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 ) ) {
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 != NULL) {
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 = strlen( a->acl_dn_pat );
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, 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 ? op->o_ndn : "",
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 != NULL ) {
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 ));
499 Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n",
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 ( strcmp( b->a_dn_pat, "anonymous" ) == 0 ) {
508 if (op->o_ndn != NULL && op->o_ndn[0] != '\0' ) {
512 } else if ( strcmp( b->a_dn_pat, "users" ) == 0 ) {
513 if (op->o_ndn == NULL || op->o_ndn[0] == '\0' ) {
517 } else if ( strcmp( b->a_dn_pat, "self" ) == 0 ) {
518 if( op->o_ndn == NULL || op->o_ndn[0] == '\0' ) {
522 if ( e->e_dn == NULL || strcmp( e->e_ndn, op->o_ndn ) != 0 ) {
526 } else if ( b->a_dn_style == ACL_STYLE_REGEX ) {
527 if ( strcmp( b->a_dn_pat, "*" ) != 0 ) {
528 int ret = regex_matches( b->a_dn_pat,
529 op->o_ndn, e->e_ndn, matches );
537 if ( e->e_dn == NULL )
540 patlen = strlen( b->a_dn_pat );
541 odnlen = strlen( op->o_ndn );
542 if ( odnlen < patlen )
545 if ( b->a_dn_style == ACL_STYLE_BASE ) {
546 /* base dn -- entire object DN must match */
547 if ( odnlen != patlen )
550 } else if ( b->a_dn_style == ACL_STYLE_ONE ) {
553 if ( odnlen <= patlen )
556 if ( !DN_SEPARATOR( op->o_ndn[odnlen - patlen - 1] ) || DN_ESCAPE( op->o_ndn[odnlen - patlen - 2] ) )
559 rdnlen = dn_rdnlen( NULL, op->o_ndn );
560 if ( rdnlen != odnlen - patlen - 1 )
563 } else if ( b->a_dn_style == ACL_STYLE_SUBTREE ) {
564 if ( odnlen > patlen && ( !DN_SEPARATOR( op->o_ndn[odnlen - patlen - 1] ) || DN_ESCAPE( op->o_ndn[odnlen - patlen - 2] ) ) )
567 } else if ( b->a_dn_style == ACL_STYLE_CHILDREN ) {
568 if ( odnlen <= patlen )
570 if ( !DN_SEPARATOR( op->o_ndn[odnlen - patlen - 1] ) || DN_ESCAPE( op->o_ndn[odnlen - patlen - 2] ) )
574 if ( strcmp( b->a_dn_pat, op->o_ndn + odnlen - patlen ) != 0 )
580 if ( b->a_sockurl_pat != NULL ) {
582 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
583 "acl_mask: conn %d check a_sockurl_pat: %s\n",
584 conn->c_connid, b->a_sockurl_pat ));
586 Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n",
587 b->a_sockurl_pat, 0, 0 );
590 if ( strcmp( b->a_sockurl_pat, "*" ) != 0) {
591 if ( b->a_sockurl_style == ACL_STYLE_REGEX) {
592 if (!regex_matches( b->a_sockurl_pat, conn->c_listener_url,
593 e->e_ndn, matches ) )
598 if ( strcasecmp( b->a_sockurl_pat, conn->c_listener_url ) == 0 )
604 if ( b->a_domain_pat != NULL ) {
606 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
607 "acl_mask: conn %d check a_domain_pat: %s\n",
608 conn->c_connid, b->a_domain_pat ));
610 Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n",
611 b->a_domain_pat, 0, 0 );
613 if ( strcmp( b->a_domain_pat, "*" ) != 0) {
614 if ( b->a_domain_style == ACL_STYLE_REGEX) {
615 if (!regex_matches( b->a_domain_pat, conn->c_peer_domain,
616 e->e_ndn, matches ) )
621 if ( strcasecmp( b->a_domain_pat, conn->c_peer_domain ) == 0 )
627 if ( b->a_peername_pat != NULL ) {
629 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
630 "acl_mask: conn %d check a_perrname_path: %s\n",
631 conn->c_connid, b->a_peername_pat ));
633 Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n",
634 b->a_peername_pat, 0, 0 );
636 if ( strcmp( b->a_peername_pat, "*" ) != 0) {
637 if ( b->a_peername_style == ACL_STYLE_REGEX) {
638 if (!regex_matches( b->a_peername_pat, conn->c_peer_name,
639 e->e_ndn, matches ) )
644 if ( strcasecmp( b->a_peername_pat, conn->c_peer_name ) == 0 )
650 if ( b->a_sockname_pat != NULL ) {
652 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
653 "acl_mask: conn %d check a_sockname_path: %s\n",
654 conn->c_connid, b->a_sockname_pat ));
656 Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n",
657 b->a_sockname_pat, 0, 0 );
659 if ( strcmp( b->a_sockname_pat, "*" ) != 0) {
660 if ( b->a_sockname_style == ACL_STYLE_REGEX) {
661 if (!regex_matches( b->a_sockname_pat, conn->c_sock_name,
662 e->e_ndn, matches ) )
