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 #ifndef PRINT_CONNTREE
39 #define PRINT_CONNTREE 0
40 #endif /* !PRINT_CONNTREE */
42 #define LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ "2.16.840.1.113730.3.4.12"
44 #if PRINT_CONNTREE > 0
46 ravl_print( Avlnode *root, int depth )
55 ravl_print( root->avl_right, depth+1 );
57 for ( i = 0; i < depth; i++ ) {
58 fprintf( stderr, "-" );
62 fprintf( stderr, "lc=%p local=\"%s\" conn=%p %s refcnt=%d\n",
64 lc->lc_local_ndn.bv_val ? lc->lc_local_ndn.bv_val : "",
66 avl_bf2str( root->avl_bf ), lc->lc_refcnt );
68 ravl_print( root->avl_left, depth+1 );
72 myprint( Avlnode *root, char *msg )
74 fprintf( stderr, "========> %s\n", msg );
77 fprintf( stderr, "\tNULL\n" );
80 ravl_print( root, 0 );
83 fprintf( stderr, "<======== %s\n", msg );
85 #endif /* PRINT_CONNTREE */
88 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
91 ldap_back_prepare_conn( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
94 ldap_back_conndnlc_cmp( const void *c1, const void *c2 );
97 ldap_back_bind( Operation *op, SlapReply *rs )
99 ldapinfo_t *li = (ldapinfo_t *) op->o_bd->be_private;
105 lc = ldap_back_getconn( op, rs, LDAP_BACK_BIND_SERR );
110 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
111 ch_free( lc->lc_bound_ndn.bv_val );
112 BER_BVZERO( &lc->lc_bound_ndn );
114 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
116 /* method is always LDAP_AUTH_SIMPLE if we got here */
117 rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
119 &op->orb_cred, op->o_ctrls, NULL, &msgid );
120 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_SENDERR );
122 if ( rc == LDAP_SUCCESS ) {
123 /* If defined, proxyAuthz will be used also when
124 * back-ldap is the authorizing backend; for this
125 * purpose, a successful bind is followed by a
126 * bind with the configured identity assertion */
127 /* NOTE: use with care */
128 if ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
129 ldap_back_proxy_authz_bind( lc, op, rs, LDAP_BACK_SENDERR );
130 if ( !LDAP_BACK_CONN_ISBOUND( lc ) ) {
136 /* rebind is now done inside ldap_back_proxy_authz_bind()
137 * in case of success */
138 LDAP_BACK_CONN_ISBOUND_SET( lc );
139 ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
141 if ( LDAP_BACK_SAVECRED( li ) ) {
142 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
143 memset( lc->lc_cred.bv_val, 0,
144 lc->lc_cred.bv_len );
146 ber_bvreplace( &lc->lc_cred, &op->orb_cred );
147 ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
152 assert( lc->lc_binding == 1 );
155 /* must re-insert if local DN changed as result of bind */
156 if ( !LDAP_BACK_CONN_ISBOUND( lc )
157 || ( LDAP_BACK_CONN_ISBOUND( lc )
158 && !dn_match( &op->o_req_ndn, &lc->lc_local_ndn ) ) )
163 /* wait for all other ops to release the connection */
165 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
166 if ( lc->lc_refcnt > 1 ) {
167 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
168 ldap_pvt_thread_yield();
172 assert( lc->lc_refcnt == 1 );
173 tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
174 ldap_back_conndnlc_cmp );
175 assert( tmplc == NULL || lc == tmplc );
177 /* delete all cached connections with the current connection */
178 if ( LDAP_BACK_SINGLECONN( li ) ) {
179 while ( ( tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc, ldap_back_conn_cmp ) ) != NULL )
181 Debug( LDAP_DEBUG_TRACE,
182 "=>ldap_back_bind: destroying conn %ld (refcnt=%u)\n",
183 LDAP_BACK_PCONN_ID( lc->lc_conn ), lc->lc_refcnt, 0 );
185 if ( lc->lc_refcnt != 0 ) {
187 LDAP_BACK_CONN_TAINTED_SET( tmplc );
191 * Needs a test because the handler may be corrupted,
192 * and calling ldap_unbind on a corrupted header results
193 * in a segmentation fault
195 ldap_back_conn_free( tmplc );
200 if ( LDAP_BACK_CONN_ISBOUND( lc ) ) {
201 ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn );
202 if ( be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
203 lc->lc_conn = LDAP_BACK_PCONN_SET( op );
205 lerr = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
206 ldap_back_conndn_cmp, ldap_back_conndn_dup );
209 #if PRINT_CONNTREE > 0
210 myprint( li->li_conninfo.lai_tree, "ldap_back_bind" );
211 #endif /* PRINT_CONNTREE */
213 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
219 /* duplicate; someone else successfully bound
220 * on the same connection with the same identity;
221 * we can do this because lc_refcnt == 1 */
222 ldap_back_conn_free( lc );
228 ldap_back_release_conn( op, rs, lc );
235 * ldap_back_conndn_cmp
237 * compares two ldapconn_t based on the value of the conn pointer
238 * and of the local DN; used by avl stuff for insert, lookup
242 ldap_back_conndn_cmp( const void *c1, const void *c2 )
244 const ldapconn_t *lc1 = (const ldapconn_t *)c1;
245 const ldapconn_t *lc2 = (const ldapconn_t *)c2;
248 /* If local DNs don't match, it is definitely not a match */
249 /* For shared sessions, conn is NULL. Only explicitly
250 * bound sessions will have non-NULL conn.
