1 /* acl.c - routines to parse and check acl's */
4 * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
5 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
13 #include <ac/socket.h>
14 #include <ac/string.h>
19 static AccessControl * acl_get(
20 AccessControl *ac, int *count,
21 Backend *be, Operation *op,
23 AttributeDescription *desc,
24 int nmatches, regmatch_t *matches );
26 static slap_control_t acl_mask(
27 AccessControl *ac, slap_mask_t *mask,
28 Backend *be, Connection *conn, Operation *op,
30 AttributeDescription *desc,
32 regmatch_t *matches );
34 #ifdef SLAPD_ACI_ENABLED
40 AttributeDescription *desc,
45 slap_access_t *deny );
48 static int regex_matches(
49 char *pat, char *str, char *buf, regmatch_t *matches);
50 static void string_expand(
51 char *newbuf, int bufsiz, char *pattern,
52 char *match, regmatch_t *matches);
54 char **aci_set_gather (void *cookie, char *name, char *attr);
55 static int aci_match_set ( struct berval *subj, Backend *be,
56 Entry *e, Connection *conn, Operation *op, int setref );
59 * access_allowed - check whether op->o_ndn is allowed the requested access
60 * to entry e, attribute attr, value val. if val is null, access to
61 * the whole attribute is assumed (all values).
63 * This routine loops through all access controls and calls
64 * acl_mask() on each applicable access control.
65 * The loop exits when a definitive answer is reached or
66 * or no more controls remain.
79 AttributeDescription *desc,
81 slap_access_t access )
86 char accessmaskbuf[ACCESSMASK_MAXLEN];
89 slap_control_t control;
91 regmatch_t matches[MAXREMATCHES];
94 assert( desc != NULL );
95 assert( access > ACL_NONE );
97 attr = desc->ad_cname.bv_val;
99 assert( attr != NULL );
102 LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
103 "access_allowed: conn %d %s access to \"%s\" \"%s\" requested\n",
104 conn ? conn->c_connid : -1, access2str( access ), e->e_dn, attr ));
106 Debug( LDAP_DEBUG_ACL,
107 "=> access_allowed: %s access to \"%s\" \"%s\" requested\n",
108 access2str( access ), e->e_dn, attr );
116 if ( be == NULL ) be = &backends[0];
117 assert( be != NULL );
119 /* grant database root access */
120 if ( be != NULL && be_isroot( be, op->o_ndn.bv_val ) ) {
122 LDAP_LOG(( "acl", LDAP_LEVEL_INFO,
123 "access_allowed: conn %d root access granted\n",
126 Debug( LDAP_DEBUG_ACL,
127 "<= root access granted\n",
134 * no-user-modification operational attributes are ignored
135 * by ACL_WRITE checking as any found here are not provided
138 if ( access >= ACL_WRITE && is_at_no_user_mod( desc->ad_type )
139 && desc != slap_schema.si_ad_entry
140 && desc != slap_schema.si_ad_children )
143 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
144 "access_allowed: conn %d NoUserMod Operational attribute: %s access granted\n",
145 conn->c_connid, attr ));
147 Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:"
148 " %s access granted\n",
154 /* use backend default access if no backend acls */
155 if( be != NULL && be->be_acl == NULL ) {
157 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
158 "access_allowed: conn %d backend default %s access %s to \"%s\"\n",
159 conn->c_connid, access2str( access ),
160 be->be_dfltaccess >= access ? "granted" : "denied", op->o_dn ));
162 Debug( LDAP_DEBUG_ACL,
163 "=> access_allowed: backend default %s access %s to \"%s\"\n",
164 access2str( access ),
165 be->be_dfltaccess >= access ? "granted" : "denied", op->o_dn );
167 return be->be_dfltaccess >= access;
170 /* be is always non-NULL */
171 /* use global default access if no global acls */
172 } else if ( be == NULL && global_acl == NULL ) {
174 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
175 "access_allowed: conn %d global default %s access %s to \"%s\"\n",
176 conn->c_connid, access2str( access ),
177 global_default_access >= access ? "granted" : "denied", op->o_dn ));
179 Debug( LDAP_DEBUG_ACL,
180 "=> access_allowed: global default %s access %s to \"%s\"\n",
181 access2str( access ),
182 global_default_access >= access ? "granted" : "denied", op->o_dn );
184 return global_default_access >= access;
189 memset(matches, '\0', sizeof(matches));
195 while((a = acl_get( a, &count, be, op, e, desc, MAXREMATCHES, matches )) != NULL)
199 for (i = 0; i < MAXREMATCHES && matches[i].rm_so > 0; i++) {
201 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
202 "access_allowed: conn %d match[%d]: %d %d ",
203 conn->c_connid, i, (int)matches[i].rm_so, (int)matches[i].rm_eo ));
205 Debug( LDAP_DEBUG_ACL, "=> match[%d]: %d %d ", i,
206 (int)matches[i].rm_so, (int)matches[i].rm_eo );
208 if( matches[i].rm_so <= matches[0].rm_eo ) {
210 for ( n = matches[i].rm_so; n < matches[i].rm_eo; n++) {
211 Debug( LDAP_DEBUG_ACL, "%c", e->e_ndn[n], 0, 0 );
215 LDAP_LOG(( "acl", LDAP_LEVEL_ARGS, "\n" ));
217 Debug( LDAP_DEBUG_ARGS, "\n", 0, 0, 0 );
221 control = acl_mask( a, &mask, be, conn, op,
222 e, desc, val, matches );
224 if ( control != ACL_BREAK ) {
228 memset(matches, '\0', sizeof(matches));
231 if ( ACL_IS_INVALID( mask ) ) {
233 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
234 "access_allowed: conn %d \"%s\" (%s) invalid!\n",
235 conn->c_connid, e->e_dn, attr ));
237 Debug( LDAP_DEBUG_ACL,
238 "=> access_allowed: \"%s\" (%s) invalid!\n",
243 } else if ( control == ACL_BREAK ) {
245 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
246 "access_allowed: conn %d no more rules\n", conn->c_connid ));
248 Debug( LDAP_DEBUG_ACL,
249 "=> access_allowed: no more rules\n", 0, 0, 0);
255 LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
256 "access_allowed: conn %d %s access %s by %s\n",
258 access2str( access ),
259 ACL_GRANT( mask, access ) ? "granted" : "denied",
260 accessmask2str( mask, accessmaskbuf ) ));
262 Debug( LDAP_DEBUG_ACL,
263 "=> access_allowed: %s access %s by %s\n",
264 access2str( access ),
265 ACL_GRANT(mask, access) ? "granted" : "denied",
266 accessmask2str( mask, accessmaskbuf ) );
268 return ACL_GRANT(mask, access);
272 * acl_get - return the acl applicable to entry e, attribute
273 * attr. the acl returned is suitable for use in subsequent calls to
274 * acl_access_allowed().
