1 /* bind.c - ldap backend bind function */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 1999-2005 The OpenLDAP Foundation.
6 * Portions Copyright 2000-2003 Pierangelo Masarati.
7 * Portions Copyright 1999-2003 Howard Chu.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted only as authorized by the OpenLDAP
14 * A copy of this license is available in the file LICENSE in the
15 * top-level directory of the distribution or, alternatively, at
16 * <http://www.OpenLDAP.org/license.html>.
19 * This work was initially developed by Howard Chu for inclusion
20 * in OpenLDAP Software and subsequently enhanced by Pierangelo
28 #include <ac/socket.h>
29 #include <ac/string.h>
33 #include "back-ldap.h"
35 #include <lutil_ldap.h>
37 #define PRINT_CONNTREE 0
39 static LDAP_REBIND_PROC ldap_back_rebind;
42 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs );
45 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
48 ldap_back_bind( Operation *op, SlapReply *rs )
50 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
56 lc = ldap_back_getconn( op, rs, LDAP_BACK_SENDERR );
61 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
62 ch_free( lc->lc_bound_ndn.bv_val );
63 BER_BVZERO( &lc->lc_bound_ndn );
67 /* method is always LDAP_AUTH_SIMPLE if we got here */
68 rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
70 &op->orb_cred, op->o_ctrls, NULL, &msgid );
71 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
73 if ( rc == LDAP_SUCCESS ) {
74 /* If defined, proxyAuthz will be used also when
75 * back-ldap is the authorizing backend; for this
76 * purpose, a successful bind is followed by a
77 * bind with the configured identity assertion */
78 /* NOTE: use with care */
79 if ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
80 ldap_back_proxy_authz_bind( lc, op, rs );
81 if ( lc->lc_bound == 0 ) {
88 ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
90 if ( LDAP_BACK_SAVECRED( li ) ) {
91 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
92 memset( lc->lc_cred.bv_val, 0,
94 ch_free( lc->lc_cred.bv_val );
96 ber_dupbv( &lc->lc_cred, &op->orb_cred );
97 ldap_set_rebind_proc( lc->lc_ld, ldap_back_rebind, lc );
102 /* must re-insert if local DN changed as result of bind */
103 if ( lc->lc_bound && !dn_match( &op->o_req_ndn, &lc->lc_local_ndn ) ) {
106 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
107 lc = avl_delete( &li->conntree, (caddr_t)lc,
108 ldap_back_conn_cmp );
109 if ( !BER_BVISNULL( &lc->lc_local_ndn ) ) {
110 ch_free( lc->lc_local_ndn.bv_val );
112 ber_dupbv( &lc->lc_local_ndn, &op->o_req_ndn );
113 lerr = avl_insert( &li->conntree, (caddr_t)lc,
114 ldap_back_conn_cmp, ldap_back_conn_dup );
115 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
117 ldap_back_conn_free( lc );
127 * compares two struct ldapconn based on the value of the conn pointer;
131 ldap_back_conn_cmp( const void *c1, const void *c2 )
133 const struct ldapconn *lc1 = (const struct ldapconn *)c1;
134 const struct ldapconn *lc2 = (const struct ldapconn *)c2;
137 /* If local DNs don't match, it is definitely not a match */
138 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
143 /* For shared sessions, conn is NULL. Only explicitly
144 * bound sessions will have non-NULL conn.
146 return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
152 * returns -1 in case a duplicate struct ldapconn has been inserted;
156 ldap_back_conn_dup( void *c1, void *c2 )
158 struct ldapconn *lc1 = (struct ldapconn *)c1;
159 struct ldapconn *lc2 = (struct ldapconn *)c2;
161 /* Cannot have more than one shared session with same DN */
162 if ( dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) &&
163 lc1->lc_conn == lc2->lc_conn )
171 #if PRINT_CONNTREE > 0
173 ravl_print( Avlnode *root, int depth )
182 ravl_print( root->avl_right, depth+1 );
184 for ( i = 0; i < depth; i++ ) {
189 printf( "lc(%lx) local(%s) conn(%lx) %d\n",
190 lc, lc->lc_local_ndn.bv_val, lc->lc_conn, root->avl_bf );
192 ravl_print( root->avl_left, depth+1 );
196 myprint( Avlnode *root )
198 printf( "********\n" );
201 printf( "\tNULL\n" );
204 ravl_print( root, 0 );
207 printf( "********\n" );
209 #endif /* PRINT_CONNTREE */
212 ldap_back_freeconn( Operation *op, struct ldapconn *lc )
214 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
216 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
217 lc = avl_delete( &li->conntree, (caddr_t)lc,
218 ldap_back_conn_cmp );
219 ldap_back_conn_free( (void *)lc );
220 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
226 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
228 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
229 int vers = op->o_protocol;
232 assert( lcp != NULL );
234 rs->sr_err = ldap_initialize( &ld, li->url );
235 if ( rs->sr_err != LDAP_SUCCESS ) {
239 /* Set LDAP version. This will always succeed: If the client
240 * bound with a particular version, then so can we.