252 rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
254 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
261 * ldap_back_conndnlc_cmp
263 * compares two ldapconn_t based on the value of the conn pointer,
264 * the local DN and the lc pointer; used by avl stuff for insert, lookup
268 ldap_back_conndnlc_cmp( const void *c1, const void *c2 )
270 const ldapconn_t *lc1 = (const ldapconn_t *)c1;
271 const ldapconn_t *lc2 = (const ldapconn_t *)c2;
274 /* If local DNs don't match, it is definitely not a match */
275 /* For shared sessions, conn is NULL. Only explicitly
276 * bound sessions will have non-NULL conn.
278 rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
280 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
282 rc = SLAP_PTRCMP( lc1, lc2 );
292 * compares two ldapconn_t based on the value of the conn pointer;
293 * used by avl stuff for delete of all conns with the same connid
296 ldap_back_conn_cmp( const void *c1, const void *c2 )
298 const ldapconn_t *lc1 = (const ldapconn_t *)c1;
299 const ldapconn_t *lc2 = (const ldapconn_t *)c2;
301 /* For shared sessions, conn is NULL. Only explicitly
302 * bound sessions will have non-NULL conn.
304 return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
308 * ldap_back_conndn_dup
310 * returns -1 in case a duplicate ldapconn_t has been inserted;
314 ldap_back_conndn_dup( void *c1, void *c2 )
316 ldapconn_t *lc1 = (ldapconn_t *)c1;
317 ldapconn_t *lc2 = (ldapconn_t *)c2;
319 /* Cannot have more than one shared session with same DN */
320 if ( lc1->lc_conn == lc2->lc_conn &&
321 dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) )
330 ldap_back_freeconn( Operation *op, ldapconn_t *lc, int dolock )
332 ldapinfo_t *li = (ldapinfo_t *) op->o_bd->be_private;
336 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
339 tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
340 ldap_back_conndnlc_cmp );
341 assert( LDAP_BACK_CONN_TAINTED( lc ) || tmplc == lc );
342 if ( lc->lc_refcnt == 0 ) {
343 ldap_back_conn_free( (void *)lc );
347 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
364 int rc = LDAP_SUCCESS;
367 /* this is ridiculous... */
368 dummy.li_flags = flags;
370 /* start TLS ("tls-[try-]{start,propagate}" statements) */
371 if ( ( LDAP_BACK_USE_TLS( &dummy ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS( &dummy ) ) )
372 && !ldap_is_ldaps_url( url ) )
374 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
376 * use asynchronous StartTLS
377 * in case, chase referral (not implemented yet)
381 if ( protocol == 0 ) {
382 ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION,
386 if ( protocol < LDAP_VERSION3 ) {
387 /* we should rather bail out... */
388 rc = LDAP_UNWILLING_TO_PERFORM;
389 *text = "invalid protocol version";
392 if ( rc == LDAP_SUCCESS ) {
393 rc = ldap_start_tls( ld, NULL, NULL, &msgid );
396 if ( rc == LDAP_SUCCESS ) {
397 LDAPMessage *res = NULL;
400 LDAP_BACK_TV_SET( &tv );
403 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
405 rc = LDAP_UNAVAILABLE;
407 } else if ( rc == 0 ) {
408 if ( retries != LDAP_BACK_RETRY_NEVER ) {
409 ldap_pvt_thread_yield();
413 LDAP_BACK_TV_SET( &tv );
416 rc = LDAP_UNAVAILABLE;
418 } else if ( rc == LDAP_RES_EXTENDED ) {
419 struct berval *data = NULL;
421 rc = ldap_parse_extended_result( ld, res,
423 if ( rc == LDAP_SUCCESS ) {
425 rc = ldap_parse_result( ld, res, &err,
426 NULL, NULL, NULL, NULL, 1 );
427 if ( rc == LDAP_SUCCESS ) {
432 /* FIXME: in case a referral
433 * is returned, should we try
434 * using it instead of the
436 if ( rc == LDAP_SUCCESS ) {
437 rc = ldap_install_tls( ld );
439 } else if ( rc == LDAP_REFERRAL ) {
440 rc = LDAP_UNWILLING_TO_PERFORM;
441 *text = "unwilling to chase referral returned by Start TLS exop";
445 if ( data->bv_val ) {
446 ber_memfree( data->bv_val );
460 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
462 * use synchronous StartTLS
464 rc = ldap_start_tls_s( ld, NULL, NULL );
465 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
467 /* if StartTLS is requested, only attempt it if the URL
468 * is not "ldaps://"; this may occur not only in case
469 * of misconfiguration, but also when used in the chain
470 * overlay, where the "uri" can be parsed out of a referral */
476 case LDAP_SERVER_DOWN:
480 if ( LDAP_BACK_TLS_CRITICAL( &dummy ) ) {
481 *text = "could not start TLS";
485 /* in case Start TLS is not critical */
497 #endif /* HAVE_TLS */
500 ldap_back_prepare_conn( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
502 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
506 int is_tls = op->o_conn->c_is_tls;
507 #endif /* HAVE_TLS */
509 assert( lcp != NULL );
511 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
512 rs->sr_err = ldap_initialize( &ld, li->li_uri );
513 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
514 if ( rs->sr_err != LDAP_SUCCESS ) {
518 if ( li->li_urllist_f ) {
519 ldap_set_urllist_proc( ld, li->li_urllist_f, li->li_urllist_p );
522 /* Set LDAP version. This will always succeed: If the client
523 * bound with a particular version, then so can we.
