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Patrick Welche <prlw1@cam.ac.uk>
[netbsd-mini2440.git] / external / bsd / openldap / dist / servers / slapd / acl.c
blob7a64316358b34779bf9d0cd38e57b8b01fb70075
1 /* acl.c - routines to parse and check acl's */
2 /* $OpenLDAP: pkg/ldap/servers/slapd/acl.c,v 1.303.2.16 2008/05/20 00:08:13 quanah Exp $ */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 *
5 * Copyright 1998-2008 The OpenLDAP Foundation.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
10 * Public License.
11 *
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
15 */
16 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
17 * All rights reserved.
18 *
19 * Redistribution and use in source and binary forms are permitted
20 * provided that this notice is preserved and that due credit is given
21 * to the University of Michigan at Ann Arbor. The name of the University
22 * may not be used to endorse or promote products derived from this
23 * software without specific prior written permission. This software
24 * is provided ``as is'' without express or implied warranty.
25 */
26
27 #include "portable.h"
28
29 #include <stdio.h>
30
31 #include <ac/regex.h>
32 #include <ac/socket.h>
33 #include <ac/string.h>
34
35 #include "slap.h"
36 #include "sets.h"
37 #include "lber_pvt.h"
38 #include "lutil.h"
39
40 #define ACL_BUF_SIZE 1024 /* use most appropriate size */
41
42 static const struct berval acl_bv_ip_eq = BER_BVC( "IP=" );
43 #ifdef LDAP_PF_INET6
44 static const struct berval acl_bv_ipv6_eq = BER_BVC( "IP=[" );
45 #endif /* LDAP_PF_INET6 */
46 #ifdef LDAP_PF_LOCAL
47 static const struct berval acl_bv_path_eq = BER_BVC("PATH=");
48 #endif /* LDAP_PF_LOCAL */
49
50 static AccessControl * slap_acl_get(
51 AccessControl *ac, int *count,
52 Operation *op, Entry *e,
53 AttributeDescription *desc,
54 struct berval *val,
55 int nmatch, regmatch_t *matches,
56 AccessControlState *state );
57
58 static slap_control_t slap_acl_mask(
59 AccessControl *ac, slap_mask_t *mask,
60 Operation *op, Entry *e,
61 AttributeDescription *desc,
62 struct berval *val,
63 int nmatch,
64 regmatch_t *matches,
65 int count,
66 AccessControlState *state );
67
68 static int regex_matches(
69 struct berval *pat, char *str, char *buf,
70 int nmatch, regmatch_t *matches);
71
72 typedef struct AclSetCookie {
73 SetCookie asc_cookie;
74 #define asc_op asc_cookie.set_op
75 Entry *asc_e;
76 } AclSetCookie;
77
78 SLAP_SET_GATHER acl_set_gather;
79 SLAP_SET_GATHER acl_set_gather2;
80
81 /*
82 * access_allowed - check whether op->o_ndn is allowed the requested access
83 * to entry e, attribute attr, value val. if val is null, access to
84 * the whole attribute is assumed (all values).
85 *
86 * This routine loops through all access controls and calls
87 * slap_acl_mask() on each applicable access control.
88 * The loop exits when a definitive answer is reached or
89 * or no more controls remain.
90 *
91 * returns:
92 * 0 access denied
93 * 1 access granted
94 *
95 * Notes:
96 * - can be legally called with op == NULL
97 * - can be legally called with op->o_bd == NULL
98 */
99
100 int
101 slap_access_always_allowed(
102 Operation *op,
103 Entry *e,
104 AttributeDescription *desc,
105 struct berval *val,
106 slap_access_t access,
107 AccessControlState *state,
108 slap_mask_t *maskp )
109 {
110 assert( maskp != NULL );
111
112 /* assign all */
113 ACL_LVL_ASSIGN_MANAGE( *maskp );
114
115 return 1;
116 }
117
118 int
119 slap_access_allowed(
120 Operation *op,
121 Entry *e,
122 AttributeDescription *desc,
123 struct berval *val,
124 slap_access_t access,
125 AccessControlState *state,
126 slap_mask_t *maskp )
127 {
128 int ret = 1;
129 int count;
130 AccessControl *a = NULL;
131
132 #ifdef LDAP_DEBUG
133 char accessmaskbuf[ACCESSMASK_MAXLEN];
134 #endif
135 slap_mask_t mask;
136 slap_control_t control;
137 slap_access_t access_level;
138 const char *attr;
139 regmatch_t matches[MAXREMATCHES];
140
141 assert( op != NULL );
142 assert( e != NULL );
143 assert( desc != NULL );
144 assert( maskp != NULL );
145
146 access_level = ACL_LEVEL( access );
147 attr = desc->ad_cname.bv_val;
148
149 assert( attr != NULL );
150
151 ACL_INIT( mask );
152
153 /* grant database root access */
154 if ( be_isroot( op ) ) {
155 Debug( LDAP_DEBUG_ACL, "<= root access granted\n", 0, 0, 0 );
156 mask = ACL_LVL_MANAGE;
157 goto done;
158 }
159
160 /*
161 * no-user-modification operational attributes are ignored
162 * by ACL_WRITE checking as any found here are not provided
163 * by the user
164 *
165 * NOTE: but they are not ignored for ACL_MANAGE, because
166 * if we get here it means a non-root user is trying to
167 * manage data, so we need to check its privileges.
168 */
169 if ( access_level == ACL_WRITE
170 && is_at_no_user_mod( desc->ad_type )
171 && desc != slap_schema.si_ad_entry
172 && desc != slap_schema.si_ad_children )
173 {
174 Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:"
175 " %s access granted\n",
176 attr, 0, 0 );
177 goto done;
178 }
179
180 /* use backend default access if no backend acls */
181 if ( op->o_bd->be_acl == NULL ) {
182 int i;
183
184 Debug( LDAP_DEBUG_ACL,
185 "=> slap_access_allowed: backend default %s "
186 "access %s to \"%s\"\n",
187 access2str( access ),
188 op->o_bd->be_dfltaccess >= access_level ? "granted" : "denied",
189 op->o_dn.bv_val ? op->o_dn.bv_val : "(anonymous)" );
190 ret = op->o_bd->be_dfltaccess >= access_level;
191
192 mask = ACL_PRIV_LEVEL;
193 for ( i = ACL_NONE; i <= op->o_bd->be_dfltaccess; i++ ) {
194 ACL_PRIV_SET( mask, ACL_ACCESS2PRIV( i ) );
195 }
196
197 goto done;
198 }
199
200 ret = 0;
201 control = ACL_BREAK;
202
203 if ( state && state->as_vd_ad == desc ) {
204 a = state->as_vd_acl;
205 count = state->as_vd_acl_count;
206
207 } else {
208 if ( state ) state->as_vi_acl = NULL;
209 a = NULL;
210 count = 0;
211 }
212 ACL_PRIV_ASSIGN( mask, *maskp );
213 memset( matches, '\0', sizeof( matches ) );
214
215 while ( ( a = slap_acl_get( a, &count, op, e, desc, val,
216 MAXREMATCHES, matches, state ) ) != NULL )
217 {
218 int i;
219
220 for ( i = 0; i < MAXREMATCHES && matches[i].rm_so > 0; i++ ) {
221 Debug( LDAP_DEBUG_ACL, "=> match[%d]: %d %d ", i,
222 (int)matches[i].rm_so, (int)matches[i].rm_eo );
223 if ( matches[i].rm_so <= matches[0].rm_eo ) {
224 int n;
225 for ( n = matches[i].rm_so; n < matches[i].rm_eo; n++ ) {
226 Debug( LDAP_DEBUG_ACL, "%c", e->e_ndn[n], 0, 0 );
227 }
228 }
229 Debug( LDAP_DEBUG_ARGS, "\n", 0, 0, 0 );
230 }
231
232 if ( state ) {
233 if ( state->as_vi_acl == a &&
234 ( state->as_recorded & ACL_STATE_RECORDED_NV ) )
235 {
236 Debug( LDAP_DEBUG_ACL,
237 "=> slap_access_allowed: result was in cache (%s)\n",
238 attr, 0, 0 );
239 ret = state->as_result;
240 goto done;
241 } else {
242 Debug( LDAP_DEBUG_ACL,
243 "=> slap_access_allowed: result not in cache (%s)\n",
244 attr, 0, 0 );
245 }
246 }
247
248 control = slap_acl_mask( a, &mask, op,
249 e, desc, val, MAXREMATCHES, matches, count, state );
250
251 if ( control != ACL_BREAK ) {
252 break;
253 }
254
255 memset( matches, '\0', sizeof( matches ) );
256 }
257
258 if ( ACL_IS_INVALID( mask ) ) {
259 Debug( LDAP_DEBUG_ACL,
260 "=> slap_access_allowed: \"%s\" (%s) invalid!\n",
261 e->e_dn, attr, 0 );
262 ACL_PRIV_ASSIGN( mask, *maskp );
263
264 } else if ( control == ACL_BREAK ) {
265 Debug( LDAP_DEBUG_ACL,
266 "=> slap_access_allowed: no more rules\n", 0, 0, 0 );
267
268 goto done;
269 }
270
271 ret = ACL_GRANT( mask, access );
272
273 Debug( LDAP_DEBUG_ACL,
274 "=> slap_access_allowed: %s access %s by %s\n",
275 access2str( access ), ret ? "granted" : "denied",
276 accessmask2str( mask, accessmaskbuf, 1 ) );
277
278 done:
279 ACL_PRIV_ASSIGN( *maskp, mask );
280 return ret;
281 }
282
283 int
284 fe_access_allowed(
285 Operation *op,
286 Entry *e,
287 AttributeDescription *desc,
288 struct berval *val,
289 slap_access_t access,
290 AccessControlState *state,
291 slap_mask_t *maskp )
292 {
293 BackendDB *be_orig;
294 int rc;
295
296 /*
297 * NOTE: control gets here if FIXME
298 * if an appropriate backend cannot be selected for the operation,
299 * we assume that the frontend should handle this
300 * FIXME: should select_backend() take care of this,
301 * and return frontendDB instead of NULL? maybe for some value
302 * of the flags?