277 static AccessControl *
284 AttributeDescription *desc,
286 regmatch_t *matches )
292 assert( count != NULL );
293 assert( desc != NULL );
295 attr = desc->ad_cname.bv_val;
297 assert( attr != NULL );
312 dnlen = strlen(e->e_ndn);
314 for ( ; a != NULL; a = a->acl_next ) {
317 if (a->acl_dn_pat.bv_len != 0) {
318 if ( a->acl_dn_style == ACL_STYLE_REGEX ) {
320 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
321 "acl_get: dnpat [%d] %s nsub: %d\n",
322 *count, a->acl_dn_pat, (int) a->acl_dn_re.re_nsub ));
324 Debug( LDAP_DEBUG_ACL, "=> dnpat: [%d] %s nsub: %d\n",
325 *count, a->acl_dn_pat, (int) a->acl_dn_re.re_nsub );
327 if (regexec(&a->acl_dn_re, e->e_ndn, nmatch, matches, 0))
332 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
333 "acl_get: dn [%d] %s\n",
334 *count, a->acl_dn_pat ));
336 Debug( LDAP_DEBUG_ACL, "=> dn: [%d] %s\n",
337 *count, a->acl_dn_pat, 0 );
339 patlen = a->acl_dn_pat.bv_len;
340 if ( dnlen < patlen )
343 if ( a->acl_dn_style == ACL_STYLE_BASE ) {
344 /* base dn -- entire object DN must match */
345 if ( dnlen != patlen )
348 } else if ( a->acl_dn_style == ACL_STYLE_ONE ) {
351 if ( dnlen <= patlen )
354 if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) || DN_ESCAPE( e->e_ndn[dnlen - patlen - 2] ) )
357 rdnlen = dn_rdnlen( NULL, e->e_ndn );
358 if ( rdnlen != dnlen - patlen - 1 )
361 } else if ( a->acl_dn_style == ACL_STYLE_SUBTREE ) {
362 if ( dnlen > patlen && ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) || DN_ESCAPE( e->e_ndn[dnlen - patlen - 2] ) ) )
365 } else if ( a->acl_dn_style == ACL_STYLE_CHILDREN ) {
366 if ( dnlen <= patlen )
368 if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) || DN_ESCAPE( e->e_ndn[dnlen - patlen - 2] ) )
372 if ( strcmp( a->acl_dn_pat.bv_val, e->e_ndn + dnlen - patlen ) != 0 )
377 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
378 "acl_get: [%d] matched\n",
381 Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] matched\n",
386 if ( a->acl_filter != NULL ) {
387 ber_int_t rc = test_filter( NULL, NULL, NULL, e, a->acl_filter );
388 if ( rc != LDAP_COMPARE_TRUE ) {
394 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
395 "acl_get: [%d] check attr %s\n",
398 Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] check attr %s\n",
401 if ( attr == NULL || a->acl_attrs == NULL ||
402 ad_inlist( desc, a->acl_attrs ) )
405 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
406 "acl_get: [%d] acl %s attr: %s\n",
407 *count, e->e_dn, attr ));
409 Debug( LDAP_DEBUG_ACL,
410 "<= acl_get: [%d] acl %s attr: %s\n",
411 *count, e->e_dn, attr );
415 matches[0].rm_so = matches[0].rm_eo = -1;
419 LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
420 "acl_get: done.\n" ));
422 Debug( LDAP_DEBUG_ACL, "<= acl_get: done.\n", 0, 0, 0 );
429 * acl_mask - modifies mask based upon the given acl and the
430 * requested access to entry e, attribute attr, value val. if val
431 * is null, access to the whole attribute is assumed (all values).
