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 ) ) {
104 struct ldapconn *tmplc;
107 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
108 tmplc = avl_delete( &li->conntree, (caddr_t)lc,
109 ldap_back_conn_cmp );
110 if ( tmplc != NULL ) {
111 if ( !BER_BVISNULL( &lc->lc_local_ndn ) ) {
112 ch_free( lc->lc_local_ndn.bv_val );
114 ber_dupbv( &lc->lc_local_ndn, &op->o_req_ndn );
115 lerr = avl_insert( &li->conntree, (caddr_t)lc,
116 ldap_back_conn_cmp, ldap_back_conn_dup );
119 /* something BAD happened */
123 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
125 ldap_back_conn_free( lc );
135 * compares two struct ldapconn based on the value of the conn pointer;
139 ldap_back_conn_cmp( const void *c1, const void *c2 )
141 const struct ldapconn *lc1 = (const struct ldapconn *)c1;
142 const struct ldapconn *lc2 = (const struct ldapconn *)c2;
145 /* If local DNs don't match, it is definitely not a match */
146 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
151 /* For shared sessions, conn is NULL. Only explicitly
152 * bound sessions will have non-NULL conn.
154 return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
160 * returns -1 in case a duplicate struct ldapconn has been inserted;
164 ldap_back_conn_dup( void *c1, void *c2 )
166 struct ldapconn *lc1 = (struct ldapconn *)c1;
167 struct ldapconn *lc2 = (struct ldapconn *)c2;
169 /* Cannot have more than one shared session with same DN */
170 if ( dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) &&
171 lc1->lc_conn == lc2->lc_conn )
179 #if PRINT_CONNTREE > 0
181 ravl_print( Avlnode *root, int depth )
190 ravl_print( root->avl_right, depth+1 );
192 for ( i = 0; i < depth; i++ ) {
197 printf( "lc(%lx) local(%s) conn(%lx) %d\n",
198 lc, lc->lc_local_ndn.bv_val, lc->lc_conn, root->avl_bf );
200 ravl_print( root->avl_left, depth+1 );
204 myprint( Avlnode *root )
206 printf( "********\n" );
209 printf( "\tNULL\n" );
212 ravl_print( root, 0 );
215 printf( "********\n" );
217 #endif /* PRINT_CONNTREE */
220 ldap_back_freeconn( Operation *op, struct ldapconn *lc )
222 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
225 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
226 lc = avl_delete( &li->conntree, (caddr_t)lc,
227 ldap_back_conn_cmp );
229 /* something BAD happened */
233 ldap_back_conn_free( (void *)lc );
235 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
241 ldap_back_prepare_conn( struct ldapconn **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
243 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
244 int vers = op->o_protocol;
247 assert( lcp != NULL );
249 rs->sr_err = ldap_initialize( &ld, li->url );
250 if ( rs->sr_err != LDAP_SUCCESS ) {
254 /* Set LDAP version. This will always succeed: If the client
255 * bound with a particular version, then so can we.
