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 );
507 /* FIXME: if we set lc_bound_ndn = o_ndn
508 * we end up with a bind with DN but no password! */
509 if ( !BER_BVISEMPTY( &op->o_ndn )
510 && SLAP_IS_AUTHZ_BACKEND( op ) )
512 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
518 /* if start TLS failed but it was not mandatory,
519 * check if the non-TLS connection was already
520 * in cache; in case, destroy the newly created
521 * connection and use the existing one */
522 if ( lc->lc_conn == LDAP_BACK_PCONN_TLS
523 && !ldap_tls_inplace( lc->lc_ld ) )
525 struct ldapconn *tmplc;
527 lc_curr.lc_conn = LDAP_BACK_PCONN;
528 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
529 tmplc = (struct ldapconn *)avl_find( li->conntree,
530 (caddr_t)&lc_curr, ldap_back_conn_cmp );
531 if ( tmplc != NULL ) {
532 refcnt = ++tmplc->lc_refcnt;
533 ldap_back_conn_free( lc );
536 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
538 if ( tmplc != NULL ) {
542 #endif /* HAVE_TLS */
544 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
546 /* Inserts the newly created ldapconn in the avl tree */
547 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
549 assert( lc->lc_refcnt == 1 );
550 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
551 ldap_back_conn_cmp, ldap_back_conn_dup );
553 #if PRINT_CONNTREE > 0
554 myprint( li->conntree );
555 #endif /* PRINT_CONNTREE */
557 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
559 Debug( LDAP_DEBUG_TRACE,
560 "=>ldap_back_getconn: conn %p inserted (refcnt=%u)\n",
561 (void *)lc, refcnt, 0 );
563 /* Err could be -1 in case a duplicate ldapconn is inserted */
564 if ( rs->sr_err != 0 ) {
565 ldap_back_conn_free( lc );
566 rs->sr_err = LDAP_OTHER;
567 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
568 send_ldap_error( op, rs, LDAP_OTHER,
569 "internal server error" );
575 Debug( LDAP_DEBUG_TRACE,
576 "=>ldap_back_getconn: conn %p fetched (refcnt=%u)\n",
577 (void *)lc, refcnt, 0 );
585 ldap_back_release_conn(
588 struct ldapconn *lc )
590 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
592 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
593 assert( lc->lc_refcnt > 0 );
595 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
601 * Note: as the check for the value of lc->lc_bound was already here, I removed
602 * it from all the callers, and I made the function return the flag, so
603 * it can be used to simplify the check.
605 * Note: dolock indicates whether li->conn_mutex must be locked or not
608 ldap_back_dobind_int(
612 ldap_back_send_t sendok,
616 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
618 int rc = LDAP_BACK_CONN_ISBOUND( lc );
621 assert( retries >= 0 );
628 * FIXME: we need to let clients use proxyAuthz
629 * otherwise we cannot do symmetric pools of servers;
630 * we have to live with the fact that a user can
631 * authorize itself as any ID that is allowed
632 * by the authzTo directive of the "proxyauthzdn".
635 * NOTE: current Proxy Authorization specification
636 * and implementation do not allow proxy authorization
637 * control to be provided with Bind requests
640 * if no bind took place yet, but the connection is bound
641 * and the "idassert-authcDN" (or other ID) is set,
642 * then bind as the asserting identity and explicitly
643 * add the proxyAuthz control to every operation with the
644 * dn bound to the connection as control value.
645 * This is done also if this is the authrizing backend,
646 * but the "override" flag is given to idassert.
