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;
216 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
217 lc = avl_delete( &li->conntree, (caddr_t)lc,
218 ldap_back_conn_cmp );
219 ldap_back_conn_free( (void *)lc );
220 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
226 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
228 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
229 int vers = op->o_protocol;
232 assert( lcp != NULL );
234 rs->sr_err = ldap_initialize( &ld, li->url );
235 if ( rs->sr_err != LDAP_SUCCESS ) {
239 /* Set LDAP version. This will always succeed: If the client
240 * bound with a particular version, then so can we.
242 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&vers );
244 /* automatically chase referrals ("[dont-]chase-referrals" statement) */
245 if ( LDAP_BACK_CHASE_REFERRALS( li ) ) {
246 ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
250 /* start TLS ("tls-[try-]{start,propagate}" statements) */
251 if ( ( LDAP_BACK_USE_TLS( li ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( li ) ) )
252 && !ldap_is_ldaps_url( li->url ) )
254 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
256 * use asynchronous StartTLS
257 * in case, chase referral (not implemented yet)
261 rs->sr_err = ldap_start_tls( ld, NULL, NULL, &msgid );
262 if ( rs->sr_err == LDAP_SUCCESS ) {
263 LDAPMessage *res = NULL;
265 struct timeval tv = { 0, 0 };
268 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
270 rs->sr_err = LDAP_OTHER;
272 } else if ( rc == 0 ) {
279 rs->sr_err = LDAP_OTHER;
281 } else if ( rc == LDAP_RES_EXTENDED ) {
282 struct berval *data = NULL;
284 rs->sr_err = ldap_parse_extended_result( ld, res,
286 if ( rs->sr_err == LDAP_SUCCESS ) {
287 rs->sr_err = ldap_result2error( ld, res, 1 );
290 /* FIXME: in case a referral
291 * is returned, should we try
292 * using it instead of the
294 if ( rs->sr_err == LDAP_SUCCESS ) {
295 ldap_install_tls( ld );
297 } else if ( rs->sr_err == LDAP_REFERRAL ) {
298 rs->sr_err = LDAP_OTHER;
299 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
303 if ( data->bv_val ) {
304 ber_memfree( data->bv_val );
311 rs->sr_err = LDAP_OTHER;
318 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
320 * use synchronous StartTLS
322 rs->sr_err = ldap_start_tls_s( ld, NULL, NULL );
323 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
325 /* if StartTLS is requested, only attempt it if the URL
326 * is not "ldaps://"; this may occur not only in case
327 * of misconfiguration, but also when used in the chain
328 * overlay, where the "uri" can be parsed out of a referral */
329 if ( rs->sr_err == LDAP_SERVER_DOWN
330 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( li ) ) )
332 ldap_unbind_ext_s( ld, NULL, NULL );
336 #endif /* HAVE_TLS */
338 if ( *lcp == NULL ) {
339 *lcp = (struct ldapconn *)ch_malloc( sizeof( struct ldapconn ) );
340 memset( *lcp, 0, sizeof( struct ldapconn ) );
345 if ( rs->sr_err != LDAP_SUCCESS ) {
346 rs->sr_err = slap_map_api2result( rs );
347 if ( sendok & LDAP_BACK_SENDERR ) {
348 if ( rs->sr_text == NULL ) {
349 rs->sr_text = "ldap_initialize() failed";
351 send_ldap_result( op, rs );
360 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
362 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
363 struct ldapconn *lc, lc_curr = { 0 };
365 /* Searches for a ldapconn in the avl tree */
367 /* Explicit binds must not be shared */
368 if ( op->o_tag == LDAP_REQ_BIND
370 && op->o_conn->c_authz_backend
371 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private ) )
373 lc_curr.lc_conn = op->o_conn;
376 lc_curr.lc_conn = NULL;
379 /* Internal searches are privileged and shared. So is root. */
380 if ( op->o_do_not_cache || be_isroot( op ) ) {
381 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
382 lc_curr.lc_conn = NULL;
383 lc_curr.lc_ispriv = 1;
386 lc_curr.lc_local_ndn = op->o_ndn;
389 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
390 lc = (struct ldapconn *)avl_find( li->conntree,
391 (caddr_t)&lc_curr, ldap_back_conn_cmp );
392 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
394 /* Looks like we didn't get a bind. Open a new session... */
396 /* lc here must be NULL */
397 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
401 lc->lc_conn = lc_curr.lc_conn;
402 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
404 ldap_pvt_thread_mutex_init( &lc->lc_mutex );
406 if ( lc_curr.lc_ispriv ) {
