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 ("chase-referrals"/"dont-chase-referrals" statement) */
245 if ( LDAP_BACK_CHASE_REFERRALS( li ) ) {
246 ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
249 /* start TLS ("start-tls"/"try-start-tls" statements) */
250 if ( ( LDAP_BACK_USE_TLS( li ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( li ) ) )
251 && !ldap_is_ldaps_url( li->url ) ) {
257 rc = ldap_start_tls( ld, NULL, NULL, &msgid );
258 if ( rc == LDAP_SUCCESS ) {
259 struct timeval tv = { 0, 0 };
261 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
263 rs->sr_err = LDAP_OTHER;
265 } else if ( rc == 0 ) {
272 rs->sr_err = LDAP_OTHER;
275 if ( rc == LDAP_RES_EXTENDED ) {
276 rc = ldap_parse_result( ld, res,
277 &rs->sr_err, NULL, NULL, NULL, NULL, 1 );
278 if ( rc != LDAP_SUCCESS ) {
281 /* FIXME: in case a referral
282 * is returned, should we try
283 * using it instead of the
285 } else if ( rs->sr_err == LDAP_REFERRAL ) {
286 rs->sr_err = LDAP_OTHER;
287 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
292 rs->sr_err = LDAP_OTHER;
297 /* if StartTLS is requested, only attempt it if the URL
298 * is not "ldaps://"; this may occur not only in case
299 * of misconfiguration, but also when used in the chain
300 * overlay, where the "uri" can be parsed out of a referral */
301 if ( rs->sr_err == LDAP_SERVER_DOWN
302 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( li ) ) )
304 ldap_unbind_ext_s( ld, NULL, NULL );
309 if ( *lcp == NULL ) {
310 *lcp = (struct ldapconn *)ch_malloc( sizeof( struct ldapconn ) );
311 memset( *lcp, 0, sizeof( struct ldapconn ) );
316 if ( rs->sr_err != LDAP_SUCCESS ) {
317 rs->sr_err = slap_map_api2result( rs );
318 if ( sendok & LDAP_BACK_SENDERR ) {
319 if ( rs->sr_text == NULL ) {
320 rs->sr_text = "ldap_initialize() failed";
322 send_ldap_result( op, rs );
331 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
333 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
334 struct ldapconn *lc, lc_curr;
337 /* Searches for a ldapconn in the avl tree */
339 /* Explicit binds must not be shared */
340 if ( op->o_tag == LDAP_REQ_BIND
342 && op->o_conn->c_authz_backend
343 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private ) )
345 lc_curr.lc_conn = op->o_conn;
348 lc_curr.lc_conn = NULL;
351 /* Internal searches are privileged and shared. So is root. */
352 if ( op->o_do_not_cache || be_isroot( op ) ) {
353 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
354 lc_curr.lc_conn = NULL;
358 lc_curr.lc_local_ndn = op->o_ndn;
361 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
362 lc = (struct ldapconn *)avl_find( li->conntree,
363 (caddr_t)&lc_curr, ldap_back_conn_cmp );
364 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
366 /* Looks like we didn't get a bind. Open a new session... */
368 /* lc here must be NULL */
369 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
373 lc->lc_conn = lc_curr.lc_conn;
374 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
376 ldap_pvt_thread_mutex_init( &lc->lc_mutex );
379 ber_dupbv( &lc->lc_cred, &li->acl_passwd );
380 ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
383 BER_BVZERO( &lc->lc_cred );
384 BER_BVZERO( &lc->lc_bound_ndn );
385 if ( op->o_conn && !BER_BVISEMPTY( &op->o_ndn )
386 && op->o_bd == op->o_conn->c_authz_backend )
388 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
394 /* Inserts the newly created ldapconn in the avl tree */
395 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
396 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
397 ldap_back_conn_cmp, ldap_back_conn_dup );
399 #if PRINT_CONNTREE > 0
400 myprint( li->conntree );
401 #endif /* PRINT_CONNTREE */
403 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
405 Debug( LDAP_DEBUG_TRACE,
406 "=>ldap_back_getconn: conn %p inserted\n", (void *) lc, 0, 0 );
408 /* Err could be -1 in case a duplicate ldapconn is inserted */
409 if ( rs->sr_err != 0 ) {
410 ldap_back_conn_free( lc );
411 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
412 send_ldap_error( op, rs, LDAP_OTHER,
413 "internal server error" );
418 Debug( LDAP_DEBUG_TRACE,
419 "=>ldap_back_getconn: conn %p fetched\n", (void *) lc, 0, 0 );
428 * Note: as the check for the value of lc->lc_bound was already here, I removed
429 * it from all the callers, and I made the function return the flag, so
430 * it can be used to simplify the check.
