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 const char *attr = desc ? desc->ad_cname->bv_val : NULL;
93 regmatch_t matches[MAXREMATCHES];
96 LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
97 "access_allowed: conn %d %s access to \"%s\" \"%s\" requested\n",
98 conn->c_connid, access2str( access ), e->e_dn, attr ));
100 Debug( LDAP_DEBUG_ACL,
101 "=> access_allowed: %s access to \"%s\" \"%s\" requested\n",
102 access2str( access ),
107 assert( attr != NULL );
108 assert( access > ACL_NONE );
115 if ( be == NULL ) be = &backends[0];
116 assert( be != NULL );
118 /* grant database root access */
119 if ( be != NULL && be_isroot( be, op->o_ndn ) ) {
121 LDAP_LOG(( "acl", LDAP_LEVEL_INFO,
122 "access_allowed: conn %d root access granted\n",
125 Debug( LDAP_DEBUG_ACL,
126 "<= root access granted\n",
133 * no-user-modification operational attributes are ignored
134 * by ACL_WRITE checking as any found here are not provided
137 if ( access >= ACL_WRITE && is_at_no_user_mod( desc->ad_type )
138 && desc != slap_schema.si_ad_entry
139 && desc != slap_schema.si_ad_children )
142 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
143 "access_allowed: conn %d NoUserMod Operational attribute: %s access granted\n",
144 conn->c_connid, attr ));
146 Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:"
147 " %s access granted\n",
153 /* use backend default access if no backend acls */
154 if( be != NULL && be->be_acl == NULL ) {
156 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
157 "access_allowed: conn %d backend default %s access %s to \"%s\"\n",
158 conn->c_connid, access2str( access ),
159 be->be_dfltaccess >= access ? "granted" : "denied", op->o_dn ));
161 Debug( LDAP_DEBUG_ACL,
162 "=> access_allowed: backend default %s access %s to \"%s\"\n",
163 access2str( access ),
164 be->be_dfltaccess >= access ? "granted" : "denied", op->o_dn );
166 return be->be_dfltaccess >= access;
169 /* be is always non-NULL */
170 /* use global default access if no global acls */
171 } else if ( be == NULL && global_acl == NULL ) {
173 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
174 "access_allowed: conn %d global default %s access %s to \"%s\"\n",
175 conn->c_connid, access2str( access ),
176 global_default_access >= access ? "granted" : "denied", op->o_dn ));
178 Debug( LDAP_DEBUG_ACL,
179 "=> access_allowed: global default %s access %s to \"%s\"\n",
180 access2str( access ),
181 global_default_access >= access ? "granted" : "denied", op->o_dn );
183 return global_default_access >= access;
188 memset(matches, '\0', sizeof(matches));
194 while((a = acl_get( a, &count, be, op, e, desc, MAXREMATCHES, matches )) != NULL)
198 for (i = 0; i < MAXREMATCHES && matches[i].rm_so > 0; i++) {
200 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
201 "access_allowed: conn %d match[%d]: %d %d ",
202 conn->c_connid, i, (int)matches[i].rm_so, (int)matches[i].rm_eo ));
204 Debug( LDAP_DEBUG_ACL, "=> match[%d]: %d %d ", i,
205 (int)matches[i].rm_so, (int)matches[i].rm_eo );
207 if( matches[i].rm_so <= matches[0].rm_eo ) {
209 for ( n = matches[i].rm_so; n < matches[i].rm_eo; n++) {
210 Debug( LDAP_DEBUG_ACL, "%c", e->e_ndn[n], 0, 0 );
214 LDAP_LOG(( "acl", LDAP_LEVEL_ARGS, "\n" ));
216 Debug( LDAP_DEBUG_ARGS, "\n", 0, 0, 0 );
220 control = acl_mask( a, &mask, be, conn, op,
221 e, desc, val, matches );
223 if ( control != ACL_BREAK ) {
227 memset(matches, '\0', sizeof(matches));
230 if ( ACL_IS_INVALID( mask ) ) {
232 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
233 "access_allowed: conn %d \"%s\" (%s) invalid!\n",
234 conn->c_connid, e->e_dn, attr ));
236 Debug( LDAP_DEBUG_ACL,
