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Fix self granting privileges in security=ads.
[Samba.git] / source3 / winbindd / idmap_tdb.c
blob189b088809155e6f91a7bebcdaadd1282109c166
1 /*
2 Unix SMB/CIFS implementation.
3
4 idmap TDB backend
5
6 Copyright (C) Tim Potter 2000
7 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
8 Copyright (C) Jeremy Allison 2006
9 Copyright (C) Simo Sorce 2003-2006
10
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 */
24
25 #include "includes.h"
26 #include "winbindd.h"
27
28 #undef DBGC_CLASS
29 #define DBGC_CLASS DBGC_IDMAP
30
31 /* idmap version determines auto-conversion - this is the database
32 structure version specifier. */
33
34 #define IDMAP_VERSION 2
35
36 /* High water mark keys */
37 #define HWM_GROUP "GROUP HWM"
38 #define HWM_USER "USER HWM"
39
40 static struct idmap_tdb_state {
41
42 /* User and group id pool */
43 uid_t low_uid, high_uid; /* Range of uids to allocate */
44 gid_t low_gid, high_gid; /* Range of gids to allocate */
45
46 } idmap_tdb_state;
47
48 struct convert_fn_state {
49 struct db_context *db;
50 bool failed;
51 };
52
53 /*****************************************************************************
54 For idmap conversion: convert one record to new format
55 Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
56 instead of the SID.
57 *****************************************************************************/
58 static int convert_fn(struct db_record *rec, void *private_data)
59 {
60 struct winbindd_domain *domain;
61 char *p;
62 NTSTATUS status;
63 DOM_SID sid;
64 uint32 rid;
65 fstring keystr;
66 fstring dom_name;
67 TDB_DATA key2;
68 struct convert_fn_state *s = (struct convert_fn_state *)private_data;
69
70 DEBUG(10,("Converting %s\n", (const char *)rec->key.dptr));
71
72 p = strchr((const char *)rec->key.dptr, '/');
73 if (!p)
74 return 0;
75
76 *p = 0;
77 fstrcpy(dom_name, (const char *)rec->key.dptr);
78 *p++ = '/';
79
80 domain = find_domain_from_name(dom_name);
81 if (domain == NULL) {
82 /* We must delete the old record. */
83 DEBUG(0,("Unable to find domain %s\n", dom_name ));
84 DEBUG(0,("deleting record %s\n", (const char *)rec->key.dptr ));
85
86 status = rec->delete_rec(rec);
87 if (!NT_STATUS_IS_OK(status)) {
88 DEBUG(0, ("Unable to delete record %s:%s\n",
89 (const char *)rec->key.dptr,
90 nt_errstr(status)));
91 s->failed = true;
92 return -1;
93 }
94
95 return 0;
96 }
97
98 rid = atoi(p);
99
100 sid_copy(&sid, &domain->sid);
101 sid_append_rid(&sid, rid);
102
103 sid_to_fstring(keystr, &sid);
104 key2 = string_term_tdb_data(keystr);
105
106 status = dbwrap_store(s->db, key2, rec->value, TDB_INSERT);
107 if (!NT_STATUS_IS_OK(status)) {
108 DEBUG(0,("Unable to add record %s:%s\n",
109 (const char *)key2.dptr,
110 nt_errstr(status)));
111 s->failed = true;
112 return -1;
113 }
114
115 status = dbwrap_store(s->db, rec->value, key2, TDB_REPLACE);
116 if (!NT_STATUS_IS_OK(status)) {
117 DEBUG(0,("Unable to update record %s:%s\n",
118 (const char *)rec->value.dptr,
119 nt_errstr(status)));
120 s->failed = true;
121 return -1;
122 }
123
124 status = rec->delete_rec(rec);
125 if (!NT_STATUS_IS_OK(status)) {
126 DEBUG(0,("Unable to delete record %s:%s\n",
127 (const char *)rec->key.dptr,
128 nt_errstr(status)));
129 s->failed = true;
130 return -1;
131 }
132
133 return 0;
134 }
135
136 /*****************************************************************************
137 Convert the idmap database from an older version.
138 *****************************************************************************/
139
140 static bool idmap_tdb_upgrade(struct db_context *db)
141 {
142 int32 vers;
143 bool bigendianheader;
144 struct convert_fn_state s;
145
146 DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
147
148 bigendianheader = (db->get_flags(db) & TDB_BIGENDIAN) ? True : False;
149
150 vers = dbwrap_fetch_int32(db, "IDMAP_VERSION");
151
152 if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
153 /* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
154 /*
155 * high and low records were created on a
156 * big endian machine and will need byte-reversing.
