1 /* bind.c - ldap backend bind function */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 1999-2005 The OpenLDAP Foundation.
6 * Portions Copyright 2000-2003 Pierangelo Masarati.
7 * Portions Copyright 1999-2003 Howard Chu.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted only as authorized by the OpenLDAP
14 * A copy of this license is available in the file LICENSE in the
15 * top-level directory of the distribution or, alternatively, at
16 * <http://www.OpenLDAP.org/license.html>.
19 * This work was initially developed by Howard Chu for inclusion
20 * in OpenLDAP Software and subsequently enhanced by Pierangelo
29 #include <ac/socket.h>
30 #include <ac/string.h>
34 #include "back-ldap.h"
36 #include <lutil_ldap.h>
38 #define PRINT_CONNTREE 0
40 static LDAP_REBIND_PROC ldap_back_rebind;
43 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs );
46 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
49 ldap_back_bind( Operation *op, SlapReply *rs )
51 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
57 lc = ldap_back_getconn( op, rs, LDAP_BACK_SENDERR );
62 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
63 ch_free( lc->lc_bound_ndn.bv_val );
64 BER_BVZERO( &lc->lc_bound_ndn );
68 /* method is always LDAP_AUTH_SIMPLE if we got here */
69 rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
71 &op->orb_cred, op->o_ctrls, NULL, &msgid );
72 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
74 if ( rc == LDAP_SUCCESS ) {
75 /* If defined, proxyAuthz will be used also when
76 * back-ldap is the authorizing backend; for this
77 * purpose, a successful bind is followed by a
78 * bind with the configured identity assertion */
79 /* NOTE: use with care */
80 if ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
81 ldap_back_proxy_authz_bind( lc, op, rs );
82 if ( lc->lc_bound == 0 ) {
89 ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
91 if ( LDAP_BACK_SAVECRED( li ) ) {
92 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
93 memset( lc->lc_cred.bv_val, 0,
96 ber_bvreplace( &lc->lc_cred, &op->orb_cred );
97 ldap_set_rebind_proc( lc->lc_ld, ldap_back_rebind, lc );
102 /* must re-insert if local DN changed as result of bind */
103 if ( lc->lc_bound && !dn_match( &op->o_req_ndn, &lc->lc_local_ndn ) ) {
106 /* wait for all other ops to release the connection */
108 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
109 if ( lc->lc_refcnt > 1 ) {
110 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
111 ldap_pvt_thread_yield();
115 assert( lc->lc_refcnt == 1 );
116 lc = avl_delete( &li->conntree, (caddr_t)lc,
117 ldap_back_conn_cmp );
118 assert( lc != NULL );
120 ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn );
121 lerr = avl_insert( &li->conntree, (caddr_t)lc,
122 ldap_back_conn_cmp, ldap_back_conn_dup );
123 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
125 /* we can do this because lc_refcnt == 1 */
126 ldap_back_conn_free( lc );
132 ldap_back_release_conn( op, rs, lc );
141 * compares two struct ldapconn based on the value of the conn pointer;
145 ldap_back_conn_cmp( const void *c1, const void *c2 )
147 const struct ldapconn *lc1 = (const struct ldapconn *)c1;
148 const struct ldapconn *lc2 = (const struct ldapconn *)c2;
151 /* If local DNs don't match, it is definitely not a match */
152 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
157 /* For shared sessions, conn is NULL. Only explicitly
158 * bound sessions will have non-NULL conn.
