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_SENDRESULT );
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 ( li->flags & LDAP_BACK_F_SAVECRED ) {
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 /* Set LDAP version. This will always succeed: If the client
245 * bound with a particular version, then so can we.
247 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION,
248 (const void *)&vers );
250 /* FIXME: configurable? */
251 ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
253 if ( ( li->flags & LDAP_BACK_F_USE_TLS )
254 && !ldap_is_ldaps_url( li->url )
255 && ( rs->sr_err = ldap_start_tls_s( ld, NULL, NULL ) ) != LDAP_SUCCESS )
257 /* if StartTLS is requested, only attempt it if the URL
258 * is not "ldaps://"; this may occur not only in case
259 * of misconfiguration, but also when used in the chain
260 * overlay, where the "uri" can be parsed out of a referral */
261 if ( rs->sr_err == LDAP_SERVER_DOWN
262 || ( li->flags & LDAP_BACK_F_TLS_CRITICAL ) )
264 ldap_unbind_ext_s( ld, NULL, NULL );
269 if ( *lcp == NULL ) {
270 *lcp = (struct ldapconn *)ch_malloc( sizeof( struct ldapconn ) );
271 memset( *lcp, 0, sizeof( struct ldapconn ) );
276 if ( rs->sr_err != LDAP_SUCCESS ) {
277 rs->sr_err = slap_map_api2result( rs );
278 if ( sendok & LDAP_BACK_SENDERR ) {
279 if ( rs->sr_text == NULL ) {
280 rs->sr_text = "ldap_initialize() failed";
282 send_ldap_result( op, rs );
291 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
293 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
294 struct ldapconn *lc, lc_curr;
297 /* Searches for a ldapconn in the avl tree */
299 /* Explicit binds must not be shared */
300 if ( op->o_tag == LDAP_REQ_BIND
302 && op->o_conn->c_authz_backend
303 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private ) )
305 lc_curr.lc_conn = op->o_conn;
308 lc_curr.lc_conn = NULL;
311 /* Internal searches are privileged and shared. So is root. */
312 if ( op->o_do_not_cache || be_isroot( op ) ) {
313 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
314 lc_curr.lc_conn = NULL;
318 lc_curr.lc_local_ndn = op->o_ndn;
321 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
322 lc = (struct ldapconn *)avl_find( li->conntree,
323 (caddr_t)&lc_curr, ldap_back_conn_cmp );
324 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
326 /* Looks like we didn't get a bind. Open a new session... */
328 /* lc here must be NULL */
329 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
333 lc->lc_conn = lc_curr.lc_conn;
334 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
336 ldap_pvt_thread_mutex_init( &lc->lc_mutex );
339 ber_dupbv( &lc->lc_cred, &li->acl_passwd );
340 ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
343 BER_BVZERO( &lc->lc_cred );
344 BER_BVZERO( &lc->lc_bound_ndn );
345 if ( op->o_conn && !BER_BVISEMPTY( &op->o_ndn )
346 && op->o_bd == op->o_conn->c_authz_backend )
348 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
354 /* Inserts the newly created ldapconn in the avl tree */
355 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
356 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
357 ldap_back_conn_cmp, ldap_back_conn_dup );
359 #if PRINT_CONNTREE > 0
360 myprint( li->conntree );
361 #endif /* PRINT_CONNTREE */
363 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
365 Debug( LDAP_DEBUG_TRACE,
366 "=>ldap_back_getconn: conn %p inserted\n", (void *) lc, 0, 0 );
368 /* Err could be -1 in case a duplicate ldapconn is inserted */
369 if ( rs->sr_err != 0 ) {
370 ldap_back_conn_free( lc );
371 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
372 send_ldap_error( op, rs, LDAP_OTHER,
373 "internal server error" );
378 Debug( LDAP_DEBUG_TRACE,
379 "=>ldap_back_getconn: conn %p fetched\n", (void *) lc, 0, 0 );
388 * Note: as the check for the value of lc->lc_bound was already here, I removed
389 * it from all the callers, and I made the function return the flag, so
390 * it can be used to simplify the check.