157 */
158
159 int32 wm;
160
161 wm = dbwrap_fetch_int32(db, HWM_USER);
162
163 if (wm != -1) {
164 wm = IREV(wm);
165 } else {
166 wm = idmap_tdb_state.low_uid;
167 }
168
169 if (dbwrap_store_int32(db, HWM_USER, wm) == -1) {
170 DEBUG(0, ("Unable to byteswap user hwm in idmap database\n"));
171 return False;
172 }
173
174 wm = dbwrap_fetch_int32(db, HWM_GROUP);
175 if (wm != -1) {
176 wm = IREV(wm);
177 } else {
178 wm = idmap_tdb_state.low_gid;
179 }
180
181 if (dbwrap_store_int32(db, HWM_GROUP, wm) == -1) {
182 DEBUG(0, ("Unable to byteswap group hwm in idmap database\n"));
183 return False;
184 }
185 }
186
187 s.db = db;
188 s.failed = false;
189
190 /* the old format stored as DOMAIN/rid - now we store the SID direct */
191 db->traverse(db, convert_fn, &s);
192
193 if (s.failed) {
194 DEBUG(0, ("Problem during conversion\n"));
195 return False;
196 }
197
198 if (dbwrap_store_int32(db, "IDMAP_VERSION", IDMAP_VERSION) == -1) {
199 DEBUG(0, ("Unable to store idmap version in databse\n"));
200 return False;
201 }
202
203 return True;
204 }
205
206 static NTSTATUS idmap_tdb_load_ranges(void)
207 {
208 uid_t low_uid = 0;
209 uid_t high_uid = 0;
210 gid_t low_gid = 0;
211 gid_t high_gid = 0;
212
213 if (!lp_idmap_uid(&low_uid, &high_uid)) {
214 DEBUG(1, ("idmap uid missing\n"));
215 return NT_STATUS_UNSUCCESSFUL;
216 }
217
218 if (!lp_idmap_gid(&low_gid, &high_gid)) {
219 DEBUG(1, ("idmap gid missing\n"));
220 return NT_STATUS_UNSUCCESSFUL;
221 }
222
223 idmap_tdb_state.low_uid = low_uid;
224 idmap_tdb_state.high_uid = high_uid;
225 idmap_tdb_state.low_gid = low_gid;
226 idmap_tdb_state.high_gid = high_gid;
227
228 if (idmap_tdb_state.high_uid <= idmap_tdb_state.low_uid) {
229 DEBUG(1, ("idmap uid range missing or invalid\n"));
230 return NT_STATUS_UNSUCCESSFUL;
231 }
232
233 if (idmap_tdb_state.high_gid <= idmap_tdb_state.low_gid) {
234 DEBUG(1, ("idmap gid range missing or invalid\n"));
235 return NT_STATUS_UNSUCCESSFUL;
236 }
237
238 return NT_STATUS_OK;
239 }
240
241 static NTSTATUS idmap_tdb_open_db(TALLOC_CTX *memctx,
242 bool check_config,
243 struct db_context **dbctx)
244 {
245 NTSTATUS ret;
246 TALLOC_CTX *ctx;
247 char *tdbfile = NULL;
248 struct db_context *db = NULL;
249 int32_t version;
250 bool config_error = false;
251
252 ret = idmap_tdb_load_ranges();
253 if (!NT_STATUS_IS_OK(ret)) {
254 config_error = true;
255 if (check_config) {
256 return ret;
257 }
258 }
259
260 /* use our own context here */
261 ctx = talloc_stackframe();
262
263 /* use the old database if present */
264 tdbfile = state_path("winbindd_idmap.tdb");
265 if (!tdbfile) {
266 DEBUG(0, ("Out of memory!\n"));
267 ret = NT_STATUS_NO_MEMORY;
268 goto done;
269 }
270
271 DEBUG(10,("Opening tdbfile %s\n", tdbfile ));
272
273 /* Open idmap repository */
274 db = db_open(ctx, tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644);
275 if (!db) {
276 DEBUG(0, ("Unable to open idmap database\n"));
277 ret = NT_STATUS_UNSUCCESSFUL;
278 goto done;
279 }
280
281 /* check against earlier versions */
282 version = dbwrap_fetch_int32(db, "IDMAP_VERSION");
283 if (version != IDMAP_VERSION) {
284 if (config_error) {
285 DEBUG(0,("Upgrade of IDMAP_VERSION from %d to %d is not "
286 "possible with incomplete configuration\n",
287 version, IDMAP_VERSION));
288 ret = NT_STATUS_UNSUCCESSFUL;
289 goto done;
290 }
291 if (db->transaction_start(db) != 0) {
292 DEBUG(0, ("Unable to start upgrade transaction!\n"));
293 ret = NT_STATUS_INTERNAL_DB_ERROR;
294 goto done;
295 }
296
297 if (!idmap_tdb_upgrade(db)) {
298 db->transaction_cancel(db);
299 DEBUG(0, ("Unable to open idmap database, it's in an old format, and upgrade failed!\n"));
300 ret = NT_STATUS_INTERNAL_DB_ERROR;
301 goto done;
302 }
303
304 if (db->transaction_commit(db) != 0) {
305 DEBUG(0, ("Unable to commit upgrade transaction!\n"));
306 ret = NT_STATUS_INTERNAL_DB_ERROR;
307 goto done;
308 }
309 }
310
311 *dbctx = talloc_move(memctx, &db);
312 ret = NT_STATUS_OK;
313
314 done:
315 talloc_free(ctx);
316 return ret;
317 }
318
319 /**********************************************************************
320 IDMAP ALLOC TDB BACKEND
321 **********************************************************************/
322
323 static struct db_context *idmap_alloc_db;
