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,
95 ch_free( lc->lc_cred.bv_val );
97 ber_dupbv( &lc->lc_cred, &op->orb_cred );
98 ldap_set_rebind_proc( lc->lc_ld, ldap_back_rebind, lc );
103 /* must re-insert if local DN changed as result of bind */
104 if ( lc->lc_bound && !dn_match( &op->o_req_ndn, &lc->lc_local_ndn ) ) {
107 /* wait for all other ops to release the connection */
109 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
110 case LDAP_PVT_THREAD_EBUSY:
112 ldap_pvt_thread_yield();
116 if ( lc->lc_refcnt > 1 ) {
117 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
118 ldap_pvt_thread_yield();
124 assert( lc->lc_refcnt == 1 );
125 lc = avl_delete( &li->conntree, (caddr_t)lc,
126 ldap_back_conn_cmp );
127 assert( lc != NULL );
129 if ( !BER_BVISNULL( &lc->lc_local_ndn ) ) {
130 ch_free( lc->lc_local_ndn.bv_val );
132 ber_dupbv( &lc->lc_local_ndn, &op->o_req_ndn );
133 lerr = avl_insert( &li->conntree, (caddr_t)lc,
134 ldap_back_conn_cmp, ldap_back_conn_dup );
135 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
137 /* handle this! (e.g. wait until refcnt goes to 1...) */
138 ldap_back_conn_free( lc );
144 ldap_back_release_conn( op, rs, lc );
153 * compares two struct ldapconn based on the value of the conn pointer;
157 ldap_back_conn_cmp( const void *c1, const void *c2 )
159 const struct ldapconn *lc1 = (const struct ldapconn *)c1;
160 const struct ldapconn *lc2 = (const struct ldapconn *)c2;
163 /* If local DNs don't match, it is definitely not a match */
164 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
169 /* For shared sessions, conn is NULL. Only explicitly
170 * bound sessions will have non-NULL conn.
172 return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
178 * returns -1 in case a duplicate struct ldapconn has been inserted;
182 ldap_back_conn_dup( void *c1, void *c2 )
184 struct ldapconn *lc1 = (struct ldapconn *)c1;
185 struct ldapconn *lc2 = (struct ldapconn *)c2;
187 /* Cannot have more than one shared session with same DN */
188 if ( dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) &&
189 lc1->lc_conn == lc2->lc_conn )
197 #if PRINT_CONNTREE > 0
199 ravl_print( Avlnode *root, int depth )
208 ravl_print( root->avl_right, depth+1 );
210 for ( i = 0; i < depth; i++ ) {
215 printf( "lc(%lx) local(%s) conn(%lx) %d\n",
216 lc, lc->lc_local_ndn.bv_val, lc->lc_conn, root->avl_bf );
218 ravl_print( root->avl_left, depth+1 );
222 myprint( Avlnode *root )
224 printf( "********\n" );
227 printf( "\tNULL\n" );
230 ravl_print( root, 0 );
233 printf( "********\n" );
235 #endif /* PRINT_CONNTREE */
238 ldap_back_freeconn( Operation *op, struct ldapconn *lc )
240 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
244 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
245 case LDAP_PVT_THREAD_EBUSY:
247 ldap_pvt_thread_yield();
254 assert( lc->lc_refcnt > 0 );
255 if ( --lc->lc_refcnt == 0 ) {
256 lc = avl_delete( &li->conntree, (caddr_t)lc,
257 ldap_back_conn_cmp );
258 assert( lc != NULL );
260 ldap_back_conn_free( (void *)lc );
262 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
268 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
270 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
271 int vers = op->o_protocol;
274 assert( lcp != NULL );
276 rs->sr_err = ldap_initialize( &ld, li->url );
277 if ( rs->sr_err != LDAP_SUCCESS ) {
281 /* Set LDAP version. This will always succeed: If the client
282 * bound with a particular version, then so can we.
