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tevent: call epoll_panic() if EPOLL_CTL_DEL failed
[Samba/gebeck_regimport.git] / source3 / groupdb / mapping_tdb.c
blob088874ff350c2278cdb175a1bc5b45bf14e00b36
1 /*
2 * Unix SMB/CIFS implementation.
3 * RPC Pipe client / server routines
4 * Copyright (C) Andrew Tridgell 1992-2006,
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.
13 *
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.
18 *
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/>.
21 */
22
23 #include "includes.h"
24 #include "system/filesys.h"
25 #include "passdb.h"
26 #include "groupdb/mapping.h"
27 #include "dbwrap/dbwrap.h"
28 #include "dbwrap/dbwrap_open.h"
29 #include "util_tdb.h"
30 #include "../libcli/security/security.h"
31 #include "groupdb/mapping_tdb.h"
32
33 static struct db_context *db; /* used for driver files */
34
35 static bool enum_group_mapping(const struct dom_sid *domsid,
36 enum lsa_SidType sid_name_use,
37 GROUP_MAP ***pp_rmap,
38 size_t *p_num_entries,
39 bool unix_only);
40 static bool group_map_remove(const struct dom_sid *sid);
41
42 static bool mapping_switch(const char *ldb_path);
43
44 /****************************************************************************
45 Open the group mapping tdb.
46 ****************************************************************************/
47 static bool init_group_mapping(void)
48 {
49 const char *ldb_path;
50
51 if (db != NULL) {
52 return true;
53 }
54
55 db = db_open(NULL, state_path("group_mapping.tdb"), 0,
56 TDB_DEFAULT, O_RDWR|O_CREAT, 0600,
57 DBWRAP_LOCK_ORDER_1);
58 if (db == NULL) {
59 DEBUG(0, ("Failed to open group mapping database: %s\n",
60 strerror(errno)));
61 return false;
62 }
63
64 ldb_path = state_path("group_mapping.ldb");
65 if (file_exist(ldb_path) && !mapping_switch(ldb_path)) {
66 unlink(state_path("group_mapping.tdb"));
67 return false;
68
69 } else {
70 /* handle upgrade from old versions of the database */
71 #if 0 /* -- Needs conversion to dbwrap -- */
72 const char *vstring = "INFO/version";
73 int32 vers_id;
74 GROUP_MAP *map_table = NULL;
75 size_t num_entries = 0;
76
77 /* handle a Samba upgrade */
78 tdb_lock_bystring(tdb, vstring);
79
80 /* Cope with byte-reversed older versions of the db. */
81 vers_id = tdb_fetch_int32(tdb, vstring);
82 if ((vers_id == DATABASE_VERSION_V1)
83 || (IREV(vers_id) == DATABASE_VERSION_V1)) {
84 /*
85 * Written on a bigendian machine with old fetch_int
86 * code. Save as le.
87 */
88 tdb_store_int32(tdb, vstring, DATABASE_VERSION_V2);
89 vers_id = DATABASE_VERSION_V2;
90 }
91
92 /* if its an unknown version we remove everthing in the db */
93
94 if (vers_id != DATABASE_VERSION_V2) {
95 tdb_wipe_all(tdb);
96 tdb_store_int32(tdb, vstring, DATABASE_VERSION_V2);
97 }
98
99 tdb_unlock_bystring(tdb, vstring);
100
101 /* cleanup any map entries with a gid == -1 */
102
103 if ( enum_group_mapping( NULL, SID_NAME_UNKNOWN, &map_table,
104 &num_entries, False ) ) {
105 int i;
106
107 for ( i=0; i<num_entries; i++ ) {
108 if ( map_table[i].gid == -1 ) {
109 group_map_remove( &map_table[i].sid );
110 }
111 }
112
113 SAFE_FREE( map_table );
114 }
115 #endif
116 }
117 return true;
118 }
119
120 static char *group_mapping_key(TALLOC_CTX *mem_ctx, const struct dom_sid *sid)
121 {
122 char *sidstr, *result;
123
124 sidstr = sid_string_talloc(talloc_tos(), sid);
125 if (sidstr == NULL) {
126 return NULL;
127 }
128
129 result = talloc_asprintf(mem_ctx, "%s%s", GROUP_PREFIX, sidstr);
130
131 TALLOC_FREE(sidstr);
132 return result;
133 }
134
135 /****************************************************************************
136 ****************************************************************************/
137 static bool add_mapping_entry(GROUP_MAP *map, int flag)
138 {
139 char *key, *buf;
140 int len;
141 NTSTATUS status;
142
143 key = group_mapping_key(talloc_tos(), &map->sid);
144 if (key == NULL) {
145 return false;
146 }
147
148 len = tdb_pack(NULL, 0, "ddff",
149 map->gid, map->sid_name_use, map->nt_name, map->comment);
150
151 buf = talloc_array(key, char, len);
152 if (!buf) {
153 TALLOC_FREE(key);
154 return false;
155 }
156 len = tdb_pack((uint8 *)buf, len, "ddff", map->gid,
157 map->sid_name_use, map->nt_name, map->comment);
158
159 status = dbwrap_trans_store(
160 db, string_term_tdb_data(key),
161 make_tdb_data((uint8_t *)buf, len), TDB_REPLACE);
162
163 TALLOC_FREE(key);
164
165 return NT_STATUS_IS_OK(status);
166 }
167
168
169 /****************************************************************************