324
325 /**********************************
326 Initialise idmap alloc database.
327 **********************************/
328
329 static NTSTATUS idmap_tdb_alloc_init( const char *params )
330 {
331 int ret;
332 NTSTATUS status;
333 uint32_t low_uid;
334 uint32_t low_gid;
335 bool update_uid = false;
336 bool update_gid = false;
337
338 status = idmap_tdb_open_db(NULL, true, &idmap_alloc_db);
339 if (!NT_STATUS_IS_OK(status)) {
340 DEBUG(0, ("idmap will be unable to map foreign SIDs: %s\n",
341 nt_errstr(status)));
342 return status;
343 }
344
345 low_uid = dbwrap_fetch_int32(idmap_alloc_db, HWM_USER);
346 if (low_uid == -1 || low_uid < idmap_tdb_state.low_uid) {
347 update_uid = true;
348 }
349
350 low_gid = dbwrap_fetch_int32(idmap_alloc_db, HWM_GROUP);
351 if (low_gid == -1 || low_gid < idmap_tdb_state.low_gid) {
352 update_gid = true;
353 }
354
355 if (!update_uid && !update_gid) {
356 return NT_STATUS_OK;
357 }
358
359 if (idmap_alloc_db->transaction_start(idmap_alloc_db) != 0) {
360 TALLOC_FREE(idmap_alloc_db);
361 DEBUG(0, ("Unable to start upgrade transaction!\n"));
362 return NT_STATUS_INTERNAL_DB_ERROR;
363 }
364
365 if (update_uid) {
366 ret = dbwrap_store_int32(idmap_alloc_db, HWM_USER,
367 idmap_tdb_state.low_uid);
368 if (ret == -1) {
369 idmap_alloc_db->transaction_cancel(idmap_alloc_db);
370 TALLOC_FREE(idmap_alloc_db);
371 DEBUG(0, ("Unable to initialise user hwm in idmap "
372 "database\n"));
373 return NT_STATUS_INTERNAL_DB_ERROR;
374 }
375 }
376
377 if (update_gid) {
378 ret = dbwrap_store_int32(idmap_alloc_db, HWM_GROUP,
379 idmap_tdb_state.low_gid);
380 if (ret == -1) {
381 idmap_alloc_db->transaction_cancel(idmap_alloc_db);
382 TALLOC_FREE(idmap_alloc_db);
383 DEBUG(0, ("Unable to initialise group hwm in idmap "
384 "database\n"));
385 return NT_STATUS_INTERNAL_DB_ERROR;
386 }
387 }
388
389 if (idmap_alloc_db->transaction_commit(idmap_alloc_db) != 0) {
390 TALLOC_FREE(idmap_alloc_db);
391 DEBUG(0, ("Unable to commit upgrade transaction!\n"));
392 return NT_STATUS_INTERNAL_DB_ERROR;
393 }
394
395 return NT_STATUS_OK;
396 }
397
398 /**********************************
399 Allocate a new id.
400 **********************************/
401
402 static NTSTATUS idmap_tdb_allocate_id(struct unixid *xid)
403 {
404 NTSTATUS ret;
405 const char *hwmkey;
406 const char *hwmtype;
407 uint32_t high_hwm;
408 uint32_t hwm;
409 int res;
410
411 /* Get current high water mark */
412 switch (xid->type) {
413
414 case ID_TYPE_UID:
415 hwmkey = HWM_USER;
416 hwmtype = "UID";
417 high_hwm = idmap_tdb_state.high_uid;
418 break;
419
420 case ID_TYPE_GID:
421 hwmkey = HWM_GROUP;
422 hwmtype = "GID";
423 high_hwm = idmap_tdb_state.high_gid;
424 break;
425
426 default:
427 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
428 return NT_STATUS_INVALID_PARAMETER;
429 }
430
431 res = idmap_alloc_db->transaction_start(idmap_alloc_db);
432 if (res != 0) {
433 DEBUG(1, (__location__ " Failed to start transaction.\n"));
434 return NT_STATUS_UNSUCCESSFUL;
435 }
436
437 if ((hwm = dbwrap_fetch_int32(idmap_alloc_db, hwmkey)) == -1) {
438 idmap_alloc_db->transaction_cancel(idmap_alloc_db);
439 return NT_STATUS_INTERNAL_DB_ERROR;
440 }
441
442 /* check it is in the range */
443 if (hwm > high_hwm) {
444 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
445 hwmtype, (unsigned long)high_hwm));
446 idmap_alloc_db->transaction_cancel(idmap_alloc_db);
447 return NT_STATUS_UNSUCCESSFUL;
448 }
449
450 /* fetch a new id and increment it */
451 ret = dbwrap_change_uint32_atomic(idmap_alloc_db, hwmkey, &hwm, 1);
452 if (!NT_STATUS_IS_OK(ret)) {
453 DEBUG(0, ("Fatal error while fetching a new %s value: %s\n!",
454 hwmtype, nt_errstr(ret)));
455 idmap_alloc_db->transaction_cancel(idmap_alloc_db);
456 return ret;
457 }
458
459 /* recheck it is in the range */
460 if (hwm > high_hwm) {
461 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
462 hwmtype, (unsigned long)high_hwm));
463 idmap_alloc_db->transaction_cancel(idmap_alloc_db);
464 return NT_STATUS_UNSUCCESSFUL;
465 }
466
467 res = idmap_alloc_db->transaction_commit(idmap_alloc_db);
468 if (res != 0) {
469 DEBUG(1, (__location__ " Failed to commit transaction.\n"));
470 return NT_STATUS_UNSUCCESSFUL;
471 }
472
473 xid->id = hwm;
474 DEBUG(10,("New %s = %d\n", hwmtype, hwm));
475
476 return NT_STATUS_OK;
