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whitespace: auth_log.py python conventions
[Samba.git] / source3 / winbindd / idmap_autorid.c
blob9793bfe5472e06ab877d6d357f27825f5c660ea7
1 /*
2 * idmap_autorid: static map between Active Directory/NT RIDs
3 * and RFC 2307 accounts
4 *
5 * based on the idmap_rid module, but this module defines the ranges
6 * for the domains by automatically allocating a range for each domain
7 *
8 * Copyright (C) Christian Ambach, 2010-2012
9 *
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 3 of the License, or
13 * (at your option) any later version.
14 *
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.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, see <http://www.gnu.org/licenses/>.
22 *
23 */
24
25 /*
26 * This module allocates ranges for domains to be used in a
27 * algorithmic mode like idmap_rid. Multiple ranges are supported
28 * for a single domain: If a rid exceeds the range size, a matching
29 * range is allocated to hold the rid's id.
30 *
31 * Here are the formulas applied:
32 *
33 *
34 * For a sid of the form domain_sid-rid, we have
35 *
36 * rid = reduced_rid + domain_range_index * range_size
37 *
38 * with
39 * reduced_rid := rid % range_size
40 * domain_range_index := rid / range_size
41 *
42 * And reduced_rid fits into a range.
43 *
44 * In the database, we associate a range_number to
45 * the pair domain_sid,domain_range_index.
46 *
47 * Now the unix id for the given sid calculates as:
48 *
49 * id = reduced_rid + range_low_id
50 *
51 * with
52 *
53 * range_low_id = low_id + range_number * range_size
54 *
55 *
56 * The inverse calculation goes like this:
57 *
58 * Given a unix id, let
59 *
60 * normalized_id := id - low_id
61 * reduced_rid := normalized_id % range_size
62 * range_number = normalized_id / range_size
63 *
64 * Then we have
65 *
66 * id = reduced_rid + low_id + range_number * range_size
67 *
68 * From the database, get the domain_sid,domain_range_index pair
69 * belonging to the range_number (if there is already one).
70 *
71 * Then the rid for the unix id calculates as:
72 *
73 * rid = reduced_rid + domain_range_index * range_size
74 */
75
76 #include "idmap_autorid_tdb.h"
77 #include "winbindd.h"
78 #include "idmap.h"
79 #include "idmap_rw.h"
80 #include "../libcli/security/dom_sid.h"
81 #include "libsmb/samlogon_cache.h"
82 #include "passdb/machine_sid.h"
83
84 #undef DBGC_CLASS
85 #define DBGC_CLASS DBGC_IDMAP
86
87 #define IDMAP_AUTORID_ALLOC_RESERVED 500
88
89 /* handle to the tdb storing domain <-> range assignments */
90 static struct db_context *autorid_db;
91
92 static bool ignore_builtin = false;
93
94 static NTSTATUS idmap_autorid_get_alloc_range(struct idmap_domain *dom,
95 struct autorid_range_config *range)
96 {
97 NTSTATUS status;
98
99 ZERO_STRUCT(*range);
100
101 fstrcpy(range->domsid, ALLOC_RANGE);
102
103 status = idmap_autorid_get_domainrange(autorid_db,
104 range,
105 dom->read_only);
106
107 return status;
108 }
109
110 static NTSTATUS idmap_autorid_allocate_id(struct idmap_domain *dom,
111 struct unixid *xid) {
112
113 NTSTATUS ret;
114 struct autorid_range_config range;
115
116 if (dom->read_only) {
