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
28 #include <ac/socket.h>
29 #include <ac/string.h>
33 #include "back-ldap.h"
35 #include <lutil_ldap.h>
37 #define PRINT_CONNTREE 0
39 static LDAP_REBIND_PROC ldap_back_rebind;
42 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs );
45 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
48 ldap_back_bind( Operation *op, SlapReply *rs )
50 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
56 lc = ldap_back_getconn( op, rs, LDAP_BACK_SENDERR );
61 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
62 ch_free( lc->lc_bound_ndn.bv_val );
63 BER_BVZERO( &lc->lc_bound_ndn );
67 /* method is always LDAP_AUTH_SIMPLE if we got here */
68 rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
70 &op->orb_cred, op->o_ctrls, NULL, &msgid );
71 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
73 if ( rc == LDAP_SUCCESS ) {
74 /* If defined, proxyAuthz will be used also when
75 * back-ldap is the authorizing backend; for this
76 * purpose, a successful bind is followed by a
77 * bind with the configured identity assertion */
78 /* NOTE: use with care */
79 if ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
80 ldap_back_proxy_authz_bind( lc, op, rs );
81 if ( lc->lc_bound == 0 ) {
88 ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
90 if ( LDAP_BACK_SAVECRED( li ) ) {
91 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
92 memset( lc->lc_cred.bv_val, 0,
94 ch_free( lc->lc_cred.bv_val );
96 ber_dupbv( &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 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
107 lc = avl_delete( &li->conntree, (caddr_t)lc,
108 ldap_back_conn_cmp );
109 if ( !BER_BVISNULL( &lc->lc_local_ndn ) ) {
110 ch_free( lc->lc_local_ndn.bv_val );
112 ber_dupbv( &lc->lc_local_ndn, &op->o_req_ndn );
113 lerr = avl_insert( &li->conntree, (caddr_t)lc,
114 ldap_back_conn_cmp, ldap_back_conn_dup );
115 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
117 ldap_back_conn_free( lc );
127 * compares two struct ldapconn based on the value of the conn pointer;
131 ldap_back_conn_cmp( const void *c1, const void *c2 )
133 const struct ldapconn *lc1 = (const struct ldapconn *)c1;
134 const struct ldapconn *lc2 = (const struct ldapconn *)c2;
137 /* If local DNs don't match, it is definitely not a match */
138 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
143 /* For shared sessions, conn is NULL. Only explicitly
144 * bound sessions will have non-NULL conn.
146 return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
152 * returns -1 in case a duplicate struct ldapconn has been inserted;
156 ldap_back_conn_dup( void *c1, void *c2 )
158 struct ldapconn *lc1 = (struct ldapconn *)c1;
159 struct ldapconn *lc2 = (struct ldapconn *)c2;
161 /* Cannot have more than one shared session with same DN */
162 if ( dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) &&
163 lc1->lc_conn == lc2->lc_conn )
171 #if PRINT_CONNTREE > 0
173 ravl_print( Avlnode *root, int depth )
182 ravl_print( root->avl_right, depth+1 );
184 for ( i = 0; i < depth; i++ ) {
189 printf( "lc(%lx) local(%s) conn(%lx) %d\n",
190 lc, lc->lc_local_ndn.bv_val, lc->lc_conn, root->avl_bf );
192 ravl_print( root->avl_left, depth+1 );
196 myprint( Avlnode *root )
198 printf( "********\n" );
201 printf( "\tNULL\n" );
204 ravl_print( root, 0 );
207 printf( "********\n" );
209 #endif /* PRINT_CONNTREE */
212 ldap_back_freeconn( Operation *op, struct ldapconn *lc )
214 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
217 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
218 lc = avl_delete( &li->conntree, (caddr_t)lc,
219 ldap_back_conn_cmp );
221 /* something BAD happened */
225 ldap_back_conn_free( (void *)lc );
227 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
233 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
235 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
236 int vers = op->o_protocol;
239 assert( lcp != NULL );
241 rs->sr_err = ldap_initialize( &ld, li->url );
242 if ( rs->sr_err != LDAP_SUCCESS ) {
246 /* Set LDAP version. This will always succeed: If the client
247 * bound with a particular version, then so can we.