237 "=> access_allowed: \"%s\" (%s) invalid!\n",
242 } else if ( control == ACL_BREAK ) {
244 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
245 "access_allowed: conn %d no more rules\n", conn->c_connid ));
247 Debug( LDAP_DEBUG_ACL,
248 "=> access_allowed: no more rules\n", 0, 0, 0);
254 LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
255 "access_allowed: conn %d %s access %s by %s\n",
257 access2str( access ),
258 ACL_GRANT( mask, access ) ? "granted" : "denied",
259 accessmask2str( mask, accessmaskbuf ) ));
261 Debug( LDAP_DEBUG_ACL,
262 "=> access_allowed: %s access %s by %s\n",
263 access2str( access ),
264 ACL_GRANT(mask, access) ? "granted" : "denied",
265 accessmask2str( mask, accessmaskbuf ) );
267 return ACL_GRANT(mask, access);
271 * acl_get - return the acl applicable to entry e, attribute
272 * attr. the acl returned is suitable for use in subsequent calls to
273 * acl_access_allowed().
276 static AccessControl *
283 AttributeDescription *desc,
285 regmatch_t *matches )
291 assert( count != NULL );
293 attr = desc ? desc->ad_cname->bv_val : NULL;
308 dnlen = strlen(e->e_ndn);
310 for ( ; a != NULL; a = a->acl_next ) {
313 if (a->acl_dn_pat != NULL) {
314 if ( a->acl_dn_style == ACL_STYLE_REGEX ) {
316 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
317 "acl_get: dnpat [%d] %s nsub: %d\n",
318 *count, a->acl_dn_pat, (int) a->acl_dn_re.re_nsub ));
320 Debug( LDAP_DEBUG_ACL, "=> dnpat: [%d] %s nsub: %d\n",
321 *count, a->acl_dn_pat, (int) a->acl_dn_re.re_nsub );
323 if (regexec(&a->acl_dn_re, e->e_ndn, nmatch, matches, 0))
328 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
329 "acl_get: dn [%d] %s\n",
330 *count, a->acl_dn_pat ));
332 Debug( LDAP_DEBUG_ACL, "=> dn: [%d] %s\n",
333 *count, a->acl_dn_pat, 0 );
335 patlen = strlen( a->acl_dn_pat );
336 if ( dnlen < patlen )
339 if ( a->acl_dn_style == ACL_STYLE_BASE ) {
340 /* base dn -- entire object DN must match */
341 if ( dnlen != patlen )
344 } else if ( a->acl_dn_style == ACL_STYLE_ONE ) {
348 if ( dnlen <= patlen )
351 if ( e->e_ndn[dnlen - patlen - 1] != ',' )
354 rdn = dn_rdn( NULL, e->e_ndn );
356 rdnlen = strlen( rdn );
359 if ( rdnlen != dnlen - patlen - 1 )
362 } else if ( a->acl_dn_style == ACL_STYLE_SUBTREE ) {
363 if ( dnlen > patlen && e->e_ndn[dnlen - patlen - 1] != ',' )
366 } else if ( a->acl_dn_style == ACL_STYLE_CHILDREN ) {
367 if ( dnlen <= patlen )
369 if ( e->e_ndn[dnlen - patlen - 1] != ',' )
373 if ( strcmp( a->acl_dn_pat, e->e_ndn + dnlen - patlen ) != 0 )
378 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
379 "acl_get: [%d] matched\n",
382 Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] matched\n",
387 if ( a->acl_filter != NULL ) {
388 ber_int_t rc = test_filter( NULL, NULL, NULL, e, a->acl_filter );
389 if ( rc != LDAP_COMPARE_TRUE ) {
395 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
396 "acl_get: [%d] check attr %s\n",
399 Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] check attr %s\n",
402 if ( attr == NULL || a->acl_attrs == NULL ||
403 ad_inlist( desc, a->acl_attrs ) )
406 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
407 "acl_get: [%d] acl %s attr: %s\n",
408 *count, e->e_dn, attr ));
410 Debug( LDAP_DEBUG_ACL,
411 "<= acl_get: [%d] acl %s attr: %s\n",
412 *count, e->e_dn, attr );
416 matches[0].rm_so = matches[0].rm_eo = -1;
420 LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
421 "acl_get: done.\n" ));
423 Debug( LDAP_DEBUG_ACL, "<= acl_get: done.\n", 0, 0, 0 );
430 * acl_mask - modifies mask based upon the given acl and the
431 * requested access to entry e, attribute attr, value val. if val
432 * is null, access to the whole attribute is assumed (all values).
