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 1 /* will deal with this later... */
514 if ( li->acl_secprops != NULL ) {
515 rc = ldap_set_option( lc->lc_ld,
516 LDAP_OPT_X_SASL_SECPROPS, li->acl_secprops);
518 if( rc != LDAP_OPT_SUCCESS ) {
519 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
520 "(%s,SECPROPS,\"%s\") failed!\n",
521 li->url, li->acl_secprops, 0 );
527 defaults = lutil_sasl_defaults( lc->lc_ld,
528 li->acl_sasl_mech.bv_val,
529 li->acl_sasl_realm.bv_val,
530 li->acl_authcID.bv_val,
531 li->acl_passwd.bv_val,
534 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
535 li->acl_authcDN.bv_val,
536 li->acl_sasl_mech.bv_val, NULL, NULL,
537 LDAP_SASL_QUIET, lutil_sasl_interact,
540 lutil_sasl_freedefs( defaults );
542 rs->sr_err = slap_map_api2result( rs );
543 if ( rs->sr_err != LDAP_SUCCESS ) {
545 send_ldap_result( op, rs );
552 #endif /* HAVE_CYRUS_SASL */
555 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
556 lc->lc_bound_ndn.bv_val,
557 LDAP_SASL_SIMPLE, &lc->lc_cred,
558 NULL, NULL, &msgid );
560 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
562 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
565 /* lc here must be the regular lc, reset and ready for init */
566 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
574 ldap_back_freeconn( op, lc );
575 rs->sr_err = slap_map_api2result( rs );
580 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
581 if ( rc == LDAP_SUCCESS ) {
592 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
596 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
597 rc = ldap_back_dobind_int( lc, op, rs, sendok, 1 );
598 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
606 * This is a callback used for chasing referrals using the same
607 * credentials as the original user on this session.
610 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
611 ber_int_t msgid, void *params )
613 struct ldapconn *lc = (struct ldapconn *)params;
615 /* FIXME: add checks on the URL/identity? */
617 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
618 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
627 ldap_back_send_t sendok )
630 LDAPMessage *res = NULL;
633 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
636 rs->sr_matched = NULL;
638 /* if the error recorded in the reply corresponds
639 * to a successful state, get the error from the
640 * remote server response */
641 if ( ERR_OK( rs->sr_err ) ) {
643 struct timeval tv = { 0, 0 };
646 /* if result parsing fails, note the failure reason */
647 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
650 tv.tv_usec = 100000; /* 0.1 s */
651 ldap_pvt_thread_yield();
655 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
660 /* otherwise get the result; if it is not
661 * LDAP_SUCCESS, record it in the reply
662 * structure (this includes
663 * LDAP_COMPARE_{TRUE|FALSE}) */
665 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
666 &match, &text, NULL, NULL, 1 );
668 if ( rc != LDAP_SUCCESS ) {
674 /* if the error in the reply structure is not
675 * LDAP_SUCCESS, try to map it from client
677 if ( !ERR_OK( rs->sr_err ) ) {
678 rs->sr_err = slap_map_api2result( rs );
680 /* internal ops ( op->o_conn == NULL )
681 * must not reply to client */
682 if ( op->o_conn && !op->o_do_not_cache && match ) {
684 /* record the (massaged) matched
685 * DN into the reply structure */
686 rs->sr_matched = match;
690 ( ( sendok & LDAP_BACK_SENDOK )
691 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
693 send_ldap_result( op, rs );
696 if ( rs->sr_matched != match ) {
697 free( (char *)rs->sr_matched );
699 rs->sr_matched = NULL;
700 ldap_memfree( match );
703 ldap_memfree( text );
706 return( ERR_OK( rs->sr_err ) ? 0 : -1 );
709 /* return true if bound, false if failed */
711 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
715 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
716 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
720 /* lc here must be the regular lc, reset and ready for init */
721 rc = ldap_back_prepare_conn( &lc, op, rs, sendok );
722 if ( rc == LDAP_SUCCESS ) {
723 rc = ldap_back_dobind_int( lc, op, rs, sendok, 0 );
725 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
731 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
733 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
734 struct berval binddn = slap_empty_bv;
735 struct berval bindcred = slap_empty_bv;
741 * FIXME: we need to let clients use proxyAuthz
742 * otherwise we cannot do symmetric pools of servers;
743 * we have to live with the fact that a user can
744 * authorize itself as any ID that is allowed
745 * by the authzTo directive of the "proxyauthzdn".