117 DEBUG(3, ("Backend is read-only, refusing "
118 "new allocation request\n"));
119 return NT_STATUS_UNSUCCESSFUL;
120 }
121
122 /* fetch the range for the allocation pool */
123
124 ret = idmap_autorid_get_alloc_range(dom, &range);
125 if (!NT_STATUS_IS_OK(ret)) {
126 DEBUG(3, ("Could not determine range for allocation pool, "
127 "check previous messages for reason\n"));
128 return ret;
129 }
130
131 ret = idmap_tdb_common_get_new_id(dom, xid);
132
133 if (!NT_STATUS_IS_OK(ret)) {
134 DEBUG(1, ("Fatal error while allocating new ID!\n"));
135 return ret;
136 }
137
138 xid->id = xid->id + range.low_id;
139
140 DEBUG(10, ("Returned new %s %d from allocation range\n",
141 (xid->type==ID_TYPE_UID)?"uid":"gid", xid->id));
142
143 return ret;
144 }
145
146 /*
147 * map a xid to SID using the idmap_tdb like pool
148 */
149 static NTSTATUS idmap_autorid_id_to_sid_alloc(struct idmap_domain *dom,
150 struct id_map *map)
151 {
152 NTSTATUS ret;
153
154 /* look out for the mapping */
155 ret = idmap_tdb_common_unixid_to_sid(dom, map);
156
157 if (NT_STATUS_IS_OK(ret)) {
158 map->status = ID_MAPPED;
159 return ret;
160 }
161
162 map->status = ID_UNKNOWN;
163
164 DEBUG(10, ("no ID->SID mapping for %d could be found\n", map->xid.id));
165
166 return ret;
167 }
168
169 static NTSTATUS idmap_autorid_id_to_sid(struct autorid_global_config *cfg,
170 struct idmap_domain *dom,
171 struct id_map *map)
172 {
173 uint32_t range_number;
174 uint32_t domain_range_index;
175 uint32_t normalized_id;
176 uint32_t reduced_rid;
177 uint32_t rid;
178 TDB_DATA data = tdb_null;
179 char *keystr;
180 struct dom_sid domsid;
181 NTSTATUS status;
182 bool ok;
183 const char *q = NULL;
184
185 /* can this be one of our ids? */
186 if (map->xid.id < cfg->minvalue) {
187 DEBUG(10, ("id %d is lower than minimum value, "
188 "ignoring mapping request\n", map->xid.id));
189 map->status = ID_UNKNOWN;
190 return NT_STATUS_OK;
191 }
192
193 if (map->xid.id > (cfg->minvalue + cfg->rangesize * cfg->maxranges)) {
194 DEBUG(10, ("id %d is outside of maximum id value, "
195 "ignoring mapping request\n", map->xid.id));
196 map->status = ID_UNKNOWN;
197 return NT_STATUS_OK;
198 }
199
200 /* determine the range of this uid */
201
202 normalized_id = map->xid.id - cfg->minvalue;
203 range_number = normalized_id / cfg->rangesize;
204
205 keystr = talloc_asprintf(talloc_tos(), "%u", range_number);
206 if (!keystr) {
207 return NT_STATUS_NO_MEMORY;
208 }
209
210 status = dbwrap_fetch_bystring(autorid_db, talloc_tos(), keystr, &data);
211 TALLOC_FREE(keystr);
212
213 if (!NT_STATUS_IS_OK(status)) {
214 DEBUG(4, ("id %d belongs to range %d which does not have "
215 "domain mapping, ignoring mapping request\n",
216 map->xid.id, range_number));
217 TALLOC_FREE(data.dptr);
218 map->status = ID_UNKNOWN;
219 return NT_STATUS_OK;
220 }
221
222 if ((data.dsize == 0) || (data.dptr[data.dsize-1] != '\0')) {
223 DBG_WARNING("Invalid range %"PRIu32"\n", range_number);
224 TALLOC_FREE(data.dptr);
225 map->status = ID_UNKNOWN;
226 return NT_STATUS_OK;
227 }
228
229 if (strncmp((const char *)data.dptr,
230 ALLOC_RANGE,
231 strlen(ALLOC_RANGE)) == 0) {
232 /*