407 ber_dupbv( &lc->lc_cred, &li->acl_passwd );
408 ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
409 lc->lc_ispriv = lc_curr.lc_ispriv;
412 BER_BVZERO( &lc->lc_cred );
413 BER_BVZERO( &lc->lc_bound_ndn );
414 if ( op->o_conn && !BER_BVISEMPTY( &op->o_ndn )
415 && op->o_bd == op->o_conn->c_authz_backend )
417 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
423 /* Inserts the newly created ldapconn in the avl tree */
424 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
425 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
426 ldap_back_conn_cmp, ldap_back_conn_dup );
428 #if PRINT_CONNTREE > 0
429 myprint( li->conntree );
430 #endif /* PRINT_CONNTREE */
432 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
434 Debug( LDAP_DEBUG_TRACE,
435 "=>ldap_back_getconn: conn %p inserted\n", (void *) lc, 0, 0 );
437 /* Err could be -1 in case a duplicate ldapconn is inserted */
438 if ( rs->sr_err != 0 ) {
439 ldap_back_conn_free( lc );
440 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
441 send_ldap_error( op, rs, LDAP_OTHER,
442 "internal server error" );
447 Debug( LDAP_DEBUG_TRACE,
448 "=>ldap_back_getconn: conn %p fetched\n", (void *) lc, 0, 0 );
457 * Note: as the check for the value of lc->lc_bound was already here, I removed
458 * it from all the callers, and I made the function return the flag, so
459 * it can be used to simplify the check.
462 ldap_back_dobind_int(
466 ldap_back_send_t sendok,
472 assert( retries >= 0 );
474 if ( !lc->lc_bound ) {
475 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
478 * FIXME: we need to let clients use proxyAuthz
479 * otherwise we cannot do symmetric pools of servers;
480 * we have to live with the fact that a user can
481 * authorize itself as any ID that is allowed
482 * by the authzTo directive of the "proxyauthzdn".
485 * NOTE: current Proxy Authorization specification
486 * and implementation do not allow proxy authorization
487 * control to be provided with Bind requests
490 * if no bind took place yet, but the connection is bound
491 * and the "idassert-authcDN" (or other ID) is set,
492 * then bind as the asserting identity and explicitly
493 * add the proxyAuthz control to every operation with the
494 * dn bound to the connection as control value.
495 * This is done also if this is the authrizing backend,
496 * but the "override" flag is given to idassert.
497 * It allows to use SASL bind and yet proxyAuthz users
499 if ( op->o_conn != NULL &&
500 !op->o_do_not_cache &&
502 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
503 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
505 (void)ldap_back_proxy_authz_bind( lc, op, rs );
509 #ifdef HAVE_CYRUS_SASL
510 if ( lc->lc_ispriv && li->acl_authmethod == LDAP_AUTH_SASL ) {
511 void *defaults = NULL;
513 #if 0 /* will deal with this later... */
514 if ( sasl_secprops != NULL ) {
515 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
516 (void *) sasl_secprops );
518 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
519 send_ldap_result( op, rs );
526 defaults = lutil_sasl_defaults( lc->lc_ld,
527 li->acl_sasl_mech.bv_val,
528 li->acl_sasl_realm.bv_val,
529 li->acl_authcID.bv_val,
530 li->acl_passwd.bv_val,
533 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
534 li->acl_authcDN.bv_val,
535 li->acl_sasl_mech.bv_val, NULL, NULL,
536 LDAP_SASL_QUIET, lutil_sasl_interact,
539 lutil_sasl_freedefs( defaults );
541 rs->sr_err = slap_map_api2result( rs );
542 if ( rs->sr_err != LDAP_SUCCESS ) {
544 send_ldap_result( op, rs );
551 #endif /* HAVE_CYRUS_SASL */
554 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
555 lc->lc_bound_ndn.bv_val,
556 LDAP_SASL_SIMPLE, &lc->lc_cred,
557 NULL, NULL, &msgid );
559 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
561 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
564 /* lc here must be the regular lc, reset and ready for init */
565 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
573 ldap_back_freeconn( op, lc );
574 rs->sr_err = slap_map_api2result( rs );
579 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
580 if ( rc == LDAP_SUCCESS ) {
591 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
595 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
596 rc = ldap_back_dobind_int( lc, op, rs, sendok, 1 );
597 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
605 * This is a callback used for chasing referrals using the same
606 * credentials as the original user on this session.