748 * NOTE: current Proxy Authorization specification
749 * and implementation do not allow proxy authorization
750 * control to be provided with Bind requests
753 * if no bind took place yet, but the connection is bound
754 * and the "proxyauthzdn" is set, then bind as
755 * "proxyauthzdn" and explicitly add the proxyAuthz
756 * control to every operation with the dn bound
757 * to the connection as control value.
760 /* bind as proxyauthzdn only if no idassert mode
761 * is requested, or if the client's identity
763 switch ( li->idassert_mode ) {
764 case LDAP_BACK_IDASSERT_LEGACY:
765 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
766 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
768 binddn = li->idassert_authcDN;
769 bindcred = li->idassert_passwd;
776 if ( li->idassert_authz ) {
777 struct berval authcDN;
779 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
780 authcDN = slap_empty_bv;
782 authcDN = op->o_conn->c_ndn;
784 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
785 &authcDN, &authcDN );
786 if ( rs->sr_err != LDAP_SUCCESS ) {
787 send_ldap_result( op, rs );
793 binddn = li->idassert_authcDN;
794 bindcred = li->idassert_passwd;
799 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
800 #ifdef HAVE_CYRUS_SASL
801 void *defaults = NULL;
802 struct berval authzID = BER_BVNULL;
805 /* if SASL supports native authz, prepare for it */
806 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
807 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
809 switch ( li->idassert_mode ) {
810 case LDAP_BACK_IDASSERT_OTHERID:
811 case LDAP_BACK_IDASSERT_OTHERDN:
812 authzID = li->idassert_authzID;
815 case LDAP_BACK_IDASSERT_ANONYMOUS:
816 BER_BVSTR( &authzID, "dn:" );
819 case LDAP_BACK_IDASSERT_SELF:
820 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
821 /* connection is not authc'd, so don't idassert */
822 BER_BVSTR( &authzID, "dn:" );
825 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
826 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
827 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
828 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
829 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
838 #if 0 /* will deal with this later... */
839 if ( sasl_secprops != NULL ) {
840 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
841 (void *) sasl_secprops );
843 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
844 send_ldap_result( op, rs );
851 defaults = lutil_sasl_defaults( lc->lc_ld,
852 li->idassert_sasl_mech.bv_val,
853 li->idassert_sasl_realm.bv_val,
854 li->idassert_authcID.bv_val,
855 li->idassert_passwd.bv_val,
858 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
859 li->idassert_sasl_mech.bv_val, NULL, NULL,
860 LDAP_SASL_QUIET, lutil_sasl_interact,
863 lutil_sasl_freedefs( defaults );
865 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
868 rs->sr_err = slap_map_api2result( rs );
869 if ( rs->sr_err != LDAP_SUCCESS ) {
871 send_ldap_result( op, rs );
877 #endif /* HAVE_CYRUS_SASL */
880 switch ( li->idassert_authmethod ) {
881 case LDAP_AUTH_SIMPLE:
882 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
883 binddn.bv_val, LDAP_SASL_SIMPLE,
884 &bindcred, NULL, NULL, &msgid );
894 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
895 send_ldap_result( op, rs );
899 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
900 if ( rc == LDAP_SUCCESS ) {
908 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
909 * to existing server-side controls if required; if not,
910 * the existing server-side controls are placed in *pctrls.
911 * The caller, after using the controls in client API
912 * operations, if ( *pctrls != op->o_ctrls ), should
913 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
914 * The function returns success if the control could
915 * be added if required, or if it did nothing; in the future,
916 * it might return some error if it failed.
918 * if no bind took place yet, but the connection is bound
919 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
920 * and explicitly add proxyAuthz the control to every operation
921 * with the dn bound to the connection as control value.
923 * If no server-side controls are defined for the operation,
924 * simply add the proxyAuthz control; otherwise, if the
925 * proxyAuthz control is not already set, add it as
928 * FIXME: is controls order significant for security?
929 * ANSWER: controls ordering and interoperability
930 * must be indicated by the specs of each control; if none
931 * is specified, the order is irrelevant.