434 * returns 0 access NOT allowed
438 static slap_control_t
446 AttributeDescription *desc,
451 int i, odnlen, patlen;
454 char accessmaskbuf[ACCESSMASK_MAXLEN];
456 const char *attr = desc ? desc->ad_cname->bv_val : NULL;
459 assert( mask != NULL );
462 LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
463 "acl_mask: conn %d access to entry \"%s\", attr \"%s\" requested\n",
464 conn->c_connid, e->e_dn, attr ));
466 LDAP_LOG(( "acl", LDAP_LEVEL_ARGS,
467 " to %s by \"%s\", (%s) \n",
468 val ? "value" : "all values",
469 op->o_ndn ? op->o_ndn : "",
470 accessmask2str( *mask, accessmaskbuf ) ));
472 Debug( LDAP_DEBUG_ACL,
473 "=> acl_mask: access to entry \"%s\", attr \"%s\" requested\n",
476 Debug( LDAP_DEBUG_ACL,
477 "=> acl_mask: to %s by \"%s\", (%s) \n",
478 val ? "value" : "all values",
479 op->o_ndn ? op->o_ndn : "",
480 accessmask2str( *mask, accessmaskbuf ) );
483 for ( i = 1, b = a->acl_access; b != NULL; b = b->a_next, i++ ) {
484 slap_mask_t oldmask, modmask;
486 ACL_INVALIDATE( modmask );
488 /* AND <who> clauses */
489 if ( b->a_dn_pat != NULL ) {
491 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
492 "acl_mask: conn %d check a_dn_pat: %s\n",
493 conn->c_connid, b->a_dn_pat ));
495 Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n",
499 * if access applies to the entry itself, and the
500 * user is bound as somebody in the same namespace as
501 * the entry, OR the given dn matches the dn pattern
503 if ( strcmp( b->a_dn_pat, "anonymous" ) == 0 ) {
504 if (op->o_ndn != NULL && op->o_ndn[0] != '\0' ) {
508 } else if ( strcmp( b->a_dn_pat, "users" ) == 0 ) {
509 if (op->o_ndn == NULL || op->o_ndn[0] == '\0' ) {
513 } else if ( strcmp( b->a_dn_pat, "self" ) == 0 ) {
514 if( op->o_ndn == NULL || op->o_ndn[0] == '\0' ) {
518 if ( e->e_dn == NULL || strcmp( e->e_ndn, op->o_ndn ) != 0 ) {
522 } else if ( b->a_dn_style == ACL_STYLE_REGEX ) {
523 if ( strcmp( b->a_dn_pat, "*" ) != 0 ) {
524 int ret = regex_matches( b->a_dn_pat,
525 op->o_ndn, e->e_ndn, matches );
533 if ( e->e_dn == NULL )
536 patlen = strlen( b->a_dn_pat );
537 odnlen = strlen( op->o_ndn );
538 if ( odnlen < patlen )
541 if ( b->a_dn_style == ACL_STYLE_BASE ) {
542 /* base dn -- entire object DN must match */
543 if ( odnlen != patlen )
546 } else if ( b->a_dn_style == ACL_STYLE_ONE ) {
550 if ( odnlen <= patlen )
553 if ( op->o_ndn[odnlen - patlen - 1] != ',' )
556 rdn = dn_rdn( NULL, op->o_ndn );
558 rdnlen = strlen( rdn );
561 if ( rdnlen != odnlen - patlen - 1 )
564 } else if ( b->a_dn_style == ACL_STYLE_SUBTREE ) {
565 if ( odnlen > patlen && op->o_ndn[odnlen - patlen - 1] != ',' )
568 } else if ( b->a_dn_style == ACL_STYLE_CHILDREN ) {
569 if ( odnlen <= patlen )
571 if ( op->o_ndn[odnlen - patlen - 1] != ',' )
575 if ( strcmp( b->a_dn_pat, op->o_ndn + odnlen - patlen ) != 0 )
