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_rebind;
43 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs );
46 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
49 ldap_back_bind( Operation *op, SlapReply *rs )
51 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
57 lc = ldap_back_getconn( op, rs, LDAP_BACK_SENDERR );
62 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
63 ch_free( lc->lc_bound_ndn.bv_val );
64 BER_BVZERO( &lc->lc_bound_ndn );
68 /* method is always LDAP_AUTH_SIMPLE if we got here */
69 rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
71 &op->orb_cred, op->o_ctrls, NULL, &msgid );
72 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
74 if ( rc == LDAP_SUCCESS ) {
75 /* If defined, proxyAuthz will be used also when
76 * back-ldap is the authorizing backend; for this
77 * purpose, a successful bind is followed by a
78 * bind with the configured identity assertion */
79 /* NOTE: use with care */
80 if ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
81 ldap_back_proxy_authz_bind( lc, op, rs );
82 if ( lc->lc_bound == 0 ) {
89 ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
91 if ( LDAP_BACK_SAVECRED( li ) ) {
92 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
93 memset( lc->lc_cred.bv_val, 0,
96 ber_bvreplace( &lc->lc_cred, &op->orb_cred );
97 ldap_set_rebind_proc( lc->lc_ld, ldap_back_rebind, lc );
102 /* must re-insert if local DN changed as result of bind */
103 if ( lc->lc_bound && !dn_match( &op->o_req_ndn, &lc->lc_local_ndn ) ) {
106 /* wait for all other ops to release the connection */
108 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
109 case LDAP_PVT_THREAD_EBUSY:
111 ldap_pvt_thread_yield();
115 if ( lc->lc_refcnt > 1 ) {
116 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
117 ldap_pvt_thread_yield();
123 assert( lc->lc_refcnt == 1 );
124 lc = avl_delete( &li->conntree, (caddr_t)lc,
125 ldap_back_conn_cmp );
126 assert( lc != NULL );
128 ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn );
129 lerr = avl_insert( &li->conntree, (caddr_t)lc,
130 ldap_back_conn_cmp, ldap_back_conn_dup );
131 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
133 /* we can do this because lc_refcnt == 1 */
134 ldap_back_conn_free( lc );
140 ldap_back_release_conn( op, rs, lc );
149 * compares two struct ldapconn based on the value of the conn pointer;
153 ldap_back_conn_cmp( const void *c1, const void *c2 )
155 const struct ldapconn *lc1 = (const struct ldapconn *)c1;
156 const struct ldapconn *lc2 = (const struct ldapconn *)c2;
159 /* If local DNs don't match, it is definitely not a match */
160 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
165 /* For shared sessions, conn is NULL. Only explicitly
166 * bound sessions will have non-NULL conn.
168 return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
174 * returns -1 in case a duplicate struct ldapconn has been inserted;
178 ldap_back_conn_dup( void *c1, void *c2 )
180 struct ldapconn *lc1 = (struct ldapconn *)c1;
181 struct ldapconn *lc2 = (struct ldapconn *)c2;
183 /* Cannot have more than one shared session with same DN */
184 if ( dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) &&
185 lc1->lc_conn == lc2->lc_conn )
193 #if PRINT_CONNTREE > 0
195 ravl_print( Avlnode *root, int depth )
204 ravl_print( root->avl_right, depth+1 );
206 for ( i = 0; i < depth; i++ ) {
211 printf( "lc(%lx) local(%s) conn(%lx) %d\n",
212 lc, lc->lc_local_ndn.bv_val, lc->lc_conn, root->avl_bf );
214 ravl_print( root->avl_left, depth+1 );
218 myprint( Avlnode *root )
220 printf( "********\n" );
223 printf( "\tNULL\n" );
226 ravl_print( root, 0 );
229 printf( "********\n" );
231 #endif /* PRINT_CONNTREE */
234 ldap_back_freeconn( Operation *op, struct ldapconn *lc )
236 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
238 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
240 assert( lc->lc_refcnt > 0 );
241 if ( --lc->lc_refcnt == 0 ) {
242 lc = avl_delete( &li->conntree, (caddr_t)lc,
243 ldap_back_conn_cmp );
244 assert( lc != NULL );
246 ldap_back_conn_free( (void *)lc );
249 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
264 int rc = LDAP_SUCCESS;
267 /* this is ridicolous... */
270 /* start TLS ("tls-[try-]{start,propagate}" statements) */
271 if ( ( LDAP_BACK_USE_TLS( &li ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS( &li ) ) )
272 && !ldap_is_ldaps_url( url ) )
274 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
276 * use asynchronous StartTLS
277 * in case, chase referral (not implemented yet)
281 if ( protocol == 0 ) {
282 ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION,
286 if ( protocol < LDAP_VERSION3 ) {
287 protocol = LDAP_VERSION3;
288 /* Set LDAP version */
289 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION,
290 (const void *)&protocol );
293 rc = ldap_start_tls( ld, NULL, NULL, &msgid );
294 if ( rc == LDAP_SUCCESS ) {
295 LDAPMessage *res = NULL;
297 struct timeval tv = { 0, 0 };
300 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
304 } else if ( rc == 0 ) {
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( &li ) ) {
371 *text = "could not start TLS";
375 /* in case Start TLS is not critical */
388 #endif /* HAVE_TLS */
391 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
393 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
394 int vers = op->o_protocol;
397 int is_tls = op->o_conn->c_is_tls;
398 #endif /* HAVE_TLS */
400 assert( lcp != NULL );
402 rs->sr_err = ldap_initialize( &ld, li->url );
403 if ( rs->sr_err != LDAP_SUCCESS ) {
407 /* Set LDAP version. This will always succeed: If the client
408 * bound with a particular version, then so can we.