667 if ( strcasecmp( b->a_sockname_pat, conn->c_sock_name ) == 0 )
673 if ( b->a_dn_at != NULL && op->o_ndn != NULL ) {
678 const char *attr = b->a_dn_at->ad_cname.bv_val;
680 assert( attr != NULL );
683 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
684 "acl_mask: conn %d check a_dn_pat: %s\n",
685 conn->c_connid, attr ));
687 Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n",
690 bv.bv_val = op->o_ndn;
691 bv.bv_len = strlen( bv.bv_val );
693 /* see if asker is listed in dnattr */
694 for( at = attrs_find( e->e_attrs, b->a_dn_at );
696 at = attrs_find( at->a_next, b->a_dn_at ) )
698 if( value_find( b->a_dn_at, at->a_vals, &bv ) == 0 ) {
706 /* have a dnattr match. if this is a self clause then
707 * the target must also match the op dn.
709 if ( b->a_dn_self ) {
710 /* check if the target is an attribute. */
713 /* target is attribute, check if the attribute value
716 rc = value_match( &match, b->a_dn_at,
717 b->a_dn_at->ad_type->sat_equality, 0,
719 /* on match error or no match, fail the ACL clause */
720 if (rc != LDAP_SUCCESS || match != 0 )
724 /* no dnattr match, check if this is a self clause */
725 if ( ! b->a_dn_self )
727 /* this is a self clause, check if the target is an
732 /* target is attribute, check if the attribute value
735 rc = value_match( &match, b->a_dn_at,
736 b->a_dn_at->ad_type->sat_equality, 0,
739 /* on match error or no match, fail the ACL clause */
740 if (rc != LDAP_SUCCESS || match != 0 )
745 if ( b->a_group_pat != NULL && op->o_ndn != NULL ) {
748 /* b->a_group is an unexpanded entry name, expanded it should be an
749 * entry with objectclass group* and we test to see if odn is one of
750 * the values in the attribute group
752 /* see if asker is listed in dnattr */
753 if ( b->a_group_style == ACL_STYLE_REGEX ) {
754 string_expand(buf, sizeof(buf), b->a_group_pat, e->e_ndn, matches);
755 if ( dn_normalize(buf) == NULL ) {
756 /* did not expand to a valid dn */
760 strncpy( buf, b->a_group_pat, sizeof(buf) - 1 );
761 buf[sizeof(buf) - 1] = 0;
764 if (backend_group(be, conn, op, e, buf, op->o_ndn,
765 b->a_group_oc, b->a_group_at) != 0)
771 if ( b->a_set_pat != NULL ) {
774 bv.bv_val = b->a_set_pat;
775 bv.bv_len = strlen(b->a_set_pat);
776 if (aci_match_set( &bv, be, e, conn, op, 0 ) == 0) {
781 if ( b->a_authz.sai_ssf ) {
783 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
784 "acl_mask: conn %d check a_authz.sai_ssf: ACL %u > OP %u\n",
785 conn->c_connid, b->a_authz.sai_ssf, op->o_ssf ));
787 Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_ssf: ACL %u > OP %u\n",
788 b->a_authz.sai_ssf, op->o_ssf, 0 );
790 if ( b->a_authz.sai_ssf > op->o_ssf ) {
795 if ( b->a_authz.sai_transport_ssf ) {
797 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
798 "acl_mask: conn %d check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
799 conn->c_connid, b->a_authz.sai_transport_ssf, op->o_transport_ssf ));
801 Debug( LDAP_DEBUG_ACL,
802 "<= check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
803 b->a_authz.sai_transport_ssf, op->o_transport_ssf, 0 );
805 if ( b->a_authz.sai_transport_ssf > op->o_transport_ssf ) {
810 if ( b->a_authz.sai_tls_ssf ) {
812 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
813 "acl_mask: conn %d check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
814 conn->c_connid, b->a_authz.sai_tls_ssf, op->o_tls_ssf ));
816 Debug( LDAP_DEBUG_ACL,
817 "<= check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
818 b->a_authz.sai_tls_ssf, op->o_tls_ssf, 0 );
820 if ( b->a_authz.sai_tls_ssf > op->o_tls_ssf ) {
825 if ( b->a_authz.sai_sasl_ssf ) {
827 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
828 "acl_mask: conn %d check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
829 conn->c_connid, b->a_authz.sai_sasl_ssf, op->o_sasl_ssf ));
831 Debug( LDAP_DEBUG_ACL,
832 "<= check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
833 b->a_authz.sai_sasl_ssf, op->o_sasl_ssf, 0 );
835 if ( b->a_authz.sai_sasl_ssf > op->o_sasl_ssf ) {
840 #ifdef SLAPD_ACI_ENABLED
841 if ( b->a_aci_at != NULL ) {
843 slap_access_t grant, deny, tgrant, tdeny;
845 /* this case works different from the others above.
