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 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
109 if ( lc->lc_refcnt > 1 ) {
110 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
111 ldap_pvt_thread_yield();
115 assert( lc->lc_refcnt == 1 );
116 lc = avl_delete( &li->conntree, (caddr_t)lc,
117 ldap_back_conn_cmp );
118 assert( lc != NULL );
120 ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn );
121 lerr = avl_insert( &li->conntree, (caddr_t)lc,
122 ldap_back_conn_cmp, ldap_back_conn_dup );
123 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
125 /* we can do this because lc_refcnt == 1 */
126 ldap_back_conn_free( lc );
132 ldap_back_release_conn( op, rs, lc );
141 * compares two struct ldapconn based on the value of the conn pointer;
145 ldap_back_conn_cmp( const void *c1, const void *c2 )
147 const struct ldapconn *lc1 = (const struct ldapconn *)c1;
148 const struct ldapconn *lc2 = (const struct ldapconn *)c2;
151 /* If local DNs don't match, it is definitely not a match */
152 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
157 /* For shared sessions, conn is NULL. Only explicitly
158 * bound sessions will have non-NULL conn.
160 return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
166 * returns -1 in case a duplicate struct ldapconn has been inserted;
170 ldap_back_conn_dup( void *c1, void *c2 )
172 struct ldapconn *lc1 = (struct ldapconn *)c1;
173 struct ldapconn *lc2 = (struct ldapconn *)c2;
175 /* Cannot have more than one shared session with same DN */
176 if ( dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) &&
177 lc1->lc_conn == lc2->lc_conn )
185 #if PRINT_CONNTREE > 0
187 ravl_print( Avlnode *root, int depth )
196 ravl_print( root->avl_right, depth+1 );
198 for ( i = 0; i < depth; i++ ) {
203 printf( "lc(%lx) local(%s) conn(%lx) %d\n",
204 lc, lc->lc_local_ndn.bv_val, lc->lc_conn, root->avl_bf );
206 ravl_print( root->avl_left, depth+1 );
210 myprint( Avlnode *root )
212 printf( "********\n" );
215 printf( "\tNULL\n" );
218 ravl_print( root, 0 );
221 printf( "********\n" );
223 #endif /* PRINT_CONNTREE */
226 ldap_back_freeconn( Operation *op, struct ldapconn *lc )
228 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
230 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
232 assert( lc->lc_refcnt > 0 );
233 if ( --lc->lc_refcnt == 0 ) {
234 lc = avl_delete( &li->conntree, (caddr_t)lc,
235 ldap_back_conn_cmp );
236 assert( lc != NULL );
238 ldap_back_conn_free( (void *)lc );
241 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
256 int rc = LDAP_SUCCESS;
259 /* this is ridicolous... */
262 /* start TLS ("tls-[try-]{start,propagate}" statements) */
263 if ( ( LDAP_BACK_USE_TLS( &li ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS( &li ) ) )
264 && !ldap_is_ldaps_url( url ) )
266 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
268 * use asynchronous StartTLS
269 * in case, chase referral (not implemented yet)
273 if ( protocol == 0 ) {
274 ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION,
278 if ( protocol < LDAP_VERSION3 ) {
279 protocol = LDAP_VERSION3;
280 /* Set LDAP version */
281 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION,
282 (const void *)&protocol );
285 rc = ldap_start_tls( ld, NULL, NULL, &msgid );
286 if ( rc == LDAP_SUCCESS ) {
287 LDAPMessage *res = NULL;
289 struct timeval tv = { 0, 100000 };
292 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
296 } else if ( rc == 0 ) {
305 } else if ( rc == LDAP_RES_EXTENDED ) {
306 struct berval *data = NULL;
308 rc = ldap_parse_extended_result( ld, res,
310 if ( rc == LDAP_SUCCESS ) {
311 rc = ldap_result2error( ld, res, 1 );
314 /* FIXME: in case a referral
315 * is returned, should we try
316 * using it instead of the
318 if ( rc == LDAP_SUCCESS ) {
319 rc = ldap_install_tls( ld );
321 } else if ( rc == LDAP_REFERRAL ) {
323 *text = "unwilling to chase referral returned by Start TLS exop";
327 if ( data->bv_val ) {
328 ber_memfree( data->bv_val );
342 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
344 * use synchronous StartTLS
346 rc = ldap_start_tls_s( ld, NULL, NULL );
347 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
349 /* if StartTLS is requested, only attempt it if the URL
350 * is not "ldaps://"; this may occur not only in case
351 * of misconfiguration, but also when used in the chain
352 * overlay, where the "uri" can be parsed out of a referral */
358 case LDAP_SERVER_DOWN:
362 if ( LDAP_BACK_TLS_CRITICAL( &li ) ) {
363 *text = "could not start TLS";
367 /* in case Start TLS is not critical */
379 #endif /* HAVE_TLS */
382 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
384 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
385 int vers = op->o_protocol;
388 int is_tls = op->o_conn->c_is_tls;
389 #endif /* HAVE_TLS */
391 assert( lcp != NULL );
393 rs->sr_err = ldap_initialize( &ld, li->url );
394 if ( rs->sr_err != LDAP_SUCCESS ) {
398 /* Set LDAP version. This will always succeed: If the client
399 * bound with a particular version, then so can we.