433 ldap_back_dobind_int(
437 ldap_back_send_t sendok,
443 assert( retries >= 0 );
445 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
446 if ( !lc->lc_bound ) {
447 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
450 * FIXME: we need to let clients use proxyAuthz
451 * otherwise we cannot do symmetric pools of servers;
452 * we have to live with the fact that a user can
453 * authorize itself as any ID that is allowed
454 * by the authzTo directive of the "proxyauthzdn".
457 * NOTE: current Proxy Authorization specification
458 * and implementation do not allow proxy authorization
459 * control to be provided with Bind requests
462 * if no bind took place yet, but the connection is bound
463 * and the "idassert-authcDN" (or other ID) is set,
464 * then bind as the asserting identity and explicitly
465 * add the proxyAuthz control to every operation with the
466 * dn bound to the connection as control value.
467 * This is done also if this is the authrizing backend,
468 * but the "override" flag is given to idassert.
469 * It allows to use SASL bind and yet proxyAuthz users
471 if ( op->o_conn != NULL &&
472 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
473 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
475 (void)ldap_back_proxy_authz_bind( lc, op, rs );
480 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
481 lc->lc_bound_ndn.bv_val,
482 LDAP_SASL_SIMPLE, &lc->lc_cred,
483 NULL, NULL, &msgid );
485 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
487 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
490 /* lc here must be the regular lc, reset and ready for init */
491 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
499 ldap_back_freeconn( op, lc );
500 rs->sr_err = slap_map_api2result( rs );
505 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
506 if ( rc == LDAP_SUCCESS ) {
513 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
518 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
520 return ldap_back_dobind_int( lc, op, rs, sendok, 1 );
526 * This is a callback used for chasing referrals using the same
527 * credentials as the original user on this session.
530 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
531 ber_int_t msgid, void *params )
533 struct ldapconn *lc = (struct ldapconn *)params;
535 /* FIXME: add checks on the URL/identity? */
537 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
538 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
547 ldap_back_send_t sendok )
550 LDAPMessage *res = NULL;
553 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
556 rs->sr_matched = NULL;
558 /* if the error recorded in the reply corresponds
559 * to a successful state, get the error from the
560 * remote server response */
561 if ( ERR_OK( rs->sr_err ) ) {
563 struct timeval tv = { 0, 0 };
566 /* if result parsing fails, note the failure reason */
567 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
570 tv.tv_usec = 100000; /* 0.1 s */
571 ldap_pvt_thread_yield();
575 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
580 /* otherwise get the result; if it is not
581 * LDAP_SUCCESS, record it in the reply
582 * structure (this includes
583 * LDAP_COMPARE_{TRUE|FALSE}) */
585 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
586 &match, &text, NULL, NULL, 1 );
588 if ( rc != LDAP_SUCCESS ) {
594 /* if the error in the reply structure is not
595 * LDAP_SUCCESS, try to map it from client
597 if ( !ERR_OK( rs->sr_err ) ) {
598 rs->sr_err = slap_map_api2result( rs );
600 /* internal ops ( op->o_conn == NULL )
601 * must not reply to client */
602 if ( op->o_conn && !op->o_do_not_cache && match ) {
604 /* record the (massaged) matched
605 * DN into the reply structure */
606 rs->sr_matched = match;
610 ( ( sendok & LDAP_BACK_SENDOK )
611 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
613 send_ldap_result( op, rs );
616 if ( rs->sr_matched != match ) {
617 free( (char *)rs->sr_matched );
619 rs->sr_matched = NULL;
620 ldap_memfree( match );
623 ldap_memfree( text );
626 return( ERR_OK( rs->sr_err ) ? 0 : -1 );
629 /* return true if bound, false if failed */
631 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
633 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
634 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
638 /* lc here must be the regular lc, reset and ready for init */
639 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
643 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
644 return ldap_back_dobind_int( lc, op, rs, sendok, 0 );
648 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
650 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
651 struct berval binddn = slap_empty_bv;
652 struct berval bindcred = slap_empty_bv;
658 * FIXME: we need to let clients use proxyAuthz
659 * otherwise we cannot do symmetric pools of servers;
660 * we have to live with the fact that a user can
661 * authorize itself as any ID that is allowed
662 * by the authzTo directive of the "proxyauthzdn".
