2 * Unix SMB/CIFS implementation.
4 * group mapping code on top of ldb
6 * Copyright (C) Andrew Tridgell 2006
8 * based on tdb group mapping code from groupdb/mapping.c
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "groupdb/mapping.h"
27 #include "lib/ldb/include/includes.h"
28 #include "lib/ldb/include/ldb_errors.h"
30 static struct ldb_context *ldb;
32 static BOOL mapping_upgrade(const char *tdb_path);
35 connect to the group mapping ldb
37 BOOL init_group_mapping(void)
40 const char *init_ldif[] =
41 { "dn: @ATTRIBUTES\n" \
42 "ntName: CASE_INSENSITIVE\n" \
45 "@IDXATTR: gidNumber\n" \
46 "@IDXATTR: ntName\n" \
47 "@IDXATTR: memberOf\n" };
48 const char *db_path, *tdb_path;
56 /* this is needed as Samba3 doesn't have this globally yet */
59 db_path = lock_path("group_mapping.ldb");
62 if (ldb == NULL) goto failed;
64 existed = file_exist(db_path, NULL);
66 if (lp_parm_bool(-1, "groupmap", "nosync", False)) {
67 flags |= LDB_FLG_NOSYNC;
70 ret = ldb_connect(ldb, db_path, flags, NULL);
71 if (ret != LDB_SUCCESS) {
76 /* initialise the ldb with an index */
77 struct ldb_ldif *ldif;
79 for (i=0;i<ARRAY_SIZE(init_ldif);i++) {
80 ldif = ldb_ldif_read_string(ldb, &init_ldif[i]);
81 if (ldif == NULL) goto failed;
82 ret = ldb_add(ldb, ldif->msg);
84 if (ret == -1) goto failed;
88 /* possibly upgrade */
89 tdb_path = lock_path("group_mapping.tdb");
90 if (file_exist(tdb_path, NULL) && !mapping_upgrade(tdb_path)) {
91 unlink(lock_path("group_mapping.ldb"));
98 DEBUG(0,("Failed to open group mapping ldb '%s' - '%s'\n",
99 db_path, ldb?ldb_errstring(ldb):strerror(errno)));
107 form the DN for a mapping entry from a SID
109 static struct ldb_dn *mapping_dn(TALLOC_CTX *mem_ctx, const DOM_SID *sid)
115 sid_copy(&domsid, sid);
116 if (!sid_split_rid(&domsid, &rid)) {
119 if (!sid_to_string(string_sid, &domsid)) {
122 /* we split by domain and rid so we can do a subtree search
123 when we only want one domain */
124 return ldb_dn_string_compose(mem_ctx, NULL, "domain=%s,rid=%u",
129 add a group mapping entry
131 BOOL add_mapping_entry(GROUP_MAP *map, int flag)
133 struct ldb_message *msg;
137 if (!init_group_mapping()) {
141 msg = ldb_msg_new(ldb);
142 if (msg == NULL) return False;
144 msg->dn = mapping_dn(msg, &map->sid);
145 if (msg->dn == NULL) goto failed;
147 if (ldb_msg_add_string(msg, "objectClass", "groupMap") != LDB_SUCCESS ||
148 ldb_msg_add_string(msg, "sid",
149 sid_to_string(string_sid, &map->sid)) != LDB_SUCCESS ||
150 ldb_msg_add_fmt(msg, "gidNumber", "%u", (unsigned)map->gid) != LDB_SUCCESS ||
151 ldb_msg_add_fmt(msg, "sidNameUse", "%u", (unsigned)map->sid_name_use) != LDB_SUCCESS ||
152 ldb_msg_add_string(msg, "ntName", map->nt_name) != LDB_SUCCESS) {
156 if ((map->comment[0] != '\0') &&
157 (ldb_msg_add_string(msg, "ntName", map->nt_name) != LDB_SUCCESS)) {
161 ret = ldb_add(ldb, msg);
163 /* if it exists we update it. This is a hangover from the semantics the
165 if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
166 for (i=0;i<msg->num_elements;i++) {
167 msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
169 ret = ldb_modify(ldb, msg);
174 return ret == LDB_SUCCESS;
182 unpack a ldb message into a GROUP_MAP structure
184 static BOOL msg_to_group_map(struct ldb_message *msg, GROUP_MAP *map)
188 map->gid = ldb_msg_find_attr_as_int(msg, "gidNumber", -1);
