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winbind cache: Don't create SN cache entries during name-to-sid queries.
[Samba.git] / source / winbindd / winbindd_cache.c
blob03512b9745460cdee5245f3bc3e38e41bebeae00
1 /*
2 Unix SMB/CIFS implementation.
3
4 Winbind cache backend functions
5
6 Copyright (C) Andrew Tridgell 2001
7 Copyright (C) Gerald Carter 2003-2007
8 Copyright (C) Volker Lendecke 2005
9 Copyright (C) Guenther Deschner 2005
10 Copyright (C) Michael Adam 2007
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 */
25
26 #include "includes.h"
27 #include "winbindd.h"
28
29 #undef DBGC_CLASS
30 #define DBGC_CLASS DBGC_WINBIND
31
32 #define WINBINDD_CACHE_VERSION 1
33 #define WINBINDD_CACHE_VERSION_KEYSTR "WINBINDD_CACHE_VERSION"
34
35 extern struct winbindd_methods reconnect_methods;
36 extern bool opt_nocache;
37 #ifdef HAVE_ADS
38 extern struct winbindd_methods ads_methods;
39 #endif
40 extern struct winbindd_methods builtin_passdb_methods;
41
42 /*
43 * JRA. KEEP THIS LIST UP TO DATE IF YOU ADD CACHE ENTRIES.
44 * Here are the list of entry types that are *not* stored
45 * as form struct cache_entry in the cache.
46 */
47
48 static const char *non_centry_keys[] = {
49 "SEQNUM/",
50 "DR/",
51 "DE/",
52 "WINBINDD_OFFLINE",
53 WINBINDD_CACHE_VERSION_KEYSTR,
54 NULL
55 };
56
57 /************************************************************************
58 Is this key a non-centry type ?
59 ************************************************************************/
60
61 static bool is_non_centry_key(TDB_DATA kbuf)
62 {
63 int i;
64
65 if (kbuf.dptr == NULL || kbuf.dsize == 0) {
66 return false;
67 }
68 for (i = 0; non_centry_keys[i] != NULL; i++) {
69 size_t namelen = strlen(non_centry_keys[i]);
70 if (kbuf.dsize < namelen) {
71 continue;
72 }
73 if (strncmp(non_centry_keys[i], (const char *)kbuf.dptr, namelen) == 0) {
74 return true;
75 }
76 }
77 return false;
78 }
79
80 /* Global online/offline state - False when online. winbindd starts up online
81 and sets this to true if the first query fails and there's an entry in
82 the cache tdb telling us to stay offline. */
83
84 static bool global_winbindd_offline_state;
85
86 struct winbind_cache {
87 TDB_CONTEXT *tdb;
88 };
89
90 struct cache_entry {
91 NTSTATUS status;
92 uint32 sequence_number;
93 uint8 *data;
94 uint32 len, ofs;
95 };
96
97 void (*smb_panic_fn)(const char *const why) = smb_panic;
98
99 #define WINBINDD_MAX_CACHE_SIZE (50*1024*1024)
100
101 static struct winbind_cache *wcache;
102
103 void winbindd_check_cache_size(time_t t)
104 {
105 static time_t last_check_time;
106 struct stat st;
107
108 if (last_check_time == (time_t)0)
109 last_check_time = t;
110
111 if (t - last_check_time < 60 && t - last_check_time > 0)
112 return;
113
114 if (wcache == NULL || wcache->tdb == NULL) {
115 DEBUG(0, ("Unable to check size of tdb cache - cache not open !\n"));
116 return;
117 }
118
119 if (fstat(tdb_fd(wcache->tdb), &st) == -1) {
120 DEBUG(0, ("Unable to check size of tdb cache %s!\n", strerror(errno) ));
121 return;
122 }
123
124 if (st.st_size > WINBINDD_MAX_CACHE_SIZE) {
125 DEBUG(10,("flushing cache due to size (%lu) > (%lu)\n",
126 (unsigned long)st.st_size,
127 (unsigned long)WINBINDD_MAX_CACHE_SIZE));
128 wcache_flush_cache();
129 }
130 }
131
132 /* get the winbind_cache structure */
133 static struct winbind_cache *get_cache(struct winbindd_domain *domain)
134 {
135 struct winbind_cache *ret = wcache;
136
137 /* We have to know what type of domain we are dealing with first. */
138
139 if (domain->internal) {
140 domain->backend = &builtin_passdb_methods;
141 domain->initialized = True;
142 }
143 if ( !domain->initialized ) {
144 init_dc_connection( domain );
145 }
146
147 /*
148 OK. listen up becasue I'm only going to say this once.
149 We have the following scenarios to consider
150 (a) trusted AD domains on a Samba DC,
151 (b) trusted AD domains and we are joined to a non-kerberos domain
152 (c) trusted AD domains and we are joined to a kerberos (AD) domain
153
154 For (a) we can always contact the trusted domain using krb5
155 since we have the domain trust account password
156
157 For (b) we can only use RPC since we have no way of
158 getting a krb5 ticket in our own domain
159
160 For (c) we can always use krb5 since we have a kerberos trust
161
162 --jerry
163 */
164
165 if (!domain->backend) {
166 #ifdef HAVE_ADS
167 struct winbindd_domain *our_domain = domain;
168
169 /* find our domain first so we can figure out if we
170 are joined to a kerberized domain */
171
172 if ( !domain->primary )
173 our_domain = find_our_domain();
174
175 if ((our_domain->active_directory || IS_DC)
176 && domain->active_directory
177 && !lp_winbind_rpc_only()) {
178 DEBUG(5,("get_cache: Setting ADS methods for domain %s\n", domain->name));
179 domain->backend = &ads_methods;
180 } else {
181 #endif /* HAVE_ADS */
182 DEBUG(5,("get_cache: Setting MS-RPC methods for domain %s\n", domain->name));
183 domain->backend = &reconnect_methods;
184 #ifdef HAVE_ADS
185 }
186 #endif /* HAVE_ADS */
187 }
188
189 if (ret)
190 return ret;
191
192 ret = SMB_XMALLOC_P(struct winbind_cache);
193 ZERO_STRUCTP(ret);
194
195 wcache = ret;
196 wcache_flush_cache();
197
198 return ret;
199 }
200
201 /*
202 free a centry structure
203 */
204 static void centry_free(struct cache_entry *centry)
205 {
206 if (!centry)
207 return;
208 SAFE_FREE(centry->data);
209 free(centry);
210 }
211
212 static bool centry_check_bytes(struct cache_entry *centry, size_t nbytes)
213 {
214 if (centry->len - centry->ofs < nbytes) {
215 DEBUG(0,("centry corruption? needed %u bytes, have %d\n",
216 (unsigned int)nbytes,
217 centry->len - centry->ofs));
218 return false;
219 }
220 return true;
221 }
222
223 /*
224 pull a uint32 from a cache entry
225 */
226 static uint32 centry_uint32(struct cache_entry *centry)
227 {
228 uint32 ret;
229
230 if (!centry_check_bytes(centry, 4)) {
231 smb_panic_fn("centry_uint32");
232 }
233 ret = IVAL(centry->data, centry->ofs);
234 centry->ofs += 4;
235 return ret;
236 }
237
238 /*
239 pull a uint16 from a cache entry
240 */
241 static uint16 centry_uint16(struct cache_entry *centry)
242 {
243 uint16 ret;
244 if (!centry_check_bytes(centry, 2)) {
245 smb_panic_fn("centry_uint16");
246 }
247 ret = CVAL(centry->data, centry->ofs);
248 centry->ofs += 2;
249 return ret;
250 }
251
252 /*
253 pull a uint8 from a cache entry
254 */
255 static uint8 centry_uint8(struct cache_entry *centry)
256 {
257 uint8 ret;
258 if (!centry_check_bytes(centry, 1)) {
259 smb_panic_fn("centry_uint8");
260 }
261 ret = CVAL(centry->data, centry->ofs);
262 centry->ofs += 1;
263 return ret;
264 }
265
266 /*
267 pull a NTTIME from a cache entry
268 */
269 static NTTIME centry_nttime(struct cache_entry *centry)
270 {
271 NTTIME ret;
272 if (!centry_check_bytes(centry, 8)) {
273 smb_panic_fn("centry_nttime");
274 }
275 ret = IVAL(centry->data, centry->ofs);
276 centry->ofs += 4;
277 ret += (uint64_t)IVAL(centry->data, centry->ofs) << 32;
278 centry->ofs += 4;
279 return ret;
280 }
281
282 /*
283 pull a time_t from a cache entry. time_t stored portably as a 64-bit time.