249 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&vers );
251 /* automatically chase referrals ("[dont-]chase-referrals" statement) */
252 if ( LDAP_BACK_CHASE_REFERRALS( li ) ) {
253 ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
257 /* start TLS ("tls-[try-]{start,propagate}" statements) */
258 if ( ( LDAP_BACK_USE_TLS( li ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( li ) ) )
259 && !ldap_is_ldaps_url( li->url ) )
261 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
263 * use asynchronous StartTLS
264 * in case, chase referral (not implemented yet)
268 rs->sr_err = ldap_start_tls( ld, NULL, NULL, &msgid );
269 if ( rs->sr_err == LDAP_SUCCESS ) {
270 LDAPMessage *res = NULL;
272 struct timeval tv = { 0, 0 };
275 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
277 rs->sr_err = LDAP_OTHER;
279 } else if ( rc == 0 ) {
286 rs->sr_err = LDAP_OTHER;
288 } else if ( rc == LDAP_RES_EXTENDED ) {
289 struct berval *data = NULL;
291 rs->sr_err = ldap_parse_extended_result( ld, res,
293 if ( rs->sr_err == LDAP_SUCCESS ) {
294 rs->sr_err = ldap_result2error( ld, res, 1 );
297 /* FIXME: in case a referral
298 * is returned, should we try
299 * using it instead of the
301 if ( rs->sr_err == LDAP_SUCCESS ) {
302 ldap_install_tls( ld );
304 } else if ( rs->sr_err == LDAP_REFERRAL ) {
305 rs->sr_err = LDAP_OTHER;
306 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
310 if ( data->bv_val ) {
311 ber_memfree( data->bv_val );
318 rs->sr_err = LDAP_OTHER;
325 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
327 * use synchronous StartTLS
329 rs->sr_err = ldap_start_tls_s( ld, NULL, NULL );
330 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
332 /* if StartTLS is requested, only attempt it if the URL
333 * is not "ldaps://"; this may occur not only in case
334 * of misconfiguration, but also when used in the chain
335 * overlay, where the "uri" can be parsed out of a referral */
336 if ( rs->sr_err == LDAP_SERVER_DOWN
337 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( li ) ) )
339 ldap_unbind_ext_s( ld, NULL, NULL );
343 #endif /* HAVE_TLS */
345 if ( *lcp == NULL ) {
346 *lcp = (struct ldapconn *)ch_malloc( sizeof( struct ldapconn ) );
347 memset( *lcp, 0, sizeof( struct ldapconn ) );
352 if ( rs->sr_err != LDAP_SUCCESS ) {
353 rs->sr_err = slap_map_api2result( rs );
354 if ( sendok & LDAP_BACK_SENDERR ) {
355 if ( rs->sr_text == NULL ) {
356 rs->sr_text = "ldap_initialize() failed";
358 send_ldap_result( op, rs );
367 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
369 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
370 struct ldapconn *lc, lc_curr = { 0 };
372 /* Searches for a ldapconn in the avl tree */
374 /* Explicit binds must not be shared */
375 if ( op->o_tag == LDAP_REQ_BIND
377 && op->o_conn->c_authz_backend
378 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private ) )
380 lc_curr.lc_conn = op->o_conn;
383 lc_curr.lc_conn = NULL;
386 /* Internal searches are privileged and shared. So is root. */
387 if ( op->o_do_not_cache || be_isroot( op ) ) {
388 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
389 lc_curr.lc_conn = NULL;
390 lc_curr.lc_ispriv = 1;
393 lc_curr.lc_local_ndn = op->o_ndn;
396 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
397 lc = (struct ldapconn *)avl_find( li->conntree,
398 (caddr_t)&lc_curr, ldap_back_conn_cmp );
399 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
401 /* Looks like we didn't get a bind. Open a new session... */
403 /* lc here must be NULL */
404 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
408 lc->lc_conn = lc_curr.lc_conn;
409 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
411 ldap_pvt_thread_mutex_init( &lc->lc_mutex );
413 if ( lc_curr.lc_ispriv ) {
414 ber_dupbv( &lc->lc_cred, &li->acl_passwd );
415 ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
416 lc->lc_ispriv = lc_curr.lc_ispriv;
419 BER_BVZERO( &lc->lc_cred );
420 BER_BVZERO( &lc->lc_bound_ndn );
421 if ( op->o_conn && !BER_BVISEMPTY( &op->o_ndn )
422 && op->o_bd == op->o_conn->c_authz_backend )
424 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