477 }
478
479 /**********************************
480 Get current highest id.
481 **********************************/
482
483 static NTSTATUS idmap_tdb_get_hwm(struct unixid *xid)
484 {
485 const char *hwmkey;
486 const char *hwmtype;
487 uint32_t hwm;
488 uint32_t high_hwm;
489
490 /* Get current high water mark */
491 switch (xid->type) {
492
493 case ID_TYPE_UID:
494 hwmkey = HWM_USER;
495 hwmtype = "UID";
496 high_hwm = idmap_tdb_state.high_uid;
497 break;
498
499 case ID_TYPE_GID:
500 hwmkey = HWM_GROUP;
501 hwmtype = "GID";
502 high_hwm = idmap_tdb_state.high_gid;
503 break;
504
505 default:
506 return NT_STATUS_INVALID_PARAMETER;
507 }
508
509 if ((hwm = dbwrap_fetch_int32(idmap_alloc_db, hwmkey)) == -1) {
510 return NT_STATUS_INTERNAL_DB_ERROR;
511 }
512
513 xid->id = hwm;
514
515 /* Warn if it is out of range */
516 if (hwm >= high_hwm) {
517 DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
518 hwmtype, (unsigned long)high_hwm));
519 }
520
521 return NT_STATUS_OK;
522 }
523
524 /**********************************
525 Set high id.
526 **********************************/
527
528 static NTSTATUS idmap_tdb_set_hwm(struct unixid *xid)
529 {
530 const char *hwmkey;
531 const char *hwmtype;
532 uint32_t hwm;
533 uint32_t high_hwm;
534 NTSTATUS ret;
535
536 /* Get current high water mark */
537 switch (xid->type) {
538
539 case ID_TYPE_UID:
540 hwmkey = HWM_USER;
541 hwmtype = "UID";
542 high_hwm = idmap_tdb_state.high_uid;
543 break;
544
545 case ID_TYPE_GID:
546 hwmkey = HWM_GROUP;
547 hwmtype = "GID";
548 high_hwm = idmap_tdb_state.high_gid;
549 break;
550
551 default:
552 return NT_STATUS_INVALID_PARAMETER;
553 }
554
555 hwm = xid->id;
556
557 /* Warn if it is out of range */
558 if (hwm >= high_hwm) {
559 DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
560 hwmtype, (unsigned long)high_hwm));
561 }
562
563 ret = dbwrap_trans_store_uint32(idmap_alloc_db, hwmkey, hwm);
564
565 return ret;
566 }
567
568 /**********************************
569 Close the alloc tdb
570 **********************************/
571
572 static NTSTATUS idmap_tdb_alloc_close(void)
573 {
574 TALLOC_FREE(idmap_alloc_db);
575 return NT_STATUS_OK;
576 }
577
578 /**********************************************************************
579 IDMAP MAPPING TDB BACKEND
580 **********************************************************************/
581
582 struct idmap_tdb_context {
583 struct db_context *db;
584 uint32_t filter_low_id;
585 uint32_t filter_high_id;
586 };
587
588 /*****************************
589 Initialise idmap database.
590 *****************************/
591
592 static NTSTATUS idmap_tdb_db_init(struct idmap_domain *dom, const char *params)
593 {
594 NTSTATUS ret;
595 struct idmap_tdb_context *ctx;
596
597 DEBUG(10, ("idmap_tdb_db_init called for domain '%s'\n", dom->name));
598
599 ctx = talloc(dom, struct idmap_tdb_context);
600 if ( ! ctx) {
601 DEBUG(0, ("Out of memory!\n"));
602 return NT_STATUS_NO_MEMORY;
603 }
604
605 if (strequal(dom->name, "*")) {
606 uid_t low_uid = 0;
607 uid_t high_uid = 0;
608 gid_t low_gid = 0;
609 gid_t high_gid = 0;
610
611 ctx->filter_low_id = 0;
612 ctx->filter_high_id = 0;
613
614 if (lp_idmap_uid(&low_uid, &high_uid)) {
615 ctx->filter_low_id = low_uid;
616 ctx->filter_high_id = high_uid;
617 } else {
618 DEBUG(3, ("Warning: 'idmap uid' not set!\n"));
619 }
620
621 if (lp_idmap_gid(&low_gid, &high_gid)) {
622 if ((low_gid != low_uid) || (high_gid != high_uid)) {
623 DEBUG(1, ("Warning: 'idmap uid' and 'idmap gid'"
624 " ranges do not agree -- building "
625 "intersection\n"));
626 ctx->filter_low_id = MAX(ctx->filter_low_id,
627 low_gid);
628 ctx->filter_high_id = MIN(ctx->filter_high_id,
629 high_gid);
630 }
631 } else {
632 DEBUG(3, ("Warning: 'idmap gid' not set!\n"));
633 }
634 } else {
635 char *config_option = NULL;
636 const char *range;
637
638 config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
639 if ( ! config_option) {
640 DEBUG(0, ("Out of memory!\n"));
641 ret = NT_STATUS_NO_MEMORY;
642 goto failed;
643 }
644
645 range = lp_parm_const_string(-1, config_option, "range", NULL);
646 if (( ! range) ||
647 (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2))
648 {
649 ctx->filter_low_id = 0;
650 ctx->filter_high_id = 0;
651 }
652
653 talloc_free(config_option);
654 }
655
656 if (ctx->filter_low_id > ctx->filter_high_id) {
657 ctx->filter_low_id = 0;
658 ctx->filter_high_id = 0;
659 }
660
661 DEBUG(10, ("idmap_tdb_db_init: filter range %u-%u loaded for domain "
662 "'%s'\n", ctx->filter_low_id, ctx->filter_high_id, dom->name));
663
664 ret = idmap_tdb_open_db(ctx, false, &ctx->db);
665 if ( ! NT_STATUS_IS_OK(ret)) {
666 goto failed;
667 }
668
669 dom->private_data = ctx;
670
671 return NT_STATUS_OK;
672
673 failed:
674 talloc_free(ctx);
675 return ret;