170 Return the sid and the type of the unix group.
171 ****************************************************************************/
172
173 static bool get_group_map_from_sid(struct dom_sid sid, GROUP_MAP *map)
174 {
175 TDB_DATA dbuf;
176 char *key;
177 int ret = 0;
178 NTSTATUS status;
179 fstring nt_name;
180 fstring comment;
181
182 /* the key is the SID, retrieving is direct */
183
184 key = group_mapping_key(talloc_tos(), &sid);
185 if (key == NULL) {
186 return false;
187 }
188
189 status = dbwrap_fetch_bystring(db, key, key, &dbuf);
190 if (!NT_STATUS_IS_OK(status)) {
191 TALLOC_FREE(key);
192 return false;
193 }
194
195 ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff",
196 &map->gid, &map->sid_name_use,
197 &nt_name, &comment);
198
199 TALLOC_FREE(key);
200
201 if ( ret == -1 ) {
202 DEBUG(3,("get_group_map_from_sid: tdb_unpack failure\n"));
203 return false;
204 }
205
206 sid_copy(&map->sid, &sid);
207
208 map->nt_name = talloc_strdup(map, nt_name);
209 if (!map->nt_name) {
210 return false;
211 }
212 map->comment = talloc_strdup(map, comment);
213 if (!map->comment) {
214 return false;
215 }
216
217 return true;
218 }
219
220 static bool dbrec2map(const struct db_record *rec, GROUP_MAP *map)
221 {
222 TDB_DATA key = dbwrap_record_get_key(rec);
223 TDB_DATA value = dbwrap_record_get_value(rec);
224 int ret = 0;
225 fstring nt_name;
226 fstring comment;
227
228 if ((key.dsize < strlen(GROUP_PREFIX))
229 || (strncmp((char *)key.dptr, GROUP_PREFIX,
230 GROUP_PREFIX_LEN) != 0)) {
231 return False;
232 }
233
234 if (!string_to_sid(&map->sid, (const char *)key.dptr
235 + GROUP_PREFIX_LEN)) {
236 return False;
237 }
238
239 ret = tdb_unpack(value.dptr, value.dsize, "ddff",
240 &map->gid, &map->sid_name_use,
241 &nt_name, &comment);
242
243 if (ret == -1) {
244 DEBUG(3, ("dbrec2map: tdb_unpack failure\n"));
245 return false;
246 }
247
248 map->nt_name = talloc_strdup(map, nt_name);
249 if (!map->nt_name) {
250 return false;
251 }
252 map->comment = talloc_strdup(map, comment);
253 if (!map->comment) {
254 return false;
255 }
256
257 return true;
258 }
259
260 struct find_map_state {
261 bool found;
262 const char *name; /* If != NULL, look for name */
263 gid_t gid; /* valid iff name == NULL */
264 GROUP_MAP *map;
265 };
266
267 static int find_map(struct db_record *rec, void *private_data)
268 {
269 struct find_map_state *state = (struct find_map_state *)private_data;
270
271 if (!dbrec2map(rec, state->map)) {
272 DEBUG(10, ("failed to unpack map\n"));
273 return 0;
274 }
275
276 if (state->name != NULL) {
277 if (strequal(state->name, state->map->nt_name)) {
278 state->found = true;
279 return 1;
280 }
281 }
282 else {
283 if (state->map->gid == state->gid) {
284 state->found = true;
285 return 1;
286 }
287 }
288
289 return 0;
290 }
291
292 /****************************************************************************