303 */
304 be_orig = op->o_bd;
305
306 if ( op->o_bd == NULL ) {
307 op->o_bd = select_backend( &op->o_req_ndn, 0 );
308 if ( op->o_bd == NULL )
309 op->o_bd = frontendDB;
310 }
311 rc = slap_access_allowed( op, e, desc, val, access, state, maskp );
312 op->o_bd = be_orig;
313
314 return rc;
315 }
316
317 int
318 access_allowed_mask(
319 Operation *op,
320 Entry *e,
321 AttributeDescription *desc,
322 struct berval *val,
323 slap_access_t access,
324 AccessControlState *state,
325 slap_mask_t *maskp )
326 {
327 int ret = 1;
328 AccessControl *a = NULL;
329 int be_null = 0;
330
331 #ifdef LDAP_DEBUG
332 char accessmaskbuf[ACCESSMASK_MAXLEN];
333 #endif
334 slap_mask_t mask;
335 slap_access_t access_level;
336 const char *attr;
337 static AccessControlState state_init = ACL_STATE_INIT;
338
339 assert( e != NULL );
340 assert( desc != NULL );
341
342 access_level = ACL_LEVEL( access );
343
344 assert( access_level > ACL_NONE );
345
346 ACL_INIT( mask );
347 if ( maskp ) ACL_INVALIDATE( *maskp );
348
349 attr = desc->ad_cname.bv_val;
350
351 assert( attr != NULL );
352
353 if ( op ) {
354 if ( op->o_acl_priv != ACL_NONE ) {
355 access = op->o_acl_priv;
356
357 } else if ( op->o_is_auth_check &&
358 ( access_level == ACL_SEARCH || access_level == ACL_READ ) )
359 {
360 access = ACL_AUTH;
361
362 } else if ( get_relax( op ) && access_level == ACL_WRITE &&
363 desc == slap_schema.si_ad_entry )
364 {
365 access = ACL_MANAGE;
366 }
367 }
368
369 if ( state ) {
370 if ( state->as_vd_ad == desc ) {
371 if ( ( state->as_recorded & ACL_STATE_RECORDED_NV ) &&
372 val == NULL )
373 {
374 return state->as_result;
375
376 }
377 } else {
378 *state = state_init;
379 }
380 }
381
382 Debug( LDAP_DEBUG_ACL,
383 "=> access_allowed: %s access to \"%s\" \"%s\" requested\n",
384 access2str( access ), e->e_dn, attr );
385
386 if ( op == NULL ) {
387 /* no-op call */
388 goto done;
389 }
390
391 if ( op->o_bd == NULL ) {
392 op->o_bd = LDAP_STAILQ_FIRST( &backendDB );
393 be_null = 1;
394
395 /* FIXME: experimental; use first backend rules
396 * iff there is no global_acl (ITS#3100)
397 */
398 if ( frontendDB->be_acl != NULL ) {
399 op->o_bd = frontendDB;
400 }
401 }
402 assert( op->o_bd != NULL );
403
404 /* this is enforced in backend_add() */
405 if ( op->o_bd->bd_info->bi_access_allowed ) {
406 /* delegate to backend */
407 ret = op->o_bd->bd_info->bi_access_allowed( op, e,
408 desc, val, access, state, &mask );
409
410 } else {
411 /* use default (but pass through frontend
412 * for global ACL overlays) */
413 ret = frontendDB->bd_info->bi_access_allowed( op, e,
414 desc, val, access, state, &mask );
415 }
416
417 if ( !ret ) {
418 if ( ACL_IS_INVALID( mask ) ) {
419 Debug( LDAP_DEBUG_ACL,
420 "=> access_allowed: \"%s\" (%s) invalid!\n",
421 e->e_dn, attr, 0 );
422 ACL_INIT( mask );
423
424 } else {
425 Debug( LDAP_DEBUG_ACL,
426 "=> access_allowed: no more rules\n", 0, 0, 0 );
427
428 goto done;
429 }
430 }
431
432 Debug( LDAP_DEBUG_ACL,
433 "=> access_allowed: %s access %s by %s\n",
434 access2str( access ), ret ? "granted" : "denied",
435 accessmask2str( mask, accessmaskbuf, 1 ) );
436
437 done:
438 if ( state != NULL ) {
439 /* If not value-dependent, save ACL in case of more attrs */
440 if ( !( state->as_recorded & ACL_STATE_RECORDED_VD ) ) {
441 state->as_vi_acl = a;
442 state->as_result = ret;
443 }
444 state->as_recorded |= ACL_STATE_RECORDED;
445 state->as_vd_ad = desc;
446 }
447 if ( be_null ) op->o_bd = NULL;
448 if ( maskp ) ACL_PRIV_ASSIGN( *maskp, mask );
449 return ret;
450 }
451
452
453 /*
454 * slap_acl_get - return the acl applicable to entry e, attribute
455 * attr. the acl returned is suitable for use in subsequent calls to
456 * acl_access_allowed().
457 */
458
459 static AccessControl *
460 slap_acl_get(
461 AccessControl *a,
462 int *count,
463 Operation *op,
464 Entry *e,
465 AttributeDescription *desc,
466 struct berval *val,
467 int nmatch,
468 regmatch_t *matches,
469 AccessControlState *state )
470 {
471 const char *attr;
472 int dnlen, patlen;
473 AccessControl *prev;
474
475 assert( e != NULL );
476 assert( count != NULL );
477 assert( desc != NULL );
478
479 attr = desc->ad_cname.bv_val;
480
481 assert( attr != NULL );
482
483 if( a == NULL ) {
484 if( op->o_bd == NULL ) {
485 a = frontendDB->be_acl;
486 } else {
487 a = op->o_bd->be_acl;
488 }
489 prev = NULL;
490
491 assert( a != NULL );
492
493 } else {
494 prev = a;
495 a = a->acl_next;
496 }
497
498 dnlen = e->e_nname.bv_len;
499
500 for ( ; a != NULL; prev = a, a = a->acl_next ) {
501 (*count) ++;
502
503 if ( a->acl_dn_pat.bv_len || ( a->acl_dn_style != ACL_STYLE_REGEX )) {
504 if ( a->acl_dn_style == ACL_STYLE_REGEX ) {
505 Debug( LDAP_DEBUG_ACL, "=> dnpat: [%d] %s nsub: %d\n",
506 *count, a->acl_dn_pat.bv_val, (int) a->acl_dn_re.re_nsub );
507 if (regexec(&a->acl_dn_re, e->e_ndn, nmatch, matches, 0))
508 continue;
509
510 } else {
511 Debug( LDAP_DEBUG_ACL, "=> dn: [%d] %s\n",
512 *count, a->acl_dn_pat.bv_val, 0 );
513 patlen = a->acl_dn_pat.bv_len;
514 if ( dnlen < patlen )
515 continue;
516
517 if ( a->acl_dn_style == ACL_STYLE_BASE ) {
518 /* base dn -- entire object DN must match */
519 if ( dnlen != patlen )
520 continue;
521
522 } else if ( a->acl_dn_style == ACL_STYLE_ONE ) {
523 ber_len_t rdnlen = 0;
524 int sep = 0;
525
526 if ( dnlen <= patlen )
527 continue;
528
529 if ( patlen > 0 ) {
530 if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
531 continue;
532 sep = 1;
533 }
534
535 rdnlen = dn_rdnlen( NULL, &e->e_nname );
536 if ( rdnlen != dnlen - patlen - sep )
537 continue;
538
539 } else if ( a->acl_dn_style == ACL_STYLE_SUBTREE ) {
540 if ( dnlen > patlen && !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
541 continue;
542
543 } else if ( a->acl_dn_style == ACL_STYLE_CHILDREN ) {
544 if ( dnlen <= patlen )
545 continue;
546 if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
547 continue;
548 }
549
550 if ( strcmp( a->acl_dn_pat.bv_val, e->e_ndn + dnlen - patlen ) != 0 )
551 continue;
552 }
553
554 Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] matched\n",
555 *count, 0, 0 );
556 }
557
558 if ( a->acl_attrs && !ad_inlist( desc, a->acl_attrs ) ) {
559 matches[0].rm_so = matches[0].rm_eo = -1;
560 continue;
561 }
562
563 /* Is this ACL only for a specific value? */
564 if ( a->acl_attrval.bv_len ) {
565 if ( val == NULL ) {
566 continue;
567 }
568
569 if( state && !( state->as_recorded & ACL_STATE_RECORDED_VD )) {
570 state->as_recorded |= ACL_STATE_RECORDED_VD;
571 state->as_vd_acl = prev;
572 state->as_vd_acl_count = *count - 1;
573 }
574
575 if ( a->acl_attrval_style == ACL_STYLE_REGEX ) {
576 Debug( LDAP_DEBUG_ACL,
577 "acl_get: valpat %s\n",
578 a->acl_attrval.bv_val, 0, 0 );
579 if ( regexec( &a->acl_attrval_re, val->bv_val, 0, NULL, 0 ) )
580 {
581 continue;
582 }
583
584 } else {
585 int match = 0;
586 const char *text;
587 Debug( LDAP_DEBUG_ACL,
588 "acl_get: val %s\n",
589 a->acl_attrval.bv_val, 0, 0 );
590
591 if ( a->acl_attrs[0].an_desc->ad_type->sat_syntax != slap_schema.si_syn_distinguishedName ) {
592 if (value_match( &match, desc,
593 a->acl_attrval_mr, 0,
594 val, &a->acl_attrval, &text ) != LDAP_SUCCESS ||
595 match )
596 continue;
597
598 } else {
599 int patlen, vdnlen;
600
601 patlen = a->acl_attrval.bv_len;
602 vdnlen = val->bv_len;
603
604 if ( vdnlen < patlen )
605 continue;
606
607 if ( a->acl_attrval_style == ACL_STYLE_BASE ) {
608 if ( vdnlen > patlen )
609 continue;
610
611 } else if ( a->acl_attrval_style == ACL_STYLE_ONE ) {
612 ber_len_t rdnlen = 0;
613
614 if ( !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) )
615 continue;
616
617 rdnlen = dn_rdnlen( NULL, val );
618 if ( rdnlen != vdnlen - patlen - 1 )
619 continue;
620
621 } else if ( a->acl_attrval_style == ACL_STYLE_SUBTREE ) {
622 if ( vdnlen > patlen && !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) )
623 continue;
624
625 } else if ( a->acl_attrval_style == ACL_STYLE_CHILDREN ) {
626 if ( vdnlen <= patlen )
627 continue;
628
629 if ( !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) )
630 continue;
631 }
632
633 if ( strcmp( a->acl_attrval.bv_val, val->bv_val + vdnlen - patlen ) )
634 continue;
635 }
636 }
637 }
638
639 if ( a->acl_filter != NULL ) {
640 ber_int_t rc = test_filter( NULL, e, a->acl_filter );
641 if ( rc != LDAP_COMPARE_TRUE ) {
642 continue;
643 }
644 }
645
646 Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] attr %s\n",
647 *count, attr, 0);
648 return a;
649 }
650
651 Debug( LDAP_DEBUG_ACL, "<= acl_get: done.\n", 0, 0, 0 );
652 return( NULL );
653 }
654
655 /*
656 * Record value-dependent access control state
657 */
658 #define ACL_RECORD_VALUE_STATE do { \
659 if( state && !( state->as_recorded & ACL_STATE_RECORDED_VD )) { \
660 state->as_recorded |= ACL_STATE_RECORDED_VD; \
661 state->as_vd_acl = a; \
662 state->as_vd_acl_count = count; \
663 } \
664 } while( 0 )
665
666 static int
667 acl_mask_dn(
668 Operation *op,
669 Entry *e,
670 AttributeDescription *desc,
671 struct berval *val,
672 AccessControl *a,
673 int nmatch,
674 regmatch_t *matches,
675 slap_dn_access *bdn,
676 struct berval *opndn )
677 {
678 /*
679 * if access applies to the entry itself, and the
680 * user is bound as somebody in the same namespace as
681 * the entry, OR the given dn matches the dn pattern
682 */
683 /*
684 * NOTE: styles "anonymous", "users" and "self"
685 * have been moved to enum slap_style_t, whose
686 * value is set in a_dn_style; however, the string
687 * is maintained in a_dn_pat.