581 if ( b->a_sockurl_pat != NULL ) {
583 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
584 "acl_mask: conn %d check a_sockurl_pat: %s\n",
585 conn->c_connid, b->a_sockurl_pat ));
587 Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n",
588 b->a_sockurl_pat, 0, 0 );
591 if ( strcmp( b->a_sockurl_pat, "*" ) != 0) {
592 if ( b->a_sockurl_style == ACL_STYLE_REGEX) {
593 if (!regex_matches( b->a_sockurl_pat, conn->c_listener_url,
594 e->e_ndn, matches ) )
599 if ( strcasecmp( b->a_sockurl_pat, conn->c_listener_url ) == 0 )
605 if ( b->a_domain_pat != NULL ) {
607 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
608 "acl_mask: conn %d check a_domain_pat: %s\n",
609 conn->c_connid, b->a_domain_pat ));
611 Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n",
612 b->a_domain_pat, 0, 0 );
614 if ( strcmp( b->a_domain_pat, "*" ) != 0) {
615 if ( b->a_domain_style == ACL_STYLE_REGEX) {
616 if (!regex_matches( b->a_domain_pat, conn->c_peer_domain,
617 e->e_ndn, matches ) )
622 if ( strcasecmp( b->a_domain_pat, conn->c_peer_domain ) == 0 )
628 if ( b->a_peername_pat != NULL ) {
630 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
631 "acl_mask: conn %d check a_perrname_path: %s\n",
632 conn->c_connid, b->a_peername_pat ));
634 Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n",
635 b->a_peername_pat, 0, 0 );
637 if ( strcmp( b->a_peername_pat, "*" ) != 0) {
638 if ( b->a_peername_style == ACL_STYLE_REGEX) {
639 if (!regex_matches( b->a_peername_pat, conn->c_peer_name,
640 e->e_ndn, matches ) )
645 if ( strcasecmp( b->a_peername_pat, conn->c_peer_name ) == 0 )
651 if ( b->a_sockname_pat != NULL ) {
653 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
654 "acl_mask: conn %d check a_sockname_path: %s\n",
655 conn->c_connid, b->a_sockname_pat ));
657 Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n",
658 b->a_sockname_pat, 0, 0 );
660 if ( strcmp( b->a_sockname_pat, "*" ) != 0) {
661 if ( b->a_sockname_style == ACL_STYLE_REGEX) {
662 if (!regex_matches( b->a_sockname_pat, conn->c_sock_name,
663 e->e_ndn, matches ) )
668 if ( strcasecmp( b->a_sockname_pat, conn->c_sock_name ) == 0 )
674 if ( b->a_dn_at != NULL && op->o_ndn != NULL ) {
679 const char *desc = b->a_dn_at->ad_cname->bv_val;
682 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
683 "acl_mask: conn %d check a_dn_pat: %s\n",
684 conn->c_connid, desc ));
686 Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n",
689 bv.bv_val = op->o_ndn;
690 bv.bv_len = strlen( bv.bv_val );
692 /* see if asker is listed in dnattr */
693 for( at = attrs_find( e->e_attrs, b->a_dn_at );
695 at = attrs_find( at->a_next, b->a_dn_at ) )
697 if( value_find( b->a_dn_at, at->a_vals, &bv ) == 0 ) {
705 /* have a dnattr match. if this is a self clause then
706 * the target must also match the op dn.