293 Return the sid and the type of the unix group.
294 ****************************************************************************/
295
296 static bool get_group_map_from_gid(gid_t gid, GROUP_MAP *map)
297 {
298 struct find_map_state state;
299
300 state.found = false;
301 state.name = NULL; /* Indicate we're looking for gid */
302 state.gid = gid;
303 state.map = map;
304
305 dbwrap_traverse_read(db, find_map, (void *)&state, NULL);
306
307 return state.found;
308 }
309
310 /****************************************************************************
311 Return the sid and the type of the unix group.
312 ****************************************************************************/
313
314 static bool get_group_map_from_ntname(const char *name, GROUP_MAP *map)
315 {
316 struct find_map_state state;
317
318 state.found = false;
319 state.name = name;
320 state.map = map;
321
322 dbwrap_traverse_read(db, find_map, (void *)&state, NULL);
323
324 return state.found;
325 }
326
327 /****************************************************************************
328 Remove a group mapping entry.
329 ****************************************************************************/
330
331 static bool group_map_remove(const struct dom_sid *sid)
332 {
333 char *key;
334 NTSTATUS status;
335
336 key = group_mapping_key(talloc_tos(), sid);
337 if (key == NULL) {
338 return false;
339 }
340
341 status = dbwrap_trans_delete(db, string_term_tdb_data(key));
342
343 TALLOC_FREE(key);
344 return NT_STATUS_IS_OK(status);
345 }
346
347 /****************************************************************************
348 Enumerate the group mapping.
349 ****************************************************************************/
350
351 struct enum_map_state {
352 const struct dom_sid *domsid;
353 enum lsa_SidType sid_name_use;
354 bool unix_only;
355
356 size_t num_maps;
357 GROUP_MAP **maps;
358 };
359
360 static int collect_map(struct db_record *rec, void *private_data)
361 {
362 struct enum_map_state *state = (struct enum_map_state *)private_data;
363 GROUP_MAP *map;
364 GROUP_MAP **tmp;
365
366 map = talloc_zero(NULL, GROUP_MAP);
367 if (!map) {
368 DEBUG(0, ("Unable to allocate group map!\n"));
369 return 1;
370 }
371
372 if (!dbrec2map(rec, map)) {
373 TALLOC_FREE(map);
374 return 0;
375 }
376 /* list only the type or everything if UNKNOWN */
377 if (state->sid_name_use != SID_NAME_UNKNOWN
378 && state->sid_name_use != map->sid_name_use) {
379 DEBUG(11,("enum_group_mapping: group %s is not of the "
380 "requested type\n", map->nt_name));
381 TALLOC_FREE(map);
382 return 0;
383 }
384
385 if ((state->unix_only == ENUM_ONLY_MAPPED) && (map->gid == -1)) {
386 DEBUG(11,("enum_group_mapping: group %s is non mapped\n",
387 map->nt_name));
388 TALLOC_FREE(map);
389 return 0;
390 }
391
392 if ((state->domsid != NULL) &&
393 (dom_sid_compare_domain(state->domsid, &map->sid) != 0)) {
394 DEBUG(11,("enum_group_mapping: group %s is not in domain\n",
395 sid_string_dbg(&map->sid)));
396 TALLOC_FREE(map);
397 return 0;
398 }
399
400 tmp = talloc_realloc(NULL, state->maps, GROUP_MAP *,
401 state->num_maps + 1);
402 if (!tmp) {
403 DEBUG(0,("enum_group_mapping: Unable to enlarge group "
404 "map!\n"));
405 TALLOC_FREE(map);
406 return 1;
407 }
408
409 state->maps = tmp;