160 return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
166 * returns -1 in case a duplicate struct ldapconn has been inserted;
170 ldap_back_conn_dup( void *c1, void *c2 )
172 struct ldapconn *lc1 = (struct ldapconn *)c1;
173 struct ldapconn *lc2 = (struct ldapconn *)c2;
175 /* Cannot have more than one shared session with same DN */
176 if ( dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) &&
177 lc1->lc_conn == lc2->lc_conn )
185 #if PRINT_CONNTREE > 0
187 ravl_print( Avlnode *root, int depth )
196 ravl_print( root->avl_right, depth+1 );
198 for ( i = 0; i < depth; i++ ) {
203 printf( "lc(%lx) local(%s) conn(%lx) %d\n",
204 lc, lc->lc_local_ndn.bv_val, lc->lc_conn, root->avl_bf );
206 ravl_print( root->avl_left, depth+1 );
210 myprint( Avlnode *root )
212 printf( "********\n" );
215 printf( "\tNULL\n" );
218 ravl_print( root, 0 );
221 printf( "********\n" );
223 #endif /* PRINT_CONNTREE */
226 ldap_back_freeconn( Operation *op, struct ldapconn *lc )
228 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
230 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
232 assert( lc->lc_refcnt > 0 );
233 if ( --lc->lc_refcnt == 0 ) {
234 lc = avl_delete( &li->conntree, (caddr_t)lc,
235 ldap_back_conn_cmp );
236 assert( lc != NULL );
238 ldap_back_conn_free( (void *)lc );
241 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
256 int rc = LDAP_SUCCESS;
259 /* this is ridicolous... */
262 /* start TLS ("tls-[try-]{start,propagate}" statements) */
263 if ( ( LDAP_BACK_USE_TLS( &li ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS( &li ) ) )
264 && !ldap_is_ldaps_url( url ) )
266 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
268 * use asynchronous StartTLS
269 * in case, chase referral (not implemented yet)
273 if ( protocol == 0 ) {
274 ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION,
278 if ( protocol < LDAP_VERSION3 ) {
279 protocol = LDAP_VERSION3;
280 /* Set LDAP version */
281 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION,
282 (const void *)&protocol );
285 rc = ldap_start_tls( ld, NULL, NULL, &msgid );
286 if ( rc == LDAP_SUCCESS ) {
287 LDAPMessage *res = NULL;
289 struct timeval tv = { 0, 100000 };
292 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
296 } else if ( rc == 0 ) {
305 } else if ( rc == LDAP_RES_EXTENDED ) {
306 struct berval *data = NULL;
308 rc = ldap_parse_extended_result( ld, res,
310 if ( rc == LDAP_SUCCESS ) {
311 rc = ldap_result2error( ld, res, 1 );
314 /* FIXME: in case a referral
315 * is returned, should we try
316 * using it instead of the
318 if ( rc == LDAP_SUCCESS ) {
319 rc = ldap_install_tls( ld );
321 } else if ( rc == LDAP_REFERRAL ) {
323 *text = "unwilling to chase referral returned by Start TLS exop";
327 if ( data->bv_val ) {
328 ber_memfree( data->bv_val );
342 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
344 * use synchronous StartTLS
346 rc = ldap_start_tls_s( ld, NULL, NULL );
347 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
349 /* if StartTLS is requested, only attempt it if the URL
350 * is not "ldaps://"; this may occur not only in case
351 * of misconfiguration, but also when used in the chain
352 * overlay, where the "uri" can be parsed out of a referral */
358 case LDAP_SERVER_DOWN:
362 if ( LDAP_BACK_TLS_CRITICAL( &li ) ) {
363 *text = "could not start TLS";
367 /* in case Start TLS is not critical */
379 #endif /* HAVE_TLS */
382 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
384 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
385 int vers = op->o_protocol;
388 int is_tls = op->o_conn->c_is_tls;
389 #endif /* HAVE_TLS */
391 assert( lcp != NULL );
393 rs->sr_err = ldap_initialize( &ld, li->url );
394 if ( rs->sr_err != LDAP_SUCCESS ) {
398 /* Set LDAP version. This will always succeed: If the client
399 * bound with a particular version, then so can we.
