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 );
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 );
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;
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 ) {
496 /* Searches for a ldapconn in the avl tree */
498 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
500 lc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
501 (caddr_t)&lc_curr, ldap_back_conn_cmp );
503 refcnt = ++lc->lc_refcnt;
504 /* Don't reuse connections while they're still binding */
505 if ( LDAP_BACK_CONN_BINDING( lc )) {
506 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
507 ldap_pvt_thread_yield();
511 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
514 /* Looks like we didn't get a bind. Open a new session... */
516 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
519 if ( sendok & LDAP_BACK_BINDING )
520 LDAP_BACK_CONN_BINDING_SET( lc );
522 lc->lc_conn = lc_curr.lc_conn;
523 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
525 if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) {
526 ber_dupbv( &lc->lc_cred, &li->li_acl_passwd );
527 ber_dupbv( &lc->lc_bound_ndn, &li->li_acl_authcDN );
528 LDAP_BACK_CONN_ISPRIV_SET( lc );
531 BER_BVZERO( &lc->lc_cred );
532 BER_BVZERO( &lc->lc_bound_ndn );
534 /* FIXME: if we set lc_bound_ndn = o_ndn
535 * we end up with a bind with DN but no password! */
536 if ( !BER_BVISEMPTY( &op->o_ndn )
537 && SLAP_IS_AUTHZ_BACKEND( op ) )
539 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
545 /* if start TLS failed but it was not mandatory,
546 * check if the non-TLS connection was already
547 * in cache; in case, destroy the newly created
548 * connection and use the existing one */
549 if ( lc->lc_conn == LDAP_BACK_PCONN_TLS
550 && !ldap_tls_inplace( lc->lc_ld ) )
554 lc_curr.lc_conn = LDAP_BACK_PCONN;
555 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
556 tmplc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
557 (caddr_t)&lc_curr, ldap_back_conn_cmp );
558 if ( tmplc != NULL ) {
559 refcnt = ++tmplc->lc_refcnt;
560 ldap_back_conn_free( lc );
563 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
565 if ( tmplc != NULL ) {
569 #endif /* HAVE_TLS */
571 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
573 /* Inserts the newly created ldapconn in the avl tree */
574 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
576 assert( lc->lc_refcnt == 1 );
577 rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
578 ldap_back_conn_cmp, ldap_back_conn_dup );
580 #if PRINT_CONNTREE > 0
581 myprint( li->li_conninfo.lai_tree );
582 #endif /* PRINT_CONNTREE */
584 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
586 Debug( LDAP_DEBUG_TRACE,
587 "=>ldap_back_getconn: conn %p inserted (refcnt=%u)\n",
588 (void *)lc, refcnt, 0 );
590 /* Err could be -1 in case a duplicate ldapconn is inserted */
591 if ( rs->sr_err != 0 ) {
592 ldap_back_conn_free( lc );
593 rs->sr_err = LDAP_OTHER;
594 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
595 send_ldap_error( op, rs, LDAP_OTHER,
596 "internal server error" );
602 if ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout ) {
603 /* in case of failure, it frees/taints lc and sets it to NULL */
604 if ( ldap_back_retry( &lc, op, rs, sendok ) ) {
610 Debug( LDAP_DEBUG_TRACE,
611 "=>ldap_back_getconn: conn %p fetched (refcnt=%u)\n",
612 (void *)lc, refcnt, 0 );
616 if ( li->li_idle_timeout && lc ) {
617 lc->lc_time = op->o_time;
625 ldap_back_release_conn(
630 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
632 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
633 assert( lc->lc_refcnt > 0 );
635 LDAP_BACK_CONN_BINDING_CLEAR( lc );
636 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
642 * Note: as the check for the value of lc->lc_bound was already here, I removed
643 * it from all the callers, and I made the function return the flag, so
644 * it can be used to simplify the check.
