1 /* bind.c - ldap backend bind function */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 1999-2005 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( struct ldapconn *lc, Operation *op, SlapReply *rs );
48 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
51 ldap_back_bind( Operation *op, SlapReply *rs )
53 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
59 lc = ldap_back_getconn( op, rs, LDAP_BACK_SENDERR );
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, 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->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->conn_mutex );
113 if ( lc->lc_refcnt > 1 ) {
114 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
115 ldap_pvt_thread_yield();
119 assert( lc->lc_refcnt == 1 );
120 lc = avl_delete( &li->conntree, (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->conntree, (caddr_t)lc,
126 ldap_back_conn_cmp, ldap_back_conn_dup );
127 ldap_pvt_thread_mutex_unlock( &li->conn_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 struct ldapconn based on the value of the conn pointer;
149 ldap_back_conn_cmp( const void *c1, const void *c2 )
151 const struct ldapconn *lc1 = (const struct ldapconn *)c1;
152 const struct ldapconn *lc2 = (const struct ldapconn *)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 struct ldapconn has been inserted;
174 ldap_back_conn_dup( void *c1, void *c2 )
176 struct ldapconn *lc1 = (struct ldapconn *)c1;
177 struct ldapconn *lc2 = (struct ldapconn *)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, struct ldapconn *lc )
232 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
234 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
236 assert( lc->lc_refcnt > 0 );
237 if ( --lc->lc_refcnt == 0 ) {
238 lc = avl_delete( &li->conntree, (caddr_t)lc,
239 ldap_back_conn_cmp );
240 assert( lc != NULL );
242 ldap_back_conn_free( (void *)lc );
245 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
261 int rc = LDAP_SUCCESS;
262 struct ldapinfo dummy;
264 /* this is ridiculous... */
267 /* start TLS ("tls-[try-]{start,propagate}" statements) */
268 if ( ( LDAP_BACK_USE_TLS( &dummy ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS( &dummy ) ) )
269 && !ldap_is_ldaps_url( url ) )
271 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
273 * use asynchronous StartTLS
274 * in case, chase referral (not implemented yet)
278 if ( protocol == 0 ) {
279 ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION,
283 if ( protocol < LDAP_VERSION3 ) {
284 protocol = LDAP_VERSION3;
285 /* Set LDAP version */
286 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION,
287 (const void *)&protocol );
290 rc = ldap_start_tls( ld, NULL, NULL, &msgid );
291 if ( rc == LDAP_SUCCESS ) {
292 LDAPMessage *res = NULL;
295 LDAP_BACK_TV_SET( &tv );
298 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
302 } else if ( rc == 0 ) {
303 if ( retries != LDAP_BACK_RETRY_NEVER ) {
304 ldap_pvt_thread_yield();
308 LDAP_BACK_TV_SET( &tv );
313 } else if ( rc == LDAP_RES_EXTENDED ) {
314 struct berval *data = NULL;
316 rc = ldap_parse_extended_result( ld, res,
318 if ( rc == LDAP_SUCCESS ) {
319 rc = ldap_result2error( ld, res, 1 );
322 /* FIXME: in case a referral
323 * is returned, should we try
324 * using it instead of the
326 if ( rc == LDAP_SUCCESS ) {
327 rc = ldap_install_tls( ld );
329 } else if ( rc == LDAP_REFERRAL ) {
331 *text = "unwilling to chase referral returned by Start TLS exop";
335 if ( data->bv_val ) {
336 ber_memfree( data->bv_val );
350 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
352 * use synchronous StartTLS
354 rc = ldap_start_tls_s( ld, NULL, NULL );
355 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
357 /* if StartTLS is requested, only attempt it if the URL
358 * is not "ldaps://"; this may occur not only in case
359 * of misconfiguration, but also when used in the chain
360 * overlay, where the "uri" can be parsed out of a referral */
366 case LDAP_SERVER_DOWN:
370 if ( LDAP_BACK_TLS_CRITICAL( &dummy ) ) {
371 *text = "could not start TLS";
375 /* in case Start TLS is not critical */
387 #endif /* HAVE_TLS */
390 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
392 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
393 int vers = op->o_protocol;
396 int is_tls = op->o_conn->c_is_tls;
397 #endif /* HAVE_TLS */
399 assert( lcp != NULL );
401 rs->sr_err = ldap_initialize( &ld, li->url );
402 if ( rs->sr_err != LDAP_SUCCESS ) {
406 /* Set LDAP version. This will always succeed: If the client
407 * bound with a particular version, then so can we.