433 * returns 0 access NOT allowed
437 static slap_control_t
445 AttributeDescription *desc,
450 int i, odnlen, patlen;
453 char accessmaskbuf[ACCESSMASK_MAXLEN];
458 assert( mask != NULL );
459 assert( desc != NULL );
461 attr = desc->ad_cname.bv_val;
463 assert( attr != NULL );
466 LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
467 "acl_mask: conn %d access to entry \"%s\", attr \"%s\" requested\n",
468 conn->c_connid, e->e_dn, attr ));
470 LDAP_LOG(( "acl", LDAP_LEVEL_ARGS,
471 " to %s by \"%s\", (%s) \n",
472 val ? "value" : "all values",
473 op->o_ndn ? op->o_ndn : "",
474 accessmask2str( *mask, accessmaskbuf ) ));
476 Debug( LDAP_DEBUG_ACL,
477 "=> acl_mask: access to entry \"%s\", attr \"%s\" requested\n",
480 Debug( LDAP_DEBUG_ACL,
481 "=> acl_mask: to %s by \"%s\", (%s) \n",
482 val ? "value" : "all values",
483 op->o_ndn.bv_val ? op->o_ndn.bv_val : "",
484 accessmask2str( *mask, accessmaskbuf ) );
487 for ( i = 1, b = a->acl_access; b != NULL; b = b->a_next, i++ ) {
488 slap_mask_t oldmask, modmask;
490 ACL_INVALIDATE( modmask );
492 /* AND <who> clauses */
493 if ( b->a_dn_pat.bv_len != 0 ) {
495 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
496 "acl_mask: conn %d check a_dn_pat: %s\n",
497 conn->c_connid, b->a_dn_pat.bv_val ));
499 Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n",
500 b->a_dn_pat.bv_val, 0, 0);
503 * if access applies to the entry itself, and the
504 * user is bound as somebody in the same namespace as
505 * the entry, OR the given dn matches the dn pattern
507 if ( b->a_dn_pat.bv_len == sizeof("anonymous") -1 &&
508 strcmp( b->a_dn_pat.bv_val, "anonymous" ) == 0 ) {
509 if (op->o_ndn.bv_len != 0 ) {
513 } else if ( b->a_dn_pat.bv_len == sizeof("users") - 1 &&
514 strcmp( b->a_dn_pat.bv_val, "users" ) == 0 ) {
515 if (op->o_ndn.bv_len == 0 ) {
519 } else if ( b->a_dn_pat.bv_len == sizeof("self") - 1 &&
520 strcmp( b->a_dn_pat.bv_val, "self" ) == 0 ) {
521 if( op->o_ndn.bv_len == 0 ) {
525 if ( e->e_dn == NULL || strcmp( e->e_ndn, op->o_ndn.bv_val ) != 0 ) {
529 } else if ( b->a_dn_style == ACL_STYLE_REGEX ) {
530 if ( b->a_dn_pat.bv_len != 1 ||
531 strcmp( b->a_dn_pat.bv_val, "*" ) != 0 ) {
532 int ret = regex_matches( b->a_dn_pat.bv_val,
533 op->o_ndn.bv_val, e->e_ndn, matches );
541 if ( e->e_dn == NULL )
544 patlen = b->a_dn_pat.bv_len;
545 odnlen = op->o_ndn.bv_len;
546 if ( odnlen < patlen )
549 if ( b->a_dn_style == ACL_STYLE_BASE ) {
550 /* base dn -- entire object DN must match */
551 if ( odnlen != patlen )
554 } else if ( b->a_dn_style == ACL_STYLE_ONE ) {
557 if ( odnlen <= patlen )
560 if ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) || DN_ESCAPE( op->o_ndn.bv_val[odnlen - patlen - 2] ) )
563 rdnlen = dn_rdnlen( NULL, op->o_ndn.bv_val );
564 if ( rdnlen != odnlen - patlen - 1 )
567 } else if ( b->a_dn_style == ACL_STYLE_SUBTREE ) {
568 if ( odnlen > patlen && ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) || DN_ESCAPE( op->o_ndn.bv_val[odnlen - patlen - 2] ) ) )
571 } else if ( b->a_dn_style == ACL_STYLE_CHILDREN ) {
572 if ( odnlen <= patlen )
574 if ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) || DN_ESCAPE( op->o_ndn.bv_val[odnlen - patlen - 2] ) )
578 if ( strcmp( b->a_dn_pat.bv_val, op->o_ndn.bv_val + odnlen - patlen ) != 0 )
584 if ( b->a_sockurl_pat != NULL ) {
586 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
587 "acl_mask: conn %d check a_sockurl_pat: %s\n",
588 conn->c_connid, b->a_sockurl_pat ));
590 Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n",
591 b->a_sockurl_pat, 0, 0 );
594 if ( strcmp( b->a_sockurl_pat, "*" ) != 0) {
595 if ( b->a_sockurl_style == ACL_STYLE_REGEX) {
596 if (!regex_matches( b->a_sockurl_pat, conn->c_listener_url,
597 e->e_ndn, matches ) )
602 if ( strcasecmp( b->a_sockurl_pat, conn->c_listener_url ) == 0 )
608 if ( b->a_domain_pat != NULL ) {
610 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
611 "acl_mask: conn %d check a_domain_pat: %s\n",
612 conn->c_connid, b->a_domain_pat ));
614 Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n",
615 b->a_domain_pat, 0, 0 );
617 if ( strcmp( b->a_domain_pat, "*" ) != 0) {
618 if ( b->a_domain_style == ACL_STYLE_REGEX) {
619 if (!regex_matches( b->a_domain_pat, conn->c_peer_domain,
620 e->e_ndn, matches ) )
625 if ( strcasecmp( b->a_domain_pat, conn->c_peer_domain ) == 0 )
631 if ( b->a_peername_pat != NULL ) {
633 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
634 "acl_mask: conn %d check a_perrname_path: %s\n",
635 conn->c_connid, b->a_peername_pat ));
637 Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n",
638 b->a_peername_pat, 0, 0 );
640 if ( strcmp( b->a_peername_pat, "*" ) != 0) {
641 if ( b->a_peername_style == ACL_STYLE_REGEX) {