401 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&vers );
403 /* automatically chase referrals ("[dont-]chase-referrals" statement) */
404 if ( LDAP_BACK_CHASE_REFERRALS( li ) ) {
405 ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
409 rs->sr_err = ldap_back_start_tls( ld,
410 op->o_protocol, &is_tls,
411 li->url, li->flags, &rs->sr_text );
412 if ( rs->sr_err != LDAP_SUCCESS ) {
413 ldap_unbind_ext( ld, NULL, NULL );
416 #endif /* HAVE_TLS */
418 if ( *lcp == NULL ) {
419 *lcp = (struct ldapconn *)ch_calloc( 1, sizeof( struct ldapconn ) );
420 (*lcp)->lc_flags= li->flags;
423 (*lcp)->lc_refcnt = 1;
425 (*lcp)->lc_is_tls = is_tls;
426 #endif /* HAVE_TLS */
429 if ( rs->sr_err != LDAP_SUCCESS ) {
430 rs->sr_err = slap_map_api2result( rs );
431 if ( sendok & LDAP_BACK_SENDERR ) {
432 if ( rs->sr_text == NULL ) {
433 rs->sr_text = "ldap_initialize() failed";
435 send_ldap_result( op, rs );
444 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
446 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
451 /* Searches for a ldapconn in the avl tree */
453 /* Explicit binds must not be shared */
454 if ( op->o_tag == LDAP_REQ_BIND
456 && op->o_conn->c_authz_backend
457 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private ) )
459 lc_curr.lc_conn = op->o_conn;
463 if ( op->o_conn->c_is_tls ) {
464 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN_TLS;
466 #endif /* HAVE_TLS */
468 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN;
472 /* Internal searches are privileged and shared. So is root. */
473 /* FIXME: there seem to be concurrency issues */
474 if ( op->o_do_not_cache || be_isroot( op ) ) {
475 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
477 if ( op->o_conn->c_is_tls ) {
478 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN_TLS;
480 #endif /* HAVE_TLS */
482 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN;
484 lc_curr.lc_ispriv = 1;
487 lc_curr.lc_local_ndn = op->o_ndn;
490 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
492 lc = (struct ldapconn *)avl_find( li->conntree,
493 (caddr_t)&lc_curr, ldap_back_conn_cmp );
495 refcnt = ++lc->lc_refcnt;
497 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
499 /* Looks like we didn't get a bind. Open a new session... */
501 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
505 lc->lc_conn = lc_curr.lc_conn;
506 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
508 if ( lc_curr.lc_ispriv ) {
509 ber_dupbv( &lc->lc_cred, &li->acl_passwd );
510 ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
511 lc->lc_ispriv = lc_curr.lc_ispriv;
514 BER_BVZERO( &lc->lc_cred );
515 BER_BVZERO( &lc->lc_bound_ndn );
516 if ( op->o_conn && !BER_BVISEMPTY( &op->o_ndn )
517 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private )
519 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
524 /* if start TLS failed but it was not mandatory,
525 * check if the non-TLS connection was already
526 * in cache; in case, destroy the newly created
527 * connection and use the existing one */
528 if ( lc->lc_conn == LDAP_BACK_PRIV_CONN_TLS
529 && !ldap_tls_inplace( lc->lc_ld ) )
531 struct ldapconn *tmplc;
533 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN;
534 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
535 tmplc = (struct ldapconn *)avl_find( li->conntree,
536 (caddr_t)&lc_curr, ldap_back_conn_cmp );
537 if ( tmplc != NULL ) {
538 refcnt = ++tmplc->lc_refcnt;
539 ldap_back_conn_free( lc );
542 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
544 if ( tmplc != NULL ) {
548 #endif /* HAVE_TLS */
552 /* Inserts the newly created ldapconn in the avl tree */
553 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
555 assert( lc->lc_refcnt == 1 );
556 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
557 ldap_back_conn_cmp, ldap_back_conn_dup );
559 #if PRINT_CONNTREE > 0
560 myprint( li->conntree );
561 #endif /* PRINT_CONNTREE */
563 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
565 Debug( LDAP_DEBUG_TRACE,
566 "=>ldap_back_getconn: conn %p inserted (refcnt=%u)\n",
567 (void *)lc, refcnt, 0 );
569 /* Err could be -1 in case a duplicate ldapconn is inserted */