393 ldap_back_dobind_int(
397 ldap_back_send_t sendok,
403 assert( retries >= 0 );
405 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
406 if ( !lc->lc_bound ) {
407 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
410 * FIXME: we need to let clients use proxyAuthz
411 * otherwise we cannot do symmetric pools of servers;
412 * we have to live with the fact that a user can
413 * authorize itself as any ID that is allowed
414 * by the authzTo directive of the "proxyauthzdn".
417 * NOTE: current Proxy Authorization specification
418 * and implementation do not allow proxy authorization
419 * control to be provided with Bind requests
422 * if no bind took place yet, but the connection is bound
423 * and the "idassert-authcDN" (or other ID) is set,
424 * then bind as the asserting identity and explicitly
425 * add the proxyAuthz control to every operation with the
426 * dn bound to the connection as control value.
427 * This is done also if this is the authrizing backend,
428 * but the "override" flag is given to idassert.
429 * It allows to use SASL bind and yet proxyAuthz users
431 if ( op->o_conn != NULL &&
432 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
433 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
435 (void)ldap_back_proxy_authz_bind( lc, op, rs );
440 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
441 lc->lc_bound_ndn.bv_val,
442 LDAP_SASL_SIMPLE, &lc->lc_cred,
443 NULL, NULL, &msgid );
445 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
447 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
450 /* lc here must be the regular lc, reset and ready for init */
451 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
459 ldap_back_freeconn( op, lc );
460 rs->sr_err = slap_map_api2result( rs );
465 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
466 if ( rc == LDAP_SUCCESS ) {
473 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
478 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
480 return ldap_back_dobind_int( lc, op, rs, sendok, 1 );
486 * This is a callback used for chasing referrals using the same
487 * credentials as the original user on this session.
490 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
491 ber_int_t msgid, void *params )
493 struct ldapconn *lc = (struct ldapconn *)params;
495 /* FIXME: add checks on the URL/identity? */
497 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
498 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
507 ldap_back_send_t sendok )
510 LDAPMessage *res = NULL;
513 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
516 rs->sr_matched = NULL;
518 /* if the error recorded in the reply corresponds
519 * to a successful state, get the error from the
520 * remote server response */
521 if ( ERR_OK( rs->sr_err ) ) {
523 struct timeval tv = { 0, 0 };
526 /* if result parsing fails, note the failure reason */
527 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
530 tv.tv_usec = 100000; /* 0.1 s */
531 ldap_pvt_thread_yield();
535 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
540 /* otherwise get the result; if it is not
541 * LDAP_SUCCESS, record it in the reply
542 * structure (this includes
543 * LDAP_COMPARE_{TRUE|FALSE}) */
545 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
546 &match, &text, NULL, NULL, 1 );
548 if ( rc != LDAP_SUCCESS ) {
554 /* if the error in the reply structure is not
555 * LDAP_SUCCESS, try to map it from client
557 if ( !ERR_OK( rs->sr_err ) ) {
558 rs->sr_err = slap_map_api2result( rs );
560 /* internal ops ( op->o_conn == NULL )
561 * must not reply to client */
562 if ( op->o_conn && !op->o_do_not_cache && match ) {
564 /* record the (massaged) matched
565 * DN into the reply structure */
566 rs->sr_matched = match;
570 ( ( sendok & LDAP_BACK_SENDOK )
571 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
573 send_ldap_result( op, rs );
576 if ( rs->sr_matched != match ) {
577 free( (char *)rs->sr_matched );
579 rs->sr_matched = NULL;
580 ldap_memfree( match );
583 ldap_memfree( text );
586 return( ERR_OK( rs->sr_err ) ? 0 : -1 );
589 /* return true if bound, false if failed */
591 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
593 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
594 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
598 /* lc here must be the regular lc, reset and ready for init */
599 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
603 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
604 return ldap_back_dobind_int( lc, op, rs, sendok, 0 );
608 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
610 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
611 struct berval binddn = slap_empty_bv;
612 struct berval bindcred = slap_empty_bv;
618 * FIXME: we need to let clients use proxyAuthz
619 * otherwise we cannot do symmetric pools of servers;
620 * we have to live with the fact that a user can
621 * authorize itself as any ID that is allowed
622 * by the authzTo directive of the "proxyauthzdn".