284 */
285 static time_t centry_time(struct cache_entry *centry)
286 {
287 return (time_t)centry_nttime(centry);
288 }
289
290 /* pull a string from a cache entry, using the supplied
291 talloc context
292 */
293 static char *centry_string(struct cache_entry *centry, TALLOC_CTX *mem_ctx)
294 {
295 uint32 len;
296 char *ret;
297
298 len = centry_uint8(centry);
299
300 if (len == 0xFF) {
301 /* a deliberate NULL string */
302 return NULL;
303 }
304
305 if (!centry_check_bytes(centry, (size_t)len)) {
306 smb_panic_fn("centry_string");
307 }
308
309 ret = TALLOC_ARRAY(mem_ctx, char, len+1);
310 if (!ret) {
311 smb_panic_fn("centry_string out of memory\n");
312 }
313 memcpy(ret,centry->data + centry->ofs, len);
314 ret[len] = 0;
315 centry->ofs += len;
316 return ret;
317 }
318
319 /* pull a hash16 from a cache entry, using the supplied
320 talloc context
321 */
322 static char *centry_hash16(struct cache_entry *centry, TALLOC_CTX *mem_ctx)
323 {
324 uint32 len;
325 char *ret;
326
327 len = centry_uint8(centry);
328
329 if (len != 16) {
330 DEBUG(0,("centry corruption? hash len (%u) != 16\n",
331 len ));
332 return NULL;
333 }
334
335 if (!centry_check_bytes(centry, 16)) {
336 return NULL;
337 }
338
339 ret = TALLOC_ARRAY(mem_ctx, char, 16);
340 if (!ret) {
341 smb_panic_fn("centry_hash out of memory\n");
342 }
343 memcpy(ret,centry->data + centry->ofs, 16);
344 centry->ofs += 16;
345 return ret;
346 }
347
348 /* pull a sid from a cache entry, using the supplied
349 talloc context
350 */
351 static bool centry_sid(struct cache_entry *centry, TALLOC_CTX *mem_ctx, DOM_SID *sid)
352 {
353 char *sid_string;
354 sid_string = centry_string(centry, mem_ctx);
355 if ((sid_string == NULL) || (!string_to_sid(sid, sid_string))) {
356 return false;
357 }
358 return true;
359 }
360
361
362 /*
363 pull a NTSTATUS from a cache entry
364 */
365 static NTSTATUS centry_ntstatus(struct cache_entry *centry)
366 {
367 NTSTATUS status;
368
369 status = NT_STATUS(centry_uint32(centry));
370 return status;
371 }
372
373
374 /* the server is considered down if it can't give us a sequence number */
375 static bool wcache_server_down(struct winbindd_domain *domain)
376 {
377 bool ret;
378
379 if (!wcache->tdb)
380 return false;
381
382 ret = (domain->sequence_number == DOM_SEQUENCE_NONE);
383
384 if (ret)
385 DEBUG(10,("wcache_server_down: server for Domain %s down\n",
386 domain->name ));
387 return ret;
388 }
389
390 static NTSTATUS fetch_cache_seqnum( struct winbindd_domain *domain, time_t now )
391 {
392 TDB_DATA data;
393 fstring key;
394 uint32 time_diff;
395
396 if (!wcache->tdb) {
397 DEBUG(10,("fetch_cache_seqnum: tdb == NULL\n"));
398 return NT_STATUS_UNSUCCESSFUL;
399 }
400
401 fstr_sprintf( key, "SEQNUM/%s", domain->name );
402
403 data = tdb_fetch_bystring( wcache->tdb, key );
404 if ( !data.dptr || data.dsize!=8 ) {
405 DEBUG(10,("fetch_cache_seqnum: invalid data size key [%s]\n", key ));
406 return NT_STATUS_UNSUCCESSFUL;
407 }
408
409 domain->sequence_number = IVAL(data.dptr, 0);
410 domain->last_seq_check = IVAL(data.dptr, 4);
411
412 SAFE_FREE(data.dptr);
413
414 /* have we expired? */
415
416 time_diff = now - domain->last_seq_check;
417 if ( time_diff > lp_winbind_cache_time() ) {
418 DEBUG(10,("fetch_cache_seqnum: timeout [%s][%u @ %u]\n",
419 domain->name, domain->sequence_number,
420 (uint32)domain->last_seq_check));
421 return NT_STATUS_UNSUCCESSFUL;
422 }
423
424 DEBUG(10,("fetch_cache_seqnum: success [%s][%u @ %u]\n",
425 domain->name, domain->sequence_number,
426 (uint32)domain->last_seq_check));
427
428 return NT_STATUS_OK;
429 }
430
431 static NTSTATUS store_cache_seqnum( struct winbindd_domain *domain )
432 {
433 TDB_DATA data;
434 fstring key_str;
435 uint8 buf[8];
436
437 if (!wcache->tdb) {
438 DEBUG(10,("store_cache_seqnum: tdb == NULL\n"));
439 return NT_STATUS_UNSUCCESSFUL;
440 }
441
442 fstr_sprintf( key_str, "SEQNUM/%s", domain->name );
443
444 SIVAL(buf, 0, domain->sequence_number);
445 SIVAL(buf, 4, domain->last_seq_check);
446 data.dptr = buf;
447 data.dsize = 8;
448
449 if ( tdb_store_bystring( wcache->tdb, key_str, data, TDB_REPLACE) == -1 ) {
450 DEBUG(10,("store_cache_seqnum: tdb_store fail key [%s]\n", key_str ));
451 return NT_STATUS_UNSUCCESSFUL;
452 }
453
454 DEBUG(10,("store_cache_seqnum: success [%s][%u @ %u]\n",
455 domain->name, domain->sequence_number,
456 (uint32)domain->last_seq_check));
457
458 return NT_STATUS_OK;
459 }
460
461 /*
462 refresh the domain sequence number. If force is true
463 then always refresh it, no matter how recently we fetched it
464 */
465
466 static void refresh_sequence_number(struct winbindd_domain *domain, bool force)
467 {
468 NTSTATUS status;
469 unsigned time_diff;
470 time_t t = time(NULL);
471 unsigned cache_time = lp_winbind_cache_time();
472
473 if ( IS_DOMAIN_OFFLINE(domain) ) {
474 return;
475 }
476
477 get_cache( domain );
478
479 #if 0 /* JERRY -- disable as the default cache time is now 5 minutes */
480 /* trying to reconnect is expensive, don't do it too often */
481 if (domain->sequence_number == DOM_SEQUENCE_NONE) {
482 cache_time *= 8;
483 }
484 #endif
485
486 time_diff = t - domain->last_seq_check;
487
488 /* see if we have to refetch the domain sequence number */
489 if (!force && (time_diff < cache_time)) {
490 DEBUG(10, ("refresh_sequence_number: %s time ok\n", domain->name));
491 goto done;
492 }
493
494 /* try to get the sequence number from the tdb cache first */
495 /* this will update the timestamp as well */
496
497 status = fetch_cache_seqnum( domain, t );
498 if ( NT_STATUS_IS_OK(status) )
499 goto done;
500
501 /* important! make sure that we know if this is a native
502 mode domain or not. And that we can contact it. */
503
504 if ( winbindd_can_contact_domain( domain ) ) {
505 status = domain->backend->sequence_number(domain,
506 &domain->sequence_number);
507 } else {
508 /* just use the current time */
509 status = NT_STATUS_OK;
510 domain->sequence_number = time(NULL);
511 }
512
513
514 /* the above call could have set our domain->backend to NULL when
515 * coming from offline to online mode, make sure to reinitialize the
516 * backend - Guenther */
517 get_cache( domain );
518
519 if (!NT_STATUS_IS_OK(status)) {
520 DEBUG(10,("refresh_sequence_number: failed with %s\n", nt_errstr(status)));
521 domain->sequence_number = DOM_SEQUENCE_NONE;
522 }
523
524 domain->last_status = status;
525 domain->last_seq_check = time(NULL);
526
527 /* save the new sequence number in the cache */
528 store_cache_seqnum( domain );
529
530 done:
531 DEBUG(10, ("refresh_sequence_number: %s seq number is now %d\n",
532 domain->name, domain->sequence_number));
533
534 return;
535 }
536
537 /*
538 decide if a cache entry has expired
539 */
540 static bool centry_expired(struct winbindd_domain *domain, const char *keystr, struct cache_entry *centry)
541 {
542 /* If we've been told to be offline - stay in that state... */
543 if (lp_winbind_offline_logon() && global_winbindd_offline_state) {
544 DEBUG(10,("centry_expired: Key %s for domain %s valid as winbindd is globally offline.\n",
545 keystr, domain->name ));
546 return false;
547 }
548
549 /* when the domain is offline return the cached entry.
