li_acl_secprops, 0 );
736 defaults = lutil_sasl_defaults( lc->lc_ld,
737 li->li_acl_sasl_mech.bv_val,
738 li->li_acl_sasl_realm.bv_val,
739 li->li_acl_authcID.bv_val,
740 li->li_acl_passwd.bv_val,
743 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
744 li->li_acl_authcDN.bv_val,
745 li->li_acl_sasl_mech.bv_val, NULL, NULL,
746 LDAP_SASL_QUIET, lutil_sasl_interact,
749 lutil_sasl_freedefs( defaults );
751 rs->sr_err = slap_map_api2result( rs );
752 if ( rs->sr_err != LDAP_SUCCESS ) {
753 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
754 send_ldap_result( op, rs );
757 LDAP_BACK_CONN_ISBOUND_SET( lc );
761 #endif /* HAVE_CYRUS_SASL */
764 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
765 lc->lc_bound_ndn.bv_val,
766 LDAP_SASL_SIMPLE, &lc->lc_cred,
767 NULL, NULL, &msgid );
769 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
770 if ( retries != LDAP_BACK_RETRY_NEVER ) {
772 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
775 assert( lc->lc_refcnt > 0 );
776 if ( lc->lc_refcnt == 1 ) {
777 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
780 /* lc here must be the regular lc, reset and ready for init */
781 rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
784 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
786 if ( rs->sr_err == LDAP_SUCCESS ) {
794 ldap_back_freeconn( op, lc, dolock );
795 rs->sr_err = slap_map_api2result( rs );
800 rc = ldap_back_op_result( lc, op, rs, msgid, 0, sendok );
801 if ( rc == LDAP_SUCCESS ) {
802 LDAP_BACK_CONN_ISBOUND_SET( lc );
806 LDAP_BACK_CONN_BINDING_CLEAR( lc );
807 rc = LDAP_BACK_CONN_ISBOUND( lc );
809 ldap_back_release_conn_lock( op, rs, lc, dolock );
816 ldap_back_dobind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
818 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
820 return ldap_back_dobind_int( lc, op, rs, sendok, li->li_nretries, 1 );
824 * ldap_back_default_rebind
826 * This is a callback used for chasing referrals using the same
827 * credentials as the original user on this session.
830 ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
831 ber_int_t msgid, void *params )
833 ldapconn_t *lc = (ldapconn_t *)params;
836 /* ... otherwise we couldn't get here */
837 assert( lc != NULL );
839 if ( !ldap_tls_inplace( ld ) ) {
840 int is_tls = LDAP_BACK_CONN_ISTLS( lc ),
842 const char *text = NULL;
844 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
845 LDAP_BACK_RETRY_DEFAULT, &text );
846 if ( rc != LDAP_SUCCESS ) {
850 #endif /* HAVE_TLS */
852 /* FIXME: add checks on the URL/identity? */
854 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
855 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
865 ldap_back_send_t sendok )
868 LDAPMessage *res = NULL;
871 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
874 rs->sr_matched = NULL;
876 /* if the error recorded in the reply corresponds
877 * to a successful state, get the error from the
878 * remote server response */
879 if ( ERR_OK( rs->sr_err ) ) {
888 LDAP_BACK_TV_SET( &tv );
892 /* if result parsing fails, note the failure reason */
893 rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
897 (void)ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
898 rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
899 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OPERATIONS_ERROR;
900 rs->sr_text = "Operation timed out";
904 LDAP_BACK_TV_SET( &tv );
905 ldap_pvt_thread_yield();
909 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
914 /* otherwise get the result; if it is not
915 * LDAP_SUCCESS, record it in the reply
916 * structure (this includes
917 * LDAP_COMPARE_{TRUE|FALSE}) */
919 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
920 &match, &text, NULL, NULL, 1 );
921 #ifndef LDAP_NULL_IS_NULL
922 if ( match != NULL && match[ 0 ] == '\0' ) {
923 ldap_memfree( match );
926 if ( text != NULL && text[ 0 ] == '\0' ) {
927 ldap_memfree( text );
930 #endif /* LDAP_NULL_IS_NULL */
932 if ( rc != LDAP_SUCCESS ) {
938 /* if the error in the reply structure is not
939 * LDAP_SUCCESS, try to map it from client
941 if ( !ERR_OK( rs->sr_err ) ) {
942 rs->sr_err = slap_map_api2result( rs );
944 /* internal ops ( op->o_conn == NULL )
945 * must not reply to client */
946 if ( op->o_conn && !op->o_do_not_cache && match ) {
948 /* record the (massaged) matched
949 * DN into the reply structure */
950 rs->sr_matched = match;
954 ( ( sendok & LDAP_BACK_SENDOK )
955 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
957 send_ldap_result( op, rs );
960 if ( rs->sr_matched != match ) {
961 free( (char *)rs->sr_matched );
963 rs->sr_matched = NULL;
964 ldap_memfree( match );
967 ldap_memfree( text );
970 return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
973 /* return true if bound, false if failed */
975 ldap_back_retry( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
978 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
980 assert( lcp != NULL );
981 assert( *lcp != NULL );