430 /* Inserts the newly created ldapconn in the avl tree */
431 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
432 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
433 ldap_back_conn_cmp, ldap_back_conn_dup );
435 #if PRINT_CONNTREE > 0
436 myprint( li->conntree );
437 #endif /* PRINT_CONNTREE */
439 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
441 Debug( LDAP_DEBUG_TRACE,
442 "=>ldap_back_getconn: conn %p inserted\n", (void *) lc, 0, 0 );
444 /* Err could be -1 in case a duplicate ldapconn is inserted */
445 if ( rs->sr_err != 0 ) {
446 ldap_back_conn_free( lc );
447 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
448 send_ldap_error( op, rs, LDAP_OTHER,
449 "internal server error" );
454 Debug( LDAP_DEBUG_TRACE,
455 "=>ldap_back_getconn: conn %p fetched\n", (void *) lc, 0, 0 );
464 * Note: as the check for the value of lc->lc_bound was already here, I removed
465 * it from all the callers, and I made the function return the flag, so
466 * it can be used to simplify the check.
469 ldap_back_dobind_int(
473 ldap_back_send_t sendok,
479 assert( retries >= 0 );
481 if ( !lc->lc_bound ) {
482 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
485 * FIXME: we need to let clients use proxyAuthz
486 * otherwise we cannot do symmetric pools of servers;
487 * we have to live with the fact that a user can
488 * authorize itself as any ID that is allowed
489 * by the authzTo directive of the "proxyauthzdn".
492 * NOTE: current Proxy Authorization specification
493 * and implementation do not allow proxy authorization
494 * control to be provided with Bind requests
497 * if no bind took place yet, but the connection is bound
498 * and the "idassert-authcDN" (or other ID) is set,
499 * then bind as the asserting identity and explicitly
500 * add the proxyAuthz control to every operation with the
501 * dn bound to the connection as control value.
502 * This is done also if this is the authrizing backend,
503 * but the "override" flag is given to idassert.
504 * It allows to use SASL bind and yet proxyAuthz users
506 if ( op->o_conn != NULL &&
507 !op->o_do_not_cache &&
509 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
510 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
512 (void)ldap_back_proxy_authz_bind( lc, op, rs );
516 #ifdef HAVE_CYRUS_SASL
517 if ( lc->lc_ispriv && li->acl_authmethod == LDAP_AUTH_SASL ) {
518 void *defaults = NULL;
520 #if 1 /* will deal with this later... */
521 if ( li->acl_secprops != NULL ) {
522 rc = ldap_set_option( lc->lc_ld,
523 LDAP_OPT_X_SASL_SECPROPS, li->acl_secprops);
525 if( rc != LDAP_OPT_SUCCESS ) {
526 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
527 "(%s,SECPROPS,\"%s\") failed!\n",
528 li->url, li->acl_secprops, 0 );
534 defaults = lutil_sasl_defaults( lc->lc_ld,
535 li->acl_sasl_mech.bv_val,
536 li->acl_sasl_realm.bv_val,
537 li->acl_authcID.bv_val,
538 li->acl_passwd.bv_val,
541 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
542 li->acl_authcDN.bv_val,
543 li->acl_sasl_mech.bv_val, NULL, NULL,
544 LDAP_SASL_QUIET, lutil_sasl_interact,
547 lutil_sasl_freedefs( defaults );
549 rs->sr_err = slap_map_api2result( rs );
550 if ( rs->sr_err != LDAP_SUCCESS ) {
552 send_ldap_result( op, rs );
559 #endif /* HAVE_CYRUS_SASL */
562 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
563 lc->lc_bound_ndn.bv_val,
564 LDAP_SASL_SIMPLE, &lc->lc_cred,
565 NULL, NULL, &msgid );
567 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
569 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
572 /* lc here must be the regular lc, reset and ready for init */
573 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
581 ldap_back_freeconn( op, lc );
582 rs->sr_err = slap_map_api2result( rs );
587 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
588 if ( rc == LDAP_SUCCESS ) {
599 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
603 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
604 rc = ldap_back_dobind_int( lc, op, rs, sendok, 1 );
605 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
613 * This is a callback used for chasing referrals using the same
614 * credentials as the original user on this session.