410 state->maps[state->num_maps] = talloc_move(state->maps, &map);
411 state->num_maps++;
412 return 0;
413 }
414
415 static bool enum_group_mapping(const struct dom_sid *domsid,
416 enum lsa_SidType sid_name_use,
417 GROUP_MAP ***pp_rmap,
418 size_t *p_num_entries, bool unix_only)
419 {
420 struct enum_map_state state;
421 NTSTATUS status;
422
423 state.domsid = domsid;
424 state.sid_name_use = sid_name_use;
425 state.unix_only = unix_only;
426 state.num_maps = 0;
427 state.maps = NULL;
428
429 status = dbwrap_traverse_read(db, collect_map, (void *)&state, NULL);
430 if (!NT_STATUS_IS_OK(status)) {
431 TALLOC_FREE(state.maps);
432 return false;
433 }
434
435 *pp_rmap = state.maps;
436 *p_num_entries = state.num_maps;
437
438 return true;
439 }
440
441 /* This operation happens on session setup, so it should better be fast. We
442 * store a list of aliases a SID is member of hanging off MEMBEROF/SID. */
443
444 static NTSTATUS one_alias_membership(const struct dom_sid *member,
445 struct dom_sid **sids, size_t *num)
446 {
447 fstring tmp;
448 fstring key;
449 char *string_sid;
450 TDB_DATA dbuf;
451 const char *p;
452 NTSTATUS status = NT_STATUS_OK;
453 TALLOC_CTX *frame = talloc_stackframe();
454
455 slprintf(key, sizeof(key), "%s%s", MEMBEROF_PREFIX,
456 sid_to_fstring(tmp, member));
457
458 status = dbwrap_fetch_bystring(db, frame, key, &dbuf);
459 if (!NT_STATUS_IS_OK(status)) {
460 TALLOC_FREE(frame);
461 return NT_STATUS_OK;
462 }
463
464 p = (const char *)dbuf.dptr;
465
466 while (next_token_talloc(frame, &p, &string_sid, " ")) {
467 struct dom_sid alias;
468 uint32_t num_sids;
469
470 if (!string_to_sid(&alias, string_sid))
471 continue;
472
473 num_sids = *num;
474 status= add_sid_to_array_unique(NULL, &alias, sids, &num_sids);
475 if (!NT_STATUS_IS_OK(status)) {
476 goto done;
477 }
478 *num = num_sids;
479 }
480
481 done:
482 TALLOC_FREE(frame);
483 return status;
484 }
485
486 static NTSTATUS alias_memberships(const struct dom_sid *members, size_t num_members,
487 struct dom_sid **sids, size_t *num)
488 {
489 size_t i;
490
491 *num = 0;
492 *sids = NULL;
493
494 for (i=0; i<num_members; i++) {
495 NTSTATUS status = one_alias_membership(&members[i], sids, num);
496 if (!NT_STATUS_IS_OK(status))
497 return status;
498 }
499 return NT_STATUS_OK;
500 }
501
502 static bool is_aliasmem(const struct dom_sid *alias, const struct dom_sid *member)
503 {
504 struct dom_sid *sids;
505 size_t i;
506 size_t num;
507
508 /* This feels the wrong way round, but the on-disk data structure
509 * dictates it this way. */
510 if (!NT_STATUS_IS_OK(alias_memberships(member, 1, &sids, &num)))
511 return False;
512
513 for (i=0; i<num; i++) {
514 if (dom_sid_compare(alias, &sids[i]) == 0) {
515 TALLOC_FREE(sids);
516 return True;
517 }
518 }
519 TALLOC_FREE(sids);
520 return False;
521 }
522
523
524 static NTSTATUS add_aliasmem(const struct dom_sid *alias, const struct dom_sid *member)
525 {
526 GROUP_MAP *map;
527 char *key;
528 fstring string_sid;
529 char *new_memberstring;
530 struct db_record *rec;
531 NTSTATUS status;
532 TDB_DATA value;
533
534 map = talloc_zero(talloc_tos(), GROUP_MAP);
535 if (!map) {
536 return NT_STATUS_NO_MEMORY;
537 }
538
539 if (!get_group_map_from_sid(*alias, map)) {
540 TALLOC_FREE(map);
541 return NT_STATUS_NO_SUCH_ALIAS;
542 }
543
544 if ((map->sid_name_use != SID_NAME_ALIAS) &&