983 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
985 if ( (*lcp)->lc_refcnt == 1 ) {
986 Debug( LDAP_DEBUG_ANY,
987 "%s ldap_back_retry: retrying URI=\"%s\" DN=\"%s\"\n",
988 op->o_log_prefix, li->li_uri,
989 BER_BVISNULL( &(*lcp)->lc_bound_ndn ) ?
990 "" : (*lcp)->lc_bound_ndn.bv_val );
992 ldap_unbind_ext( (*lcp)->lc_ld, NULL, NULL );
993 (*lcp)->lc_ld = NULL;
994 LDAP_BACK_CONN_ISBOUND_CLEAR( (*lcp) );
996 /* lc here must be the regular lc, reset and ready for init */
997 rc = ldap_back_prepare_conn( lcp, op, rs, sendok );
998 if ( rc != LDAP_SUCCESS ) {
1003 rc = ldap_back_dobind_int( *lcp, op, rs, sendok, 0, 0 );
1010 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1016 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1018 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
1019 struct berval binddn = slap_empty_bv;
1020 struct berval bindcred = slap_empty_bv;
1026 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1027 ndn = op->o_conn->c_ndn;
1034 * FIXME: we need to let clients use proxyAuthz
1035 * otherwise we cannot do symmetric pools of servers;
1036 * we have to live with the fact that a user can
1037 * authorize itself as any ID that is allowed
1038 * by the authzTo directive of the "proxyauthzdn".
1041 * NOTE: current Proxy Authorization specification
1042 * and implementation do not allow proxy authorization
1043 * control to be provided with Bind requests
1046 * if no bind took place yet, but the connection is bound
1047 * and the "proxyauthzdn" is set, then bind as
1048 * "proxyauthzdn" and explicitly add the proxyAuthz
1049 * control to every operation with the dn bound
1050 * to the connection as control value.
1053 /* bind as proxyauthzdn only if no idassert mode
1054 * is requested, or if the client's identity
1056 switch ( li->li_idassert_mode ) {
1057 case LDAP_BACK_IDASSERT_LEGACY:
1058 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1059 if ( !BER_BVISNULL( &li->li_idassert_authcDN ) && !BER_BVISEMPTY( &li->li_idassert_authcDN ) )
1061 binddn = li->li_idassert_authcDN;
1062 bindcred = li->li_idassert_passwd;
1069 /* NOTE: rootdn can always idassert */
1070 if ( BER_BVISNULL( &ndn ) && li->li_idassert_authz == NULL ) {
1071 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1072 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1073 if ( sendok & LDAP_BACK_SENDERR ) {
1074 send_ldap_result( op, rs );
1076 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1079 rs->sr_err = LDAP_SUCCESS;
1080 binddn = slap_empty_bv;
1081 bindcred = slap_empty_bv;
1087 } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1088 struct berval authcDN;
1090 if ( BER_BVISNULL( &ndn ) ) {
1091 authcDN = slap_empty_bv;
1096 rs->sr_err = slap_sasl_matches( op, li->li_idassert_authz,
1097 &authcDN, &authcDN );
1098 if ( rs->sr_err != LDAP_SUCCESS ) {
1099 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1100 if ( sendok & LDAP_BACK_SENDERR ) {
1101 send_ldap_result( op, rs );
1103 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1106 rs->sr_err = LDAP_SUCCESS;
1107 binddn = slap_empty_bv;
1108 bindcred = slap_empty_bv;
1116 binddn = li->li_idassert_authcDN;
1117 bindcred = li->li_idassert_passwd;
1122 if ( dobind && li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1123 #ifdef HAVE_CYRUS_SASL
1124 void *defaults = NULL;
1125 struct berval authzID = BER_BVNULL;
1128 /* if SASL supports native authz, prepare for it */
1129 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1130 ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1132 switch ( li->li_idassert_mode ) {
1133 case LDAP_BACK_IDASSERT_OTHERID:
1134 case LDAP_BACK_IDASSERT_OTHERDN:
1135 authzID = li->li_idassert_authzID;
1138 case LDAP_BACK_IDASSERT_ANONYMOUS:
1139 BER_BVSTR( &authzID, "dn:" );
1142 case LDAP_BACK_IDASSERT_SELF:
1143 if ( BER_BVISNULL( &ndn ) ) {
1144 /* connection is not authc'd, so don't idassert */
1145 BER_BVSTR( &authzID, "dn:" );
1148 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1149 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1150 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1151 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1152 ndn.bv_val, ndn.bv_len + 1 );
