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( 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;
408 /* Searches for a ldapconn in the avl tree */
410 /* Explicit binds must not be shared */
411 if ( op->o_tag == LDAP_REQ_BIND
413 && op->o_conn->c_authz_backend
414 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private ) )
416 lc_curr.lc_conn = op->o_conn;
419 lc_curr.lc_conn = NULL;
422 /* Internal searches are privileged and shared. So is root. */
423 /* FIXME: there seem to be concurrency issues */
424 if ( op->o_do_not_cache || be_isroot( op ) ) {
425 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
426 lc_curr.lc_conn = NULL;
427 lc_curr.lc_ispriv = 1;
430 lc_curr.lc_local_ndn = op->o_ndn;
434 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
435 case LDAP_PVT_THREAD_EBUSY:
437 ldap_pvt_thread_yield();
444 lc = (struct ldapconn *)avl_find( li->conntree,
445 (caddr_t)&lc_curr, ldap_back_conn_cmp );
447 refcnt = ++lc->lc_refcnt;
449 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
451 /* Looks like we didn't get a bind. Open a new session... */
453 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
457 lc->lc_conn = lc_curr.lc_conn;
458 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
460 ldap_pvt_thread_mutex_init( &lc->lc_mutex );
462 if ( lc_curr.lc_ispriv ) {
463 ber_dupbv( &lc->lc_cred, &li->acl_passwd );
464 ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
465 lc->lc_ispriv = lc_curr.lc_ispriv;
468 BER_BVZERO( &lc->lc_cred );
469 BER_BVZERO( &lc->lc_bound_ndn );
470 if ( op->o_conn && !BER_BVISEMPTY( &op->o_ndn )
471 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private )
473 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
479 /* Inserts the newly created ldapconn in the avl tree */
481 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
482 case LDAP_PVT_THREAD_EBUSY:
484 ldap_pvt_thread_yield();
491 assert( lc->lc_refcnt == 1 );
492 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
493 ldap_back_conn_cmp, ldap_back_conn_dup );
495 #if PRINT_CONNTREE > 0
496 myprint( li->conntree );
497 #endif /* PRINT_CONNTREE */
499 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
501 Debug( LDAP_DEBUG_TRACE,
502 "=>ldap_back_getconn: conn %p inserted (refcnt=%u)\n",
503 (void *)lc, refcnt, 0 );
505 /* Err could be -1 in case a duplicate ldapconn is inserted */
506 if ( rs->sr_err != 0 ) {
507 ldap_back_conn_free( lc );
508 rs->sr_err = LDAP_OTHER;
509 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
510 send_ldap_error( op, rs, LDAP_OTHER,
511 "internal server error" );
517 Debug( LDAP_DEBUG_TRACE,
518 "=>ldap_back_getconn: conn %p fetched (refcnt=%u)\n",
519 (void *)lc, refcnt, 0 );
526 ldap_back_release_conn(
529 struct ldapconn *lc )
531 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
534 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
535 case LDAP_PVT_THREAD_EBUSY:
537 ldap_pvt_thread_yield();
544 assert( lc->lc_refcnt > 0 );
546 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
552 * Note: as the check for the value of lc->lc_bound was already here, I removed
553 * it from all the callers, and I made the function return the flag, so
554 * it can be used to simplify the check.
556 * Note: lc_mutex is locked; dolock indicates whether li->conn_mutex
557 * must be locked or not
560 ldap_back_dobind_int(
564 ldap_back_send_t sendok,
571 assert( retries >= 0 );
573 if ( !lc->lc_bound ) {
574 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
577 * FIXME: we need to let clients use proxyAuthz
578 * otherwise we cannot do symmetric pools of servers;
579 * we have to live with the fact that a user can
580 * authorize itself as any ID that is allowed
581 * by the authzTo directive of the "proxyauthzdn".
584 * NOTE: current Proxy Authorization specification
585 * and implementation do not allow proxy authorization
586 * control to be provided with Bind requests
589 * if no bind took place yet, but the connection is bound
590 * and the "idassert-authcDN" (or other ID) is set,
591 * then bind as the asserting identity and explicitly
592 * add the proxyAuthz control to every operation with the
593 * dn bound to the connection as control value.
594 * This is done also if this is the authrizing backend,
595 * but the "override" flag is given to idassert.
