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 );
250 /* start TLS ("start-tls"/"try-start-tls" 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 ) ) {
258 rc = ldap_start_tls( ld, NULL, NULL, &msgid );
259 if ( rc == LDAP_SUCCESS ) {
260 struct timeval tv = { 0, 0 };
263 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
265 rs->sr_err = LDAP_OTHER;
267 } else if ( rc == 0 ) {
274 rs->sr_err = LDAP_OTHER;
277 if ( rc == LDAP_RES_EXTENDED ) {
278 rc = ldap_parse_result( ld, res,
279 &rs->sr_err, NULL, NULL, NULL, NULL, 1 );
280 if ( rc != LDAP_SUCCESS ) {
283 /* FIXME: in case a referral
284 * is returned, should we try
285 * using it instead of the
287 } else if ( rs->sr_err == LDAP_REFERRAL ) {
288 rs->sr_err = LDAP_OTHER;
289 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
294 rs->sr_err = LDAP_OTHER;
301 rs->sr_err = ldap_start_tls_s( ld, NULL, NULL );
303 /* if StartTLS is requested, only attempt it if the URL
304 * is not "ldaps://"; this may occur not only in case
305 * of misconfiguration, but also when used in the chain
306 * overlay, where the "uri" can be parsed out of a referral */
307 if ( rs->sr_err == LDAP_SERVER_DOWN
308 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( li ) ) )
310 ldap_unbind_ext_s( ld, NULL, NULL );
316 if ( *lcp == NULL ) {
317 *lcp = (struct ldapconn *)ch_malloc( sizeof( struct ldapconn ) );
318 memset( *lcp, 0, sizeof( struct ldapconn ) );
323 if ( rs->sr_err != LDAP_SUCCESS ) {
324 rs->sr_err = slap_map_api2result( rs );
325 if ( sendok & LDAP_BACK_SENDERR ) {
326 if ( rs->sr_text == NULL ) {
327 rs->sr_text = "ldap_initialize() failed";
329 send_ldap_result( op, rs );
338 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
340 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
341 struct ldapconn *lc, lc_curr;
344 /* Searches for a ldapconn in the avl tree */
346 /* Explicit binds must not be shared */
347 if ( op->o_tag == LDAP_REQ_BIND
349 && op->o_conn->c_authz_backend
350 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private ) )
352 lc_curr.lc_conn = op->o_conn;
355 lc_curr.lc_conn = NULL;
358 /* Internal searches are privileged and shared. So is root. */
359 if ( op->o_do_not_cache || be_isroot( op ) ) {
360 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
361 lc_curr.lc_conn = NULL;
365 lc_curr.lc_local_ndn = op->o_ndn;
368 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
369 lc = (struct ldapconn *)avl_find( li->conntree,
370 (caddr_t)&lc_curr, ldap_back_conn_cmp );
371 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
373 /* Looks like we didn't get a bind. Open a new session... */
375 /* lc here must be NULL */
376 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
380 lc->lc_conn = lc_curr.lc_conn;
381 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
383 ldap_pvt_thread_mutex_init( &lc->lc_mutex );
386 ber_dupbv( &lc->lc_cred, &li->acl_passwd );
387 ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
390 BER_BVZERO( &lc->lc_cred );
391 BER_BVZERO( &lc->lc_bound_ndn );
392 if ( op->o_conn && !BER_BVISEMPTY( &op->o_ndn )
393 && op->o_bd == op->o_conn->c_authz_backend )
395 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
401 /* Inserts the newly created ldapconn in the avl tree */
402 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
403 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
404 ldap_back_conn_cmp, ldap_back_conn_dup );
406 #if PRINT_CONNTREE > 0
407 myprint( li->conntree );
408 #endif /* PRINT_CONNTREE */
410 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
412 Debug( LDAP_DEBUG_TRACE,
413 "=>ldap_back_getconn: conn %p inserted\n", (void *) lc, 0, 0 );
415 /* Err could be -1 in case a duplicate ldapconn is inserted */
416 if ( rs->sr_err != 0 ) {
417 ldap_back_conn_free( lc );
418 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
419 send_ldap_error( op, rs, LDAP_OTHER,
420 "internal server error" );
425 Debug( LDAP_DEBUG_TRACE,
426 "=>ldap_back_getconn: conn %p fetched\n", (void *) lc, 0, 0 );
435 * Note: as the check for the value of lc->lc_bound was already here, I removed
436 * it from all the callers, and I made the function return the flag, so
437 * it can be used to simplify the check.
