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;
239 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
240 case LDAP_PVT_THREAD_EBUSY:
242 ldap_pvt_thread_yield();
249 assert( lc->lc_refcnt > 0 );
250 if ( --lc->lc_refcnt == 0 ) {
251 lc = avl_delete( &li->conntree, (caddr_t)lc,
252 ldap_back_conn_cmp );
253 assert( lc != NULL );
255 ldap_back_conn_free( (void *)lc );
258 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
264 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
266 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
267 int vers = op->o_protocol;
270 assert( lcp != NULL );
272 rs->sr_err = ldap_initialize( &ld, li->url );
273 if ( rs->sr_err != LDAP_SUCCESS ) {
277 /* Set LDAP version. This will always succeed: If the client
278 * bound with a particular version, then so can we.
280 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&vers );
282 /* automatically chase referrals ("[dont-]chase-referrals" statement) */
283 if ( LDAP_BACK_CHASE_REFERRALS( li ) ) {
284 ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
288 /* start TLS ("tls-[try-]{start,propagate}" statements) */
289 if ( ( LDAP_BACK_USE_TLS( li ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( li ) ) )
290 && !ldap_is_ldaps_url( li->url ) )
292 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
294 * use asynchronous StartTLS
295 * in case, chase referral (not implemented yet)
299 rs->sr_err = ldap_start_tls( ld, NULL, NULL, &msgid );
300 if ( rs->sr_err == LDAP_SUCCESS ) {
301 LDAPMessage *res = NULL;
303 struct timeval tv = { 0, 0 };
306 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
308 rs->sr_err = LDAP_OTHER;
310 } else if ( rc == 0 ) {
317 rs->sr_err = LDAP_OTHER;
319 } else if ( rc == LDAP_RES_EXTENDED ) {
320 struct berval *data = NULL;
322 rs->sr_err = ldap_parse_extended_result( ld, res,
324 if ( rs->sr_err == LDAP_SUCCESS ) {
325 rs->sr_err = ldap_result2error( ld, res, 1 );
328 /* FIXME: in case a referral
329 * is returned, should we try
330 * using it instead of the
332 if ( rs->sr_err == LDAP_SUCCESS ) {
333 ldap_install_tls( ld );
335 } else if ( rs->sr_err == LDAP_REFERRAL ) {
336 rs->sr_err = LDAP_OTHER;
337 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
341 if ( data->bv_val ) {
342 ber_memfree( data->bv_val );
349 rs->sr_err = LDAP_OTHER;
356 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
358 * use synchronous StartTLS
360 rs->sr_err = ldap_start_tls_s( ld, NULL, NULL );
361 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
363 /* if StartTLS is requested, only attempt it if the URL
364 * is not "ldaps://"; this may occur not only in case
365 * of misconfiguration, but also when used in the chain
366 * overlay, where the "uri" can be parsed out of a referral */
367 if ( rs->sr_err == LDAP_SERVER_DOWN
368 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( li ) ) )
370 ldap_unbind_ext_s( ld, NULL, NULL );
374 /* in case Start TLS is not critical */
375 rs->sr_err = LDAP_SUCCESS;
377 #endif /* HAVE_TLS */
379 if ( *lcp == NULL ) {
380 *lcp = (struct ldapconn *)ch_calloc( 1, sizeof( struct ldapconn ) );
383 (*lcp)->lc_refcnt = 1;
386 if ( rs->sr_err != LDAP_SUCCESS ) {
387 rs->sr_err = slap_map_api2result( rs );
388 if ( sendok & LDAP_BACK_SENDERR ) {
389 if ( rs->sr_text == NULL ) {
390 rs->sr_text = "ldap_initialize() failed";
392 send_ldap_result( op, rs );
401 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
403 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
404 struct ldapconn *lc, lc_curr = { 0 };
407 /* Searches for a ldapconn in the avl tree */
409 /* Explicit binds must not be shared */
410 if ( op->o_tag == LDAP_REQ_BIND
412 && op->o_conn->c_authz_backend
413 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private ) )
415 lc_curr.lc_conn = op->o_conn;
418 lc_curr.lc_conn = NULL;
421 /* Internal searches are privileged and shared. So is root. */