708 if ( b->a_dn_self ) {
709 /* check if the target is an attribute. */
712 /* target is attribute, check if the attribute value
715 rc = value_match( &match, b->a_dn_at,
716 b->a_dn_at->ad_type->sat_equality, 0,
718 /* on match error or no match, fail the ACL clause */
719 if (rc != LDAP_SUCCESS || match != 0 )
723 /* no dnattr match, check if this is a self clause */
724 if ( ! b->a_dn_self )
726 /* this is a self clause, check if the target is an
731 /* target is attribute, check if the attribute value
734 rc = value_match( &match, b->a_dn_at,
735 b->a_dn_at->ad_type->sat_equality, 0,
738 /* on match error or no match, fail the ACL clause */
739 if (rc != LDAP_SUCCESS || match != 0 )
744 if ( b->a_group_pat != NULL && op->o_ndn != NULL ) {
747 /* b->a_group is an unexpanded entry name, expanded it should be an
748 * entry with objectclass group* and we test to see if odn is one of
749 * the values in the attribute group
751 /* see if asker is listed in dnattr */
752 if ( b->a_group_style == ACL_STYLE_REGEX ) {
753 string_expand(buf, sizeof(buf), b->a_group_pat, e->e_ndn, matches);
754 if ( dn_normalize(buf) == NULL ) {
755 /* did not expand to a valid dn */
759 strncpy( buf, b->a_group_pat, sizeof(buf) - 1 );
760 buf[sizeof(buf) - 1] = 0;
763 if (backend_group(be, conn, op, e, buf, op->o_ndn,
764 b->a_group_oc, b->a_group_at) != 0)
770 if ( b->a_set_pat != NULL ) {
773 bv.bv_val = b->a_set_pat;
774 bv.bv_len = strlen(b->a_set_pat);
775 if (aci_match_set( &bv, 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 == NULL || op->o_ndn[0] == '\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 ) ) {
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);
1140 res = strncasecmp( s, bv->bv_val, bv->bv_len );
1144 if (len > (int)bv->bv_len)
1146 if (len < (int)bv->bv_len)
1153 struct berval *list,
1167 while (len >= 0 && --ix >= 0) {
1168 while (--len >= 0 && *p++ != sep) ;
1170 while (len >= 0 && *p == ' ') {
1181 while (--len >= 0 && *p != sep) {
1185 while (bv->bv_len > 0 && *--p == ' ')
1191 aci_set_gather (void *cookie, char *name, char *attr)
1198 } *cp = (void *)cookie;
1199 struct berval **bvals = NULL;
1204 /* this routine needs to return the bervals instead of
1205 * plain strings, since syntax is not known. It should
1206 * also return the syntax or some "comparison cookie".