596 * It allows to use SASL bind and yet proxyAuthz users
598 if ( op->o_conn != NULL &&
599 !op->o_do_not_cache &&
600 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
601 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
603 (void)ldap_back_proxy_authz_bind( lc, op, rs );
607 #ifdef HAVE_CYRUS_SASL
608 if ( lc->lc_ispriv && li->acl_authmethod == LDAP_AUTH_SASL ) {
609 void *defaults = NULL;
611 #if 1 /* will deal with this later... */
612 if ( li->acl_secprops != NULL ) {
613 rc = ldap_set_option( lc->lc_ld,
614 LDAP_OPT_X_SASL_SECPROPS, li->acl_secprops);
616 if( rc != LDAP_OPT_SUCCESS ) {
617 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
618 "(%s,SECPROPS,\"%s\") failed!\n",
619 li->url, li->acl_secprops, 0 );
625 defaults = lutil_sasl_defaults( lc->lc_ld,
626 li->acl_sasl_mech.bv_val,
627 li->acl_sasl_realm.bv_val,
628 li->acl_authcID.bv_val,
629 li->acl_passwd.bv_val,
632 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
633 li->acl_authcDN.bv_val,
634 li->acl_sasl_mech.bv_val, NULL, NULL,
635 LDAP_SASL_QUIET, lutil_sasl_interact,
638 lutil_sasl_freedefs( defaults );
640 rs->sr_err = slap_map_api2result( rs );
641 if ( rs->sr_err != LDAP_SUCCESS ) {
643 send_ldap_result( op, rs );
650 #endif /* HAVE_CYRUS_SASL */
653 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
654 lc->lc_bound_ndn.bv_val,
655 LDAP_SASL_SIMPLE, &lc->lc_cred,
656 NULL, NULL, &msgid );
658 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
662 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
663 case LDAP_PVT_THREAD_EBUSY:
665 ldap_pvt_thread_yield();
673 assert( lc->lc_refcnt > 0 );
674 if ( lc->lc_refcnt == 1 ) {
675 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
678 /* lc here must be the regular lc, reset and ready for init */
679 rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
682 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
684 if ( rs->sr_err == LDAP_SUCCESS ) {
690 ldap_back_freeconn( op, lc );
691 rs->sr_err = slap_map_api2result( rs );
696 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
697 if ( rc == LDAP_SUCCESS ) {
708 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
712 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
713 rc = ldap_back_dobind_int( lc, op, rs, sendok, 1, 1 );
714 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
722 * This is a callback used for chasing referrals using the same
723 * credentials as the original user on this session.
726 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
727 ber_int_t msgid, void *params )
729 struct ldapconn *lc = (struct ldapconn *)params;
731 /* FIXME: add checks on the URL/identity? */
733 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
734 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
743 ldap_back_send_t sendok )
746 LDAPMessage *res = NULL;
749 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
752 rs->sr_matched = NULL;
754 /* if the error recorded in the reply corresponds
755 * to a successful state, get the error from the
756 * remote server response */
757 if ( ERR_OK( rs->sr_err ) ) {
759 struct timeval tv = { 0, 0 };
762 /* if result parsing fails, note the failure reason */
763 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
766 tv.tv_usec = 100000; /* 0.1 s */
767 ldap_pvt_thread_yield();
771 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
776 /* otherwise get the result; if it is not
777 * LDAP_SUCCESS, record it in the reply
778 * structure (this includes
779 * LDAP_COMPARE_{TRUE|FALSE}) */
781 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
782 &match, &text, NULL, NULL, 1 );
784 if ( rc != LDAP_SUCCESS ) {
790 /* if the error in the reply structure is not
791 * LDAP_SUCCESS, try to map it from client
793 if ( !ERR_OK( rs->sr_err ) ) {
794 rs->sr_err = slap_map_api2result( rs );
796 /* internal ops ( op->o_conn == NULL )
797 * must not reply to client */
798 if ( op->o_conn && !op->o_do_not_cache && match ) {
800 /* record the (massaged) matched
801 * DN into the reply structure */
802 rs->sr_matched = match;
806 ( ( sendok & LDAP_BACK_SENDOK )
807 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
809 send_ldap_result( op, rs );
812 if ( rs->sr_matched != match ) {
813 free( (char *)rs->sr_matched );
815 rs->sr_matched = NULL;
816 ldap_memfree( match );
819 ldap_memfree( text );
822 return( ERR_OK( rs->sr_err ) ? 0 : -1 );
825 /* return true if bound, false if failed */
827 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
830 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
833 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
834 case LDAP_PVT_THREAD_EBUSY:
836 ldap_pvt_thread_yield();
843 if ( lc->lc_refcnt == 1 ) {
844 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
848 /* lc here must be the regular lc, reset and ready for init */
849 rc = ldap_back_prepare_conn( &lc, op, rs, sendok );
850 if ( rc == LDAP_SUCCESS ) {
851 rc = ldap_back_dobind_int( lc, op, rs, sendok, 0, 0 );
855 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
861 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
863 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
864 struct berval binddn = slap_empty_bv;
865 struct berval bindcred = slap_empty_bv;
871 * FIXME: we need to let clients use proxyAuthz
872 * otherwise we cannot do symmetric pools of servers;
873 * we have to live with the fact that a user can
874 * authorize itself as any ID that is allowed
875 * by the authzTo directive of the "proxyauthzdn".