676 }
677
678 /**********************************
679 Single id to sid lookup function.
680 **********************************/
681
682 static NTSTATUS idmap_tdb_id_to_sid(struct idmap_tdb_context *ctx, struct id_map *map)
683 {
684 NTSTATUS ret;
685 TDB_DATA data;
686 char *keystr;
687
688 if (!ctx || !map) {
689 return NT_STATUS_INVALID_PARAMETER;
690 }
691
692 /* apply filters before checking */
693 if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
694 (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
695 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
696 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
697 return NT_STATUS_NONE_MAPPED;
698 }
699
700 switch (map->xid.type) {
701
702 case ID_TYPE_UID:
703 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
704 break;
705
706 case ID_TYPE_GID:
707 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
708 break;
709
710 default:
711 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
712 return NT_STATUS_INVALID_PARAMETER;
713 }
714
715 /* final SAFE_FREE safe */
716 data.dptr = NULL;
717
718 if (keystr == NULL) {
719 DEBUG(0, ("Out of memory!\n"));
720 ret = NT_STATUS_NO_MEMORY;
721 goto done;
722 }
723
724 DEBUG(10,("Fetching record %s\n", keystr));
725
726 /* Check if the mapping exists */
727 data = dbwrap_fetch_bystring(ctx->db, NULL, keystr);
728
729 if (!data.dptr) {
730 DEBUG(10,("Record %s not found\n", keystr));
731 ret = NT_STATUS_NONE_MAPPED;
732 goto done;
733 }
734
735 if (!string_to_sid(map->sid, (const char *)data.dptr)) {
736 DEBUG(10,("INVALID SID (%s) in record %s\n",
737 (const char *)data.dptr, keystr));
738 ret = NT_STATUS_INTERNAL_DB_ERROR;
739 goto done;
740 }
741
742 DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
743 ret = NT_STATUS_OK;
744
745 done:
746 talloc_free(data.dptr);
747 talloc_free(keystr);
748 return ret;
749 }
750
751 /**********************************
752 Single sid to id lookup function.
753 **********************************/
754
755 static NTSTATUS idmap_tdb_sid_to_id(struct idmap_tdb_context *ctx, struct id_map *map)
756 {
757 NTSTATUS ret;
758 TDB_DATA data;
759 char *keystr;
760 unsigned long rec_id = 0;
761 TALLOC_CTX *tmp_ctx = talloc_stackframe();
762
763 keystr = sid_string_talloc(tmp_ctx, map->sid);
764 if (keystr == NULL) {
765 DEBUG(0, ("Out of memory!\n"));
766 ret = NT_STATUS_NO_MEMORY;
767 goto done;
768 }
769
770 DEBUG(10,("Fetching record %s\n", keystr));
771
772 /* Check if sid is present in database */
773 data = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr);
774 if (!data.dptr) {
775 DEBUG(10,("Record %s not found\n", keystr));
776 ret = NT_STATUS_NONE_MAPPED;
777 goto done;
778 }
779
780 /* What type of record is this ? */
781 if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
782 map->xid.id = rec_id;
783 map->xid.type = ID_TYPE_UID;
784 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
785 ret = NT_STATUS_OK;
786
787 } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
788 map->xid.id = rec_id;
789 map->xid.type = ID_TYPE_GID;
790 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
791 ret = NT_STATUS_OK;
792
793 } else { /* Unknown record type ! */
794 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
795 ret = NT_STATUS_INTERNAL_DB_ERROR;
796 }
797
798 /* apply filters before returning result */
799 if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
800 (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
801 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
802 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
803 ret = NT_STATUS_NONE_MAPPED;
804 }
805
806 done:
807 talloc_free(tmp_ctx);
808 return ret;
809 }
810
811 /**********************************
812 lookup a set of unix ids.