646 * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
649 ldap_back_dobind_int(
653 ldap_back_send_t sendok,
657 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
659 int rc = LDAP_BACK_CONN_ISBOUND( lc );
662 assert( retries >= 0 );
668 while ( lc->lc_refcnt > 1 ) {
669 ldap_pvt_thread_yield();
670 if (( rc = LDAP_BACK_CONN_ISBOUND( lc )))
675 * FIXME: we need to let clients use proxyAuthz
676 * otherwise we cannot do symmetric pools of servers;
677 * we have to live with the fact that a user can
678 * authorize itself as any ID that is allowed
679 * by the authzTo directive of the "proxyauthzdn".
682 * NOTE: current Proxy Authorization specification
683 * and implementation do not allow proxy authorization
684 * control to be provided with Bind requests
687 * if no bind took place yet, but the connection is bound
688 * and the "idassert-authcDN" (or other ID) is set,
689 * then bind as the asserting identity and explicitly
690 * add the proxyAuthz control to every operation with the
691 * dn bound to the connection as control value.
692 * This is done also if this is the authrizing backend,
693 * but the "override" flag is given to idassert.
694 * It allows to use SASL bind and yet proxyAuthz users
696 if ( op->o_conn != NULL &&
697 !op->o_do_not_cache &&
698 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
699 ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
701 (void)ldap_back_proxy_authz_bind( lc, op, rs );
705 #ifdef HAVE_CYRUS_SASL
706 if ( LDAP_BACK_CONN_ISPRIV( lc )
707 && li->li_acl_authmethod == LDAP_AUTH_SASL )
709 void *defaults = NULL;
711 if ( li->li_acl_secprops != NULL ) {
712 rc = ldap_set_option( lc->lc_ld,
713 LDAP_OPT_X_SASL_SECPROPS, li->li_acl_secprops);
715 if ( rc != LDAP_OPT_SUCCESS ) {
716 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
717 "(%s,SECPROPS,\"%s\") failed!\n",
718 li->li_uri, li->li_acl_secprops, 0 );
723 defaults = lutil_sasl_defaults( lc->lc_ld,
724 li->li_acl_sasl_mech.bv_val,
725 li->li_acl_sasl_realm.bv_val,
726 li->li_acl_authcID.bv_val,
727 li->li_acl_passwd.bv_val,
730 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
731 li->li_acl_authcDN.bv_val,
732 li->li_acl_sasl_mech.bv_val, NULL, NULL,
733 LDAP_SASL_QUIET, lutil_sasl_interact,
736 lutil_sasl_freedefs( defaults );
738 rs->sr_err = slap_map_api2result( rs );
739 if ( rs->sr_err != LDAP_SUCCESS ) {
740 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
741 send_ldap_result( op, rs );
744 LDAP_BACK_CONN_ISBOUND_SET( lc );
748 #endif /* HAVE_CYRUS_SASL */
751 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
752 lc->lc_bound_ndn.bv_val,
753 LDAP_SASL_SIMPLE, &lc->lc_cred,
754 NULL, NULL, &msgid );
756 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
757 if ( retries != LDAP_BACK_RETRY_NEVER ) {
759 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
762 assert( lc->lc_refcnt > 0 );
763 if ( lc->lc_refcnt == 1 ) {
764 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
767 /* lc here must be the regular lc, reset and ready for init */
768 rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
771 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
773 if ( rs->sr_err == LDAP_SUCCESS ) {
781 ldap_back_freeconn( op, lc, dolock );
782 rs->sr_err = slap_map_api2result( rs );
787 rc = ldap_back_op_result( lc, op, rs, msgid, 0, sendok );
788 if ( rc == LDAP_SUCCESS ) {
789 LDAP_BACK_CONN_ISBOUND_SET( lc );
792 ldap_back_release_conn( op, rs, lc );
796 rc = LDAP_BACK_CONN_ISBOUND( lc );
802 ldap_back_dobind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
804 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
806 return ldap_back_dobind_int( lc, op, rs, sendok, li->li_nretries, 1 );
810 * ldap_back_default_rebind
812 * This is a callback used for chasing referrals using the same
813 * credentials as the original user on this session.