242 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&vers );
244 /* automatically chase referrals ("chase-referrals"/"dont-chase-referrals" statement) */
245 if ( LDAP_BACK_CHASE_REFERRALS( li ) ) {
246 ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
249 /* start TLS ("start-tls"/"try-start-tls" statements) */
250 if ( ( LDAP_BACK_USE_TLS( li ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( li ) ) )
251 && !ldap_is_ldaps_url( li->url ) ) {
257 rc = ldap_start_tls( ld, NULL, NULL, &msgid );
258 if ( rc == LDAP_SUCCESS ) {
259 struct timeval tv = { 0, 0 };
262 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
264 rs->sr_err = LDAP_OTHER;
266 } else if ( rc == 0 ) {
273 rs->sr_err = LDAP_OTHER;
276 if ( rc == LDAP_RES_EXTENDED ) {
277 rc = ldap_parse_result( ld, res,
278 &rs->sr_err, NULL, NULL, NULL, NULL, 1 );
279 if ( rc != LDAP_SUCCESS ) {
282 /* FIXME: in case a referral
283 * is returned, should we try
284 * using it instead of the
286 } else if ( rs->sr_err == LDAP_REFERRAL ) {
287 rs->sr_err = LDAP_OTHER;
288 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
293 rs->sr_err = LDAP_OTHER;
300 rs->sr_err = ldap_start_tls_s( ld, NULL, NULL );
302 /* if StartTLS is requested, only attempt it if the URL
303 * is not "ldaps://"; this may occur not only in case
304 * of misconfiguration, but also when used in the chain
305 * overlay, where the "uri" can be parsed out of a referral */
306 if ( rs->sr_err == LDAP_SERVER_DOWN
307 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( li ) ) )
309 ldap_unbind_ext_s( ld, NULL, NULL );
314 if ( *lcp == NULL ) {
315 *lcp = (struct ldapconn *)ch_malloc( sizeof( struct ldapconn ) );
316 memset( *lcp, 0, sizeof( struct ldapconn ) );
321 if ( rs->sr_err != LDAP_SUCCESS ) {
322 rs->sr_err = slap_map_api2result( rs );
323 if ( sendok & LDAP_BACK_SENDERR ) {
324 if ( rs->sr_text == NULL ) {
325 rs->sr_text = "ldap_initialize() failed";
327 send_ldap_result( op, rs );
336 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
338 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
339 struct ldapconn *lc, lc_curr;
342 /* Searches for a ldapconn in the avl tree */
344 /* Explicit binds must not be shared */
345 if ( op->o_tag == LDAP_REQ_BIND
347 && op->o_conn->c_authz_backend
348 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private ) )
350 lc_curr.lc_conn = op->o_conn;
353 lc_curr.lc_conn = NULL;
356 /* Internal searches are privileged and shared. So is root. */
357 if ( op->o_do_not_cache || be_isroot( op ) ) {
358 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
359 lc_curr.lc_conn = NULL;
363 lc_curr.lc_local_ndn = op->o_ndn;
366 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
367 lc = (struct ldapconn *)avl_find( li->conntree,
368 (caddr_t)&lc_curr, ldap_back_conn_cmp );
369 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
371 /* Looks like we didn't get a bind. Open a new session... */
373 /* lc here must be NULL */
374 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
378 lc->lc_conn = lc_curr.lc_conn;
379 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
381 ldap_pvt_thread_mutex_init( &lc->lc_mutex );
384 ber_dupbv( &lc->lc_cred, &li->acl_passwd );
385 ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
388 BER_BVZERO( &lc->lc_cred );
389 BER_BVZERO( &lc->lc_bound_ndn );
390 if ( op->o_conn && !BER_BVISEMPTY( &op->o_ndn )
391 && op->o_bd == op->o_conn->c_authz_backend )
393 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
399 /* Inserts the newly created ldapconn in the avl tree */
400 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
401 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
402 ldap_back_conn_cmp, ldap_back_conn_dup );
404 #if PRINT_CONNTREE > 0
405 myprint( li->conntree );
406 #endif /* PRINT_CONNTREE */
408 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
410 Debug( LDAP_DEBUG_TRACE,
411 "=>ldap_back_getconn: conn %p inserted\n", (void *) lc, 0, 0 );
413 /* Err could be -1 in case a duplicate ldapconn is inserted */
414 if ( rs->sr_err != 0 ) {
415 ldap_back_conn_free( lc );
416 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
417 send_ldap_error( op, rs, LDAP_OTHER,
418 "internal server error" );
423 Debug( LDAP_DEBUG_TRACE,
424 "=>ldap_back_getconn: conn %p fetched\n", (void *) lc, 0, 0 );
433 * Note: as the check for the value of lc->lc_bound was already here, I removed
434 * it from all the callers, and I made the function return the flag, so
435 * it can be used to simplify the check.