410 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&vers );
412 /* automatically chase referrals ("[dont-]chase-referrals" statement) */
413 if ( LDAP_BACK_CHASE_REFERRALS( li ) ) {
414 ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
418 rs->sr_err = ldap_back_start_tls( ld,
419 op->o_protocol, &is_tls,
420 li->url, li->flags, &rs->sr_text );
421 if ( rs->sr_err != LDAP_SUCCESS ) {
422 ldap_unbind_ext( ld, NULL, NULL );
425 #endif /* HAVE_TLS */
427 if ( *lcp == NULL ) {
428 *lcp = (struct ldapconn *)ch_calloc( 1, sizeof( struct ldapconn ) );
429 (*lcp)->lc_flags= li->flags;
432 (*lcp)->lc_refcnt = 1;
434 (*lcp)->lc_is_tls = is_tls;
435 #endif /* HAVE_TLS */
438 if ( rs->sr_err != LDAP_SUCCESS ) {
439 rs->sr_err = slap_map_api2result( rs );
440 if ( sendok & LDAP_BACK_SENDERR ) {
441 if ( rs->sr_text == NULL ) {
442 rs->sr_text = "ldap_initialize() failed";
444 send_ldap_result( op, rs );
453 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
455 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
460 /* Searches for a ldapconn in the avl tree */
462 /* Explicit binds must not be shared */
463 if ( op->o_tag == LDAP_REQ_BIND
465 && op->o_conn->c_authz_backend
466 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private ) )
468 lc_curr.lc_conn = op->o_conn;
472 if ( op->o_conn->c_is_tls ) {
473 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN_TLS;
475 #endif /* HAVE_TLS */
477 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN;
481 /* Internal searches are privileged and shared. So is root. */
482 /* FIXME: there seem to be concurrency issues */
483 if ( op->o_do_not_cache || be_isroot( op ) ) {
484 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
486 if ( op->o_conn->c_is_tls ) {
487 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN_TLS;
489 #endif /* HAVE_TLS */
491 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN;
493 lc_curr.lc_ispriv = 1;
496 lc_curr.lc_local_ndn = op->o_ndn;
499 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
501 lc = (struct ldapconn *)avl_find( li->conntree,
502 (caddr_t)&lc_curr, ldap_back_conn_cmp );
504 refcnt = ++lc->lc_refcnt;
506 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
508 /* Looks like we didn't get a bind. Open a new session... */
510 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
514 lc->lc_conn = lc_curr.lc_conn;
515 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
517 if ( lc_curr.lc_ispriv ) {
518 ber_dupbv( &lc->lc_cred, &li->acl_passwd );
519 ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
520 lc->lc_ispriv = lc_curr.lc_ispriv;
523 BER_BVZERO( &lc->lc_cred );
524 BER_BVZERO( &lc->lc_bound_ndn );
525 if ( op->o_conn && !BER_BVISEMPTY( &op->o_ndn )
526 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private )
528 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
533 /* if start TLS failed but it was not mandatory,
534 * check if the non-TLS connection was already
535 * in cache; in case, destroy the newly created
536 * connection and use the existing one */
537 if ( lc->lc_conn == LDAP_BACK_PRIV_CONN_TLS
538 && !ldap_tls_inplace( lc->lc_ld ) )
540 struct ldapconn *tmplc;
542 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN;
543 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
544 tmplc = (struct ldapconn *)avl_find( li->conntree,
545 (caddr_t)&lc_curr, ldap_back_conn_cmp );
546 if ( tmplc != NULL ) {
547 refcnt = ++tmplc->lc_refcnt;
548 ldap_back_conn_free( lc );
551 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
553 if ( tmplc != NULL ) {
557 #endif /* HAVE_TLS */
561 /* Inserts the newly created ldapconn in the avl tree */
562 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
564 assert( lc->lc_refcnt == 1 );
565 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
566 ldap_back_conn_cmp, ldap_back_conn_dup );
568 #if PRINT_CONNTREE > 0
569 myprint( li->conntree );
570 #endif /* PRINT_CONNTREE */
572 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
574 Debug( LDAP_DEBUG_TRACE,
575 "=>ldap_back_getconn: conn %p inserted (refcnt=%u)\n",
576 (void *)lc, refcnt, 0 );
578 /* Err could be -1 in case a duplicate ldapconn is inserted */