816 ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
817 ber_int_t msgid, void *params )
819 ldapconn_t *lc = (ldapconn_t *)params;
822 /* ... otherwise we couldn't get here */
823 assert( lc != NULL );
825 if ( !ldap_tls_inplace( ld ) ) {
826 int is_tls = LDAP_BACK_CONN_ISTLS( lc ),
828 const char *text = NULL;
830 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
831 LDAP_BACK_RETRY_DEFAULT, &text );
832 if ( rc != LDAP_SUCCESS ) {
836 #endif /* HAVE_TLS */
838 /* FIXME: add checks on the URL/identity? */
840 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
841 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
851 ldap_back_send_t sendok )
854 LDAPMessage *res = NULL;
857 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
860 rs->sr_matched = NULL;
862 /* if the error recorded in the reply corresponds
863 * to a successful state, get the error from the
864 * remote server response */
865 if ( ERR_OK( rs->sr_err ) ) {
874 LDAP_BACK_TV_SET( &tv );
878 /* if result parsing fails, note the failure reason */
879 rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
883 (void)ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
884 rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
885 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OPERATIONS_ERROR;
886 rs->sr_text = "Operation timed out";
890 LDAP_BACK_TV_SET( &tv );
891 ldap_pvt_thread_yield();
895 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
900 /* otherwise get the result; if it is not
901 * LDAP_SUCCESS, record it in the reply
902 * structure (this includes
903 * LDAP_COMPARE_{TRUE|FALSE}) */
905 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
906 &match, &text, NULL, NULL, 1 );
907 #ifndef LDAP_NULL_IS_NULL
908 if ( match != NULL && match[ 0 ] == '\0' ) {
909 ldap_memfree( match );
912 if ( text != NULL && text[ 0 ] == '\0' ) {
913 ldap_memfree( text );
916 #endif /* LDAP_NULL_IS_NULL */
918 if ( rc != LDAP_SUCCESS ) {
924 /* if the error in the reply structure is not
925 * LDAP_SUCCESS, try to map it from client
927 if ( !ERR_OK( rs->sr_err ) ) {
928 rs->sr_err = slap_map_api2result( rs );
930 /* internal ops ( op->o_conn == NULL )
931 * must not reply to client */
932 if ( op->o_conn && !op->o_do_not_cache && match ) {
934 /* record the (massaged) matched
935 * DN into the reply structure */
936 rs->sr_matched = match;
940 ( ( sendok & LDAP_BACK_SENDOK )
941 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
943 send_ldap_result( op, rs );
946 if ( rs->sr_matched != match ) {
947 free( (char *)rs->sr_matched );
949 rs->sr_matched = NULL;
950 ldap_memfree( match );
953 ldap_memfree( text );
956 return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
959 /* return true if bound, false if failed */
961 ldap_back_retry( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
964 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
966 assert( lcp != NULL );
967 assert( *lcp != NULL );