401 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&vers );
403 /* automatically chase referrals ("[dont-]chase-referrals" statement) */
404 if ( LDAP_BACK_CHASE_REFERRALS( li ) ) {
405 ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
409 rs->sr_err = ldap_back_start_tls( ld,
410 op->o_protocol, &is_tls,
411 li->url, li->flags, &rs->sr_text );
412 if ( rs->sr_err != LDAP_SUCCESS ) {
413 ldap_unbind_ext( ld, NULL, NULL );
416 #endif /* HAVE_TLS */
418 if ( *lcp == NULL ) {
419 *lcp = (struct ldapconn *)ch_calloc( 1, sizeof( struct ldapconn ) );
420 (*lcp)->lc_flags= li->flags;
423 (*lcp)->lc_refcnt = 1;
425 (*lcp)->lc_is_tls = is_tls;
426 #endif /* HAVE_TLS */
429 if ( rs->sr_err != LDAP_SUCCESS ) {
430 rs->sr_err = slap_map_api2result( rs );
431 if ( sendok & LDAP_BACK_SENDERR ) {
432 if ( rs->sr_text == NULL ) {
433 rs->sr_text = "ldap_initialize() failed";
435 send_ldap_result( op, rs );
444 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
446 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
451 /* Searches for a ldapconn in the avl tree */
453 /* Explicit binds must not be shared */
454 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
455 lc_curr.lc_conn = op->o_conn;
459 if ( op->o_conn->c_is_tls ) {
460 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN_TLS;
462 #endif /* HAVE_TLS */
464 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN;
468 /* Internal searches are privileged and shared. So is root. */
469 /* FIXME: there seem to be concurrency issues */
470 if ( op->o_do_not_cache || be_isroot( op ) ) {
471 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
473 if ( op->o_conn->c_is_tls ) {
474 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN_TLS;
476 #endif /* HAVE_TLS */
478 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN;
480 lc_curr.lc_ispriv = 1;
483 lc_curr.lc_local_ndn = op->o_ndn;
486 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
488 lc = (struct ldapconn *)avl_find( li->conntree,
489 (caddr_t)&lc_curr, ldap_back_conn_cmp );
491 refcnt = ++lc->lc_refcnt;
493 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
495 /* Looks like we didn't get a bind. Open a new session... */
497 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
501 lc->lc_conn = lc_curr.lc_conn;
502 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
504 if ( lc_curr.lc_ispriv ) {
505 ber_dupbv( &lc->lc_cred, &li->acl_passwd );
506 ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
507 lc->lc_ispriv = lc_curr.lc_ispriv;
510 BER_BVZERO( &lc->lc_cred );
511 BER_BVZERO( &lc->lc_bound_ndn );
512 if ( !BER_BVISEMPTY( &op->o_ndn )
513 && SLAP_IS_AUTHZ_BACKEND( op ) )
515 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
520 /* if start TLS failed but it was not mandatory,
521 * check if the non-TLS connection was already
522 * in cache; in case, destroy the newly created
523 * connection and use the existing one */
524 if ( lc->lc_conn == LDAP_BACK_PRIV_CONN_TLS
525 && !ldap_tls_inplace( lc->lc_ld ) )
527 struct ldapconn *tmplc;
529 lc_curr.lc_conn = LDAP_BACK_PRIV_CONN;
530 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
531 tmplc = (struct ldapconn *)avl_find( li->conntree,
532 (caddr_t)&lc_curr, ldap_back_conn_cmp );
533 if ( tmplc != NULL ) {
534 refcnt = ++tmplc->lc_refcnt;
535 ldap_back_conn_free( lc );
538 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
540 if ( tmplc != NULL ) {
544 #endif /* HAVE_TLS */
548 /* Inserts the newly created ldapconn in the avl tree */
549 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
551 assert( lc->lc_refcnt == 1 );
552 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
553 ldap_back_conn_cmp, ldap_back_conn_dup );
555 #if PRINT_CONNTREE > 0
556 myprint( li->conntree );
557 #endif /* PRINT_CONNTREE */
559 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
561 Debug( LDAP_DEBUG_TRACE,
562 "=>ldap_back_getconn: conn %p inserted (refcnt=%u)\n",
563 (void *)lc, refcnt, 0 );
565 /* Err could be -1 in case a duplicate ldapconn is inserted */
566 if ( rs->sr_err != 0 ) {
567 ldap_back_conn_free( lc );
568 rs->sr_err = LDAP_OTHER;
569 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
570 send_ldap_error( op, rs, LDAP_OTHER,
571 "internal server error" );
577 Debug( LDAP_DEBUG_TRACE,
578 "=>ldap_back_getconn: conn %p fetched (refcnt=%u)\n",
579 (void *)lc, refcnt, 0 );
587 ldap_back_release_conn(
590 struct ldapconn *lc )
592 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
594 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
595 assert( lc->lc_refcnt > 0 );
597 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
603 * Note: as the check for the value of lc->lc_bound was already here, I removed
604 * it from all the callers, and I made the function return the flag, so
605 * it can be used to simplify the check.
