Fix for CVE-2009-2906.
[Samba.git] / source3 / groupdb / mapping.c
blob4f05d732f14b41cae3f6d8b3c96a4f0382c6f18c
1 /*
2 * Unix SMB/CIFS implementation.
3 * RPC Pipe client / server routines
4 * Copyright (C) Andrew Tridgell 1992-2000,
5 * Copyright (C) Jean François Micouleau 1998-2001.
6 * Copyright (C) Volker Lendecke 2006.
7 * Copyright (C) Gerald Carter 2006.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 3 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, see <http://www.gnu.org/licenses/>.
23 #include "includes.h"
24 #include "groupdb/mapping.h"
26 static const struct mapping_backend *backend;
29 initialise a group mapping backend
31 static bool init_group_mapping(void)
33 const char *backend_string;
35 if (backend != NULL) {
36 /* already initialised */
37 return True;
41 * default to using the ldb backend. This parameter should
42 * disappear in future versions of Samba3.
44 * But it's needed for cluster setups, because it's
45 * not yet possible to distribute a ldb inside a cluster.
47 backend_string = lp_parm_const_string(-1, "groupdb", "backend", "ldb");
49 if (strcmp(backend_string, "ldb") == 0) {
50 backend = groupdb_ldb_init();
51 } else if (strcmp(backend_string, "tdb") == 0) {
52 backend = groupdb_tdb_init();
53 } else {
54 DEBUG(0,("Unknown groupdb backend '%s'\n", backend_string));
55 smb_panic("Unknown groupdb backend");
58 return backend != NULL;
61 /****************************************************************************
62 initialise first time the mapping list
63 ****************************************************************************/
64 NTSTATUS add_initial_entry(gid_t gid, const char *sid, enum lsa_SidType sid_name_use, const char *nt_name, const char *comment)
66 GROUP_MAP map;
68 if(!init_group_mapping()) {
69 DEBUG(0,("failed to initialize group mapping\n"));
70 return NT_STATUS_UNSUCCESSFUL;
73 map.gid=gid;
74 if (!string_to_sid(&map.sid, sid)) {
75 DEBUG(0, ("string_to_sid failed: %s", sid));
76 return NT_STATUS_UNSUCCESSFUL;
79 map.sid_name_use=sid_name_use;
80 fstrcpy(map.nt_name, nt_name);
81 fstrcpy(map.comment, comment);
83 return pdb_add_group_mapping_entry(&map);
86 static NTSTATUS alias_memberships(const DOM_SID *members, size_t num_members,
87 DOM_SID **sids, size_t *num)
89 size_t i;
91 *num = 0;
92 *sids = NULL;
94 for (i=0; i<num_members; i++) {
95 NTSTATUS status = backend->one_alias_membership(&members[i], sids, num);
96 if (!NT_STATUS_IS_OK(status))
97 return status;
99 return NT_STATUS_OK;
102 struct aliasmem_closure {
103 const DOM_SID *alias;
104 DOM_SID **sids;
105 size_t *num;
112 * High level functions
113 * better to use them than the lower ones.