233 * this is from the alloc range, check if there is a mapping
234 */
235 DEBUG(5, ("id %d belongs to allocation range, "
236 "checking for mapping\n",
237 map->xid.id));
238 TALLOC_FREE(data.dptr);
239 return idmap_autorid_id_to_sid_alloc(dom, map);
240 }
241
242 ok = dom_sid_parse_endp((const char *)data.dptr, &domsid, &q);
243 if (!ok) {
244 TALLOC_FREE(data.dptr);
245 map->status = ID_UNKNOWN;
246 return NT_STATUS_OK;
247 }
248
249 /*
250 * Allow for sid#range_index, just sid is range index 0
251 */
252
253 switch (*q) {
254 case '\0':
255 domain_range_index = 0;
256 break;
257 case '#':
258 if (sscanf(q+1, "%"SCNu32, &domain_range_index) == 1) {
259 break;
260 }
261 /* If we end up here, something weird is in the record. */
262
263 /* FALL THROUGH */
264 default:
265 DBG_DEBUG("SID/domain range: %s\n",
266 (const char *)data.dptr);
267 TALLOC_FREE(data.dptr);
268 map->status = ID_UNKNOWN;
269 return NT_STATUS_OK;
270 }
271
272 TALLOC_FREE(data.dptr);
273
274 reduced_rid = normalized_id % cfg->rangesize;
275 rid = reduced_rid + domain_range_index * cfg->rangesize;
276
277 sid_compose(map->sid, &domsid, rid);
278
279 /* We **really** should have some way of validating
280 the SID exists and is the correct type here. But
281 that is a deficiency in the idmap_rid design. */
282
283 map->status = ID_MAPPED;
284 map->xid.type = ID_TYPE_BOTH;
285
286 return NT_STATUS_OK;
287 }
288
289 /**********************************
290 Single sid to id lookup function.
291 **********************************/
292
293 static NTSTATUS idmap_autorid_sid_to_id_rid(
294 uint32_t rangesize,
295 uint32_t low_id,
296 struct id_map *map)
297 {
298 uint32_t rid;
299 uint32_t reduced_rid;
300
301 sid_peek_rid(map->sid, &rid);
302
303 reduced_rid = rid % rangesize;
304
305 map->xid.id = reduced_rid + low_id;
306 map->xid.type = ID_TYPE_BOTH;
307 map->status = ID_MAPPED;
308
309 return NT_STATUS_OK;
310 }
311
312 /**********************************
313 lookup a set of unix ids.
314 **********************************/
315
316 static NTSTATUS idmap_autorid_unixids_to_sids(struct idmap_domain *dom,
317 struct id_map **ids)
318 {
319 struct idmap_tdb_common_context *commoncfg;
320 struct autorid_global_config *globalcfg;
321 NTSTATUS ret;
322 int i;
323 int num_tomap = 0;
324 int num_mapped = 0;
325
326 /* initialize the status to avoid surprise */
327 for (i = 0; ids[i]; i++) {
328 ids[i]->status = ID_UNKNOWN;
329 num_tomap++;
330 }
331
332 commoncfg =
333 talloc_get_type_abort(dom->private_data,
334 struct idmap_tdb_common_context);
335
336 globalcfg = talloc_get_type(commoncfg->private_data,
337 struct autorid_global_config);
338
339 for (i = 0; ids[i]; i++) {
340
341 ret = idmap_autorid_id_to_sid(globalcfg, dom, ids[i]);
342
343 if ((!NT_STATUS_IS_OK(ret)) &&
344 (!NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED))) {
345 /* some fatal error occurred, log it */
346 DBG_NOTICE("Unexpected error resolving an ID "
347 "(%d): %s\n", ids[i]->xid.id,
348 nt_errstr(ret));
349 goto failure;
350 }
351
352 if (NT_STATUS_IS_OK(ret) && ids[i]->status == ID_MAPPED) {
353 num_mapped++;
354 }
355
356 }
357
358 if (num_tomap == num_mapped) {