525 if ( li->li_version != 0 ) {
526 version = li->li_version;
528 } else if ( op->o_protocol != 0 ) {
529 version = op->o_protocol;
532 /* assume it's an internal op; set to LDAPv3 */
533 version = LDAP_VERSION3;
535 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&version );
537 /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
538 ldap_set_option( ld, LDAP_OPT_REFERRALS,
539 LDAP_BACK_CHASE_REFERRALS( li ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
541 if ( li->li_network_timeout > 0 ) {
544 tv.tv_sec = li->li_network_timeout;
546 ldap_set_option( ld, LDAP_OPT_NETWORK_TIMEOUT, (const void *)&tv );
550 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
551 rs->sr_err = ldap_back_start_tls( ld, op->o_protocol, &is_tls,
552 li->li_uri, li->li_flags, li->li_nretries, &rs->sr_text );
553 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
554 if ( rs->sr_err != LDAP_SUCCESS ) {
555 ldap_unbind_ext( ld, NULL, NULL );
558 #endif /* HAVE_TLS */
560 if ( *lcp == NULL ) {
561 *lcp = (ldapconn_t *)ch_calloc( 1, sizeof( ldapconn_t ) );
562 (*lcp)->lc_flags = li->li_flags;
565 (*lcp)->lc_refcnt = 1;
566 (*lcp)->lc_binding = 1;
569 LDAP_BACK_CONN_ISTLS_SET( *lcp );
571 LDAP_BACK_CONN_ISTLS_CLEAR( *lcp );
573 #endif /* HAVE_TLS */
576 if ( rs->sr_err != LDAP_SUCCESS ) {
577 rs->sr_err = slap_map_api2result( rs );
578 if ( sendok & LDAP_BACK_SENDERR ) {
579 if ( rs->sr_text == NULL ) {
580 rs->sr_text = "ldap_initialize() failed";
582 send_ldap_result( op, rs );
587 if ( li->li_conn_ttl > 0 ) {
588 (*lcp)->lc_create_time = op->o_time;
596 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
598 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
599 ldapconn_t *lc = NULL,
601 int refcnt = 1, binding = 1;
603 /* Internal searches are privileged and shared. So is root. */
604 if ( op->o_do_not_cache || be_isroot( op ) ) {
605 LDAP_BACK_CONN_ISPRIV_SET( &lc_curr );
606 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
607 lc_curr.lc_conn = LDAP_BACK_PCONN_SET( op );
610 lc_curr.lc_local_ndn = op->o_ndn;
611 /* Explicit binds must not be shared */
612 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
613 lc_curr.lc_conn = op->o_conn;
616 lc_curr.lc_conn = LDAP_BACK_PCONN_SET( op );
620 /* Explicit Bind requests always get their own conn */
621 if ( !( sendok & LDAP_BACK_BINDING ) ) {
622 /* Searches for a ldapconn in the avl tree */
624 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
626 lc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
627 (caddr_t)&lc_curr, ldap_back_conndn_cmp );
629 /* Don't reuse connections while they're still binding */
630 if ( LDAP_BACK_CONN_BINDING( lc ) ) {
631 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
632 ldap_pvt_thread_yield();
635 refcnt = ++lc->lc_refcnt;
636 binding = ++lc->lc_binding;
638 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
641 /* Looks like we didn't get a bind. Open a new session... */
643 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
646 if ( sendok & LDAP_BACK_BINDING ) {
647 LDAP_BACK_CONN_BINDING_SET( lc );
649 lc->lc_conn = lc_curr.lc_conn;
650 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
652 if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) {
653 ber_dupbv( &lc->lc_cred, &li->li_acl_passwd );
654 ber_dupbv( &lc->lc_bound_ndn, &li->li_acl_authcDN );
655 LDAP_BACK_CONN_ISPRIV_SET( lc );
658 BER_BVZERO( &lc->lc_cred );
659 BER_BVZERO( &lc->lc_bound_ndn );
661 /* FIXME: if we set lc_bound_ndn = o_ndn
662 * we end up with a bind with DN but no password! */
663 if ( !BER_BVISEMPTY( &op->o_ndn )
664 && SLAP_IS_AUTHZ_BACKEND( op ) )
666 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
672 /* if start TLS failed but it was not mandatory,
673 * check if the non-TLS connection was already
674 * in cache; in case, destroy the newly created
675 * connection and use the existing one */
676 if ( lc->lc_conn == LDAP_BACK_PCONN_TLS
677 && !ldap_tls_inplace( lc->lc_ld ) )
681 lc_curr.lc_conn = LDAP_BACK_PCONN;
682 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
683 tmplc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
684 (caddr_t)&lc_curr, ldap_back_conndn_cmp );
685 if ( tmplc != NULL ) {
686 refcnt = ++tmplc->lc_refcnt;
687 binding = ++tmplc->lc_binding;
688 ldap_back_conn_free( lc );
691 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
693 if ( tmplc != NULL ) {
697 #endif /* HAVE_TLS */
699 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
701 /* Inserts the newly created ldapconn in the avl tree */
702 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
704 assert( lc->lc_refcnt == 1 );
705 assert( lc->lc_binding == 1 );
706 rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
707 ldap_back_conndn_cmp, ldap_back_conndn_dup );
709 #if PRINT_CONNTREE > 0
710 myprint( li->li_conninfo.lai_tree, "ldap_back_getconn" );
711 #endif /* PRINT_CONNTREE */
713 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
715 Debug( LDAP_DEBUG_TRACE,
716 "=>ldap_back_getconn: conn %p inserted refcnt=%u binding=%u\n",
717 (void *)lc, refcnt, binding );
719 /* Err could be -1 in case a duplicate ldapconn is inserted */
720 switch ( rs->sr_err ) {
725 if ( !( sendok & LDAP_BACK_BINDING ) ) {
726 /* duplicate: free and try to get the newly created one */
729 /* taint connection, so that it'll be freed when released */
730 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
731 (void *)avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
732 ldap_back_conndnlc_cmp );
733 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
734 LDAP_BACK_CONN_TAINTED_SET( lc );
738 ldap_back_conn_free( lc );
739 rs->sr_err = LDAP_OTHER;
740 rs->sr_text = "proxy bind collision";
741 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
742 send_ldap_result( op, rs );
749 char buf[ SLAP_TEXT_BUFLEN ];
752 if ( ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout )
753 || ( li->li_conn_ttl != 0 && op->o_time > lc->lc_create_time + li->li_conn_ttl ) )
757 /* let it be used, but taint/delete it so that
758 * no-one else can look it up any further */
759 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