284 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&vers );
286 /* automatically chase referrals ("[dont-]chase-referrals" statement) */
287 if ( LDAP_BACK_CHASE_REFERRALS( li ) ) {
288 ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
292 /* start TLS ("tls-[try-]{start,propagate}" statements) */
293 if ( ( LDAP_BACK_USE_TLS( li ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( li ) ) )
294 && !ldap_is_ldaps_url( li->url ) )
296 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
298 * use asynchronous StartTLS
299 * in case, chase referral (not implemented yet)
303 rs->sr_err = ldap_start_tls( ld, NULL, NULL, &msgid );
304 if ( rs->sr_err == LDAP_SUCCESS ) {
305 LDAPMessage *res = NULL;
307 struct timeval tv = { 0, 0 };
310 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
312 rs->sr_err = LDAP_OTHER;
314 } else if ( rc == 0 ) {
321 rs->sr_err = LDAP_OTHER;
323 } else if ( rc == LDAP_RES_EXTENDED ) {
324 struct berval *data = NULL;
326 rs->sr_err = ldap_parse_extended_result( ld, res,
328 if ( rs->sr_err == LDAP_SUCCESS ) {
329 rs->sr_err = ldap_result2error( ld, res, 1 );
332 /* FIXME: in case a referral
333 * is returned, should we try
334 * using it instead of the
336 if ( rs->sr_err == LDAP_SUCCESS ) {
337 ldap_install_tls( ld );
339 } else if ( rs->sr_err == LDAP_REFERRAL ) {
340 rs->sr_err = LDAP_OTHER;
341 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
345 if ( data->bv_val ) {
346 ber_memfree( data->bv_val );
353 rs->sr_err = LDAP_OTHER;
360 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
362 * use synchronous StartTLS
364 rs->sr_err = ldap_start_tls_s( ld, NULL, NULL );
365 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
367 /* if StartTLS is requested, only attempt it if the URL
368 * is not "ldaps://"; this may occur not only in case
369 * of misconfiguration, but also when used in the chain
370 * overlay, where the "uri" can be parsed out of a referral */
371 if ( rs->sr_err == LDAP_SERVER_DOWN
372 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( li ) ) )
374 ldap_unbind_ext_s( ld, NULL, NULL );
378 /* in case Start TLS is not critical */
379 rs->sr_err = LDAP_SUCCESS;
381 #endif /* HAVE_TLS */
383 if ( *lcp == NULL ) {
384 *lcp = (struct ldapconn *)ch_malloc( sizeof( struct ldapconn ) );
385 memset( *lcp, 0, sizeof( struct ldapconn ) );
388 (*lcp)->lc_refcnt = 1;
391 if ( rs->sr_err != LDAP_SUCCESS ) {
392 rs->sr_err = slap_map_api2result( rs );
393 if ( sendok & LDAP_BACK_SENDERR ) {
394 if ( rs->sr_text == NULL ) {
395 rs->sr_text = "ldap_initialize() failed";
397 send_ldap_result( op, rs );
406 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
408 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
409 struct ldapconn *lc, lc_curr = { 0 };
411 /* Searches for a ldapconn in the avl tree */
413 /* Explicit binds must not be shared */
414 if ( op->o_tag == LDAP_REQ_BIND
416 && op->o_conn->c_authz_backend
417 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private ) )
419 lc_curr.lc_conn = op->o_conn;
422 lc_curr.lc_conn = NULL;
425 /* Internal searches are privileged and shared. So is root. */
426 if ( op->o_do_not_cache || be_isroot( op ) ) {
427 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
428 lc_curr.lc_conn = NULL;
429 lc_curr.lc_ispriv = 1;
432 lc_curr.lc_local_ndn = op->o_ndn;
436 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
437 case LDAP_PVT_THREAD_EBUSY:
439 ldap_pvt_thread_yield();
446 lc = (struct ldapconn *)avl_find( li->conntree,
447 (caddr_t)&lc_curr, ldap_back_conn_cmp );
451 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
453 /* Looks like we didn't get a bind. Open a new session... */
455 /* lc here must be NULL */
456 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
460 lc->lc_conn = lc_curr.lc_conn;
461 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
463 ldap_pvt_thread_mutex_init( &lc->lc_mutex );
465 if ( lc_curr.lc_ispriv ) {
466 ber_dupbv( &lc->lc_cred, &li->acl_passwd );
467 ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
468 lc->lc_ispriv = lc_curr.lc_ispriv;
471 BER_BVZERO( &lc->lc_cred );
472 BER_BVZERO( &lc->lc_bound_ndn );
473 if ( op->o_conn && !BER_BVISEMPTY( &op->o_ndn )
474 && op->o_bd == op->o_conn->c_authz_backend )
476 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
482 /* Inserts the newly created ldapconn in the avl tree */
484 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
485 case LDAP_PVT_THREAD_EBUSY:
487 ldap_pvt_thread_yield();
494 assert( lc->lc_refcnt == 1 );
495 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
496 ldap_back_conn_cmp, ldap_back_conn_dup );
498 #if PRINT_CONNTREE > 0