440 ldap_back_dobind_int(
444 ldap_back_send_t sendok,
450 assert( retries >= 0 );
452 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
453 if ( !lc->lc_bound ) {
454 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
457 * FIXME: we need to let clients use proxyAuthz
458 * otherwise we cannot do symmetric pools of servers;
459 * we have to live with the fact that a user can
460 * authorize itself as any ID that is allowed
461 * by the authzTo directive of the "proxyauthzdn".
464 * NOTE: current Proxy Authorization specification
465 * and implementation do not allow proxy authorization
466 * control to be provided with Bind requests
469 * if no bind took place yet, but the connection is bound
470 * and the "idassert-authcDN" (or other ID) is set,
471 * then bind as the asserting identity and explicitly
472 * add the proxyAuthz control to every operation with the
473 * dn bound to the connection as control value.
474 * This is done also if this is the authrizing backend,
475 * but the "override" flag is given to idassert.
476 * It allows to use SASL bind and yet proxyAuthz users
478 if ( op->o_conn != NULL &&
479 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
480 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
482 (void)ldap_back_proxy_authz_bind( lc, op, rs );
487 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
488 lc->lc_bound_ndn.bv_val,
489 LDAP_SASL_SIMPLE, &lc->lc_cred,
490 NULL, NULL, &msgid );
492 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
494 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
497 /* lc here must be the regular lc, reset and ready for init */
498 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
506 ldap_back_freeconn( op, lc );
507 rs->sr_err = slap_map_api2result( rs );
512 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
513 if ( rc == LDAP_SUCCESS ) {
520 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
525 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
527 return ldap_back_dobind_int( lc, op, rs, sendok, 1 );
533 * This is a callback used for chasing referrals using the same
534 * credentials as the original user on this session.
537 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
538 ber_int_t msgid, void *params )
540 struct ldapconn *lc = (struct ldapconn *)params;
542 /* FIXME: add checks on the URL/identity? */
544 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
545 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
554 ldap_back_send_t sendok )
557 LDAPMessage *res = NULL;
560 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
563 rs->sr_matched = NULL;
565 /* if the error recorded in the reply corresponds
566 * to a successful state, get the error from the
567 * remote server response */
568 if ( ERR_OK( rs->sr_err ) ) {
570 struct timeval tv = { 0, 0 };
573 /* if result parsing fails, note the failure reason */
574 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
577 tv.tv_usec = 100000; /* 0.1 s */
578 ldap_pvt_thread_yield();
582 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
587 /* otherwise get the result; if it is not
588 * LDAP_SUCCESS, record it in the reply
589 * structure (this includes
590 * LDAP_COMPARE_{TRUE|FALSE}) */
592 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
593 &match, &text, NULL, NULL, 1 );
595 if ( rc != LDAP_SUCCESS ) {
601 /* if the error in the reply structure is not
602 * LDAP_SUCCESS, try to map it from client
604 if ( !ERR_OK( rs->sr_err ) ) {
605 rs->sr_err = slap_map_api2result( rs );
607 /* internal ops ( op->o_conn == NULL )
608 * must not reply to client */
609 if ( op->o_conn && !op->o_do_not_cache && match ) {
611 /* record the (massaged) matched
612 * DN into the reply structure */
613 rs->sr_matched = match;
617 ( ( sendok & LDAP_BACK_SENDOK )
618 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
620 send_ldap_result( op, rs );
623 if ( rs->sr_matched != match ) {
624 free( (char *)rs->sr_matched );
626 rs->sr_matched = NULL;
627 ldap_memfree( match );
630 ldap_memfree( text );
633 return( ERR_OK( rs->sr_err ) ? 0 : -1 );
636 /* return true if bound, false if failed */
638 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
640 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
641 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
645 /* lc here must be the regular lc, reset and ready for init */
646 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
650 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
651 return ldap_back_dobind_int( lc, op, rs, sendok, 0 );
655 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
657 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
658 struct berval binddn = slap_empty_bv;
659 struct berval bindcred = slap_empty_bv;
665 * FIXME: we need to let clients use proxyAuthz
666 * otherwise we cannot do symmetric pools of servers;
667 * we have to live with the fact that a user can
668 * authorize itself as any ID that is allowed
669 * by the authzTo directive of the "proxyauthzdn".