934 ldap_back_proxy_authz_ctrl(
938 LDAPControl ***pctrls )
940 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
941 LDAPControl **ctrls = NULL;
944 struct berval assertedID;
948 rs->sr_err = LDAP_SUCCESS;
950 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
951 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) ) {
955 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
959 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
960 if ( op->o_proxy_authz ) {
962 * FIXME: we do not want to perform proxyAuthz
963 * on behalf of the client, because this would
964 * be performed with "proxyauthzdn" privileges.
966 * This might actually be too strict, since
967 * the "proxyauthzdn" authzTo, and each entry's
968 * authzFrom attributes may be crafted
969 * to avoid unwanted proxyAuthz to take place.
972 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
973 rs->sr_text = "proxyAuthz not allowed within namingContext";
978 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
982 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
986 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
990 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
991 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
992 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
994 /* already asserted in SASL via native authz */
995 /* NOTE: the test on lc->lc_bound is used to trap
996 * native authorization of anonymous users,
997 * since in that case op->o_conn->c_ndn is NULL */
1001 } else if ( li->idassert_authz ) {
1003 struct berval authcDN;
1005 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1006 authcDN = slap_empty_bv;
1008 authcDN = op->o_conn->c_ndn;
1010 rc = slap_sasl_matches( op, li->idassert_authz,
1011 &authcDN, & authcDN );
1012 if ( rc != LDAP_SUCCESS ) {
1013 /* op->o_conn->c_ndn is not authorized
1014 * to use idassert */
1019 if ( op->o_proxy_authz ) {
1022 * 1) ignore the already set proxyAuthz control
1023 * 2) leave it in place, and don't set ours
1025 * 4) reject the operation
1027 * option (4) is very drastic
1028 * option (3) will make the remote server reject
1029 * the operation, thus being equivalent to (4)
1030 * option (2) will likely break the idassert
1031 * assumptions, so we cannot accept it;
1032 * option (1) means that we are contradicting
1033 * the client's reques.
1035 * I think (4) is the only correct choice.
1037 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1038 rs->sr_text = "proxyAuthz not allowed within namingContext";
1041 if ( op->o_do_not_cache && op->o_is_auth_check ) {
1042 mode = LDAP_BACK_IDASSERT_NOASSERT;
1045 mode = li->idassert_mode;
1049 case LDAP_BACK_IDASSERT_LEGACY:
1050 case LDAP_BACK_IDASSERT_SELF:
1051 /* original behavior:
1052 * assert the client's identity */
1053 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1054 assertedID = slap_empty_bv;
1056 assertedID = op->o_conn->c_ndn;
1060 case LDAP_BACK_IDASSERT_ANONYMOUS:
1061 /* assert "anonymous" */
1062 assertedID = slap_empty_bv;
1065 case LDAP_BACK_IDASSERT_NOASSERT:
1066 /* don't assert; bind as proxyauthzdn */
1069 case LDAP_BACK_IDASSERT_OTHERID:
1070 case LDAP_BACK_IDASSERT_OTHERDN:
1071 /* assert idassert DN */
1072 assertedID = li->idassert_authzID;
1079 if ( BER_BVISNULL( &assertedID ) ) {
1080 assertedID = slap_empty_bv;
1083 if ( op->o_ctrls ) {
1084 for ( i = 0; op->o_ctrls[ i ]; i++ )
1085 /* just count ctrls */ ;
1088 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1089 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1091 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1092 ctrls[ 0 ]->ldctl_iscritical = 1;
1094 switch ( li->idassert_mode ) {
1095 /* already in u:ID or dn:DN form */
1096 case LDAP_BACK_IDASSERT_OTHERID:
1097 case LDAP_BACK_IDASSERT_OTHERDN:
1098 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1101 /* needs the dn: prefix */
1103 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1104 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1105 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1106 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val + STRLENOF( "dn:" ),
1107 assertedID.bv_val, assertedID.bv_len + 1 );
1111 if ( op->o_ctrls ) {
1112 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1113 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1116 ctrls[ i + 1 ] = NULL;
1119 if ( ctrls == NULL ) {
1120 ctrls = op->o_ctrls;
1129 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1131 LDAPControl **ctrls = *pctrls;
1133 /* we assume that the first control is the proxyAuthz
1134 * added by back-ldap, so it's the only one we explicitly
1136 if ( ctrls && ctrls != op->o_ctrls ) {
1137 assert( ctrls[ 0 ] );
1139 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1140 free( ctrls[ 0 ]->ldctl_value.bv_val );