688 */
689
690 if ( bdn->a_style == ACL_STYLE_ANONYMOUS ) {
691 if ( !BER_BVISEMPTY( opndn ) ) {
692 return 1;
693 }
694
695 } else if ( bdn->a_style == ACL_STYLE_USERS ) {
696 if ( BER_BVISEMPTY( opndn ) ) {
697 return 1;
698 }
699
700 } else if ( bdn->a_style == ACL_STYLE_SELF ) {
701 struct berval ndn, selfndn;
702 int level;
703
704 if ( BER_BVISEMPTY( opndn ) || BER_BVISNULL( &e->e_nname ) ) {
705 return 1;
706 }
707
708 level = bdn->a_self_level;
709 if ( level < 0 ) {
710 selfndn = *opndn;
711 ndn = e->e_nname;
712 level = -level;
713
714 } else {
715 ndn = *opndn;
716 selfndn = e->e_nname;
717 }
718
719 for ( ; level > 0; level-- ) {
720 if ( BER_BVISEMPTY( &ndn ) ) {
721 break;
722 }
723 dnParent( &ndn, &ndn );
724 }
725
726 if ( BER_BVISEMPTY( &ndn ) || !dn_match( &ndn, &selfndn ) )
727 {
728 return 1;
729 }
730
731 } else if ( bdn->a_style == ACL_STYLE_REGEX ) {
732 if ( !ber_bvccmp( &bdn->a_pat, '*' ) ) {
733 int tmp_nmatch;
734 regmatch_t tmp_matches[2],
735 *tmp_matchesp = tmp_matches;
736
737 int rc = 0;
738
739 switch ( a->acl_dn_style ) {
740 case ACL_STYLE_REGEX:
741 if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
742 tmp_matchesp = matches;
743 tmp_nmatch = nmatch;
744 break;
745 }
746 /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
747
748 case ACL_STYLE_BASE:
749 tmp_matches[0].rm_so = 0;
750 tmp_matches[0].rm_eo = e->e_nname.bv_len;
751 tmp_nmatch = 1;
752 break;
753
754 case ACL_STYLE_ONE:
755 case ACL_STYLE_SUBTREE:
756 case ACL_STYLE_CHILDREN:
757 tmp_matches[0].rm_so = 0;
758 tmp_matches[0].rm_eo = e->e_nname.bv_len;
759 tmp_matches[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
760 tmp_matches[1].rm_eo = e->e_nname.bv_len;
761 tmp_nmatch = 2;
762 break;
763
764 default:
765 /* error */
766 rc = 1;
767 break;
768 }
769
770 if ( rc ) {
771 return 1;
772 }
773
774 if ( !regex_matches( &bdn->a_pat, opndn->bv_val,
775 e->e_ndn, tmp_nmatch, tmp_matchesp ) )
776 {
777 return 1;
778 }
779 }
780
781 } else {
782 struct berval pat;
783 ber_len_t patlen, odnlen;
784 int got_match = 0;
785
786 if ( e->e_dn == NULL )
787 return 1;
788
789 if ( bdn->a_expand ) {
790 struct berval bv;
791 char buf[ACL_BUF_SIZE];
792
793 int tmp_nmatch;
794 regmatch_t tmp_matches[2],
795 *tmp_matchesp = tmp_matches;
796
797 int rc = 0;
798
799 bv.bv_len = sizeof( buf ) - 1;
800 bv.bv_val = buf;
801
802 switch ( a->acl_dn_style ) {
803 case ACL_STYLE_REGEX:
804 if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
805 tmp_matchesp = matches;
806 tmp_nmatch = nmatch;
807 break;
808 }
809 /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
810
811 case ACL_STYLE_BASE:
812 tmp_matches[0].rm_so = 0;
813 tmp_matches[0].rm_eo = e->e_nname.bv_len;
814 tmp_nmatch = 1;
815 break;
816
817 case ACL_STYLE_ONE:
818 case ACL_STYLE_SUBTREE:
819 case ACL_STYLE_CHILDREN:
820 tmp_matches[0].rm_so = 0;
821 tmp_matches[0].rm_eo = e->e_nname.bv_len;
822 tmp_matches[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
823 tmp_matches[1].rm_eo = e->e_nname.bv_len;
824 tmp_nmatch = 2;
825 break;
826
827 default:
828 /* error */
829 rc = 1;
830 break;
831 }
832
833 if ( rc ) {
834 return 1;
835 }
836
837 if ( acl_string_expand( &bv, &bdn->a_pat,
838 e->e_nname.bv_val,
839 tmp_nmatch, tmp_matchesp ) )
840 {
841 return 1;
842 }
843
844 if ( dnNormalize(0, NULL, NULL, &bv,
845 &pat, op->o_tmpmemctx )
846 != LDAP_SUCCESS )
847 {
848 /* did not expand to a valid dn */
849 return 1;
850 }
851
852 } else {
853 pat = bdn->a_pat;
854 }
855
856 patlen = pat.bv_len;
857 odnlen = opndn->bv_len;
858 if ( odnlen < patlen ) {
859 goto dn_match_cleanup;
860
861 }
862
863 if ( bdn->a_style == ACL_STYLE_BASE ) {
864 /* base dn -- entire object DN must match */
865 if ( odnlen != patlen ) {
866 goto dn_match_cleanup;
867 }
868
869 } else if ( bdn->a_style == ACL_STYLE_ONE ) {
870 ber_len_t rdnlen = 0;
871
872 if ( odnlen <= patlen ) {
873 goto dn_match_cleanup;
874 }
875
876 if ( !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) {
877 goto dn_match_cleanup;
878 }
879
880 rdnlen = dn_rdnlen( NULL, opndn );
881 if ( rdnlen - ( odnlen - patlen - 1 ) != 0 ) {
882 goto dn_match_cleanup;
883 }
884
885 } else if ( bdn->a_style == ACL_STYLE_SUBTREE ) {
886 if ( odnlen > patlen && !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) {
887 goto dn_match_cleanup;
888 }
889
890 } else if ( bdn->a_style == ACL_STYLE_CHILDREN ) {
891 if ( odnlen <= patlen ) {
892 goto dn_match_cleanup;
893 }
894
895 if ( !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) {
896 goto dn_match_cleanup;
897 }
898
899 } else if ( bdn->a_style == ACL_STYLE_LEVEL ) {
900 int level = bdn->a_level;
901 struct berval ndn;
902
903 if ( odnlen <= patlen ) {
904 goto dn_match_cleanup;
905 }
906
907 if ( level > 0 && !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) )
908 {
909 goto dn_match_cleanup;
910 }
911
912 ndn = *opndn;
913 for ( ; level > 0; level-- ) {
914 if ( BER_BVISEMPTY( &ndn ) ) {
915 goto dn_match_cleanup;
916 }
917 dnParent( &ndn, &ndn );
918 if ( ndn.bv_len < patlen ) {
919 goto dn_match_cleanup;
920 }
921 }
922
923 if ( ndn.bv_len != patlen ) {
924 goto dn_match_cleanup;
925 }
926 }
927
928 got_match = !strcmp( pat.bv_val, &opndn->bv_val[ odnlen - patlen ] );
929
930 dn_match_cleanup:;
931 if ( pat.bv_val != bdn->a_pat.bv_val ) {
932 slap_sl_free( pat.bv_val, op->o_tmpmemctx );
933 }
934
935 if ( !got_match ) {
936 return 1;
937 }
938 }
939
940 return 0;
941 }
942
943 static int
944 acl_mask_dnattr(
945 Operation *op,
946 Entry *e,
947 struct berval *val,
948 AccessControl *a,
949 Access *b,
950 int i,
951 regmatch_t *matches,
952 int count,
953 AccessControlState *state,
954 slap_dn_access *bdn,
955 struct berval *opndn )
956 {
957 Attribute *at;
958 struct berval bv;
959 int rc, match = 0;
960 const char *text;
961 const char *attr = bdn->a_at->ad_cname.bv_val;
962
963 assert( attr != NULL );
964
965 if ( BER_BVISEMPTY( opndn ) ) {
966 return 1;
967 }
968
969 Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n", attr, 0, 0 );
970 bv = *opndn;
971
972 /* see if asker is listed in dnattr */
973 for ( at = attrs_find( e->e_attrs, bdn->a_at );
974 at != NULL;
975 at = attrs_find( at->a_next, bdn->a_at ) )
976 {
977 if ( attr_valfind( at,
978 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
979 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
980 &bv, NULL, op->o_tmpmemctx ) == 0 )
981 {
982 /* found it */
983 match = 1;
984 break;
985 }
986 }
987
988 if ( match ) {
989 /* have a dnattr match. if this is a self clause then
990 * the target must also match the op dn.
991 */
992 if ( bdn->a_self ) {
993 /* check if the target is an attribute. */
994 if ( val == NULL ) return 1;
995
996 /* target is attribute, check if the attribute value
997 * is the op dn.
998 */
999 rc = value_match( &match, bdn->a_at,
1000 bdn->a_at->ad_type->sat_equality, 0,
1001 val, &bv, &text );
1002 /* on match error or no match, fail the ACL clause */
1003 if ( rc != LDAP_SUCCESS || match != 0 )
1004 return 1;
1005 }
1006
1007 } else {
1008 /* no dnattr match, check if this is a self clause */
1009 if ( ! bdn->a_self )
1010 return 1;
1011
1012 ACL_RECORD_VALUE_STATE;
1013
1014 /* this is a self clause, check if the target is an
1015 * attribute.
1016 */
1017 if ( val == NULL )
1018 return 1;
1019
1020 /* target is attribute, check if the attribute value
1021 * is the op dn.
1022 */
1023 rc = value_match( &match, bdn->a_at,
1024 bdn->a_at->ad_type->sat_equality, 0,
1025 val, &bv, &text );
1026
1027 /* on match error or no match, fail the ACL clause */
1028 if ( rc != LDAP_SUCCESS || match != 0 )
1029 return 1;
1030 }
1031
1032 return 0;
1033 }
1034
1035
1036 /*
1037 * slap_acl_mask - modifies mask based upon the given acl and the
1038 * requested access to entry e, attribute attr, value val. if val
1039 * is null, access to the whole attribute is assumed (all values).