359 return NT_STATUS_OK;
360 }
361 if (num_mapped == 0) {
362 return NT_STATUS_NONE_MAPPED;
363 }
364
365 return STATUS_SOME_UNMAPPED;
366
367
368 failure:
369 return ret;
370 }
371
372 static bool idmap_autorid_sid_is_special(struct dom_sid *sid)
373 {
374 bool match;
375
376 match = sid_check_is_in_wellknown_domain(sid);
377 if (match) {
378 return true;
379 }
380
381 return false;
382 }
383
384 static NTSTATUS idmap_autorid_sid_to_id_special(struct idmap_domain *dom,
385 struct id_map *map)
386 {
387 struct idmap_tdb_common_context *common =
388 talloc_get_type_abort(dom->private_data,
389 struct idmap_tdb_common_context);
390 uint32_t count;
391 struct autorid_range_config range;
392 NTSTATUS status;
393 uint32_t free_id;
394
395 status = idmap_autorid_get_alloc_range(dom, &range);
396 if (!NT_STATUS_IS_OK(status)) {
397 return status;
398 }
399
400 /* Take the next free ID, counting from the top */
401 free_id = 0;
402 for (count = 0; count < IDMAP_AUTORID_ALLOC_RESERVED; count++) {
403 struct id_map test_map;
404 struct dom_sid sid;
405
406 test_map.sid = &sid;
407 test_map.xid.type = map->xid.type;
408 test_map.xid.id = range.high_id - count;
409 test_map.status = ID_UNKNOWN;
410
411 status = idmap_tdb_common_unixid_to_sid(dom, &test_map);
412 if (NT_STATUS_EQUAL(NT_STATUS_NONE_MAPPED, status)) {
413 free_id = test_map.xid.id;
414 break;
415 }
416
417 if (!NT_STATUS_IS_OK(status)) {
418 /* error - get out */
419 return status;
420 }
421
422 /* mapping exists - try next ID */
423 }
424
425 if (free_id == 0) {
426 return NT_STATUS_NONE_MAPPED;
427 }
428
429 map->status = ID_MAPPED;
430 map->xid.id = free_id;
431
432 status = common->rw_ops->set_mapping(dom, map);
433 if (!NT_STATUS_IS_OK(status)) {
434 DEBUG(2, ("Error storing new mapping: %s\n",
435 nt_errstr(status)));
436 return status;
437 }
438
439 return NT_STATUS_OK;
440 }
441
442 struct idmap_autorid_sid_to_id_alloc_ctx {
443 struct idmap_domain *dom;
444 struct id_map *map;
445 };
446
447 static NTSTATUS idmap_autorid_sid_to_id_alloc_action(
448 struct db_context *db,
449 void *private_data)
450 {
451 struct idmap_autorid_sid_to_id_alloc_ctx *ctx;
452
453 ctx = (struct idmap_autorid_sid_to_id_alloc_ctx *)private_data;
454
455 if (idmap_autorid_sid_is_special(ctx->map->sid)) {
456 NTSTATUS ret;
457
458 ret = idmap_autorid_sid_to_id_special(ctx->dom, ctx->map);
459 if (NT_STATUS_IS_OK(ret)) {
460 return NT_STATUS_OK;
461 }
462 if (!NT_STATUS_EQUAL(NT_STATUS_NONE_MAPPED, ret)) {
463 return ret;
464 }
465
466 DEBUG(10, ("Sepecial sid %s not mapped. falling back to "
467 "regular allocation\n",
468 sid_string_dbg(ctx->map->sid)));
469 }
470
471 return idmap_tdb_common_new_mapping(ctx->dom, ctx->map);
472 }
473
474 /*
475 * map a SID to xid using the idmap_tdb like pool
476 */
477 static NTSTATUS idmap_autorid_sid_to_id_alloc(
478 struct idmap_tdb_common_context *ctx,
479 struct idmap_domain *dom,
480 struct id_map *map)
481 {
482 NTSTATUS ret;
483 struct idmap_autorid_sid_to_id_alloc_ctx alloc_ctx;
484
485 map->status = ID_UNKNOWN;
486
487 /* see if we already have a mapping */
488 ret = idmap_tdb_common_sid_to_unixid(dom, map);
489