665 * NOTE: current Proxy Authorization specification
666 * and implementation do not allow proxy authorization
667 * control to be provided with Bind requests
670 * if no bind took place yet, but the connection is bound
671 * and the "proxyauthzdn" is set, then bind as
672 * "proxyauthzdn" and explicitly add the proxyAuthz
673 * control to every operation with the dn bound
674 * to the connection as control value.
677 /* bind as proxyauthzdn only if no idassert mode
678 * is requested, or if the client's identity
680 switch ( li->idassert_mode ) {
681 case LDAP_BACK_IDASSERT_LEGACY:
682 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
683 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
685 binddn = li->idassert_authcDN;
686 bindcred = li->idassert_passwd;
693 if ( li->idassert_authz ) {
694 struct berval authcDN;
696 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
697 authcDN = slap_empty_bv;
699 authcDN = op->o_conn->c_ndn;
701 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
702 &authcDN, &authcDN );
703 if ( rs->sr_err != LDAP_SUCCESS ) {
704 send_ldap_result( op, rs );
710 binddn = li->idassert_authcDN;
711 bindcred = li->idassert_passwd;
716 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
717 #ifdef HAVE_CYRUS_SASL
718 void *defaults = NULL;
719 struct berval authzID = BER_BVNULL;
722 /* if SASL supports native authz, prepare for it */
723 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
724 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
726 switch ( li->idassert_mode ) {
727 case LDAP_BACK_IDASSERT_OTHERID:
728 case LDAP_BACK_IDASSERT_OTHERDN:
729 authzID = li->idassert_authzID;
732 case LDAP_BACK_IDASSERT_ANONYMOUS:
733 BER_BVSTR( &authzID, "dn:" );
736 case LDAP_BACK_IDASSERT_SELF:
737 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
738 /* connection is not authc'd, so don't idassert */
739 BER_BVSTR( &authzID, "dn:" );
742 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
743 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
744 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
745 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
746 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
755 #if 0 /* will deal with this later... */
756 if ( sasl_secprops != NULL ) {
757 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
758 (void *) sasl_secprops );
760 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
761 send_ldap_result( op, rs );
768 defaults = lutil_sasl_defaults( lc->lc_ld,
769 li->idassert_sasl_mech.bv_val,
770 li->idassert_sasl_realm.bv_val,
771 li->idassert_authcID.bv_val,
772 li->idassert_passwd.bv_val,
775 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
776 li->idassert_sasl_mech.bv_val, NULL, NULL,
777 li->idassert_sasl_flags, lutil_sasl_interact,
780 lutil_sasl_freedefs( defaults );
782 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
785 rs->sr_err = slap_map_api2result( rs );
786 if ( rs->sr_err != LDAP_SUCCESS ) {
788 send_ldap_result( op, rs );
794 #endif /* HAVE_CYRUS_SASL */
797 switch ( li->idassert_authmethod ) {
798 case LDAP_AUTH_SIMPLE:
799 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
800 binddn.bv_val, LDAP_SASL_SIMPLE,
801 &bindcred, NULL, NULL, &msgid );
811 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
812 send_ldap_result( op, rs );
816 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
817 if ( rc == LDAP_SUCCESS ) {
825 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
826 * to existing server-side controls if required; if not,
827 * the existing server-side controls are placed in *pctrls.
828 * The caller, after using the controls in client API
829 * operations, if ( *pctrls != op->o_ctrls ), should
830 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
831 * The function returns success if the control could
832 * be added if required, or if it did nothing; in the future,
833 * it might return some error if it failed.
835 * if no bind took place yet, but the connection is bound
836 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
837 * and explicitly add proxyAuthz the control to every operation
838 * with the dn bound to the connection as control value.