115 * we are checking if the group is in the mapping file
116 * and if the group is an existing unix group
120 /* get a domain group from it's SID */
122 bool get_domain_group_from_sid(DOM_SID sid, GROUP_MAP *map)
124 struct group *grp;
125 bool ret;
127 if(!init_group_mapping()) {
128 DEBUG(0,("failed to initialize group mapping\n"));
129 return(False);
132 DEBUG(10, ("get_domain_group_from_sid\n"));
134 /* if the group is NOT in the database, it CAN NOT be a domain group */
136 become_root();
137 ret = pdb_getgrsid(map, sid);
138 unbecome_root();
140 /* special case check for rid 513 */
142 if ( !ret ) {
143 uint32 rid;
145 sid_peek_rid( &sid, &rid );
147 if ( rid == DOMAIN_GROUP_RID_USERS ) {
148 fstrcpy( map->nt_name, "None" );
149 fstrcpy( map->comment, "Ordinary Users" );
150 sid_copy( &map->sid, &sid );
151 map->sid_name_use = SID_NAME_DOM_GRP;
152 map->gid = (gid_t)-1;
154 return True;
157 return False;
160 DEBUG(10, ("get_domain_group_from_sid: SID found in the TDB\n"));
162 /* if it's not a domain group, continue */
163 if (map->sid_name_use!=SID_NAME_DOM_GRP) {
164 return False;
167 DEBUG(10, ("get_domain_group_from_sid: SID is a domain group\n"));
169 if (map->gid==-1) {
170 return False;
173 DEBUG(10, ("get_domain_group_from_sid: SID is mapped to gid:%lu\n",(unsigned long)map->gid));
175 grp = getgrgid(map->gid);
176 if ( !grp ) {
177 DEBUG(10, ("get_domain_group_from_sid: gid DOESN'T exist in UNIX security\n"));
178 return False;
181 DEBUG(10, ("get_domain_group_from_sid: gid exists in UNIX security\n"));
183 return True;
186 /****************************************************************************
187 Create a UNIX group on demand.
188 ****************************************************************************/
190 int smb_create_group(const char *unix_group, gid_t *new_gid)
192 char *add_script = NULL;
193 int ret = -1;
194 int fd = 0;
196 *new_gid = 0;
198 /* defer to scripts */
200 if ( *lp_addgroup_script() ) {
201 TALLOC_CTX *ctx = talloc_tos();
203 add_script = talloc_strdup(ctx,
204 lp_addgroup_script());
205 if (!add_script) {
206 return -1;
208 add_script = talloc_string_sub(ctx,
209 add_script, "%g", unix_group);
210 if (!add_script) {
211 return -1;
214 ret = smbrun(add_script, &fd);
215 DEBUG(ret ? 0 : 3,("smb_create_group: Running the command `%s' gave %d\n",add_script,ret));
216 if (ret == 0) {
217 smb_nscd_flush_group_cache();
219 if (ret != 0)
220 return ret;
222 if (fd != 0) {
223 fstring output;
225 *new_gid = 0;
226 if (read(fd, output, sizeof(output)) > 0) {
227 *new_gid = (gid_t)strtoul(output, NULL, 10);
230 close(fd);
235 if (*new_gid == 0) {
236 struct group *grp = getgrnam(unix_group);
238 if (grp != NULL)
239 *new_gid = grp->gr_gid;
242 return ret;
245 /****************************************************************************
246 Delete a UNIX group on demand.
247 ****************************************************************************/
249 int smb_delete_group(const char *unix_group)
251 char *del_script = NULL;
252 int ret = -1;
254 /* defer to scripts */
256 if ( *lp_delgroup_script() ) {
257 TALLOC_CTX *ctx = talloc_tos();
259 del_script = talloc_strdup(ctx,
260 lp_delgroup_script());
261 if (!del_script) {
262 return -1;
264 del_script = talloc_string_sub(ctx,
265 del_script, "%g", unix_group);
266 if (!del_script) {
267 return -1;
269 ret = smbrun(del_script,NULL);
270 DEBUG(ret ? 0 : 3,("smb_delete_group: Running the command `%s' gave %d\n",del_script,ret));
271 if (ret == 0) {
272 smb_nscd_flush_group_cache();
274 return ret;
277 return -1;
280 /****************************************************************************
281 Set a user's primary UNIX group.
282 ****************************************************************************/
284 int smb_set_primary_group(const char *unix_group, const char* unix_user)
286 char *add_script = NULL;
287 int ret = -1;
289 /* defer to scripts */
291 if ( *lp_setprimarygroup_script() ) {
292 TALLOC_CTX *ctx = talloc_tos();
294 add_script = talloc_strdup(ctx,
295 lp_setprimarygroup_script());
296 if (!add_script) {
297 return -1;
299 add_script = talloc_all_string_sub(ctx,
300 add_script, "%g", unix_group);
301 if (!add_script) {
302 return -1;
304 add_script = talloc_string_sub(ctx,
305 add_script, "%u", unix_user);
306 if (!add_script) {
307 return -1;
309 ret = smbrun(add_script,NULL);
310 flush_pwnam_cache();
311 DEBUG(ret ? 0 : 3,("smb_set_primary_group: "
312 "Running the command `%s' gave %d\n",add_script,ret));
313 if (ret == 0) {
314 smb_nscd_flush_group_cache();
316 return ret;
319 return -1;
322 /****************************************************************************