499 myprint( li->conntree );
500 #endif /* PRINT_CONNTREE */
502 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
504 Debug( LDAP_DEBUG_TRACE,
505 "=>ldap_back_getconn: conn %p inserted (refcnt=%u)\n",
506 (void *)lc, lc->lc_refcnt, 0 );
508 /* Err could be -1 in case a duplicate ldapconn is inserted */
509 if ( rs->sr_err != 0 ) {
510 ldap_back_conn_free( lc );
511 rs->sr_err = LDAP_OTHER;
512 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
513 send_ldap_error( op, rs, LDAP_OTHER,
514 "internal server error" );
520 Debug( LDAP_DEBUG_TRACE,
521 "=>ldap_back_getconn: conn %p fetched (refcnt=%u)\n",
522 (void *)lc, lc->lc_refcnt, 0 );
529 ldap_back_release_conn(
532 struct ldapconn *lc )
534 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
537 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
538 case LDAP_PVT_THREAD_EBUSY:
540 ldap_pvt_thread_yield();
547 assert( lc->lc_refcnt > 0 );
549 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
555 * Note: as the check for the value of lc->lc_bound was already here, I removed
556 * it from all the callers, and I made the function return the flag, so
557 * it can be used to simplify the check.
560 ldap_back_dobind_int(
564 ldap_back_send_t sendok,
571 assert( retries >= 0 );
573 if ( !lc->lc_bound ) {
574 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
577 * FIXME: we need to let clients use proxyAuthz
578 * otherwise we cannot do symmetric pools of servers;
579 * we have to live with the fact that a user can
580 * authorize itself as any ID that is allowed
581 * by the authzTo directive of the "proxyauthzdn".
584 * NOTE: current Proxy Authorization specification
585 * and implementation do not allow proxy authorization
586 * control to be provided with Bind requests
589 * if no bind took place yet, but the connection is bound
590 * and the "idassert-authcDN" (or other ID) is set,
591 * then bind as the asserting identity and explicitly
592 * add the proxyAuthz control to every operation with the
593 * dn bound to the connection as control value.
594 * This is done also if this is the authrizing backend,
595 * but the "override" flag is given to idassert.
596 * It allows to use SASL bind and yet proxyAuthz users
598 if ( op->o_conn != NULL &&
599 !op->o_do_not_cache &&
600 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
601 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
603 (void)ldap_back_proxy_authz_bind( lc, op, rs );
607 #ifdef HAVE_CYRUS_SASL
608 if ( lc->lc_ispriv && li->acl_authmethod == LDAP_AUTH_SASL ) {
609 void *defaults = NULL;
611 #if 1 /* will deal with this later... */
612 if ( li->acl_secprops != NULL ) {
613 rc = ldap_set_option( lc->lc_ld,
614 LDAP_OPT_X_SASL_SECPROPS, li->acl_secprops);
616 if( rc != LDAP_OPT_SUCCESS ) {
617 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
618 "(%s,SECPROPS,\"%s\") failed!\n",
619 li->url, li->acl_secprops, 0 );
625 defaults = lutil_sasl_defaults( lc->lc_ld,
626 li->acl_sasl_mech.bv_val,
627 li->acl_sasl_realm.bv_val,
628 li->acl_authcID.bv_val,
629 li->acl_passwd.bv_val,
632 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
633 li->acl_authcDN.bv_val,
634 li->acl_sasl_mech.bv_val, NULL, NULL,
635 LDAP_SASL_QUIET, lutil_sasl_interact,
638 lutil_sasl_freedefs( defaults );
640 rs->sr_err = slap_map_api2result( rs );
641 if ( rs->sr_err != LDAP_SUCCESS ) {
643 send_ldap_result( op, rs );
650 #endif /* HAVE_CYRUS_SASL */
653 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
654 lc->lc_bound_ndn.bv_val,
655 LDAP_SASL_SIMPLE, &lc->lc_cred,
656 NULL, NULL, &msgid );
658 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
662 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
663 case LDAP_PVT_THREAD_EBUSY:
665 ldap_pvt_thread_yield();
673 assert( lc->lc_refcnt > 0 );
674 if ( lc->lc_refcnt == 1 ) {
675 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
678 /* lc here must be the regular lc, reset and ready for init */
679 rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
682 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
684 if ( rs->sr_err == LDAP_SUCCESS ) {
690 ldap_back_freeconn( op, lc );
691 rs->sr_err = slap_map_api2result( rs );
696 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
697 if ( rc == LDAP_SUCCESS ) {
708 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
712 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
713 rc = ldap_back_dobind_int( lc, op, rs, sendok, 1, 1 );
714 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
722 * This is a callback used for chasing referrals using the same
723 * credentials as the original user on this session.