422 /* FIXME: there seem to be concurrency issues */
423 if ( op->o_do_not_cache || be_isroot( op ) ) {
424 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
425 lc_curr.lc_conn = NULL;
426 lc_curr.lc_ispriv = 1;
429 lc_curr.lc_local_ndn = op->o_ndn;
433 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
434 case LDAP_PVT_THREAD_EBUSY:
436 ldap_pvt_thread_yield();
443 lc = (struct ldapconn *)avl_find( li->conntree,
444 (caddr_t)&lc_curr, ldap_back_conn_cmp );
446 refcnt = ++lc->lc_refcnt;
448 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
450 /* Looks like we didn't get a bind. Open a new session... */
452 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
456 lc->lc_conn = lc_curr.lc_conn;
457 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
459 ldap_pvt_thread_mutex_init( &lc->lc_mutex );
461 if ( lc_curr.lc_ispriv ) {
462 ber_dupbv( &lc->lc_cred, &li->acl_passwd );
463 ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
464 lc->lc_ispriv = lc_curr.lc_ispriv;
467 BER_BVZERO( &lc->lc_cred );
468 BER_BVZERO( &lc->lc_bound_ndn );
469 if ( op->o_conn && !BER_BVISEMPTY( &op->o_ndn )
470 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private )
472 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
478 /* Inserts the newly created ldapconn in the avl tree */
480 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
481 case LDAP_PVT_THREAD_EBUSY:
483 ldap_pvt_thread_yield();
490 assert( lc->lc_refcnt == 1 );
491 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
492 ldap_back_conn_cmp, ldap_back_conn_dup );
494 #if PRINT_CONNTREE > 0
495 myprint( li->conntree );
496 #endif /* PRINT_CONNTREE */
498 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
500 Debug( LDAP_DEBUG_TRACE,
501 "=>ldap_back_getconn: conn %p inserted (refcnt=%u)\n",
502 (void *)lc, refcnt, 0 );
504 /* Err could be -1 in case a duplicate ldapconn is inserted */
505 if ( rs->sr_err != 0 ) {
506 ldap_back_conn_free( lc );
507 rs->sr_err = LDAP_OTHER;
508 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
509 send_ldap_error( op, rs, LDAP_OTHER,
510 "internal server error" );
516 Debug( LDAP_DEBUG_TRACE,
517 "=>ldap_back_getconn: conn %p fetched (refcnt=%u)\n",
518 (void *)lc, refcnt, 0 );
525 ldap_back_release_conn(
528 struct ldapconn *lc )
530 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
533 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
534 case LDAP_PVT_THREAD_EBUSY:
536 ldap_pvt_thread_yield();
543 assert( lc->lc_refcnt > 0 );
545 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
551 * Note: as the check for the value of lc->lc_bound was already here, I removed
552 * it from all the callers, and I made the function return the flag, so
553 * it can be used to simplify the check.
555 * Note: lc_mutex is locked; dolock indicates whether li->conn_mutex
556 * must be locked or not
559 ldap_back_dobind_int(
563 ldap_back_send_t sendok,
570 assert( retries >= 0 );
572 if ( !lc->lc_bound ) {
573 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
576 * FIXME: we need to let clients use proxyAuthz
577 * otherwise we cannot do symmetric pools of servers;
578 * we have to live with the fact that a user can
579 * authorize itself as any ID that is allowed
580 * by the authzTo directive of the "proxyauthzdn".
583 * NOTE: current Proxy Authorization specification
584 * and implementation do not allow proxy authorization
585 * control to be provided with Bind requests
588 * if no bind took place yet, but the connection is bound
589 * and the "idassert-authcDN" (or other ID) is set,
590 * then bind as the asserting identity and explicitly
591 * add the proxyAuthz control to every operation with the
592 * dn bound to the connection as control value.
593 * This is done also if this is the authrizing backend,
594 * but the "override" flag is given to idassert.