550 * This deals with transient offline states... */
551
552 if (!domain->online) {
553 DEBUG(10,("centry_expired: Key %s for domain %s valid as domain is offline.\n",
554 keystr, domain->name ));
555 return false;
556 }
557
558 /* if the server is OK and our cache entry came from when it was down then
559 the entry is invalid */
560 if ((domain->sequence_number != DOM_SEQUENCE_NONE) &&
561 (centry->sequence_number == DOM_SEQUENCE_NONE)) {
562 DEBUG(10,("centry_expired: Key %s for domain %s invalid sequence.\n",
563 keystr, domain->name ));
564 return true;
565 }
566
567 /* if the server is down or the cache entry is not older than the
568 current sequence number then it is OK */
569 if (wcache_server_down(domain) ||
570 centry->sequence_number == domain->sequence_number) {
571 DEBUG(10,("centry_expired: Key %s for domain %s is good.\n",
572 keystr, domain->name ));
573 return false;
574 }
575
576 DEBUG(10,("centry_expired: Key %s for domain %s expired\n",
577 keystr, domain->name ));
578
579 /* it's expired */
580 return true;
581 }
582
583 static struct cache_entry *wcache_fetch_raw(char *kstr)
584 {
585 TDB_DATA data;
586 struct cache_entry *centry;
587 TDB_DATA key;
588
589 key = string_tdb_data(kstr);
590 data = tdb_fetch(wcache->tdb, key);
591 if (!data.dptr) {
592 /* a cache miss */
593 return NULL;
594 }
595
596 centry = SMB_XMALLOC_P(struct cache_entry);
597 centry->data = (unsigned char *)data.dptr;
598 centry->len = data.dsize;
599 centry->ofs = 0;
600
601 if (centry->len < 8) {
602 /* huh? corrupt cache? */
603 DEBUG(10,("wcache_fetch_raw: Corrupt cache for key %s (len < 8) ?\n", kstr));
604 centry_free(centry);
605 return NULL;
606 }
607
608 centry->status = centry_ntstatus(centry);
609 centry->sequence_number = centry_uint32(centry);
610
611 return centry;
612 }
613
614 /*
615 fetch an entry from the cache, with a varargs key. auto-fetch the sequence
616 number and return status
617 */
618 static struct cache_entry *wcache_fetch(struct winbind_cache *cache,
619 struct winbindd_domain *domain,
620 const char *format, ...) PRINTF_ATTRIBUTE(3,4);
621 static struct cache_entry *wcache_fetch(struct winbind_cache *cache,
622 struct winbindd_domain *domain,
623 const char *format, ...)
624 {
625 va_list ap;
626 char *kstr;
627 struct cache_entry *centry;
628
629 if (opt_nocache) {
630 return NULL;
631 }
632
633 refresh_sequence_number(domain, false);
634
635 va_start(ap, format);
636 smb_xvasprintf(&kstr, format, ap);
637 va_end(ap);
638
639 centry = wcache_fetch_raw(kstr);
640 if (centry == NULL) {
641 free(kstr);
642 return NULL;
643 }
644
645 if (centry_expired(domain, kstr, centry)) {
646
647 DEBUG(10,("wcache_fetch: entry %s expired for domain %s\n",
648 kstr, domain->name ));
649
650 centry_free(centry);
651 free(kstr);
652 return NULL;
653 }
654
655 DEBUG(10,("wcache_fetch: returning entry %s for domain %s\n",
656 kstr, domain->name ));
657
658 free(kstr);
659 return centry;
660 }
661
662 static void wcache_delete(const char *format, ...) PRINTF_ATTRIBUTE(1,2);
663 static void wcache_delete(const char *format, ...)
664 {
665 va_list ap;
666 char *kstr;
667 TDB_DATA key;
668
669 va_start(ap, format);
670 smb_xvasprintf(&kstr, format, ap);
671 va_end(ap);
672
673 key = string_tdb_data(kstr);
674
675 tdb_delete(wcache->tdb, key);
676 free(kstr);
677 }
678
679 /*
680 make sure we have at least len bytes available in a centry
681 */
682 static void centry_expand(struct cache_entry *centry, uint32 len)
683 {
684 if (centry->len - centry->ofs >= len)
685 return;
686 centry->len *= 2;
687 centry->data = SMB_REALLOC_ARRAY(centry->data, unsigned char,
688 centry->len);
689 if (!centry->data) {
690 DEBUG(0,("out of memory: needed %d bytes in centry_expand\n", centry->len));
691 smb_panic_fn("out of memory in centry_expand");
692 }
693 }
694
695 /*
696 push a uint32 into a centry
697 */
698 static void centry_put_uint32(struct cache_entry *centry, uint32 v)
699 {
700 centry_expand(centry, 4);
701 SIVAL(centry->data, centry->ofs, v);
702 centry->ofs += 4;
703 }
704
705 /*
706 push a uint16 into a centry
707 */
708 static void centry_put_uint16(struct cache_entry *centry, uint16 v)
709 {
710 centry_expand(centry, 2);
711 SIVAL(centry->data, centry->ofs, v);
712 centry->ofs += 2;
713 }
714
715 /*
716 push a uint8 into a centry
717 */
718 static void centry_put_uint8(struct cache_entry *centry, uint8 v)
719 {
720 centry_expand(centry, 1);
721 SCVAL(centry->data, centry->ofs, v);
722 centry->ofs += 1;
723 }
724
725 /*
726 push a string into a centry
727 */
728 static void centry_put_string(struct cache_entry *centry, const char *s)
729 {
730 int len;
731
732 if (!s) {
733 /* null strings are marked as len 0xFFFF */
734 centry_put_uint8(centry, 0xFF);
735 return;
736 }
737
738 len = strlen(s);
739 /* can't handle more than 254 char strings. Truncating is probably best */
740 if (len > 254) {
741 DEBUG(10,("centry_put_string: truncating len (%d) to: 254\n", len));
742 len = 254;
743 }
744 centry_put_uint8(centry, len);
745 centry_expand(centry, len);
746 memcpy(centry->data + centry->ofs, s, len);
747 centry->ofs += len;
748 }
749
750 /*
751 push a 16 byte hash into a centry - treat as 16 byte string.
752 */
753 static void centry_put_hash16(struct cache_entry *centry, const uint8 val[16])
754 {
755 centry_put_uint8(centry, 16);
756 centry_expand(centry, 16);
757 memcpy(centry->data + centry->ofs, val, 16);
758 centry->ofs += 16;
759 }
760
761 static void centry_put_sid(struct cache_entry *centry, const DOM_SID *sid)
762 {
763 fstring sid_string;
764 centry_put_string(centry, sid_to_fstring(sid_string, sid));
765 }
766
767
768 /*
769 put NTSTATUS into a centry
770 */
771 static void centry_put_ntstatus(struct cache_entry *centry, NTSTATUS status)
772 {
773 uint32 status_value = NT_STATUS_V(status);
774 centry_put_uint32(centry, status_value);
775 }
776
777
778 /*
779 push a NTTIME into a centry
780 */
781 static void centry_put_nttime(struct cache_entry *centry, NTTIME nt)
782 {
783 centry_expand(centry, 8);
784 SIVAL(centry->data, centry->ofs, nt & 0xFFFFFFFF);
785 centry->ofs += 4;
786 SIVAL(centry->data, centry->ofs, nt >> 32);
787 centry->ofs += 4;
788 }
789
790 /*
791 push a time_t into a centry - use a 64 bit size.