760 (void *)avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
761 ldap_back_conndnlc_cmp );
762 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
763 LDAP_BACK_CONN_TAINTED_SET( lc );
766 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
767 snprintf( buf, sizeof( buf ),
768 "conn %p fetched refcnt=%u binding=%u%s",
769 (void *)lc, refcnt, binding, expiring ? " expiring" : "" );
770 Debug( LDAP_DEBUG_TRACE,
771 "=>ldap_back_getconn: %s.\n", buf, 0, 0 );
778 #endif /* HAVE_TLS */
779 if ( li->li_idle_timeout && lc ) {
780 lc->lc_time = op->o_time;
787 ldap_back_release_conn_lock(
793 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
796 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
798 assert( lc->lc_refcnt > 0 );
799 LDAP_BACK_CONN_BINDING_CLEAR( lc );
801 if ( LDAP_BACK_CONN_TAINTED( lc ) ) {
802 ldap_back_freeconn( op, lc, 0 );
805 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
812 * Note: as the check for the value of lc->lc_bound was already here, I removed
813 * it from all the callers, and I made the function return the flag, so
814 * it can be used to simplify the check.
816 * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
819 ldap_back_dobind_int(
823 ldap_back_send_t sendok,
827 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
832 assert( retries >= 0 );
836 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
839 if ( binding == 0 ) {
840 /* check if already bound */
841 rc = LDAP_BACK_CONN_ISBOUND( lc );
845 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
850 if ( LDAP_BACK_CONN_BINDING( lc ) ) {
851 /* if someone else is about to bind it, give up and retry */
853 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
855 ldap_pvt_thread_yield();
859 /* otherwise this thread will bind it */
860 LDAP_BACK_CONN_BINDING_SET( lc );
865 /* wait for pending operations to finish */
866 /* FIXME: may become a bottleneck! */
867 if ( lc->lc_refcnt != lc->lc_binding ) {
869 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
871 ldap_pvt_thread_yield();
876 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
880 while ( lc->lc_refcnt > 1 ) {
881 ldap_pvt_thread_yield();
882 rc = LDAP_BACK_CONN_ISBOUND( lc );
889 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
891 LDAP_BACK_CONN_BINDING_SET( lc );
893 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
898 * FIXME: we need to let clients use proxyAuthz
899 * otherwise we cannot do symmetric pools of servers;
900 * we have to live with the fact that a user can
901 * authorize itself as any ID that is allowed
902 * by the authzTo directive of the "proxyauthzdn".
905 * NOTE: current Proxy Authorization specification
906 * and implementation do not allow proxy authorization
907 * control to be provided with Bind requests
910 * if no bind took place yet, but the connection is bound
911 * and the "idassert-authcDN" (or other ID) is set,
912 * then bind as the asserting identity and explicitly
913 * add the proxyAuthz control to every operation with the
914 * dn bound to the connection as control value.
915 * This is done also if this is the authrizing backend,
916 * but the "override" flag is given to idassert.
917 * It allows to use SASL bind and yet proxyAuthz users
919 if ( op->o_conn != NULL &&
920 !op->o_do_not_cache &&
921 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
922 ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
924 (void)ldap_back_proxy_authz_bind( lc, op, rs, sendok );
928 #ifdef HAVE_CYRUS_SASL
929 if ( LDAP_BACK_CONN_ISPRIV( lc )
930 && li->li_acl_authmethod == LDAP_AUTH_SASL )
932 void *defaults = NULL;
934 if ( li->li_acl_secprops != NULL ) {
935 rc = ldap_set_option( lc->lc_ld,
936 LDAP_OPT_X_SASL_SECPROPS, li->li_acl_secprops);
938 if ( rc != LDAP_OPT_SUCCESS ) {
939 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
940 "(SECPROPS,\"%s\") failed!\n",
941 li->li_acl_secprops, 0, 0 );
946 defaults = lutil_sasl_defaults( lc->lc_ld,
947 li->li_acl_sasl_mech.bv_val,
948 li->li_acl_sasl_realm.bv_val,
949 li->li_acl_authcID.bv_val,
950 li->li_acl_passwd.bv_val,
953 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
954 li->li_acl_authcDN.bv_val,
955 li->li_acl_sasl_mech.bv_val, NULL, NULL,
956 LDAP_SASL_QUIET, lutil_sasl_interact,
959 lutil_sasl_freedefs( defaults );
961 rs->sr_err = slap_map_api2result( rs );
962 if ( rs->sr_err != LDAP_SUCCESS ) {
963 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
964 send_ldap_result( op, rs );
967 LDAP_BACK_CONN_ISBOUND_SET( lc );
971 #endif /* HAVE_CYRUS_SASL */
974 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
975 lc->lc_bound_ndn.bv_val,
976 LDAP_SASL_SIMPLE, &lc->lc_cred,
977 NULL, NULL, &msgid );
979 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
980 if ( retries != LDAP_BACK_RETRY_NEVER ) {
982 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
985 assert( lc->lc_refcnt > 0 );
986 if ( lc->lc_refcnt == 1 ) {
987 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
990 /* lc here must be the regular lc, reset and ready for init */
991 rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
992 if ( rs->sr_err != LDAP_SUCCESS ) {
999 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1002 if ( rs->sr_err == LDAP_SUCCESS ) {
1003 if ( retries > 0 ) {
1011 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1015 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1020 ldap_back_freeconn( op, lc, dolock );
1021 rs->sr_err = slap_map_api2result( rs );
1026 rc = ldap_back_op_result( lc, op, rs, msgid, 0, sendok );
1027 if ( rc == LDAP_SUCCESS ) {
1028 LDAP_BACK_CONN_ISBOUND_SET( lc );
1033 LDAP_BACK_CONN_BINDING_CLEAR( lc );
1034 rc = LDAP_BACK_CONN_ISBOUND( lc );
1036 ldap_back_release_conn_lock( op, rs, lc, dolock );
1043 ldap_back_dobind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1045 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
1047 return ldap_back_dobind_int( lc, op, rs, sendok, li->li_nretries, 1 );
1051 * ldap_back_default_rebind
1053 * This is a callback used for chasing referrals using the same
1054 * credentials as the original user on this session.