672 * NOTE: current Proxy Authorization specification
673 * and implementation do not allow proxy authorization
674 * control to be provided with Bind requests
677 * if no bind took place yet, but the connection is bound
678 * and the "proxyauthzdn" is set, then bind as
679 * "proxyauthzdn" and explicitly add the proxyAuthz
680 * control to every operation with the dn bound
681 * to the connection as control value.
684 /* bind as proxyauthzdn only if no idassert mode
685 * is requested, or if the client's identity
687 switch ( li->idassert_mode ) {
688 case LDAP_BACK_IDASSERT_LEGACY:
689 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
690 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
692 binddn = li->idassert_authcDN;
693 bindcred = li->idassert_passwd;
700 if ( li->idassert_authz ) {
701 struct berval authcDN;
703 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
704 authcDN = slap_empty_bv;
706 authcDN = op->o_conn->c_ndn;
708 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
709 &authcDN, &authcDN );
710 if ( rs->sr_err != LDAP_SUCCESS ) {
711 send_ldap_result( op, rs );
717 binddn = li->idassert_authcDN;
718 bindcred = li->idassert_passwd;
723 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
724 #ifdef HAVE_CYRUS_SASL
725 void *defaults = NULL;
726 struct berval authzID = BER_BVNULL;
729 /* if SASL supports native authz, prepare for it */
730 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
731 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
733 switch ( li->idassert_mode ) {
734 case LDAP_BACK_IDASSERT_OTHERID:
735 case LDAP_BACK_IDASSERT_OTHERDN:
736 authzID = li->idassert_authzID;
739 case LDAP_BACK_IDASSERT_ANONYMOUS:
740 BER_BVSTR( &authzID, "dn:" );
743 case LDAP_BACK_IDASSERT_SELF:
744 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
745 /* connection is not authc'd, so don't idassert */
746 BER_BVSTR( &authzID, "dn:" );
749 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
750 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
751 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
752 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
753 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
762 #if 0 /* will deal with this later... */
763 if ( sasl_secprops != NULL ) {
764 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
765 (void *) sasl_secprops );
767 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
768 send_ldap_result( op, rs );
775 defaults = lutil_sasl_defaults( lc->lc_ld,
776 li->idassert_sasl_mech.bv_val,
777 li->idassert_sasl_realm.bv_val,
778 li->idassert_authcID.bv_val,
779 li->idassert_passwd.bv_val,
782 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
783 li->idassert_sasl_mech.bv_val, NULL, NULL,
784 li->idassert_sasl_flags, lutil_sasl_interact,
787 lutil_sasl_freedefs( defaults );
789 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
792 rs->sr_err = slap_map_api2result( rs );
793 if ( rs->sr_err != LDAP_SUCCESS ) {
795 send_ldap_result( op, rs );
801 #endif /* HAVE_CYRUS_SASL */
804 switch ( li->idassert_authmethod ) {
805 case LDAP_AUTH_SIMPLE:
806 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
807 binddn.bv_val, LDAP_SASL_SIMPLE,
808 &bindcred, NULL, NULL, &msgid );
818 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
819 send_ldap_result( op, rs );
823 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
824 if ( rc == LDAP_SUCCESS ) {
832 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
833 * to existing server-side controls if required; if not,
834 * the existing server-side controls are placed in *pctrls.
835 * The caller, after using the controls in client API
836 * operations, if ( *pctrls != op->o_ctrls ), should
837 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
838 * The function returns success if the control could
839 * be added if required, or if it did nothing; in the future,
840 * it might return some error if it failed.
842 * if no bind took place yet, but the connection is bound
843 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
844 * and explicitly add proxyAuthz the control to every operation
845 * with the dn bound to the connection as control value.