726 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
727 ber_int_t msgid, void *params )
729 struct ldapconn *lc = (struct ldapconn *)params;
731 /* FIXME: add checks on the URL/identity? */
733 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
734 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
743 ldap_back_send_t sendok )
746 LDAPMessage *res = NULL;
749 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
752 rs->sr_matched = NULL;
754 /* if the error recorded in the reply corresponds
755 * to a successful state, get the error from the
756 * remote server response */
757 if ( ERR_OK( rs->sr_err ) ) {
759 struct timeval tv = { 0, 0 };
762 /* if result parsing fails, note the failure reason */
763 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
766 tv.tv_usec = 100000; /* 0.1 s */
767 ldap_pvt_thread_yield();
771 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
776 /* otherwise get the result; if it is not
777 * LDAP_SUCCESS, record it in the reply
778 * structure (this includes
779 * LDAP_COMPARE_{TRUE|FALSE}) */
781 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
782 &match, &text, NULL, NULL, 1 );
784 if ( rc != LDAP_SUCCESS ) {
790 /* if the error in the reply structure is not
791 * LDAP_SUCCESS, try to map it from client
793 if ( !ERR_OK( rs->sr_err ) ) {
794 rs->sr_err = slap_map_api2result( rs );
796 /* internal ops ( op->o_conn == NULL )
797 * must not reply to client */
798 if ( op->o_conn && !op->o_do_not_cache && match ) {
800 /* record the (massaged) matched
801 * DN into the reply structure */
802 rs->sr_matched = match;
806 ( ( sendok & LDAP_BACK_SENDOK )
807 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
809 send_ldap_result( op, rs );
812 if ( rs->sr_matched != match ) {
813 free( (char *)rs->sr_matched );
815 rs->sr_matched = NULL;
816 ldap_memfree( match );
819 ldap_memfree( text );
822 return( ERR_OK( rs->sr_err ) ? 0 : -1 );
825 /* return true if bound, false if failed */
827 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
830 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
833 switch ( ldap_pvt_thread_mutex_trylock( &li->conn_mutex ) ) {
834 case LDAP_PVT_THREAD_EBUSY:
836 ldap_pvt_thread_yield();
843 if ( lc->lc_refcnt == 1 ) {
844 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
845 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
849 /* lc here must be the regular lc, reset and ready for init */
850 rc = ldap_back_prepare_conn( &lc, op, rs, sendok );
851 if ( rc == LDAP_SUCCESS ) {
852 rc = ldap_back_dobind_int( lc, op, rs, sendok, 0, 0 );
854 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
857 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
863 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
865 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
866 struct berval binddn = slap_empty_bv;
867 struct berval bindcred = slap_empty_bv;
873 * FIXME: we need to let clients use proxyAuthz
874 * otherwise we cannot do symmetric pools of servers;
875 * we have to live with the fact that a user can
876 * authorize itself as any ID that is allowed
877 * by the authzTo directive of the "proxyauthzdn".
880 * NOTE: current Proxy Authorization specification
881 * and implementation do not allow proxy authorization
882 * control to be provided with Bind requests
885 * if no bind took place yet, but the connection is bound
886 * and the "proxyauthzdn" is set, then bind as
887 * "proxyauthzdn" and explicitly add the proxyAuthz
888 * control to every operation with the dn bound
889 * to the connection as control value.