570 if ( rs->sr_err != 0 ) {
571 ldap_back_conn_free( lc );
572 rs->sr_err = LDAP_OTHER;
573 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
574 send_ldap_error( op, rs, LDAP_OTHER,
575 "internal server error" );
581 Debug( LDAP_DEBUG_TRACE,
582 "=>ldap_back_getconn: conn %p fetched (refcnt=%u)\n",
583 (void *)lc, refcnt, 0 );
591 ldap_back_release_conn(
594 struct ldapconn *lc )
596 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
598 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
599 assert( lc->lc_refcnt > 0 );
601 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
607 * Note: as the check for the value of lc->lc_bound was already here, I removed
608 * it from all the callers, and I made the function return the flag, so
609 * it can be used to simplify the check.
611 * Note: dolock indicates whether li->conn_mutex must be locked or not
614 ldap_back_dobind_int(
618 ldap_back_send_t sendok,
625 assert( retries >= 0 );
627 if ( !lc->lc_bound ) {
628 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
631 * FIXME: we need to let clients use proxyAuthz
632 * otherwise we cannot do symmetric pools of servers;
633 * we have to live with the fact that a user can
634 * authorize itself as any ID that is allowed
635 * by the authzTo directive of the "proxyauthzdn".
638 * NOTE: current Proxy Authorization specification
639 * and implementation do not allow proxy authorization
640 * control to be provided with Bind requests
643 * if no bind took place yet, but the connection is bound
644 * and the "idassert-authcDN" (or other ID) is set,
645 * then bind as the asserting identity and explicitly
646 * add the proxyAuthz control to every operation with the
647 * dn bound to the connection as control value.
648 * This is done also if this is the authrizing backend,
649 * but the "override" flag is given to idassert.
650 * It allows to use SASL bind and yet proxyAuthz users
652 if ( op->o_conn != NULL &&
653 !op->o_do_not_cache &&
654 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
655 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
657 (void)ldap_back_proxy_authz_bind( lc, op, rs );
661 #ifdef HAVE_CYRUS_SASL
662 if ( lc->lc_ispriv && li->acl_authmethod == LDAP_AUTH_SASL ) {
663 void *defaults = NULL;
665 #if 1 /* will deal with this later... */
666 if ( li->acl_secprops != NULL ) {
667 rc = ldap_set_option( lc->lc_ld,
668 LDAP_OPT_X_SASL_SECPROPS, li->acl_secprops);
670 if( rc != LDAP_OPT_SUCCESS ) {
671 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
672 "(%s,SECPROPS,\"%s\") failed!\n",
673 li->url, li->acl_secprops, 0 );
679 defaults = lutil_sasl_defaults( lc->lc_ld,
680 li->acl_sasl_mech.bv_val,
681 li->acl_sasl_realm.bv_val,
682 li->acl_authcID.bv_val,
683 li->acl_passwd.bv_val,
686 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
687 li->acl_authcDN.bv_val,
688 li->acl_sasl_mech.bv_val, NULL, NULL,
689 LDAP_SASL_QUIET, lutil_sasl_interact,
692 lutil_sasl_freedefs( defaults );
694 rs->sr_err = slap_map_api2result( rs );
695 if ( rs->sr_err != LDAP_SUCCESS ) {
697 send_ldap_result( op, rs );
704 #endif /* HAVE_CYRUS_SASL */
707 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
708 lc->lc_bound_ndn.bv_val,
709 LDAP_SASL_SIMPLE, &lc->lc_cred,
710 NULL, NULL, &msgid );
712 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
715 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
718 assert( lc->lc_refcnt > 0 );
719 if ( lc->lc_refcnt == 1 ) {
720 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
723 /* lc here must be the regular lc, reset and ready for init */
724 rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
727 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
729 if ( rs->sr_err == LDAP_SUCCESS ) {
735 ldap_back_freeconn( op, lc );
736 rs->sr_err = slap_map_api2result( rs );
741 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
742 if ( rc == LDAP_SUCCESS ) {
753 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
755 return ldap_back_dobind_int( lc, op, rs, sendok, 1, 1 );
761 * This is a callback used for chasing referrals using the same
762 * credentials as the original user on this session.