490 if (NT_STATUS_IS_OK(ret)) {
491 map->status = ID_MAPPED;
492 return ret;
493 }
494
495 /* bad things happened */
496 if (!NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
497 DEBUG(1, ("Looking up SID->ID mapping for %s failed: %s\n",
498 sid_string_dbg(map->sid), nt_errstr(ret)));
499 return ret;
500 }
501
502 if (dom->read_only) {
503 DEBUG(3, ("Not allocating new mapping for %s, because backend "
504 "is read-only\n", sid_string_dbg(map->sid)));
505 map->status = ID_UNMAPPED;
506 return NT_STATUS_NONE_MAPPED;
507 }
508
509 DEBUG(10, ("Creating new mapping in pool for %s\n",
510 sid_string_dbg(map->sid)));
511
512 alloc_ctx.dom = dom;
513 alloc_ctx.map = map;
514
515 ret = dbwrap_trans_do(ctx->db, idmap_autorid_sid_to_id_alloc_action,
516 &alloc_ctx);
517 if (!NT_STATUS_IS_OK(ret)) {
518 DEBUG(1, ("Failed to create a new mapping in alloc range: %s\n",
519 nt_errstr(ret)));
520 return NT_STATUS_INTERNAL_DB_CORRUPTION;
521 }
522
523 map->status = ID_MAPPED;
524 return NT_STATUS_OK;
525 }
526
527 static bool idmap_autorid_domsid_is_for_alloc(struct dom_sid *sid)
528 {
529 bool match;
530
531 match = sid_check_is_wellknown_domain(sid, NULL);
532 if (match) {
533 return true;
534 }
535
536 return false;
537 }
538
539 static NTSTATUS idmap_autorid_sid_to_id(struct idmap_tdb_common_context *common,
540 struct idmap_domain *dom,
541 struct id_map *map)
542 {
543 struct autorid_global_config *global =
544 talloc_get_type_abort(common->private_data,
545 struct autorid_global_config);
546 struct autorid_range_config range;
547 uint32_t rid;
548 struct dom_sid domainsid;
549 NTSTATUS ret;
550
551 ZERO_STRUCT(range);
552 map->status = ID_UNKNOWN;
553
554 DEBUG(10, ("Trying to map %s\n", sid_string_dbg(map->sid)));
555
556 sid_copy(&domainsid, map->sid);
557 if (!sid_split_rid(&domainsid, &rid)) {
558 DEBUG(4, ("Could not determine domain SID from %s, "
559 "ignoring mapping request\n",
560 sid_string_dbg(map->sid)));
561 map->status = ID_UNMAPPED;
562 return NT_STATUS_NONE_MAPPED;
563 }
564
565 if (idmap_autorid_domsid_is_for_alloc(&domainsid)) {
566 DEBUG(10, ("SID %s is for ALLOC range.\n",
567 sid_string_dbg(map->sid)));
568
569 return idmap_autorid_sid_to_id_alloc(common, dom, map);
570 }
571
572 if (dom_sid_equal(&domainsid, &global_sid_Builtin) && ignore_builtin) {
573 DEBUG(10, ("Ignoring request for BUILTIN domain\n"));
574 map->status = ID_UNMAPPED;
575 return NT_STATUS_NONE_MAPPED;
576 }
577
578 sid_to_fstring(range.domsid, &domainsid);
579
580 range.domain_range_index = rid / (global->rangesize);
581
582 ret = idmap_autorid_getrange(autorid_db, range.domsid,
583 range.domain_range_index,
584 &range.rangenum, &range.low_id);
585 if (NT_STATUS_IS_OK(ret)) {
586 return idmap_autorid_sid_to_id_rid(
587 global->rangesize, range.low_id, map);
588 }
589
590 if (dom->read_only) {
591 DBG_DEBUG("read-only is enabled, did not allocate "
592 "new range for domain %s\n", range.domsid);
593 map->status = ID_UNMAPPED;
594 return NT_STATUS_NONE_MAPPED;
595 }
596
597 /*
598 * Check if we should allocate a domain range. We need to
599 * protect against unknown domains to not fill our ranges
600 * needlessly.