892 /* bind as proxyauthzdn only if no idassert mode
893 * is requested, or if the client's identity
895 switch ( li->idassert_mode ) {
896 case LDAP_BACK_IDASSERT_LEGACY:
897 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
898 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
900 binddn = li->idassert_authcDN;
901 bindcred = li->idassert_passwd;
908 /* NOTE: rootdn can always idassert */
909 if ( li->idassert_authz && !be_isroot( op ) ) {
910 struct berval authcDN;
912 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
913 authcDN = slap_empty_bv;
916 authcDN = op->o_conn->c_ndn;
918 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
919 &authcDN, &authcDN );
920 if ( rs->sr_err != LDAP_SUCCESS ) {
921 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
922 send_ldap_result( op, rs );
926 rs->sr_err = LDAP_SUCCESS;
927 binddn = slap_empty_bv;
928 bindcred = slap_empty_bv;
936 binddn = li->idassert_authcDN;
937 bindcred = li->idassert_passwd;
942 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
943 #ifdef HAVE_CYRUS_SASL
944 void *defaults = NULL;
945 struct berval authzID = BER_BVNULL;
948 /* if SASL supports native authz, prepare for it */
949 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
950 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
952 switch ( li->idassert_mode ) {
953 case LDAP_BACK_IDASSERT_OTHERID:
954 case LDAP_BACK_IDASSERT_OTHERDN:
955 authzID = li->idassert_authzID;
958 case LDAP_BACK_IDASSERT_ANONYMOUS:
959 BER_BVSTR( &authzID, "dn:" );
962 case LDAP_BACK_IDASSERT_SELF:
963 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
964 /* connection is not authc'd, so don't idassert */
965 BER_BVSTR( &authzID, "dn:" );
968 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
969 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
970 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
971 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
972 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
981 #if 0 /* will deal with this later... */
982 if ( sasl_secprops != NULL ) {
983 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
984 (void *) sasl_secprops );
986 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
987 send_ldap_result( op, rs );
994 defaults = lutil_sasl_defaults( lc->lc_ld,
995 li->idassert_sasl_mech.bv_val,
996 li->idassert_sasl_realm.bv_val,
997 li->idassert_authcID.bv_val,
998 li->idassert_passwd.bv_val,
1001 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
1002 li->idassert_sasl_mech.bv_val, NULL, NULL,
1003 LDAP_SASL_QUIET, lutil_sasl_interact,
1006 lutil_sasl_freedefs( defaults );
1008 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1011 rs->sr_err = slap_map_api2result( rs );
1012 if ( rs->sr_err != LDAP_SUCCESS ) {
1014 send_ldap_result( op, rs );
1020 #endif /* HAVE_CYRUS_SASL */
1023 switch ( li->idassert_authmethod ) {
1024 case LDAP_AUTH_SIMPLE:
1025 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1026 binddn.bv_val, LDAP_SASL_SIMPLE,
1027 &bindcred, NULL, NULL, &msgid );
1030 case LDAP_AUTH_NONE:
1037 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1038 send_ldap_result( op, rs );
1042 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
1043 if ( rc == LDAP_SUCCESS ) {
1047 return lc->lc_bound;
1051 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
1052 * to existing server-side controls if required; if not,
1053 * the existing server-side controls are placed in *pctrls.
1054 * The caller, after using the controls in client API
1055 * operations, if ( *pctrls != op->o_ctrls ), should
1056 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
1057 * The function returns success if the control could
1058 * be added if required, or if it did nothing; in the future,
1059 * it might return some error if it failed.
1061 * if no bind took place yet, but the connection is bound
1062 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
1063 * and explicitly add proxyAuthz the control to every operation
1064 * with the dn bound to the connection as control value.
1066 * If no server-side controls are defined for the operation,
1067 * simply add the proxyAuthz control; otherwise, if the
1068 * proxyAuthz control is not already set, add it as
1071 * FIXME: is controls order significant for security?
1072 * ANSWER: controls ordering and interoperability
1073 * must be indicated by the specs of each control; if none
1074 * is specified, the order is irrelevant.
1077 ldap_back_proxy_authz_ctrl(
1078 struct ldapconn *lc,
1081 LDAPControl ***pctrls )
1083 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
1084 LDAPControl **ctrls = NULL;
1087 struct berval assertedID;
1091 rs->sr_err = LDAP_SUCCESS;
1093 /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
1094 * but if it is not set this test fails. We need a different
1095 * means to detect if idassert is enabled */
1096 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
1097 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) )
1102 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
1106 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
1107 if ( op->o_proxy_authz ) {
1109 * FIXME: we do not want to perform proxyAuthz
1110 * on behalf of the client, because this would
1111 * be performed with "proxyauthzdn" privileges.