846 * since aci's themselves give permissions, we need
847 * to first check b->a_access_mask, the ACL's access level.
850 if( op->o_ndn == NULL || op->o_ndn[0] == '\0' ) {
854 if ( e->e_dn == NULL ) {
858 /* first check if the right being requested
859 * is allowed by the ACL clause.
861 if ( ! ACL_GRANT( b->a_access_mask, *mask ) ) {
865 /* get the aci attribute */
866 at = attr_find( e->e_attrs, b->a_aci_at );
871 /* start out with nothing granted, nothing denied */
875 /* the aci is an multi-valued attribute. The
876 * rights are determined by OR'ing the individual
877 * rights given by the acis.
879 for ( i = 0; at->a_vals[i] != NULL; i++ ) {
880 if (aci_mask( be, conn, op,
881 e, desc, val, at->a_vals[i],
882 matches, &grant, &deny ) != 0)
889 /* remove anything that the ACL clause does not allow */
890 tgrant &= b->a_access_mask & ACL_PRIV_MASK;
891 tdeny &= ACL_PRIV_MASK;
893 /* see if we have anything to contribute */
894 if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) {
898 /* this could be improved by changing acl_mask so that it can deal with
899 * by clauses that return grant/deny pairs. Right now, it does either
900 * additive or subtractive rights, but not both at the same time. So,
901 * we need to combine the grant/deny pair into a single rights mask in
902 * a smart way: if either grant or deny is "empty", then we use the
903 * opposite as is, otherwise we remove any denied rights from the grant
904 * rights mask and construct an additive mask.
906 if (ACL_IS_INVALID(tdeny)) {
907 modmask = tgrant | ACL_PRIV_ADDITIVE;
909 } else if (ACL_IS_INVALID(tgrant)) {
910 modmask = tdeny | ACL_PRIV_SUBSTRACTIVE;
913 modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE;
919 modmask = b->a_access_mask;
923 LDAP_LOG(( "acl", LDAP_LEVEL_RESULTS,
924 "acl_mask: conn %d [%d] applying %s (%s)\n",
925 conn->c_connid, i, accessmask2str( modmask, accessmaskbuf),
926 b->a_type == ACL_CONTINUE ? "continue" : b->a_type == ACL_BREAK
927 ? "break" : "stop" ));
929 Debug( LDAP_DEBUG_ACL,
930 "<= acl_mask: [%d] applying %s (%s)\n",
931 i, accessmask2str( modmask, accessmaskbuf ),
932 b->a_type == ACL_CONTINUE
934 : b->a_type == ACL_BREAK
941 if( ACL_IS_ADDITIVE(modmask) ) {
943 ACL_PRIV_SET( *mask, modmask );
946 ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
948 } else if( ACL_IS_SUBTRACTIVE(modmask) ) {
949 /* substract privs */
950 ACL_PRIV_CLR( *mask, modmask );
953 ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
961 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
962 "acl_mask: conn %d [%d] mask: %s\n",
963 conn->c_connid, i, accessmask2str( *mask, accessmaskbuf) ));
965 Debug( LDAP_DEBUG_ACL,
966 "<= acl_mask: [%d] mask: %s\n",
967 i, accessmask2str(*mask, accessmaskbuf), 0 );
970 if( b->a_type == ACL_CONTINUE ) {
973 } else if ( b->a_type == ACL_BREAK ) {
981 /* implicit "by * none" clause */
985 LDAP_LOG(( "acl", LDAP_LEVEL_RESULTS,
986 "acl_mask: conn %d no more <who> clauses, returning %d (stop)\n",
987 conn->c_connid, accessmask2str( *mask, accessmaskbuf) ));
989 Debug( LDAP_DEBUG_ACL,
990 "<= acl_mask: no more <who> clauses, returning %s (stop)\n",
991 accessmask2str(*mask, accessmaskbuf), 0, 0 );
997 * acl_check_modlist - check access control on the given entry to see if
998 * it allows the given modifications by the user associated with op.