595 * It allows to use SASL bind and yet proxyAuthz users
597 if ( op->o_conn != NULL &&
598 !op->o_do_not_cache &&
599 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
600 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
602 (void)ldap_back_proxy_authz_bind( lc, op, rs );
606 #ifdef HAVE_CYRUS_SASL
607 if ( lc->lc_ispriv && li->acl_authmethod == LDAP_AUTH_SASL ) {
608 void *defaults = NULL;
610 #if 1 /* will deal with this later... */
611 if ( li->acl_secprops != NULL ) {
612 rc = ldap_set_option( lc->lc_ld,
613 LDAP_OPT_X_SASL_SECPROPS, li->acl_secprops);
615 if( rc != LDAP_OPT_SUCCESS ) {
616 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
617 "(%s,SECPROPS,\"%s\") failed!\n",
618 li->url, li->acl_secprops, 0 );
624 defaults = lutil_sasl_defaults( lc->lc_ld,
625 li->acl_sasl_mech.bv_val,
626 li->acl_sasl_realm.bv_val,
627 li->acl_authcID.bv_val,
628 li->acl_passwd.bv_val,
631 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
632 li->acl_authcDN.bv_val,
633 li->acl_sasl_mech.bv_val, NULL, NULL,
634 LDAP_SASL_QUIET, lutil_sasl_interact,
637 lutil_sasl_freedefs( defaults );
639 rs->sr_err = slap_map_api2result( rs );
640 if ( rs->sr_err != LDAP_SUCCESS ) {
642 send_ldap_result( op, rs );
649 #endif /* HAVE_CYRUS_SASL */
652 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
653 lc->lc_bound_ndn.bv_val,
654 LDAP_SASL_SIMPLE, &lc->lc_cred,
655 NULL, NULL, &msgid );
657 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
661 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
662 case LDAP_PVT_THREAD_EBUSY:
664 ldap_pvt_thread_yield();
672 assert( lc->lc_refcnt > 0 );
673 if ( lc->lc_refcnt == 1 ) {
674 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
677 /* lc here must be the regular lc, reset and ready for init */
678 rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
681 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
683 if ( rs->sr_err == LDAP_SUCCESS ) {
689 ldap_back_freeconn( op, lc );
690 rs->sr_err = slap_map_api2result( rs );
695 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
696 if ( rc == LDAP_SUCCESS ) {
707 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
711 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
712 rc = ldap_back_dobind_int( lc, op, rs, sendok, 1, 1 );
713 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
721 * This is a callback used for chasing referrals using the same
722 * credentials as the original user on this session.
725 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
726 ber_int_t msgid, void *params )
728 struct ldapconn *lc = (struct ldapconn *)params;
730 /* FIXME: add checks on the URL/identity? */
732 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
733 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
742 ldap_back_send_t sendok )
745 LDAPMessage *res = NULL;
748 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
751 rs->sr_matched = NULL;
753 /* if the error recorded in the reply corresponds
754 * to a successful state, get the error from the
755 * remote server response */
756 if ( ERR_OK( rs->sr_err ) ) {
758 struct timeval tv = { 0, 0 };
761 /* if result parsing fails, note the failure reason */
762 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
765 tv.tv_usec = 100000; /* 0.1 s */
766 ldap_pvt_thread_yield();
770 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
775 /* otherwise get the result; if it is not
776 * LDAP_SUCCESS, record it in the reply
777 * structure (this includes
778 * LDAP_COMPARE_{TRUE|FALSE}) */
780 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
781 &match, &text, NULL, NULL, 1 );
783 if ( rc != LDAP_SUCCESS ) {
789 /* if the error in the reply structure is not
790 * LDAP_SUCCESS, try to map it from client
792 if ( !ERR_OK( rs->sr_err ) ) {
793 rs->sr_err = slap_map_api2result( rs );
795 /* internal ops ( op->o_conn == NULL )
796 * must not reply to client */
797 if ( op->o_conn && !op->o_do_not_cache && match ) {
799 /* record the (massaged) matched
800 * DN into the reply structure */
801 rs->sr_matched = match;
805 ( ( sendok & LDAP_BACK_SENDOK )
806 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
808 send_ldap_result( op, rs );
811 if ( rs->sr_matched != match ) {
812 free( (char *)rs->sr_matched );
814 rs->sr_matched = NULL;
815 ldap_memfree( match );
818 ldap_memfree( text );
821 return( ERR_OK( rs->sr_err ) ? 0 : -1 );
824 /* return true if bound, false if failed */
826 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
829 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
832 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
833 case LDAP_PVT_THREAD_EBUSY:
835 ldap_pvt_thread_yield();
842 if ( lc->lc_refcnt == 1 ) {
843 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
847 /* lc here must be the regular lc, reset and ready for init */
848 rc = ldap_back_prepare_conn( &lc, op, rs, sendok );
849 if ( rc == LDAP_SUCCESS ) {
850 rc = ldap_back_dobind_int( lc, op, rs, sendok, 0, 0 );
854 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
860 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
862 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
863 struct berval binddn = slap_empty_bv;
864 struct berval bindcred = slap_empty_bv;
870 * FIXME: we need to let clients use proxyAuthz
871 * otherwise we cannot do symmetric pools of servers;
872 * we have to live with the fact that a user can
873 * authorize itself as any ID that is allowed
874 * by the authzTo directive of the "proxyauthzdn".