607 * Note: dolock indicates whether li->conn_mutex must be locked or not
610 ldap_back_dobind_int(
614 ldap_back_send_t sendok,
621 assert( retries >= 0 );
623 if ( !lc->lc_bound ) {
624 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
627 * FIXME: we need to let clients use proxyAuthz
628 * otherwise we cannot do symmetric pools of servers;
629 * we have to live with the fact that a user can
630 * authorize itself as any ID that is allowed
631 * by the authzTo directive of the "proxyauthzdn".
634 * NOTE: current Proxy Authorization specification
635 * and implementation do not allow proxy authorization
636 * control to be provided with Bind requests
639 * if no bind took place yet, but the connection is bound
640 * and the "idassert-authcDN" (or other ID) is set,
641 * then bind as the asserting identity and explicitly
642 * add the proxyAuthz control to every operation with the
643 * dn bound to the connection as control value.
644 * This is done also if this is the authrizing backend,
645 * but the "override" flag is given to idassert.
646 * It allows to use SASL bind and yet proxyAuthz users
648 if ( op->o_conn != NULL &&
649 !op->o_do_not_cache &&
650 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
651 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
653 (void)ldap_back_proxy_authz_bind( lc, op, rs );
657 #ifdef HAVE_CYRUS_SASL
658 if ( lc->lc_ispriv && li->acl_authmethod == LDAP_AUTH_SASL ) {
659 void *defaults = NULL;
661 #if 1 /* will deal with this later... */
662 if ( li->acl_secprops != NULL ) {
663 rc = ldap_set_option( lc->lc_ld,
664 LDAP_OPT_X_SASL_SECPROPS, li->acl_secprops);
666 if( rc != LDAP_OPT_SUCCESS ) {
667 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
668 "(%s,SECPROPS,\"%s\") failed!\n",
669 li->url, li->acl_secprops, 0 );
675 defaults = lutil_sasl_defaults( lc->lc_ld,
676 li->acl_sasl_mech.bv_val,
677 li->acl_sasl_realm.bv_val,
678 li->acl_authcID.bv_val,
679 li->acl_passwd.bv_val,
682 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
683 li->acl_authcDN.bv_val,
684 li->acl_sasl_mech.bv_val, NULL, NULL,
685 LDAP_SASL_QUIET, lutil_sasl_interact,
688 lutil_sasl_freedefs( defaults );
690 rs->sr_err = slap_map_api2result( rs );
691 if ( rs->sr_err != LDAP_SUCCESS ) {
693 send_ldap_result( op, rs );
700 #endif /* HAVE_CYRUS_SASL */
703 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
704 lc->lc_bound_ndn.bv_val,
705 LDAP_SASL_SIMPLE, &lc->lc_cred,
706 NULL, NULL, &msgid );
708 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
711 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
714 assert( lc->lc_refcnt > 0 );
715 if ( lc->lc_refcnt == 1 ) {
716 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
719 /* lc here must be the regular lc, reset and ready for init */
720 rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
723 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
725 if ( rs->sr_err == LDAP_SUCCESS ) {
731 ldap_back_freeconn( op, lc );
732 rs->sr_err = slap_map_api2result( rs );
737 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
738 if ( rc == LDAP_SUCCESS ) {
742 ldap_back_release_conn( op, rs, lc );
752 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
754 return ldap_back_dobind_int( lc, op, rs, sendok, 1, 1 );
760 * This is a callback used for chasing referrals using the same
761 * credentials as the original user on this session.