609 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
610 ber_int_t msgid, void *params )
612 struct ldapconn *lc = (struct ldapconn *)params;
614 /* FIXME: add checks on the URL/identity? */
616 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
617 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
626 ldap_back_send_t sendok )
629 LDAPMessage *res = NULL;
632 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
635 rs->sr_matched = NULL;
637 /* if the error recorded in the reply corresponds
638 * to a successful state, get the error from the
639 * remote server response */
640 if ( ERR_OK( rs->sr_err ) ) {
642 struct timeval tv = { 0, 0 };
645 /* if result parsing fails, note the failure reason */
646 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
649 tv.tv_usec = 100000; /* 0.1 s */
650 ldap_pvt_thread_yield();
654 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
659 /* otherwise get the result; if it is not
660 * LDAP_SUCCESS, record it in the reply
661 * structure (this includes
662 * LDAP_COMPARE_{TRUE|FALSE}) */
664 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
665 &match, &text, NULL, NULL, 1 );
667 if ( rc != LDAP_SUCCESS ) {
673 /* if the error in the reply structure is not
674 * LDAP_SUCCESS, try to map it from client
676 if ( !ERR_OK( rs->sr_err ) ) {
677 rs->sr_err = slap_map_api2result( rs );
679 /* internal ops ( op->o_conn == NULL )
680 * must not reply to client */
681 if ( op->o_conn && !op->o_do_not_cache && match ) {
683 /* record the (massaged) matched
684 * DN into the reply structure */
685 rs->sr_matched = match;
689 ( ( sendok & LDAP_BACK_SENDOK )
690 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
692 send_ldap_result( op, rs );
695 if ( rs->sr_matched != match ) {
696 free( (char *)rs->sr_matched );
698 rs->sr_matched = NULL;
699 ldap_memfree( match );
702 ldap_memfree( text );
705 return( ERR_OK( rs->sr_err ) ? 0 : -1 );
708 /* return true if bound, false if failed */
710 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
714 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
715 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
719 /* lc here must be the regular lc, reset and ready for init */
720 rc = ldap_back_prepare_conn( &lc, op, rs, sendok );
721 if ( rc == LDAP_SUCCESS ) {
722 rc = ldap_back_dobind_int( lc, op, rs, sendok, 0 );
724 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
730 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
732 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
733 struct berval binddn = slap_empty_bv;
734 struct berval bindcred = slap_empty_bv;
740 * FIXME: we need to let clients use proxyAuthz
741 * otherwise we cannot do symmetric pools of servers;
742 * we have to live with the fact that a user can
743 * authorize itself as any ID that is allowed
744 * by the authzTo directive of the "proxyauthzdn".
747 * NOTE: current Proxy Authorization specification
748 * and implementation do not allow proxy authorization
749 * control to be provided with Bind requests
752 * if no bind took place yet, but the connection is bound
753 * and the "proxyauthzdn" is set, then bind as
754 * "proxyauthzdn" and explicitly add the proxyAuthz
755 * control to every operation with the dn bound
756 * to the connection as control value.