813 **********************************/
814
815 static NTSTATUS idmap_tdb_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
816 {
817 struct idmap_tdb_context *ctx;
818 NTSTATUS ret;
819 int i;
820
821 /* initialize the status to avoid suprise */
822 for (i = 0; ids[i]; i++) {
823 ids[i]->status = ID_UNKNOWN;
824 }
825
826 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
827
828 for (i = 0; ids[i]; i++) {
829 ret = idmap_tdb_id_to_sid(ctx, ids[i]);
830 if ( ! NT_STATUS_IS_OK(ret)) {
831
832 /* if it is just a failed mapping continue */
833 if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
834
835 /* make sure it is marked as unmapped */
836 ids[i]->status = ID_UNMAPPED;
837 continue;
838 }
839
840 /* some fatal error occurred, return immediately */
841 goto done;
842 }
843
844 /* all ok, id is mapped */
845 ids[i]->status = ID_MAPPED;
846 }
847
848 ret = NT_STATUS_OK;
849
850 done:
851 return ret;
852 }
853
854 /**********************************
855 lookup a set of sids.
856 **********************************/
857
858 static NTSTATUS idmap_tdb_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
859 {
860 struct idmap_tdb_context *ctx;
861 NTSTATUS ret;
862 int i;
863
864 /* initialize the status to avoid suprise */
865 for (i = 0; ids[i]; i++) {
866 ids[i]->status = ID_UNKNOWN;
867 }
868
869 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
870
871 for (i = 0; ids[i]; i++) {
872 ret = idmap_tdb_sid_to_id(ctx, ids[i]);
873 if ( ! NT_STATUS_IS_OK(ret)) {
874
875 /* if it is just a failed mapping continue */
876 if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
877
878 /* make sure it is marked as unmapped */
879 ids[i]->status = ID_UNMAPPED;
880 continue;
881 }
882
883 /* some fatal error occurred, return immediately */
884 goto done;
885 }
886
887 /* all ok, id is mapped */
888 ids[i]->status = ID_MAPPED;
889 }
890
891 ret = NT_STATUS_OK;
892
893 done:
894 return ret;
895 }
896
897 /**********************************
898 set a mapping.
899 **********************************/
900
901 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
902 const struct id_map *map)
903 {
904 struct idmap_tdb_context *ctx;
905 NTSTATUS ret;
906 TDB_DATA ksid, kid;
907 char *ksidstr, *kidstr;
908 fstring tmp;
909
910 if (!map || !map->sid) {
911 return NT_STATUS_INVALID_PARAMETER;
912 }
913
914 ksidstr = kidstr = NULL;
915
916 /* TODO: should we filter a set_mapping using low/high filters ? */
917
918 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
919
920 switch (map->xid.type) {
921
922 case ID_TYPE_UID:
923 kidstr = talloc_asprintf(ctx, "UID %lu",
924 (unsigned long)map->xid.id);
925 break;
926
927 case ID_TYPE_GID:
928 kidstr = talloc_asprintf(ctx, "GID %lu",
929 (unsigned long)map->xid.id);
930 break;
931
932 default:
933 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
934 return NT_STATUS_INVALID_PARAMETER;
935 }
936
937 if (kidstr == NULL) {
938 DEBUG(0, ("ERROR: Out of memory!\n"));
939 ret = NT_STATUS_NO_MEMORY;
940 goto done;
941 }
942
943 if ((ksidstr = talloc_asprintf(
944 ctx, "%s", sid_to_fstring(tmp, map->sid))) == NULL) {
945 DEBUG(0, ("Out of memory!\n"));
946 ret = NT_STATUS_NO_MEMORY;
947 goto done;
948 }
949
950 DEBUG(10, ("Storing %s <-> %s map\n", ksidstr, kidstr));
951 kid = string_term_tdb_data(kidstr);
952 ksid = string_term_tdb_data(ksidstr);
953
954 if (ctx->db->transaction_start(ctx->db) != 0) {
955 DEBUG(0, ("Failed to start transaction for %s\n",
956 ksidstr));
957 ret = NT_STATUS_INTERNAL_DB_ERROR;
958 goto done;
959 }
960
961 ret = dbwrap_store(ctx->db, ksid, kid, TDB_REPLACE);
962 if (!NT_STATUS_IS_OK(ret)) {
963 ctx->db->transaction_cancel(ctx->db);
964 DEBUG(0, ("Error storing SID -> ID (%s -> %s): %s\n",
965 ksidstr, kidstr, nt_errstr(ret)));
966 goto done;
967 }
968 ret = dbwrap_store(ctx->db, kid, ksid, TDB_REPLACE);
969 if (!NT_STATUS_IS_OK(ret)) {
970 ctx->db->transaction_cancel(ctx->db);
971 DEBUG(0, ("Error storing ID -> SID (%s -> %s): %s\n",
972 kidstr, ksidstr, nt_errstr(ret)));
973 goto done;
974 }
975
976 if (ctx->db->transaction_commit(ctx->db) != 0) {
977 DEBUG(0, ("Failed to commit transaction for (%s -> %s)\n",
978 ksidstr, kidstr));
979 ret = NT_STATUS_INTERNAL_DB_ERROR;
980 goto done;
981 }
982
983 DEBUG(10,("Stored %s <-> %s\n", ksidstr, kidstr));
984 ret = NT_STATUS_OK;
985
986 done:
987 talloc_free(ksidstr);
988 talloc_free(kidstr);
989 return ret;
990 }
991
992 /**********************************
993 remove a mapping.