647 * It allows to use SASL bind and yet proxyAuthz users
649 if ( op->o_conn != NULL &&
650 !op->o_do_not_cache &&
651 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
652 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
654 (void)ldap_back_proxy_authz_bind( lc, op, rs );
658 #ifdef HAVE_CYRUS_SASL
659 if ( LDAP_BACK_CONN_ISPRIV( lc )
660 && li->acl_authmethod == LDAP_AUTH_SASL )
662 void *defaults = NULL;
664 if ( li->acl_secprops != NULL ) {
665 rc = ldap_set_option( lc->lc_ld,
666 LDAP_OPT_X_SASL_SECPROPS, li->acl_secprops);
668 if ( rc != LDAP_OPT_SUCCESS ) {
669 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
670 "(%s,SECPROPS,\"%s\") failed!\n",
671 li->url, li->acl_secprops, 0 );
676 defaults = lutil_sasl_defaults( lc->lc_ld,
677 li->acl_sasl_mech.bv_val,
678 li->acl_sasl_realm.bv_val,
679 li->acl_authcID.bv_val,
680 li->acl_passwd.bv_val,
683 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
684 li->acl_authcDN.bv_val,
685 li->acl_sasl_mech.bv_val, NULL, NULL,
686 LDAP_SASL_QUIET, lutil_sasl_interact,
689 lutil_sasl_freedefs( defaults );
691 rs->sr_err = slap_map_api2result( rs );
692 if ( rs->sr_err != LDAP_SUCCESS ) {
693 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
694 send_ldap_result( op, rs );
697 LDAP_BACK_CONN_ISBOUND_SET( lc );
701 #endif /* HAVE_CYRUS_SASL */
704 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
705 lc->lc_bound_ndn.bv_val,
706 LDAP_SASL_SIMPLE, &lc->lc_cred,
707 NULL, NULL, &msgid );
709 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
710 if ( retries != LDAP_BACK_RETRY_NEVER ) {
712 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
715 assert( lc->lc_refcnt > 0 );
716 if ( lc->lc_refcnt == 1 ) {
717 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
720 /* lc here must be the regular lc, reset and ready for init */
721 rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
724 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
726 if ( rs->sr_err == LDAP_SUCCESS ) {
734 ldap_back_freeconn( op, lc );
735 rs->sr_err = slap_map_api2result( rs );
740 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
741 if ( rc == LDAP_SUCCESS ) {
742 LDAP_BACK_CONN_ISBOUND_SET( lc );
745 ldap_back_release_conn( op, rs, lc );
749 rc = LDAP_BACK_CONN_ISBOUND( lc );
755 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
757 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
759 return ldap_back_dobind_int( lc, op, rs, sendok, li->nretries, 1 );
763 * ldap_back_default_rebind
765 * This is a callback used for chasing referrals using the same
766 * credentials as the original user on this session.
769 ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
770 ber_int_t msgid, void *params )
772 struct ldapconn *lc = (struct ldapconn *)params;
775 /* ... otherwise we couldn't get here */
776 assert( lc != NULL );
778 if ( !ldap_tls_inplace( ld ) ) {
779 int is_tls = LDAP_BACK_CONN_ISTLS( lc ),
781 const char *text = NULL;
783 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
784 LDAP_BACK_RETRY_DEFAULT, &text );
785 if ( rc != LDAP_SUCCESS ) {
789 #endif /* HAVE_TLS */
791 /* FIXME: add checks on the URL/identity? */
793 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
794 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
803 ldap_back_send_t sendok )
806 LDAPMessage *res = NULL;
809 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
812 rs->sr_matched = NULL;
814 /* if the error recorded in the reply corresponds
815 * to a successful state, get the error from the
816 * remote server response */
817 if ( ERR_OK( rs->sr_err ) ) {
821 LDAP_BACK_TV_SET( &tv );
824 /* if result parsing fails, note the failure reason */
825 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
827 LDAP_BACK_TV_SET( &tv );
828 ldap_pvt_thread_yield();
832 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
837 /* otherwise get the result; if it is not
838 * LDAP_SUCCESS, record it in the reply
839 * structure (this includes
840 * LDAP_COMPARE_{TRUE|FALSE}) */
842 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
843 &match, &text, NULL, NULL, 1 );
845 if ( rc != LDAP_SUCCESS ) {
851 /* if the error in the reply structure is not
852 * LDAP_SUCCESS, try to map it from client
854 if ( !ERR_OK( rs->sr_err ) ) {
855 rs->sr_err = slap_map_api2result( rs );
857 /* internal ops ( op->o_conn == NULL )
858 * must not reply to client */
859 if ( op->o_conn && !op->o_do_not_cache && match ) {
861 /* record the (massaged) matched
862 * DN into the reply structure */
863 rs->sr_matched = match;
867 ( ( sendok & LDAP_BACK_SENDOK )
868 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
870 send_ldap_result( op, rs );
873 if ( rs->sr_matched != match ) {
874 free( (char *)rs->sr_matched );
876 rs->sr_matched = NULL;
877 ldap_memfree( match );
880 ldap_memfree( text );
883 return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
886 /* return true if bound, false if failed */
888 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
891 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
893 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
895 if ( lc->lc_refcnt == 1 ) {
896 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
898 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
900 /* lc here must be the regular lc, reset and ready for init */
901 rc = ldap_back_prepare_conn( &lc, op, rs, sendok );
902 if ( rc == LDAP_SUCCESS ) {
903 rc = ldap_back_dobind_int( lc, op, rs, sendok, 0, 0 );
907 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
913 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
915 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
916 struct berval binddn = slap_empty_bv;
917 struct berval bindcred = slap_empty_bv;
923 * FIXME: we need to let clients use proxyAuthz
924 * otherwise we cannot do symmetric pools of servers;
925 * we have to live with the fact that a user can
926 * authorize itself as any ID that is allowed
927 * by the authzTo directive of the "proxyauthzdn".