877 * NOTE: current Proxy Authorization specification
878 * and implementation do not allow proxy authorization
879 * control to be provided with Bind requests
882 * if no bind took place yet, but the connection is bound
883 * and the "proxyauthzdn" is set, then bind as
884 * "proxyauthzdn" and explicitly add the proxyAuthz
885 * control to every operation with the dn bound
886 * to the connection as control value.
889 /* bind as proxyauthzdn only if no idassert mode
890 * is requested, or if the client's identity
892 switch ( li->idassert_mode ) {
893 case LDAP_BACK_IDASSERT_LEGACY:
894 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
895 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
897 binddn = li->idassert_authcDN;
898 bindcred = li->idassert_passwd;
905 /* NOTE: rootdn can always idassert */
906 if ( li->idassert_authz && !be_isroot( op ) ) {
907 struct berval authcDN;
909 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
910 authcDN = slap_empty_bv;
913 authcDN = op->o_conn->c_ndn;
915 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
916 &authcDN, &authcDN );
917 if ( rs->sr_err != LDAP_SUCCESS ) {
918 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
919 send_ldap_result( op, rs );
923 rs->sr_err = LDAP_SUCCESS;
924 binddn = slap_empty_bv;
925 bindcred = slap_empty_bv;
933 binddn = li->idassert_authcDN;
934 bindcred = li->idassert_passwd;
939 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
940 #ifdef HAVE_CYRUS_SASL
941 void *defaults = NULL;
942 struct berval authzID = BER_BVNULL;
945 /* if SASL supports native authz, prepare for it */
946 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
947 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
949 switch ( li->idassert_mode ) {
950 case LDAP_BACK_IDASSERT_OTHERID:
951 case LDAP_BACK_IDASSERT_OTHERDN:
952 authzID = li->idassert_authzID;
955 case LDAP_BACK_IDASSERT_ANONYMOUS:
956 BER_BVSTR( &authzID, "dn:" );
959 case LDAP_BACK_IDASSERT_SELF:
960 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
961 /* connection is not authc'd, so don't idassert */
962 BER_BVSTR( &authzID, "dn:" );
965 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
966 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
967 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
968 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
969 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
978 #if 0 /* will deal with this later... */
979 if ( sasl_secprops != NULL ) {
980 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
981 (void *) sasl_secprops );
983 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
984 send_ldap_result( op, rs );
991 defaults = lutil_sasl_defaults( lc->lc_ld,
992 li->idassert_sasl_mech.bv_val,
993 li->idassert_sasl_realm.bv_val,
994 li->idassert_authcID.bv_val,
995 li->idassert_passwd.bv_val,
998 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
999 li->idassert_sasl_mech.bv_val, NULL, NULL,
1000 LDAP_SASL_QUIET, lutil_sasl_interact,
1003 lutil_sasl_freedefs( defaults );
1005 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1008 rs->sr_err = slap_map_api2result( rs );
1009 if ( rs->sr_err != LDAP_SUCCESS ) {
1011 send_ldap_result( op, rs );
1017 #endif /* HAVE_CYRUS_SASL */
1020 switch ( li->idassert_authmethod ) {
1021 case LDAP_AUTH_SIMPLE:
1022 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1023 binddn.bv_val, LDAP_SASL_SIMPLE,
1024 &bindcred, NULL, NULL, &msgid );
1027 case LDAP_AUTH_NONE:
1034 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1035 send_ldap_result( op, rs );
1039 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
1040 if ( rc == LDAP_SUCCESS ) {
1044 return lc->lc_bound;
1048 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
1049 * to existing server-side controls if required; if not,
1050 * the existing server-side controls are placed in *pctrls.
1051 * The caller, after using the controls in client API
1052 * operations, if ( *pctrls != op->o_ctrls ), should
1053 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
1054 * The function returns success if the control could
1055 * be added if required, or if it did nothing; in the future,
1056 * it might return some error if it failed.
1058 * if no bind took place yet, but the connection is bound
1059 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
1060 * and explicitly add proxyAuthz the control to every operation
1061 * with the dn bound to the connection as control value.
1063 * If no server-side controls are defined for the operation,
1064 * simply add the proxyAuthz control; otherwise, if the
1065 * proxyAuthz control is not already set, add it as
1068 * FIXME: is controls order significant for security?
1069 * ANSWER: controls ordering and interoperability
1070 * must be indicated by the specs of each control; if none
1071 * is specified, the order is irrelevant.