617 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
618 ber_int_t msgid, void *params )
620 struct ldapconn *lc = (struct ldapconn *)params;
622 /* FIXME: add checks on the URL/identity? */
624 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
625 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
634 ldap_back_send_t sendok )
637 LDAPMessage *res = NULL;
640 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
643 rs->sr_matched = NULL;
645 /* if the error recorded in the reply corresponds
646 * to a successful state, get the error from the
647 * remote server response */
648 if ( ERR_OK( rs->sr_err ) ) {
650 struct timeval tv = { 0, 0 };
653 /* if result parsing fails, note the failure reason */
654 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
657 tv.tv_usec = 100000; /* 0.1 s */
658 ldap_pvt_thread_yield();
662 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
667 /* otherwise get the result; if it is not
668 * LDAP_SUCCESS, record it in the reply
669 * structure (this includes
670 * LDAP_COMPARE_{TRUE|FALSE}) */
672 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
673 &match, &text, NULL, NULL, 1 );
675 if ( rc != LDAP_SUCCESS ) {
681 /* if the error in the reply structure is not
682 * LDAP_SUCCESS, try to map it from client
684 if ( !ERR_OK( rs->sr_err ) ) {
685 rs->sr_err = slap_map_api2result( rs );
687 /* internal ops ( op->o_conn == NULL )
688 * must not reply to client */
689 if ( op->o_conn && !op->o_do_not_cache && match ) {
691 /* record the (massaged) matched
692 * DN into the reply structure */
693 rs->sr_matched = match;
697 ( ( sendok & LDAP_BACK_SENDOK )
698 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
700 send_ldap_result( op, rs );
703 if ( rs->sr_matched != match ) {
704 free( (char *)rs->sr_matched );
706 rs->sr_matched = NULL;
707 ldap_memfree( match );
710 ldap_memfree( text );
713 return( ERR_OK( rs->sr_err ) ? 0 : -1 );
716 /* return true if bound, false if failed */
718 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
722 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
723 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
727 /* lc here must be the regular lc, reset and ready for init */
728 rc = ldap_back_prepare_conn( &lc, op, rs, sendok );
729 if ( rc == LDAP_SUCCESS ) {
730 rc = ldap_back_dobind_int( lc, op, rs, sendok, 0 );
732 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
738 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
740 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
741 struct berval binddn = slap_empty_bv;
742 struct berval bindcred = slap_empty_bv;
748 * FIXME: we need to let clients use proxyAuthz
749 * otherwise we cannot do symmetric pools of servers;
750 * we have to live with the fact that a user can
751 * authorize itself as any ID that is allowed
752 * by the authzTo directive of the "proxyauthzdn".
755 * NOTE: current Proxy Authorization specification
756 * and implementation do not allow proxy authorization
757 * control to be provided with Bind requests
760 * if no bind took place yet, but the connection is bound
761 * and the "proxyauthzdn" is set, then bind as
762 * "proxyauthzdn" and explicitly add the proxyAuthz
763 * control to every operation with the dn bound
764 * to the connection as control value.