409 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&vers );
411 /* automatically chase referrals ("[dont-]chase-referrals" statement) */
412 if ( LDAP_BACK_CHASE_REFERRALS( li ) ) {
413 ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
417 rs->sr_err = ldap_back_start_tls( ld, op->o_protocol, &is_tls,
418 li->url, li->flags, li->nretries, &rs->sr_text );
419 if ( rs->sr_err != LDAP_SUCCESS ) {
420 ldap_unbind_ext( ld, NULL, NULL );
423 #endif /* HAVE_TLS */
425 if ( *lcp == NULL ) {
426 *lcp = (struct ldapconn *)ch_calloc( 1, sizeof( struct ldapconn ) );
427 (*lcp)->lc_flags= li->flags;
430 (*lcp)->lc_refcnt = 1;
433 LDAP_BACK_CONN_ISTLS_SET( *lcp );
435 LDAP_BACK_CONN_ISTLS_CLEAR( *lcp );
437 #endif /* HAVE_TLS */
440 if ( rs->sr_err != LDAP_SUCCESS ) {
441 rs->sr_err = slap_map_api2result( rs );
442 if ( sendok & LDAP_BACK_SENDERR ) {
443 if ( rs->sr_text == NULL ) {
444 rs->sr_text = "ldap_initialize() failed";
446 send_ldap_result( op, rs );
455 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
457 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
462 /* Internal searches are privileged and shared. So is root. */
463 if ( op->o_do_not_cache || be_isroot( op ) ) {
464 LDAP_BACK_CONN_ISPRIV_SET( &lc_curr );
465 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
466 lc_curr.lc_conn = LDAP_BACK_PCONN_SET( op );
469 lc_curr.lc_local_ndn = op->o_ndn;
470 /* Explicit binds must not be shared */
471 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
472 lc_curr.lc_conn = op->o_conn;
475 lc_curr.lc_conn = LDAP_BACK_PCONN_SET( op );
479 /* Searches for a ldapconn in the avl tree */
480 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
482 lc = (struct ldapconn *)avl_find( li->conntree,
483 (caddr_t)&lc_curr, ldap_back_conn_cmp );
485 refcnt = ++lc->lc_refcnt;
487 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
489 /* Looks like we didn't get a bind. Open a new session... */
491 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
495 lc->lc_conn = lc_curr.lc_conn;
496 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
498 if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) {
499 ber_dupbv( &lc->lc_cred, &li->acl_passwd );
500 ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
501 LDAP_BACK_CONN_ISPRIV_SET( lc );
504 BER_BVZERO( &lc->lc_cred );
505 BER_BVZERO( &lc->lc_bound_ndn );
506 if ( !BER_BVISEMPTY( &op->o_ndn )
507 && SLAP_IS_AUTHZ_BACKEND( op ) )
509 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
514 /* if start TLS failed but it was not mandatory,
515 * check if the non-TLS connection was already
516 * in cache; in case, destroy the newly created
517 * connection and use the existing one */
518 if ( lc->lc_conn == LDAP_BACK_PCONN_TLS
519 && !ldap_tls_inplace( lc->lc_ld ) )
521 struct ldapconn *tmplc;
523 lc_curr.lc_conn = LDAP_BACK_PCONN;
524 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
525 tmplc = (struct ldapconn *)avl_find( li->conntree,
526 (caddr_t)&lc_curr, ldap_back_conn_cmp );
527 if ( tmplc != NULL ) {
528 refcnt = ++tmplc->lc_refcnt;
529 ldap_back_conn_free( lc );
532 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
534 if ( tmplc != NULL ) {
538 #endif /* HAVE_TLS */
540 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
542 /* Inserts the newly created ldapconn in the avl tree */
543 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
545 assert( lc->lc_refcnt == 1 );
546 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
547 ldap_back_conn_cmp, ldap_back_conn_dup );
549 #if PRINT_CONNTREE > 0
550 myprint( li->conntree );
551 #endif /* PRINT_CONNTREE */
553 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
555 Debug( LDAP_DEBUG_TRACE,
556 "=>ldap_back_getconn: conn %p inserted (refcnt=%u)\n",
557 (void *)lc, refcnt, 0 );
559 /* Err could be -1 in case a duplicate ldapconn is inserted */
560 if ( rs->sr_err != 0 ) {
561 ldap_back_conn_free( lc );
562 rs->sr_err = LDAP_OTHER;
563 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
564 send_ldap_error( op, rs, LDAP_OTHER,
565 "internal server error" );
571 Debug( LDAP_DEBUG_TRACE,
572 "=>ldap_back_getconn: conn %p fetched (refcnt=%u)\n",
573 (void *)lc, refcnt, 0 );
581 ldap_back_release_conn(
584 struct ldapconn *lc )
586 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
588 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
589 assert( lc->lc_refcnt > 0 );
591 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
597 * Note: as the check for the value of lc->lc_bound was already here, I removed
598 * it from all the callers, and I made the function return the flag, so
599 * it can be used to simplify the check.