765 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
766 ber_int_t msgid, void *params )
768 struct ldapconn *lc = (struct ldapconn *)params;
771 /* ... otherwise we couldn't get here */
772 assert( lc != NULL );
774 if ( !ldap_tls_inplace( ld ) ) {
775 int is_tls = lc->lc_is_tls,
777 const char *text = NULL;
779 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags, &text );
780 if ( rc != LDAP_SUCCESS ) {
784 #endif /* HAVE_TLS */
786 /* FIXME: add checks on the URL/identity? */
788 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
789 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
798 ldap_back_send_t sendok )
801 LDAPMessage *res = NULL;
804 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
807 rs->sr_matched = NULL;
809 /* if the error recorded in the reply corresponds
810 * to a successful state, get the error from the
811 * remote server response */
812 if ( ERR_OK( rs->sr_err ) ) {
814 struct timeval tv = { 0, 100000 };
817 /* if result parsing fails, note the failure reason */
818 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
821 tv.tv_usec = 100000; /* 0.1 s */
822 ldap_pvt_thread_yield();
826 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
831 /* otherwise get the result; if it is not
832 * LDAP_SUCCESS, record it in the reply
833 * structure (this includes
834 * LDAP_COMPARE_{TRUE|FALSE}) */
836 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
837 &match, &text, NULL, NULL, 1 );
839 if ( rc != LDAP_SUCCESS ) {
845 /* if the error in the reply structure is not
846 * LDAP_SUCCESS, try to map it from client
848 if ( !ERR_OK( rs->sr_err ) ) {
849 rs->sr_err = slap_map_api2result( rs );
851 /* internal ops ( op->o_conn == NULL )
852 * must not reply to client */
853 if ( op->o_conn && !op->o_do_not_cache && match ) {
855 /* record the (massaged) matched
856 * DN into the reply structure */
857 rs->sr_matched = match;
861 ( ( sendok & LDAP_BACK_SENDOK )
862 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
864 send_ldap_result( op, rs );
867 if ( rs->sr_matched != match ) {
868 free( (char *)rs->sr_matched );
870 rs->sr_matched = NULL;
871 ldap_memfree( match );
874 ldap_memfree( text );
877 return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
880 /* return true if bound, false if failed */
882 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
885 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
887 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
889 if ( lc->lc_refcnt == 1 ) {
890 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
894 /* lc here must be the regular lc, reset and ready for init */
895 rc = ldap_back_prepare_conn( &lc, op, rs, sendok );
896 if ( rc == LDAP_SUCCESS ) {
897 rc = ldap_back_dobind_int( lc, op, rs, sendok, 0, 0 );
901 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
907 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
909 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
910 struct berval binddn = slap_empty_bv;
911 struct berval bindcred = slap_empty_bv;
917 * FIXME: we need to let clients use proxyAuthz
918 * otherwise we cannot do symmetric pools of servers;
919 * we have to live with the fact that a user can
920 * authorize itself as any ID that is allowed
921 * by the authzTo directive of the "proxyauthzdn".
924 * NOTE: current Proxy Authorization specification
925 * and implementation do not allow proxy authorization
926 * control to be provided with Bind requests
929 * if no bind took place yet, but the connection is bound
930 * and the "proxyauthzdn" is set, then bind as
931 * "proxyauthzdn" and explicitly add the proxyAuthz
932 * control to every operation with the dn bound
933 * to the connection as control value.