1040 *
1041 * returns 0 access NOT allowed
1042 * 1 access allowed
1043 */
1044
1045 static slap_control_t
1046 slap_acl_mask(
1047 AccessControl *a,
1048 slap_mask_t *mask,
1049 Operation *op,
1050 Entry *e,
1051 AttributeDescription *desc,
1052 struct berval *val,
1053 int nmatch,
1054 regmatch_t *matches,
1055 int count,
1056 AccessControlState *state )
1057 {
1058 int i;
1059 Access *b;
1060 #ifdef LDAP_DEBUG
1061 char accessmaskbuf[ACCESSMASK_MAXLEN];
1062 #endif /* DEBUG */
1063 const char *attr;
1064 slap_mask_t a2pmask = ACL_ACCESS2PRIV( *mask );
1065
1066 assert( a != NULL );
1067 assert( mask != NULL );
1068 assert( desc != NULL );
1069
1070 attr = desc->ad_cname.bv_val;
1071
1072 assert( attr != NULL );
1073
1074 Debug( LDAP_DEBUG_ACL,
1075 "=> acl_mask: access to entry \"%s\", attr \"%s\" requested\n",
1076 e->e_dn, attr, 0 );
1077
1078 Debug( LDAP_DEBUG_ACL,
1079 "=> acl_mask: to %s by \"%s\", (%s) \n",
1080 val ? "value" : "all values",
1081 op->o_ndn.bv_val ? op->o_ndn.bv_val : "",
1082 accessmask2str( *mask, accessmaskbuf, 1 ) );
1083
1084
1085 b = a->acl_access;
1086 i = 1;
1087
1088 for ( ; b != NULL; b = b->a_next, i++ ) {
1089 slap_mask_t oldmask, modmask;
1090
1091 ACL_INVALIDATE( modmask );
1092
1093 /* AND <who> clauses */
1094 if ( !BER_BVISEMPTY( &b->a_dn_pat ) ) {
1095 Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n",
1096 b->a_dn_pat.bv_val, 0, 0);
1097 /*
1098 * if access applies to the entry itself, and the
1099 * user is bound as somebody in the same namespace as
1100 * the entry, OR the given dn matches the dn pattern
1101 */
1102 /*
1103 * NOTE: styles "anonymous", "users" and "self"
1104 * have been moved to enum slap_style_t, whose
1105 * value is set in a_dn_style; however, the string
1106 * is maintained in a_dn_pat.
1107 */
1108
1109 if ( acl_mask_dn( op, e, desc, val, a, nmatch, matches,
1110 &b->a_dn, &op->o_ndn ) )
1111 {
1112 continue;
1113 }
1114 }
1115
1116 if ( !BER_BVISEMPTY( &b->a_realdn_pat ) ) {
1117 struct berval ndn;
1118
1119 Debug( LDAP_DEBUG_ACL, "<= check a_realdn_pat: %s\n",
1120 b->a_realdn_pat.bv_val, 0, 0);
1121 /*
1122 * if access applies to the entry itself, and the
1123 * user is bound as somebody in the same namespace as
1124 * the entry, OR the given dn matches the dn pattern
1125 */
1126 /*
1127 * NOTE: styles "anonymous", "users" and "self"
1128 * have been moved to enum slap_style_t, whose
1129 * value is set in a_dn_style; however, the string
1130 * is maintained in a_dn_pat.
1131 */
1132
1133 if ( op->o_conn && !BER_BVISNULL( &op->o_conn->c_ndn ) )
1134 {
1135 ndn = op->o_conn->c_ndn;
1136 } else {
1137 ndn = op->o_ndn;
1138 }
1139
1140 if ( acl_mask_dn( op, e, desc, val, a, nmatch, matches,
1141 &b->a_realdn, &ndn ) )
1142 {
1143 continue;
1144 }
1145 }
1146
1147 if ( !BER_BVISEMPTY( &b->a_sockurl_pat ) ) {
1148 if ( ! op->o_conn->c_listener ) {
1149 continue;
1150 }
1151 Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n",
1152 b->a_sockurl_pat.bv_val, 0, 0 );
1153
1154 if ( !ber_bvccmp( &b->a_sockurl_pat, '*' ) ) {
1155 if ( b->a_sockurl_style == ACL_STYLE_REGEX) {
1156 if (!regex_matches( &b->a_sockurl_pat, op->o_conn->c_listener_url.bv_val,
1157 e->e_ndn, nmatch, matches ) )
1158 {
1159 continue;
1160 }
1161
1162 } else if ( b->a_sockurl_style == ACL_STYLE_EXPAND ) {
1163 struct berval bv;
1164 char buf[ACL_BUF_SIZE];
1165
1166 bv.bv_len = sizeof( buf ) - 1;
1167 bv.bv_val = buf;
1168 if ( acl_string_expand( &bv, &b->a_sockurl_pat,
1169 e->e_ndn, nmatch, matches ) )
1170 {
1171 continue;
1172 }
1173
1174 if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_listener_url ) != 0 )
1175 {
1176 continue;
1177 }
1178
1179 } else {
1180 if ( ber_bvstrcasecmp( &b->a_sockurl_pat, &op->o_conn->c_listener_url ) != 0 )
1181 {
1182 continue;
1183 }
1184 }
1185 }
1186 }
1187
1188 if ( !BER_BVISEMPTY( &b->a_domain_pat ) ) {
1189 if ( !op->o_conn->c_peer_domain.bv_val ) {
1190 continue;
1191 }
1192 Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n",
1193 b->a_domain_pat.bv_val, 0, 0 );
1194 if ( !ber_bvccmp( &b->a_domain_pat, '*' ) ) {
1195 if ( b->a_domain_style == ACL_STYLE_REGEX) {
1196 if (!regex_matches( &b->a_domain_pat, op->o_conn->c_peer_domain.bv_val,
1197 e->e_ndn, nmatch, matches ) )
1198 {
1199 continue;
1200 }
1201 } else {
1202 char buf[ACL_BUF_SIZE];
1203
1204 struct berval cmp = op->o_conn->c_peer_domain;
1205 struct berval pat = b->a_domain_pat;
1206
1207 if ( b->a_domain_expand ) {
1208 struct berval bv;
1209
1210 bv.bv_len = sizeof(buf) - 1;
1211 bv.bv_val = buf;
1212
1213 if ( acl_string_expand(&bv, &b->a_domain_pat,
1214 e->e_ndn, nmatch, matches) )
1215 {
1216 continue;
1217 }
1218 pat = bv;
1219 }
1220
1221 if ( b->a_domain_style == ACL_STYLE_SUBTREE ) {
1222 int offset = cmp.bv_len - pat.bv_len;
1223 if ( offset < 0 ) {
1224 continue;
1225 }
1226
1227 if ( offset == 1 || ( offset > 1 && cmp.bv_val[ offset - 1 ] != '.' ) ) {
1228 continue;
1229 }
1230
1231 /* trim the domain */
1232 cmp.bv_val = &cmp.bv_val[ offset ];
1233 cmp.bv_len -= offset;
1234 }
1235
1236 if ( ber_bvstrcasecmp( &pat, &cmp ) != 0 ) {
1237 continue;
1238 }
1239 }
1240 }
1241 }
1242
1243 if ( !BER_BVISEMPTY( &b->a_peername_pat ) ) {
1244 if ( !op->o_conn->c_peer_name.bv_val ) {
1245 continue;
1246 }
1247 Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n",
1248 b->a_peername_pat.bv_val, 0, 0 );
1249 if ( !ber_bvccmp( &b->a_peername_pat, '*' ) ) {
1250 if ( b->a_peername_style == ACL_STYLE_REGEX ) {
1251 if (!regex_matches( &b->a_peername_pat, op->o_conn->c_peer_name.bv_val,
1252 e->e_ndn, nmatch, matches ) )
1253 {
1254 continue;
1255 }
1256
1257 } else {
1258 /* try exact match */
1259 if ( b->a_peername_style == ACL_STYLE_BASE ) {
1260 if ( ber_bvstrcasecmp( &b->a_peername_pat, &op->o_conn->c_peer_name ) != 0 ) {
1261 continue;
1262 }
1263
1264 } else if ( b->a_peername_style == ACL_STYLE_EXPAND ) {
1265 struct berval bv;
1266 char buf[ACL_BUF_SIZE];
1267
1268 bv.bv_len = sizeof( buf ) - 1;
1269 bv.bv_val = buf;
1270 if ( acl_string_expand( &bv, &b->a_peername_pat,
1271 e->e_ndn, nmatch, matches ) )
1272 {
1273 continue;
1274 }
1275
1276 if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_peer_name ) != 0 ) {
1277 continue;
1278 }
1279
1280 /* extract IP and try exact match */
1281 } else if ( b->a_peername_style == ACL_STYLE_IP ) {
1282 char *port;
1283 char buf[STRLENOF("255.255.255.255") + 1];
1284 struct berval ip;
1285 unsigned long addr;
1286 int port_number = -1;
1287
1288 if ( strncasecmp( op->o_conn->c_peer_name.bv_val,
1289 acl_bv_ip_eq.bv_val,
1290 acl_bv_ip_eq.bv_len ) != 0 )
1291 continue;
1292
1293 ip.bv_val = op->o_conn->c_peer_name.bv_val + acl_bv_ip_eq.bv_len;
1294 ip.bv_len = op->o_conn->c_peer_name.bv_len - acl_bv_ip_eq.bv_len;
1295
1296 port = strrchr( ip.bv_val, ':' );
1297 if ( port ) {
1298 ip.bv_len = port - ip.bv_val;
1299 ++port;
1300 if ( lutil_atoi( &port_number, port ) != 0 )
1301 continue;
1302 }
1303
1304 /* the port check can be anticipated here */
1305 if ( b->a_peername_port != -1 && port_number != b->a_peername_port )
1306 continue;
1307
1308 /* address longer than expected? */
1309 if ( ip.bv_len >= sizeof(buf) )
1310 continue;
1311
1312 AC_MEMCPY( buf, ip.bv_val, ip.bv_len );
1313 buf[ ip.bv_len ] = '\0';
1314
1315 addr = inet_addr( buf );
1316
1317 /* unable to convert? */
1318 if ( addr == (unsigned long)(-1) )
1319 continue;
1320
1321 if ( (addr & b->a_peername_mask) != b->a_peername_addr )
1322 continue;
1323
1324 #ifdef LDAP_PF_INET6
1325 /* extract IPv6 and try exact match */
1326 } else if ( b->a_peername_style == ACL_STYLE_IPV6 ) {
1327 char *port;
1328 char buf[STRLENOF("FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF") + 1];
1329 struct berval ip;
1330 struct in6_addr addr;
1331 int port_number = -1;
1332
1333 if ( strncasecmp( op->o_conn->c_peer_name.bv_val,
1334 acl_bv_ipv6_eq.bv_val,
1335 acl_bv_ipv6_eq.bv_len ) != 0 )
1336 continue;
1337
1338 ip.bv_val = op->o_conn->c_peer_name.bv_val + acl_bv_ipv6_eq.bv_len;
1339 ip.bv_len = op->o_conn->c_peer_name.bv_len - acl_bv_ipv6_eq.bv_len;
1340
1341 port = strrchr( ip.bv_val, ']' );
1342 if ( port ) {
1343 ip.bv_len = port - ip.bv_val;
1344 ++port;
1345 if ( port[0] == ':' && lutil_atoi( &port_number, ++port ) != 0 )
1346 continue;
1347 }
1348
1349 /* the port check can be anticipated here */