601 * Note: dolock indicates whether li->conn_mutex must be locked or not
604 ldap_back_dobind_int(
608 ldap_back_send_t sendok,
612 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
614 int rc = LDAP_BACK_CONN_ISBOUND( lc );
617 assert( retries >= 0 );
624 * FIXME: we need to let clients use proxyAuthz
625 * otherwise we cannot do symmetric pools of servers;
626 * we have to live with the fact that a user can
627 * authorize itself as any ID that is allowed
628 * by the authzTo directive of the "proxyauthzdn".
631 * NOTE: current Proxy Authorization specification
632 * and implementation do not allow proxy authorization
633 * control to be provided with Bind requests
636 * if no bind took place yet, but the connection is bound
637 * and the "idassert-authcDN" (or other ID) is set,
638 * then bind as the asserting identity and explicitly
639 * add the proxyAuthz control to every operation with the
640 * dn bound to the connection as control value.
641 * This is done also if this is the authrizing backend,
642 * but the "override" flag is given to idassert.
643 * It allows to use SASL bind and yet proxyAuthz users
645 if ( op->o_conn != NULL &&
646 !op->o_do_not_cache &&
647 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
648 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
650 (void)ldap_back_proxy_authz_bind( lc, op, rs );
654 #ifdef HAVE_CYRUS_SASL
655 if ( LDAP_BACK_CONN_ISPRIV( lc )
656 && li->acl_authmethod == LDAP_AUTH_SASL )
658 void *defaults = NULL;
660 if ( li->acl_secprops != NULL ) {
661 rc = ldap_set_option( lc->lc_ld,
662 LDAP_OPT_X_SASL_SECPROPS, li->acl_secprops);
664 if ( rc != LDAP_OPT_SUCCESS ) {
665 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
666 "(%s,SECPROPS,\"%s\") failed!\n",
667 li->url, li->acl_secprops, 0 );
672 defaults = lutil_sasl_defaults( lc->lc_ld,
673 li->acl_sasl_mech.bv_val,
674 li->acl_sasl_realm.bv_val,
675 li->acl_authcID.bv_val,
676 li->acl_passwd.bv_val,
679 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
680 li->acl_authcDN.bv_val,
681 li->acl_sasl_mech.bv_val, NULL, NULL,
682 LDAP_SASL_QUIET, lutil_sasl_interact,
685 lutil_sasl_freedefs( defaults );
687 rs->sr_err = slap_map_api2result( rs );
688 if ( rs->sr_err != LDAP_SUCCESS ) {
689 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
690 send_ldap_result( op, rs );
693 LDAP_BACK_CONN_ISBOUND_SET( lc );
697 #endif /* HAVE_CYRUS_SASL */
700 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
701 lc->lc_bound_ndn.bv_val,
702 LDAP_SASL_SIMPLE, &lc->lc_cred,
703 NULL, NULL, &msgid );
705 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
706 if ( retries != LDAP_BACK_RETRY_NEVER ) {
708 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
711 assert( lc->lc_refcnt > 0 );
712 if ( lc->lc_refcnt == 1 ) {
713 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
716 /* lc here must be the regular lc, reset and ready for init */
717 rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
720 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
722 if ( rs->sr_err == LDAP_SUCCESS ) {
730 ldap_back_freeconn( op, lc );
731 rs->sr_err = slap_map_api2result( rs );
736 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
737 if ( rc == LDAP_SUCCESS ) {
738 LDAP_BACK_CONN_ISBOUND_SET( lc );
741 ldap_back_release_conn( op, rs, lc );
745 rc = LDAP_BACK_CONN_ISBOUND( lc );
751 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
753 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
755 return ldap_back_dobind_int( lc, op, rs, sendok, li->nretries, 1 );
759 * ldap_back_default_rebind
761 * This is a callback used for chasing referrals using the same
762 * credentials as the original user on this session.