1209 if ((ndn = ch_strdup(name)) != NULL) {
1210 if (dn_normalize(ndn) != NULL) {
1212 AttributeDescription *desc = NULL;
1213 if (slap_str2ad(attr, &desc, &text) == LDAP_SUCCESS) {
1214 backend_attribute(cp->be, NULL /*cp->conn*/,
1215 NULL /*cp->op*/, cp->e,
1217 if (bvals != NULL) {
1218 for (i = 0; bvals[i] != NULL; i++) { }
1219 vals = ch_calloc(i + 1, sizeof(char *));
1222 vals[i] = bvals[i]->bv_val;
1223 bvals[i]->bv_val = NULL;
1226 ber_bvecfree(bvals);
1238 struct berval *subj,
1256 set = aci_bvstrdup(subj);
1261 struct berval **bvals;
1263 AttributeDescription *desc = NULL;
1265 /* format of string is "entry/setAttrName" */
1266 if (aci_get_part(subj, 0, '/', &bv) < 0) {
1270 subjdn = aci_bvstrdup(&bv);
1271 if ( subjdn == NULL ) {
1275 if ( aci_get_part(subj, 1, '/', &bv) < 0 ) {
1276 setat = ch_strdup( SLAPD_ACI_SET_ATTR );
1278 setat = aci_bvstrdup(&bv);
1280 if ( setat != NULL ) {
1281 if ( dn_normalize(subjdn) != NULL
1282 && slap_str2ad(setat, &desc, &text) == LDAP_SUCCESS )
1284 backend_attribute(be, NULL, NULL, e,
1285 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, 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, '$', &perm) >= 0; i++) {
1447 if (aci_get_part(&perm, 0, ';', &actn) < 0)
1449 if (aci_strbvcmp( "grant", &actn ) == 0) {
1451 } else if (aci_strbvcmp( "deny", &actn ) == 0) {
1458 *mask |= aci_list_get_attr_rights(&perm, attr, val);
1459 *mask |= aci_list_get_attr_rights(&perm, "[all]", NULL);
1466 struct berval *subj,
1467 const char *defgrpoc,
1468 const char *defgrpat,
1477 char *subjdn, *grpdn = NULL;
1480 ObjectClass *grp_oc = NULL;
1481 AttributeDescription *grp_ad = NULL;
1485 /* format of string is "group/objectClassValue/groupAttrName" */
1486 if (aci_get_part(subj, 0, '/', &bv) < 0) {
1490 subjdn = aci_bvstrdup(&bv);
1491 if (subjdn == NULL) {
1495 if (aci_get_part(subj, 1, '/', &bv) < 0) {
1496 grpoc = ch_strdup( defgrpoc );
1498 grpoc = aci_bvstrdup(&bv);
1501 if (aci_get_part(subj, 2, '/', &bv) < 0) {
1502 grpat = ch_strdup( defgrpat );
1504 grpat = aci_bvstrdup(&bv);
1507 rc = slap_str2ad( grpat, &grp_ad, &text );
1508 if( rc != LDAP_SUCCESS ) {
1514 grp_oc = oc_find( grpoc );
1515 grpdn = (char *)ch_malloc(1024);
1517 if (grp_oc != NULL && grp_ad != NULL && grpdn != NULL) {
1518 string_expand(grpdn, 1024, subjdn, e->e_ndn, matches);
1519 if ( dn_normalize(grpdn) != NULL ) {
1520 rc = (backend_group(be, conn, op, e, grpdn, op->o_ndn, grp_oc, grp_ad) == 0);
1525 if( grp_ad != NULL ) ad_free( grp_ad, 1 );
1539 AttributeDescription *desc,
1542 regmatch_t *matches,
1543 slap_access_t *grant,
1547 struct berval bv, perms, sdn;
1550 char *attr = desc->ad_cname->bv_val;
1552 /* parse an aci of the form:
1553 oid#scope#action;rights;attr;rights;attr$action;rights;attr;rights;attr#dnType#subjectDN
1555 See draft-ietf-ldapext-aci-model-04.txt section 9.1 for
1556 a full description of the format for this attribute.