847 * If no server-side controls are defined for the operation,
848 * simply add the proxyAuthz control; otherwise, if the
849 * proxyAuthz control is not already set, add it as
850 * the first one (FIXME: is controls order significant
854 ldap_back_proxy_authz_ctrl(
858 LDAPControl ***pctrls )
860 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
861 LDAPControl **ctrls = NULL;
864 struct berval assertedID;
868 rs->sr_err = LDAP_SUCCESS;
870 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
871 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) ) {
879 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
880 if ( op->o_proxy_authz ) {
882 * FIXME: we do not want to perform proxyAuthz
883 * on behalf of the client, because this would
884 * be performed with "proxyauthzdn" privileges.
886 * This might actually be too strict, since
887 * the "proxyauthzdn" authzTo, and each entry's
888 * authzFrom attributes may be crafted
889 * to avoid unwanted proxyAuthz to take place.
892 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
893 rs->sr_text = "proxyAuthz not allowed within namingContext";
898 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
902 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
906 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
910 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
911 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
912 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
914 /* already asserted in SASL via native authz */
915 /* NOTE: the test on lc->lc_bound is used to trap
916 * native authorization of anonymous users,
917 * since in that case op->o_conn->c_ndn is NULL */
921 } else if ( li->idassert_authz ) {
923 struct berval authcDN;
925 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
926 authcDN = slap_empty_bv;
928 authcDN = op->o_conn->c_ndn;
930 rc = slap_sasl_matches( op, li->idassert_authz,
931 &authcDN, & authcDN );
932 if ( rc != LDAP_SUCCESS ) {
933 /* op->o_conn->c_ndn is not authorized
939 if ( op->o_proxy_authz ) {
942 * 1) ignore the already set proxyAuthz control
943 * 2) leave it in place, and don't set ours
945 * 4) reject the operation
947 * option (4) is very drastic
948 * option (3) will make the remote server reject
949 * the operation, thus being equivalent to (4)
950 * option (2) will likely break the idassert
951 * assumptions, so we cannot accept it;
952 * option (1) means that we are contradicting
953 * the client's reques.
955 * I think (4) is the only correct choice.
957 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
958 rs->sr_text = "proxyAuthz not allowed within namingContext";
961 if ( op->o_do_not_cache && op->o_is_auth_check ) {
962 mode = LDAP_BACK_IDASSERT_NOASSERT;
965 mode = li->idassert_mode;
969 case LDAP_BACK_IDASSERT_LEGACY:
970 case LDAP_BACK_IDASSERT_SELF:
971 /* original behavior:
972 * assert the client's identity */
973 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
974 assertedID = slap_empty_bv;
976 assertedID = op->o_conn->c_ndn;
980 case LDAP_BACK_IDASSERT_ANONYMOUS:
981 /* assert "anonymous" */
982 assertedID = slap_empty_bv;
985 case LDAP_BACK_IDASSERT_NOASSERT:
986 /* don't assert; bind as proxyauthzdn */
989 case LDAP_BACK_IDASSERT_OTHERID:
990 case LDAP_BACK_IDASSERT_OTHERDN:
991 /* assert idassert DN */
992 assertedID = li->idassert_authzID;
999 if ( BER_BVISNULL( &assertedID ) ) {
1000 assertedID = slap_empty_bv;
1003 if ( op->o_ctrls ) {
1004 for ( i = 0; op->o_ctrls[ i ]; i++ )
1005 /* just count ctrls */ ;
1008 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1009 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1011 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1012 ctrls[ 0 ]->ldctl_iscritical = 1;
1014 switch ( li->idassert_mode ) {
1015 /* already in u:ID or dn:DN form */
1016 case LDAP_BACK_IDASSERT_OTHERID:
1017 case LDAP_BACK_IDASSERT_OTHERDN:
1018 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1021 /* needs the dn: prefix */
1023 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1024 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1025 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1026 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val + STRLENOF( "dn:" ),
1027 assertedID.bv_val, assertedID.bv_len + 1 );
1031 if ( op->o_ctrls ) {
1032 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1033 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1036 ctrls[ i + 1 ] = NULL;
1039 if ( ctrls == NULL ) {
1040 ctrls = op->o_ctrls;
1049 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1051 LDAPControl **ctrls = *pctrls;
1053 /* we assume that the first control is the proxyAuthz
1054 * added by back-ldap, so it's the only one we explicitly
1056 if ( ctrls && ctrls != op->o_ctrls ) {
1057 assert( ctrls[ 0 ] );
1059 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1060 free( ctrls[ 0 ]->ldctl_value.bv_val );