999 * returns 1 if mods allowed ok
1000 * 0 mods not allowed
1009 Modifications *mlist
1014 assert( be != NULL );
1016 /* short circuit root database access */
1017 if ( be_isroot( be, op->o_ndn ) ) {
1019 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
1020 "acl_check_modlist: conn %d access granted to root user\n",
1023 Debug( LDAP_DEBUG_ACL,
1024 "<= acl_access_allowed: granted to database root\n",
1030 /* use backend default access if no backend acls */
1031 if( be != NULL && be->be_acl == NULL ) {
1033 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1034 "acl_check_modlist: conn %d backend default %s access %s to \"%s\"\n",
1035 conn->c_connid, access2str( ACL_WRITE ),
1036 be->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn ));
1038 Debug( LDAP_DEBUG_ACL,
1039 "=> access_allowed: backend default %s access %s to \"%s\"\n",
1040 access2str( ACL_WRITE ),
1041 be->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn );
1043 return be->be_dfltaccess >= ACL_WRITE;
1046 /* be is always non-NULL */
1047 /* use global default access if no global acls */
1048 } else if ( be == NULL && global_acl == NULL ) {
1050 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1051 "acl_check_modlist: conn %d global default %s access %s to \"%s\"\n",
1052 conn->c_connid, access2str( ACL_WRITE ),
1053 global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn ));
1055 Debug( LDAP_DEBUG_ACL,
1056 "=> access_allowed: global default %s access %s to \"%s\"\n",
1057 access2str( ACL_WRITE ),
1058 global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn );
1060 return global_default_access >= ACL_WRITE;
1064 for ( ; mlist != NULL; mlist = mlist->sml_next ) {
1066 * no-user-modification operational attributes are ignored
1067 * by ACL_WRITE checking as any found here are not provided
1070 if ( is_at_no_user_mod( mlist->sml_desc->ad_type ) ) {
1072 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1073 "acl_check_modlist: conn %d no-user-mod %s: modify access granted\n",
1074 conn->c_connid, mlist->sml_desc->ad_cname.bv_val ));
1076 Debug( LDAP_DEBUG_ACL, "acl: no-user-mod %s:"
1077 " modify access granted\n",
1078 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
1083 switch ( mlist->sml_op ) {
1084 case LDAP_MOD_REPLACE:
1086 if ( mlist->sml_bvalues == NULL ) {
1089 for ( i = 0; mlist->sml_bvalues[i] != NULL; i++ ) {
1090 if ( ! access_allowed( be, conn, op, e,
1091 mlist->sml_desc, mlist->sml_bvalues[i], ACL_WRITE ) )
1098 case LDAP_MOD_DELETE:
1099 if ( mlist->sml_bvalues == NULL ) {
1100 if ( ! access_allowed( be, conn, op, e,
1101 mlist->sml_desc, NULL, ACL_WRITE ) )
1107 for ( i = 0; mlist->sml_bvalues[i] != NULL; i++ ) {
1108 if ( ! access_allowed( be, conn, op, e,
1109 mlist->sml_desc, mlist->sml_bvalues[i], ACL_WRITE ) )
1122 aci_bvstrdup( struct berval *bv )
1126 s = (char *)ch_malloc(bv->bv_len + 1);
1128 AC_MEMCPY(s, bv->bv_val, bv->bv_len);
1134 #ifdef SLAPD_ACI_ENABLED
1142 res = strncasecmp( s, bv->bv_val, bv->bv_len );
1146 if (len > (int)bv->bv_len)
1148 if (len < (int)bv->bv_len)
1156 struct berval *list,
1170 while (len >= 0 && --ix >= 0) {
1171 while (--len >= 0 && *p++ != sep) ;
1173 while (len >= 0 && *p == ' ') {
1184 while (--len >= 0 && *p != sep) {
1188 while (bv->bv_len > 0 && *--p == ' ')
1194 aci_set_gather (void *cookie, char *name, char *attr)
1201 } *cp = (void *)cookie;
1202 struct berval **bvals = NULL;
1207 /* this routine needs to return the bervals instead of
1208 * plain strings, since syntax is not known. It should
1209 * also return the syntax or some "comparison cookie".