323 Add a user to a UNIX group.
324 ****************************************************************************/
326 int smb_add_user_group(const char *unix_group, const char *unix_user)
328 char *add_script = NULL;
329 int ret = -1;
331 /* defer to scripts */
333 if ( *lp_addusertogroup_script() ) {
334 TALLOC_CTX *ctx = talloc_tos();
336 add_script = talloc_strdup(ctx,
337 lp_addusertogroup_script());
338 if (!add_script) {
339 return -1;
341 add_script = talloc_string_sub(ctx,
342 add_script, "%g", unix_group);
343 if (!add_script) {
344 return -1;
346 add_script = talloc_string_sub(ctx,
347 add_script, "%u", unix_user);
348 if (!add_script) {
349 return -1;
351 ret = smbrun(add_script,NULL);
352 DEBUG(ret ? 0 : 3,("smb_add_user_group: Running the command `%s' gave %d\n",add_script,ret));
353 if (ret == 0) {
354 smb_nscd_flush_group_cache();
356 return ret;
359 return -1;
362 /****************************************************************************
363 Delete a user from a UNIX group
364 ****************************************************************************/
366 int smb_delete_user_group(const char *unix_group, const char *unix_user)
368 char *del_script = NULL;
369 int ret = -1;
371 /* defer to scripts */
373 if ( *lp_deluserfromgroup_script() ) {
374 TALLOC_CTX *ctx = talloc_tos();
376 del_script = talloc_strdup(ctx,
377 lp_deluserfromgroup_script());
378 if (!del_script) {
379 return -1;
381 del_script = talloc_string_sub(ctx,
382 del_script, "%g", unix_group);
383 if (!del_script) {
384 return -1;
386 del_script = talloc_string_sub(ctx,
387 del_script, "%u", unix_user);
388 if (!del_script) {
389 return -1;
391 ret = smbrun(del_script,NULL);
392 DEBUG(ret ? 0 : 3,("smb_delete_user_group: Running the command `%s' gave %d\n",del_script,ret));
393 if (ret == 0) {
394 smb_nscd_flush_group_cache();
396 return ret;
399 return -1;
403 NTSTATUS pdb_default_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
404 DOM_SID sid)
406 if (!init_group_mapping()) {
407 DEBUG(0,("failed to initialize group mapping\n"));
408 return NT_STATUS_UNSUCCESSFUL;
410 return backend->get_group_map_from_sid(sid, map) ?
411 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
414 NTSTATUS pdb_default_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
415 gid_t gid)
417 if (!init_group_mapping()) {
418 DEBUG(0,("failed to initialize group mapping\n"));
419 return NT_STATUS_UNSUCCESSFUL;
421 return backend->get_group_map_from_gid(gid, map) ?
422 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
425 NTSTATUS pdb_default_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
426 const char *name)
428 if (!init_group_mapping()) {
429 DEBUG(0,("failed to initialize group mapping\n"));
430 return NT_STATUS_UNSUCCESSFUL;
432 return backend->get_group_map_from_ntname(name, map) ?
433 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
436 NTSTATUS pdb_default_add_group_mapping_entry(struct pdb_methods *methods,
437 GROUP_MAP *map)
439 if (!init_group_mapping()) {
440 DEBUG(0,("failed to initialize group mapping\n"));
441 return NT_STATUS_UNSUCCESSFUL;
443 return backend->add_mapping_entry(map, TDB_INSERT) ?