878 * NOTE: current Proxy Authorization specification
879 * and implementation do not allow proxy authorization
880 * control to be provided with Bind requests
883 * if no bind took place yet, but the connection is bound
884 * and the "proxyauthzdn" is set, then bind as
885 * "proxyauthzdn" and explicitly add the proxyAuthz
886 * control to every operation with the dn bound
887 * to the connection as control value.
890 /* bind as proxyauthzdn only if no idassert mode
891 * is requested, or if the client's identity
893 switch ( li->idassert_mode ) {
894 case LDAP_BACK_IDASSERT_LEGACY:
895 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
896 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
898 binddn = li->idassert_authcDN;
899 bindcred = li->idassert_passwd;
906 /* NOTE: rootdn can always idassert */
907 if ( li->idassert_authz && !be_isroot( op ) ) {
908 struct berval authcDN;
910 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
911 authcDN = slap_empty_bv;
914 authcDN = op->o_conn->c_ndn;
916 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
917 &authcDN, &authcDN );
918 if ( rs->sr_err != LDAP_SUCCESS ) {
919 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
920 send_ldap_result( op, rs );
924 rs->sr_err = LDAP_SUCCESS;
925 binddn = slap_empty_bv;
926 bindcred = slap_empty_bv;
934 binddn = li->idassert_authcDN;
935 bindcred = li->idassert_passwd;
940 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
941 #ifdef HAVE_CYRUS_SASL
942 void *defaults = NULL;
943 struct berval authzID = BER_BVNULL;
946 /* if SASL supports native authz, prepare for it */
947 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
948 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
950 switch ( li->idassert_mode ) {
951 case LDAP_BACK_IDASSERT_OTHERID:
952 case LDAP_BACK_IDASSERT_OTHERDN:
953 authzID = li->idassert_authzID;
956 case LDAP_BACK_IDASSERT_ANONYMOUS:
957 BER_BVSTR( &authzID, "dn:" );
960 case LDAP_BACK_IDASSERT_SELF:
961 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
962 /* connection is not authc'd, so don't idassert */
963 BER_BVSTR( &authzID, "dn:" );
966 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
967 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
968 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
969 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
970 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
979 #if 0 /* will deal with this later... */
980 if ( sasl_secprops != NULL ) {
981 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
982 (void *) sasl_secprops );
984 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
985 send_ldap_result( op, rs );
992 defaults = lutil_sasl_defaults( lc->lc_ld,
993 li->idassert_sasl_mech.bv_val,
994 li->idassert_sasl_realm.bv_val,
995 li->idassert_authcID.bv_val,
996 li->idassert_passwd.bv_val,
999 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
1000 li->idassert_sasl_mech.bv_val, NULL, NULL,
1001 LDAP_SASL_QUIET, lutil_sasl_interact,
1004 lutil_sasl_freedefs( defaults );
1006 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1009 rs->sr_err = slap_map_api2result( rs );
1010 if ( rs->sr_err != LDAP_SUCCESS ) {
1012 send_ldap_result( op, rs );
1018 #endif /* HAVE_CYRUS_SASL */
1021 switch ( li->idassert_authmethod ) {
1022 case LDAP_AUTH_SIMPLE:
1023 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1024 binddn.bv_val, LDAP_SASL_SIMPLE,
1025 &bindcred, NULL, NULL, &msgid );
1028 case LDAP_AUTH_NONE:
1035 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1036 send_ldap_result( op, rs );
1040 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
1041 if ( rc == LDAP_SUCCESS ) {
1045 return lc->lc_bound;
1049 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
1050 * to existing server-side controls if required; if not,
1051 * the existing server-side controls are placed in *pctrls.
1052 * The caller, after using the controls in client API
1053 * operations, if ( *pctrls != op->o_ctrls ), should
1054 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
1055 * The function returns success if the control could
1056 * be added if required, or if it did nothing; in the future,
1057 * it might return some error if it failed.
1059 * if no bind took place yet, but the connection is bound
1060 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
1061 * and explicitly add proxyAuthz the control to every operation
1062 * with the dn bound to the connection as control value.
1064 * If no server-side controls are defined for the operation,
1065 * simply add the proxyAuthz control; otherwise, if the
1066 * proxyAuthz control is not already set, add it as
1069 * FIXME: is controls order significant for security?
1070 * ANSWER: controls ordering and interoperability
1071 * must be indicated by the specs of each control; if none
1072 * is specified, the order is irrelevant.