625 * NOTE: current Proxy Authorization specification
626 * and implementation do not allow proxy authorization
627 * control to be provided with Bind requests
630 * if no bind took place yet, but the connection is bound
631 * and the "proxyauthzdn" is set, then bind as
632 * "proxyauthzdn" and explicitly add the proxyAuthz
633 * control to every operation with the dn bound
634 * to the connection as control value.
637 /* bind as proxyauthzdn only if no idassert mode
638 * is requested, or if the client's identity
640 switch ( li->idassert_mode ) {
641 case LDAP_BACK_IDASSERT_LEGACY:
642 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
643 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
645 binddn = li->idassert_authcDN;
646 bindcred = li->idassert_passwd;
653 if ( li->idassert_authz ) {
654 struct berval authcDN;
656 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
657 authcDN = slap_empty_bv;
659 authcDN = op->o_conn->c_ndn;
661 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
662 &authcDN, &authcDN );
663 if ( rs->sr_err != LDAP_SUCCESS ) {
664 send_ldap_result( op, rs );
670 binddn = li->idassert_authcDN;
671 bindcred = li->idassert_passwd;
676 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
677 #ifdef HAVE_CYRUS_SASL
678 void *defaults = NULL;
679 struct berval authzID = BER_BVNULL;
682 /* if SASL supports native authz, prepare for it */
683 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
684 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
686 switch ( li->idassert_mode ) {
687 case LDAP_BACK_IDASSERT_OTHERID:
688 case LDAP_BACK_IDASSERT_OTHERDN:
689 authzID = li->idassert_authzID;
692 case LDAP_BACK_IDASSERT_ANONYMOUS:
693 BER_BVSTR( &authzID, "dn:" );
696 case LDAP_BACK_IDASSERT_SELF:
697 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
698 /* connection is not authc'd, so don't idassert */
699 BER_BVSTR( &authzID, "dn:" );
702 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
703 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
704 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
705 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
706 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
715 #if 0 /* will deal with this later... */
716 if ( sasl_secprops != NULL ) {
717 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
718 (void *) sasl_secprops );
720 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
721 send_ldap_result( op, rs );
728 defaults = lutil_sasl_defaults( lc->lc_ld,
729 li->idassert_sasl_mech.bv_val,
730 li->idassert_sasl_realm.bv_val,
731 li->idassert_authcID.bv_val,
732 li->idassert_passwd.bv_val,
735 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
736 li->idassert_sasl_mech.bv_val, NULL, NULL,
737 li->idassert_sasl_flags, lutil_sasl_interact,
740 lutil_sasl_freedefs( defaults );
742 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
745 rs->sr_err = slap_map_api2result( rs );
746 if ( rs->sr_err != LDAP_SUCCESS ) {
748 send_ldap_result( op, rs );
754 #endif /* HAVE_CYRUS_SASL */
757 switch ( li->idassert_authmethod ) {
758 case LDAP_AUTH_SIMPLE:
759 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
760 binddn.bv_val, LDAP_SASL_SIMPLE,
761 &bindcred, NULL, NULL, &msgid );
771 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
772 send_ldap_result( op, rs );
776 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
777 if ( rc == LDAP_SUCCESS ) {
785 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
786 * to existing server-side controls if required; if not,
787 * the existing server-side controls are placed in *pctrls.
788 * The caller, after using the controls in client API
789 * operations, if ( *pctrls != op->o_ctrls ), should
790 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
791 * The function returns success if the control could
792 * be added if required, or if it did nothing; in the future,
793 * it might return some error if it failed.
795 * if no bind took place yet, but the connection is bound
796 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
797 * and explicitly add proxyAuthz the control to every operation
798 * with the dn bound to the connection as control value.
800 * If no server-side controls are defined for the operation,
801 * simply add the proxyAuthz control; otherwise, if the
802 * proxyAuthz control is not already set, add it as
803 * the first one (FIXME: is controls order significant
807 ldap_back_proxy_authz_ctrl(
811 LDAPControl ***pctrls )
813 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
814 LDAPControl **ctrls = NULL;
817 struct berval assertedID;
821 rs->sr_err = LDAP_SUCCESS;
823 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
824 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) ) {
832 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
833 if ( op->o_proxy_authz ) {
835 * FIXME: we do not want to perform proxyAuthz
836 * on behalf of the client, because this would
837 * be performed with "proxyauthzdn" privileges.