764 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
765 ber_int_t msgid, void *params )
767 struct ldapconn *lc = (struct ldapconn *)params;
770 /* ... otherwise we couldn't get here */
771 assert( lc != NULL );
773 if ( !ldap_tls_inplace( ld ) ) {
774 int is_tls = lc->lc_is_tls,
776 const char *text = NULL;
778 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags, &text );
779 if ( rc != LDAP_SUCCESS ) {
783 #endif /* HAVE_TLS */
785 /* FIXME: add checks on the URL/identity? */
787 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
788 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
797 ldap_back_send_t sendok )
800 LDAPMessage *res = NULL;
803 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
806 rs->sr_matched = NULL;
808 /* if the error recorded in the reply corresponds
809 * to a successful state, get the error from the
810 * remote server response */
811 if ( ERR_OK( rs->sr_err ) ) {
813 struct timeval tv = { 0, 100000 };
816 /* if result parsing fails, note the failure reason */
817 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
820 tv.tv_usec = 100000; /* 0.1 s */
821 ldap_pvt_thread_yield();
825 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
830 /* otherwise get the result; if it is not
831 * LDAP_SUCCESS, record it in the reply
832 * structure (this includes
833 * LDAP_COMPARE_{TRUE|FALSE}) */
835 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
836 &match, &text, NULL, NULL, 1 );
838 if ( rc != LDAP_SUCCESS ) {
844 /* if the error in the reply structure is not
845 * LDAP_SUCCESS, try to map it from client
847 if ( !ERR_OK( rs->sr_err ) ) {
848 rs->sr_err = slap_map_api2result( rs );
850 /* internal ops ( op->o_conn == NULL )
851 * must not reply to client */
852 if ( op->o_conn && !op->o_do_not_cache && match ) {
854 /* record the (massaged) matched
855 * DN into the reply structure */
856 rs->sr_matched = match;
860 ( ( sendok & LDAP_BACK_SENDOK )
861 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
863 send_ldap_result( op, rs );
866 if ( rs->sr_matched != match ) {
867 free( (char *)rs->sr_matched );
869 rs->sr_matched = NULL;
870 ldap_memfree( match );
873 ldap_memfree( text );
876 return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
879 /* return true if bound, false if failed */
881 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
884 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
886 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
888 if ( lc->lc_refcnt == 1 ) {
889 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
893 /* lc here must be the regular lc, reset and ready for init */
894 rc = ldap_back_prepare_conn( &lc, op, rs, sendok );
895 if ( rc == LDAP_SUCCESS ) {
896 rc = ldap_back_dobind_int( lc, op, rs, sendok, 0, 0 );
900 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
906 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
908 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
909 struct berval binddn = slap_empty_bv;
910 struct berval bindcred = slap_empty_bv;
916 * FIXME: we need to let clients use proxyAuthz
917 * otherwise we cannot do symmetric pools of servers;
918 * we have to live with the fact that a user can
919 * authorize itself as any ID that is allowed
920 * by the authzTo directive of the "proxyauthzdn".
923 * NOTE: current Proxy Authorization specification
924 * and implementation do not allow proxy authorization
925 * control to be provided with Bind requests
928 * if no bind took place yet, but the connection is bound
929 * and the "proxyauthzdn" is set, then bind as
930 * "proxyauthzdn" and explicitly add the proxyAuthz
931 * control to every operation with the dn bound
932 * to the connection as control value.