1212 if ((ndn = ch_strdup(name)) != NULL) {
1213 if (dn_normalize(ndn) != NULL) {
1215 AttributeDescription *desc = NULL;
1216 if (slap_str2ad(attr, &desc, &text) == LDAP_SUCCESS) {
1217 backend_attribute(cp->be, NULL /*cp->conn*/,
1218 NULL /*cp->op*/, cp->e,
1220 if (bvals != NULL) {
1221 for (i = 0; bvals[i] != NULL; i++) { }
1222 vals = ch_calloc(i + 1, sizeof(char *));
1225 vals[i] = bvals[i]->bv_val;
1226 bvals[i]->bv_val = NULL;
1229 ber_bvecfree(bvals);
1240 struct berval *subj,
1258 set = aci_bvstrdup(subj);
1263 struct berval **bvals;
1265 AttributeDescription *desc = NULL;
1267 /* format of string is "entry/setAttrName" */
1268 if (aci_get_part(subj, 0, '/', &bv) < 0) {
1272 subjdn = aci_bvstrdup(&bv);
1273 if ( subjdn == NULL ) {
1277 if ( aci_get_part(subj, 1, '/', &bv) < 0 ) {
1278 setat = ch_strdup( SLAPD_ACI_SET_ATTR );
1280 setat = aci_bvstrdup(&bv);
1282 if ( setat != NULL ) {
1283 if ( dn_normalize(subjdn) != NULL
1284 && slap_str2ad(setat, &desc, &text) == LDAP_SUCCESS )
1286 backend_attribute(be, NULL, NULL, e,
1287 subjdn, desc, &bvals);
1288 if ( bvals != NULL ) {
1289 if ( bvals[0] != NULL )
1290 set = ch_strdup(bvals[0]->bv_val);
1291 ber_bvecfree(bvals);
1304 rc = (set_filter(aci_set_gather, &cookie, set, op->o_ndn, e->e_ndn, NULL) > 0);
1310 #ifdef SLAPD_ACI_ENABLED
1312 aci_list_map_rights(
1313 struct berval *list )
1320 for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
1323 switch (*bv.bv_val) {
1325 ACL_PRIV_SET(mask, ACL_PRIV_COMPARE);
1328 /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt defines
1329 * the right 's' to mean "set", but in the examples states
1330 * that the right 's' means "search". The latter definition
1333 ACL_PRIV_SET(mask, ACL_PRIV_SEARCH);
1336 ACL_PRIV_SET(mask, ACL_PRIV_READ);
1339 ACL_PRIV_SET(mask, ACL_PRIV_WRITE);
1342 /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt does not
1343 * define any equivalent to the AUTH right, so I've just used
1346 ACL_PRIV_SET(mask, ACL_PRIV_AUTH);
1358 struct berval *list,
1360 struct berval *val )
1362 struct berval bv, left, right;
1365 for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
1366 if (aci_get_part(&bv, 0, '=', &left) < 0
1367 || aci_get_part(&bv, 1, '=', &right) < 0)
1369 if (aci_strbvcmp(attr, &bv) == 0)
1371 } else if (val == NULL) {
1372 if (aci_strbvcmp(attr, &left) == 0)
1375 if (aci_strbvcmp(attr, &left) == 0) {
1376 /* this is experimental code that implements a
1377 * simple (prefix) match of the attribute value.
1378 * the ACI draft does not provide for aci's that
1379 * apply to specific values, but it would be
1380 * nice to have. If the <attr> part of an aci's
1381 * rights list is of the form <attr>=<value>,
1382 * that means the aci applies only to attrs with
1383 * the given value. Furthermore, if the attr is
1384 * of the form <attr>=<value>*, then <value> is
1385 * treated as a prefix, and the aci applies to
1386 * any value with that prefix.
1388 * Ideally, this would allow r.e. matches.