994 **********************************/
995
996 static NTSTATUS idmap_tdb_remove_mapping(struct idmap_domain *dom,
997 const struct id_map *map)
998 {
999 struct idmap_tdb_context *ctx;
1000 NTSTATUS ret;
1001 TDB_DATA ksid, kid, data;
1002 char *ksidstr, *kidstr;
1003 fstring tmp;
1004
1005 if (!map || !map->sid) {
1006 return NT_STATUS_INVALID_PARAMETER;
1007 }
1008
1009 ksidstr = kidstr = NULL;
1010 data.dptr = NULL;
1011
1012 /* TODO: should we filter a remove_mapping using low/high filters ? */
1013
1014 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
1015
1016 switch (map->xid.type) {
1017
1018 case ID_TYPE_UID:
1019 kidstr = talloc_asprintf(ctx, "UID %lu",
1020 (unsigned long)map->xid.id);
1021 break;
1022
1023 case ID_TYPE_GID:
1024 kidstr = talloc_asprintf(ctx, "GID %lu",
1025 (unsigned long)map->xid.id);
1026 break;
1027
1028 default:
1029 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
1030 return NT_STATUS_INVALID_PARAMETER;
1031 }
1032
1033 if (kidstr == NULL) {
1034 DEBUG(0, ("ERROR: Out of memory!\n"));
1035 ret = NT_STATUS_NO_MEMORY;
1036 goto done;
1037 }
1038
1039 if ((ksidstr = talloc_asprintf(
1040 ctx, "%s", sid_to_fstring(tmp, map->sid))) == NULL) {
1041 DEBUG(0, ("Out of memory!\n"));
1042 ret = NT_STATUS_NO_MEMORY;
1043 goto done;
1044 }
1045
1046 DEBUG(10, ("Checking %s <-> %s map\n", ksidstr, kidstr));
1047 ksid = string_term_tdb_data(ksidstr);
1048 kid = string_term_tdb_data(kidstr);
1049
1050 if (ctx->db->transaction_start(ctx->db) != 0) {
1051 DEBUG(0, ("Failed to start transaction for %s\n",
1052 ksidstr));
1053 return NT_STATUS_INTERNAL_DB_ERROR;
1054 }
1055
1056 /* Check if sid is present in database */
1057 data = dbwrap_fetch(ctx->db, NULL, ksid);
1058 if (!data.dptr) {
1059 ctx->db->transaction_cancel(ctx->db);
1060 DEBUG(10,("Record %s not found\n", ksidstr));
1061 ret = NT_STATUS_NONE_MAPPED;
1062 goto done;
1063 }
1064
1065 /* Check if sid is mapped to the specified ID */
1066 if ((data.dsize != kid.dsize) ||
1067 (memcmp(data.dptr, kid.dptr, data.dsize) != 0)) {
1068 ctx->db->transaction_cancel(ctx->db);
1069 DEBUG(10,("Specified SID does not map to specified ID\n"));
1070 DEBUGADD(10,("Actual mapping is %s -> %s\n", ksidstr,
1071 (const char *)data.dptr));
1072 ret = NT_STATUS_NONE_MAPPED;
1073 goto done;
1074 }
1075
1076 DEBUG(10, ("Removing %s <-> %s map\n", ksidstr, kidstr));
1077
1078 /* Delete previous mappings. */
1079
1080 DEBUG(10, ("Deleting existing mapping %s -> %s\n", ksidstr, kidstr ));
1081 ret = dbwrap_delete(ctx->db, ksid);
1082 if (!NT_STATUS_IS_OK(ret)) {
1083 DEBUG(0,("Warning: Failed to delete %s: %s\n",
1084 ksidstr, nt_errstr(ret)));
1085 }
1086
1087 DEBUG(10,("Deleting existing mapping %s -> %s\n", kidstr, ksidstr ));
1088 ret = dbwrap_delete(ctx->db, kid);
1089 if (!NT_STATUS_IS_OK(ret)) {
1090 DEBUG(0,("Warning: Failed to delete %s: %s\n",
1091 kidstr, nt_errstr(ret)));
1092 }
1093
1094 if (ctx->db->transaction_commit(ctx->db) != 0) {
1095 DEBUG(0, ("Failed to commit transaction for (%s -> %s)\n",
1096 ksidstr, kidstr));
1097 ret = NT_STATUS_INTERNAL_DB_ERROR;
1098 goto done;
1099 }
1100
1101 ret = NT_STATUS_OK;
1102
1103 done:
1104 talloc_free(ksidstr);
1105 talloc_free(kidstr);
1106 talloc_free(data.dptr);
1107 return ret;
1108 }
1109
1110 /**********************************
1111 Close the idmap tdb instance
1112 **********************************/
1113
1114 static NTSTATUS idmap_tdb_close(struct idmap_domain *dom)
1115 {
1116 struct idmap_tdb_context *ctx;
1117
1118 if (dom->private_data) {
1119 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
1120
1121 TALLOC_FREE(ctx->db);
1122 }
1123 return NT_STATUS_OK;
1124 }
1125
1126 struct dump_data {
1127 TALLOC_CTX *memctx;
1128 struct id_map **maps;
1129 int *num_maps;
1130 NTSTATUS ret;
1131 };
1132