545 (map->sid_name_use != SID_NAME_WKN_GRP)) {
546 TALLOC_FREE(map);
547 return NT_STATUS_NO_SUCH_ALIAS;
548 }
549
550 TALLOC_FREE(map);
551
552 if (is_aliasmem(alias, member))
553 return NT_STATUS_MEMBER_IN_ALIAS;
554
555 sid_to_fstring(string_sid, member);
556
557 key = talloc_asprintf(talloc_tos(), "%s%s", MEMBEROF_PREFIX,
558 string_sid);
559 if (key == NULL) {
560 return NT_STATUS_NO_MEMORY;
561 }
562
563 if (dbwrap_transaction_start(db) != 0) {
564 DEBUG(0, ("transaction_start failed\n"));
565 return NT_STATUS_INTERNAL_DB_CORRUPTION;
566 }
567
568 rec = dbwrap_fetch_locked(db, key, string_term_tdb_data(key));
569
570 if (rec == NULL) {
571 DEBUG(10, ("fetch_lock failed\n"));
572 TALLOC_FREE(key);
573 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
574 goto cancel;
575 }
576
577 value = dbwrap_record_get_value(rec);
578
579 sid_to_fstring(string_sid, alias);
580
581 if (value.dptr != NULL) {
582 new_memberstring = talloc_asprintf(
583 key, "%s %s", (char *)(value.dptr), string_sid);
584 } else {
585 new_memberstring = talloc_strdup(key, string_sid);
586 }
587
588 if (new_memberstring == NULL) {
589 TALLOC_FREE(key);
590 status = NT_STATUS_NO_MEMORY;
591 goto cancel;
592 }
593
594 status = dbwrap_record_store(rec, string_term_tdb_data(new_memberstring), 0);
595
596 TALLOC_FREE(key);
597
598 if (!NT_STATUS_IS_OK(status)) {
599 DEBUG(10, ("Could not store record: %s\n", nt_errstr(status)));
600 goto cancel;
601 }
602
603 if (dbwrap_transaction_commit(db) != 0) {
604 DEBUG(0, ("transaction_commit failed\n"));
605 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
606 return status;
607 }
608
609 return NT_STATUS_OK;
610
611 cancel:
612 if (dbwrap_transaction_cancel(db) != 0) {
613 smb_panic("transaction_cancel failed");
614 }
615
616 return status;
617 }
618
619 struct aliasmem_state {
620 TALLOC_CTX *mem_ctx;
621 const struct dom_sid *alias;
622 struct dom_sid **sids;
623 size_t *num;
624 };
625
626 static int collect_aliasmem(struct db_record *rec, void *priv)
627 {
628 struct aliasmem_state *state = (struct aliasmem_state *)priv;
629 const char *p;
630 char *alias_string;
631 TALLOC_CTX *frame;
632 TDB_DATA key = dbwrap_record_get_key(rec);
633 TDB_DATA value = dbwrap_record_get_value(rec);
634
635 if (strncmp((const char *)key.dptr, MEMBEROF_PREFIX,
636 MEMBEROF_PREFIX_LEN) != 0)
637 return 0;
638
639 p = (const char *)value.dptr;
640
641 frame = talloc_stackframe();
642
643 while (next_token_talloc(frame, &p, &alias_string, " ")) {
644 struct dom_sid alias, member;
645 const char *member_string;
646 uint32_t num_sids;
647
648 if (!string_to_sid(&alias, alias_string))
649 continue;
650
651 if (dom_sid_compare(state->alias, &alias) != 0)
652 continue;
653
654 /* Ok, we found the alias we're looking for in the membership
655 * list currently scanned. The key represents the alias
656 * member. Add that. */
657
658 member_string = strchr((const char *)key.dptr, '/');
659
660 /* Above we tested for MEMBEROF_PREFIX which includes the
661 * slash. */
662
663 SMB_ASSERT(member_string != NULL);
664 member_string += 1;
665
666 if (!string_to_sid(&member, member_string))
667 continue;
668
669 num_sids = *state->num;
670 if (!NT_STATUS_IS_OK(add_sid_to_array(state->mem_ctx, &member,
671 state->sids,
672 &num_sids)))
673 {
674 /* talloc fail. */
675 break;