438 ldap_back_dobind_int(
442 ldap_back_send_t sendok,
448 assert( retries >= 0 );
450 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
451 if ( !lc->lc_bound ) {
452 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
455 * FIXME: we need to let clients use proxyAuthz
456 * otherwise we cannot do symmetric pools of servers;
457 * we have to live with the fact that a user can
458 * authorize itself as any ID that is allowed
459 * by the authzTo directive of the "proxyauthzdn".
462 * NOTE: current Proxy Authorization specification
463 * and implementation do not allow proxy authorization
464 * control to be provided with Bind requests
467 * if no bind took place yet, but the connection is bound
468 * and the "idassert-authcDN" (or other ID) is set,
469 * then bind as the asserting identity and explicitly
470 * add the proxyAuthz control to every operation with the
471 * dn bound to the connection as control value.
472 * This is done also if this is the authrizing backend,
473 * but the "override" flag is given to idassert.
474 * It allows to use SASL bind and yet proxyAuthz users
476 if ( op->o_conn != NULL &&
477 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
478 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
480 (void)ldap_back_proxy_authz_bind( lc, op, rs );
485 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
486 lc->lc_bound_ndn.bv_val,
487 LDAP_SASL_SIMPLE, &lc->lc_cred,
488 NULL, NULL, &msgid );
490 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
492 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
495 /* lc here must be the regular lc, reset and ready for init */
496 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
504 ldap_back_freeconn( op, lc );
505 rs->sr_err = slap_map_api2result( rs );
510 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
511 if ( rc == LDAP_SUCCESS ) {
518 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
523 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
525 return ldap_back_dobind_int( lc, op, rs, sendok, 1 );
531 * This is a callback used for chasing referrals using the same
532 * credentials as the original user on this session.
535 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
536 ber_int_t msgid, void *params )
538 struct ldapconn *lc = (struct ldapconn *)params;
540 /* FIXME: add checks on the URL/identity? */
542 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
543 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
552 ldap_back_send_t sendok )
555 LDAPMessage *res = NULL;
558 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
561 rs->sr_matched = NULL;
563 /* if the error recorded in the reply corresponds
564 * to a successful state, get the error from the
565 * remote server response */
566 if ( ERR_OK( rs->sr_err ) ) {
568 struct timeval tv = { 0, 0 };
571 /* if result parsing fails, note the failure reason */
572 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
575 tv.tv_usec = 100000; /* 0.1 s */
576 ldap_pvt_thread_yield();
580 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
585 /* otherwise get the result; if it is not
586 * LDAP_SUCCESS, record it in the reply
587 * structure (this includes
588 * LDAP_COMPARE_{TRUE|FALSE}) */
590 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
591 &match, &text, NULL, NULL, 1 );
593 if ( rc != LDAP_SUCCESS ) {
599 /* if the error in the reply structure is not
600 * LDAP_SUCCESS, try to map it from client
602 if ( !ERR_OK( rs->sr_err ) ) {
603 rs->sr_err = slap_map_api2result( rs );
605 /* internal ops ( op->o_conn == NULL )
606 * must not reply to client */
607 if ( op->o_conn && !op->o_do_not_cache && match ) {
609 /* record the (massaged) matched
610 * DN into the reply structure */
611 rs->sr_matched = match;
615 ( ( sendok & LDAP_BACK_SENDOK )
616 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
618 send_ldap_result( op, rs );
621 if ( rs->sr_matched != match ) {
622 free( (char *)rs->sr_matched );
624 rs->sr_matched = NULL;
625 ldap_memfree( match );
628 ldap_memfree( text );
631 return( ERR_OK( rs->sr_err ) ? 0 : -1 );
634 /* return true if bound, false if failed */
636 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
638 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
639 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
643 /* lc here must be the regular lc, reset and ready for init */
644 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
648 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
649 return ldap_back_dobind_int( lc, op, rs, sendok, 0 );
653 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
655 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
656 struct berval binddn = slap_empty_bv;
657 struct berval bindcred = slap_empty_bv;
663 * FIXME: we need to let clients use proxyAuthz
664 * otherwise we cannot do symmetric pools of servers;
665 * we have to live with the fact that a user can
666 * authorize itself as any ID that is allowed
667 * by the authzTo directive of the "proxyauthzdn".