1558 For now, this routine only supports scope=entry.
1561 /* check that the aci has all 5 components */
1562 if (aci_get_part(aci, 4, '#', NULL) < 0)
1565 /* check that the aci family is supported */
1566 if (aci_get_part(aci, 0, '#', &bv) < 0)
1569 /* check that the scope is "entry" */
1570 if (aci_get_part(aci, 1, '#', &bv) < 0
1571 || aci_strbvcmp( "entry", &bv ) != 0)
1576 /* get the list of permissions clauses, bail if empty */
1577 if (aci_get_part(aci, 2, '#', &perms) <= 0)
1580 /* check if any permissions allow desired access */
1581 if (aci_list_get_rights(&perms, attr, val, grant, deny) == 0)
1584 /* see if we have a DN match */
1585 if (aci_get_part(aci, 3, '#', &bv) < 0)
1588 if (aci_get_part(aci, 4, '#', &sdn) < 0)
1591 if (aci_strbvcmp( "access-id", &bv ) == 0) {
1592 subjdn = aci_bvstrdup(&sdn);
1596 if ( dn_normalize(subjdn) != NULL )
1597 if (strcasecmp(op->o_ndn, subjdn) != 0)
1603 if (aci_strbvcmp( "self", &bv ) == 0) {
1604 if (strcasecmp(op->o_ndn, e->e_ndn) == 0)
1607 } else if (aci_strbvcmp( "dnattr", &bv ) == 0) {
1608 char *dnattr = aci_bvstrdup(&sdn);
1610 AttributeDescription *ad = NULL;
1613 rc = slap_str2ad( dnattr, &ad, &text );
1616 if( rc != LDAP_SUCCESS ) {
1622 bv.bv_val = op->o_ndn;
1623 bv.bv_len = strlen( bv.bv_val );
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 ) {
1639 } else if (aci_strbvcmp( "group", &bv ) == 0) {
1640 if (aci_group_member(&sdn, SLAPD_GROUP_CLASS, SLAPD_GROUP_ATTR, be, e, conn, op, matches))
1643 } else if (aci_strbvcmp( "role", &bv ) == 0) {
1644 if (aci_group_member(&sdn, SLAPD_ROLE_CLASS, SLAPD_ROLE_ATTR, be, e, conn, op, matches))
1647 } else if (aci_strbvcmp( "set", &bv ) == 0) {
1648 if (aci_match_set(&sdn, be, e, conn, op, 0))
1651 } else if (aci_strbvcmp( "set-ref", &bv ) == 0) {
1652 if (aci_match_set(&sdn, be, e, conn, op, 1))
1660 #endif /* SLAPD_ACI_ENABLED */
1668 regmatch_t *matches)
1677 bufsiz--; /* leave space for lone $ */
1680 for ( dp = newbuf, sp = pat; size < bufsiz && *sp ; sp++) {
1681 /* did we previously see a $ */
1686 } else if (*sp >= '0' && *sp <= '9' ) {
1693 i = matches[n].rm_so;
1694 l = matches[n].rm_eo;
1695 for ( ; size < 512 && i < l; size++, i++ ) {
1713 /* must have ended with a single $ */
1721 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1722 "string_expand: pattern = %s\n", pat ));
1723 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1724 "string_expand: expanded = %s\n", newbuf ));
1726 Debug( LDAP_DEBUG_TRACE, "=> string_expand: pattern: %s\n", pat, 0, 0 );
1727 Debug( LDAP_DEBUG_TRACE, "=> string_expand: expanded: %s\n", newbuf, 0, 0 );
1733 char *pat, /* pattern to expand and match against */
1734 char *str, /* string to match against pattern */
1735 char *buf, /* buffer with $N expansion variables */
1736 regmatch_t *matches /* offsets in buffer for $N expansion variables */
1743 if(str == NULL) str = "";
1745 string_expand(newbuf, sizeof(newbuf), pat, buf, matches);
1746 if (( rc = regcomp(&re, newbuf, REG_EXTENDED|REG_ICASE))) {
1748 regerror(rc, &re, error, sizeof(error));
1751 LDAP_LOG(( "aci", LDAP_LEVEL_ERR,
1752 "regex_matches: compile( \"%s\", \"%s\") failed %s\n",
1755 Debug( LDAP_DEBUG_TRACE,
1756 "compile( \"%s\", \"%s\") failed %s\n",
1762 rc = regexec(&re, str, 0, NULL, 0);
1766 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL2,
1767 "regex_matches: string: %s\n", str ));
1768 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL2,
1769 "regex_matches: rc: %d %s\n",
1770 rc, rc ? "matches" : "no matches" ));
1772 Debug( LDAP_DEBUG_TRACE,
1773 "=> regex_matches: string: %s\n", str, 0, 0 );
1774 Debug( LDAP_DEBUG_TRACE,
1775 "=> regex_matches: rc: %d %s\n",
1776 rc, !rc ? "matches" : "no matches", 0 );