792 NTTIME here is being used as a convenient 64-bit size.
793 */
794 static void centry_put_time(struct cache_entry *centry, time_t t)
795 {
796 NTTIME nt = (NTTIME)t;
797 centry_put_nttime(centry, nt);
798 }
799
800 /*
801 start a centry for output. When finished, call centry_end()
802 */
803 struct cache_entry *centry_start(struct winbindd_domain *domain, NTSTATUS status)
804 {
805 struct cache_entry *centry;
806
807 if (!wcache->tdb)
808 return NULL;
809
810 centry = SMB_XMALLOC_P(struct cache_entry);
811
812 centry->len = 8192; /* reasonable default */
813 centry->data = SMB_XMALLOC_ARRAY(uint8, centry->len);
814 centry->ofs = 0;
815 centry->sequence_number = domain->sequence_number;
816 centry_put_ntstatus(centry, status);
817 centry_put_uint32(centry, centry->sequence_number);
818 return centry;
819 }
820
821 /*
822 finish a centry and write it to the tdb
823 */
824 static void centry_end(struct cache_entry *centry, const char *format, ...) PRINTF_ATTRIBUTE(2,3);
825 static void centry_end(struct cache_entry *centry, const char *format, ...)
826 {
827 va_list ap;
828 char *kstr;
829 TDB_DATA key, data;
830
831 if (opt_nocache) {
832 return;
833 }
834
835 va_start(ap, format);
836 smb_xvasprintf(&kstr, format, ap);
837 va_end(ap);
838
839 key = string_tdb_data(kstr);
840 data.dptr = centry->data;
841 data.dsize = centry->ofs;
842
843 tdb_store(wcache->tdb, key, data, TDB_REPLACE);
844 free(kstr);
845 }
846
847 static void wcache_save_name_to_sid(struct winbindd_domain *domain,
848 NTSTATUS status, const char *domain_name,
849 const char *name, const DOM_SID *sid,
850 enum lsa_SidType type)
851 {
852 struct cache_entry *centry;
853 fstring uname;
854
855 centry = centry_start(domain, status);
856 if (!centry)
857 return;
858 centry_put_uint32(centry, type);
859 centry_put_sid(centry, sid);
860 fstrcpy(uname, name);
861 strupper_m(uname);
862 centry_end(centry, "NS/%s/%s", domain_name, uname);
863 DEBUG(10,("wcache_save_name_to_sid: %s\\%s -> %s (%s)\n", domain_name,
864 uname, sid_string_dbg(sid), nt_errstr(status)));
865 centry_free(centry);
866 }
867
868 static void wcache_save_sid_to_name(struct winbindd_domain *domain, NTSTATUS status,
869 const DOM_SID *sid, const char *domain_name, const char *name, enum lsa_SidType type)
870 {
871 struct cache_entry *centry;
872 fstring sid_string;
873
874 centry = centry_start(domain, status);
875 if (!centry)
876 return;
877
878 if (NT_STATUS_IS_OK(status)) {
879 centry_put_uint32(centry, type);
880 centry_put_string(centry, domain_name);
881 centry_put_string(centry, name);
882 }
883
884 centry_end(centry, "SN/%s", sid_to_fstring(sid_string, sid));
885 DEBUG(10,("wcache_save_sid_to_name: %s -> %s (%s)\n", sid_string,
886 name, nt_errstr(status)));
887 centry_free(centry);
888 }
889
890
891 static void wcache_save_user(struct winbindd_domain *domain, NTSTATUS status, WINBIND_USERINFO *info)
892 {
893 struct cache_entry *centry;
894 fstring sid_string;
895
896 if (is_null_sid(&info->user_sid)) {
897 return;
898 }
899
900 centry = centry_start(domain, status);
901 if (!centry)
902 return;
903 centry_put_string(centry, info->acct_name);
904 centry_put_string(centry, info->full_name);
905 centry_put_string(centry, info->homedir);
906 centry_put_string(centry, info->shell);
907 centry_put_uint32(centry, info->primary_gid);
908 centry_put_sid(centry, &info->user_sid);
909 centry_put_sid(centry, &info->group_sid);
910 centry_end(centry, "U/%s", sid_to_fstring(sid_string,
911 &info->user_sid));
912 DEBUG(10,("wcache_save_user: %s (acct_name %s)\n", sid_string, info->acct_name));
913 centry_free(centry);
914 }
915
916 static void wcache_save_lockout_policy(struct winbindd_domain *domain,
917 NTSTATUS status,
918 struct samr_DomInfo12 *lockout_policy)
919 {
920 struct cache_entry *centry;
921
922 centry = centry_start(domain, status);
923 if (!centry)
924 return;
925
926 centry_put_nttime(centry, lockout_policy->lockout_duration);
927 centry_put_nttime(centry, lockout_policy->lockout_window);
928 centry_put_uint16(centry, lockout_policy->lockout_threshold);
929
930 centry_end(centry, "LOC_POL/%s", domain->name);
931
932 DEBUG(10,("wcache_save_lockout_policy: %s\n", domain->name));
933
934 centry_free(centry);
935 }
936
937 static void wcache_save_password_policy(struct winbindd_domain *domain,
938 NTSTATUS status,
939 struct samr_DomInfo1 *policy)
940 {
941 struct cache_entry *centry;
942
943 centry = centry_start(domain, status);
944 if (!centry)
945 return;
946
947 centry_put_uint16(centry, policy->min_password_length);
948 centry_put_uint16(centry, policy->password_history_length);
949 centry_put_uint32(centry, policy->password_properties);
950 centry_put_nttime(centry, policy->max_password_age);
951 centry_put_nttime(centry, policy->min_password_age);
952
953 centry_end(centry, "PWD_POL/%s", domain->name);
954
955 DEBUG(10,("wcache_save_password_policy: %s\n", domain->name));
956
957 centry_free(centry);
958 }
959
960 NTSTATUS wcache_cached_creds_exist(struct winbindd_domain *domain, const DOM_SID *sid)
961 {
962 struct winbind_cache *cache = get_cache(domain);
963 TDB_DATA data;
964 fstring key_str, tmp;
965 uint32 rid;
966
967 if (!cache->tdb) {
968 return NT_STATUS_INTERNAL_DB_ERROR;
969 }
970
971 if (is_null_sid(sid)) {
972 return NT_STATUS_INVALID_SID;
973 }
974
975 if (!(sid_peek_rid(sid, &rid)) || (rid == 0)) {
976 return NT_STATUS_INVALID_SID;
977 }
978
979 fstr_sprintf(key_str, "CRED/%s", sid_to_fstring(tmp, sid));
980
981 data = tdb_fetch(cache->tdb, string_tdb_data(key_str));
982 if (!data.dptr) {
983 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
984 }
985
986 SAFE_FREE(data.dptr);
987 return NT_STATUS_OK;
988 }
989
990 /* Lookup creds for a SID - copes with old (unsalted) creds as well
991 as new salted ones. */
992
993 NTSTATUS wcache_get_creds(struct winbindd_domain *domain,
994 TALLOC_CTX *mem_ctx,
995 const DOM_SID *sid,
996 const uint8 **cached_nt_pass,
997 const uint8 **cached_salt)
998 {
999 struct winbind_cache *cache = get_cache(domain);
1000 struct cache_entry *centry = NULL;
1001 NTSTATUS status;
1002 time_t t;
1003 uint32 rid;
1004 fstring tmp;
1005
1006 if (!cache->tdb) {
1007 return NT_STATUS_INTERNAL_DB_ERROR;
1008 }
1009
1010 if (is_null_sid(sid)) {
1011 return NT_STATUS_INVALID_SID;
1012 }
1013
1014 if (!(sid_peek_rid(sid, &rid)) || (rid == 0)) {
1015 return NT_STATUS_INVALID_SID;
1016 }
1017
1018 /* Try and get a salted cred first. If we can't
1019 fall back to an unsalted cred. */
1020
1021 centry = wcache_fetch(cache, domain, "CRED/%s",
1022 sid_to_fstring(tmp, sid));
1023 if (!centry) {
1024 DEBUG(10,("wcache_get_creds: entry for [CRED/%s] not found\n",
1025 sid_string_dbg(sid)));
1026 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1027 }
1028
1029 t = centry_time(centry);