670 * NOTE: current Proxy Authorization specification
671 * and implementation do not allow proxy authorization
672 * control to be provided with Bind requests
675 * if no bind took place yet, but the connection is bound
676 * and the "proxyauthzdn" is set, then bind as
677 * "proxyauthzdn" and explicitly add the proxyAuthz
678 * control to every operation with the dn bound
679 * to the connection as control value.
682 /* bind as proxyauthzdn only if no idassert mode
683 * is requested, or if the client's identity
685 switch ( li->idassert_mode ) {
686 case LDAP_BACK_IDASSERT_LEGACY:
687 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
688 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
690 binddn = li->idassert_authcDN;
691 bindcred = li->idassert_passwd;
698 if ( li->idassert_authz ) {
699 struct berval authcDN;
701 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
702 authcDN = slap_empty_bv;
704 authcDN = op->o_conn->c_ndn;
706 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
707 &authcDN, &authcDN );
708 if ( rs->sr_err != LDAP_SUCCESS ) {
709 send_ldap_result( op, rs );
715 binddn = li->idassert_authcDN;
716 bindcred = li->idassert_passwd;
721 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
722 #ifdef HAVE_CYRUS_SASL
723 void *defaults = NULL;
724 struct berval authzID = BER_BVNULL;
727 /* if SASL supports native authz, prepare for it */
728 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
729 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
731 switch ( li->idassert_mode ) {
732 case LDAP_BACK_IDASSERT_OTHERID:
733 case LDAP_BACK_IDASSERT_OTHERDN:
734 authzID = li->idassert_authzID;
737 case LDAP_BACK_IDASSERT_ANONYMOUS:
738 BER_BVSTR( &authzID, "dn:" );
741 case LDAP_BACK_IDASSERT_SELF:
742 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
743 /* connection is not authc'd, so don't idassert */
744 BER_BVSTR( &authzID, "dn:" );
747 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
748 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
749 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
750 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
751 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
760 #if 0 /* will deal with this later... */
761 if ( sasl_secprops != NULL ) {
762 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
763 (void *) sasl_secprops );
765 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
766 send_ldap_result( op, rs );
773 defaults = lutil_sasl_defaults( lc->lc_ld,
774 li->idassert_sasl_mech.bv_val,
775 li->idassert_sasl_realm.bv_val,
776 li->idassert_authcID.bv_val,
777 li->idassert_passwd.bv_val,
780 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
781 li->idassert_sasl_mech.bv_val, NULL, NULL,
782 li->idassert_sasl_flags, lutil_sasl_interact,
785 lutil_sasl_freedefs( defaults );
787 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
790 rs->sr_err = slap_map_api2result( rs );
791 if ( rs->sr_err != LDAP_SUCCESS ) {
793 send_ldap_result( op, rs );
799 #endif /* HAVE_CYRUS_SASL */
802 switch ( li->idassert_authmethod ) {
803 case LDAP_AUTH_SIMPLE:
804 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
805 binddn.bv_val, LDAP_SASL_SIMPLE,
806 &bindcred, NULL, NULL, &msgid );
816 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
817 send_ldap_result( op, rs );
821 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
822 if ( rc == LDAP_SUCCESS ) {
830 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
831 * to existing server-side controls if required; if not,
832 * the existing server-side controls are placed in *pctrls.
833 * The caller, after using the controls in client API
834 * operations, if ( *pctrls != op->o_ctrls ), should
835 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
836 * The function returns success if the control could
837 * be added if required, or if it did nothing; in the future,
838 * it might return some error if it failed.
840 * if no bind took place yet, but the connection is bound
841 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
842 * and explicitly add proxyAuthz the control to every operation
843 * with the dn bound to the connection as control value.