1057 ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
1058 ber_int_t msgid, void *params )
1060 ldapconn_t *lc = (ldapconn_t *)params;
1063 /* ... otherwise we couldn't get here */
1064 assert( lc != NULL );
1066 if ( !ldap_tls_inplace( ld ) ) {
1067 int is_tls = LDAP_BACK_CONN_ISTLS( lc ),
1069 const char *text = NULL;
1071 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
1072 LDAP_BACK_RETRY_DEFAULT, &text );
1073 if ( rc != LDAP_SUCCESS ) {
1077 #endif /* HAVE_TLS */
1079 /* FIXME: add checks on the URL/identity? */
1081 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
1082 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
1086 * ldap_back_default_urllist
1089 ldap_back_default_urllist(
1091 LDAPURLDesc **urllist,
1095 ldapinfo_t *li = (ldapinfo_t *)params;
1096 LDAPURLDesc **urltail;
1098 if ( urllist == url ) {
1099 return LDAP_SUCCESS;
1102 for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
1105 *urltail = *urllist;
1109 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
1111 ch_free( li->li_uri );
1114 ldap_get_option( ld, LDAP_OPT_URI, (void *)&li->li_uri );
1115 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
1117 return LDAP_SUCCESS;
1121 ldap_back_op_result(
1127 ldap_back_send_t sendok )
1130 LDAPMessage *res = NULL;
1133 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
1136 rs->sr_matched = NULL;
1138 /* if the error recorded in the reply corresponds
1139 * to a successful state, get the error from the
1140 * remote server response */
1141 if ( ERR_OK( rs->sr_err ) ) {
1146 tv.tv_sec = timeout;
1150 LDAP_BACK_TV_SET( &tv );
1154 /* if result parsing fails, note the failure reason */
1155 rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1159 (void)ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
1160 rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
1161 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OPERATIONS_ERROR;
1162 rs->sr_text = "Operation timed out";
1166 LDAP_BACK_TV_SET( &tv );
1167 ldap_pvt_thread_yield();
1171 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
1176 /* otherwise get the result; if it is not
1177 * LDAP_SUCCESS, record it in the reply
1178 * structure (this includes
1179 * LDAP_COMPARE_{TRUE|FALSE}) */
1181 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
1182 &match, &text, NULL, NULL, 1 );
1184 if ( rc != LDAP_SUCCESS ) {
1190 /* if the error in the reply structure is not
1191 * LDAP_SUCCESS, try to map it from client
1192 * to server error */
1193 if ( !ERR_OK( rs->sr_err ) ) {
1194 rs->sr_err = slap_map_api2result( rs );
1196 /* internal ops ( op->o_conn == NULL )
1197 * must not reply to client */
1198 if ( op->o_conn && !op->o_do_not_cache && match ) {
1200 /* record the (massaged) matched
1201 * DN into the reply structure */
1202 rs->sr_matched = match;
1206 ( ( sendok & LDAP_BACK_SENDOK )
1207 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1209 send_ldap_result( op, rs );
1212 if ( rs->sr_matched != match ) {
1213 free( (char *)rs->sr_matched );
1215 rs->sr_matched = NULL;
1216 ldap_memfree( match );
1219 ldap_memfree( text );
1222 return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1225 /* return true if bound, false if failed */
1227 ldap_back_retry( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1230 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
1232 assert( lcp != NULL );
1233 assert( *lcp != NULL );
1235 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1237 if ( (*lcp)->lc_refcnt == 1 ) {