936 /* bind as proxyauthzdn only if no idassert mode
937 * is requested, or if the client's identity
939 switch ( li->idassert_mode ) {
940 case LDAP_BACK_IDASSERT_LEGACY:
941 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
942 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
944 binddn = li->idassert_authcDN;
945 bindcred = li->idassert_passwd;
952 /* NOTE: rootdn can always idassert */
953 if ( li->idassert_authz && !be_isroot( op ) ) {
954 struct berval authcDN;
956 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
957 authcDN = slap_empty_bv;
960 authcDN = op->o_conn->c_ndn;
962 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
963 &authcDN, &authcDN );
964 if ( rs->sr_err != LDAP_SUCCESS ) {
965 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
966 send_ldap_result( op, rs );
970 rs->sr_err = LDAP_SUCCESS;
971 binddn = slap_empty_bv;
972 bindcred = slap_empty_bv;
980 binddn = li->idassert_authcDN;
981 bindcred = li->idassert_passwd;
986 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
987 #ifdef HAVE_CYRUS_SASL
988 void *defaults = NULL;
989 struct berval authzID = BER_BVNULL;
992 /* if SASL supports native authz, prepare for it */
993 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
994 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
996 switch ( li->idassert_mode ) {
997 case LDAP_BACK_IDASSERT_OTHERID:
998 case LDAP_BACK_IDASSERT_OTHERDN:
999 authzID = li->idassert_authzID;
1002 case LDAP_BACK_IDASSERT_ANONYMOUS:
1003 BER_BVSTR( &authzID, "dn:" );
1006 case LDAP_BACK_IDASSERT_SELF:
1007 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1008 /* connection is not authc'd, so don't idassert */
1009 BER_BVSTR( &authzID, "dn:" );
1012 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
1013 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1014 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1015 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1016 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
1025 #if 0 /* will deal with this later... */
1026 if ( sasl_secprops != NULL ) {
1027 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
1028 (void *) sasl_secprops );
1030 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1031 send_ldap_result( op, rs );
1038 defaults = lutil_sasl_defaults( lc->lc_ld,
1039 li->idassert_sasl_mech.bv_val,
1040 li->idassert_sasl_realm.bv_val,
1041 li->idassert_authcID.bv_val,
1042 li->idassert_passwd.bv_val,
1045 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
1046 li->idassert_sasl_mech.bv_val, NULL, NULL,
1047 LDAP_SASL_QUIET, lutil_sasl_interact,
1050 lutil_sasl_freedefs( defaults );
1052 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1055 rs->sr_err = slap_map_api2result( rs );
1056 if ( rs->sr_err != LDAP_SUCCESS ) {
1058 send_ldap_result( op, rs );
1064 #endif /* HAVE_CYRUS_SASL */
1067 switch ( li->idassert_authmethod ) {
1068 case LDAP_AUTH_SIMPLE:
1069 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1070 binddn.bv_val, LDAP_SASL_SIMPLE,
1071 &bindcred, NULL, NULL, &msgid );
1074 case LDAP_AUTH_NONE:
1081 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1082 send_ldap_result( op, rs );
1086 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
1087 if ( rc == LDAP_SUCCESS ) {
1091 return lc->lc_bound;
1095 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
1096 * to existing server-side controls if required; if not,
1097 * the existing server-side controls are placed in *pctrls.
1098 * The caller, after using the controls in client API
1099 * operations, if ( *pctrls != op->o_ctrls ), should
1100 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
1101 * The function returns success if the control could
1102 * be added if required, or if it did nothing; in the future,
1103 * it might return some error if it failed.
1105 * if no bind took place yet, but the connection is bound
1106 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
1107 * and explicitly add proxyAuthz the control to every operation
1108 * with the dn bound to the connection as control value.
1110 * If no server-side controls are defined for the operation,
1111 * simply add the proxyAuthz control; otherwise, if the
1112 * proxyAuthz control is not already set, add it as
1115 * FIXME: is controls order significant for security?
1116 * ANSWER: controls ordering and interoperability
1117 * must be indicated by the specs of each control; if none
1118 * is specified, the order is irrelevant.
1121 ldap_back_proxy_authz_ctrl(
1122 struct ldapconn *lc,
1125 LDAPControl ***pctrls )
1127 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
1128 LDAPControl **ctrls = NULL;
1131 struct berval assertedID;
1135 rs->sr_err = LDAP_SUCCESS;
1137 /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
1138 * but if it is not set this test fails. We need a different
1139 * means to detect if idassert is enabled */
1140 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
1141 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) )
1146 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
1150 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
1151 if ( op->o_proxy_authz ) {
1153 * FIXME: we do not want to perform proxyAuthz
1154 * on behalf of the client, because this would
1155 * be performed with "proxyauthzdn" privileges.