969 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
971 if ( (*lcp)->lc_refcnt == 1 ) {
972 Debug( LDAP_DEBUG_ANY,
973 "%s ldap_back_retry: retrying URI=\"%s\" DN=\"%s\"\n",
974 op->o_log_prefix, li->li_uri,
975 BER_BVISNULL( &(*lcp)->lc_bound_ndn ) ?
976 "" : (*lcp)->lc_bound_ndn.bv_val );
978 ldap_unbind_ext( (*lcp)->lc_ld, NULL, NULL );
979 (*lcp)->lc_ld = NULL;
980 LDAP_BACK_CONN_ISBOUND_CLEAR( (*lcp) );
982 /* lc here must be the regular lc, reset and ready for init */
983 rc = ldap_back_prepare_conn( lcp, op, rs, sendok );
984 if ( rc != LDAP_SUCCESS ) {
989 rc = ldap_back_dobind_int( *lcp, op, rs, sendok, 0, 0 );
996 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1002 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs )
1004 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private;
1005 struct berval binddn = slap_empty_bv;
1006 struct berval bindcred = slap_empty_bv;
1012 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1013 ndn = op->o_conn->c_ndn;
1020 * FIXME: we need to let clients use proxyAuthz
1021 * otherwise we cannot do symmetric pools of servers;
1022 * we have to live with the fact that a user can
1023 * authorize itself as any ID that is allowed
1024 * by the authzTo directive of the "proxyauthzdn".
1027 * NOTE: current Proxy Authorization specification
1028 * and implementation do not allow proxy authorization
1029 * control to be provided with Bind requests
1032 * if no bind took place yet, but the connection is bound
1033 * and the "proxyauthzdn" is set, then bind as
1034 * "proxyauthzdn" and explicitly add the proxyAuthz
1035 * control to every operation with the dn bound
1036 * to the connection as control value.
1039 /* bind as proxyauthzdn only if no idassert mode
1040 * is requested, or if the client's identity
1042 switch ( li->li_idassert_mode ) {
1043 case LDAP_BACK_IDASSERT_LEGACY:
1044 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1045 if ( !BER_BVISNULL( &li->li_idassert_authcDN ) && !BER_BVISEMPTY( &li->li_idassert_authcDN ) )
1047 binddn = li->li_idassert_authcDN;
1048 bindcred = li->li_idassert_passwd;
1055 /* NOTE: rootdn can always idassert */
1056 if ( BER_BVISNULL( &ndn ) && li->li_idassert_authz == NULL ) {
1057 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1058 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1059 send_ldap_result( op, rs );
1060 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1063 rs->sr_err = LDAP_SUCCESS;
1064 binddn = slap_empty_bv;
1065 bindcred = slap_empty_bv;
1071 } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1072 struct berval authcDN;
1074 if ( BER_BVISNULL( &ndn ) ) {
1075 authcDN = slap_empty_bv;
1080 rs->sr_err = slap_sasl_matches( op, li->li_idassert_authz,
1081 &authcDN, &authcDN );
1082 if ( rs->sr_err != LDAP_SUCCESS ) {
1083 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1084 send_ldap_result( op, rs );
1085 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1088 rs->sr_err = LDAP_SUCCESS;
1089 binddn = slap_empty_bv;
1090 bindcred = slap_empty_bv;
1098 binddn = li->li_idassert_authcDN;
1099 bindcred = li->li_idassert_passwd;
1104 if ( dobind && li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1105 #ifdef HAVE_CYRUS_SASL
1106 void *defaults = NULL;
1107 struct berval authzID = BER_BVNULL;
1110 /* if SASL supports native authz, prepare for it */
1111 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1112 ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1114 switch ( li->li_idassert_mode ) {
1115 case LDAP_BACK_IDASSERT_OTHERID:
1116 case LDAP_BACK_IDASSERT_OTHERDN:
1117 authzID = li->li_idassert_authzID;
1120 case LDAP_BACK_IDASSERT_ANONYMOUS:
1121 BER_BVSTR( &authzID, "dn:" );
1124 case LDAP_BACK_IDASSERT_SELF:
1125 if ( BER_BVISNULL( &ndn ) ) {
1126 /* connection is not authc'd, so don't idassert */
1127 BER_BVSTR( &authzID, "dn:" );
1130 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1131 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1132 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1133 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1134 ndn.bv_val, ndn.bv_len + 1 );