1238 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
1239 Debug( LDAP_DEBUG_ANY,
1240 "%s ldap_back_retry: retrying URI=\"%s\" DN=\"%s\"\n",
1241 op->o_log_prefix, li->li_uri,
1242 BER_BVISNULL( &(*lcp)->lc_bound_ndn ) ?
1243 "" : (*lcp)->lc_bound_ndn.bv_val );
1244 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
1246 ldap_unbind_ext( (*lcp)->lc_ld, NULL, NULL );
1247 (*lcp)->lc_ld = NULL;
1248 LDAP_BACK_CONN_ISBOUND_CLEAR( (*lcp) );
1250 /* lc here must be the regular lc, reset and ready for init */
1251 rc = ldap_back_prepare_conn( lcp, op, rs, sendok );
1252 if ( rc != LDAP_SUCCESS ) {
1257 rc = ldap_back_dobind_int( *lcp, op, rs, sendok, 0, 0 );
1264 Debug( LDAP_DEBUG_TRACE,
1265 "ldap_back_retry: conn %p refcnt=%u unable to retry.\n",
1266 (void *)(*lcp), (*lcp)->lc_refcnt, 0 );
1268 ldap_back_release_conn_lock( op, rs, *lcp, 0 );
1272 rs->sr_err = LDAP_UNAVAILABLE;
1273 rs->sr_text = "unable to retry";
1274 send_ldap_result( op, rs );
1278 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1284 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1286 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
1287 struct berval binddn = slap_empty_bv;
1288 struct berval bindcred = slap_empty_bv;
1294 /* don't proxyAuthz if protocol is not LDAPv3 */
1295 switch ( li->li_version ) {
1300 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1309 if ( op->o_tag == LDAP_REQ_BIND ) {
1310 ndn = op->o_req_ndn;
1312 } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1313 ndn = op->o_conn->c_ndn;
1320 * FIXME: we need to let clients use proxyAuthz
1321 * otherwise we cannot do symmetric pools of servers;
1322 * we have to live with the fact that a user can
1323 * authorize itself as any ID that is allowed
1324 * by the authzTo directive of the "proxyauthzdn".
1327 * NOTE: current Proxy Authorization specification
1328 * and implementation do not allow proxy authorization
1329 * control to be provided with Bind requests
1332 * if no bind took place yet, but the connection is bound
1333 * and the "proxyauthzdn" is set, then bind as
1334 * "proxyauthzdn" and explicitly add the proxyAuthz
1335 * control to every operation with the dn bound
1336 * to the connection as control value.
1339 /* bind as proxyauthzdn only if no idassert mode
1340 * is requested, or if the client's identity
1342 switch ( li->li_idassert_mode ) {
1343 case LDAP_BACK_IDASSERT_LEGACY:
1344 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1345 if ( !BER_BVISNULL( &li->li_idassert_authcDN ) && !BER_BVISEMPTY( &li->li_idassert_authcDN ) )
1347 binddn = li->li_idassert_authcDN;
1348 bindcred = li->li_idassert_passwd;
1355 /* NOTE: rootdn can always idassert */
1356 if ( BER_BVISNULL( &ndn ) && li->li_idassert_authz == NULL ) {
1357 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1358 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1359 if ( sendok & LDAP_BACK_SENDERR ) {
1360 send_ldap_result( op, rs );
1362 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1365 rs->sr_err = LDAP_SUCCESS;
1366 binddn = slap_empty_bv;
1367 bindcred = slap_empty_bv;
1373 } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1374 struct berval authcDN;
1376 if ( BER_BVISNULL( &ndn ) ) {
1377 authcDN = slap_empty_bv;
1382 rs->sr_err = slap_sasl_matches( op, li->li_idassert_authz,
1383 &authcDN, &authcDN );
1384 if ( rs->sr_err != LDAP_SUCCESS ) {
1385 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1386 if ( sendok & LDAP_BACK_SENDERR ) {
1387 send_ldap_result( op, rs );
1389 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1392 rs->sr_err = LDAP_SUCCESS;
1393 binddn = slap_empty_bv;
1394 bindcred = slap_empty_bv;
1402 binddn = li->li_idassert_authcDN;
1403 bindcred = li->li_idassert_passwd;
1408 if ( dobind && li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1409 #ifdef HAVE_CYRUS_SASL
1410 void *defaults = NULL;
1411 struct berval authzID = BER_BVNULL;
1414 /* if SASL supports native authz, prepare for it */
1415 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1416 ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1418 switch ( li->li_idassert_mode ) {
1419 case LDAP_BACK_IDASSERT_OTHERID:
1420 case LDAP_BACK_IDASSERT_OTHERDN:
1421 authzID = li->li_idassert_authzID;
1424 case LDAP_BACK_IDASSERT_ANONYMOUS:
1425 BER_BVSTR( &authzID, "dn:" );
1428 case LDAP_BACK_IDASSERT_SELF:
1429 if ( BER_BVISNULL( &ndn ) ) {
1430 /* connection is not authc'd, so don't idassert */
1431 BER_BVSTR( &authzID, "dn:" );
1434 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1435 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1436 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1437 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1438 ndn.bv_val, ndn.bv_len + 1 );
1447 if ( li->li_idassert_secprops != NULL ) {
1448 rs->sr_err = ldap_set_option( lc->lc_ld,
1449 LDAP_OPT_X_SASL_SECPROPS,
1450 (void *)li->li_idassert_secprops );
1452 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1453 rs->sr_err = LDAP_OTHER;
1454 if ( sendok & LDAP_BACK_SENDERR ) {
1455 send_ldap_result( op, rs );
1457 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1462 defaults = lutil_sasl_defaults( lc->lc_ld,
1463 li->li_idassert_sasl_mech.bv_val,
1464 li->li_idassert_sasl_realm.bv_val,
1465 li->li_idassert_authcID.bv_val,
1466 li->li_idassert_passwd.bv_val,
1469 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
1470 li->li_idassert_sasl_mech.bv_val, NULL, NULL,
1471 LDAP_SASL_QUIET, lutil_sasl_interact,
1474 rs->sr_err = slap_map_api2result( rs );
1475 if ( rs->sr_err != LDAP_SUCCESS ) {
1476 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1477 if ( sendok & LDAP_BACK_SENDERR ) {
1478 send_ldap_result( op, rs );
1482 LDAP_BACK_CONN_ISBOUND_SET( lc );
1485 lutil_sasl_freedefs( defaults );
1487 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1491 #endif /* HAVE_CYRUS_SASL */
1494 switch ( li->li_idassert_authmethod ) {
1495 case LDAP_AUTH_NONE:
1496 LDAP_BACK_CONN_ISBOUND_SET( lc );
1499 case LDAP_AUTH_SIMPLE:
1500 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1501 binddn.bv_val, LDAP_SASL_SIMPLE,
1502 &bindcred, NULL, NULL, &msgid );
1507 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1508 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1509 if ( sendok & LDAP_BACK_SENDERR ) {
1510 send_ldap_result( op, rs );
1515 rc = ldap_back_op_result( lc, op, rs, msgid, 0, sendok );
1516 if ( rc == LDAP_SUCCESS ) {
1517 /* set rebind stuff in case of successful proxyAuthz bind,
1518 * so that referral chasing is attempted using the right
1520 LDAP_BACK_CONN_ISBOUND_SET( lc );
1521 ber_dupbv( &lc->lc_bound_ndn, &binddn );
1523 if ( LDAP_BACK_SAVECRED( li ) ) {
1524 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
1525 memset( lc->lc_cred.bv_val, 0,
1526 lc->lc_cred.bv_len );
1528 ber_bvreplace( &lc->lc_cred, &bindcred );
1529 ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
1533 return LDAP_BACK_CONN_ISBOUND( lc );
1537 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
1538 * to existing server-side controls if required; if not,
1539 * the existing server-side controls are placed in *pctrls.