1157 * This might actually be too strict, since
1158 * the "proxyauthzdn" authzTo, and each entry's
1159 * authzFrom attributes may be crafted
1160 * to avoid unwanted proxyAuthz to take place.
1163 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1164 rs->sr_text = "proxyAuthz not allowed within namingContext";
1169 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1173 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1177 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
1181 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
1182 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1183 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
1185 /* already asserted in SASL via native authz */
1186 /* NOTE: the test on lc->lc_bound is used to trap
1187 * native authorization of anonymous users,
1188 * since in that case op->o_conn->c_ndn is NULL */
1192 } else if ( li->idassert_authz && !be_isroot( op ) ) {
1194 struct berval authcDN;
1196 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1197 authcDN = slap_empty_bv;
1199 authcDN = op->o_conn->c_ndn;
1201 rc = slap_sasl_matches( op, li->idassert_authz,
1202 &authcDN, & authcDN );
1203 if ( rc != LDAP_SUCCESS ) {
1204 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
1206 /* op->o_conn->c_ndn is not authorized
1207 * to use idassert */
1214 if ( op->o_proxy_authz ) {
1217 * 1) ignore the already set proxyAuthz control
1218 * 2) leave it in place, and don't set ours
1220 * 4) reject the operation
1222 * option (4) is very drastic
1223 * option (3) will make the remote server reject
1224 * the operation, thus being equivalent to (4)
1225 * option (2) will likely break the idassert
1226 * assumptions, so we cannot accept it;
1227 * option (1) means that we are contradicting
1228 * the client's reques.
1230 * I think (4) is the only correct choice.
1232 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1233 rs->sr_text = "proxyAuthz not allowed within namingContext";
1236 if ( op->o_do_not_cache && op->o_is_auth_check ) {
1237 mode = LDAP_BACK_IDASSERT_NOASSERT;
1240 mode = li->idassert_mode;
1244 case LDAP_BACK_IDASSERT_LEGACY:
1245 case LDAP_BACK_IDASSERT_SELF:
1246 /* original behavior:
1247 * assert the client's identity */
1248 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1249 assertedID = slap_empty_bv;
1251 assertedID = op->o_conn->c_ndn;
1255 case LDAP_BACK_IDASSERT_ANONYMOUS:
1256 /* assert "anonymous" */
1257 assertedID = slap_empty_bv;
1260 case LDAP_BACK_IDASSERT_NOASSERT:
1261 /* don't assert; bind as proxyauthzdn */
1264 case LDAP_BACK_IDASSERT_OTHERID:
1265 case LDAP_BACK_IDASSERT_OTHERDN:
1266 /* assert idassert DN */
1267 assertedID = li->idassert_authzID;
1274 if ( BER_BVISNULL( &assertedID ) ) {
1275 assertedID = slap_empty_bv;
1278 if ( op->o_ctrls ) {
1279 for ( i = 0; op->o_ctrls[ i ]; i++ )
1280 /* just count ctrls */ ;
1283 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1284 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1286 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1287 ctrls[ 0 ]->ldctl_iscritical = 1;
1289 switch ( li->idassert_mode ) {
1290 /* already in u:ID or dn:DN form */
1291 case LDAP_BACK_IDASSERT_OTHERID:
1292 case LDAP_BACK_IDASSERT_OTHERDN:
1293 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1296 /* needs the dn: prefix */
1298 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1299 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1300 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1301 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
1302 assertedID.bv_val, assertedID.bv_len + 1 );
1306 if ( op->o_ctrls ) {
1307 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1308 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1311 ctrls[ i + 1 ] = NULL;
1314 if ( ctrls == NULL ) {
1315 ctrls = op->o_ctrls;
1324 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1326 LDAPControl **ctrls = *pctrls;
1328 /* we assume that the first control is the proxyAuthz
1329 * added by back-ldap, so it's the only one we explicitly
1331 if ( ctrls && ctrls != op->o_ctrls ) {
1332 assert( ctrls[ 0 ] != NULL );
1334 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1335 free( ctrls[ 0 ]->ldctl_value.bv_val );