1390 if (aci_get_part(&right, 0, '*', &left) < 0
1391 || right.bv_len <= left.bv_len)
1393 if (aci_strbvcmp(val->bv_val, &right) == 0)
1395 } else if (val->bv_len >= left.bv_len) {
1396 if (strncasecmp( val->bv_val, left.bv_val, left.bv_len ) == 0)
1405 static slap_access_t
1406 aci_list_get_attr_rights(
1407 struct berval *list,
1409 struct berval *val )
1415 /* loop through each rights/attr pair, skip first part (action) */
1417 for (i = 1; aci_get_part(list, i + 1, ';', &bv) >= 0; i += 2) {
1418 if (aci_list_has_attr(&bv, attr, val) == 0)
1420 if (aci_get_part(list, i, ';', &bv) < 0)
1422 mask |= aci_list_map_rights(&bv);
1428 aci_list_get_rights(
1429 struct berval *list,
1432 slap_access_t *grant,
1433 slap_access_t *deny )
1435 struct berval perm, actn;
1436 slap_access_t *mask;
1439 if (attr == NULL || *attr == 0 || strcasecmp(attr, "entry") == 0) {
1446 /* loop through each permissions clause */
1447 for (i = 0; aci_get_part(list, i, '$', &perm) >= 0; i++) {
1448 if (aci_get_part(&perm, 0, ';', &actn) < 0)
1450 if (aci_strbvcmp( "grant", &actn ) == 0) {
1452 } else if (aci_strbvcmp( "deny", &actn ) == 0) {
1459 *mask |= aci_list_get_attr_rights(&perm, attr, val);
1460 *mask |= aci_list_get_attr_rights(&perm, "[all]", NULL);
1467 struct berval *subj,
1468 const char *defgrpoc,
1469 const char *defgrpat,
1478 char *subjdn, *grpdn = NULL;
1481 ObjectClass *grp_oc = NULL;
1482 AttributeDescription *grp_ad = NULL;
1486 /* format of string is "group/objectClassValue/groupAttrName" */
1487 if (aci_get_part(subj, 0, '/', &bv) < 0) {
1491 subjdn = aci_bvstrdup(&bv);
1492 if (subjdn == NULL) {
1496 if (aci_get_part(subj, 1, '/', &bv) < 0) {
1497 grpoc = ch_strdup( defgrpoc );
1499 grpoc = aci_bvstrdup(&bv);
1502 if (aci_get_part(subj, 2, '/', &bv) < 0) {
1503 grpat = ch_strdup( defgrpat );
1505 grpat = aci_bvstrdup(&bv);
1508 rc = slap_str2ad( grpat, &grp_ad, &text );
1509 if( rc != LDAP_SUCCESS ) {
1515 grp_oc = oc_find( grpoc );
1516 grpdn = (char *)ch_malloc(1024);
1518 if (grp_oc != NULL && grp_ad != NULL && grpdn != NULL) {
1519 string_expand(grpdn, 1024, subjdn, e->e_ndn, matches);
1520 if ( dn_normalize(grpdn) != NULL ) {
1521 rc = (backend_group(be, conn, op, e, grpdn, op->o_ndn, grp_oc, grp_ad) == 0);
1539 AttributeDescription *desc,
1542 regmatch_t *matches,
1543 slap_access_t *grant,
1547 struct berval bv, perms, sdn;
1550 char *attr = desc->ad_cname.bv_val;
1552 assert( attr != NULL );
1554 /* parse an aci of the form:
1555 oid#scope#action;rights;attr;rights;attr$action;rights;attr;rights;attr#dnType#subjectDN
1557 See draft-ietf-ldapext-aci-model-04.txt section 9.1 for
1558 a full description of the format for this attribute.