1113 * This might actually be too strict, since
1114 * the "proxyauthzdn" authzTo, and each entry's
1115 * authzFrom attributes may be crafted
1116 * to avoid unwanted proxyAuthz to take place.
1119 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1120 rs->sr_text = "proxyAuthz not allowed within namingContext";
1125 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1129 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1133 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
1137 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
1138 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1139 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
1141 /* already asserted in SASL via native authz */
1142 /* NOTE: the test on lc->lc_bound is used to trap
1143 * native authorization of anonymous users,
1144 * since in that case op->o_conn->c_ndn is NULL */
1148 } else if ( li->idassert_authz && !be_isroot( op ) ) {
1150 struct berval authcDN;
1152 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1153 authcDN = slap_empty_bv;
1155 authcDN = op->o_conn->c_ndn;
1157 rc = slap_sasl_matches( op, li->idassert_authz,
1158 &authcDN, & authcDN );
1159 if ( rc != LDAP_SUCCESS ) {
1160 if ( li->idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
1162 /* op->o_conn->c_ndn is not authorized
1163 * to use idassert */
1170 if ( op->o_proxy_authz ) {
1173 * 1) ignore the already set proxyAuthz control
1174 * 2) leave it in place, and don't set ours
1176 * 4) reject the operation
1178 * option (4) is very drastic
1179 * option (3) will make the remote server reject
1180 * the operation, thus being equivalent to (4)
1181 * option (2) will likely break the idassert
1182 * assumptions, so we cannot accept it;
1183 * option (1) means that we are contradicting
1184 * the client's reques.
1186 * I think (4) is the only correct choice.
1188 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1189 rs->sr_text = "proxyAuthz not allowed within namingContext";
1192 if ( op->o_do_not_cache && op->o_is_auth_check ) {
1193 mode = LDAP_BACK_IDASSERT_NOASSERT;
1196 mode = li->idassert_mode;
1200 case LDAP_BACK_IDASSERT_LEGACY:
1201 case LDAP_BACK_IDASSERT_SELF:
1202 /* original behavior:
1203 * assert the client's identity */
1204 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1205 assertedID = slap_empty_bv;
1207 assertedID = op->o_conn->c_ndn;
1211 case LDAP_BACK_IDASSERT_ANONYMOUS:
1212 /* assert "anonymous" */
1213 assertedID = slap_empty_bv;
1216 case LDAP_BACK_IDASSERT_NOASSERT:
1217 /* don't assert; bind as proxyauthzdn */
1220 case LDAP_BACK_IDASSERT_OTHERID:
1221 case LDAP_BACK_IDASSERT_OTHERDN:
1222 /* assert idassert DN */
1223 assertedID = li->idassert_authzID;
1230 if ( BER_BVISNULL( &assertedID ) ) {
1231 assertedID = slap_empty_bv;
1234 if ( op->o_ctrls ) {
1235 for ( i = 0; op->o_ctrls[ i ]; i++ )
1236 /* just count ctrls */ ;
1239 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1240 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1242 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1243 ctrls[ 0 ]->ldctl_iscritical = 1;
1245 switch ( li->idassert_mode ) {
1246 /* already in u:ID or dn:DN form */
1247 case LDAP_BACK_IDASSERT_OTHERID:
1248 case LDAP_BACK_IDASSERT_OTHERDN:
1249 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1252 /* needs the dn: prefix */
1254 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1255 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1256 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1257 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
1258 assertedID.bv_val, assertedID.bv_len + 1 );
1262 if ( op->o_ctrls ) {
1263 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1264 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1267 ctrls[ i + 1 ] = NULL;
1270 if ( ctrls == NULL ) {
1271 ctrls = op->o_ctrls;
1280 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1282 LDAPControl **ctrls = *pctrls;
1284 /* we assume that the first control is the proxyAuthz
1285 * added by back-ldap, so it's the only one we explicitly
1287 if ( ctrls && ctrls != op->o_ctrls ) {
1288 assert( ctrls[ 0 ] != NULL );
1290 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1291 free( ctrls[ 0 ]->ldctl_value.bv_val );