1350 if ( b->a_peername_port != -1 && port_number != b->a_peername_port )
1351 continue;
1352
1353 /* address longer than expected? */
1354 if ( ip.bv_len >= sizeof(buf) )
1355 continue;
1356
1357 AC_MEMCPY( buf, ip.bv_val, ip.bv_len );
1358 buf[ ip.bv_len ] = '\0';
1359
1360 if ( inet_pton( AF_INET6, buf, &addr ) != 1 )
1361 continue;
1362
1363 /* check mask */
1364 if ( !slap_addr6_mask( &addr, &b->a_peername_mask6, &b->a_peername_addr6 ) )
1365 continue;
1366 #endif /* LDAP_PF_INET6 */
1367
1368 #ifdef LDAP_PF_LOCAL
1369 /* extract path and try exact match */
1370 } else if ( b->a_peername_style == ACL_STYLE_PATH ) {
1371 struct berval path;
1372
1373 if ( strncmp( op->o_conn->c_peer_name.bv_val,
1374 acl_bv_path_eq.bv_val,
1375 acl_bv_path_eq.bv_len ) != 0 )
1376 continue;
1377
1378 path.bv_val = op->o_conn->c_peer_name.bv_val
1379 + acl_bv_path_eq.bv_len;
1380 path.bv_len = op->o_conn->c_peer_name.bv_len
1381 - acl_bv_path_eq.bv_len;
1382
1383 if ( ber_bvcmp( &b->a_peername_pat, &path ) != 0 )
1384 continue;
1385
1386 #endif /* LDAP_PF_LOCAL */
1387
1388 /* exact match (very unlikely...) */
1389 } else if ( ber_bvcmp( &op->o_conn->c_peer_name, &b->a_peername_pat ) != 0 ) {
1390 continue;
1391 }
1392 }
1393 }
1394 }
1395
1396 if ( !BER_BVISEMPTY( &b->a_sockname_pat ) ) {
1397 if ( BER_BVISNULL( &op->o_conn->c_sock_name ) ) {
1398 continue;
1399 }
1400 Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n",
1401 b->a_sockname_pat.bv_val, 0, 0 );
1402 if ( !ber_bvccmp( &b->a_sockname_pat, '*' ) ) {
1403 if ( b->a_sockname_style == ACL_STYLE_REGEX) {
1404 if (!regex_matches( &b->a_sockname_pat, op->o_conn->c_sock_name.bv_val,
1405 e->e_ndn, nmatch, matches ) )
1406 {
1407 continue;
1408 }
1409
1410 } else if ( b->a_sockname_style == ACL_STYLE_EXPAND ) {
1411 struct berval bv;
1412 char buf[ACL_BUF_SIZE];
1413
1414 bv.bv_len = sizeof( buf ) - 1;
1415 bv.bv_val = buf;
1416 if ( acl_string_expand( &bv, &b->a_sockname_pat,
1417 e->e_ndn, nmatch, matches ) )
1418 {
1419 continue;
1420 }
1421
1422 if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_sock_name ) != 0 ) {
1423 continue;
1424 }
1425
1426 } else {
1427 if ( ber_bvstrcasecmp( &b->a_sockname_pat, &op->o_conn->c_sock_name ) != 0 ) {
1428 continue;
1429 }
1430 }
1431 }
1432 }
1433
1434 if ( b->a_dn_at != NULL ) {
1435 if ( acl_mask_dnattr( op, e, val, a, b, i,
1436 matches, count, state,
1437 &b->a_dn, &op->o_ndn ) )
1438 {
1439 continue;
1440 }
1441 }
1442
1443 if ( b->a_realdn_at != NULL ) {
1444 struct berval ndn;
1445
1446 if ( op->o_conn && !BER_BVISNULL( &op->o_conn->c_ndn ) )
1447 {
1448 ndn = op->o_conn->c_ndn;
1449 } else {
1450 ndn = op->o_ndn;
1451 }
1452
1453 if ( acl_mask_dnattr( op, e, val, a, b, i,
1454 matches, count, state,
1455 &b->a_realdn, &ndn ) )
1456 {
1457 continue;
1458 }
1459 }
1460
1461 if ( !BER_BVISEMPTY( &b->a_group_pat ) ) {
1462 struct berval bv;
1463 struct berval ndn = BER_BVNULL;
1464 int rc;
1465
1466 if ( op->o_ndn.bv_len == 0 ) {
1467 continue;
1468 }
1469
1470 Debug( LDAP_DEBUG_ACL, "<= check a_group_pat: %s\n",
1471 b->a_group_pat.bv_val, 0, 0 );
1472
1473 /* b->a_group is an unexpanded entry name, expanded it should be an
1474 * entry with objectclass group* and we test to see if odn is one of
1475 * the values in the attribute group
1476 */
1477 /* see if asker is listed in dnattr */
1478 if ( b->a_group_style == ACL_STYLE_EXPAND ) {
1479 char buf[ACL_BUF_SIZE];
1480 int tmp_nmatch;
1481 regmatch_t tmp_matches[2],
1482 *tmp_matchesp = tmp_matches;
1483
1484 bv.bv_len = sizeof(buf) - 1;
1485 bv.bv_val = buf;
1486
1487 rc = 0;
1488
1489 switch ( a->acl_dn_style ) {
1490 case ACL_STYLE_REGEX:
1491 if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
1492 tmp_matchesp = matches;
1493 tmp_nmatch = nmatch;
1494 break;
1495 }
1496
1497 /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
1498 case ACL_STYLE_BASE:
1499 tmp_matches[0].rm_so = 0;
1500 tmp_matches[0].rm_eo = e->e_nname.bv_len;
1501 tmp_nmatch = 1;
1502 break;
1503
1504 case ACL_STYLE_ONE:
1505 case ACL_STYLE_SUBTREE:
1506 case ACL_STYLE_CHILDREN:
1507 tmp_matches[0].rm_so = 0;
1508 tmp_matches[0].rm_eo = e->e_nname.bv_len;
1509 tmp_matches[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
1510 tmp_matches[1].rm_eo = e->e_nname.bv_len;
1511 tmp_nmatch = 2;
1512 break;
1513
1514 default:
1515 /* error */
1516 rc = 1;
1517 break;
1518 }
1519
1520 if ( rc ) {
1521 continue;
1522 }
1523
1524 if ( acl_string_expand( &bv, &b->a_group_pat,
1525 e->e_nname.bv_val,
1526 tmp_nmatch, tmp_matchesp ) )
1527 {
1528 continue;
1529 }
1530
1531 if ( dnNormalize( 0, NULL, NULL, &bv, &ndn,
1532 op->o_tmpmemctx ) != LDAP_SUCCESS )
1533 {
1534 /* did not expand to a valid dn */
1535 continue;
1536 }
1537
1538 bv = ndn;
1539
1540 } else {
1541 bv = b->a_group_pat;
1542 }
1543
1544 rc = backend_group( op, e, &bv, &op->o_ndn,
1545 b->a_group_oc, b->a_group_at );
1546
1547 if ( ndn.bv_val ) {
1548 slap_sl_free( ndn.bv_val, op->o_tmpmemctx );
1549 }
1550
1551 if ( rc != 0 ) {
1552 continue;
1553 }
1554 }
1555
1556 if ( !BER_BVISEMPTY( &b->a_set_pat ) ) {
1557 struct berval bv;
1558 char buf[ACL_BUF_SIZE];
1559
1560 Debug( LDAP_DEBUG_ACL, "<= check a_set_pat: %s\n",
1561 b->a_set_pat.bv_val, 0, 0 );
1562
1563 if ( b->a_set_style == ACL_STYLE_EXPAND ) {
1564 int tmp_nmatch;
1565 regmatch_t tmp_matches[2],
1566 *tmp_matchesp = tmp_matches;
1567 int rc = 0;
1568
1569 bv.bv_len = sizeof( buf ) - 1;
1570 bv.bv_val = buf;
1571
1572 rc = 0;
1573
1574 switch ( a->acl_dn_style ) {
1575 case ACL_STYLE_REGEX:
1576 if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
1577 tmp_matchesp = matches;
1578 tmp_nmatch = nmatch;
1579 break;
1580 }
1581
1582 /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
1583 case ACL_STYLE_BASE:
1584 tmp_matches[0].rm_so = 0;
1585 tmp_matches[0].rm_eo = e->e_nname.bv_len;
1586 tmp_nmatch = 1;
1587 break;
1588
1589 case ACL_STYLE_ONE:
1590 case ACL_STYLE_SUBTREE:
1591 case ACL_STYLE_CHILDREN:
1592 tmp_matches[0].rm_so = 0;
1593 tmp_matches[0].rm_eo = e->e_nname.bv_len;
1594 tmp_matches[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
1595 tmp_matches[1].rm_eo = e->e_nname.bv_len;
1596 tmp_nmatch = 2;
1597 break;
1598
1599 default:
1600 /* error */
1601 rc = 1;
1602 break;
1603 }
1604
1605 if ( rc ) {
1606 continue;
1607 }
1608
1609 if ( acl_string_expand( &bv, &b->a_set_pat,
1610 e->e_nname.bv_val,
1611 tmp_nmatch, tmp_matchesp ) )
1612 {
1613 continue;
1614 }
1615
1616 } else {
1617 bv = b->a_set_pat;
1618 }
1619
1620 if ( acl_match_set( &bv, op, e, NULL ) == 0 ) {
1621 continue;
1622 }
1623 }
1624
1625 if ( b->a_authz.sai_ssf ) {
1626 Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_ssf: ACL %u > OP %u\n",
1627 b->a_authz.sai_ssf, op->o_ssf, 0 );
1628 if ( b->a_authz.sai_ssf > op->o_ssf ) {
1629 continue;
1630 }
1631 }
1632
1633 if ( b->a_authz.sai_transport_ssf ) {
1634 Debug( LDAP_DEBUG_ACL,
1635 "<= check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
1636 b->a_authz.sai_transport_ssf, op->o_transport_ssf, 0 );
1637 if ( b->a_authz.sai_transport_ssf > op->o_transport_ssf ) {
1638 continue;
1639 }
1640 }
1641
1642 if ( b->a_authz.sai_tls_ssf ) {
1643 Debug( LDAP_DEBUG_ACL,
1644 "<= check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
1645 b->a_authz.sai_tls_ssf, op->o_tls_ssf, 0 );
1646 if ( b->a_authz.sai_tls_ssf > op->o_tls_ssf ) {
1647 continue;
1648 }
1649 }
1650
1651 if ( b->a_authz.sai_sasl_ssf ) {
1652 Debug( LDAP_DEBUG_ACL,
1653 "<= check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
1654 b->a_authz.sai_sasl_ssf, op->o_sasl_ssf, 0 );
1655 if ( b->a_authz.sai_sasl_ssf > op->o_sasl_ssf ) {
1656 continue;
1657 }
1658 }
1659
1660 /* check for the "self" modifier in the <access> field */
1661 if ( b->a_dn.a_self ) {
1662 const char *dummy;
1663 int rc, match = 0;
1664
1665 ACL_RECORD_VALUE_STATE;
1666
1667 /* must have DN syntax */
1668 if ( desc->ad_type->sat_syntax != slap_schema.si_syn_distinguishedName &&
1669 !is_at_syntax( desc->ad_type, SLAPD_NAMEUID_SYNTAX )) continue;
1670
1671 /* check if the target is an attribute. */
1672 if ( val == NULL ) continue;
1673
1674 /* a DN must be present */
1675 if ( BER_BVISEMPTY( &op->o_ndn ) ) {
1676 continue;
1677 }
1678
1679 /* target is attribute, check if the attribute value
1680 * is the op dn.