759 /* bind as proxyauthzdn only if no idassert mode
760 * is requested, or if the client's identity
762 switch ( li->idassert_mode ) {
763 case LDAP_BACK_IDASSERT_LEGACY:
764 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
765 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
767 binddn = li->idassert_authcDN;
768 bindcred = li->idassert_passwd;
775 if ( li->idassert_authz ) {
776 struct berval authcDN;
778 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
779 authcDN = slap_empty_bv;
781 authcDN = op->o_conn->c_ndn;
783 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
784 &authcDN, &authcDN );
785 if ( rs->sr_err != LDAP_SUCCESS ) {
786 send_ldap_result( op, rs );
792 binddn = li->idassert_authcDN;
793 bindcred = li->idassert_passwd;
798 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
799 #ifdef HAVE_CYRUS_SASL
800 void *defaults = NULL;
801 struct berval authzID = BER_BVNULL;
804 /* if SASL supports native authz, prepare for it */
805 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
806 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
808 switch ( li->idassert_mode ) {
809 case LDAP_BACK_IDASSERT_OTHERID:
810 case LDAP_BACK_IDASSERT_OTHERDN:
811 authzID = li->idassert_authzID;
814 case LDAP_BACK_IDASSERT_ANONYMOUS:
815 BER_BVSTR( &authzID, "dn:" );
818 case LDAP_BACK_IDASSERT_SELF:
819 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
820 /* connection is not authc'd, so don't idassert */
821 BER_BVSTR( &authzID, "dn:" );
824 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
825 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
826 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
827 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
828 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
837 #if 0 /* will deal with this later... */
838 if ( sasl_secprops != NULL ) {
839 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
840 (void *) sasl_secprops );
842 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
843 send_ldap_result( op, rs );
850 defaults = lutil_sasl_defaults( lc->lc_ld,
851 li->idassert_sasl_mech.bv_val,
852 li->idassert_sasl_realm.bv_val,
853 li->idassert_authcID.bv_val,
854 li->idassert_passwd.bv_val,
857 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
858 li->idassert_sasl_mech.bv_val, NULL, NULL,
859 LDAP_SASL_QUIET, lutil_sasl_interact,
862 lutil_sasl_freedefs( defaults );
864 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
867 rs->sr_err = slap_map_api2result( rs );
868 if ( rs->sr_err != LDAP_SUCCESS ) {
870 send_ldap_result( op, rs );
876 #endif /* HAVE_CYRUS_SASL */
879 switch ( li->idassert_authmethod ) {
880 case LDAP_AUTH_SIMPLE:
881 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
882 binddn.bv_val, LDAP_SASL_SIMPLE,
883 &bindcred, NULL, NULL, &msgid );
893 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
894 send_ldap_result( op, rs );
898 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
899 if ( rc == LDAP_SUCCESS ) {
907 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
908 * to existing server-side controls if required; if not,
909 * the existing server-side controls are placed in *pctrls.
910 * The caller, after using the controls in client API
911 * operations, if ( *pctrls != op->o_ctrls ), should
912 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
913 * The function returns success if the control could
914 * be added if required, or if it did nothing; in the future,
915 * it might return some error if it failed.
917 * if no bind took place yet, but the connection is bound
918 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
919 * and explicitly add proxyAuthz the control to every operation
920 * with the dn bound to the connection as control value.
922 * If no server-side controls are defined for the operation,
923 * simply add the proxyAuthz control; otherwise, if the
924 * proxyAuthz control is not already set, add it as
927 * FIXME: is controls order significant for security?
928 * ANSWER: controls ordering and interoperability
929 * must be indicated by the specs of each control; if none
930 * is specified, the order is irrelevant.
933 ldap_back_proxy_authz_ctrl(
937 LDAPControl ***pctrls )
939 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
940 LDAPControl **ctrls = NULL;
943 struct berval assertedID;
947 rs->sr_err = LDAP_SUCCESS;
949 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
950 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) ) {
954 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
958 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
959 if ( op->o_proxy_authz ) {
961 * FIXME: we do not want to perform proxyAuthz
962 * on behalf of the client, because this would
963 * be performed with "proxyauthzdn" privileges.