765 ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
766 ber_int_t msgid, void *params )
768 struct ldapconn *lc = (struct ldapconn *)params;
771 /* ... otherwise we couldn't get here */
772 assert( lc != NULL );
774 if ( !ldap_tls_inplace( ld ) ) {
775 int is_tls = LDAP_BACK_CONN_ISTLS( lc ),
777 const char *text = NULL;
779 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
780 LDAP_BACK_RETRY_DEFAULT, &text );
781 if ( rc != LDAP_SUCCESS ) {
785 #endif /* HAVE_TLS */
787 /* FIXME: add checks on the URL/identity? */
789 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
790 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
799 ldap_back_send_t sendok )
802 LDAPMessage *res = NULL;
805 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
808 rs->sr_matched = NULL;
810 /* if the error recorded in the reply corresponds
811 * to a successful state, get the error from the
812 * remote server response */
813 if ( ERR_OK( rs->sr_err ) ) {
817 LDAP_BACK_TV_SET( &tv );
820 /* if result parsing fails, note the failure reason */
821 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
823 LDAP_BACK_TV_SET( &tv );
824 ldap_pvt_thread_yield();
828 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
833 /* otherwise get the result; if it is not
834 * LDAP_SUCCESS, record it in the reply
835 * structure (this includes
836 * LDAP_COMPARE_{TRUE|FALSE}) */
838 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
839 &match, &text, NULL, NULL, 1 );
841 if ( rc != LDAP_SUCCESS ) {
847 /* if the error in the reply structure is not
848 * LDAP_SUCCESS, try to map it from client
850 if ( !ERR_OK( rs->sr_err ) ) {
851 rs->sr_err = slap_map_api2result( rs );
853 /* internal ops ( op->o_conn == NULL )
854 * must not reply to client */
855 if ( op->o_conn && !op->o_do_not_cache && match ) {
857 /* record the (massaged) matched
858 * DN into the reply structure */
859 rs->sr_matched = match;
863 ( ( sendok & LDAP_BACK_SENDOK )
864 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
866 send_ldap_result( op, rs );
869 if ( rs->sr_matched != match ) {
870 free( (char *)rs->sr_matched );
872 rs->sr_matched = NULL;
873 ldap_memfree( match );
876 ldap_memfree( text );
879 return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
882 /* return true if bound, false if failed */
884 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
887 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
889 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
891 if ( lc->lc_refcnt == 1 ) {
892 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
894 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
896 /* lc here must be the regular lc, reset and ready for init */
897 rc = ldap_back_prepare_conn( &lc, op, rs, sendok );
898 if ( rc == LDAP_SUCCESS ) {
899 rc = ldap_back_dobind_int( lc, op, rs, sendok, 0, 0 );
903 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
909 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
911 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
912 struct berval binddn = slap_empty_bv;
913 struct berval bindcred = slap_empty_bv;
919 * FIXME: we need to let clients use proxyAuthz
920 * otherwise we cannot do symmetric pools of servers;
921 * we have to live with the fact that a user can
922 * authorize itself as any ID that is allowed
923 * by the authzTo directive of the "proxyauthzdn".
926 * NOTE: current Proxy Authorization specification
927 * and implementation do not allow proxy authorization
928 * control to be provided with Bind requests
931 * if no bind took place yet, but the connection is bound
932 * and the "proxyauthzdn" is set, then bind as
933 * "proxyauthzdn" and explicitly add the proxyAuthz
934 * control to every operation with the dn bound
935 * to the connection as control value.