1681 */
1682 rc = value_match( &match, desc,
1683 desc->ad_type->sat_equality, 0,
1684 val, &op->o_ndn, &dummy );
1685 /* on match error or no match, fail the ACL clause */
1686 if ( rc != LDAP_SUCCESS || match != 0 )
1687 continue;
1688 }
1689
1690 #ifdef SLAP_DYNACL
1691 if ( b->a_dynacl ) {
1692 slap_dynacl_t *da;
1693 slap_access_t tgrant, tdeny;
1694
1695 Debug( LDAP_DEBUG_ACL, "<= check a_dynacl\n",
1696 0, 0, 0 );
1697
1698 /* this case works different from the others above.
1699 * since dynamic ACL's themselves give permissions, we need
1700 * to first check b->a_access_mask, the ACL's access level.
1701 */
1702 /* first check if the right being requested
1703 * is allowed by the ACL clause.
1704 */
1705 if ( ! ACL_PRIV_ISSET( b->a_access_mask, a2pmask ) ) {
1706 continue;
1707 }
1708
1709 /* start out with nothing granted, nothing denied */
1710 ACL_INVALIDATE(tgrant);
1711 ACL_INVALIDATE(tdeny);
1712
1713 for ( da = b->a_dynacl; da; da = da->da_next ) {
1714 slap_access_t grant,
1715 deny;
1716
1717 ACL_INVALIDATE(grant);
1718 ACL_INVALIDATE(deny);
1719
1720 Debug( LDAP_DEBUG_ACL, " <= check a_dynacl: %s\n",
1721 da->da_name, 0, 0 );
1722
1723 (void)da->da_mask( da->da_private, op, e, desc,
1724 val, nmatch, matches, &grant, &deny );
1725
1726 tgrant |= grant;
1727 tdeny |= deny;
1728 }
1729
1730 /* remove anything that the ACL clause does not allow */
1731 tgrant &= b->a_access_mask & ACL_PRIV_MASK;
1732 tdeny &= ACL_PRIV_MASK;
1733
1734 /* see if we have anything to contribute */
1735 if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) {
1736 continue;
1737 }
1738
1739 /* this could be improved by changing slap_acl_mask so that it can deal with
1740 * by clauses that return grant/deny pairs. Right now, it does either
1741 * additive or subtractive rights, but not both at the same time. So,
1742 * we need to combine the grant/deny pair into a single rights mask in
1743 * a smart way: if either grant or deny is "empty", then we use the
1744 * opposite as is, otherwise we remove any denied rights from the grant
1745 * rights mask and construct an additive mask.
1746 */
1747 if (ACL_IS_INVALID(tdeny)) {
1748 modmask = tgrant | ACL_PRIV_ADDITIVE;
1749
1750 } else if (ACL_IS_INVALID(tgrant)) {
1751 modmask = tdeny | ACL_PRIV_SUBSTRACTIVE;
1752
1753 } else {
1754 modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE;
1755 }
1756
1757 } else
1758 #endif /* SLAP_DYNACL */
1759 {
1760 modmask = b->a_access_mask;
1761 }
1762
1763 Debug( LDAP_DEBUG_ACL,
1764 "<= acl_mask: [%d] applying %s (%s)\n",
1765 i, accessmask2str( modmask, accessmaskbuf, 1 ),
1766 b->a_type == ACL_CONTINUE
1767 ? "continue"
1768 : b->a_type == ACL_BREAK
1769 ? "break"
1770 : "stop" );
1771 /* save old mask */
1772 oldmask = *mask;
1773
1774 if( ACL_IS_ADDITIVE(modmask) ) {
1775 /* add privs */
1776 ACL_PRIV_SET( *mask, modmask );
1777
1778 /* cleanup */
1779 ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
1780
1781 } else if( ACL_IS_SUBTRACTIVE(modmask) ) {
1782 /* substract privs */
1783 ACL_PRIV_CLR( *mask, modmask );
1784
1785 /* cleanup */
1786 ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
1787
1788 } else {
1789 /* assign privs */
1790 *mask = modmask;
1791 }
1792
1793 a2pmask = *mask;
1794
1795 Debug( LDAP_DEBUG_ACL,
1796 "<= acl_mask: [%d] mask: %s\n",
1797 i, accessmask2str(*mask, accessmaskbuf, 1), 0 );
1798
1799 if( b->a_type == ACL_CONTINUE ) {
1800 continue;
1801
1802 } else if ( b->a_type == ACL_BREAK ) {
1803 return ACL_BREAK;
1804
1805 } else {
1806 return ACL_STOP;
1807 }
1808 }
1809
1810 /* implicit "by * none" clause */
1811 ACL_INIT(*mask);
1812
1813 Debug( LDAP_DEBUG_ACL,
1814 "<= acl_mask: no more <who> clauses, returning %s (stop)\n",
1815 accessmask2str(*mask, accessmaskbuf, 1), 0, 0 );
1816 return ACL_STOP;
1817 }
1818
1819 /*
1820 * acl_check_modlist - check access control on the given entry to see if
1821 * it allows the given modifications by the user associated with op.
1822 * returns 1 if mods allowed ok
1823 * 0 mods not allowed
1824 */
1825
1826 int
1827 acl_check_modlist(
1828 Operation *op,
1829 Entry *e,
1830 Modifications *mlist )
1831 {
1832 struct berval *bv;
1833 AccessControlState state = ACL_STATE_INIT;
1834 Backend *be;
1835 int be_null = 0;
1836 int ret = 1; /* default is access allowed */
1837
1838 be = op->o_bd;
1839 if ( be == NULL ) {
1840 be = LDAP_STAILQ_FIRST(&backendDB);
1841 be_null = 1;
1842 op->o_bd = be;
1843 }
1844 assert( be != NULL );
1845
1846 /* short circuit root database access */
1847 if ( be_isroot( op ) ) {
1848 Debug( LDAP_DEBUG_ACL,
1849 "<= acl_access_allowed: granted to database root\n",
1850 0, 0, 0 );
1851 goto done;
1852 }
1853
1854 /* use backend default access if no backend acls */
1855 if( op->o_bd != NULL && op->o_bd->be_acl == NULL ) {
1856 Debug( LDAP_DEBUG_ACL,
1857 "=> access_allowed: backend default %s access %s to \"%s\"\n",
1858 access2str( ACL_WRITE ),
1859 op->o_bd->be_dfltaccess >= ACL_WRITE
1860 ? "granted" : "denied",
1861 op->o_dn.bv_val );
1862 ret = (op->o_bd->be_dfltaccess >= ACL_WRITE);
1863 goto done;
1864 }
1865
1866 for ( ; mlist != NULL; mlist = mlist->sml_next ) {
1867 /*
1868 * Internal mods are ignored by ACL_WRITE checking
1869 */
1870 if ( mlist->sml_flags & SLAP_MOD_INTERNAL ) {
1871 Debug( LDAP_DEBUG_ACL, "acl: internal mod %s:"
1872 " modify access granted\n",
1873 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
1874 continue;
1875 }
1876
1877 /*
1878 * no-user-modification operational attributes are ignored
1879 * by ACL_WRITE checking as any found here are not provided
1880 * by the user
1881 */
1882 if ( is_at_no_user_mod( mlist->sml_desc->ad_type )
1883 && ! ( mlist->sml_flags & SLAP_MOD_MANAGING ) )
1884 {
1885 Debug( LDAP_DEBUG_ACL, "acl: no-user-mod %s:"
1886 " modify access granted\n",
1887 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
1888 continue;
1889 }
1890
1891 switch ( mlist->sml_op ) {
1892 case LDAP_MOD_REPLACE:
1893 case LDAP_MOD_INCREMENT:
1894 /*
1895 * We must check both permission to delete the whole
1896 * attribute and permission to add the specific attributes.
1897 * This prevents abuse from selfwriters.