642 if (!regex_matches( b->a_peername_pat, conn->c_peer_name,
643 e->e_ndn, matches ) )
648 if ( strcasecmp( b->a_peername_pat, conn->c_peer_name ) == 0 )
654 if ( b->a_sockname_pat != NULL ) {
656 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
657 "acl_mask: conn %d check a_sockname_path: %s\n",
658 conn->c_connid, b->a_sockname_pat ));
660 Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n",
661 b->a_sockname_pat, 0, 0 );
663 if ( strcmp( b->a_sockname_pat, "*" ) != 0) {
664 if ( b->a_sockname_style == ACL_STYLE_REGEX) {
665 if (!regex_matches( b->a_sockname_pat, conn->c_sock_name,
666 e->e_ndn, matches ) )
671 if ( strcasecmp( b->a_sockname_pat, conn->c_sock_name ) == 0 )
677 if ( b->a_dn_at != NULL && op->o_ndn.bv_len != 0 ) {
682 const char *attr = b->a_dn_at->ad_cname.bv_val;
684 assert( attr != NULL );
687 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
688 "acl_mask: conn %d check a_dn_pat: %s\n",
689 conn->c_connid, attr ));
691 Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n",
696 /* see if asker is listed in dnattr */
697 for( at = attrs_find( e->e_attrs, b->a_dn_at );
699 at = attrs_find( at->a_next, b->a_dn_at ) )
701 if( value_find( b->a_dn_at, at->a_vals, &bv ) == 0 ) {
709 /* have a dnattr match. if this is a self clause then
710 * the target must also match the op dn.
712 if ( b->a_dn_self ) {
713 /* check if the target is an attribute. */
716 /* target is attribute, check if the attribute value
719 rc = value_match( &match, b->a_dn_at,
720 b->a_dn_at->ad_type->sat_equality, 0,
722 /* on match error or no match, fail the ACL clause */
723 if (rc != LDAP_SUCCESS || match != 0 )
727 /* no dnattr match, check if this is a self clause */
728 if ( ! b->a_dn_self )
730 /* this is a self clause, check if the target is an
735 /* target is attribute, check if the attribute value
738 rc = value_match( &match, b->a_dn_at,
739 b->a_dn_at->ad_type->sat_equality, 0,
742 /* on match error or no match, fail the ACL clause */
743 if (rc != LDAP_SUCCESS || match != 0 )
748 if ( b->a_group_pat != NULL && op->o_ndn.bv_len != 0 ) {
751 /* b->a_group is an unexpanded entry name, expanded it should be an
752 * entry with objectclass group* and we test to see if odn is one of
753 * the values in the attribute group
755 /* see if asker is listed in dnattr */
756 if ( b->a_group_style == ACL_STYLE_REGEX ) {
757 string_expand(buf, sizeof(buf), b->a_group_pat, e->e_ndn, matches);
758 if ( dn_normalize(buf) == NULL ) {
759 /* did not expand to a valid dn */
763 strncpy( buf, b->a_group_pat, sizeof(buf) - 1 );
764 buf[sizeof(buf) - 1] = 0;
767 if (backend_group(be, conn, op, e, buf, op->o_ndn.bv_val,
768 b->a_group_oc, b->a_group_at) != 0)
774 if ( b->a_set_pat.bv_len != 0 ) {
775 if (aci_match_set( &b->a_set_pat, be, e, conn, op, 0 ) == 0) {
780 if ( b->a_authz.sai_ssf ) {
782 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
783 "acl_mask: conn %d check a_authz.sai_ssf: ACL %u > OP %u\n",
784 conn->c_connid, b->a_authz.sai_ssf, op->o_ssf ));
786 Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_ssf: ACL %u > OP %u\n",
787 b->a_authz.sai_ssf, op->o_ssf, 0 );
789 if ( b->a_authz.sai_ssf > op->o_ssf ) {
794 if ( b->a_authz.sai_transport_ssf ) {
796 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
797 "acl_mask: conn %d check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
798 conn->c_connid, b->a_authz.sai_transport_ssf, op->o_transport_ssf ));
800 Debug( LDAP_DEBUG_ACL,
801 "<= check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
802 b->a_authz.sai_transport_ssf, op->o_transport_ssf, 0 );
804 if ( b->a_authz.sai_transport_ssf > op->o_transport_ssf ) {
809 if ( b->a_authz.sai_tls_ssf ) {
811 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
812 "acl_mask: conn %d check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
813 conn->c_connid, b->a_authz.sai_tls_ssf, op->o_tls_ssf ));
815 Debug( LDAP_DEBUG_ACL,
816 "<= check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
817 b->a_authz.sai_tls_ssf, op->o_tls_ssf, 0 );
819 if ( b->a_authz.sai_tls_ssf > op->o_tls_ssf ) {
824 if ( b->a_authz.sai_sasl_ssf ) {
826 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
827 "acl_mask: conn %d check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
828 conn->c_connid, b->a_authz.sai_sasl_ssf, op->o_sasl_ssf ));
830 Debug( LDAP_DEBUG_ACL,
831 "<= check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
832 b->a_authz.sai_sasl_ssf, op->o_sasl_ssf, 0 );
834 if ( b->a_authz.sai_sasl_ssf > op->o_sasl_ssf ) {
839 #ifdef SLAPD_ACI_ENABLED
840 if ( b->a_aci_at != NULL ) {
842 slap_access_t grant, deny, tgrant, tdeny;
844 /* this case works different from the others above.