1560 For now, this routine only supports scope=entry.
1563 /* check that the aci has all 5 components */
1564 if (aci_get_part(aci, 4, '#', NULL) < 0)
1567 /* check that the aci family is supported */
1568 if (aci_get_part(aci, 0, '#', &bv) < 0)
1571 /* check that the scope is "entry" */
1572 if (aci_get_part(aci, 1, '#', &bv) < 0
1573 || aci_strbvcmp( "entry", &bv ) != 0)
1578 /* get the list of permissions clauses, bail if empty */
1579 if (aci_get_part(aci, 2, '#', &perms) <= 0)
1582 /* check if any permissions allow desired access */
1583 if (aci_list_get_rights(&perms, attr, val, grant, deny) == 0)
1586 /* see if we have a DN match */
1587 if (aci_get_part(aci, 3, '#', &bv) < 0)
1590 if (aci_get_part(aci, 4, '#', &sdn) < 0)
1593 if (aci_strbvcmp( "access-id", &bv ) == 0) {
1594 subjdn = aci_bvstrdup(&sdn);
1598 if ( dn_normalize(subjdn) != NULL )
1599 if (strcasecmp(op->o_ndn, subjdn) != 0)
1605 if (aci_strbvcmp( "self", &bv ) == 0) {
1606 if (strcasecmp(op->o_ndn, e->e_ndn) == 0)
1609 } else if (aci_strbvcmp( "dnattr", &bv ) == 0) {
1610 char *dnattr = aci_bvstrdup(&sdn);
1612 AttributeDescription *ad = NULL;
1615 rc = slap_str2ad( dnattr, &ad, &text );
1618 if( rc != LDAP_SUCCESS ) {
1624 bv.bv_val = op->o_ndn;
1625 bv.bv_len = strlen( bv.bv_val );
1627 for(at = attrs_find( e->e_attrs, ad );
1629 at = attrs_find( at->a_next, ad ) )
1631 if (value_find( ad, at->a_vals, &bv) == 0 ) {
1640 } else if (aci_strbvcmp( "group", &bv ) == 0) {
1641 if (aci_group_member(&sdn, SLAPD_GROUP_CLASS, SLAPD_GROUP_ATTR, be, e, conn, op, matches))
1644 } else if (aci_strbvcmp( "role", &bv ) == 0) {
1645 if (aci_group_member(&sdn, SLAPD_ROLE_CLASS, SLAPD_ROLE_ATTR, be, e, conn, op, matches))
1648 } else if (aci_strbvcmp( "set", &bv ) == 0) {
1649 if (aci_match_set(&sdn, be, e, conn, op, 0))
1652 } else if (aci_strbvcmp( "set-ref", &bv ) == 0) {
1653 if (aci_match_set(&sdn, be, e, conn, op, 1))
1661 #endif /* SLAPD_ACI_ENABLED */
1669 regmatch_t *matches)
1678 bufsiz--; /* leave space for lone $ */
1681 for ( dp = newbuf, sp = pat; size < bufsiz && *sp ; sp++) {
1682 /* did we previously see a $ */
1687 } else if (*sp >= '0' && *sp <= '9' ) {
1694 i = matches[n].rm_so;
1695 l = matches[n].rm_eo;
1696 for ( ; size < 512 && i < l; size++, i++ ) {
1714 /* must have ended with a single $ */
1722 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1723 "string_expand: pattern = %s\n", pat ));
1724 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1725 "string_expand: expanded = %s\n", newbuf ));
1727 Debug( LDAP_DEBUG_TRACE, "=> string_expand: pattern: %s\n", pat, 0, 0 );
1728 Debug( LDAP_DEBUG_TRACE, "=> string_expand: expanded: %s\n", newbuf, 0, 0 );
1734 char *pat, /* pattern to expand and match against */
1735 char *str, /* string to match against pattern */
1736 char *buf, /* buffer with $N expansion variables */
1737 regmatch_t *matches /* offsets in buffer for $N expansion variables */
1744 if(str == NULL) str = "";
1746 string_expand(newbuf, sizeof(newbuf), pat, buf, matches);
1747 if (( rc = regcomp(&re, newbuf, REG_EXTENDED|REG_ICASE))) {
1749 regerror(rc, &re, error, sizeof(error));
1752 LDAP_LOG(( "aci", LDAP_LEVEL_ERR,
1753 "regex_matches: compile( \"%s\", \"%s\") failed %s\n",
1756 Debug( LDAP_DEBUG_TRACE,
1757 "compile( \"%s\", \"%s\") failed %s\n",
1763 rc = regexec(&re, str, 0, NULL, 0);
1767 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL2,
1768 "regex_matches: string: %s\n", str ));
1769 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL2,
1770 "regex_matches: rc: %d %s\n",
1771 rc, rc ? "matches" : "no matches" ));
1773 Debug( LDAP_DEBUG_TRACE,
1774 "=> regex_matches: string: %s\n", str, 0, 0 );
1775 Debug( LDAP_DEBUG_TRACE,
1776 "=> regex_matches: rc: %d %s\n",
1777 rc, !rc ? "matches" : "no matches", 0 );