1898 */
1899 if ( ! access_allowed( op, e,
1900 mlist->sml_desc, NULL,
1901 ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WDEL,
1902 &state ) )
1903 {
1904 ret = 0;
1905 goto done;
1906 }
1907
1908 if ( mlist->sml_values == NULL ) break;
1909
1910 /* fall thru to check value to add */
1911
1912 case LDAP_MOD_ADD:
1913 assert( mlist->sml_values != NULL );
1914
1915 for ( bv = mlist->sml_nvalues
1916 ? mlist->sml_nvalues : mlist->sml_values;
1917 bv->bv_val != NULL; bv++ )
1918 {
1919 if ( ! access_allowed( op, e,
1920 mlist->sml_desc, bv,
1921 ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WADD,
1922 &state ) )
1923 {
1924 ret = 0;
1925 goto done;
1926 }
1927 }
1928 break;
1929
1930 case LDAP_MOD_DELETE:
1931 if ( mlist->sml_values == NULL ) {
1932 if ( ! access_allowed( op, e,
1933 mlist->sml_desc, NULL,
1934 ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WDEL,
1935 NULL ) )
1936 {
1937 ret = 0;
1938 goto done;
1939 }
1940 break;
1941 }
1942 for ( bv = mlist->sml_nvalues
1943 ? mlist->sml_nvalues : mlist->sml_values;
1944 bv->bv_val != NULL; bv++ )
1945 {
1946 if ( ! access_allowed( op, e,
1947 mlist->sml_desc, bv,
1948 ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WDEL,
1949 &state ) )
1950 {
1951 ret = 0;
1952 goto done;
1953 }
1954 }
1955 break;
1956
1957 case SLAP_MOD_SOFTADD:
1958 /* allow adding attribute via modrdn thru */
1959 break;
1960
1961 default:
1962 assert( 0 );
1963 /* not reached */
1964 ret = 0;
1965 break;
1966 }
1967 }
1968
1969 done:
1970 if (be_null) op->o_bd = NULL;
1971 return( ret );
1972 }
1973
1974 int
1975 acl_get_part(
1976 struct berval *list,
1977 int ix,
1978 char sep,
1979 struct berval *bv )
1980 {
1981 int len;
1982 char *p;
1983
1984 if ( bv ) {
1985 BER_BVZERO( bv );
1986 }
1987 len = list->bv_len;
1988 p = list->bv_val;
1989 while ( len >= 0 && --ix >= 0 ) {
1990 while ( --len >= 0 && *p++ != sep )
1991 ;
1992 }
1993 while ( len >= 0 && *p == ' ' ) {
1994 len--;
1995 p++;
1996 }
1997 if ( len < 0 ) {
1998 return -1;
1999 }
2000
2001 if ( !bv ) {
2002 return 0;
2003 }
2004
2005 bv->bv_val = p;
2006 while ( --len >= 0 && *p != sep ) {
2007 bv->bv_len++;
2008 p++;
2009 }
2010 while ( bv->bv_len > 0 && *--p == ' ' ) {
2011 bv->bv_len--;
2012 }
2013
2014 return bv->bv_len;
2015 }
2016
2017 typedef struct acl_set_gather_t {
2018 SetCookie *cookie;
2019 BerVarray bvals;
2020 } acl_set_gather_t;
2021
2022 static int
2023 acl_set_cb_gather( Operation *op, SlapReply *rs )
2024 {
2025 acl_set_gather_t *p = (acl_set_gather_t *)op->o_callback->sc_private;
2026
2027 if ( rs->sr_type == REP_SEARCH ) {
2028 BerValue bvals[ 2 ];
2029 BerVarray bvalsp = NULL;
2030 int j;
2031
2032 for ( j = 0; !BER_BVISNULL( &rs->sr_attrs[ j ].an_name ); j++ ) {
2033 AttributeDescription *desc = rs->sr_attrs[ j ].an_desc;
2034
2035 if ( desc == NULL ) {
2036 continue;
2037 }
2038
2039 if ( desc == slap_schema.si_ad_entryDN ) {
2040 bvalsp = bvals;
2041 bvals[ 0 ] = rs->sr_entry->e_nname;
2042 BER_BVZERO( &bvals[ 1 ] );
2043
2044 } else {
2045 Attribute *a;
2046
2047 a = attr_find( rs->sr_entry->e_attrs, desc );
2048 if ( a != NULL ) {
2049 bvalsp = a->a_nvals;
2050 }
2051 }
2052
2053 if ( bvalsp ) {
2054 p->bvals = slap_set_join( p->cookie, p->bvals,
2055 ( '|' | SLAP_SET_RREF ), bvalsp );
2056 }
2057 }
2058
2059 } else {
2060 assert( rs->sr_type == REP_RESULT );
2061 }
2062
2063 return 0;
2064 }
2065
2066 BerVarray
2067 acl_set_gather( SetCookie *cookie, struct berval *name, AttributeDescription *desc )
2068 {
2069 AclSetCookie *cp = (AclSetCookie *)cookie;
2070 int rc = 0;
2071 LDAPURLDesc *ludp = NULL;
2072 Operation op2 = { 0 };
2073 SlapReply rs = {REP_RESULT};
2074 AttributeName anlist[ 2 ], *anlistp = NULL;
2075 int nattrs = 0;
2076 slap_callback cb = { NULL, acl_set_cb_gather, NULL, NULL };
2077 acl_set_gather_t p = { 0 };
2078
2079 /* this routine needs to return the bervals instead of
2080 * plain strings, since syntax is not known. It should
2081 * also return the syntax or some "comparison cookie".
2082 */
2083 if ( strncasecmp( name->bv_val, "ldap:///", STRLENOF( "ldap:///" ) ) != 0 ) {
2084 return acl_set_gather2( cookie, name, desc );
2085 }
2086
2087 rc = ldap_url_parse( name->bv_val, &ludp );
2088 if ( rc != LDAP_URL_SUCCESS ) {
2089 Debug( LDAP_DEBUG_TRACE,
2090 "%s acl_set_gather: unable to parse URL=\"%s\"\n",
2091 cp->asc_op->o_log_prefix, name->bv_val, 0 );
2092
2093 rc = LDAP_PROTOCOL_ERROR;
2094 goto url_done;
2095 }
2096
2097 if ( ( ludp->lud_host && ludp->lud_host[0] ) || ludp->lud_exts )
2098 {
2099 /* host part must be empty */
2100 /* extensions parts must be empty */
2101 Debug( LDAP_DEBUG_TRACE,
2102 "%s acl_set_gather: host/exts must be absent in URL=\"%s\"\n",
2103 cp->asc_op->o_log_prefix, name->bv_val, 0 );
2104
2105 rc = LDAP_PROTOCOL_ERROR;
2106 goto url_done;
2107 }
2108
2109 /* Grab the searchbase and see if an appropriate database can be found */
2110 ber_str2bv( ludp->lud_dn, 0, 0, &op2.o_req_dn );
2111 rc = dnNormalize( 0, NULL, NULL, &op2.o_req_dn,
2112 &op2.o_req_ndn, cp->asc_op->o_tmpmemctx );
2113 BER_BVZERO( &op2.o_req_dn );
2114 if ( rc != LDAP_SUCCESS ) {
2115 Debug( LDAP_DEBUG_TRACE,
2116 "%s acl_set_gather: DN=\"%s\" normalize failed\n",
2117 cp->asc_op->o_log_prefix, op2.o_req_dn.bv_val, 0 );
2118
2119 goto url_done;
2120 }
2121
2122 op2.o_bd = select_backend( &op2.o_req_ndn, 1 );
2123 if ( ( op2.o_bd == NULL ) || ( op2.o_bd->be_search == NULL ) ) {
2124 Debug( LDAP_DEBUG_TRACE,
2125 "%s acl_set_gather: no database could be selected for DN=\"%s\"\n",
2126 cp->asc_op->o_log_prefix, op2.o_req_ndn.bv_val, 0 );
2127
2128 rc = LDAP_NO_SUCH_OBJECT;
2129 goto url_done;
2130 }
2131
2132 /* Grab the filter */
2133 if ( ludp->lud_filter ) {
2134 ber_str2bv_x( ludp->lud_filter, 0, 0, &op2.ors_filterstr,
2135 cp->asc_op->o_tmpmemctx );
2136 op2.ors_filter = str2filter_x( cp->asc_op, op2.ors_filterstr.bv_val );
2137 if ( op2.ors_filter == NULL ) {
2138 Debug( LDAP_DEBUG_TRACE,
2139 "%s acl_set_gather: unable to parse filter=\"%s\"\n",
2140 cp->asc_op->o_log_prefix, op2.ors_filterstr.bv_val, 0 );
2141
2142 rc = LDAP_PROTOCOL_ERROR;
2143 goto url_done;
2144 }
2145
2146 } else {
2147 op2.ors_filterstr = *slap_filterstr_objectClass_pres;
2148 op2.ors_filter = (Filter *)slap_filter_objectClass_pres;
2149 }
2150
2151
2152 /* Grab the scope */
2153 op2.ors_scope = ludp->lud_scope;
2154
2155 /* Grap the attributes */
2156 if ( ludp->lud_attrs ) {
2157 int i;
2158
2159 for ( ; ludp->lud_attrs[ nattrs ]; nattrs++ )
2160 ;
2161
2162 anlistp = slap_sl_calloc( sizeof( AttributeName ), nattrs + 2,
2163 cp->asc_op->o_tmpmemctx );
2164
2165 for ( i = 0, nattrs = 0; ludp->lud_attrs[ i ]; i++ ) {
2166 struct berval name;
2167 AttributeDescription *desc = NULL;
2168 const char *text = NULL;
2169
2170 ber_str2bv( ludp->lud_attrs[ i ], 0, 0, &name );
2171 rc = slap_bv2ad( &name, &desc, &text );
2172 if ( rc == LDAP_SUCCESS ) {
2173 anlistp[ nattrs ].an_name = name;
2174 anlistp[ nattrs ].an_desc = desc;
2175 nattrs++;
2176 }
2177 }
2178
2179 } else {
2180 anlistp = anlist;
2181 }
2182
2183 anlistp[ nattrs ].an_name = desc->ad_cname;
2184 anlistp[ nattrs ].an_desc = desc;
2185
2186 BER_BVZERO( &anlistp[ nattrs + 1 ].an_name );
2187
2188 p.cookie = cookie;
2189
2190 op2.o_hdr = cp->asc_op->o_hdr;
2191 op2.o_tag = LDAP_REQ_SEARCH;
2192 op2.o_ndn = op2.o_bd->be_rootndn;
2193 op2.o_callback = &cb;
2194 slap_op_time( &op2.o_time, &op2.o_tincr );
2195 op2.o_do_not_cache = 1;
2196 op2.o_is_auth_check = 0;
2197 ber_dupbv_x( &op2.o_req_dn, &op2.o_req_ndn, cp->asc_op->o_tmpmemctx );
2198 op2.ors_slimit = SLAP_NO_LIMIT;
2199 op2.ors_tlimit = SLAP_NO_LIMIT;
2200 op2.ors_attrs = anlistp;
2201 op2.ors_attrsonly = 0;
2202 op2.o_private = cp->asc_op->o_private;
2203 op2.o_extra = cp->asc_op->o_extra;
2204
2205 cb.sc_private = &p;
2206
2207 rc = op2.o_bd->be_search( &op2, &rs );
2208 if ( rc != 0 ) {
2209 goto url_done;
2210 }
2211
2212 url_done:;
2213 if ( op2.ors_filter && op2.ors_filter != slap_filter_objectClass_pres ) {
2214 filter_free_x( cp->asc_op, op2.ors_filter );
2215 }
2216 if ( !BER_BVISNULL( &op2.o_req_ndn ) ) {
2217 slap_sl_free( op2.o_req_ndn.bv_val, cp->asc_op->o_tmpmemctx );
2218 }
2219 if ( !BER_BVISNULL( &op2.o_req_dn ) ) {
2220 slap_sl_free( op2.o_req_dn.bv_val, cp->asc_op->o_tmpmemctx );
2221 }
2222 if ( ludp ) {
2223 ldap_free_urldesc( ludp );
2224 }
2225 if ( anlistp && anlistp != anlist ) {
2226 slap_sl_free( anlistp, cp->asc_op->o_tmpmemctx );
2227 }
2228
2229 return p.bvals;
2230 }
2231
2232 BerVarray
2233 acl_set_gather2( SetCookie *cookie, struct berval *name, AttributeDescription *desc )
2234 {
2235 AclSetCookie *cp = (AclSetCookie *)cookie;
2236 BerVarray bvals = NULL;
2237 struct berval ndn;
2238 int rc = 0;
2239
2240 /* this routine needs to return the bervals instead of
2241 * plain strings, since syntax is not known. It should
2242 * also return the syntax or some "comparison cookie".