845 * If no server-side controls are defined for the operation,
846 * simply add the proxyAuthz control; otherwise, if the
847 * proxyAuthz control is not already set, add it as
848 * the first one (FIXME: is controls order significant
852 ldap_back_proxy_authz_ctrl(
856 LDAPControl ***pctrls )
858 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
859 LDAPControl **ctrls = NULL;
862 struct berval assertedID;
866 rs->sr_err = LDAP_SUCCESS;
868 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
869 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) ) {
877 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
878 if ( op->o_proxy_authz ) {
880 * FIXME: we do not want to perform proxyAuthz
881 * on behalf of the client, because this would
882 * be performed with "proxyauthzdn" privileges.
884 * This might actually be too strict, since
885 * the "proxyauthzdn" authzTo, and each entry's
886 * authzFrom attributes may be crafted
887 * to avoid unwanted proxyAuthz to take place.
890 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
891 rs->sr_text = "proxyAuthz not allowed within namingContext";
896 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
900 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
904 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
908 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
909 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
910 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
912 /* already asserted in SASL via native authz */
913 /* NOTE: the test on lc->lc_bound is used to trap
914 * native authorization of anonymous users,
915 * since in that case op->o_conn->c_ndn is NULL */
919 } else if ( li->idassert_authz ) {
921 struct berval authcDN;
923 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
924 authcDN = slap_empty_bv;
926 authcDN = op->o_conn->c_ndn;
928 rc = slap_sasl_matches( op, li->idassert_authz,
929 &authcDN, & authcDN );
930 if ( rc != LDAP_SUCCESS ) {
931 /* op->o_conn->c_ndn is not authorized
937 if ( op->o_proxy_authz ) {
940 * 1) ignore the already set proxyAuthz control
941 * 2) leave it in place, and don't set ours
943 * 4) reject the operation
945 * option (4) is very drastic
946 * option (3) will make the remote server reject
947 * the operation, thus being equivalent to (4)
948 * option (2) will likely break the idassert
949 * assumptions, so we cannot accept it;
950 * option (1) means that we are contradicting
951 * the client's reques.
953 * I think (4) is the only correct choice.
955 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
956 rs->sr_text = "proxyAuthz not allowed within namingContext";
959 if ( op->o_do_not_cache && op->o_is_auth_check ) {
960 mode = LDAP_BACK_IDASSERT_NOASSERT;
963 mode = li->idassert_mode;
967 case LDAP_BACK_IDASSERT_LEGACY:
968 case LDAP_BACK_IDASSERT_SELF:
969 /* original behavior:
970 * assert the client's identity */
971 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
972 assertedID = slap_empty_bv;
974 assertedID = op->o_conn->c_ndn;
978 case LDAP_BACK_IDASSERT_ANONYMOUS:
979 /* assert "anonymous" */
980 assertedID = slap_empty_bv;
983 case LDAP_BACK_IDASSERT_NOASSERT:
984 /* don't assert; bind as proxyauthzdn */
987 case LDAP_BACK_IDASSERT_OTHERID:
988 case LDAP_BACK_IDASSERT_OTHERDN:
989 /* assert idassert DN */
990 assertedID = li->idassert_authzID;
997 if ( BER_BVISNULL( &assertedID ) ) {
998 assertedID = slap_empty_bv;
1001 if ( op->o_ctrls ) {
1002 for ( i = 0; op->o_ctrls[ i ]; i++ )
1003 /* just count ctrls */ ;
1006 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1007 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1009 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1010 ctrls[ 0 ]->ldctl_iscritical = 1;
1012 switch ( li->idassert_mode ) {
1013 /* already in u:ID or dn:DN form */
1014 case LDAP_BACK_IDASSERT_OTHERID:
1015 case LDAP_BACK_IDASSERT_OTHERDN:
1016 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1019 /* needs the dn: prefix */
1021 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1022 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1023 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1024 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val + STRLENOF( "dn:" ),
1025 assertedID.bv_val, assertedID.bv_len + 1 );
1029 if ( op->o_ctrls ) {
1030 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1031 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1034 ctrls[ i + 1 ] = NULL;
1037 if ( ctrls == NULL ) {
1038 ctrls = op->o_ctrls;
1047 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1049 LDAPControl **ctrls = *pctrls;
1051 /* we assume that the first control is the proxyAuthz
1052 * added by back-ldap, so it's the only one we explicitly
1054 if ( ctrls && ctrls != op->o_ctrls ) {
1055 assert( ctrls[ 0 ] );
1057 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1058 free( ctrls[ 0 ]->ldctl_value.bv_val );