601 */
602
603 if (sid_check_is_builtin(&domainsid) ||
604 sid_check_is_our_sam(&domainsid)) {
605 goto allocate;
606 }
607
608 {
609 struct winbindd_domain *domain;
610
611 /*
612 * Deterministic check for domain members: We can be
613 * sure that the domain we are member of is worth to
614 * add a mapping for.
615 */
616
617 domain = find_our_domain();
618 if ((domain != NULL) &&
619 dom_sid_equal(&domain->sid, &domainsid)) {
620 goto allocate;
621 }
622 }
623
624 /*
625 * If we have already allocated range index 0, this domain is
626 * worth allocating for in higher ranges.
627 */
628 if (range.domain_range_index != 0) {
629 uint32_t zero_rangenum, zero_low_id;
630
631 ret = idmap_autorid_getrange(autorid_db, range.domsid, 0,
632 &zero_rangenum, &zero_low_id);
633 if (NT_STATUS_IS_OK(ret)) {
634 goto allocate;
635 }
636 }
637
638 /*
639 * If the caller already did a lookup sid and made sure the
640 * domain sid is valid, we can allocate a new range.
641 *
642 * Currently the winbindd parent already does a lookup sids
643 * first, but hopefully changes in future. If the
644 * caller knows the domain sid, ID_TYPE_BOTH should be
645 * passed instead of ID_TYPE_NOT_SPECIFIED.
646 */
647 if (map->xid.type != ID_TYPE_NOT_SPECIFIED) {
648 goto allocate;
649 }
650
651 /*
652 * Check of last resort: A domain is valid if a user from that
653 * domain has recently logged in. The samlogon_cache these
654 * days also stores the domain sid.
655 *
656 * We used to check the list of trusted domains we received
657 * from "our" dc, but this is not reliable enough.
658 */
659 if (netsamlogon_cache_have(&domainsid)) {
660 goto allocate;
661 }
662
663 /*
664 * Nobody knows this domain, so refuse to allocate a fresh
665 * range.
666 */
667
668 DBG_NOTICE("Allocating range for domain %s refused\n", range.domsid);
669 map->status = ID_UNMAPPED;
670 return NT_STATUS_NONE_MAPPED;
671
672 allocate:
673 ret = idmap_autorid_acquire_range(autorid_db, &range);
674 if (!NT_STATUS_IS_OK(ret)) {
675 DBG_NOTICE("Could not determine range for domain: %s, "
676 "check previous messages for reason\n",
677 nt_errstr(ret));
678 return ret;
679 }
680
681 return idmap_autorid_sid_to_id_rid(global->rangesize, range.low_id,
682 map);
683 }
684
685 /**********************************
686 lookup a set of sids.