1030
1031 /* In the salted case this isn't actually the nt_hash itself,
1032 but the MD5 of the salt + nt_hash. Let the caller
1033 sort this out. It can tell as we only return the cached_salt
1034 if we are returning a salted cred. */
1035
1036 *cached_nt_pass = (const uint8 *)centry_hash16(centry, mem_ctx);
1037 if (*cached_nt_pass == NULL) {
1038 fstring sidstr;
1039
1040 sid_to_fstring(sidstr, sid);
1041
1042 /* Bad (old) cred cache. Delete and pretend we
1043 don't have it. */
1044 DEBUG(0,("wcache_get_creds: bad entry for [CRED/%s] - deleting\n",
1045 sidstr));
1046 wcache_delete("CRED/%s", sidstr);
1047 centry_free(centry);
1048 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1049 }
1050
1051 /* We only have 17 bytes more data in the salted cred case. */
1052 if (centry->len - centry->ofs == 17) {
1053 *cached_salt = (const uint8 *)centry_hash16(centry, mem_ctx);
1054 } else {
1055 *cached_salt = NULL;
1056 }
1057
1058 dump_data_pw("cached_nt_pass", *cached_nt_pass, NT_HASH_LEN);
1059 if (*cached_salt) {
1060 dump_data_pw("cached_salt", *cached_salt, NT_HASH_LEN);
1061 }
1062
1063 status = centry->status;
1064
1065 DEBUG(10,("wcache_get_creds: [Cached] - cached creds for user %s status: %s\n",
1066 sid_string_dbg(sid), nt_errstr(status) ));
1067
1068 centry_free(centry);
1069 return status;
1070 }
1071
1072 /* Store creds for a SID - only writes out new salted ones. */
1073
1074 NTSTATUS wcache_save_creds(struct winbindd_domain *domain,
1075 TALLOC_CTX *mem_ctx,
1076 const DOM_SID *sid,
1077 const uint8 nt_pass[NT_HASH_LEN])
1078 {
1079 struct cache_entry *centry;
1080 fstring sid_string;
1081 uint32 rid;
1082 uint8 cred_salt[NT_HASH_LEN];
1083 uint8 salted_hash[NT_HASH_LEN];
1084
1085 if (is_null_sid(sid)) {
1086 return NT_STATUS_INVALID_SID;
1087 }
1088
1089 if (!(sid_peek_rid(sid, &rid)) || (rid == 0)) {
1090 return NT_STATUS_INVALID_SID;
1091 }
1092
1093 centry = centry_start(domain, NT_STATUS_OK);
1094 if (!centry) {
1095 return NT_STATUS_INTERNAL_DB_ERROR;
1096 }
1097
1098 dump_data_pw("nt_pass", nt_pass, NT_HASH_LEN);
1099
1100 centry_put_time(centry, time(NULL));
1101
1102 /* Create a salt and then salt the hash. */
1103 generate_random_buffer(cred_salt, NT_HASH_LEN);
1104 E_md5hash(cred_salt, nt_pass, salted_hash);
1105
1106 centry_put_hash16(centry, salted_hash);
1107 centry_put_hash16(centry, cred_salt);
1108 centry_end(centry, "CRED/%s", sid_to_fstring(sid_string, sid));
1109
1110 DEBUG(10,("wcache_save_creds: %s\n", sid_string));
1111
1112 centry_free(centry);
1113
1114 return NT_STATUS_OK;
1115 }
1116
1117
1118 /* Query display info. This is the basic user list fn */
1119 static NTSTATUS query_user_list(struct winbindd_domain *domain,
1120 TALLOC_CTX *mem_ctx,
1121 uint32 *num_entries,
1122 WINBIND_USERINFO **info)
1123 {
1124 struct winbind_cache *cache = get_cache(domain);
1125 struct cache_entry *centry = NULL;
1126 NTSTATUS status;
1127 unsigned int i, retry;
1128
1129 if (!cache->tdb)
1130 goto do_query;
1131
1132 centry = wcache_fetch(cache, domain, "UL/%s", domain->name);
1133 if (!centry)
1134 goto do_query;
1135
1136 *num_entries = centry_uint32(centry);
1137
1138 if (*num_entries == 0)
1139 goto do_cached;
1140
1141 (*info) = TALLOC_ARRAY(mem_ctx, WINBIND_USERINFO, *num_entries);
1142 if (! (*info)) {
1143 smb_panic_fn("query_user_list out of memory");
1144 }
1145 for (i=0; i<(*num_entries); i++) {
1146 (*info)[i].acct_name = centry_string(centry, mem_ctx);
1147 (*info)[i].full_name = centry_string(centry, mem_ctx);
1148 (*info)[i].homedir = centry_string(centry, mem_ctx);
1149 (*info)[i].shell = centry_string(centry, mem_ctx);
1150 centry_sid(centry, mem_ctx, &(*info)[i].user_sid);
1151 centry_sid(centry, mem_ctx, &(*info)[i].group_sid);
1152 }
1153
1154 do_cached:
1155 status = centry->status;
1156
1157 DEBUG(10,("query_user_list: [Cached] - cached list for domain %s status: %s\n",
1158 domain->name, nt_errstr(status) ));
1159
1160 centry_free(centry);
1161 return status;
1162
1163 do_query:
1164 *num_entries = 0;
1165 *info = NULL;
1166
1167 /* Return status value returned by seq number check */
1168
1169 if (!NT_STATUS_IS_OK(domain->last_status))
1170 return domain->last_status;
1171
1172 /* Put the query_user_list() in a retry loop. There appears to be
1173 * some bug either with Windows 2000 or Samba's handling of large
1174 * rpc replies. This manifests itself as sudden disconnection
1175 * at a random point in the enumeration of a large (60k) user list.
1176 * The retry loop simply tries the operation again. )-: It's not
1177 * pretty but an acceptable workaround until we work out what the
1178 * real problem is. */
1179
1180 retry = 0;
1181 do {
1182
1183 DEBUG(10,("query_user_list: [Cached] - doing backend query for list for domain %s\n",
1184 domain->name ));
1185
1186 status = domain->backend->query_user_list(domain, mem_ctx, num_entries, info);
1187 if (!NT_STATUS_IS_OK(status)) {
1188 DEBUG(3, ("query_user_list: returned 0x%08x, "
1189 "retrying\n", NT_STATUS_V(status)));
1190 }
1191 if (NT_STATUS_EQUAL(status, NT_STATUS_UNSUCCESSFUL)) {
1192 DEBUG(3, ("query_user_list: flushing "
1193 "connection cache\n"));
1194 invalidate_cm_connection(&domain->conn);
1195 }
1196
1197 } while (NT_STATUS_V(status) == NT_STATUS_V(NT_STATUS_UNSUCCESSFUL) &&
1198 (retry++ < 5));
1199
1200 /* and save it */
1201 refresh_sequence_number(domain, false);
1202 centry = centry_start(domain, status);
1203 if (!centry)
1204 goto skip_save;
1205 centry_put_uint32(centry, *num_entries);
1206 for (i=0; i<(*num_entries); i++) {
1207 centry_put_string(centry, (*info)[i].acct_name);
1208 centry_put_string(centry, (*info)[i].full_name);
1209 centry_put_string(centry, (*info)[i].homedir);
1210 centry_put_string(centry, (*info)[i].shell);
1211 centry_put_sid(centry, &(*info)[i].user_sid);
1212 centry_put_sid(centry, &(*info)[i].group_sid);
1213 if (domain->backend && domain->backend->consistent) {
1214 /* when the backend is consistent we can pre-prime some mappings */
1215 wcache_save_name_to_sid(domain, NT_STATUS_OK,
1216 domain->name,
1217 (*info)[i].acct_name,
1218 &(*info)[i].user_sid,
1219 SID_NAME_USER);
1220 wcache_save_sid_to_name(domain, NT_STATUS_OK,
1221 &(*info)[i].user_sid,
1222 domain->name,
1223 (*info)[i].acct_name,
1224 SID_NAME_USER);
1225 wcache_save_user(domain, NT_STATUS_OK, &(*info)[i]);
1226 }
1227 }
1228 centry_end(centry, "UL/%s", domain->name);
1229 centry_free(centry);
1230
1231 skip_save:
1232 return status;
1233 }
1234
1235 /* list all domain groups */
1236 static NTSTATUS enum_dom_groups(struct winbindd_domain *domain,
1237 TALLOC_CTX *mem_ctx,
1238 uint32 *num_entries,
1239 struct acct_info **info)
1240 {
1241 struct winbind_cache *cache = get_cache(domain);
1242 struct cache_entry *centry = NULL;
1243 NTSTATUS status;