839 * This might actually be too strict, since
840 * the "proxyauthzdn" authzTo, and each entry's
841 * authzFrom attributes may be crafted
842 * to avoid unwanted proxyAuthz to take place.
845 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
846 rs->sr_text = "proxyAuthz not allowed within namingContext";
851 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
855 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
859 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
863 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
864 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
865 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
867 /* already asserted in SASL via native authz */
868 /* NOTE: the test on lc->lc_bound is used to trap
869 * native authorization of anonymous users,
870 * since in that case op->o_conn->c_ndn is NULL */
874 } else if ( li->idassert_authz ) {
876 struct berval authcDN;
878 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
879 authcDN = slap_empty_bv;
881 authcDN = op->o_conn->c_ndn;
883 rc = slap_sasl_matches( op, li->idassert_authz,
884 &authcDN, & authcDN );
885 if ( rc != LDAP_SUCCESS ) {
886 /* op->o_conn->c_ndn is not authorized
892 if ( op->o_proxy_authz ) {
895 * 1) ignore the already set proxyAuthz control
896 * 2) leave it in place, and don't set ours
898 * 4) reject the operation
900 * option (4) is very drastic
901 * option (3) will make the remote server reject
902 * the operation, thus being equivalent to (4)
903 * option (2) will likely break the idassert
904 * assumptions, so we cannot accept it;
905 * option (1) means that we are contradicting
906 * the client's reques.
908 * I think (4) is the only correct choice.
910 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
911 rs->sr_text = "proxyAuthz not allowed within namingContext";
914 if ( op->o_do_not_cache && op->o_is_auth_check ) {
915 mode = LDAP_BACK_IDASSERT_NOASSERT;
918 mode = li->idassert_mode;
922 case LDAP_BACK_IDASSERT_LEGACY:
923 case LDAP_BACK_IDASSERT_SELF:
924 /* original behavior:
925 * assert the client's identity */
926 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
927 assertedID = slap_empty_bv;
929 assertedID = op->o_conn->c_ndn;
933 case LDAP_BACK_IDASSERT_ANONYMOUS:
934 /* assert "anonymous" */
935 assertedID = slap_empty_bv;
938 case LDAP_BACK_IDASSERT_NOASSERT:
939 /* don't assert; bind as proxyauthzdn */
942 case LDAP_BACK_IDASSERT_OTHERID:
943 case LDAP_BACK_IDASSERT_OTHERDN:
944 /* assert idassert DN */
945 assertedID = li->idassert_authzID;
952 if ( BER_BVISNULL( &assertedID ) ) {
953 assertedID = slap_empty_bv;
957 for ( i = 0; op->o_ctrls[ i ]; i++ )
958 /* just count ctrls */ ;
961 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
962 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
964 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
965 ctrls[ 0 ]->ldctl_iscritical = 1;
967 switch ( li->idassert_mode ) {
968 /* already in u:ID or dn:DN form */
969 case LDAP_BACK_IDASSERT_OTHERID:
970 case LDAP_BACK_IDASSERT_OTHERDN:
971 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
974 /* needs the dn: prefix */
976 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
977 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
978 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
979 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val + STRLENOF( "dn:" ),
980 assertedID.bv_val, assertedID.bv_len + 1 );
985 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
986 ctrls[ i + 1 ] = op->o_ctrls[ i ];
989 ctrls[ i + 1 ] = NULL;
992 if ( ctrls == NULL ) {
1002 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1004 LDAPControl **ctrls = *pctrls;
1006 /* we assume that the first control is the proxyAuthz
1007 * added by back-ldap, so it's the only one we explicitly
1009 if ( ctrls && ctrls != op->o_ctrls ) {
1010 assert( ctrls[ 0 ] );
1012 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1013 free( ctrls[ 0 ]->ldctl_value.bv_val );