845 * since aci's themselves give permissions, we need
846 * to first check b->a_access_mask, the ACL's access level.
849 if( op->o_ndn.bv_len == 0 ) {
853 if ( e->e_dn == NULL ) {
857 /* first check if the right being requested
858 * is allowed by the ACL clause.
860 if ( ! ACL_GRANT( b->a_access_mask, *mask ) ) {
864 /* get the aci attribute */
865 at = attr_find( e->e_attrs, b->a_aci_at );
870 /* start out with nothing granted, nothing denied */
874 /* the aci is an multi-valued attribute. The
875 * rights are determined by OR'ing the individual
876 * rights given by the acis.
878 for ( i = 0; at->a_vals[i] != NULL; i++ ) {
879 if (aci_mask( be, conn, op,
880 e, desc, val, at->a_vals[i],
881 matches, &grant, &deny ) != 0)
888 /* remove anything that the ACL clause does not allow */
889 tgrant &= b->a_access_mask & ACL_PRIV_MASK;
890 tdeny &= ACL_PRIV_MASK;
892 /* see if we have anything to contribute */
893 if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) {
897 /* this could be improved by changing acl_mask so that it can deal with
898 * by clauses that return grant/deny pairs. Right now, it does either
899 * additive or subtractive rights, but not both at the same time. So,
900 * we need to combine the grant/deny pair into a single rights mask in
901 * a smart way: if either grant or deny is "empty", then we use the
902 * opposite as is, otherwise we remove any denied rights from the grant
903 * rights mask and construct an additive mask.
905 if (ACL_IS_INVALID(tdeny)) {
906 modmask = tgrant | ACL_PRIV_ADDITIVE;
908 } else if (ACL_IS_INVALID(tgrant)) {
909 modmask = tdeny | ACL_PRIV_SUBSTRACTIVE;
912 modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE;
918 modmask = b->a_access_mask;
922 LDAP_LOG(( "acl", LDAP_LEVEL_RESULTS,
923 "acl_mask: conn %d [%d] applying %s (%s)\n",
924 conn->c_connid, i, accessmask2str( modmask, accessmaskbuf),
925 b->a_type == ACL_CONTINUE ? "continue" : b->a_type == ACL_BREAK
926 ? "break" : "stop" ));
928 Debug( LDAP_DEBUG_ACL,
929 "<= acl_mask: [%d] applying %s (%s)\n",
930 i, accessmask2str( modmask, accessmaskbuf ),
931 b->a_type == ACL_CONTINUE
933 : b->a_type == ACL_BREAK
940 if( ACL_IS_ADDITIVE(modmask) ) {
942 ACL_PRIV_SET( *mask, modmask );
945 ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
947 } else if( ACL_IS_SUBTRACTIVE(modmask) ) {
948 /* substract privs */
949 ACL_PRIV_CLR( *mask, modmask );
952 ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
960 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
961 "acl_mask: conn %d [%d] mask: %s\n",
962 conn->c_connid, i, accessmask2str( *mask, accessmaskbuf) ));
964 Debug( LDAP_DEBUG_ACL,
965 "<= acl_mask: [%d] mask: %s\n",
966 i, accessmask2str(*mask, accessmaskbuf), 0 );
969 if( b->a_type == ACL_CONTINUE ) {
972 } else if ( b->a_type == ACL_BREAK ) {
980 /* implicit "by * none" clause */
984 LDAP_LOG(( "acl", LDAP_LEVEL_RESULTS,
985 "acl_mask: conn %d no more <who> clauses, returning %d (stop)\n",
986 conn->c_connid, accessmask2str( *mask, accessmaskbuf) ));
988 Debug( LDAP_DEBUG_ACL,
989 "<= acl_mask: no more <who> clauses, returning %s (stop)\n",
990 accessmask2str(*mask, accessmaskbuf), 0, 0 );
996 * acl_check_modlist - check access control on the given entry to see if
997 * it allows the given modifications by the user associated with op.