579 if ( rs->sr_err != 0 ) {
580 ldap_back_conn_free( lc );
581 rs->sr_err = LDAP_OTHER;
582 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
583 send_ldap_error( op, rs, LDAP_OTHER,
584 "internal server error" );
590 Debug( LDAP_DEBUG_TRACE,
591 "=>ldap_back_getconn: conn %p fetched (refcnt=%u)\n",
592 (void *)lc, refcnt, 0 );
600 ldap_back_release_conn(
603 struct ldapconn *lc )
605 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
607 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
608 assert( lc->lc_refcnt > 0 );
610 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
616 * Note: as the check for the value of lc->lc_bound was already here, I removed
617 * it from all the callers, and I made the function return the flag, so
618 * it can be used to simplify the check.
620 * Note: dolock indicates whether li->conn_mutex must be locked or not
623 ldap_back_dobind_int(
627 ldap_back_send_t sendok,
634 assert( retries >= 0 );
636 if ( !lc->lc_bound ) {
637 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
640 * FIXME: we need to let clients use proxyAuthz
641 * otherwise we cannot do symmetric pools of servers;
642 * we have to live with the fact that a user can
643 * authorize itself as any ID that is allowed
644 * by the authzTo directive of the "proxyauthzdn".
647 * NOTE: current Proxy Authorization specification
648 * and implementation do not allow proxy authorization
649 * control to be provided with Bind requests
652 * if no bind took place yet, but the connection is bound
653 * and the "idassert-authcDN" (or other ID) is set,
654 * then bind as the asserting identity and explicitly
655 * add the proxyAuthz control to every operation with the
656 * dn bound to the connection as control value.
657 * This is done also if this is the authrizing backend,
658 * but the "override" flag is given to idassert.
659 * It allows to use SASL bind and yet proxyAuthz users
661 if ( op->o_conn != NULL &&
662 !op->o_do_not_cache &&
663 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
664 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
666 (void)ldap_back_proxy_authz_bind( lc, op, rs );
670 #ifdef HAVE_CYRUS_SASL
671 if ( lc->lc_ispriv && li->acl_authmethod == LDAP_AUTH_SASL ) {
672 void *defaults = NULL;
674 #if 1 /* will deal with this later... */
675 if ( li->acl_secprops != NULL ) {
676 rc = ldap_set_option( lc->lc_ld,
677 LDAP_OPT_X_SASL_SECPROPS, li->acl_secprops);
679 if( rc != LDAP_OPT_SUCCESS ) {
680 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
681 "(%s,SECPROPS,\"%s\") failed!\n",
682 li->url, li->acl_secprops, 0 );
688 defaults = lutil_sasl_defaults( lc->lc_ld,
689 li->acl_sasl_mech.bv_val,
690 li->acl_sasl_realm.bv_val,
691 li->acl_authcID.bv_val,
692 li->acl_passwd.bv_val,
695 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
696 li->acl_authcDN.bv_val,
697 li->acl_sasl_mech.bv_val, NULL, NULL,
698 LDAP_SASL_QUIET, lutil_sasl_interact,
701 lutil_sasl_freedefs( defaults );
703 rs->sr_err = slap_map_api2result( rs );
704 if ( rs->sr_err != LDAP_SUCCESS ) {
706 send_ldap_result( op, rs );
713 #endif /* HAVE_CYRUS_SASL */
716 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
717 lc->lc_bound_ndn.bv_val,
718 LDAP_SASL_SIMPLE, &lc->lc_cred,
719 NULL, NULL, &msgid );
721 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
724 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
727 assert( lc->lc_refcnt > 0 );
728 if ( lc->lc_refcnt == 1 ) {
729 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
732 /* lc here must be the regular lc, reset and ready for init */
733 rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
736 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
738 if ( rs->sr_err == LDAP_SUCCESS ) {
744 ldap_back_freeconn( op, lc );
745 rs->sr_err = slap_map_api2result( rs );
750 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
751 if ( rc == LDAP_SUCCESS ) {
762 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
764 return ldap_back_dobind_int( lc, op, rs, sendok, 1, 1 );
770 * This is a callback used for chasing referrals using the same
771 * credentials as the original user on this session.