687 **********************************/
688
689 static NTSTATUS idmap_autorid_sids_to_unixids(struct idmap_domain *dom,
690 struct id_map **ids)
691 {
692 struct idmap_tdb_common_context *commoncfg;
693 NTSTATUS ret;
694 int i;
695 int num_tomap = 0;
696 int num_mapped = 0;
697
698 /* initialize the status to avoid surprise */
699 for (i = 0; ids[i]; i++) {
700 ids[i]->status = ID_UNKNOWN;
701 num_tomap++;
702 }
703
704 commoncfg =
705 talloc_get_type_abort(dom->private_data,
706 struct idmap_tdb_common_context);
707
708 for (i = 0; ids[i]; i++) {
709 ret = idmap_autorid_sid_to_id(commoncfg, dom, ids[i]);
710 if ((!NT_STATUS_IS_OK(ret)) &&
711 (!NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED))) {
712 /* some fatal error occurred, log it */
713 DEBUG(3, ("Unexpected error resolving a SID (%s)\n",
714 sid_string_dbg(ids[i]->sid)));
715 return ret;
716 }
717
718 if (NT_STATUS_IS_OK(ret) && ids[i]->status == ID_MAPPED) {
719 num_mapped++;
720 }
721 }
722
723 if (num_tomap == num_mapped) {
724 return NT_STATUS_OK;
725 } else if (num_mapped == 0) {
726 return NT_STATUS_NONE_MAPPED;
727 }
728
729 return STATUS_SOME_UNMAPPED;
730 }
731
732 static NTSTATUS idmap_autorid_preallocate_wellknown(struct idmap_domain *dom)
733 {
734 const char *groups[] = { "S-1-1-0", "S-1-2-0", "S-1-2-1",
735 "S-1-3-0", "S-1-3-1", "S-1-3-2", "S-1-3-3", "S-1-3-4",
736 "S-1-5-1", "S-1-5-2", "S-1-5-3", "S-1-5-4", "S-1-5-6",
737 "S-1-5-7", "S-1-5-8", "S-1-5-9", "S-1-5-10", "S-1-5-11",
738 "S-1-5-12", "S-1-5-13", "S-1-5-14", "S-1-5-15",
739 "S-1-5-17", "S-1-5-18", "S-1-5-19", "S-1-5-20"
740 };
741
742 struct id_map **maps;
743 int i, num;
744 NTSTATUS status;
745
746 if (dom->read_only) {
747 return NT_STATUS_OK;
748 }
749
750 num = ARRAY_SIZE(groups);
751
752 maps = talloc_array(talloc_tos(), struct id_map*, num+1);
753 if (!maps) {
754 return NT_STATUS_NO_MEMORY;
755 }
756
757 for (i = 0; i < num; i++) {
758 maps[i] = talloc(maps, struct id_map);
759 if (maps[i] == NULL) {
760 talloc_free(maps);
761 return NT_STATUS_NO_MEMORY;
762 }
763 maps[i]->xid.type = ID_TYPE_GID;
764 maps[i]->sid = dom_sid_parse_talloc(maps, groups[i]);
765 }
766
767 maps[num] = NULL;
768
769 status = idmap_autorid_sids_to_unixids(dom, maps);
770
771 DEBUG(10,("Preallocation run finished with status %s\n",
772 nt_errstr(status)));
773
774 talloc_free(maps);
775
776 return NT_STATUS_IS_OK(status)?NT_STATUS_OK:NT_STATUS_UNSUCCESSFUL;
777 }
778
779 static NTSTATUS idmap_autorid_initialize_action(struct db_context *db,
780 void *private_data)
781 {
782 struct idmap_domain *dom;
783 struct idmap_tdb_common_context *common;
784 struct autorid_global_config *config;
785 NTSTATUS status;
786
787 dom = (struct idmap_domain *)private_data;
788 common = (struct idmap_tdb_common_context *)dom->private_data;
789 config = (struct autorid_global_config *)common->private_data;
790
791 status = idmap_autorid_init_hwms(db);
792 if (!NT_STATUS_IS_OK(status)) {
793 return status;
794 }
795
796 status = idmap_autorid_saveconfig(db, config);
797 if (!NT_STATUS_IS_OK(status)) {
798 DEBUG(1, ("Failed to store configuration data!\n"));
799 return status;
800 }
801
802 status = idmap_autorid_preallocate_wellknown(dom);
803 if (!NT_STATUS_IS_OK(status)) {
804 DEBUG(1, ("Failed to preallocate wellknown sids: %s\n",
805 nt_errstr(status)));
806 return status;
807 }
808
809 return NT_STATUS_OK;
810 }
811
812 static NTSTATUS idmap_autorid_initialize(struct idmap_domain *dom)
813 {
814 struct idmap_tdb_common_context *commonconfig;