1133 static int idmap_tdb_dump_one_entry(struct db_record *rec, void *pdata)
1134 {
1135 struct dump_data *data = talloc_get_type(pdata, struct dump_data);
1136 struct id_map *maps;
1137 int num_maps = *data->num_maps;
1138
1139 /* ignore any record but the ones with a SID as key */
1140 if (strncmp((const char *)rec->key.dptr, "S-", 2) == 0) {
1141
1142 maps = talloc_realloc(NULL, *data->maps, struct id_map, num_maps+1);
1143 if ( ! maps) {
1144 DEBUG(0, ("Out of memory!\n"));
1145 data->ret = NT_STATUS_NO_MEMORY;
1146 return -1;
1147 }
1148 *data->maps = maps;
1149 maps[num_maps].sid = talloc(maps, DOM_SID);
1150 if ( ! maps[num_maps].sid) {
1151 DEBUG(0, ("Out of memory!\n"));
1152 data->ret = NT_STATUS_NO_MEMORY;
1153 return -1;
1154 }
1155
1156 if (!string_to_sid(maps[num_maps].sid, (const char *)rec->key.dptr)) {
1157 DEBUG(10,("INVALID record %s\n", (const char *)rec->key.dptr));
1158 /* continue even with errors */
1159 return 0;
1160 }
1161
1162 /* Try a UID record. */
1163 if (sscanf((const char *)rec->value.dptr, "UID %u", &(maps[num_maps].xid.id)) == 1) {
1164 maps[num_maps].xid.type = ID_TYPE_UID;
1165 maps[num_maps].status = ID_MAPPED;
1166 *data->num_maps = num_maps + 1;
1167
1168 /* Try a GID record. */
1169 } else
1170 if (sscanf((const char *)rec->value.dptr, "GID %u", &(maps[num_maps].xid.id)) == 1) {
1171 maps[num_maps].xid.type = ID_TYPE_GID;
1172 maps[num_maps].status = ID_MAPPED;
1173 *data->num_maps = num_maps + 1;
1174
1175 /* Unknown record type ! */
1176 } else {
1177 maps[num_maps].status = ID_UNKNOWN;
1178 DEBUG(2, ("Found INVALID record %s -> %s\n",
1179 (const char *)rec->key.dptr,
1180 (const char *)rec->value.dptr));
1181 /* do not increment num_maps */
1182 }
1183 }
1184
1185 return 0;
1186 }
1187
1188 /**********************************
1189 Dump all mappings out
1190 **********************************/
1191
1192 static NTSTATUS idmap_tdb_dump_data(struct idmap_domain *dom, struct id_map **maps, int *num_maps)
1193 {
1194 struct idmap_tdb_context *ctx;
1195 struct dump_data *data;
1196 NTSTATUS ret = NT_STATUS_OK;
1197
1198 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
1199
1200 data = TALLOC_ZERO_P(ctx, struct dump_data);
1201 if ( ! data) {
1202 DEBUG(0, ("Out of memory!\n"));
1203 return NT_STATUS_NO_MEMORY;
1204 }
1205 data->maps = maps;
1206 data->num_maps = num_maps;
1207 data->ret = NT_STATUS_OK;
1208
1209 ctx->db->traverse_read(ctx->db, idmap_tdb_dump_one_entry, data);
1210
1211 if ( ! NT_STATUS_IS_OK(data->ret)) {
1212 ret = data->ret;
1213 }
1214
1215 talloc_free(data);
1216 return ret;
1217 }
1218
1219 static struct idmap_methods db_methods = {
1220
1221 .init = idmap_tdb_db_init,
1222 .unixids_to_sids = idmap_tdb_unixids_to_sids,
1223 .sids_to_unixids = idmap_tdb_sids_to_unixids,
1224 .set_mapping = idmap_tdb_set_mapping,
1225 .remove_mapping = idmap_tdb_remove_mapping,
1226 .dump_data = idmap_tdb_dump_data,
1227 .close_fn = idmap_tdb_close
1228 };
1229
1230 static struct idmap_alloc_methods db_alloc_methods = {
1231
1232 .init = idmap_tdb_alloc_init,
1233 .allocate_id = idmap_tdb_allocate_id,
1234 .get_id_hwm = idmap_tdb_get_hwm,
1235 .set_id_hwm = idmap_tdb_set_hwm,
1236 .close_fn = idmap_tdb_alloc_close
1237 };
1238
1239 NTSTATUS idmap_alloc_tdb_init(void)
1240 {
1241 return smb_register_idmap_alloc(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_alloc_methods);
1242 }
1243
1244 NTSTATUS idmap_tdb_init(void)
1245 {
1246 NTSTATUS ret;
1247
1248 DEBUG(10, ("calling idmap_tdb_init\n"));
1249
1250 /* FIXME: bad hack to actually register also the alloc_tdb module without changining configure.in */
1251 ret = idmap_alloc_tdb_init();
1252 if (! NT_STATUS_IS_OK(ret)) {
1253 return ret;
1254 }
1255 return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_methods);
1256 }
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