444 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
447 NTSTATUS pdb_default_update_group_mapping_entry(struct pdb_methods *methods,
448 GROUP_MAP *map)
450 if (!init_group_mapping()) {
451 DEBUG(0,("failed to initialize group mapping\n"));
452 return NT_STATUS_UNSUCCESSFUL;
454 return backend->add_mapping_entry(map, TDB_REPLACE) ?
455 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
458 NTSTATUS pdb_default_delete_group_mapping_entry(struct pdb_methods *methods,
459 DOM_SID sid)
461 if (!init_group_mapping()) {
462 DEBUG(0,("failed to initialize group mapping\n"));
463 return NT_STATUS_UNSUCCESSFUL;
465 return backend->group_map_remove(&sid) ?
466 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
469 NTSTATUS pdb_default_enum_group_mapping(struct pdb_methods *methods,
470 const DOM_SID *sid, enum lsa_SidType sid_name_use,
471 GROUP_MAP **pp_rmap, size_t *p_num_entries,
472 bool unix_only)
474 if (!init_group_mapping()) {
475 DEBUG(0,("failed to initialize group mapping\n"));
476 return NT_STATUS_UNSUCCESSFUL;
478 return backend->enum_group_mapping(sid, sid_name_use, pp_rmap, p_num_entries, unix_only) ?
479 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
482 NTSTATUS pdb_default_create_alias(struct pdb_methods *methods,
483 const char *name, uint32 *rid)
485 DOM_SID sid;
486 enum lsa_SidType type;
487 uint32 new_rid;
488 gid_t gid;
489 bool exists;
490 GROUP_MAP map;
491 TALLOC_CTX *mem_ctx;
492 NTSTATUS status;
494 DEBUG(10, ("Trying to create alias %s\n", name));
496 mem_ctx = talloc_new(NULL);
497 if (mem_ctx == NULL) {
498 return NT_STATUS_NO_MEMORY;
501 exists = lookup_name(mem_ctx, name, LOOKUP_NAME_LOCAL,
502 NULL, NULL, &sid, &type);
503 TALLOC_FREE(mem_ctx);
505 if (exists) {
506 return NT_STATUS_ALIAS_EXISTS;
509 if (!winbind_allocate_gid(&gid)) {
510 DEBUG(3, ("Could not get a gid out of winbind\n"));
511 return NT_STATUS_ACCESS_DENIED;
514 if (!pdb_new_rid(&new_rid)) {
515 DEBUG(0, ("Could not allocate a RID -- wasted a gid :-(\n"));
516 return NT_STATUS_ACCESS_DENIED;
519 DEBUG(10, ("Creating alias %s with gid %u and rid %u\n",
520 name, (unsigned int)gid, (unsigned int)new_rid));
522 sid_copy(&sid, get_global_sam_sid());
523 sid_append_rid(&sid, new_rid);
525 map.gid = gid;
526 sid_copy(&map.sid, &sid);
527 map.sid_name_use = SID_NAME_ALIAS;
528 fstrcpy(map.nt_name, name);
529 fstrcpy(map.comment, "");
531 status = pdb_add_group_mapping_entry(&map);
533 if (!NT_STATUS_IS_OK(status)) {
534 DEBUG(0, ("Could not add group mapping entry for alias %s "
535 "(%s)\n", name, nt_errstr(status)));
536 return status;
539 *rid = new_rid;
541 return NT_STATUS_OK;
544 NTSTATUS pdb_default_delete_alias(struct pdb_methods *methods,
545 const DOM_SID *sid)
547 return pdb_delete_group_mapping_entry(*sid);
550 NTSTATUS pdb_default_get_aliasinfo(struct pdb_methods *methods,
551 const DOM_SID *sid,
552 struct acct_info *info)
554 GROUP_MAP map;
556 if (!pdb_getgrsid(&map, *sid))
557 return NT_STATUS_NO_SUCH_ALIAS;
559 if ((map.sid_name_use != SID_NAME_ALIAS) &&
560 (map.sid_name_use != SID_NAME_WKN_GRP)) {
561 DEBUG(2, ("%s is a %s, expected an alias\n",