930 * NOTE: current Proxy Authorization specification
931 * and implementation do not allow proxy authorization
932 * control to be provided with Bind requests
935 * if no bind took place yet, but the connection is bound
936 * and the "proxyauthzdn" is set, then bind as
937 * "proxyauthzdn" and explicitly add the proxyAuthz
938 * control to every operation with the dn bound
939 * to the connection as control value.
942 /* bind as proxyauthzdn only if no idassert mode
943 * is requested, or if the client's identity
945 switch ( li->idassert_mode ) {
946 case LDAP_BACK_IDASSERT_LEGACY:
947 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
948 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
950 binddn = li->idassert_authcDN;
951 bindcred = li->idassert_passwd;
958 /* NOTE: rootdn can always idassert */
959 if ( li->idassert_authz && !be_isroot( op ) ) {
960 struct berval authcDN;
962 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
963 authcDN = slap_empty_bv;
966 authcDN = op->o_conn->c_ndn;
968 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
969 &authcDN, &authcDN );
970 if ( rs->sr_err != LDAP_SUCCESS ) {
971 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
972 send_ldap_result( op, rs );
973 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
976 rs->sr_err = LDAP_SUCCESS;
977 binddn = slap_empty_bv;
978 bindcred = slap_empty_bv;
986 binddn = li->idassert_authcDN;
987 bindcred = li->idassert_passwd;
992 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
993 #ifdef HAVE_CYRUS_SASL
994 void *defaults = NULL;
995 struct berval authzID = BER_BVNULL;
998 /* if SASL supports native authz, prepare for it */
999 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1000 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1002 switch ( li->idassert_mode ) {
1003 case LDAP_BACK_IDASSERT_OTHERID:
1004 case LDAP_BACK_IDASSERT_OTHERDN:
1005 authzID = li->idassert_authzID;
1008 case LDAP_BACK_IDASSERT_ANONYMOUS:
1009 BER_BVSTR( &authzID, "dn:" );
1012 case LDAP_BACK_IDASSERT_SELF:
1013 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1014 /* connection is not authc'd, so don't idassert */
1015 BER_BVSTR( &authzID, "dn:" );
1018 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
1019 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1020 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1021 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1022 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
1031 if ( li->idassert_secprops != NULL ) {
1032 rs->sr_err = ldap_set_option( lc->lc_ld,
1033 LDAP_OPT_X_SASL_SECPROPS,
1034 (void *)li->idassert_secprops );
1036 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1037 send_ldap_result( op, rs );
1038 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1043 defaults = lutil_sasl_defaults( lc->lc_ld,
1044 li->idassert_sasl_mech.bv_val,
1045 li->idassert_sasl_realm.bv_val,
1046 li->idassert_authcID.bv_val,
1047 li->idassert_passwd.bv_val,
1050 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
1051 li->idassert_sasl_mech.bv_val, NULL, NULL,
1052 LDAP_SASL_QUIET, lutil_sasl_interact,
1055 rs->sr_err = slap_map_api2result( rs );
1056 if ( rs->sr_err != LDAP_SUCCESS ) {
1057 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1058 send_ldap_result( op, rs );
1061 LDAP_BACK_CONN_ISBOUND_SET( lc );
1064 lutil_sasl_freedefs( defaults );
1066 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1070 #endif /* HAVE_CYRUS_SASL */
1073 switch ( li->idassert_authmethod ) {
1074 case LDAP_AUTH_NONE:
1075 LDAP_BACK_CONN_ISBOUND_SET( lc );
1078 case LDAP_AUTH_SIMPLE:
1079 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1080 binddn.bv_val, LDAP_SASL_SIMPLE,
1081 &bindcred, NULL, NULL, &msgid );
1086 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1087 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1088 send_ldap_result( op, rs );
1092 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
1093 if ( rc == LDAP_SUCCESS ) {
1094 LDAP_BACK_CONN_ISBOUND_SET( lc );
1097 return LDAP_BACK_CONN_ISBOUND( lc );
1101 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
1102 * to existing server-side controls if required; if not,
1103 * the existing server-side controls are placed in *pctrls.
1104 * The caller, after using the controls in client API
1105 * operations, if ( *pctrls != op->o_ctrls ), should
1106 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
1107 * The function returns success if the control could
1108 * be added if required, or if it did nothing; in the future,
1109 * it might return some error if it failed.
1111 * if no bind took place yet, but the connection is bound
1112 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
1113 * and explicitly add proxyAuthz the control to every operation
1114 * with the dn bound to the connection as control value.
1116 * If no server-side controls are defined for the operation,
1117 * simply add the proxyAuthz control; otherwise, if the
1118 * proxyAuthz control is not already set, add it as
1121 * FIXME: is controls order significant for security?
1122 * ANSWER: controls ordering and interoperability
1123 * must be indicated by the specs of each control; if none
1124 * is specified, the order is irrelevant.