1244 unsigned int i;
1245
1246 if (!cache->tdb)
1247 goto do_query;
1248
1249 centry = wcache_fetch(cache, domain, "GL/%s/domain", domain->name);
1250 if (!centry)
1251 goto do_query;
1252
1253 *num_entries = centry_uint32(centry);
1254
1255 if (*num_entries == 0)
1256 goto do_cached;
1257
1258 (*info) = TALLOC_ARRAY(mem_ctx, struct acct_info, *num_entries);
1259 if (! (*info)) {
1260 smb_panic_fn("enum_dom_groups out of memory");
1261 }
1262 for (i=0; i<(*num_entries); i++) {
1263 fstrcpy((*info)[i].acct_name, centry_string(centry, mem_ctx));
1264 fstrcpy((*info)[i].acct_desc, centry_string(centry, mem_ctx));
1265 (*info)[i].rid = centry_uint32(centry);
1266 }
1267
1268 do_cached:
1269 status = centry->status;
1270
1271 DEBUG(10,("enum_dom_groups: [Cached] - cached list for domain %s status: %s\n",
1272 domain->name, nt_errstr(status) ));
1273
1274 centry_free(centry);
1275 return status;
1276
1277 do_query:
1278 *num_entries = 0;
1279 *info = NULL;
1280
1281 /* Return status value returned by seq number check */
1282
1283 if (!NT_STATUS_IS_OK(domain->last_status))
1284 return domain->last_status;
1285
1286 DEBUG(10,("enum_dom_groups: [Cached] - doing backend query for list for domain %s\n",
1287 domain->name ));
1288
1289 status = domain->backend->enum_dom_groups(domain, mem_ctx, num_entries, info);
1290
1291 /* and save it */
1292 refresh_sequence_number(domain, false);
1293 centry = centry_start(domain, status);
1294 if (!centry)
1295 goto skip_save;
1296 centry_put_uint32(centry, *num_entries);
1297 for (i=0; i<(*num_entries); i++) {
1298 centry_put_string(centry, (*info)[i].acct_name);
1299 centry_put_string(centry, (*info)[i].acct_desc);
1300 centry_put_uint32(centry, (*info)[i].rid);
1301 }
1302 centry_end(centry, "GL/%s/domain", domain->name);
1303 centry_free(centry);
1304
1305 skip_save:
1306 return status;
1307 }
1308
1309 /* list all domain groups */
1310 static NTSTATUS enum_local_groups(struct winbindd_domain *domain,
1311 TALLOC_CTX *mem_ctx,
1312 uint32 *num_entries,
1313 struct acct_info **info)
1314 {
1315 struct winbind_cache *cache = get_cache(domain);
1316 struct cache_entry *centry = NULL;
1317 NTSTATUS status;
1318 unsigned int i;
1319
1320 if (!cache->tdb)
1321 goto do_query;
1322
1323 centry = wcache_fetch(cache, domain, "GL/%s/local", domain->name);
1324 if (!centry)
1325 goto do_query;
1326
1327 *num_entries = centry_uint32(centry);
1328
1329 if (*num_entries == 0)
1330 goto do_cached;
1331
1332 (*info) = TALLOC_ARRAY(mem_ctx, struct acct_info, *num_entries);
1333 if (! (*info)) {
1334 smb_panic_fn("enum_dom_groups out of memory");
1335 }
1336 for (i=0; i<(*num_entries); i++) {
1337 fstrcpy((*info)[i].acct_name, centry_string(centry, mem_ctx));
1338 fstrcpy((*info)[i].acct_desc, centry_string(centry, mem_ctx));
1339 (*info)[i].rid = centry_uint32(centry);
1340 }
1341
1342 do_cached:
1343
1344 /* If we are returning cached data and the domain controller
1345 is down then we don't know whether the data is up to date
1346 or not. Return NT_STATUS_MORE_PROCESSING_REQUIRED to
1347 indicate this. */
1348
1349 if (wcache_server_down(domain)) {
1350 DEBUG(10, ("enum_local_groups: returning cached user list and server was down\n"));
1351 status = NT_STATUS_MORE_PROCESSING_REQUIRED;
1352 } else
1353 status = centry->status;
1354
1355 DEBUG(10,("enum_local_groups: [Cached] - cached list for domain %s status: %s\n",
1356 domain->name, nt_errstr(status) ));
1357
1358 centry_free(centry);
1359 return status;
1360
1361 do_query:
1362 *num_entries = 0;
1363 *info = NULL;
1364
1365 /* Return status value returned by seq number check */
1366
1367 if (!NT_STATUS_IS_OK(domain->last_status))
1368 return domain->last_status;
1369
1370 DEBUG(10,("enum_local_groups: [Cached] - doing backend query for list for domain %s\n",
1371 domain->name ));
1372
1373 status = domain->backend->enum_local_groups(domain, mem_ctx, num_entries, info);
1374
1375 /* and save it */
1376 refresh_sequence_number(domain, false);
1377 centry = centry_start(domain, status);
1378 if (!centry)
1379 goto skip_save;
1380 centry_put_uint32(centry, *num_entries);
1381 for (i=0; i<(*num_entries); i++) {
1382 centry_put_string(centry, (*info)[i].acct_name);
1383 centry_put_string(centry, (*info)[i].acct_desc);
1384 centry_put_uint32(centry, (*info)[i].rid);
1385 }
1386 centry_end(centry, "GL/%s/local", domain->name);
1387 centry_free(centry);
1388
1389 skip_save:
1390 return status;
1391 }
1392
1393 /* convert a single name to a sid in a domain */
1394 static NTSTATUS name_to_sid(struct winbindd_domain *domain,
1395 TALLOC_CTX *mem_ctx,
1396 enum winbindd_cmd orig_cmd,
1397 const char *domain_name,
1398 const char *name,
1399 DOM_SID *sid,
1400 enum lsa_SidType *type)
1401 {
1402 struct winbind_cache *cache = get_cache(domain);
1403 struct cache_entry *centry = NULL;
1404 NTSTATUS status;
1405 fstring uname;
1406
1407 if (!cache->tdb)
1408 goto do_query;
1409
1410 fstrcpy(uname, name);
1411 strupper_m(uname);
1412 centry = wcache_fetch(cache, domain, "NS/%s/%s", domain_name, uname);
1413 if (!centry)
1414 goto do_query;
1415
1416 status = centry->status;
1417 if (NT_STATUS_IS_OK(status)) {
1418 *type = (enum lsa_SidType)centry_uint32(centry);
1419 centry_sid(centry, mem_ctx, sid);
1420 }
1421
1422 DEBUG(10,("name_to_sid: [Cached] - cached name for domain %s status: %s\n",
1423 domain->name, nt_errstr(status) ));
1424
1425 centry_free(centry);
1426 return status;
1427
1428 do_query:
1429 ZERO_STRUCTP(sid);
1430
1431 /* If the seq number check indicated that there is a problem
1432 * with this DC, then return that status... except for
1433 * access_denied. This is special because the dc may be in
1434 * "restrict anonymous = 1" mode, in which case it will deny
1435 * most unauthenticated operations, but *will* allow the LSA
1436 * name-to-sid that we try as a fallback. */
1437
1438 if (!(NT_STATUS_IS_OK(domain->last_status)
1439 || NT_STATUS_EQUAL(domain->last_status, NT_STATUS_ACCESS_DENIED)))
1440 return domain->last_status;
1441
1442 DEBUG(10,("name_to_sid: [Cached] - doing backend query for name for domain %s\n",
1443 domain->name ));
1444
1445 status = domain->backend->name_to_sid(domain, mem_ctx, orig_cmd,
1446 domain_name, name, sid, type);
1447
1448 /* and save it */
1449 refresh_sequence_number(domain, false);
1450
1451 if (domain->online &&
1452 (NT_STATUS_IS_OK(status) || NT_STATUS_EQUAL(status, NT_STATUS_NONE_MAPPED))) {
1453 wcache_save_name_to_sid(domain, status, domain_name, name, sid, *type);
1454
1455 /* Don't add SN cache entries for sid-to-name queries during this operation.
1456 * It leads to inconsistent answers during sid-to-name queries as the
1457 * client can ask for different combinations of lower case and upper case
1458 * names in these name-to-sid queries.