767 /* bind as proxyauthzdn only if no idassert mode
768 * is requested, or if the client's identity
770 switch ( li->idassert_mode ) {
771 case LDAP_BACK_IDASSERT_LEGACY:
772 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
773 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
775 binddn = li->idassert_authcDN;
776 bindcred = li->idassert_passwd;
783 if ( li->idassert_authz ) {
784 struct berval authcDN;
786 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
787 authcDN = slap_empty_bv;
789 authcDN = op->o_conn->c_ndn;
791 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
792 &authcDN, &authcDN );
793 if ( rs->sr_err != LDAP_SUCCESS ) {
794 send_ldap_result( op, rs );
800 binddn = li->idassert_authcDN;
801 bindcred = li->idassert_passwd;
806 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
807 #ifdef HAVE_CYRUS_SASL
808 void *defaults = NULL;
809 struct berval authzID = BER_BVNULL;
812 /* if SASL supports native authz, prepare for it */
813 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
814 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
816 switch ( li->idassert_mode ) {
817 case LDAP_BACK_IDASSERT_OTHERID:
818 case LDAP_BACK_IDASSERT_OTHERDN:
819 authzID = li->idassert_authzID;
822 case LDAP_BACK_IDASSERT_ANONYMOUS:
823 BER_BVSTR( &authzID, "dn:" );
826 case LDAP_BACK_IDASSERT_SELF:
827 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
828 /* connection is not authc'd, so don't idassert */
829 BER_BVSTR( &authzID, "dn:" );
832 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
833 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
834 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
835 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
836 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
845 #if 0 /* will deal with this later... */
846 if ( sasl_secprops != NULL ) {
847 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
848 (void *) sasl_secprops );
850 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
851 send_ldap_result( op, rs );
858 defaults = lutil_sasl_defaults( lc->lc_ld,
859 li->idassert_sasl_mech.bv_val,
860 li->idassert_sasl_realm.bv_val,
861 li->idassert_authcID.bv_val,
862 li->idassert_passwd.bv_val,
865 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
866 li->idassert_sasl_mech.bv_val, NULL, NULL,
867 LDAP_SASL_QUIET, lutil_sasl_interact,
870 lutil_sasl_freedefs( defaults );
872 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
875 rs->sr_err = slap_map_api2result( rs );
876 if ( rs->sr_err != LDAP_SUCCESS ) {
878 send_ldap_result( op, rs );
884 #endif /* HAVE_CYRUS_SASL */
887 switch ( li->idassert_authmethod ) {
888 case LDAP_AUTH_SIMPLE:
889 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
890 binddn.bv_val, LDAP_SASL_SIMPLE,
891 &bindcred, NULL, NULL, &msgid );
901 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
902 send_ldap_result( op, rs );
906 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
907 if ( rc == LDAP_SUCCESS ) {
915 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
916 * to existing server-side controls if required; if not,
917 * the existing server-side controls are placed in *pctrls.
918 * The caller, after using the controls in client API
919 * operations, if ( *pctrls != op->o_ctrls ), should
920 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
921 * The function returns success if the control could
922 * be added if required, or if it did nothing; in the future,
923 * it might return some error if it failed.
925 * if no bind took place yet, but the connection is bound
926 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
927 * and explicitly add proxyAuthz the control to every operation
928 * with the dn bound to the connection as control value.
930 * If no server-side controls are defined for the operation,
931 * simply add the proxyAuthz control; otherwise, if the
932 * proxyAuthz control is not already set, add it as
935 * FIXME: is controls order significant for security?
936 * ANSWER: controls ordering and interoperability
937 * must be indicated by the specs of each control; if none
938 * is specified, the order is irrelevant.
941 ldap_back_proxy_authz_ctrl(
945 LDAPControl ***pctrls )
947 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
948 LDAPControl **ctrls = NULL;
951 struct berval assertedID;
955 rs->sr_err = LDAP_SUCCESS;
957 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
958 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) ) {
962 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
966 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
967 if ( op->o_proxy_authz ) {
969 * FIXME: we do not want to perform proxyAuthz
970 * on behalf of the client, because this would
971 * be performed with "proxyauthzdn" privileges.