1127 ldap_back_proxy_authz_ctrl(
1128 struct ldapconn *lc,
1131 LDAPControl ***pctrls )
1133 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
1134 LDAPControl **ctrls = NULL;
1137 struct berval assertedID;
1141 rs->sr_err = LDAP_SUCCESS;
1143 /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
1144 * but if it is not set this test fails. We need a different
1145 * means to detect if idassert is enabled */
1146 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
1147 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) )
1152 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
1156 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
1157 if ( op->o_proxy_authz ) {
1159 * FIXME: we do not want to perform proxyAuthz
1160 * on behalf of the client, because this would
1161 * be performed with "proxyauthzdn" privileges.
1163 * This might actually be too strict, since
1164 * the "proxyauthzdn" authzTo, and each entry's
1165 * authzFrom attributes may be crafted
1166 * to avoid unwanted proxyAuthz to take place.
1169 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1170 rs->sr_text = "proxyAuthz not allowed within namingContext";
1175 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1179 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1183 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
1187 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
1188 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1189 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn )
1190 || LDAP_BACK_CONN_ISBOUND( lc ) ) */ )
1192 /* already asserted in SASL via native authz */
1193 /* NOTE: the test on lc->lc_bound is used to trap
1194 * native authorization of anonymous users,
1195 * since in that case op->o_conn->c_ndn is NULL */
1199 } else if ( li->idassert_authz && !be_isroot( op ) ) {
1201 struct berval authcDN;
1203 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1204 authcDN = slap_empty_bv;
1206 authcDN = op->o_conn->c_ndn;
1208 rc = slap_sasl_matches( op, li->idassert_authz,
1209 &authcDN, & authcDN );
1210 if ( rc != LDAP_SUCCESS ) {
1211 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
1213 /* op->o_conn->c_ndn is not authorized
1214 * to use idassert */
1221 if ( op->o_proxy_authz ) {
1224 * 1) ignore the already set proxyAuthz control
1225 * 2) leave it in place, and don't set ours
1227 * 4) reject the operation
1229 * option (4) is very drastic
1230 * option (3) will make the remote server reject
1231 * the operation, thus being equivalent to (4)
1232 * option (2) will likely break the idassert
1233 * assumptions, so we cannot accept it;
1234 * option (1) means that we are contradicting
1235 * the client's reques.
1237 * I think (4) is the only correct choice.
1239 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1240 rs->sr_text = "proxyAuthz not allowed within namingContext";
1243 if ( op->o_do_not_cache && op->o_is_auth_check ) {
1244 mode = LDAP_BACK_IDASSERT_NOASSERT;
1247 mode = li->idassert_mode;
1251 case LDAP_BACK_IDASSERT_LEGACY:
1252 case LDAP_BACK_IDASSERT_SELF:
1253 /* original behavior:
1254 * assert the client's identity */
1255 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1256 assertedID = slap_empty_bv;
1258 assertedID = op->o_conn->c_ndn;
1262 case LDAP_BACK_IDASSERT_ANONYMOUS:
1263 /* assert "anonymous" */
1264 assertedID = slap_empty_bv;
1267 case LDAP_BACK_IDASSERT_NOASSERT:
1268 /* don't assert; bind as proxyauthzdn */
1271 case LDAP_BACK_IDASSERT_OTHERID:
1272 case LDAP_BACK_IDASSERT_OTHERDN:
1273 /* assert idassert DN */
1274 assertedID = li->idassert_authzID;
1281 if ( BER_BVISNULL( &assertedID ) ) {
1282 assertedID = slap_empty_bv;
1285 if ( op->o_ctrls ) {
1286 for ( i = 0; op->o_ctrls[ i ]; i++ )
1287 /* just count ctrls */ ;
1290 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1291 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1293 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1294 ctrls[ 0 ]->ldctl_iscritical = 1;
1296 switch ( li->idassert_mode ) {
1297 /* already in u:ID or dn:DN form */
1298 case LDAP_BACK_IDASSERT_OTHERID:
1299 case LDAP_BACK_IDASSERT_OTHERDN:
1300 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1303 /* needs the dn: prefix */
1305 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1306 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1307 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1308 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
1309 assertedID.bv_val, assertedID.bv_len + 1 );
1313 if ( op->o_ctrls ) {
1314 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1315 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1318 ctrls[ i + 1 ] = NULL;
1321 if ( ctrls == NULL ) {
1322 ctrls = op->o_ctrls;
1331 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1333 LDAPControl **ctrls = *pctrls;
1335 /* we assume that the first control is the proxyAuthz
1336 * added by back-ldap, so it's the only one we explicitly
1338 if ( ctrls && ctrls != op->o_ctrls ) {
1339 assert( ctrls[ 0 ] != NULL );
1341 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1342 free( ctrls[ 0 ]->ldctl_value.bv_val );