774 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
775 ber_int_t msgid, void *params )
777 struct ldapconn *lc = (struct ldapconn *)params;
780 /* ... otherwise we couldn't get here */
781 assert( lc != NULL );
783 if ( !ldap_tls_inplace( ld ) ) {
784 int is_tls = lc->lc_is_tls,
786 const char *text = NULL;
788 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags, &text );
789 if ( rc != LDAP_SUCCESS ) {
793 #endif /* HAVE_TLS */
795 /* FIXME: add checks on the URL/identity? */
797 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
798 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
807 ldap_back_send_t sendok )
810 LDAPMessage *res = NULL;
813 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
816 rs->sr_matched = NULL;
818 /* if the error recorded in the reply corresponds
819 * to a successful state, get the error from the
820 * remote server response */
821 if ( ERR_OK( rs->sr_err ) ) {
823 struct timeval tv = { 0, 0 };
826 /* if result parsing fails, note the failure reason */
827 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
830 tv.tv_usec = 100000; /* 0.1 s */
831 ldap_pvt_thread_yield();
835 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
840 /* otherwise get the result; if it is not
841 * LDAP_SUCCESS, record it in the reply
842 * structure (this includes
843 * LDAP_COMPARE_{TRUE|FALSE}) */
845 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
846 &match, &text, NULL, NULL, 1 );
848 if ( rc != LDAP_SUCCESS ) {
854 /* if the error in the reply structure is not
855 * LDAP_SUCCESS, try to map it from client
857 if ( !ERR_OK( rs->sr_err ) ) {
858 rs->sr_err = slap_map_api2result( rs );
860 /* internal ops ( op->o_conn == NULL )
861 * must not reply to client */
862 if ( op->o_conn && !op->o_do_not_cache && match ) {
864 /* record the (massaged) matched
865 * DN into the reply structure */
866 rs->sr_matched = match;
870 ( ( sendok & LDAP_BACK_SENDOK )
871 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
873 send_ldap_result( op, rs );
876 if ( rs->sr_matched != match ) {
877 free( (char *)rs->sr_matched );
879 rs->sr_matched = NULL;
880 ldap_memfree( match );
883 ldap_memfree( text );
886 return( ERR_OK( rs->sr_err ) ? 0 : -1 );
889 /* return true if bound, false if failed */
891 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
894 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
896 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
898 if ( lc->lc_refcnt == 1 ) {
899 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
903 /* lc here must be the regular lc, reset and ready for init */
904 rc = ldap_back_prepare_conn( &lc, op, rs, sendok );
905 if ( rc == LDAP_SUCCESS ) {
906 rc = ldap_back_dobind_int( lc, op, rs, sendok, 0, 0 );
910 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
916 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
918 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
919 struct berval binddn = slap_empty_bv;
920 struct berval bindcred = slap_empty_bv;
926 * FIXME: we need to let clients use proxyAuthz
927 * otherwise we cannot do symmetric pools of servers;
928 * we have to live with the fact that a user can
929 * authorize itself as any ID that is allowed
930 * by the authzTo directive of the "proxyauthzdn".
933 * NOTE: current Proxy Authorization specification
934 * and implementation do not allow proxy authorization
935 * control to be provided with Bind requests
938 * if no bind took place yet, but the connection is bound
939 * and the "proxyauthzdn" is set, then bind as
940 * "proxyauthzdn" and explicitly add the proxyAuthz
941 * control to every operation with the dn bound
942 * to the connection as control value.