1459 */
1460
1461 }
1462
1463 return status;
1464 }
1465
1466 /* convert a sid to a user or group name. The sid is guaranteed to be in the domain
1467 given */
1468 static NTSTATUS sid_to_name(struct winbindd_domain *domain,
1469 TALLOC_CTX *mem_ctx,
1470 const DOM_SID *sid,
1471 char **domain_name,
1472 char **name,
1473 enum lsa_SidType *type)
1474 {
1475 struct winbind_cache *cache = get_cache(domain);
1476 struct cache_entry *centry = NULL;
1477 NTSTATUS status;
1478 fstring sid_string;
1479
1480 if (!cache->tdb)
1481 goto do_query;
1482
1483 centry = wcache_fetch(cache, domain, "SN/%s",
1484 sid_to_fstring(sid_string, sid));
1485 if (!centry)
1486 goto do_query;
1487
1488 status = centry->status;
1489 if (NT_STATUS_IS_OK(status)) {
1490 *type = (enum lsa_SidType)centry_uint32(centry);
1491 *domain_name = centry_string(centry, mem_ctx);
1492 *name = centry_string(centry, mem_ctx);
1493 }
1494
1495 DEBUG(10,("sid_to_name: [Cached] - cached name for domain %s status: %s\n",
1496 domain->name, nt_errstr(status) ));
1497
1498 centry_free(centry);
1499 return status;
1500
1501 do_query:
1502 *name = NULL;
1503 *domain_name = NULL;
1504
1505 /* If the seq number check indicated that there is a problem
1506 * with this DC, then return that status... except for
1507 * access_denied. This is special because the dc may be in
1508 * "restrict anonymous = 1" mode, in which case it will deny
1509 * most unauthenticated operations, but *will* allow the LSA
1510 * sid-to-name that we try as a fallback. */
1511
1512 if (!(NT_STATUS_IS_OK(domain->last_status)
1513 || NT_STATUS_EQUAL(domain->last_status, NT_STATUS_ACCESS_DENIED)))
1514 return domain->last_status;
1515
1516 DEBUG(10,("sid_to_name: [Cached] - doing backend query for name for domain %s\n",
1517 domain->name ));
1518
1519 status = domain->backend->sid_to_name(domain, mem_ctx, sid, domain_name, name, type);
1520
1521 /* and save it */
1522 refresh_sequence_number(domain, false);
1523 wcache_save_sid_to_name(domain, status, sid, *domain_name, *name, *type);
1524
1525 /* We can't save the name to sid mapping here, as with sid history a
1526 * later name2sid would give the wrong sid. */
1527
1528 return status;
1529 }
1530
1531 static NTSTATUS rids_to_names(struct winbindd_domain *domain,
1532 TALLOC_CTX *mem_ctx,
1533 const DOM_SID *domain_sid,
1534 uint32 *rids,
1535 size_t num_rids,
1536 char **domain_name,
1537 char ***names,
1538 enum lsa_SidType **types)
1539 {
1540 struct winbind_cache *cache = get_cache(domain);
1541 size_t i;
1542 NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
1543 bool have_mapped;
1544 bool have_unmapped;
1545
1546 *domain_name = NULL;
1547 *names = NULL;
1548 *types = NULL;
1549
1550 if (!cache->tdb) {
1551 goto do_query;
1552 }
1553
1554 if (num_rids == 0) {
1555 return NT_STATUS_OK;
1556 }
1557
1558 *names = TALLOC_ARRAY(mem_ctx, char *, num_rids);
1559 *types = TALLOC_ARRAY(mem_ctx, enum lsa_SidType, num_rids);
1560
1561 if ((*names == NULL) || (*types == NULL)) {
1562 result = NT_STATUS_NO_MEMORY;
1563 goto error;
1564 }
1565
1566 have_mapped = have_unmapped = false;
1567
1568 for (i=0; i<num_rids; i++) {
1569 DOM_SID sid;
1570 struct cache_entry *centry;
1571 fstring tmp;
1572
1573 if (!sid_compose(&sid, domain_sid, rids[i])) {
1574 result = NT_STATUS_INTERNAL_ERROR;
1575 goto error;
1576 }
1577
1578 centry = wcache_fetch(cache, domain, "SN/%s",
1579 sid_to_fstring(tmp, &sid));
1580 if (!centry) {
1581 goto do_query;
1582 }
1583
1584 (*types)[i] = SID_NAME_UNKNOWN;
1585 (*names)[i] = talloc_strdup(*names, "");
1586
1587 if (NT_STATUS_IS_OK(centry->status)) {
1588 char *dom;
1589 have_mapped = true;
1590 (*types)[i] = (enum lsa_SidType)centry_uint32(centry);
1591
1592 dom = centry_string(centry, mem_ctx);
1593 if (*domain_name == NULL) {
1594 *domain_name = dom;
1595 } else {
1596 talloc_free(dom);
1597 }
1598
1599 (*names)[i] = centry_string(centry, *names);
1600
1601 } else if (NT_STATUS_EQUAL(centry->status, NT_STATUS_NONE_MAPPED)) {
1602 have_unmapped = true;
1603
1604 } else {
1605 /* something's definitely wrong */
1606 result = centry->status;
1607 goto error;
1608 }
1609
1610 centry_free(centry);
1611 }
1612
1613 if (!have_mapped) {
1614 return NT_STATUS_NONE_MAPPED;
1615 }
1616 if (!have_unmapped) {
1617 return NT_STATUS_OK;
1618 }
1619 return STATUS_SOME_UNMAPPED;
1620
1621 do_query:
1622
1623 TALLOC_FREE(*names);
1624 TALLOC_FREE(*types);
1625
1626 result = domain->backend->rids_to_names(domain, mem_ctx, domain_sid,
1627 rids, num_rids, domain_name,
1628 names, types);
1629
1630 /*
1631 None of the queried rids has been found so save all negative entries
1632 */
1633 if (NT_STATUS_EQUAL(result, NT_STATUS_NONE_MAPPED)) {
1634 for (i = 0; i < num_rids; i++) {
1635 DOM_SID sid;
1636 const char *name = "";
1637 const enum lsa_SidType type = SID_NAME_UNKNOWN;
1638 NTSTATUS status = NT_STATUS_NONE_MAPPED;
1639
1640 if (!sid_compose(&sid, domain_sid, rids[i])) {
1641 return NT_STATUS_INTERNAL_ERROR;
1642 }
1643
1644 wcache_save_sid_to_name(domain, status, &sid, *domain_name,
1645 name, type);
1646 }
1647
1648 return result;
1649 }
1650
1651 /*
1652 Some or all of the queried rids have been found.
1653 */
1654 if (!NT_STATUS_IS_OK(result) &&
1655 !NT_STATUS_EQUAL(result, STATUS_SOME_UNMAPPED)) {
1656 return result;
1657 }
1658
1659 refresh_sequence_number(domain, false);
1660
1661 for (i=0; i<num_rids; i++) {
1662 DOM_SID sid;
1663 NTSTATUS status;
1664
1665 if (!sid_compose(&sid, domain_sid, rids[i])) {
1666 result = NT_STATUS_INTERNAL_ERROR;
1667 goto error;
1668 }
1669
1670 status = (*types)[i] == SID_NAME_UNKNOWN ?