562 sid_string_dbg(sid),
563 sid_type_lookup(map.sid_name_use)));
564 return NT_STATUS_NO_SUCH_ALIAS;
567 fstrcpy(info->acct_name, map.nt_name);
568 fstrcpy(info->acct_desc, map.comment);
569 sid_peek_rid(&map.sid, &info->rid);
570 return NT_STATUS_OK;
573 NTSTATUS pdb_default_set_aliasinfo(struct pdb_methods *methods,
574 const DOM_SID *sid,
575 struct acct_info *info)
577 GROUP_MAP map;
579 if (!pdb_getgrsid(&map, *sid))
580 return NT_STATUS_NO_SUCH_ALIAS;
582 fstrcpy(map.nt_name, info->acct_name);
583 fstrcpy(map.comment, info->acct_desc);
585 return pdb_update_group_mapping_entry(&map);
588 NTSTATUS pdb_default_add_aliasmem(struct pdb_methods *methods,
589 const DOM_SID *alias, const DOM_SID *member)
591 if (!init_group_mapping()) {
592 DEBUG(0,("failed to initialize group mapping\n"));
593 return NT_STATUS_UNSUCCESSFUL;
595 return backend->add_aliasmem(alias, member);
598 NTSTATUS pdb_default_del_aliasmem(struct pdb_methods *methods,
599 const DOM_SID *alias, const DOM_SID *member)
601 if (!init_group_mapping()) {
602 DEBUG(0,("failed to initialize group mapping\n"));
603 return NT_STATUS_UNSUCCESSFUL;
605 return backend->del_aliasmem(alias, member);
608 NTSTATUS pdb_default_enum_aliasmem(struct pdb_methods *methods,
609 const DOM_SID *alias, DOM_SID **pp_members,
610 size_t *p_num_members)
612 if (!init_group_mapping()) {
613 DEBUG(0,("failed to initialize group mapping\n"));
614 return NT_STATUS_UNSUCCESSFUL;
616 return backend->enum_aliasmem(alias, pp_members, p_num_members);
619 NTSTATUS pdb_default_alias_memberships(struct pdb_methods *methods,
620 TALLOC_CTX *mem_ctx,
621 const DOM_SID *domain_sid,
622 const DOM_SID *members,
623 size_t num_members,
624 uint32 **pp_alias_rids,
625 size_t *p_num_alias_rids)
627 DOM_SID *alias_sids;
628 size_t i, num_alias_sids;
629 NTSTATUS result;
631 if (!init_group_mapping()) {
632 DEBUG(0,("failed to initialize group mapping\n"));
633 return NT_STATUS_UNSUCCESSFUL;
636 alias_sids = NULL;
637 num_alias_sids = 0;
639 result = alias_memberships(members, num_members,
640 &alias_sids, &num_alias_sids);
642 if (!NT_STATUS_IS_OK(result))
643 return result;
645 *p_num_alias_rids = 0;
647 if (num_alias_sids == 0) {
648 TALLOC_FREE(alias_sids);
649 return NT_STATUS_OK;
652 *pp_alias_rids = TALLOC_ARRAY(mem_ctx, uint32, num_alias_sids);
653 if (*pp_alias_rids == NULL)
654 return NT_STATUS_NO_MEMORY;
656 for (i=0; i<num_alias_sids; i++) {
657 if (!sid_peek_check_rid(domain_sid, &alias_sids[i],
658 &(*pp_alias_rids)[*p_num_alias_rids]))
659 continue;
660 *p_num_alias_rids += 1;
663 TALLOC_FREE(alias_sids);
665 return NT_STATUS_OK;
668 /**********************************************************************
669 no ops for passdb backends that don't implement group mapping
670 *********************************************************************/
672 NTSTATUS pdb_nop_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
673 DOM_SID sid)
675 return NT_STATUS_UNSUCCESSFUL;
678 NTSTATUS pdb_nop_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
679 gid_t gid)
681 return NT_STATUS_UNSUCCESSFUL;