1161 if ( li->li_idassert_secprops != NULL ) {
1162 rs->sr_err = ldap_set_option( lc->lc_ld,
1163 LDAP_OPT_X_SASL_SECPROPS,
1164 (void *)li->li_idassert_secprops );
1166 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1167 rs->sr_err = LDAP_OTHER;
1168 if ( sendok & LDAP_BACK_SENDERR ) {
1169 send_ldap_result( op, rs );
1171 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1176 defaults = lutil_sasl_defaults( lc->lc_ld,
1177 li->li_idassert_sasl_mech.bv_val,
1178 li->li_idassert_sasl_realm.bv_val,
1179 li->li_idassert_authcID.bv_val,
1180 li->li_idassert_passwd.bv_val,
1183 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
1184 li->li_idassert_sasl_mech.bv_val, NULL, NULL,
1185 LDAP_SASL_QUIET, lutil_sasl_interact,
1188 rs->sr_err = slap_map_api2result( rs );
1189 if ( rs->sr_err != LDAP_SUCCESS ) {
1190 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1191 if ( sendok & LDAP_BACK_SENDERR ) {
1192 send_ldap_result( op, rs );
1196 LDAP_BACK_CONN_ISBOUND_SET( lc );
1199 lutil_sasl_freedefs( defaults );
1201 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1205 #endif /* HAVE_CYRUS_SASL */
1208 switch ( li->li_idassert_authmethod ) {
1209 case LDAP_AUTH_NONE:
1210 LDAP_BACK_CONN_ISBOUND_SET( lc );
1213 case LDAP_AUTH_SIMPLE:
1214 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1215 binddn.bv_val, LDAP_SASL_SIMPLE,
1216 &bindcred, NULL, NULL, &msgid );
1221 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1222 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1223 if ( sendok & LDAP_BACK_SENDERR ) {
1224 send_ldap_result( op, rs );
1229 rc = ldap_back_op_result( lc, op, rs, msgid, 0, sendok );
1230 if ( rc == LDAP_SUCCESS ) {
1231 LDAP_BACK_CONN_ISBOUND_SET( lc );
1234 return LDAP_BACK_CONN_ISBOUND( lc );
1238 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
1239 * to existing server-side controls if required; if not,
1240 * the existing server-side controls are placed in *pctrls.
1241 * The caller, after using the controls in client API
1242 * operations, if ( *pctrls != op->o_ctrls ), should
1243 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
1244 * The function returns success if the control could
1245 * be added if required, or if it did nothing; in the future,
1246 * it might return some error if it failed.
1248 * if no bind took place yet, but the connection is bound
1249 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
1250 * and explicitly add proxyAuthz the control to every operation
1251 * with the dn bound to the connection as control value.
1253 * If no server-side controls are defined for the operation,
1254 * simply add the proxyAuthz control; otherwise, if the
1255 * proxyAuthz control is not already set, add it as
1258 * FIXME: is controls order significant for security?
1259 * ANSWER: controls ordering and interoperability
1260 * must be indicated by the specs of each control; if none
1261 * is specified, the order is irrelevant.
1264 ldap_back_proxy_authz_ctrl(
1268 LDAPControl ***pctrls )
1270 ldapinfo_t *li = (ldapinfo_t *) op->o_bd->be_private;
1271 LDAPControl **ctrls = NULL;
1274 struct berval assertedID,
1279 rs->sr_err = LDAP_SUCCESS;
1281 /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
1282 * but if it is not set this test fails. We need a different
1283 * means to detect if idassert is enabled */
1284 if ( ( BER_BVISNULL( &li->li_idassert_authcID ) || BER_BVISEMPTY( &li->li_idassert_authcID ) )
1285 && ( BER_BVISNULL( &li->li_idassert_authcDN ) || BER_BVISEMPTY( &li->li_idassert_authcDN ) ) )
1290 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
1294 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1295 ndn = op->o_conn->c_ndn;
1301 if ( li->li_idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
1302 if ( op->o_proxy_authz ) {
1304 * FIXME: we do not want to perform proxyAuthz
1305 * on behalf of the client, because this would
1306 * be performed with "proxyauthzdn" privileges.
1308 * This might actually be too strict, since
1309 * the "proxyauthzdn" authzTo, and each entry's
1310 * authzFrom attributes may be crafted
1311 * to avoid unwanted proxyAuthz to take place.