189 map->sid_name_use = ldb_msg_find_attr_as_int(msg, "sidNameUse", -1);
190 fstrcpy(map->nt_name, ldb_msg_find_attr_as_string(msg, "ntName", NULL));
191 fstrcpy(map->comment, ldb_msg_find_attr_as_string(msg, "comment", NULL));
192 sidstr = ldb_msg_find_attr_as_string(msg, "sid", NULL);
194 if (!string_to_sid(&map->sid, sidstr) ||
195 map->gid == (gid_t)-1 ||
196 map->sid_name_use == (enum lsa_SidType)-1) {
197 DEBUG(0,("Unable to unpack group mapping\n"));
205 return a group map entry for a given sid
207 BOOL get_group_map_from_sid(DOM_SID sid, GROUP_MAP *map)
211 struct ldb_result *res=NULL;
213 if (!init_group_mapping()) {
217 dn = mapping_dn(ldb, &sid);
218 if (dn == NULL) goto failed;
220 ret = ldb_search(ldb, dn, LDB_SCOPE_BASE, NULL, NULL, &res);
221 talloc_steal(dn, res);
222 if (ret != LDB_SUCCESS || res->count != 1) {
226 if (!msg_to_group_map(res->msgs[0], map)) goto failed;
237 return a group map entry for a given gid
239 BOOL get_group_map_from_gid(gid_t gid, GROUP_MAP *map)
243 struct ldb_result *res=NULL;
245 if (!init_group_mapping()) {
249 expr = talloc_asprintf(ldb, "(&(gidNumber=%u)(objectClass=groupMap))",
251 if (expr == NULL) goto failed;
253 ret = ldb_search(ldb, NULL, LDB_SCOPE_SUBTREE, expr, NULL, &res);
254 talloc_steal(expr, res);
255 if (ret != LDB_SUCCESS || res->count != 1) goto failed;
257 if (!msg_to_group_map(res->msgs[0], map)) goto failed;
268 Return the sid and the type of the unix group.
270 BOOL get_group_map_from_ntname(const char *name, GROUP_MAP *map)
274 struct ldb_result *res=NULL;
276 if (!init_group_mapping()) {
280 expr = talloc_asprintf(ldb, "(&(ntName=%s)(objectClass=groupMap))", name);
281 if (expr == NULL) goto failed;
283 ret = ldb_search(ldb, NULL, LDB_SCOPE_SUBTREE, expr, NULL, &res);
284 talloc_steal(expr, res);
285 if (ret != LDB_SUCCESS || res->count != 1) goto failed;
287 if (!msg_to_group_map(res->msgs[0], map)) goto failed;
298 Remove a group mapping entry.
300 BOOL group_map_remove(const DOM_SID *sid)
305 if (!init_group_mapping()) {
309 dn = mapping_dn(ldb, sid);
310 ret = ldb_delete(ldb, dn);
313 return ret == LDB_SUCCESS;
318 Enumerate the group mappings for a domain
320 BOOL enum_group_mapping(const DOM_SID *domsid, enum lsa_SidType sid_name_use,
322 size_t *p_num_entries, BOOL unix_only)
327 struct ldb_result *res;
328 struct ldb_dn *basedn=NULL;
331 if (!init_group_mapping()) {
335 tmp_ctx = talloc_new(ldb);
336 if (tmp_ctx == NULL) goto failed;
338 if (sid_name_use == SID_NAME_UNKNOWN) {
339 expr = talloc_asprintf(tmp_ctx, "(&(objectClass=groupMap))");
341 expr = talloc_asprintf(tmp_ctx, "(&(sidNameUse=%u)(objectClass=groupMap))",
344 if (expr == NULL) goto failed;
346 /* we do a subtree search on the domain */
347 if (domsid != NULL) {
348 sid_to_string(name, domsid);
349 basedn = ldb_dn_string_compose(tmp_ctx, NULL, "domain=%s", name);
350 if (basedn == NULL) goto failed;
353 ret = ldb_search(ldb, basedn, LDB_SCOPE_SUBTREE, expr, NULL, &res);
354 if (ret != LDB_SUCCESS) goto failed;
359 for (i=0;i<res->count;i++) {
360 (*pp_rmap) = SMB_REALLOC_ARRAY((*pp_rmap), GROUP_MAP,
362 if (!(*pp_rmap)) goto failed;
364 if (!msg_to_group_map(res->msgs[i], &(*pp_rmap)[*p_num_entries])) {
371 talloc_free(tmp_ctx);
375 talloc_free(tmp_ctx);
380 This operation happens on session setup, so it should better be fast. We
381 store a list of aliases a SID is member of hanging off MEMBEROF/SID.