815 struct autorid_global_config *config;
816 NTSTATUS status;
817 char *db_path;
818
819 if (!strequal(dom->name, "*")) {
820 DEBUG(0, ("idmap_autorid_initialize: Error: autorid configured "
821 "for domain '%s'. But autorid can only be used for "
822 "the default idmap configuration.\n", dom->name));
823 return NT_STATUS_INVALID_PARAMETER;
824 }
825
826 commonconfig = talloc_zero(dom, struct idmap_tdb_common_context);
827 if (!commonconfig) {
828 DEBUG(0, ("Out of memory!\n"));
829 return NT_STATUS_NO_MEMORY;
830 }
831 dom->private_data = commonconfig;
832
833 commonconfig->rw_ops = talloc_zero(commonconfig, struct idmap_rw_ops);
834 if (commonconfig->rw_ops == NULL) {
835 DEBUG(0, ("Out of memory!\n"));
836 return NT_STATUS_NO_MEMORY;
837 }
838
839 config = talloc_zero(commonconfig, struct autorid_global_config);
840 if (!config) {
841 DEBUG(0, ("Out of memory!\n"));
842 return NT_STATUS_NO_MEMORY;
843 }
844 commonconfig->private_data = config;
845
846 config->minvalue = dom->low_id;
847 config->rangesize = idmap_config_int("*", "rangesize", 100000);
848
849 config->maxranges = (dom->high_id - dom->low_id + 1) /
850 config->rangesize;
851
852 if (config->maxranges == 0) {
853 DEBUG(1, ("Allowed uid range is smaller than rangesize. "
854 "Increase uid range or decrease rangesize.\n"));
855 status = NT_STATUS_INVALID_PARAMETER;
856 goto error;
857 }
858
859 /* check if the high-low limit is a multiple of the rangesize */
860 if ((dom->high_id - dom->low_id + 1) % config->rangesize != 0) {
861 DEBUG(5, ("High uid-low uid difference of %d "
862 "is not a multiple of the rangesize %d, "
863 "limiting ranges to lower boundary number of %d\n",
864 (dom->high_id - dom->low_id + 1), config->rangesize,
865 config->maxranges));
866 }
867
868 DEBUG(5, ("%d domain ranges with a size of %d are available\n",
869 config->maxranges, config->rangesize));
870
871 ignore_builtin = idmap_config_bool("*", "ignore builtin", false);
872
873 /* fill the TDB common configuration */
874
875 commonconfig->max_id = config->rangesize - 1
876 - IDMAP_AUTORID_ALLOC_RESERVED;
877 commonconfig->hwmkey_uid = ALLOC_HWM_UID;
878 commonconfig->hwmkey_gid = ALLOC_HWM_GID;
879 commonconfig->rw_ops->get_new_id = idmap_autorid_allocate_id;
880 commonconfig->rw_ops->set_mapping = idmap_tdb_common_set_mapping;
881
882 db_path = state_path("autorid.tdb");
883 if (db_path == NULL) {
884 status = NT_STATUS_NO_MEMORY;
885 goto error;
886 }
887
888 status = idmap_autorid_db_open(db_path,
889 NULL, /* TALLOC_CTX */
890 &autorid_db);
891 TALLOC_FREE(db_path);
892 if (!NT_STATUS_IS_OK(status)) {
893 goto error;
894 }
895
896 commonconfig->db = autorid_db;
897
898 status = dbwrap_trans_do(autorid_db,
899 idmap_autorid_initialize_action,
900 dom);
901 if (!NT_STATUS_IS_OK(status)) {
902 DEBUG(1, ("Failed to init the idmap database: %s\n",
903 nt_errstr(status)));
904 goto error;
905 }
906
907 goto done;
908
909 error:
910 talloc_free(config);
911
912 done:
913 return status;
914 }
915
916 /*
917 Close the idmap tdb instance
918 */
919 static struct idmap_methods autorid_methods = {
920 .init = idmap_autorid_initialize,
921 .unixids_to_sids = idmap_autorid_unixids_to_sids,
922 .sids_to_unixids = idmap_autorid_sids_to_unixids,
923 .allocate_id = idmap_autorid_allocate_id
924 };
925
926 static_decl_idmap;
927 NTSTATUS idmap_autorid_init(void)
928 {
929 return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION,
930 "autorid", &autorid_methods);
931 }
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