1143 if ( li->li_idassert_secprops != NULL ) {
1144 rs->sr_err = ldap_set_option( lc->lc_ld,
1145 LDAP_OPT_X_SASL_SECPROPS,
1146 (void *)li->li_idassert_secprops );
1148 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1149 send_ldap_result( op, rs );
1150 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1155 defaults = lutil_sasl_defaults( lc->lc_ld,
1156 li->li_idassert_sasl_mech.bv_val,
1157 li->li_idassert_sasl_realm.bv_val,
1158 li->li_idassert_authcID.bv_val,
1159 li->li_idassert_passwd.bv_val,
1162 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
1163 li->li_idassert_sasl_mech.bv_val, NULL, NULL,
1164 LDAP_SASL_QUIET, lutil_sasl_interact,
1167 rs->sr_err = slap_map_api2result( rs );
1168 if ( rs->sr_err != LDAP_SUCCESS ) {
1169 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1170 send_ldap_result( op, rs );
1173 LDAP_BACK_CONN_ISBOUND_SET( lc );
1176 lutil_sasl_freedefs( defaults );
1178 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1182 #endif /* HAVE_CYRUS_SASL */
1185 switch ( li->li_idassert_authmethod ) {
1186 case LDAP_AUTH_NONE:
1187 LDAP_BACK_CONN_ISBOUND_SET( lc );
1190 case LDAP_AUTH_SIMPLE:
1191 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1192 binddn.bv_val, LDAP_SASL_SIMPLE,
1193 &bindcred, NULL, NULL, &msgid );
1198 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1199 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1200 send_ldap_result( op, rs );
1204 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_SENDERR );
1205 if ( rc == LDAP_SUCCESS ) {
1206 LDAP_BACK_CONN_ISBOUND_SET( lc );
1209 return LDAP_BACK_CONN_ISBOUND( lc );
1213 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
1214 * to existing server-side controls if required; if not,
1215 * the existing server-side controls are placed in *pctrls.
1216 * The caller, after using the controls in client API
1217 * operations, if ( *pctrls != op->o_ctrls ), should
1218 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
1219 * The function returns success if the control could
1220 * be added if required, or if it did nothing; in the future,
1221 * it might return some error if it failed.
1223 * if no bind took place yet, but the connection is bound
1224 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
1225 * and explicitly add proxyAuthz the control to every operation
1226 * with the dn bound to the connection as control value.
1228 * If no server-side controls are defined for the operation,
1229 * simply add the proxyAuthz control; otherwise, if the
1230 * proxyAuthz control is not already set, add it as
1233 * FIXME: is controls order significant for security?
1234 * ANSWER: controls ordering and interoperability
1235 * must be indicated by the specs of each control; if none
1236 * is specified, the order is irrelevant.
1239 ldap_back_proxy_authz_ctrl(
1243 LDAPControl ***pctrls )
1245 ldapinfo_t *li = (ldapinfo_t *) op->o_bd->be_private;
1246 LDAPControl **ctrls = NULL;
1249 struct berval assertedID,
1254 rs->sr_err = LDAP_SUCCESS;
1256 /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
1257 * but if it is not set this test fails. We need a different
1258 * means to detect if idassert is enabled */
1259 if ( ( BER_BVISNULL( &li->li_idassert_authcID ) || BER_BVISEMPTY( &li->li_idassert_authcID ) )
1260 && ( BER_BVISNULL( &li->li_idassert_authcDN ) || BER_BVISEMPTY( &li->li_idassert_authcDN ) ) )
1265 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
1269 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1270 ndn = op->o_conn->c_ndn;
1276 if ( li->li_idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
1277 if ( op->o_proxy_authz ) {
1279 * FIXME: we do not want to perform proxyAuthz
1280 * on behalf of the client, because this would
1281 * be performed with "proxyauthzdn" privileges.
1283 * This might actually be too strict, since
1284 * the "proxyauthzdn" authzTo, and each entry's
1285 * authzFrom attributes may be crafted
1286 * to avoid unwanted proxyAuthz to take place.