383 NTSTATUS one_alias_membership(const DOM_SID *member,
384 DOM_SID **sids, size_t *num)
386 const char *attrs[] = {
393 struct ldb_result *res=NULL;
395 NTSTATUS status = NT_STATUS_INTERNAL_DB_CORRUPTION;
397 if (!init_group_mapping()) {
398 return NT_STATUS_ACCESS_DENIED;
404 if (!sid_to_string(string_sid, member)) {
405 return NT_STATUS_INVALID_PARAMETER;
408 expr = talloc_asprintf(ldb, "(&(memberOf=%s)(objectClass=groupMap))",
410 if (expr == NULL) goto failed;
412 ret = ldb_search(ldb, NULL, LDB_SCOPE_SUBTREE, expr, attrs, &res);
413 talloc_steal(expr, res);
414 if (ret != LDB_SUCCESS) {
418 for (i=0;i<res->count;i++) {
419 struct ldb_message_element *el;
420 el = ldb_msg_find_element(res->msgs[i], "sid");
421 if (el == NULL || el->num_values != 1) {
422 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
425 string_to_sid(&alias, (char *)el->values[0].data);
426 add_sid_to_array_unique(NULL, &alias, sids, num);
428 status = NT_STATUS_NO_MEMORY;
442 add/remove a memberOf field
444 static NTSTATUS modify_aliasmem(const DOM_SID *alias, const DOM_SID *member,
449 struct ldb_message msg;
450 struct ldb_message_element el;
455 if (!init_group_mapping()) {
456 return NT_STATUS_ACCESS_DENIED;
459 if (!get_group_map_from_sid(*alias, &map)) {
460 sid_to_string(string_sid, alias);
461 return NT_STATUS_NO_SUCH_ALIAS;
464 if ((map.sid_name_use != SID_NAME_ALIAS) &&
465 (map.sid_name_use != SID_NAME_WKN_GRP)) {
466 DEBUG(0,("sid_name_use=%d\n", map.sid_name_use));
467 return NT_STATUS_NO_SUCH_ALIAS;
470 tmp_ctx = talloc_new(NULL);
471 if (tmp_ctx == NULL) {
472 return NT_STATUS_NO_MEMORY;
475 msg.dn = mapping_dn(tmp_ctx, alias);
476 msg.num_elements = 1;
478 el.flags = operation;
479 el.name = talloc_strdup(tmp_ctx, "memberOf");
482 sid_to_string(string_sid, member);
483 val.data = (uint8_t *)string_sid;
484 val.length = strlen(string_sid);
486 ret = ldb_modify(ldb, &msg);
487 talloc_free(tmp_ctx);
489 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
490 return NT_STATUS_NO_SUCH_ALIAS;
493 if (operation == LDB_FLAG_MOD_ADD &&
494 ret == LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS) {
495 return NT_STATUS_MEMBER_IN_ALIAS;
498 return (ret == LDB_SUCCESS ? NT_STATUS_OK : NT_STATUS_ACCESS_DENIED);
501 NTSTATUS add_aliasmem(const DOM_SID *alias, const DOM_SID *member)
503 return modify_aliasmem(alias, member, LDB_FLAG_MOD_ADD);
506 NTSTATUS del_aliasmem(const DOM_SID *alias, const DOM_SID *member)
508 return modify_aliasmem(alias, member, LDB_FLAG_MOD_DELETE);
513 enumerate sids that have the given alias set in memberOf
515 NTSTATUS enum_aliasmem(const DOM_SID *alias, DOM_SID **sids, size_t *num)
517 const char *attrs[] = {
522 struct ldb_result *res=NULL;
524 struct ldb_message_element *el;
526 if (!init_group_mapping()) {
527 return NT_STATUS_ACCESS_DENIED;
533 dn = mapping_dn(ldb, alias);