938 /* bind as proxyauthzdn only if no idassert mode
939 * is requested, or if the client's identity
941 switch ( li->idassert_mode ) {
942 case LDAP_BACK_IDASSERT_LEGACY:
943 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
944 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
946 binddn = li->idassert_authcDN;
947 bindcred = li->idassert_passwd;
954 /* NOTE: rootdn can always idassert */
955 if ( li->idassert_authz && !be_isroot( op ) ) {
956 struct berval authcDN;
958 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
959 authcDN = slap_empty_bv;
962 authcDN = op->o_conn->c_ndn;
964 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
965 &authcDN, &authcDN );
966 if ( rs->sr_err != LDAP_SUCCESS ) {
967 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
968 send_ldap_result( op, rs );
969 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
972 rs->sr_err = LDAP_SUCCESS;
973 binddn = slap_empty_bv;
974 bindcred = slap_empty_bv;
982 binddn = li->idassert_authcDN;
983 bindcred = li->idassert_passwd;
988 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
989 #ifdef HAVE_CYRUS_SASL
990 void *defaults = NULL;
991 struct berval authzID = BER_BVNULL;
994 /* if SASL supports native authz, prepare for it */
995 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
996 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
998 switch ( li->idassert_mode ) {
999 case LDAP_BACK_IDASSERT_OTHERID:
1000 case LDAP_BACK_IDASSERT_OTHERDN:
1001 authzID = li->idassert_authzID;
1004 case LDAP_BACK_IDASSERT_ANONYMOUS:
1005 BER_BVSTR( &authzID, "dn:" );
1008 case LDAP_BACK_IDASSERT_SELF:
1009 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1010 /* connection is not authc'd, so don't idassert */
1011 BER_BVSTR( &authzID, "dn:" );
1014 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
1015 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1016 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1017 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1018 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
1027 if ( li->idassert_secprops != NULL ) {
1028 rs->sr_err = ldap_set_option( lc->lc_ld,
1029 LDAP_OPT_X_SASL_SECPROPS,
1030 (void *)li->idassert_secprops );
1032 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1033 send_ldap_result( op, rs );
1034 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1039 defaults = lutil_sasl_defaults( lc->lc_ld,
1040 li->idassert_sasl_mech.bv_val,
1041 li->idassert_sasl_realm.bv_val,
1042 li->idassert_authcID.bv_val,
1043 li->idassert_passwd.bv_val,
1046 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
1047 li->idassert_sasl_mech.bv_val, NULL, NULL,
1048 LDAP_SASL_QUIET, lutil_sasl_interact,
1051 rs->sr_err = slap_map_api2result( rs );
1052 if ( rs->sr_err != LDAP_SUCCESS ) {
1053 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1054 send_ldap_result( op, rs );
1057 LDAP_BACK_CONN_ISBOUND_SET( lc );
1060 lutil_sasl_freedefs( defaults );
1062 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1066 #endif /* HAVE_CYRUS_SASL */
1069 switch ( li->idassert_authmethod ) {
1070 case LDAP_AUTH_NONE:
1071 LDAP_BACK_CONN_ISBOUND_SET( lc );
1074 case LDAP_AUTH_SIMPLE:
1075 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1076 binddn.bv_val, LDAP_SASL_SIMPLE,
1077 &bindcred, NULL, NULL, &msgid );
1082 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1083 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1084 send_ldap_result( op, rs );
1088 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
1089 if ( rc == LDAP_SUCCESS ) {
1090 LDAP_BACK_CONN_ISBOUND_SET( lc );
1093 return LDAP_BACK_CONN_ISBOUND( lc );
1097 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
1098 * to existing server-side controls if required; if not,
1099 * the existing server-side controls are placed in *pctrls.
1100 * The caller, after using the controls in client API
1101 * operations, if ( *pctrls != op->o_ctrls ), should
1102 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
1103 * The function returns success if the control could
1104 * be added if required, or if it did nothing; in the future,
1105 * it might return some error if it failed.
1107 * if no bind took place yet, but the connection is bound
1108 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
1109 * and explicitly add proxyAuthz the control to every operation
1110 * with the dn bound to the connection as control value.
1112 * If no server-side controls are defined for the operation,
1113 * simply add the proxyAuthz control; otherwise, if the
1114 * proxyAuthz control is not already set, add it as
1117 * FIXME: is controls order significant for security?
1118 * ANSWER: controls ordering and interoperability
1119 * must be indicated by the specs of each control; if none
1120 * is specified, the order is irrelevant.
1123 ldap_back_proxy_authz_ctrl(
1124 struct ldapconn *lc,
1127 LDAPControl ***pctrls )
1129 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
1130 LDAPControl **ctrls = NULL;
1133 struct berval assertedID;
1137 rs->sr_err = LDAP_SUCCESS;
1139 /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
1140 * but if it is not set this test fails. We need a different
1141 * means to detect if idassert is enabled */
1142 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
1143 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) )
1148 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
1152 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
1153 if ( op->o_proxy_authz ) {
1155 * FIXME: we do not want to perform proxyAuthz
1156 * on behalf of the client, because this would
1157 * be performed with "proxyauthzdn" privileges.