676 }
677 *state->num = num_sids;
678 }
679
680 TALLOC_FREE(frame);
681 return 0;
682 }
683
684 static NTSTATUS enum_aliasmem(const struct dom_sid *alias, TALLOC_CTX *mem_ctx,
685 struct dom_sid **sids, size_t *num)
686 {
687 GROUP_MAP *map;
688 struct aliasmem_state state;
689
690 map = talloc_zero(talloc_tos(), GROUP_MAP);
691 if (!map) {
692 return NT_STATUS_NO_MEMORY;
693 }
694
695 if (!get_group_map_from_sid(*alias, map)) {
696 TALLOC_FREE(map);
697 return NT_STATUS_NO_SUCH_ALIAS;
698 }
699
700 if ((map->sid_name_use != SID_NAME_ALIAS) &&
701 (map->sid_name_use != SID_NAME_WKN_GRP)) {
702 TALLOC_FREE(map);
703 return NT_STATUS_NO_SUCH_ALIAS;
704 }
705
706 TALLOC_FREE(map);
707
708 *sids = NULL;
709 *num = 0;
710
711 state.alias = alias;
712 state.sids = sids;
713 state.num = num;
714 state.mem_ctx = mem_ctx;
715
716 dbwrap_traverse_read(db, collect_aliasmem, &state, NULL);
717 return NT_STATUS_OK;
718 }
719
720 static NTSTATUS del_aliasmem(const struct dom_sid *alias, const struct dom_sid *member)
721 {
722 NTSTATUS status;
723 struct dom_sid *sids;
724 size_t i, num;
725 bool found = False;
726 char *member_string;
727 char *key;
728 fstring sid_string;
729
730 if (dbwrap_transaction_start(db) != 0) {
731 DEBUG(0, ("transaction_start failed\n"));
732 return NT_STATUS_INTERNAL_DB_CORRUPTION;
733 }
734
735 status = alias_memberships(member, 1, &sids, &num);
736
737 if (!NT_STATUS_IS_OK(status)) {
738 goto cancel;
739 }
740
741 for (i=0; i<num; i++) {
742 if (dom_sid_compare(&sids[i], alias) == 0) {
743 found = True;
744 break;
745 }
746 }
747
748 if (!found) {
749 TALLOC_FREE(sids);
750 status = NT_STATUS_MEMBER_NOT_IN_ALIAS;
751 goto cancel;
752 }
753
754 if (i < num)
755 sids[i] = sids[num-1];
756
757 num -= 1;
758
759 sid_to_fstring(sid_string, member);
760
761 key = talloc_asprintf(sids, "%s%s", MEMBEROF_PREFIX, sid_string);
762 if (key == NULL) {
763 TALLOC_FREE(sids);
764 status = NT_STATUS_NO_MEMORY;
765 goto cancel;
766 }
767
768 if (num == 0) {
769 status = dbwrap_delete_bystring(db, key);
770 goto commit;
771 }
772
773 member_string = talloc_strdup(sids, "");
774 if (member_string == NULL) {
775 TALLOC_FREE(sids);
776 status = NT_STATUS_NO_MEMORY;
777 goto cancel;
778 }
779
780 for (i=0; i<num; i++) {
781
782 sid_to_fstring(sid_string, &sids[i]);
783
784 member_string = talloc_asprintf_append_buffer(
785 member_string, " %s", sid_string);
786
787 if (member_string == NULL) {
788 TALLOC_FREE(sids);
789 status = NT_STATUS_NO_MEMORY;
790 goto cancel;
791 }
792 }
793
794 status = dbwrap_store_bystring(
795 db, key, string_term_tdb_data(member_string), 0);
796 commit:
797 TALLOC_FREE(sids);
798
799 if (!NT_STATUS_IS_OK(status)) {
800 DEBUG(10, ("dbwrap_store_bystring failed: %s\n",
801 nt_errstr(status)));
802 goto cancel;
803 }
804
805 if (dbwrap_transaction_commit(db) != 0) {
806 DEBUG(0, ("transaction_commit failed\n"));
807 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
808 return status;
809 }
810
811 return NT_STATUS_OK;
812
813 cancel:
814 if (dbwrap_transaction_cancel(db) != 0) {
815 smb_panic("transaction_cancel failed");
816 }
817 return status;
818 }
819
820
821 /* -- ldb->tdb switching code -------------------------------------------- */
822
823 /* change this if the data format ever changes */
824 #define LTDB_PACKING_FORMAT 0x26011967