535 ret = ldb_search(ldb, dn, LDB_SCOPE_BASE, NULL, attrs, &res);
536 talloc_steal(dn, res);
537 if (ret == LDB_SUCCESS && res->count == 0) {
541 if (ret != LDB_SUCCESS) {
543 return NT_STATUS_INTERNAL_DB_CORRUPTION;
546 el = ldb_msg_find_element(res->msgs[0], "memberOf");
549 return NT_STATUS_INTERNAL_DB_CORRUPTION;
552 for (i=0;i<el->num_values;i++) {
554 string_to_sid(&sid, (const char *)el->values[i].data);
555 add_sid_to_array_unique(NULL, &sid, sids, num);
558 return NT_STATUS_NO_MEMORY;
567 upgrade one group mapping record from the old tdb format
569 static int upgrade_map_record(TDB_CONTEXT *tdb_ctx, TDB_DATA key,
570 TDB_DATA data, void *state)
575 if (strncmp(key.dptr, GROUP_PREFIX,
576 MIN(key.dsize, strlen(GROUP_PREFIX))) != 0) {
580 if (!string_to_sid(&map.sid, strlen(GROUP_PREFIX) + (const char *)key.dptr)) {
581 DEBUG(0,("Bad sid key '%s' during upgrade\n", (const char *)key.dptr));
586 ret = tdb_unpack(data.dptr, data.dsize, "ddff",
587 &map.gid, &map.sid_name_use, &map.nt_name, &map.comment);
589 DEBUG(0,("Failed to unpack group map record during upgrade\n"));
594 if (!add_mapping_entry(&map, 0)) {
595 DEBUG(0,("Failed to add mapping entry during upgrade\n"));
604 upgrade one alias record from the old tdb format
606 static int upgrade_alias_record(TDB_CONTEXT *tdb_ctx, TDB_DATA key,
607 TDB_DATA data, void *state)
609 const char *p = data.dptr;
613 if (strncmp(key.dptr, MEMBEROF_PREFIX,
614 MIN(key.dsize, strlen(MEMBEROF_PREFIX))) != 0) {
618 if (!string_to_sid(&member, strlen(MEMBEROF_PREFIX) + (const char *)key.dptr)) {
619 DEBUG(0,("Bad alias key %s during upgrade\n",
620 (const char *)key.dptr));
624 while (next_token(&p, string_sid, " ", sizeof(string_sid))) {
627 string_to_sid(&alias, string_sid);
628 status = add_aliasmem(&alias, &member);
629 if (NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_ALIAS)) {
630 DEBUG(0,("Ignoring orphaned alias record '%s'\n",
632 } else if (!NT_STATUS_IS_OK(status)) {
633 DEBUG(0,("Failed to add alias member during upgrade - %s\n",
644 upgrade from a old style tdb
646 static BOOL mapping_upgrade(const char *tdb_path)
648 static TDB_CONTEXT *tdb;
653 tdb = tdb_open_log(tdb_path, 0, TDB_DEFAULT, O_RDWR, 0600);
654 if (tdb == NULL) goto failed;
656 /* we have to do the map records first, as alias records may
658 ret = tdb_traverse(tdb, upgrade_map_record, &status);
659 if (ret == -1 || status == -1) goto failed;
661 ret = tdb_traverse(tdb, upgrade_alias_record, &status);
662 if (ret == -1 || status == -1) goto failed;
664 if (tdb) tdb_close(tdb);
666 pstrcpy(old_path, tdb_path);
667 pstrcpy(new_path, lock_path("group_mapping.tdb.upgraded"));
669 if (rename(old_path, new_path) != 0) {
670 DEBUG(0,("Failed to rename old group mapping database\n"));
676 DEBUG(0,("Failed to upgrade group mapping database\n"));
677 if (tdb) tdb_close(tdb);