945 /* bind as proxyauthzdn only if no idassert mode
946 * is requested, or if the client's identity
948 switch ( li->idassert_mode ) {
949 case LDAP_BACK_IDASSERT_LEGACY:
950 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
951 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
953 binddn = li->idassert_authcDN;
954 bindcred = li->idassert_passwd;
961 /* NOTE: rootdn can always idassert */
962 if ( li->idassert_authz && !be_isroot( op ) ) {
963 struct berval authcDN;
965 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
966 authcDN = slap_empty_bv;
969 authcDN = op->o_conn->c_ndn;
971 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
972 &authcDN, &authcDN );
973 if ( rs->sr_err != LDAP_SUCCESS ) {
974 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
975 send_ldap_result( op, rs );
979 rs->sr_err = LDAP_SUCCESS;
980 binddn = slap_empty_bv;
981 bindcred = slap_empty_bv;
989 binddn = li->idassert_authcDN;
990 bindcred = li->idassert_passwd;
995 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
996 #ifdef HAVE_CYRUS_SASL
997 void *defaults = NULL;
998 struct berval authzID = BER_BVNULL;
1001 /* if SASL supports native authz, prepare for it */
1002 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1003 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1005 switch ( li->idassert_mode ) {
1006 case LDAP_BACK_IDASSERT_OTHERID:
1007 case LDAP_BACK_IDASSERT_OTHERDN:
1008 authzID = li->idassert_authzID;
1011 case LDAP_BACK_IDASSERT_ANONYMOUS:
1012 BER_BVSTR( &authzID, "dn:" );
1015 case LDAP_BACK_IDASSERT_SELF:
1016 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1017 /* connection is not authc'd, so don't idassert */
1018 BER_BVSTR( &authzID, "dn:" );
1021 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
1022 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1023 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1024 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1025 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
1034 #if 0 /* will deal with this later... */
1035 if ( sasl_secprops != NULL ) {
1036 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
1037 (void *) sasl_secprops );
1039 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1040 send_ldap_result( op, rs );
1047 defaults = lutil_sasl_defaults( lc->lc_ld,
1048 li->idassert_sasl_mech.bv_val,
1049 li->idassert_sasl_realm.bv_val,
1050 li->idassert_authcID.bv_val,
1051 li->idassert_passwd.bv_val,
1054 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
1055 li->idassert_sasl_mech.bv_val, NULL, NULL,
1056 LDAP_SASL_QUIET, lutil_sasl_interact,
1059 lutil_sasl_freedefs( defaults );
1061 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1064 rs->sr_err = slap_map_api2result( rs );
1065 if ( rs->sr_err != LDAP_SUCCESS ) {
1067 send_ldap_result( op, rs );
1073 #endif /* HAVE_CYRUS_SASL */
1076 switch ( li->idassert_authmethod ) {
1077 case LDAP_AUTH_SIMPLE:
1078 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1079 binddn.bv_val, LDAP_SASL_SIMPLE,
1080 &bindcred, NULL, NULL, &msgid );
1083 case LDAP_AUTH_NONE:
1090 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1091 send_ldap_result( op, rs );
1095 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
1096 if ( rc == LDAP_SUCCESS ) {
1100 return lc->lc_bound;
1104 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
1105 * to existing server-side controls if required; if not,
1106 * the existing server-side controls are placed in *pctrls.
1107 * The caller, after using the controls in client API
1108 * operations, if ( *pctrls != op->o_ctrls ), should
1109 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
1110 * The function returns success if the control could
1111 * be added if required, or if it did nothing; in the future,
1112 * it might return some error if it failed.
1114 * if no bind took place yet, but the connection is bound
1115 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
1116 * and explicitly add proxyAuthz the control to every operation
1117 * with the dn bound to the connection as control value.
1119 * If no server-side controls are defined for the operation,
1120 * simply add the proxyAuthz control; otherwise, if the
1121 * proxyAuthz control is not already set, add it as
1124 * FIXME: is controls order significant for security?
1125 * ANSWER: controls ordering and interoperability
1126 * must be indicated by the specs of each control; if none
1127 * is specified, the order is irrelevant.