257 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&vers );
259 /* automatically chase referrals ("[dont-]chase-referrals" statement) */
260 if ( LDAP_BACK_CHASE_REFERRALS( li ) ) {
261 ldap_set_option( ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
265 /* start TLS ("tls-[try-]{start,propagate}" statements) */
266 if ( ( LDAP_BACK_USE_TLS( li ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( li ) ) )
267 && !ldap_is_ldaps_url( li->url ) )
269 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
271 * use asynchronous StartTLS
272 * in case, chase referral (not implemented yet)
276 rs->sr_err = ldap_start_tls( ld, NULL, NULL, &msgid );
277 if ( rs->sr_err == LDAP_SUCCESS ) {
278 LDAPMessage *res = NULL;
280 struct timeval tv = { 0, 0 };
283 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
285 rs->sr_err = LDAP_OTHER;
287 } else if ( rc == 0 ) {
294 rs->sr_err = LDAP_OTHER;
296 } else if ( rc == LDAP_RES_EXTENDED ) {
297 struct berval *data = NULL;
299 rs->sr_err = ldap_parse_extended_result( ld, res,
301 if ( rs->sr_err == LDAP_SUCCESS ) {
302 rs->sr_err = ldap_result2error( ld, res, 1 );
305 /* FIXME: in case a referral
306 * is returned, should we try
307 * using it instead of the
309 if ( rs->sr_err == LDAP_SUCCESS ) {
310 ldap_install_tls( ld );
312 } else if ( rs->sr_err == LDAP_REFERRAL ) {
313 rs->sr_err = LDAP_OTHER;
314 rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
318 if ( data->bv_val ) {
319 ber_memfree( data->bv_val );
326 rs->sr_err = LDAP_OTHER;
333 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
335 * use synchronous StartTLS
337 rs->sr_err = ldap_start_tls_s( ld, NULL, NULL );
338 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
340 /* if StartTLS is requested, only attempt it if the URL
341 * is not "ldaps://"; this may occur not only in case
342 * of misconfiguration, but also when used in the chain
343 * overlay, where the "uri" can be parsed out of a referral */
344 if ( rs->sr_err == LDAP_SERVER_DOWN
345 || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( li ) ) )
347 ldap_unbind_ext_s( ld, NULL, NULL );
351 /* in case Start TLS is not critical */
352 rs->sr_err = LDAP_SUCCESS;
354 #endif /* HAVE_TLS */
356 if ( *lcp == NULL ) {
357 *lcp = (struct ldapconn *)ch_malloc( sizeof( struct ldapconn ) );
358 memset( *lcp, 0, sizeof( struct ldapconn ) );
363 if ( rs->sr_err != LDAP_SUCCESS ) {
364 rs->sr_err = slap_map_api2result( rs );
365 if ( sendok & LDAP_BACK_SENDERR ) {
366 if ( rs->sr_text == NULL ) {
367 rs->sr_text = "ldap_initialize() failed";
369 send_ldap_result( op, rs );
378 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
380 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
381 struct ldapconn *lc, lc_curr = { 0 };
383 /* Searches for a ldapconn in the avl tree */
385 /* Explicit binds must not be shared */
386 if ( op->o_tag == LDAP_REQ_BIND
388 && op->o_conn->c_authz_backend
389 && op->o_bd->be_private == op->o_conn->c_authz_backend->be_private ) )
391 lc_curr.lc_conn = op->o_conn;
394 lc_curr.lc_conn = NULL;
397 /* Internal searches are privileged and shared. So is root. */
398 if ( op->o_do_not_cache || be_isroot( op ) ) {
399 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
400 lc_curr.lc_conn = NULL;
401 lc_curr.lc_ispriv = 1;
404 lc_curr.lc_local_ndn = op->o_ndn;
407 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
408 lc = (struct ldapconn *)avl_find( li->conntree,
409 (caddr_t)&lc_curr, ldap_back_conn_cmp );
410 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
412 /* Looks like we didn't get a bind. Open a new session... */
414 /* lc here must be NULL */
415 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
419 lc->lc_conn = lc_curr.lc_conn;
420 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
422 ldap_pvt_thread_mutex_init( &lc->lc_mutex );
424 if ( lc_curr.lc_ispriv ) {
425 ber_dupbv( &lc->lc_cred, &li->acl_passwd );
426 ber_dupbv( &lc->lc_bound_ndn, &li->acl_authcDN );
427 lc->lc_ispriv = lc_curr.lc_ispriv;
430 BER_BVZERO( &lc->lc_cred );
431 BER_BVZERO( &lc->lc_bound_ndn );
432 if ( op->o_conn && !BER_BVISEMPTY( &op->o_ndn )
433 && op->o_bd == op->o_conn->c_authz_backend )
435 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
441 /* Inserts the newly created ldapconn in the avl tree */
442 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
443 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
444 ldap_back_conn_cmp, ldap_back_conn_dup );
446 #if PRINT_CONNTREE > 0
447 myprint( li->conntree );
448 #endif /* PRINT_CONNTREE */
450 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
452 Debug( LDAP_DEBUG_TRACE,
453 "=>ldap_back_getconn: conn %p inserted\n", (void *) lc, 0, 0 );
455 /* Err could be -1 in case a duplicate ldapconn is inserted */
456 if ( rs->sr_err != 0 ) {
457 ldap_back_conn_free( lc );
458 rs->sr_err = LDAP_OTHER;
459 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
460 send_ldap_error( op, rs, LDAP_OTHER,
461 "internal server error" );
466 Debug( LDAP_DEBUG_TRACE,
467 "=>ldap_back_getconn: conn %p fetched\n", (void *) lc, 0, 0 );
476 * Note: as the check for the value of lc->lc_bound was already here, I removed
477 * it from all the callers, and I made the function return the flag, so
478 * it can be used to simplify the check.