840 * If no server-side controls are defined for the operation,
841 * simply add the proxyAuthz control; otherwise, if the
842 * proxyAuthz control is not already set, add it as
843 * the first one (FIXME: is controls order significant
847 ldap_back_proxy_authz_ctrl(
851 LDAPControl ***pctrls )
853 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
854 LDAPControl **ctrls = NULL;
857 struct berval assertedID;
861 rs->sr_err = LDAP_SUCCESS;
863 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
864 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) ) {
872 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
873 if ( op->o_proxy_authz ) {
875 * FIXME: we do not want to perform proxyAuthz
876 * on behalf of the client, because this would
877 * be performed with "proxyauthzdn" privileges.
879 * This might actually be too strict, since
880 * the "proxyauthzdn" authzTo, and each entry's
881 * authzFrom attributes may be crafted
882 * to avoid unwanted proxyAuthz to take place.
885 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
886 rs->sr_text = "proxyAuthz not allowed within namingContext";
891 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
895 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
899 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
903 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
904 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
905 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
907 /* already asserted in SASL via native authz */
908 /* NOTE: the test on lc->lc_bound is used to trap
909 * native authorization of anonymous users,
910 * since in that case op->o_conn->c_ndn is NULL */
914 } else if ( li->idassert_authz ) {
916 struct berval authcDN;
918 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
919 authcDN = slap_empty_bv;
921 authcDN = op->o_conn->c_ndn;
923 rc = slap_sasl_matches( op, li->idassert_authz,
924 &authcDN, & authcDN );
925 if ( rc != LDAP_SUCCESS ) {
926 /* op->o_conn->c_ndn is not authorized
932 if ( op->o_proxy_authz ) {
935 * 1) ignore the already set proxyAuthz control
936 * 2) leave it in place, and don't set ours
938 * 4) reject the operation
940 * option (4) is very drastic
941 * option (3) will make the remote server reject
942 * the operation, thus being equivalent to (4)
943 * option (2) will likely break the idassert
944 * assumptions, so we cannot accept it;
945 * option (1) means that we are contradicting
946 * the client's reques.
948 * I think (4) is the only correct choice.
950 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
951 rs->sr_text = "proxyAuthz not allowed within namingContext";
954 if ( op->o_do_not_cache && op->o_is_auth_check ) {
955 mode = LDAP_BACK_IDASSERT_NOASSERT;
958 mode = li->idassert_mode;
962 case LDAP_BACK_IDASSERT_LEGACY:
963 case LDAP_BACK_IDASSERT_SELF:
964 /* original behavior:
965 * assert the client's identity */
966 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
967 assertedID = slap_empty_bv;
969 assertedID = op->o_conn->c_ndn;
973 case LDAP_BACK_IDASSERT_ANONYMOUS:
974 /* assert "anonymous" */
975 assertedID = slap_empty_bv;
978 case LDAP_BACK_IDASSERT_NOASSERT:
979 /* don't assert; bind as proxyauthzdn */
982 case LDAP_BACK_IDASSERT_OTHERID:
983 case LDAP_BACK_IDASSERT_OTHERDN:
984 /* assert idassert DN */
985 assertedID = li->idassert_authzID;
992 if ( BER_BVISNULL( &assertedID ) ) {
993 assertedID = slap_empty_bv;
997 for ( i = 0; op->o_ctrls[ i ]; i++ )
998 /* just count ctrls */ ;
1001 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1002 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1004 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1005 ctrls[ 0 ]->ldctl_iscritical = 1;
1007 switch ( li->idassert_mode ) {
1008 /* already in u:ID or dn:DN form */
1009 case LDAP_BACK_IDASSERT_OTHERID:
1010 case LDAP_BACK_IDASSERT_OTHERDN:
1011 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1014 /* needs the dn: prefix */
1016 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1017 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1018 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1019 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val + STRLENOF( "dn:" ),
1020 assertedID.bv_val, assertedID.bv_len + 1 );
1024 if ( op->o_ctrls ) {
1025 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1026 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1029 ctrls[ i + 1 ] = NULL;
1032 if ( ctrls == NULL ) {
1033 ctrls = op->o_ctrls;
1042 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1044 LDAPControl **ctrls = *pctrls;
1046 /* we assume that the first control is the proxyAuthz
1047 * added by back-ldap, so it's the only one we explicitly
1049 if ( ctrls && ctrls != op->o_ctrls ) {
1050 assert( ctrls[ 0 ] );
1052 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1053 free( ctrls[ 0 ]->ldctl_value.bv_val );