1159 * This might actually be too strict, since
1160 * the "proxyauthzdn" authzTo, and each entry's
1161 * authzFrom attributes may be crafted
1162 * to avoid unwanted proxyAuthz to take place.
1165 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1166 rs->sr_text = "proxyAuthz not allowed within namingContext";
1171 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1175 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1179 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
1183 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
1184 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1185 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn )
1186 || LDAP_BACK_CONN_ISBOUND( lc ) ) */ )
1188 /* already asserted in SASL via native authz */
1189 /* NOTE: the test on lc->lc_bound is used to trap
1190 * native authorization of anonymous users,
1191 * since in that case op->o_conn->c_ndn is NULL */
1195 } else if ( li->idassert_authz && !be_isroot( op ) ) {
1197 struct berval authcDN;
1199 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1200 authcDN = slap_empty_bv;
1202 authcDN = op->o_conn->c_ndn;
1204 rc = slap_sasl_matches( op, li->idassert_authz,
1205 &authcDN, & authcDN );
1206 if ( rc != LDAP_SUCCESS ) {
1207 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
1209 /* op->o_conn->c_ndn is not authorized
1210 * to use idassert */
1217 if ( op->o_proxy_authz ) {
1220 * 1) ignore the already set proxyAuthz control
1221 * 2) leave it in place, and don't set ours
1223 * 4) reject the operation
1225 * option (4) is very drastic
1226 * option (3) will make the remote server reject
1227 * the operation, thus being equivalent to (4)
1228 * option (2) will likely break the idassert
1229 * assumptions, so we cannot accept it;
1230 * option (1) means that we are contradicting
1231 * the client's reques.
1233 * I think (4) is the only correct choice.
1235 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1236 rs->sr_text = "proxyAuthz not allowed within namingContext";
1239 if ( op->o_do_not_cache && op->o_is_auth_check ) {
1240 mode = LDAP_BACK_IDASSERT_NOASSERT;
1243 mode = li->idassert_mode;
1247 case LDAP_BACK_IDASSERT_LEGACY:
1248 case LDAP_BACK_IDASSERT_SELF:
1249 /* original behavior:
1250 * assert the client's identity */
1251 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1252 assertedID = slap_empty_bv;
1254 assertedID = op->o_conn->c_ndn;
1258 case LDAP_BACK_IDASSERT_ANONYMOUS:
1259 /* assert "anonymous" */
1260 assertedID = slap_empty_bv;
1263 case LDAP_BACK_IDASSERT_NOASSERT:
1264 /* don't assert; bind as proxyauthzdn */
1267 case LDAP_BACK_IDASSERT_OTHERID:
1268 case LDAP_BACK_IDASSERT_OTHERDN:
1269 /* assert idassert DN */
1270 assertedID = li->idassert_authzID;
1277 if ( BER_BVISNULL( &assertedID ) ) {
1278 assertedID = slap_empty_bv;
1281 if ( op->o_ctrls ) {
1282 for ( i = 0; op->o_ctrls[ i ]; i++ )
1283 /* just count ctrls */ ;
1286 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1287 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1289 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1290 ctrls[ 0 ]->ldctl_iscritical = 1;
1292 switch ( li->idassert_mode ) {
1293 /* already in u:ID or dn:DN form */
1294 case LDAP_BACK_IDASSERT_OTHERID:
1295 case LDAP_BACK_IDASSERT_OTHERDN:
1296 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1299 /* needs the dn: prefix */
1301 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1302 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1303 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1304 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
1305 assertedID.bv_val, assertedID.bv_len + 1 );
1309 if ( op->o_ctrls ) {
1310 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1311 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1314 ctrls[ i + 1 ] = NULL;
1317 if ( ctrls == NULL ) {
1318 ctrls = op->o_ctrls;
1327 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1329 LDAPControl **ctrls = *pctrls;
1331 /* we assume that the first control is the proxyAuthz
1332 * added by back-ldap, so it's the only one we explicitly
1334 if ( ctrls && ctrls != op->o_ctrls ) {
1335 assert( ctrls[ 0 ] != NULL );
1337 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1338 free( ctrls[ 0 ]->ldctl_value.bv_val );