1074 ldap_back_proxy_authz_ctrl(
1075 struct ldapconn *lc,
1078 LDAPControl ***pctrls )
1080 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
1081 LDAPControl **ctrls = NULL;
1084 struct berval assertedID;
1088 rs->sr_err = LDAP_SUCCESS;
1090 /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
1091 * but if it is not set this test fails. We need a different
1092 * means to detect if idassert is enabled */
1093 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
1094 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) )
1099 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
1103 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
1104 if ( op->o_proxy_authz ) {
1106 * FIXME: we do not want to perform proxyAuthz
1107 * on behalf of the client, because this would
1108 * be performed with "proxyauthzdn" privileges.
1110 * This might actually be too strict, since
1111 * the "proxyauthzdn" authzTo, and each entry's
1112 * authzFrom attributes may be crafted
1113 * to avoid unwanted proxyAuthz to take place.
1116 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1117 rs->sr_text = "proxyAuthz not allowed within namingContext";
1122 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1126 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1130 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
1134 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
1135 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1136 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
1138 /* already asserted in SASL via native authz */
1139 /* NOTE: the test on lc->lc_bound is used to trap
1140 * native authorization of anonymous users,
1141 * since in that case op->o_conn->c_ndn is NULL */
1145 } else if ( li->idassert_authz && !be_isroot( op ) ) {
1147 struct berval authcDN;
1149 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1150 authcDN = slap_empty_bv;
1152 authcDN = op->o_conn->c_ndn;
1154 rc = slap_sasl_matches( op, li->idassert_authz,
1155 &authcDN, & authcDN );
1156 if ( rc != LDAP_SUCCESS ) {
1157 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
1159 /* op->o_conn->c_ndn is not authorized
1160 * to use idassert */
1167 if ( op->o_proxy_authz ) {
1170 * 1) ignore the already set proxyAuthz control
1171 * 2) leave it in place, and don't set ours
1173 * 4) reject the operation
1175 * option (4) is very drastic
1176 * option (3) will make the remote server reject
1177 * the operation, thus being equivalent to (4)
1178 * option (2) will likely break the idassert
1179 * assumptions, so we cannot accept it;
1180 * option (1) means that we are contradicting
1181 * the client's reques.
1183 * I think (4) is the only correct choice.
1185 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1186 rs->sr_text = "proxyAuthz not allowed within namingContext";
1189 if ( op->o_do_not_cache && op->o_is_auth_check ) {
1190 mode = LDAP_BACK_IDASSERT_NOASSERT;
1193 mode = li->idassert_mode;
1197 case LDAP_BACK_IDASSERT_LEGACY:
1198 case LDAP_BACK_IDASSERT_SELF:
1199 /* original behavior:
1200 * assert the client's identity */
1201 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1202 assertedID = slap_empty_bv;
1204 assertedID = op->o_conn->c_ndn;
1208 case LDAP_BACK_IDASSERT_ANONYMOUS:
1209 /* assert "anonymous" */
1210 assertedID = slap_empty_bv;
1213 case LDAP_BACK_IDASSERT_NOASSERT:
1214 /* don't assert; bind as proxyauthzdn */
1217 case LDAP_BACK_IDASSERT_OTHERID:
1218 case LDAP_BACK_IDASSERT_OTHERDN:
1219 /* assert idassert DN */
1220 assertedID = li->idassert_authzID;
1227 if ( BER_BVISNULL( &assertedID ) ) {
1228 assertedID = slap_empty_bv;
1231 if ( op->o_ctrls ) {
1232 for ( i = 0; op->o_ctrls[ i ]; i++ )
1233 /* just count ctrls */ ;
1236 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1237 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1239 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1240 ctrls[ 0 ]->ldctl_iscritical = 1;
1242 switch ( li->idassert_mode ) {
1243 /* already in u:ID or dn:DN form */
1244 case LDAP_BACK_IDASSERT_OTHERID:
1245 case LDAP_BACK_IDASSERT_OTHERDN:
1246 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1249 /* needs the dn: prefix */
1251 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1252 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1253 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1254 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
1255 assertedID.bv_val, assertedID.bv_len + 1 );
1259 if ( op->o_ctrls ) {
1260 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1261 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1264 ctrls[ i + 1 ] = NULL;
1267 if ( ctrls == NULL ) {
1268 ctrls = op->o_ctrls;
1277 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1279 LDAPControl **ctrls = *pctrls;
1281 /* we assume that the first control is the proxyAuthz
1282 * added by back-ldap, so it's the only one we explicitly
1284 if ( ctrls && ctrls != op->o_ctrls ) {
1285 assert( ctrls[ 0 ] != NULL );
1287 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1288 free( ctrls[ 0 ]->ldctl_value.bv_val );