998 * returns 1 if mods allowed ok
1008 Modifications *mlist
1013 assert( be != NULL );
1015 /* short circuit root database access */
1016 if ( be_isroot( be, op->o_ndn.bv_val ) ) {
1018 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
1019 "acl_check_modlist: conn %d access granted to root user\n",
1022 Debug( LDAP_DEBUG_ACL,
1023 "<= acl_access_allowed: granted to database root\n",
1029 /* use backend default access if no backend acls */
1030 if( be != NULL && be->be_acl == NULL ) {
1032 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1033 "acl_check_modlist: conn %d backend default %s access %s to \"%s\"\n",
1034 conn->c_connid, access2str( ACL_WRITE ),
1035 be->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn ));
1037 Debug( LDAP_DEBUG_ACL,
1038 "=> access_allowed: backend default %s access %s to \"%s\"\n",
1039 access2str( ACL_WRITE ),
1040 be->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn );
1042 return be->be_dfltaccess >= ACL_WRITE;
1045 /* be is always non-NULL */
1046 /* use global default access if no global acls */
1047 } else if ( be == NULL && global_acl == NULL ) {
1049 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1050 "acl_check_modlist: conn %d global default %s access %s to \"%s\"\n",
1051 conn->c_connid, access2str( ACL_WRITE ),
1052 global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn ));
1054 Debug( LDAP_DEBUG_ACL,
1055 "=> access_allowed: global default %s access %s to \"%s\"\n",
1056 access2str( ACL_WRITE ),
1057 global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn );
1059 return global_default_access >= ACL_WRITE;
1063 for ( ; mlist != NULL; mlist = mlist->sml_next ) {
1065 * no-user-modification operational attributes are ignored
1066 * by ACL_WRITE checking as any found here are not provided
1069 if ( is_at_no_user_mod( mlist->sml_desc->ad_type ) ) {
1071 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1072 "acl_check_modlist: conn %d no-user-mod %s: modify access granted\n",
1073 conn->c_connid, mlist->sml_desc->ad_cname.bv_val ));
1075 Debug( LDAP_DEBUG_ACL, "acl: no-user-mod %s:"
1076 " modify access granted\n",
1077 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
1082 switch ( mlist->sml_op ) {
1083 case LDAP_MOD_REPLACE:
1085 if ( mlist->sml_bvalues == NULL ) {
1088 for ( i = 0; mlist->sml_bvalues[i] != NULL; i++ ) {
1089 if ( ! access_allowed( be, conn, op, e,
1090 mlist->sml_desc, mlist->sml_bvalues[i], ACL_WRITE ) )
1097 case LDAP_MOD_DELETE:
1098 if ( mlist->sml_bvalues == NULL ) {
1099 if ( ! access_allowed( be, conn, op, e,
1100 mlist->sml_desc, NULL, ACL_WRITE ) )
1106 for ( i = 0; mlist->sml_bvalues[i] != NULL; i++ ) {
1107 if ( ! access_allowed( be, conn, op, e,
1108 mlist->sml_desc, mlist->sml_bvalues[i], ACL_WRITE ) )
1121 aci_bvstrdup( struct berval *bv )
1125 s = (char *)ch_malloc(bv->bv_len + 1);
1127 AC_MEMCPY(s, bv->bv_val, bv->bv_len);
1133 #ifdef SLAPD_ACI_ENABLED
1141 res = strncasecmp( s, bv->bv_val, bv->bv_len );
1145 if (len > (int)bv->bv_len)
1147 if (len < (int)bv->bv_len)
1155 struct berval *list,
1169 while (len >= 0 && --ix >= 0) {
1170 while (--len >= 0 && *p++ != sep) ;
1172 while (len >= 0 && *p == ' ') {
1183 while (--len >= 0 && *p != sep) {
1187 while (bv->bv_len > 0 && *--p == ' ')
1193 aci_set_gather (void *cookie, char *name, char *attr)
1200 } *cp = (void *)cookie;
1201 struct berval **bvals = NULL;
1206 /* this routine needs to return the bervals instead of
1207 * plain strings, since syntax is not known. It should
1208 * also return the syntax or some "comparison cookie".
1211 if ((ndn = ch_strdup(name)) != NULL) {
1212 if (dn_normalize(ndn) != NULL) {
1214 AttributeDescription *desc = NULL;
1215 if (slap_str2ad(attr, &desc, &text) == LDAP_SUCCESS) {
1216 backend_attribute(cp->be, NULL /*cp->conn*/,
1217 NULL /*cp->op*/, cp->e,
1219 if (bvals != NULL) {
1220 for (i = 0; bvals[i] != NULL; i++) { }
1221 vals = ch_calloc(i + 1, sizeof(char *));
1224 vals[i] = bvals[i]->bv_val;
1225 bvals[i]->bv_val = NULL;
1228 ber_bvecfree(bvals);
1239 struct berval *subj,
1257 set = aci_bvstrdup(subj);
1262 struct berval **bvals;
1264 AttributeDescription *desc = NULL;
1266 /* format of string is "entry/setAttrName" */
1267 if (aci_get_part(subj, 0, '/', &bv) < 0) {
1271 subjdn = aci_bvstrdup(&bv);
1272 if ( subjdn == NULL ) {
1276 if ( aci_get_part(subj, 1, '/', &bv) < 0 ) {
1277 setat = ch_strdup( SLAPD_ACI_SET_ATTR );
1279 setat = aci_bvstrdup(&bv);
1281 if ( setat != NULL ) {
1282 if ( dn_normalize(subjdn) != NULL
1283 && slap_str2ad(setat, &desc, &text) == LDAP_SUCCESS )
1285 backend_attribute(be, NULL, NULL, e,
1286 subjdn, desc, &bvals);
1287 if ( bvals != NULL ) {
1288 if ( bvals[0] != NULL )
1289 set = ch_strdup(bvals[0]->bv_val);
1290 ber_bvecfree(bvals);
1303 rc = (set_filter(aci_set_gather, &cookie, set, op->o_ndn.bv_val, e->e_ndn, NULL) > 0);
1309 #ifdef SLAPD_ACI_ENABLED
1311 aci_list_map_rights(
1312 struct berval *list )
1319 for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
1322 switch (*bv.bv_val) {
1324 ACL_PRIV_SET(mask, ACL_PRIV_COMPARE);
1327 /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt defines
1328 * the right 's' to mean "set", but in the examples states
1329 * that the right 's' means "search". The latter definition
1332 ACL_PRIV_SET(mask, ACL_PRIV_SEARCH);
1335 ACL_PRIV_SET(mask, ACL_PRIV_READ);
1338 ACL_PRIV_SET(mask, ACL_PRIV_WRITE);
1341 /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt does not
1342 * define any equivalent to the AUTH right, so I've just used
1345 ACL_PRIV_SET(mask, ACL_PRIV_AUTH);
1357 struct berval *list,
1359 struct berval *val )
1361 struct berval bv, left, right;
1364 for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
1365 if (aci_get_part(&bv, 0, '=', &left) < 0
1366 || aci_get_part(&bv, 1, '=', &right) < 0)
1368 if (aci_strbvcmp(attr, &bv) == 0)
1370 } else if (val == NULL) {
1371 if (aci_strbvcmp(attr, &left) == 0)
1374 if (aci_strbvcmp(attr, &left) == 0) {
1375 /* this is experimental code that implements a
1376 * simple (prefix) match of the attribute value.