481 ldap_back_dobind_int(
485 ldap_back_send_t sendok,
491 assert( retries >= 0 );
493 if ( !lc->lc_bound ) {
494 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
497 * FIXME: we need to let clients use proxyAuthz
498 * otherwise we cannot do symmetric pools of servers;
499 * we have to live with the fact that a user can
500 * authorize itself as any ID that is allowed
501 * by the authzTo directive of the "proxyauthzdn".
504 * NOTE: current Proxy Authorization specification
505 * and implementation do not allow proxy authorization
506 * control to be provided with Bind requests
509 * if no bind took place yet, but the connection is bound
510 * and the "idassert-authcDN" (or other ID) is set,
511 * then bind as the asserting identity and explicitly
512 * add the proxyAuthz control to every operation with the
513 * dn bound to the connection as control value.
514 * This is done also if this is the authrizing backend,
515 * but the "override" flag is given to idassert.
516 * It allows to use SASL bind and yet proxyAuthz users
518 if ( op->o_conn != NULL &&
519 !op->o_do_not_cache &&
521 ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
522 ( li->idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
524 (void)ldap_back_proxy_authz_bind( lc, op, rs );
528 #ifdef HAVE_CYRUS_SASL
529 if ( lc->lc_ispriv && li->acl_authmethod == LDAP_AUTH_SASL ) {
530 void *defaults = NULL;
532 #if 1 /* will deal with this later... */
533 if ( li->acl_secprops != NULL ) {
534 rc = ldap_set_option( lc->lc_ld,
535 LDAP_OPT_X_SASL_SECPROPS, li->acl_secprops);
537 if( rc != LDAP_OPT_SUCCESS ) {
538 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
539 "(%s,SECPROPS,\"%s\") failed!\n",
540 li->url, li->acl_secprops, 0 );
546 defaults = lutil_sasl_defaults( lc->lc_ld,
547 li->acl_sasl_mech.bv_val,
548 li->acl_sasl_realm.bv_val,
549 li->acl_authcID.bv_val,
550 li->acl_passwd.bv_val,
553 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
554 li->acl_authcDN.bv_val,
555 li->acl_sasl_mech.bv_val, NULL, NULL,
556 LDAP_SASL_QUIET, lutil_sasl_interact,
559 lutil_sasl_freedefs( defaults );
561 rs->sr_err = slap_map_api2result( rs );
562 if ( rs->sr_err != LDAP_SUCCESS ) {
564 send_ldap_result( op, rs );
571 #endif /* HAVE_CYRUS_SASL */
574 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
575 lc->lc_bound_ndn.bv_val,
576 LDAP_SASL_SIMPLE, &lc->lc_cred,
577 NULL, NULL, &msgid );
579 if ( rs->sr_err == LDAP_SERVER_DOWN ) {
581 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
584 /* lc here must be the regular lc, reset and ready for init */
585 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
593 ldap_back_freeconn( op, lc );
594 rs->sr_err = slap_map_api2result( rs );
599 rc = ldap_back_op_result( lc, op, rs, msgid, sendok );
600 if ( rc == LDAP_SUCCESS ) {
611 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
615 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
616 rc = ldap_back_dobind_int( lc, op, rs, sendok, 1 );
617 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
625 * This is a callback used for chasing referrals using the same
626 * credentials as the original user on this session.