1075 ldap_back_proxy_authz_ctrl(
1076 struct ldapconn *lc,
1079 LDAPControl ***pctrls )
1081 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
1082 LDAPControl **ctrls = NULL;
1085 struct berval assertedID;
1089 rs->sr_err = LDAP_SUCCESS;
1091 /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
1092 * but if it is not set this test fails. We need a different
1093 * means to detect if idassert is enabled */
1094 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
1095 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) )
1100 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
1104 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
1105 if ( op->o_proxy_authz ) {
1107 * FIXME: we do not want to perform proxyAuthz
1108 * on behalf of the client, because this would
1109 * be performed with "proxyauthzdn" privileges.
1111 * This might actually be too strict, since
1112 * the "proxyauthzdn" authzTo, and each entry's
1113 * authzFrom attributes may be crafted
1114 * to avoid unwanted proxyAuthz to take place.
1117 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1118 rs->sr_text = "proxyAuthz not allowed within namingContext";
1123 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1127 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1131 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
1135 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
1136 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1137 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
1139 /* already asserted in SASL via native authz */
1140 /* NOTE: the test on lc->lc_bound is used to trap
1141 * native authorization of anonymous users,
1142 * since in that case op->o_conn->c_ndn is NULL */
1146 } else if ( li->idassert_authz && !be_isroot( op ) ) {
1148 struct berval authcDN;
1150 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1151 authcDN = slap_empty_bv;
1153 authcDN = op->o_conn->c_ndn;
1155 rc = slap_sasl_matches( op, li->idassert_authz,
1156 &authcDN, & authcDN );
1157 if ( rc != LDAP_SUCCESS ) {
1158 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
1160 /* op->o_conn->c_ndn is not authorized
1161 * to use idassert */
1168 if ( op->o_proxy_authz ) {
1171 * 1) ignore the already set proxyAuthz control
1172 * 2) leave it in place, and don't set ours
1174 * 4) reject the operation
1176 * option (4) is very drastic
1177 * option (3) will make the remote server reject
1178 * the operation, thus being equivalent to (4)
1179 * option (2) will likely break the idassert
1180 * assumptions, so we cannot accept it;
1181 * option (1) means that we are contradicting
1182 * the client's reques.
1184 * I think (4) is the only correct choice.
1186 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1187 rs->sr_text = "proxyAuthz not allowed within namingContext";
1190 if ( op->o_do_not_cache && op->o_is_auth_check ) {
1191 mode = LDAP_BACK_IDASSERT_NOASSERT;
1194 mode = li->idassert_mode;
1198 case LDAP_BACK_IDASSERT_LEGACY:
1199 case LDAP_BACK_IDASSERT_SELF:
1200 /* original behavior:
1201 * assert the client's identity */
1202 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1203 assertedID = slap_empty_bv;
1205 assertedID = op->o_conn->c_ndn;
1209 case LDAP_BACK_IDASSERT_ANONYMOUS:
1210 /* assert "anonymous" */
1211 assertedID = slap_empty_bv;
1214 case LDAP_BACK_IDASSERT_NOASSERT:
1215 /* don't assert; bind as proxyauthzdn */
1218 case LDAP_BACK_IDASSERT_OTHERID:
1219 case LDAP_BACK_IDASSERT_OTHERDN:
1220 /* assert idassert DN */
1221 assertedID = li->idassert_authzID;
1228 if ( BER_BVISNULL( &assertedID ) ) {
1229 assertedID = slap_empty_bv;
1232 if ( op->o_ctrls ) {
1233 for ( i = 0; op->o_ctrls[ i ]; i++ )
1234 /* just count ctrls */ ;
1237 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1238 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1240 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1241 ctrls[ 0 ]->ldctl_iscritical = 1;
1243 switch ( li->idassert_mode ) {
1244 /* already in u:ID or dn:DN form */
1245 case LDAP_BACK_IDASSERT_OTHERID:
1246 case LDAP_BACK_IDASSERT_OTHERDN:
1247 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1250 /* needs the dn: prefix */
1252 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1253 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1254 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1255 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
1256 assertedID.bv_val, assertedID.bv_len + 1 );
1260 if ( op->o_ctrls ) {
1261 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1262 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1265 ctrls[ i + 1 ] = NULL;
1268 if ( ctrls == NULL ) {
1269 ctrls = op->o_ctrls;
1278 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1280 LDAPControl **ctrls = *pctrls;
1282 /* we assume that the first control is the proxyAuthz
1283 * added by back-ldap, so it's the only one we explicitly
1285 if ( ctrls && ctrls != op->o_ctrls ) {
1286 assert( ctrls[ 0 ] != NULL );
1288 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1289 free( ctrls[ 0 ]->ldctl_value.bv_val );