1540 * The caller, after using the controls in client API
1541 * operations, if ( *pctrls != op->o_ctrls ), should
1542 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
1543 * The function returns success if the control could
1544 * be added if required, or if it did nothing; in the future,
1545 * it might return some error if it failed.
1547 * if no bind took place yet, but the connection is bound
1548 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
1549 * and explicitly add proxyAuthz the control to every operation
1550 * with the dn bound to the connection as control value.
1552 * If no server-side controls are defined for the operation,
1553 * simply add the proxyAuthz control; otherwise, if the
1554 * proxyAuthz control is not already set, add it as
1557 * FIXME: is controls order significant for security?
1558 * ANSWER: controls ordering and interoperability
1559 * must be indicated by the specs of each control; if none
1560 * is specified, the order is irrelevant.
1563 ldap_back_proxy_authz_ctrl(
1567 LDAPControl ***pctrls )
1569 ldapinfo_t *li = (ldapinfo_t *) op->o_bd->be_private;
1570 LDAPControl **ctrls = NULL;
1573 struct berval assertedID,
1578 rs->sr_err = LDAP_SUCCESS;
1580 /* don't proxyAuthz if protocol is not LDAPv3 */
1581 switch ( li->li_version ) {
1586 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1595 /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
1596 * but if it is not set this test fails. We need a different
1597 * means to detect if idassert is enabled */
1598 if ( ( BER_BVISNULL( &li->li_idassert_authcID ) || BER_BVISEMPTY( &li->li_idassert_authcID ) )
1599 && ( BER_BVISNULL( &li->li_idassert_authcDN ) || BER_BVISEMPTY( &li->li_idassert_authcDN ) ) )
1604 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
1608 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1609 ndn = op->o_conn->c_ndn;
1615 if ( li->li_idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
1616 if ( op->o_proxy_authz ) {
1618 * FIXME: we do not want to perform proxyAuthz
1619 * on behalf of the client, because this would
1620 * be performed with "proxyauthzdn" privileges.
1622 * This might actually be too strict, since
1623 * the "proxyauthzdn" authzTo, and each entry's
1624 * authzFrom attributes may be crafted
1625 * to avoid unwanted proxyAuthz to take place.
1628 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1629 rs->sr_text = "proxyAuthz not allowed within namingContext";
1634 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1638 if ( BER_BVISNULL( &ndn ) ) {
1642 if ( BER_BVISNULL( &li->li_idassert_authcDN ) ) {
1646 } else if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1647 if ( ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1648 /* && ( !BER_BVISNULL( &ndn )
1649 || LDAP_BACK_CONN_ISBOUND( lc ) ) */ )
1651 /* already asserted in SASL via native authz */
1652 /* NOTE: the test on lc->lc_bound is used to trap
1653 * native authorization of anonymous users,
1654 * since in that case ndn is NULL */
1658 } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1660 struct berval authcDN;
1662 if ( BER_BVISNULL( &ndn ) ) {
1663 authcDN = slap_empty_bv;
1667 rc = slap_sasl_matches( op, li->li_idassert_authz,
1668 &authcDN, & authcDN );
1669 if ( rc != LDAP_SUCCESS ) {
1670 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
1672 /* ndn is not authorized
1673 * to use idassert */
1680 if ( op->o_proxy_authz ) {
1683 * 1) ignore the already set proxyAuthz control
1684 * 2) leave it in place, and don't set ours
1686 * 4) reject the operation
1688 * option (4) is very drastic
1689 * option (3) will make the remote server reject
1690 * the operation, thus being equivalent to (4)
1691 * option (2) will likely break the idassert
1692 * assumptions, so we cannot accept it;
1693 * option (1) means that we are contradicting
1694 * the client's reques.
1696 * I think (4) is the only correct choice.