965 * This might actually be too strict, since
966 * the "proxyauthzdn" authzTo, and each entry's
967 * authzFrom attributes may be crafted
968 * to avoid unwanted proxyAuthz to take place.
971 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
972 rs->sr_text = "proxyAuthz not allowed within namingContext";
977 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
981 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
985 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
989 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
990 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
991 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
993 /* already asserted in SASL via native authz */
994 /* NOTE: the test on lc->lc_bound is used to trap
995 * native authorization of anonymous users,
996 * since in that case op->o_conn->c_ndn is NULL */
1000 } else if ( li->idassert_authz ) {
1002 struct berval authcDN;
1004 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1005 authcDN = slap_empty_bv;
1007 authcDN = op->o_conn->c_ndn;
1009 rc = slap_sasl_matches( op, li->idassert_authz,
1010 &authcDN, & authcDN );
1011 if ( rc != LDAP_SUCCESS ) {
1012 /* op->o_conn->c_ndn is not authorized
1013 * to use idassert */
1018 if ( op->o_proxy_authz ) {
1021 * 1) ignore the already set proxyAuthz control
1022 * 2) leave it in place, and don't set ours
1024 * 4) reject the operation
1026 * option (4) is very drastic
1027 * option (3) will make the remote server reject
1028 * the operation, thus being equivalent to (4)
1029 * option (2) will likely break the idassert
1030 * assumptions, so we cannot accept it;
1031 * option (1) means that we are contradicting
1032 * the client's reques.
1034 * I think (4) is the only correct choice.
1036 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1037 rs->sr_text = "proxyAuthz not allowed within namingContext";
1040 if ( op->o_do_not_cache && op->o_is_auth_check ) {
1041 mode = LDAP_BACK_IDASSERT_NOASSERT;
1044 mode = li->idassert_mode;
1048 case LDAP_BACK_IDASSERT_LEGACY:
1049 case LDAP_BACK_IDASSERT_SELF:
1050 /* original behavior:
1051 * assert the client's identity */
1052 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1053 assertedID = slap_empty_bv;
1055 assertedID = op->o_conn->c_ndn;
1059 case LDAP_BACK_IDASSERT_ANONYMOUS:
1060 /* assert "anonymous" */
1061 assertedID = slap_empty_bv;
1064 case LDAP_BACK_IDASSERT_NOASSERT:
1065 /* don't assert; bind as proxyauthzdn */
1068 case LDAP_BACK_IDASSERT_OTHERID:
1069 case LDAP_BACK_IDASSERT_OTHERDN:
1070 /* assert idassert DN */
1071 assertedID = li->idassert_authzID;
1078 if ( BER_BVISNULL( &assertedID ) ) {
1079 assertedID = slap_empty_bv;
1082 if ( op->o_ctrls ) {
1083 for ( i = 0; op->o_ctrls[ i ]; i++ )
1084 /* just count ctrls */ ;
1087 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1088 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1090 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1091 ctrls[ 0 ]->ldctl_iscritical = 1;
1093 switch ( li->idassert_mode ) {
1094 /* already in u:ID or dn:DN form */
1095 case LDAP_BACK_IDASSERT_OTHERID:
1096 case LDAP_BACK_IDASSERT_OTHERDN:
1097 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1100 /* needs the dn: prefix */
1102 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1103 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1104 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1105 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val + STRLENOF( "dn:" ),
1106 assertedID.bv_val, assertedID.bv_len + 1 );
1110 if ( op->o_ctrls ) {
1111 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1112 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1115 ctrls[ i + 1 ] = NULL;
1118 if ( ctrls == NULL ) {
1119 ctrls = op->o_ctrls;
1128 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1130 LDAPControl **ctrls = *pctrls;
1132 /* we assume that the first control is the proxyAuthz
1133 * added by back-ldap, so it's the only one we explicitly
1135 if ( ctrls && ctrls != op->o_ctrls ) {
1136 assert( ctrls[ 0 ] );
1138 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1139 free( ctrls[ 0 ]->ldctl_value.bv_val );