825
826 /* old packing formats (not supported for now,
827 * it was never used for group mapping AFAIK) */
828 #define LTDB_PACKING_FORMAT_NODN 0x26011966
829
830 static unsigned int pull_uint32(uint8_t *p, int ofs)
831 {
832 p += ofs;
833 return p[0] | (p[1]<<8) | (p[2]<<16) | (p[3]<<24);
834 }
835
836 /*
837 unpack a ldb message from a linear buffer in TDB_DATA
838 */
839 static int convert_ldb_record(TDB_CONTEXT *ltdb, TDB_DATA key,
840 TDB_DATA data, void *ptr)
841 {
842 TALLOC_CTX *tmp_ctx = talloc_tos();
843 GROUP_MAP *map = NULL;
844 uint8_t *p;
845 uint32_t format;
846 uint32_t num_el;
847 unsigned int remaining;
848 unsigned int i, j;
849 size_t len;
850 char *name;
851 char *val;
852 char *q;
853 uint32_t num_mem = 0;
854 struct dom_sid *members = NULL;
855
856 p = (uint8_t *)data.dptr;
857 if (data.dsize < 8) {
858 errno = EIO;
859 goto failed;
860 }
861
862 format = pull_uint32(p, 0);
863 num_el = pull_uint32(p, 4);
864 p += 8;
865
866 remaining = data.dsize - 8;
867
868 switch (format) {
869 case LTDB_PACKING_FORMAT:
870 len = strnlen((char *)p, remaining);
871 if (len == remaining) {
872 errno = EIO;
873 goto failed;
874 }
875
876 if (*p == '@') {
877 /* ignore special LDB attributes */
878 return 0;
879 }
880
881 if (strncmp((char *)p, "rid=", 4)) {
882 /* unknown entry, ignore */
883 DEBUG(3, ("Found unknown entry in group mapping "
884 "database named [%s]\n", (char *)p));
885 return 0;
886 }
887
888 remaining -= len + 1;
889 p += len + 1;
890 break;
891
892 case LTDB_PACKING_FORMAT_NODN:
893 default:
894 errno = EIO;
895 goto failed;
896 }
897
898 if (num_el == 0) {
899 /* bad entry, ignore */
900 return 0;
901 }
902
903 if (num_el > remaining / 6) {
904 errno = EIO;
905 goto failed;
906 }
907
908 map = talloc_zero(NULL, GROUP_MAP);
909 if (!map) {
910 errno = ENOMEM;
911 goto failed;
912 }
913
914 for (i = 0; i < num_el; i++) {
915 uint32_t num_vals;
916
917 if (remaining < 10) {
918 errno = EIO;
919 goto failed;
920 }
921 len = strnlen((char *)p, remaining - 6);
922 if (len == remaining - 6) {
923 errno = EIO;
924 goto failed;
925 }
926 name = talloc_strndup(tmp_ctx, (char *)p, len);
927 if (name == NULL) {
928 errno = ENOMEM;
929 goto failed;
930 }
931 remaining -= len + 1;
932 p += len + 1;
933
934 num_vals = pull_uint32(p, 0);
935 if (strcasecmp_m(name, "member") == 0) {
936 num_mem = num_vals;
937 members = talloc_array(tmp_ctx, struct dom_sid, num_mem);
938 if (members == NULL) {
939 errno = ENOMEM;
940 goto failed;
941 }
942 } else if (num_vals != 1) {
943 errno = EIO;
944 goto failed;
945 }
946
947 p += 4;
948 remaining -= 4;
949
950 for (j = 0; j < num_vals; j++) {
951 len = pull_uint32(p, 0);
952 if (len > remaining-5) {
953 errno = EIO;
954 goto failed;
955 }
956
957 val = talloc_strndup(tmp_ctx, (char *)(p + 4), len);
958 if (val == NULL) {
959 errno = ENOMEM;
960 goto failed;
961 }
962
963 remaining -= len+4+1;
964 p += len+4+1;
965
966 /* we ignore unknown or uninteresting attributes
967 * (objectclass, etc.) */
968 if (strcasecmp_m(name, "gidNumber") == 0) {
969 map->gid = strtoul(val, &q, 10);
970 if (*q) {
971 errno = EIO;
972 goto failed;
973 }
974 } else if (strcasecmp_m(name, "sid") == 0) {
975 if (!string_to_sid(&map->sid, val)) {
976 errno = EIO;
977 goto failed;
978 }
979 } else if (strcasecmp_m(name, "sidNameUse") == 0) {