1698 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1699 rs->sr_text = "proxyAuthz not allowed within namingContext";
1702 if ( op->o_is_auth_check ) {
1703 mode = LDAP_BACK_IDASSERT_NOASSERT;
1706 mode = li->li_idassert_mode;
1710 case LDAP_BACK_IDASSERT_SELF:
1711 if ( BER_BVISNULL( &ndn ) ) {
1717 case LDAP_BACK_IDASSERT_LEGACY:
1718 /* original behavior:
1719 * assert the client's identity */
1720 if ( BER_BVISNULL( &ndn ) ) {
1721 assertedID = slap_empty_bv;
1727 case LDAP_BACK_IDASSERT_ANONYMOUS:
1728 /* assert "anonymous" */
1729 assertedID = slap_empty_bv;
1732 case LDAP_BACK_IDASSERT_NOASSERT:
1733 /* don't assert; bind as proxyauthzdn */
1736 case LDAP_BACK_IDASSERT_OTHERID:
1737 case LDAP_BACK_IDASSERT_OTHERDN:
1738 /* assert idassert DN */
1739 assertedID = li->li_idassert_authzID;
1746 if ( BER_BVISNULL( &assertedID ) ) {
1747 assertedID = slap_empty_bv;
1750 /* don't idassert the bound DN (ITS#4497) */
1751 if ( dn_match( &assertedID, &lc->lc_bound_ndn ) ) {
1755 if ( op->o_ctrls ) {
1756 for ( i = 0; op->o_ctrls[ i ]; i++ )
1757 /* just count ctrls */ ;
1760 ctrls = op->o_tmpalloc( sizeof( LDAPControl * ) * (i + 2) + sizeof( LDAPControl ),
1762 ctrls[ 0 ] = (LDAPControl *)&ctrls[ i + 2 ];
1764 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1765 ctrls[ 0 ]->ldctl_iscritical = 1;
1767 switch ( li->li_idassert_mode ) {
1768 /* already in u:ID or dn:DN form */
1769 case LDAP_BACK_IDASSERT_OTHERID:
1770 case LDAP_BACK_IDASSERT_OTHERDN:
1771 ber_dupbv_x( &ctrls[ 0 ]->ldctl_value, &assertedID, op->o_tmpmemctx );
1774 /* needs the dn: prefix */
1776 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1777 ctrls[ 0 ]->ldctl_value.bv_val = op->o_tmpalloc( ctrls[ 0 ]->ldctl_value.bv_len + 1,
1779 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1780 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
1781 assertedID.bv_val, assertedID.bv_len + 1 );
1785 /* Older versions of <draft-weltman-ldapv3-proxy> required
1786 * to encode the value of the authzID (and called it proxyDN);
1787 * this hack provides compatibility with those DSAs that
1788 * implement it this way */
1789 if ( li->li_idassert_flags & LDAP_BACK_AUTH_OBSOLETE_ENCODING_WORKAROUND ) {
1790 struct berval authzID = ctrls[ 0 ]->ldctl_value;
1791 BerElementBuffer berbuf;
1792 BerElement *ber = (BerElement *)&berbuf;
1795 ber_init2( ber, 0, LBER_USE_DER );
1796 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
1798 tag = ber_printf( ber, "O", &authzID );
1799 if ( tag == LBER_ERROR ) {
1800 rs->sr_err = LDAP_OTHER;
1804 if ( ber_flatten2( ber, &ctrls[ 0 ]->ldctl_value, 1 ) == -1 ) {
1805 rs->sr_err = LDAP_OTHER;
1810 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
1811 ber_free_buf( ber );
1813 if ( rs->sr_err != LDAP_SUCCESS ) {
1814 op->o_tmpfree( ctrls, op->o_tmpmemctx );
1819 } else if ( li->li_idassert_flags & LDAP_BACK_AUTH_OBSOLETE_PROXY_AUTHZ ) {
1820 struct berval authzID = ctrls[ 0 ]->ldctl_value,
1822 BerElementBuffer berbuf;
1823 BerElement *ber = (BerElement *)&berbuf;
1826 if ( strncasecmp( authzID.bv_val, "dn:", STRLENOF( "dn:" ) ) != 0 ) {
1827 op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
1828 op->o_tmpfree( ctrls, op->o_tmpmemctx );
1830 rs->sr_err = LDAP_PROTOCOL_ERROR;
1835 tmp.bv_val += STRLENOF( "dn:" );
1836 tmp.bv_len -= STRLENOF( "dn:" );
1838 ber_init2( ber, 0, LBER_USE_DER );
1839 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
1841 /* apparently, Mozilla API encodes this
1842 * as "SEQUENCE { LDAPDN }" */
1843 tag = ber_printf( ber, "{O}", &tmp );
1844 if ( tag == LBER_ERROR ) {
1845 rs->sr_err = LDAP_OTHER;
1849 if ( ber_flatten2( ber, &ctrls[ 0 ]->ldctl_value, 1 ) == -1 ) {
1850 rs->sr_err = LDAP_OTHER;
1855 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
1856 ber_free_buf( ber );
1858 if ( rs->sr_err != LDAP_SUCCESS ) {
1859 op->o_tmpfree( ctrls, op->o_tmpmemctx );
1864 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ;
1867 if ( op->o_ctrls ) {
1868 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1869 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1872 ctrls[ i + 1 ] = NULL;
1875 if ( ctrls == NULL ) {
1876 ctrls = op->o_ctrls;
1885 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1887 LDAPControl **ctrls = *pctrls;
1889 /* we assume that the first control is the proxyAuthz
1890 * added by back-ldap, so it's the only one we explicitly
1892 if ( ctrls && ctrls != op->o_ctrls ) {
1893 assert( ctrls[ 0 ] != NULL );
1895 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1896 op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
1899 op->o_tmpfree( ctrls, op->o_tmpmemctx );