935 /* bind as proxyauthzdn only if no idassert mode
936 * is requested, or if the client's identity
938 switch ( li->idassert_mode ) {
939 case LDAP_BACK_IDASSERT_LEGACY:
940 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
941 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
943 binddn = li->idassert_authcDN;
944 bindcred = li->idassert_passwd;
951 /* NOTE: rootdn can always idassert */
952 if ( li->idassert_authz && !be_isroot( op ) ) {
953 struct berval authcDN;
955 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
956 authcDN = slap_empty_bv;
959 authcDN = op->o_conn->c_ndn;
961 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
962 &authcDN, &authcDN );
963 if ( rs->sr_err != LDAP_SUCCESS ) {
964 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
965 send_ldap_result( op, rs );
969 rs->sr_err = LDAP_SUCCESS;
970 binddn = slap_empty_bv;
971 bindcred = slap_empty_bv;
979 binddn = li->idassert_authcDN;
980 bindcred = li->idassert_passwd;
985 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
986 #ifdef HAVE_CYRUS_SASL
987 void *defaults = NULL;
988 struct berval authzID = BER_BVNULL;
991 /* if SASL supports native authz, prepare for it */
992 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
993 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
995 switch ( li->idassert_mode ) {
996 case LDAP_BACK_IDASSERT_OTHERID:
997 case LDAP_BACK_IDASSERT_OTHERDN:
998 authzID = li->idassert_authzID;
1001 case LDAP_BACK_IDASSERT_ANONYMOUS:
1002 BER_BVSTR( &authzID, "dn:" );
1005 case LDAP_BACK_IDASSERT_SELF:
1006 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1007 /* connection is not authc'd, so don't idassert */
1008 BER_BVSTR( &authzID, "dn:" );
1011 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
1012 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1013 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1014 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1015 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
1024 #if 0 /* will deal with this later... */
1025 if ( sasl_secprops != NULL ) {
1026 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
1027 (void *) sasl_secprops );
1029 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1030 send_ldap_result( op, rs );
1037 defaults = lutil_sasl_defaults( lc->lc_ld,
1038 li->idassert_sasl_mech.bv_val,
1039 li->idassert_sasl_realm.bv_val,
1040 li->idassert_authcID.bv_val,
1041 li->idassert_passwd.bv_val,
1044 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
1045 li->idassert_sasl_mech.bv_val, NULL, NULL,
1046 LDAP_SASL_QUIET, lutil_sasl_interact,
1049 lutil_sasl_freedefs( defaults );
1051 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1054 rs->sr_err = slap_map_api2result( rs );
1055 if ( rs->sr_err != LDAP_SUCCESS ) {
1057 send_ldap_result( op, rs );
1063 #endif /* HAVE_CYRUS_SASL */
1066 switch ( li->idassert_authmethod ) {
1067 case LDAP_AUTH_SIMPLE:
1068 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1069 binddn.bv_val, LDAP_SASL_SIMPLE,
1070 &bindcred, NULL, NULL, &msgid );
1073 case LDAP_AUTH_NONE:
1080 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1081 send_ldap_result( op, rs );
1085 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
1086 if ( rc == LDAP_SUCCESS ) {
1090 return lc->lc_bound;
1094 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
1095 * to existing server-side controls if required; if not,
1096 * the existing server-side controls are placed in *pctrls.
1097 * The caller, after using the controls in client API
1098 * operations, if ( *pctrls != op->o_ctrls ), should
1099 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
1100 * The function returns success if the control could
1101 * be added if required, or if it did nothing; in the future,
1102 * it might return some error if it failed.
1104 * if no bind took place yet, but the connection is bound
1105 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
1106 * and explicitly add proxyAuthz the control to every operation
1107 * with the dn bound to the connection as control value.
1109 * If no server-side controls are defined for the operation,
1110 * simply add the proxyAuthz control; otherwise, if the
1111 * proxyAuthz control is not already set, add it as
1114 * FIXME: is controls order significant for security?
1115 * ANSWER: controls ordering and interoperability
1116 * must be indicated by the specs of each control; if none
1117 * is specified, the order is irrelevant.
1120 ldap_back_proxy_authz_ctrl(
1121 struct ldapconn *lc,
1124 LDAPControl ***pctrls )
1126 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
1127 LDAPControl **ctrls = NULL;
1130 struct berval assertedID;
1134 rs->sr_err = LDAP_SUCCESS;
1136 /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
1137 * but if it is not set this test fails. We need a different
1138 * means to detect if idassert is enabled */
1139 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
1140 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) )
1145 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
1149 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
1150 if ( op->o_proxy_authz ) {
1152 * FIXME: we do not want to perform proxyAuthz
1153 * on behalf of the client, because this would
1154 * be performed with "proxyauthzdn" privileges.