629 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
630 ber_int_t msgid, void *params )
632 struct ldapconn *lc = (struct ldapconn *)params;
634 /* FIXME: add checks on the URL/identity? */
636 return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
637 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
646 ldap_back_send_t sendok )
649 LDAPMessage *res = NULL;
652 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
655 rs->sr_matched = NULL;
657 /* if the error recorded in the reply corresponds
658 * to a successful state, get the error from the
659 * remote server response */
660 if ( ERR_OK( rs->sr_err ) ) {
662 struct timeval tv = { 0, 0 };
665 /* if result parsing fails, note the failure reason */
666 switch ( ldap_result( lc->lc_ld, msgid, 1, &tv, &res ) ) {
669 tv.tv_usec = 100000; /* 0.1 s */
670 ldap_pvt_thread_yield();
674 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
679 /* otherwise get the result; if it is not
680 * LDAP_SUCCESS, record it in the reply
681 * structure (this includes
682 * LDAP_COMPARE_{TRUE|FALSE}) */
684 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
685 &match, &text, NULL, NULL, 1 );
687 if ( rc != LDAP_SUCCESS ) {
693 /* if the error in the reply structure is not
694 * LDAP_SUCCESS, try to map it from client
696 if ( !ERR_OK( rs->sr_err ) ) {
697 rs->sr_err = slap_map_api2result( rs );
699 /* internal ops ( op->o_conn == NULL )
700 * must not reply to client */
701 if ( op->o_conn && !op->o_do_not_cache && match ) {
703 /* record the (massaged) matched
704 * DN into the reply structure */
705 rs->sr_matched = match;
709 ( ( sendok & LDAP_BACK_SENDOK )
710 || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
712 send_ldap_result( op, rs );
715 if ( rs->sr_matched != match ) {
716 free( (char *)rs->sr_matched );
718 rs->sr_matched = NULL;
719 ldap_memfree( match );
722 ldap_memfree( text );
725 return( ERR_OK( rs->sr_err ) ? 0 : -1 );
728 /* return true if bound, false if failed */
730 ldap_back_retry( struct ldapconn *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
734 ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
735 ldap_unbind_ext_s( lc->lc_ld, NULL, NULL );
739 /* lc here must be the regular lc, reset and ready for init */
740 rc = ldap_back_prepare_conn( &lc, op, rs, sendok );
741 if ( rc == LDAP_SUCCESS ) {
742 rc = ldap_back_dobind_int( lc, op, rs, sendok, 0 );
744 ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
750 ldap_back_proxy_authz_bind( struct ldapconn *lc, Operation *op, SlapReply *rs )
752 struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
753 struct berval binddn = slap_empty_bv;
754 struct berval bindcred = slap_empty_bv;
760 * FIXME: we need to let clients use proxyAuthz
761 * otherwise we cannot do symmetric pools of servers;
762 * we have to live with the fact that a user can
763 * authorize itself as any ID that is allowed
764 * by the authzTo directive of the "proxyauthzdn".
767 * NOTE: current Proxy Authorization specification
768 * and implementation do not allow proxy authorization
769 * control to be provided with Bind requests
772 * if no bind took place yet, but the connection is bound
773 * and the "proxyauthzdn" is set, then bind as
774 * "proxyauthzdn" and explicitly add the proxyAuthz
775 * control to every operation with the dn bound
776 * to the connection as control value.