980 map->sid_name_use = strtoul(val, &q, 10);
981 if (*q) {
982 errno = EIO;
983 goto failed;
984 }
985 } else if (strcasecmp_m(name, "ntname") == 0) {
986 map->nt_name = talloc_strdup(map, val);
987 if (!map->nt_name) {
988 errno = ENOMEM;
989 goto failed;
990 }
991 } else if (strcasecmp_m(name, "comment") == 0) {
992 map->comment = talloc_strdup(map, val);
993 if (!map->comment) {
994 errno = ENOMEM;
995 goto failed;
996 }
997 } else if (strcasecmp_m(name, "member") == 0) {
998 if (!string_to_sid(&members[j], val)) {
999 errno = EIO;
1000 goto failed;
1001 }
1002 }
1003
1004 TALLOC_FREE(val);
1005 }
1006
1007 TALLOC_FREE(name);
1008 }
1009
1010 if (map->nt_name == NULL) {
1011 errno = EIO;
1012 goto failed;
1013 }
1014
1015 if (map->comment == NULL) {
1016 map->comment = talloc_strdup(map, "");
1017 }
1018 if (map->comment == NULL) {
1019 errno = ENOMEM;
1020 goto failed;
1021 }
1022
1023 if (!add_mapping_entry(map, 0)) {
1024 errno = EIO;
1025 goto failed;
1026 }
1027
1028 if (num_mem) {
1029 for (j = 0; j < num_mem; j++) {
1030 NTSTATUS status;
1031 status = add_aliasmem(&map->sid, &members[j]);
1032 if (!NT_STATUS_IS_OK(status)) {
1033 errno = EIO;
1034 goto failed;
1035 }
1036 }
1037 }
1038
1039 if (remaining != 0) {
1040 DEBUG(0, ("Errror: %d bytes unread in ltdb_unpack_data\n",
1041 remaining));
1042 }
1043
1044 TALLOC_FREE(map);
1045 return 0;
1046
1047 failed:
1048 TALLOC_FREE(map);
1049 return -1;
1050 }
1051
1052 static bool mapping_switch(const char *ldb_path)
1053 {
1054 TDB_CONTEXT *ltdb;
1055 TALLOC_CTX *frame;
1056 char *new_path;
1057 int ret;
1058
1059 frame = talloc_stackframe();
1060
1061 ltdb = tdb_open_log(ldb_path, 0, TDB_DEFAULT, O_RDONLY, 0600);
1062 if (ltdb == NULL) goto failed;
1063
1064 /* ldb is just a very fancy tdb, read out raw data and perform
1065 * conversion */
1066 ret = tdb_traverse(ltdb, convert_ldb_record, NULL);
1067 if (ret < 0) goto failed;
1068
1069 if (ltdb) {
1070 tdb_close(ltdb);
1071 ltdb = NULL;
1072 }
1073
1074 /* now rename the old db out of the way */
1075 new_path = state_path("group_mapping.ldb.replaced");
1076 if (!new_path) {
1077 goto failed;
1078 }
1079 if (rename(ldb_path, new_path) != 0) {
1080 DEBUG(0,("Failed to rename old group mapping database\n"));
1081 goto failed;
1082 }
1083 TALLOC_FREE(frame);
1084 return True;
1085
1086 failed:
1087 DEBUG(0, ("Failed to switch to tdb group mapping database\n"));
1088 if (ltdb) tdb_close(ltdb);
1089 TALLOC_FREE(frame);
1090 return False;
1091 }
1092
1093 static const struct mapping_backend tdb_backend = {
1094 .add_mapping_entry = add_mapping_entry,
1095 .get_group_map_from_sid = get_group_map_from_sid,
1096 .get_group_map_from_gid = get_group_map_from_gid,
1097 .get_group_map_from_ntname = get_group_map_from_ntname,
1098 .group_map_remove = group_map_remove,
1099 .enum_group_mapping = enum_group_mapping,
1100 .one_alias_membership = one_alias_membership,
1101 .add_aliasmem = add_aliasmem,
1102 .del_aliasmem = del_aliasmem,
1103 .enum_aliasmem = enum_aliasmem
1104 };
1105
1106 /*
1107 initialise the tdb mapping backend
1108 */
1109 const struct mapping_backend *groupdb_tdb_init(void)
1110 {
1111 if (!init_group_mapping()) {
1112 DEBUG(0,("Failed to initialise tdb mapping backend\n"));
1113 return NULL;
1114 }
1115
1116 return &tdb_backend;
1117 }
reg import