1156 * This might actually be too strict, since
1157 * the "proxyauthzdn" authzTo, and each entry's
1158 * authzFrom attributes may be crafted
1159 * to avoid unwanted proxyAuthz to take place.
1162 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1163 rs->sr_text = "proxyAuthz not allowed within namingContext";
1168 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1172 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1176 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
1180 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
1181 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1182 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
1184 /* already asserted in SASL via native authz */
1185 /* NOTE: the test on lc->lc_bound is used to trap
1186 * native authorization of anonymous users,
1187 * since in that case op->o_conn->c_ndn is NULL */
1191 } else if ( li->idassert_authz && !be_isroot( op ) ) {
1193 struct berval authcDN;
1195 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1196 authcDN = slap_empty_bv;
1198 authcDN = op->o_conn->c_ndn;
1200 rc = slap_sasl_matches( op, li->idassert_authz,
1201 &authcDN, & authcDN );
1202 if ( rc != LDAP_SUCCESS ) {
1203 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
1205 /* op->o_conn->c_ndn is not authorized
1206 * to use idassert */
1213 if ( op->o_proxy_authz ) {
1216 * 1) ignore the already set proxyAuthz control
1217 * 2) leave it in place, and don't set ours
1219 * 4) reject the operation
1221 * option (4) is very drastic
1222 * option (3) will make the remote server reject
1223 * the operation, thus being equivalent to (4)
1224 * option (2) will likely break the idassert
1225 * assumptions, so we cannot accept it;
1226 * option (1) means that we are contradicting
1227 * the client's reques.
1229 * I think (4) is the only correct choice.
1231 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1232 rs->sr_text = "proxyAuthz not allowed within namingContext";
1235 if ( op->o_do_not_cache && op->o_is_auth_check ) {
1236 mode = LDAP_BACK_IDASSERT_NOASSERT;
1239 mode = li->idassert_mode;
1243 case LDAP_BACK_IDASSERT_LEGACY:
1244 case LDAP_BACK_IDASSERT_SELF:
1245 /* original behavior:
1246 * assert the client's identity */
1247 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1248 assertedID = slap_empty_bv;
1250 assertedID = op->o_conn->c_ndn;
1254 case LDAP_BACK_IDASSERT_ANONYMOUS:
1255 /* assert "anonymous" */
1256 assertedID = slap_empty_bv;
1259 case LDAP_BACK_IDASSERT_NOASSERT:
1260 /* don't assert; bind as proxyauthzdn */
1263 case LDAP_BACK_IDASSERT_OTHERID:
1264 case LDAP_BACK_IDASSERT_OTHERDN:
1265 /* assert idassert DN */
1266 assertedID = li->idassert_authzID;
1273 if ( BER_BVISNULL( &assertedID ) ) {
1274 assertedID = slap_empty_bv;
1277 if ( op->o_ctrls ) {
1278 for ( i = 0; op->o_ctrls[ i ]; i++ )
1279 /* just count ctrls */ ;
1282 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1283 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1285 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1286 ctrls[ 0 ]->ldctl_iscritical = 1;
1288 switch ( li->idassert_mode ) {
1289 /* already in u:ID or dn:DN form */
1290 case LDAP_BACK_IDASSERT_OTHERID:
1291 case LDAP_BACK_IDASSERT_OTHERDN:
1292 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1295 /* needs the dn: prefix */
1297 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1298 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1299 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1300 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
1301 assertedID.bv_val, assertedID.bv_len + 1 );
1305 if ( op->o_ctrls ) {
1306 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1307 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1310 ctrls[ i + 1 ] = NULL;
1313 if ( ctrls == NULL ) {
1314 ctrls = op->o_ctrls;
1323 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1325 LDAPControl **ctrls = *pctrls;
1327 /* we assume that the first control is the proxyAuthz
1328 * added by back-ldap, so it's the only one we explicitly
1330 if ( ctrls && ctrls != op->o_ctrls ) {
1331 assert( ctrls[ 0 ] != NULL );
1333 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1334 free( ctrls[ 0 ]->ldctl_value.bv_val );