779 /* bind as proxyauthzdn only if no idassert mode
780 * is requested, or if the client's identity
782 switch ( li->idassert_mode ) {
783 case LDAP_BACK_IDASSERT_LEGACY:
784 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) && !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
785 if ( !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
787 binddn = li->idassert_authcDN;
788 bindcred = li->idassert_passwd;
795 if ( li->idassert_authz ) {
796 struct berval authcDN;
798 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
799 authcDN = slap_empty_bv;
801 authcDN = op->o_conn->c_ndn;
803 rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
804 &authcDN, &authcDN );
805 if ( rs->sr_err != LDAP_SUCCESS ) {
806 send_ldap_result( op, rs );
812 binddn = li->idassert_authcDN;
813 bindcred = li->idassert_passwd;
818 if ( dobind && li->idassert_authmethod == LDAP_AUTH_SASL ) {
819 #ifdef HAVE_CYRUS_SASL
820 void *defaults = NULL;
821 struct berval authzID = BER_BVNULL;
824 /* if SASL supports native authz, prepare for it */
825 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
826 ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
828 switch ( li->idassert_mode ) {
829 case LDAP_BACK_IDASSERT_OTHERID:
830 case LDAP_BACK_IDASSERT_OTHERDN:
831 authzID = li->idassert_authzID;
834 case LDAP_BACK_IDASSERT_ANONYMOUS:
835 BER_BVSTR( &authzID, "dn:" );
838 case LDAP_BACK_IDASSERT_SELF:
839 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
840 /* connection is not authc'd, so don't idassert */
841 BER_BVSTR( &authzID, "dn:" );
844 authzID.bv_len = STRLENOF( "dn:" ) + op->o_conn->c_ndn.bv_len;
845 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
846 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
847 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
848 op->o_conn->c_ndn.bv_val, op->o_conn->c_ndn.bv_len + 1 );
857 #if 0 /* will deal with this later... */
858 if ( sasl_secprops != NULL ) {
859 rs->sr_err = ldap_set_option( lc->lc_ld, LDAP_OPT_X_SASL_SECPROPS,
860 (void *) sasl_secprops );
862 if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
863 send_ldap_result( op, rs );
870 defaults = lutil_sasl_defaults( lc->lc_ld,
871 li->idassert_sasl_mech.bv_val,
872 li->idassert_sasl_realm.bv_val,
873 li->idassert_authcID.bv_val,
874 li->idassert_passwd.bv_val,
877 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
878 li->idassert_sasl_mech.bv_val, NULL, NULL,
879 LDAP_SASL_QUIET, lutil_sasl_interact,
882 lutil_sasl_freedefs( defaults );
884 slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
887 rs->sr_err = slap_map_api2result( rs );
888 if ( rs->sr_err != LDAP_SUCCESS ) {
890 send_ldap_result( op, rs );
896 #endif /* HAVE_CYRUS_SASL */
899 switch ( li->idassert_authmethod ) {
900 case LDAP_AUTH_SIMPLE:
901 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
902 binddn.bv_val, LDAP_SASL_SIMPLE,
903 &bindcred, NULL, NULL, &msgid );
913 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
914 send_ldap_result( op, rs );
918 rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_SENDERR );
919 if ( rc == LDAP_SUCCESS ) {
927 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
928 * to existing server-side controls if required; if not,
929 * the existing server-side controls are placed in *pctrls.
930 * The caller, after using the controls in client API
931 * operations, if ( *pctrls != op->o_ctrls ), should
932 * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
933 * The function returns success if the control could
934 * be added if required, or if it did nothing; in the future,
935 * it might return some error if it failed.
937 * if no bind took place yet, but the connection is bound
938 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
939 * and explicitly add proxyAuthz the control to every operation
940 * with the dn bound to the connection as control value.
942 * If no server-side controls are defined for the operation,
943 * simply add the proxyAuthz control; otherwise, if the
944 * proxyAuthz control is not already set, add it as
947 * FIXME: is controls order significant for security?
948 * ANSWER: controls ordering and interoperability
949 * must be indicated by the specs of each control; if none
950 * is specified, the order is irrelevant.
953 ldap_back_proxy_authz_ctrl(
957 LDAPControl ***pctrls )
959 struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
960 LDAPControl **ctrls = NULL;
963 struct berval assertedID;
967 rs->sr_err = LDAP_SUCCESS;
969 if ( ( BER_BVISNULL( &li->idassert_authcID ) || BER_BVISEMPTY( &li->idassert_authcID ) )
970 && ( BER_BVISNULL( &li->idassert_authcDN ) || BER_BVISEMPTY( &li->idassert_authcDN ) ) ) {
974 if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
978 if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
979 if ( op->o_proxy_authz ) {
981 * FIXME: we do not want to perform proxyAuthz
982 * on behalf of the client, because this would
983 * be performed with "proxyauthzdn" privileges.
985 * This might actually be too strict, since
986 * the "proxyauthzdn" authzTo, and each entry's
987 * authzFrom attributes may be crafted
988 * to avoid unwanted proxyAuthz to take place.