1130 ldap_back_proxy_authz_ctrl(
1131 struct ldapconn *lc,
1134 LDAPControl ***pctrls )
1136 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
1137 LDAPControl **ctrls = NULL;
1140 struct berval assertedID;
1144 rs->sr_err = LDAP_SUCCESS;
1146 /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
1147 * but if it is not set this test fails. We need a different
1148 * means to detect if idassert is enabled */
1149 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
1150 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) )
1155 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
1159 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
1160 if ( op->o_proxy_authz ) {
1162 * FIXME: we do not want to perform proxyAuthz
1163 * on behalf of the client, because this would
1164 * be performed with "proxyauthzdn" privileges.
1166 * This might actually be too strict, since
1167 * the "proxyauthzdn" authzTo, and each entry's
1168 * authzFrom attributes may be crafted
1169 * to avoid unwanted proxyAuthz to take place.
1172 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1173 rs->sr_text = "proxyAuthz not allowed within namingContext";
1178 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1182 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1186 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
1190 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
1191 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1192 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
1194 /* already asserted in SASL via native authz */
1195 /* NOTE: the test on lc->lc_bound is used to trap
1196 * native authorization of anonymous users,
1197 * since in that case op->o_conn->c_ndn is NULL */
1201 } else if ( li->idassert_authz && !be_isroot( op ) ) {
1203 struct berval authcDN;
1205 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1206 authcDN = slap_empty_bv;
1208 authcDN = op->o_conn->c_ndn;
1210 rc = slap_sasl_matches( op, li->idassert_authz,
1211 &authcDN, & authcDN );
1212 if ( rc != LDAP_SUCCESS ) {
1213 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
1215 /* op->o_conn->c_ndn is not authorized
1216 * to use idassert */
1223 if ( op->o_proxy_authz ) {
1226 * 1) ignore the already set proxyAuthz control
1227 * 2) leave it in place, and don't set ours
1229 * 4) reject the operation
1231 * option (4) is very drastic
1232 * option (3) will make the remote server reject
1233 * the operation, thus being equivalent to (4)
1234 * option (2) will likely break the idassert
1235 * assumptions, so we cannot accept it;
1236 * option (1) means that we are contradicting
1237 * the client's reques.
1239 * I think (4) is the only correct choice.
1241 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1242 rs->sr_text = "proxyAuthz not allowed within namingContext";
1245 if ( op->o_do_not_cache && op->o_is_auth_check ) {
1246 mode = LDAP_BACK_IDASSERT_NOASSERT;
1249 mode = li->idassert_mode;
1253 case LDAP_BACK_IDASSERT_LEGACY:
1254 case LDAP_BACK_IDASSERT_SELF:
1255 /* original behavior:
1256 * assert the client's identity */
1257 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1258 assertedID = slap_empty_bv;
1260 assertedID = op->o_conn->c_ndn;
1264 case LDAP_BACK_IDASSERT_ANONYMOUS:
1265 /* assert "anonymous" */
1266 assertedID = slap_empty_bv;
1269 case LDAP_BACK_IDASSERT_NOASSERT:
1270 /* don't assert; bind as proxyauthzdn */
1273 case LDAP_BACK_IDASSERT_OTHERID:
1274 case LDAP_BACK_IDASSERT_OTHERDN:
1275 /* assert idassert DN */
1276 assertedID = li->idassert_authzID;
1283 if ( BER_BVISNULL( &assertedID ) ) {
1284 assertedID = slap_empty_bv;
1287 if ( op->o_ctrls ) {
1288 for ( i = 0; op->o_ctrls[ i ]; i++ )
1289 /* just count ctrls */ ;
1292 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1293 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1295 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1296 ctrls[ 0 ]->ldctl_iscritical = 1;
1298 switch ( li->idassert_mode ) {
1299 /* already in u:ID or dn:DN form */
1300 case LDAP_BACK_IDASSERT_OTHERID:
1301 case LDAP_BACK_IDASSERT_OTHERDN:
1302 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1305 /* needs the dn: prefix */
1307 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1308 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1309 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1310 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
1311 assertedID.bv_val, assertedID.bv_len + 1 );
1315 if ( op->o_ctrls ) {
1316 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1317 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1320 ctrls[ i + 1 ] = NULL;
1323 if ( ctrls == NULL ) {
1324 ctrls = op->o_ctrls;
1333 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1335 LDAPControl **ctrls = *pctrls;
1337 /* we assume that the first control is the proxyAuthz
1338 * added by back-ldap, so it's the only one we explicitly
1340 if ( ctrls && ctrls != op->o_ctrls ) {
1341 assert( ctrls[ 0 ] != NULL );
1343 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1344 free( ctrls[ 0 ]->ldctl_value.bv_val );