973 * This might actually be too strict, since
974 * the "proxyauthzdn" authzTo, and each entry's
975 * authzFrom attributes may be crafted
976 * to avoid unwanted proxyAuthz to take place.
979 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
980 rs->sr_text = "proxyAuthz not allowed within namingContext";
985 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
989 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
993 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
997 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
998 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
999 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
1001 /* already asserted in SASL via native authz */
1002 /* NOTE: the test on lc->lc_bound is used to trap
1003 * native authorization of anonymous users,
1004 * since in that case op->o_conn->c_ndn is NULL */
1008 } else if ( li->idassert_authz ) {
1010 struct berval authcDN;
1012 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1013 authcDN = slap_empty_bv;
1015 authcDN = op->o_conn->c_ndn;
1017 rc = slap_sasl_matches( op, li->idassert_authz,
1018 &authcDN, & authcDN );
1019 if ( rc != LDAP_SUCCESS ) {
1020 /* op->o_conn->c_ndn is not authorized
1021 * to use idassert */
1026 if ( op->o_proxy_authz ) {
1029 * 1) ignore the already set proxyAuthz control
1030 * 2) leave it in place, and don't set ours
1032 * 4) reject the operation
1034 * option (4) is very drastic
1035 * option (3) will make the remote server reject
1036 * the operation, thus being equivalent to (4)
1037 * option (2) will likely break the idassert
1038 * assumptions, so we cannot accept it;
1039 * option (1) means that we are contradicting
1040 * the client's reques.
1042 * I think (4) is the only correct choice.
1044 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1045 rs->sr_text = "proxyAuthz not allowed within namingContext";
1048 if ( op->o_do_not_cache && op->o_is_auth_check ) {
1049 mode = LDAP_BACK_IDASSERT_NOASSERT;
1052 mode = li->idassert_mode;
1056 case LDAP_BACK_IDASSERT_LEGACY:
1057 case LDAP_BACK_IDASSERT_SELF:
1058 /* original behavior:
1059 * assert the client's identity */
1060 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1061 assertedID = slap_empty_bv;
1063 assertedID = op->o_conn->c_ndn;
1067 case LDAP_BACK_IDASSERT_ANONYMOUS:
1068 /* assert "anonymous" */
1069 assertedID = slap_empty_bv;
1072 case LDAP_BACK_IDASSERT_NOASSERT:
1073 /* don't assert; bind as proxyauthzdn */
1076 case LDAP_BACK_IDASSERT_OTHERID:
1077 case LDAP_BACK_IDASSERT_OTHERDN:
1078 /* assert idassert DN */
1079 assertedID = li->idassert_authzID;
1086 if ( BER_BVISNULL( &assertedID ) ) {
1087 assertedID = slap_empty_bv;
1090 if ( op->o_ctrls ) {
1091 for ( i = 0; op->o_ctrls[ i ]; i++ )
1092 /* just count ctrls */ ;
1095 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1096 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1098 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1099 ctrls[ 0 ]->ldctl_iscritical = 1;
1101 switch ( li->idassert_mode ) {
1102 /* already in u:ID or dn:DN form */
1103 case LDAP_BACK_IDASSERT_OTHERID:
1104 case LDAP_BACK_IDASSERT_OTHERDN:
1105 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1108 /* needs the dn: prefix */
1110 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1111 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1112 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1113 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val + STRLENOF( "dn:" ),
1114 assertedID.bv_val, assertedID.bv_len + 1 );
1118 if ( op->o_ctrls ) {
1119 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1120 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1123 ctrls[ i + 1 ] = NULL;
1126 if ( ctrls == NULL ) {
1127 ctrls = op->o_ctrls;
1136 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1138 LDAPControl **ctrls = *pctrls;
1140 /* we assume that the first control is the proxyAuthz
1141 * added by back-ldap, so it's the only one we explicitly
1143 if ( ctrls && ctrls != op->o_ctrls ) {
1144 assert( ctrls[ 0 ] );
1146 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1147 free( ctrls[ 0 ]->ldctl_value.bv_val );