991 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
992 rs->sr_text = "proxyAuthz not allowed within namingContext";
997 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1001 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1005 if ( BER_BVISNULL( &li->idassert_authcDN ) ) {
1009 } else if ( li->idassert_authmethod == LDAP_AUTH_SASL ) {
1010 if ( ( li->idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1011 /* && ( !BER_BVISNULL( &op->o_conn->c_ndn ) || lc->lc_bound ) */ )
1013 /* already asserted in SASL via native authz */
1014 /* NOTE: the test on lc->lc_bound is used to trap
1015 * native authorization of anonymous users,
1016 * since in that case op->o_conn->c_ndn is NULL */
1020 } else if ( li->idassert_authz ) {
1022 struct berval authcDN;
1024 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1025 authcDN = slap_empty_bv;
1027 authcDN = op->o_conn->c_ndn;
1029 rc = slap_sasl_matches( op, li->idassert_authz,
1030 &authcDN, & authcDN );
1031 if ( rc != LDAP_SUCCESS ) {
1032 /* op->o_conn->c_ndn is not authorized
1033 * to use idassert */
1038 if ( op->o_proxy_authz ) {
1041 * 1) ignore the already set proxyAuthz control
1042 * 2) leave it in place, and don't set ours
1044 * 4) reject the operation
1046 * option (4) is very drastic
1047 * option (3) will make the remote server reject
1048 * the operation, thus being equivalent to (4)
1049 * option (2) will likely break the idassert
1050 * assumptions, so we cannot accept it;
1051 * option (1) means that we are contradicting
1052 * the client's reques.
1054 * I think (4) is the only correct choice.
1056 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1057 rs->sr_text = "proxyAuthz not allowed within namingContext";
1060 if ( op->o_do_not_cache && op->o_is_auth_check ) {
1061 mode = LDAP_BACK_IDASSERT_NOASSERT;
1064 mode = li->idassert_mode;
1068 case LDAP_BACK_IDASSERT_LEGACY:
1069 case LDAP_BACK_IDASSERT_SELF:
1070 /* original behavior:
1071 * assert the client's identity */
1072 if ( BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1073 assertedID = slap_empty_bv;
1075 assertedID = op->o_conn->c_ndn;
1079 case LDAP_BACK_IDASSERT_ANONYMOUS:
1080 /* assert "anonymous" */
1081 assertedID = slap_empty_bv;
1084 case LDAP_BACK_IDASSERT_NOASSERT:
1085 /* don't assert; bind as proxyauthzdn */
1088 case LDAP_BACK_IDASSERT_OTHERID:
1089 case LDAP_BACK_IDASSERT_OTHERDN:
1090 /* assert idassert DN */
1091 assertedID = li->idassert_authzID;
1098 if ( BER_BVISNULL( &assertedID ) ) {
1099 assertedID = slap_empty_bv;
1102 if ( op->o_ctrls ) {
1103 for ( i = 0; op->o_ctrls[ i ]; i++ )
1104 /* just count ctrls */ ;
1107 ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
1108 ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
1110 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1111 ctrls[ 0 ]->ldctl_iscritical = 1;
1113 switch ( li->idassert_mode ) {
1114 /* already in u:ID or dn:DN form */
1115 case LDAP_BACK_IDASSERT_OTHERID:
1116 case LDAP_BACK_IDASSERT_OTHERDN:
1117 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
1120 /* needs the dn: prefix */
1122 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1123 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
1124 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1125 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val + STRLENOF( "dn:" ),
1126 assertedID.bv_val, assertedID.bv_len + 1 );
1130 if ( op->o_ctrls ) {
1131 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1132 ctrls[ i + 1 ] = op->o_ctrls[ i ];
1135 ctrls[ i + 1 ] = NULL;
1138 if ( ctrls == NULL ) {
1139 ctrls = op->o_ctrls;
1148 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1150 LDAPControl **ctrls = *pctrls;
1152 /* we assume that the first control is the proxyAuthz
1153 * added by back-ldap, so it's the only one we explicitly
1155 if ( ctrls && ctrls != op->o_ctrls ) {
1156 assert( ctrls[ 0 ] );
1158 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1159 free( ctrls[ 0 ]->ldctl_value.bv_val );