1289 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1290 rs->sr_text = "proxyAuthz not allowed within namingContext";
1295 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1299 if ( BER_BVISNULL( &ndn ) ) {
1303 if ( BER_BVISNULL( &li->li_idassert_authcDN ) ) {
1307 } else if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1308 if ( ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1309 /* && ( !BER_BVISNULL( &ndn )
1310 || LDAP_BACK_CONN_ISBOUND( lc ) ) */ )
1312 /* already asserted in SASL via native authz */
1313 /* NOTE: the test on lc->lc_bound is used to trap
1314 * native authorization of anonymous users,
1315 * since in that case ndn is NULL */
1319 } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1321 struct berval authcDN;
1323 if ( BER_BVISNULL( &ndn ) ) {
1324 authcDN = slap_empty_bv;
1328 rc = slap_sasl_matches( op, li->li_idassert_authz,
1329 &authcDN, & authcDN );
1330 if ( rc != LDAP_SUCCESS ) {
1331 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
1333 /* ndn is not authorized
1334 * to use idassert */
1341 if ( op->o_proxy_authz ) {
1344 * 1) ignore the already set proxyAuthz control
1345 * 2) leave it in place, and don't set ours
1347 * 4) reject the operation
1349 * option (4) is very drastic
1350 * option (3) will make the remote server reject
1351 * the operation, thus being equivalent to (4)
1352 * option (2) will likely break the idassert
1353 * assumptions, so we cannot accept it;
1354 * option (1) means that we are contradicting
1355 * the client's reques.
1357 * I think (4) is the only correct choice.
1359 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1360 rs->sr_text = "proxyAuthz not allowed within namingContext";
1363 if ( op->o_is_auth_check ) {
1364 mode = LDAP_BACK_IDASSERT_NOASSERT;
1367 mode = li->li_idassert_mode;
1371 case LDAP_BACK_IDASSERT_LEGACY:
1372 case LDAP_BACK_IDASSERT_SELF:
1373 /* original behavior:
1374 * assert the client's identity */
1375 if ( BER_BVISNULL( &ndn ) ) {
1376 assertedID = slap_empty_bv;
1382 case LDAP_BACK_IDASSERT_ANONYMOUS:
1383 /* assert "anonymous" */
1384 assertedID = slap_empty_bv;
1387 case LDAP_BACK_IDASSERT_NOASSERT:
1388 /* don't assert; bind as proxyauthzdn */
1391 case LDAP_BACK_IDASSERT_OTHERID:
1392 case LDAP_BACK_IDASSERT_OTHERDN:
1393 /* assert idassert DN */
1394 assertedID = li->li_idassert_authzID;
1401 if ( BER_BVISNULL( &assertedID ) ) {
1402 assertedID = slap_empty_bv;
1405 if ( op->o_ctrls ) {
1406 for ( i = 0; op->o_ctrls[ i ]; i++ )
1407 /* just count ctrls */ ;
1410 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1411 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1413 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1414 ctrls[ 0 ]->ldctl_iscritical = 1;
1416 switch ( li->li_idassert_mode ) {
1417 /* already in u:ID or dn:DN form */
1418 case LDAP_BACK_IDASSERT_OTHERID:
1419 case LDAP_BACK_IDASSERT_OTHERDN:
1420 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1423 /* needs the dn: prefix */
1425 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1426 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1427 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1428 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
1429 assertedID.bv_val, assertedID.bv_len + 1 );
1433 if ( op->o_ctrls ) {
1434 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1435 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1438 ctrls[ i + 1 ] = NULL;
1441 if ( ctrls == NULL ) {
1442 ctrls = op->o_ctrls;
1451 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1453 LDAPControl **ctrls = *pctrls;
1455 /* we assume that the first control is the proxyAuthz
1456 * added by back-ldap, so it's the only one we explicitly
1458 if ( ctrls && ctrls != op->o_ctrls ) {
1459 assert( ctrls[ 0 ] != NULL );
1461 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1462 free( ctrls[ 0 ]->ldctl_value.bv_val );