1377 * the ACI draft does not provide for aci's that
1378 * apply to specific values, but it would be
1379 * nice to have. If the <attr> part of an aci's
1380 * rights list is of the form <attr>=<value>,
1381 * that means the aci applies only to attrs with
1382 * the given value. Furthermore, if the attr is
1383 * of the form <attr>=<value>*, then <value> is
1384 * treated as a prefix, and the aci applies to
1385 * any value with that prefix.
1387 * Ideally, this would allow r.e. matches.
1389 if (aci_get_part(&right, 0, '*', &left) < 0
1390 || right.bv_len <= left.bv_len)
1392 if (aci_strbvcmp(val->bv_val, &right) == 0)
1394 } else if (val->bv_len >= left.bv_len) {
1395 if (strncasecmp( val->bv_val, left.bv_val, left.bv_len ) == 0)
1404 static slap_access_t
1405 aci_list_get_attr_rights(
1406 struct berval *list,
1408 struct berval *val )
1414 /* loop through each rights/attr pair, skip first part (action) */
1416 for (i = 1; aci_get_part(list, i + 1, ';', &bv) >= 0; i += 2) {
1417 if (aci_list_has_attr(&bv, attr, val) == 0)
1419 if (aci_get_part(list, i, ';', &bv) < 0)
1421 mask |= aci_list_map_rights(&bv);
1427 aci_list_get_rights(
1428 struct berval *list,
1431 slap_access_t *grant,
1432 slap_access_t *deny )
1434 struct berval perm, actn;
1435 slap_access_t *mask;
1438 if (attr == NULL || *attr == 0 || strcasecmp(attr, "entry") == 0) {
1445 /* loop through each permissions clause */
1446 for (i = 0; aci_get_part(list, i, '$', &perm) >= 0; i++) {
1447 if (aci_get_part(&perm, 0, ';', &actn) < 0)
1449 if (aci_strbvcmp( "grant", &actn ) == 0) {
1451 } else if (aci_strbvcmp( "deny", &actn ) == 0) {
1458 *mask |= aci_list_get_attr_rights(&perm, attr, val);
1459 *mask |= aci_list_get_attr_rights(&perm, "[all]", NULL);
1466 struct berval *subj,
1467 const char *defgrpoc,
1468 const char *defgrpat,
1477 char *subjdn, *grpdn = NULL;
1480 ObjectClass *grp_oc = NULL;
1481 AttributeDescription *grp_ad = NULL;
1485 /* format of string is "group/objectClassValue/groupAttrName" */
1486 if (aci_get_part(subj, 0, '/', &bv) < 0) {
1490 subjdn = aci_bvstrdup(&bv);
1491 if (subjdn == NULL) {
1495 if (aci_get_part(subj, 1, '/', &bv) < 0) {
1496 grpoc = ch_strdup( defgrpoc );
1498 grpoc = aci_bvstrdup(&bv);
1501 if (aci_get_part(subj, 2, '/', &bv) < 0) {
1502 grpat = ch_strdup( defgrpat );
1504 grpat = aci_bvstrdup(&bv);
1507 rc = slap_str2ad( grpat, &grp_ad, &text );
1508 if( rc != LDAP_SUCCESS ) {
1514 grp_oc = oc_find( grpoc );
1515 grpdn = (char *)ch_malloc(1024);
1517 if (grp_oc != NULL && grp_ad != NULL && grpdn != NULL) {
1518 string_expand(grpdn, 1024, subjdn, e->e_ndn, matches);
1519 if ( dn_normalize(grpdn) != NULL ) {
1520 rc = (backend_group(be, conn, op, e, grpdn, op->o_ndn.bv_val, grp_oc, grp_ad) == 0);
1538 AttributeDescription *desc,
1541 regmatch_t *matches,
1542 slap_access_t *grant,
1546 struct berval bv, perms, sdn;
1549 char *attr = desc->ad_cname.bv_val;
1551 assert( attr != NULL );
1553 /* parse an aci of the form:
1554 oid#scope#action;rights;attr;rights;attr$action;rights;attr;rights;attr#dnType#subjectDN
1556 See draft-ietf-ldapext-aci-model-04.txt section 9.1 for
1557 a full description of the format for this attribute.