2243 */
2244 rc = dnNormalize( 0, NULL, NULL, name, &ndn, cp->asc_op->o_tmpmemctx );
2245 if ( rc == LDAP_SUCCESS ) {
2246 if ( desc == slap_schema.si_ad_entryDN ) {
2247 bvals = (BerVarray)slap_sl_malloc( sizeof( BerValue ) * 2,
2248 cp->asc_op->o_tmpmemctx );
2249 bvals[ 0 ] = ndn;
2250 BER_BVZERO( &bvals[ 1 ] );
2251 BER_BVZERO( &ndn );
2252
2253 } else {
2254 backend_attribute( cp->asc_op,
2255 cp->asc_e, &ndn, desc, &bvals, ACL_NONE );
2256 }
2257
2258 if ( !BER_BVISNULL( &ndn ) ) {
2259 slap_sl_free( ndn.bv_val, cp->asc_op->o_tmpmemctx );
2260 }
2261 }
2262
2263 return bvals;
2264 }
2265
2266 int
2267 acl_match_set (
2268 struct berval *subj,
2269 Operation *op,
2270 Entry *e,
2271 struct berval *default_set_attribute )
2272 {
2273 struct berval set = BER_BVNULL;
2274 int rc = 0;
2275 AclSetCookie cookie;
2276
2277 if ( default_set_attribute == NULL ) {
2278 ber_dupbv_x( &set, subj, op->o_tmpmemctx );
2279
2280 } else {
2281 struct berval subjdn, ndn = BER_BVNULL;
2282 struct berval setat;
2283 BerVarray bvals = NULL;
2284 const char *text;
2285 AttributeDescription *desc = NULL;
2286
2287 /* format of string is "entry/setAttrName" */
2288 if ( acl_get_part( subj, 0, '/', &subjdn ) < 0 ) {
2289 return 0;
2290 }
2291
2292 if ( acl_get_part( subj, 1, '/', &setat ) < 0 ) {
2293 setat = *default_set_attribute;
2294 }
2295
2296 /*
2297 * NOTE: dnNormalize honors the ber_len field
2298 * as the length of the dn to be normalized
2299 */
2300 if ( slap_bv2ad( &setat, &desc, &text ) == LDAP_SUCCESS ) {
2301 if ( dnNormalize( 0, NULL, NULL, &subjdn, &ndn, op->o_tmpmemctx ) == LDAP_SUCCESS )
2302 {
2303 backend_attribute( op, e, &ndn, desc, &bvals, ACL_NONE );
2304 if ( bvals != NULL && !BER_BVISNULL( &bvals[0] ) ) {
2305 int i;
2306
2307 set = bvals[0];
2308 BER_BVZERO( &bvals[0] );
2309 for ( i = 1; !BER_BVISNULL( &bvals[i] ); i++ )
2310 /* count */ ;
2311 bvals[0].bv_val = bvals[i-1].bv_val;
2312 BER_BVZERO( &bvals[i-1] );
2313 }
2314 ber_bvarray_free_x( bvals, op->o_tmpmemctx );
2315 slap_sl_free( ndn.bv_val, op->o_tmpmemctx );
2316 }
2317 }
2318 }
2319
2320 if ( !BER_BVISNULL( &set ) ) {
2321 cookie.asc_op = op;
2322 cookie.asc_e = e;
2323 rc = ( slap_set_filter(
2324 acl_set_gather,
2325 (SetCookie *)&cookie, &set,
2326 &op->o_ndn, &e->e_nname, NULL ) > 0 );
2327 slap_sl_free( set.bv_val, op->o_tmpmemctx );
2328 }
2329
2330 return(rc);
2331 }
2332
2333 #ifdef SLAP_DYNACL
2334
2335 /*
2336 * dynamic ACL infrastructure
2337 */
2338 static slap_dynacl_t *da_list = NULL;
2339
2340 int
2341 slap_dynacl_register( slap_dynacl_t *da )
2342 {
2343 slap_dynacl_t *tmp;
2344
2345 for ( tmp = da_list; tmp; tmp = tmp->da_next ) {
2346 if ( strcasecmp( da->da_name, tmp->da_name ) == 0 ) {
2347 break;
2348 }
2349 }
2350
2351 if ( tmp != NULL ) {
2352 return -1;
2353 }
2354
2355 if ( da->da_mask == NULL ) {
2356 return -1;
2357 }
2358
2359 da->da_private = NULL;
2360 da->da_next = da_list;
2361 da_list = da;
2362
2363 return 0;
2364 }
2365
2366 static slap_dynacl_t *
2367 slap_dynacl_next( slap_dynacl_t *da )
2368 {
2369 if ( da ) {
2370 return da->da_next;
2371 }
2372 return da_list;
2373 }
2374
2375 slap_dynacl_t *
2376 slap_dynacl_get( const char *name )
2377 {
2378 slap_dynacl_t *da;
2379
2380 for ( da = slap_dynacl_next( NULL ); da; da = slap_dynacl_next( da ) ) {
2381 if ( strcasecmp( da->da_name, name ) == 0 ) {
2382 break;
2383 }
2384 }
2385
2386 return da;
2387 }
2388 #endif /* SLAP_DYNACL */
2389
2390 /*
2391 * statically built-in dynamic ACL initialization
2392 */
2393 static int (*acl_init_func[])( void ) = {
2394 #ifdef SLAP_DYNACL
2395 /* TODO: remove when ACI will only be dynamic */
2396 #if SLAPD_ACI_ENABLED == SLAPD_MOD_STATIC
2397 dynacl_aci_init,
2398 #endif /* SLAPD_ACI_ENABLED */
2399 #endif /* SLAP_DYNACL */
2400
2401 NULL
2402 };
2403
2404 int
2405 acl_init( void )
2406 {
2407 int i, rc;
2408
2409 for ( i = 0; acl_init_func[ i ] != NULL; i++ ) {
2410 rc = (*(acl_init_func[ i ]))();
2411 if ( rc != 0 ) {
2412 return rc;
2413 }
2414 }
2415
2416 return 0;
2417 }
2418
2419 int
2420 acl_string_expand(
2421 struct berval *bv,
2422 struct berval *pat,
2423 char *match,
2424 int nmatch,
2425 regmatch_t *matches)
2426 {
2427 ber_len_t size;
2428 char *sp;
2429 char *dp;
2430 int flag;
2431
2432 size = 0;
2433 bv->bv_val[0] = '\0';
2434 bv->bv_len--; /* leave space for lone $ */
2435
2436 flag = 0;
2437 for ( dp = bv->bv_val, sp = pat->bv_val; size < bv->bv_len &&
2438 sp < pat->bv_val + pat->bv_len ; sp++ )
2439 {
2440 /* did we previously see a $ */
2441 if ( flag ) {
2442 if ( flag == 1 && *sp == '$' ) {
2443 *dp++ = '$';
2444 size++;
2445 flag = 0;
2446
2447 } else if ( flag == 1 && *sp == '{' /*'}'*/) {
2448 flag = 2;
2449
2450 } else if ( *sp >= '0' && *sp <= '9' ) {
2451 int n;
2452 int i;
2453 int l;
2454
2455 n = *sp - '0';
2456
2457 if ( flag == 2 ) {
2458 for ( sp++; *sp != '\0' && *sp != /*'{'*/ '}'; sp++ ) {
2459 if ( *sp >= '0' && *sp <= '9' ) {
2460 n = 10*n + ( *sp - '0' );
2461 }
2462 }
2463
2464 if ( *sp != /*'{'*/ '}' ) {
2465 /* FIXME: error */
2466 return 1;
2467 }
2468 }
2469
2470 if ( n >= nmatch ) {
2471 /* FIXME: error */
2472 return 1;
2473 }
2474
2475 *dp = '\0';
2476 i = matches[n].rm_so;
2477 l = matches[n].rm_eo;
2478 for ( ; size < bv->bv_len && i < l; size++, i++ ) {
2479 *dp++ = match[i];
2480 }
2481 *dp = '\0';
2482
2483 flag = 0;
2484 }
2485 } else {
2486 if (*sp == '$') {
2487 flag = 1;
2488 } else {
2489 *dp++ = *sp;
2490 size++;
2491 }
2492 }
2493 }
2494
2495 if ( flag ) {
2496 /* must have ended with a single $ */
2497 *dp++ = '$';
2498 size++;
2499 }
2500
2501 *dp = '\0';
2502 bv->bv_len = size;
2503
2504 Debug( LDAP_DEBUG_TRACE, "=> acl_string_expand: pattern: %.*s\n", (int)pat->bv_len, pat->bv_val, 0 );
2505 Debug( LDAP_DEBUG_TRACE, "=> acl_string_expand: expanded: %s\n", bv->bv_val, 0, 0 );
2506
2507 return 0;
2508 }
2509
2510 static int
2511 regex_matches(
2512 struct berval *pat, /* pattern to expand and match against */
2513 char *str, /* string to match against pattern */
2514 char *buf, /* buffer with $N expansion variables */
2515 int nmatch, /* size of the matches array */
2516 regmatch_t *matches /* offsets in buffer for $N expansion variables */
2517 )
2518 {
2519 regex_t re;
2520 char newbuf[ACL_BUF_SIZE];
2521 struct berval bv;
2522 int rc;
2523
2524 bv.bv_len = sizeof( newbuf ) - 1;
2525 bv.bv_val = newbuf;
2526
2527 if (str == NULL) {
2528 str = "";
2529 };
2530
2531 acl_string_expand( &bv, pat, buf, nmatch, matches );
2532 rc = regcomp( &re, newbuf, REG_EXTENDED|REG_ICASE );
2533 if ( rc ) {
2534 char error[ACL_BUF_SIZE];
2535 regerror( rc, &re, error, sizeof( error ) );
2536
2537 Debug( LDAP_DEBUG_TRACE,
2538 "compile( \"%s\", \"%s\") failed %s\n",
2539 pat->bv_val, str, error );
2540 return( 0 );
2541 }
2542
2543 rc = regexec( &re, str, 0, NULL, 0 );
2544 regfree( &re );
2545
2546 Debug( LDAP_DEBUG_TRACE,
2547 "=> regex_matches: string: %s\n", str, 0, 0 );
2548 Debug( LDAP_DEBUG_TRACE,
2549 "=> regex_matches: rc: %d %s\n",
2550 rc, !rc ? "matches" : "no matches", 0 );
2551 return( !rc );
2552 }
2553
NetBSD on the FriendlyARM MINI2440