1314 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1315 rs->sr_text = "proxyAuthz not allowed within namingContext";
1320 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1324 if ( BER_BVISNULL( &ndn ) ) {
1328 if ( BER_BVISNULL( &li->li_idassert_authcDN ) ) {
1332 } else if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1333 if ( ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1334 /* && ( !BER_BVISNULL( &ndn )
1335 || LDAP_BACK_CONN_ISBOUND( lc ) ) */ )
1337 /* already asserted in SASL via native authz */
1338 /* NOTE: the test on lc->lc_bound is used to trap
1339 * native authorization of anonymous users,
1340 * since in that case ndn is NULL */
1344 } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1346 struct berval authcDN;
1348 if ( BER_BVISNULL( &ndn ) ) {
1349 authcDN = slap_empty_bv;
1353 rc = slap_sasl_matches( op, li->li_idassert_authz,
1354 &authcDN, & authcDN );
1355 if ( rc != LDAP_SUCCESS ) {
1356 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
1358 /* ndn is not authorized
1359 * to use idassert */
1366 if ( op->o_proxy_authz ) {
1369 * 1) ignore the already set proxyAuthz control
1370 * 2) leave it in place, and don't set ours
1372 * 4) reject the operation
1374 * option (4) is very drastic
1375 * option (3) will make the remote server reject
1376 * the operation, thus being equivalent to (4)
1377 * option (2) will likely break the idassert
1378 * assumptions, so we cannot accept it;
1379 * option (1) means that we are contradicting
1380 * the client's reques.
1382 * I think (4) is the only correct choice.
1384 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1385 rs->sr_text = "proxyAuthz not allowed within namingContext";
1388 if ( op->o_is_auth_check ) {
1389 mode = LDAP_BACK_IDASSERT_NOASSERT;
1392 mode = li->li_idassert_mode;
1396 case LDAP_BACK_IDASSERT_SELF:
1397 if ( BER_BVISNULL( &ndn ) ) {
1403 case LDAP_BACK_IDASSERT_LEGACY:
1404 /* original behavior:
1405 * assert the client's identity */
1406 if ( BER_BVISNULL( &ndn ) ) {
1407 assertedID = slap_empty_bv;
1413 case LDAP_BACK_IDASSERT_ANONYMOUS:
1414 /* assert "anonymous" */
1415 assertedID = slap_empty_bv;
1418 case LDAP_BACK_IDASSERT_NOASSERT:
1419 /* don't assert; bind as proxyauthzdn */
1422 case LDAP_BACK_IDASSERT_OTHERID:
1423 case LDAP_BACK_IDASSERT_OTHERDN:
1424 /* assert idassert DN */
1425 assertedID = li->li_idassert_authzID;
1432 if ( BER_BVISNULL( &assertedID ) ) {
1433 assertedID = slap_empty_bv;
1436 if ( op->o_ctrls ) {
1437 for ( i = 0; op->o_ctrls[ i ]; i++ )
1438 /* just count ctrls */ ;
1441 ctrls = op->o_tmpalloc( sizeof( LDAPControl * ) * (i + 2) + sizeof( LDAPControl ),
1443 ctrls[ 0 ] = (LDAPControl *)&ctrls[ i + 2 ];
1445 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1446 ctrls[ 0 ]->ldctl_iscritical = 1;
1448 switch ( li->li_idassert_mode ) {
1449 /* already in u:ID or dn:DN form */
1450 case LDAP_BACK_IDASSERT_OTHERID:
1451 case LDAP_BACK_IDASSERT_OTHERDN:
1452 ber_dupbv_x( &ctrls[ 0 ]->ldctl_value, &assertedID, op->o_tmpmemctx );
1455 /* needs the dn: prefix */
1457 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1458 ctrls[ 0 ]->ldctl_value.bv_val = op->o_tmpalloc( ctrls[ 0 ]->ldctl_value.bv_len + 1,
1460 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1461 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
1462 assertedID.bv_val, assertedID.bv_len + 1 );
1466 if ( op->o_ctrls ) {
1467 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1468 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1471 ctrls[ i + 1 ] = NULL;
1474 if ( ctrls == NULL ) {
1475 ctrls = op->o_ctrls;
1484 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1486 LDAPControl **ctrls = *pctrls;
1488 /* we assume that the first control is the proxyAuthz
1489 * added by back-ldap, so it's the only one we explicitly
1491 if ( ctrls && ctrls != op->o_ctrls ) {
1492 assert( ctrls[ 0 ] != NULL );
1494 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1495 op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
1498 op->o_tmpfree( ctrls, op->o_tmpmemctx );