1559 For now, this routine only supports scope=entry.
1562 /* check that the aci has all 5 components */
1563 if (aci_get_part(aci, 4, '#', NULL) < 0)
1566 /* check that the aci family is supported */
1567 if (aci_get_part(aci, 0, '#', &bv) < 0)
1570 /* check that the scope is "entry" */
1571 if (aci_get_part(aci, 1, '#', &bv) < 0
1572 || aci_strbvcmp( "entry", &bv ) != 0)
1577 /* get the list of permissions clauses, bail if empty */
1578 if (aci_get_part(aci, 2, '#', &perms) <= 0)
1581 /* check if any permissions allow desired access */
1582 if (aci_list_get_rights(&perms, attr, val, grant, deny) == 0)
1585 /* see if we have a DN match */
1586 if (aci_get_part(aci, 3, '#', &bv) < 0)
1589 if (aci_get_part(aci, 4, '#', &sdn) < 0)
1592 if (aci_strbvcmp( "access-id", &bv ) == 0) {
1593 subjdn = aci_bvstrdup(&sdn);
1597 if ( dn_normalize(subjdn) != NULL )
1598 if (strcasecmp(op->o_ndn.bv_val, subjdn) != 0)
1604 if (aci_strbvcmp( "self", &bv ) == 0) {
1605 if (strcmp(op->o_ndn.bv_val, e->e_ndn) == 0)
1608 } else if (aci_strbvcmp( "dnattr", &bv ) == 0) {
1609 char *dnattr = aci_bvstrdup(&sdn);
1611 AttributeDescription *ad = NULL;
1614 rc = slap_str2ad( dnattr, &ad, &text );
1617 if( rc != LDAP_SUCCESS ) {
1625 for(at = attrs_find( e->e_attrs, ad );
1627 at = attrs_find( at->a_next, ad ) )
1629 if (value_find( ad, at->a_vals, &bv) == 0 ) {
1638 } else if (aci_strbvcmp( "group", &bv ) == 0) {
1639 if (aci_group_member(&sdn, SLAPD_GROUP_CLASS, SLAPD_GROUP_ATTR, be, e, conn, op, matches))
1642 } else if (aci_strbvcmp( "role", &bv ) == 0) {
1643 if (aci_group_member(&sdn, SLAPD_ROLE_CLASS, SLAPD_ROLE_ATTR, be, e, conn, op, matches))
1646 } else if (aci_strbvcmp( "set", &bv ) == 0) {
1647 if (aci_match_set(&sdn, be, e, conn, op, 0))
1650 } else if (aci_strbvcmp( "set-ref", &bv ) == 0) {
1651 if (aci_match_set(&sdn, be, e, conn, op, 1))
1659 #endif /* SLAPD_ACI_ENABLED */
1667 regmatch_t *matches)
1676 bufsiz--; /* leave space for lone $ */
1679 for ( dp = newbuf, sp = pat; size < bufsiz && *sp ; sp++) {
1680 /* did we previously see a $ */
1685 } else if (*sp >= '0' && *sp <= '9' ) {
1692 i = matches[n].rm_so;
1693 l = matches[n].rm_eo;
1694 for ( ; size < 512 && i < l; size++, i++ ) {
1712 /* must have ended with a single $ */
1720 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1721 "string_expand: pattern = %s\n", pat ));
1722 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1723 "string_expand: expanded = %s\n", newbuf ));
1725 Debug( LDAP_DEBUG_TRACE, "=> string_expand: pattern: %s\n", pat, 0, 0 );
1726 Debug( LDAP_DEBUG_TRACE, "=> string_expand: expanded: %s\n", newbuf, 0, 0 );
1732 char *pat, /* pattern to expand and match against */
1733 char *str, /* string to match against pattern */
1734 char *buf, /* buffer with $N expansion variables */
1735 regmatch_t *matches /* offsets in buffer for $N expansion variables */
1742 if(str == NULL) str = "";
1744 string_expand(newbuf, sizeof(newbuf), pat, buf, matches);
1745 if (( rc = regcomp(&re, newbuf, REG_EXTENDED|REG_ICASE))) {
1747 regerror(rc, &re, error, sizeof(error));
1750 LDAP_LOG(( "aci", LDAP_LEVEL_ERR,
1751 "regex_matches: compile( \"%s\", \"%s\") failed %s\n",
1754 Debug( LDAP_DEBUG_TRACE,
1755 "compile( \"%s\", \"%s\") failed %s\n",
1761 rc = regexec(&re, str, 0, NULL, 0);
1765 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL2,
1766 "regex_matches: string: %s\n", str ));
1767 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL2,
1768 "regex_matches: rc: %d %s\n",
1769 rc, rc ? "matches" : "no matches" ));
1771 Debug( LDAP_DEBUG_TRACE,
1772 "=> regex_matches: string: %s\n", str, 0, 0 );
1773 Debug( LDAP_DEBUG_TRACE,
1774 "=> regex_matches: rc: %d %s\n",
1775 rc, !rc ? "matches" : "no matches", 0 );