684 NTSTATUS pdb_nop_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
685 const char *name)
687 return NT_STATUS_UNSUCCESSFUL;
690 NTSTATUS pdb_nop_add_group_mapping_entry(struct pdb_methods *methods,
691 GROUP_MAP *map)
693 return NT_STATUS_UNSUCCESSFUL;
696 NTSTATUS pdb_nop_update_group_mapping_entry(struct pdb_methods *methods,
697 GROUP_MAP *map)
699 return NT_STATUS_UNSUCCESSFUL;
702 NTSTATUS pdb_nop_delete_group_mapping_entry(struct pdb_methods *methods,
703 DOM_SID sid)
705 return NT_STATUS_UNSUCCESSFUL;
708 NTSTATUS pdb_nop_enum_group_mapping(struct pdb_methods *methods,
709 enum lsa_SidType sid_name_use,
710 GROUP_MAP **rmap, size_t *num_entries,
711 bool unix_only)
713 return NT_STATUS_UNSUCCESSFUL;
716 /****************************************************************************
717 These need to be redirected through pdb_interface.c
718 ****************************************************************************/
719 bool pdb_get_dom_grp_info(const DOM_SID *sid, struct acct_info *info)
721 GROUP_MAP map;
722 bool res;
724 become_root();
725 res = get_domain_group_from_sid(*sid, &map);
726 unbecome_root();
728 if (!res)
729 return False;
731 fstrcpy(info->acct_name, map.nt_name);
732 fstrcpy(info->acct_desc, map.comment);
733 sid_peek_rid(sid, &info->rid);
734 return True;
737 bool pdb_set_dom_grp_info(const DOM_SID *sid, const struct acct_info *info)
739 GROUP_MAP map;
741 if (!get_domain_group_from_sid(*sid, &map))
742 return False;
744 fstrcpy(map.nt_name, info->acct_name);
745 fstrcpy(map.comment, info->acct_desc);
747 return NT_STATUS_IS_OK(pdb_update_group_mapping_entry(&map));
750 /********************************************************************
751 Really just intended to be called by smbd
752 ********************************************************************/
754 NTSTATUS pdb_create_builtin_alias(uint32 rid)
756 DOM_SID sid;
757 enum lsa_SidType type;
758 gid_t gid;
759 GROUP_MAP map;
760 TALLOC_CTX *mem_ctx;
761 NTSTATUS status;
762 const char *name = NULL;
763 fstring groupname;
765 DEBUG(10, ("Trying to create builtin alias %d\n", rid));
767 if ( !sid_compose( &sid, &global_sid_Builtin, rid ) ) {
768 return NT_STATUS_NO_SUCH_ALIAS;
771 if ( (mem_ctx = talloc_new(NULL)) == NULL ) {
772 return NT_STATUS_NO_MEMORY;
775 if ( !lookup_sid(mem_ctx, &sid, NULL, &name, &type) ) {
776 TALLOC_FREE( mem_ctx );
777 return NT_STATUS_NO_SUCH_ALIAS;
780 /* validate RID so copy the name and move on */
782 fstrcpy( groupname, name );
783 TALLOC_FREE( mem_ctx );
785 if (!winbind_allocate_gid(&gid)) {
786 DEBUG(3, ("pdb_create_builtin_alias: Could not get a gid out of winbind\n"));
787 return NT_STATUS_ACCESS_DENIED;
790 DEBUG(10,("Creating alias %s with gid %u\n", groupname, (unsigned int)gid));
792 map.gid = gid;
793 sid_copy(&map.sid, &sid);
794 map.sid_name_use = SID_NAME_ALIAS;
795 fstrcpy(map.nt_name, groupname);
796 fstrcpy(map.comment, "");
798 status = pdb_add_group_mapping_entry(&map);
800 if (!NT_STATUS_IS_OK(status)) {
801 DEBUG(0, ("pdb_create_builtin_alias: Could not add group mapping entry for alias %d "
802 "(%s)\n", rid, nt_errstr(status)));
805 return status;