1671 NT_STATUS_NONE_MAPPED : NT_STATUS_OK;
1672
1673 wcache_save_sid_to_name(domain, status, &sid, *domain_name,
1674 (*names)[i], (*types)[i]);
1675 }
1676
1677 return result;
1678
1679 error:
1680
1681 TALLOC_FREE(*names);
1682 TALLOC_FREE(*types);
1683 return result;
1684 }
1685
1686 /* Lookup user information from a rid */
1687 static NTSTATUS query_user(struct winbindd_domain *domain,
1688 TALLOC_CTX *mem_ctx,
1689 const DOM_SID *user_sid,
1690 WINBIND_USERINFO *info)
1691 {
1692 struct winbind_cache *cache = get_cache(domain);
1693 struct cache_entry *centry = NULL;
1694 NTSTATUS status;
1695 fstring tmp;
1696
1697 if (!cache->tdb)
1698 goto do_query;
1699
1700 centry = wcache_fetch(cache, domain, "U/%s",
1701 sid_to_fstring(tmp, user_sid));
1702
1703 /* If we have an access denied cache entry and a cached info3 in the
1704 samlogon cache then do a query. This will force the rpc back end
1705 to return the info3 data. */
1706
1707 if (NT_STATUS_V(domain->last_status) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) &&
1708 netsamlogon_cache_have(user_sid)) {
1709 DEBUG(10, ("query_user: cached access denied and have cached info3\n"));
1710 domain->last_status = NT_STATUS_OK;
1711 centry_free(centry);
1712 goto do_query;
1713 }
1714
1715 if (!centry)
1716 goto do_query;
1717
1718 /* if status is not ok then this is a negative hit
1719 and the rest of the data doesn't matter */
1720 status = centry->status;
1721 if (NT_STATUS_IS_OK(status)) {
1722 info->acct_name = centry_string(centry, mem_ctx);
1723 info->full_name = centry_string(centry, mem_ctx);
1724 info->homedir = centry_string(centry, mem_ctx);
1725 info->shell = centry_string(centry, mem_ctx);
1726 info->primary_gid = centry_uint32(centry);
1727 centry_sid(centry, mem_ctx, &info->user_sid);
1728 centry_sid(centry, mem_ctx, &info->group_sid);
1729 }
1730
1731 DEBUG(10,("query_user: [Cached] - cached info for domain %s status: %s\n",
1732 domain->name, nt_errstr(status) ));
1733
1734 centry_free(centry);
1735 return status;
1736
1737 do_query:
1738 ZERO_STRUCTP(info);
1739
1740 /* Return status value returned by seq number check */
1741
1742 if (!NT_STATUS_IS_OK(domain->last_status))
1743 return domain->last_status;
1744
1745 DEBUG(10,("query_user: [Cached] - doing backend query for info for domain %s\n",
1746 domain->name ));
1747
1748 status = domain->backend->query_user(domain, mem_ctx, user_sid, info);
1749
1750 /* and save it */
1751 refresh_sequence_number(domain, false);
1752 wcache_save_user(domain, status, info);
1753
1754 return status;
1755 }
1756
1757
1758 /* Lookup groups a user is a member of. */
1759 static NTSTATUS lookup_usergroups(struct winbindd_domain *domain,
1760 TALLOC_CTX *mem_ctx,
1761 const DOM_SID *user_sid,
1762 uint32 *num_groups, DOM_SID **user_gids)
1763 {
1764 struct winbind_cache *cache = get_cache(domain);
1765 struct cache_entry *centry = NULL;
1766 NTSTATUS status;
1767 unsigned int i;
1768 fstring sid_string;
1769
1770 if (!cache->tdb)
1771 goto do_query;
1772
1773 centry = wcache_fetch(cache, domain, "UG/%s",
1774 sid_to_fstring(sid_string, user_sid));
1775
1776 /* If we have an access denied cache entry and a cached info3 in the
1777 samlogon cache then do a query. This will force the rpc back end
1778 to return the info3 data. */
1779
1780 if (NT_STATUS_V(domain->last_status) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) &&
1781 netsamlogon_cache_have(user_sid)) {
1782 DEBUG(10, ("lookup_usergroups: cached access denied and have cached info3\n"));
1783 domain->last_status = NT_STATUS_OK;
1784 centry_free(centry);
1785 goto do_query;
1786 }
1787
1788 if (!centry)
1789 goto do_query;
1790
1791 *num_groups = centry_uint32(centry);
1792
1793 if (*num_groups == 0)
1794 goto do_cached;
1795
1796 (*user_gids) = TALLOC_ARRAY(mem_ctx, DOM_SID, *num_groups);
1797 if (! (*user_gids)) {
1798 smb_panic_fn("lookup_usergroups out of memory");
1799 }
1800 for (i=0; i<(*num_groups); i++) {
1801 centry_sid(centry, mem_ctx, &(*user_gids)[i]);
1802 }
1803
1804 do_cached:
1805 status = centry->status;
1806
1807 DEBUG(10,("lookup_usergroups: [Cached] - cached info for domain %s status: %s\n",
1808 domain->name, nt_errstr(status) ));
1809
1810 centry_free(centry);
1811 return status;
1812
1813 do_query:
1814 (*num_groups) = 0;
1815 (*user_gids) = NULL;
1816
1817 /* Return status value returned by seq number check */
1818
1819 if (!NT_STATUS_IS_OK(domain->last_status))
1820 return domain->last_status;
1821
1822 DEBUG(10,("lookup_usergroups: [Cached] - doing backend query for info for domain %s\n",
1823 domain->name ));
1824
1825 status = domain->backend->lookup_usergroups(domain, mem_ctx, user_sid, num_groups, user_gids);
1826
1827 if ( NT_STATUS_EQUAL(status, NT_STATUS_SYNCHRONIZATION_REQUIRED) )
1828 goto skip_save;
1829
1830 /* and save it */
1831 refresh_sequence_number(domain, false);
1832 centry = centry_start(domain, status);
1833 if (!centry)
1834 goto skip_save;
1835
1836 centry_put_uint32(centry, *num_groups);
1837 for (i=0; i<(*num_groups); i++) {
1838 centry_put_sid(centry, &(*user_gids)[i]);
1839 }
1840
1841 centry_end(centry, "UG/%s", sid_to_fstring(sid_string, user_sid));
1842 centry_free(centry);
1843
1844 skip_save:
1845 return status;
1846 }
1847
1848 static NTSTATUS lookup_useraliases(struct winbindd_domain *domain,
1849 TALLOC_CTX *mem_ctx,
1850 uint32 num_sids, const DOM_SID *sids,
1851 uint32 *num_aliases, uint32 **alias_rids)
1852 {
1853 struct winbind_cache *cache = get_cache(domain);
1854 struct cache_entry *centry = NULL;
1855 NTSTATUS status;
1856 char *sidlist = talloc_strdup(mem_ctx, "");
1857 int i;
1858
1859 if (!cache->tdb)
1860 goto do_query;
1861
1862 if (num_sids == 0) {
1863 *num_aliases = 0;
1864 *alias_rids = NULL;
1865 return NT_STATUS_OK;
1866 }
1867
1868 /* We need to cache indexed by the whole list of SIDs, the aliases
1869 * resulting might come from any of the SIDs. */
1870
1871 for (i=0; i<num_sids; i++) {
1872 fstring tmp;
1873 sidlist = talloc_asprintf(mem_ctx, "%s/%s", sidlist,
1874 sid_to_fstring(tmp, &sids[i]));
1875 if (sidlist == NULL)
1876 return NT_STATUS_NO_MEMORY;
1877 }
1878
1879 centry = wcache_fetch(cache, domain, "UA%s", sidlist);
1880
1881 if (!centry)
1882 goto do_query;
1883
1884 *num_aliases = centry_uint32(centry);
1885 *alias_rids = NULL;
1886
1887 if (*num_aliases) {
1888 (*alias_rids) = TALLOC_ARRAY(mem_ctx, uint32, *num_aliases);
1889
1890 if ((*alias_rids) == NULL) {
1891 centry_free(centry);
1892 return NT_STATUS_NO_MEMORY;
1893 }
1894 } else {
1895 (*alias_rids) = NULL;
1896 }
1897
1898 for (i=0; i<(*num_aliases); i++)
1899 (*alias_rids)[i] = centry_uint32(centry);
1900
1901 status = centry->status;
1902
1903 DEBUG(10,("lookup_useraliases: [Cached] - cached info for domain: %s "
1904 "status %s\n", domain->name, nt_errstr(status)));
1905
1906 centry_free(centry);
1907 return status;
1908
1909 do_query:
1910 (*num_aliases) = 0;
1911 (*alias_rids) = NULL;
1912
1913 if (!NT_STATUS_IS_OK(domain->last_status))
1914 return domain->last_status;
1915
1916 DEBUG(10,("lookup_usergroups: [Cached] - doing backend query for info "
1917 "for domain %s\n", domain->name ));
1918
1919 status = domain->backend->lookup_useraliases(domain, mem_ctx,
1920 num_sids, sids,
1921 num_aliases, alias_rids);
1922
1923 /* and save it */
1924 refresh_sequence_number(domain, false);
1925 centry = centry_start(domain, status);
1926 if (!centry)
1927 goto skip_save;
1928 centry_put_uint32(centry, *num_aliases);
1929 for (i=0; i<(*num_aliases); i++)
1930 centry_put_uint32(centry, (*alias_rids)[i]);
1931 centry_end(centry, "UA%s", sidlist);
1932 centry_free(centry);
1933
1934 skip_save:
1935 return status;
1936 }
1937
1938
1939 static NTSTATUS lookup_groupmem(struct winbindd_domain *domain,
1940 TALLOC_CTX *mem_ctx,
1941 const DOM_SID *group_sid, uint32 *num_names,
1942 DOM_SID **sid_mem, char ***names,
1943 uint32 **name_types)
1944 {
1945 struct winbind_cache *cache = get_cache(domain);
1946 struct cache_entry *centry = NULL;
1947 NTSTATUS status;
1948 unsigned int i;
1949 fstring sid_string;
1950
1951 if (!cache->tdb)
1952 goto do_query;
1953
1954 centry = wcache_fetch(cache, domain, "GM/%s",
1955 sid_to_fstring(sid_string, group_sid));
1956 if (!centry)
1957 goto do_query;
1958
1959 *num_names = centry_uint32(centry);
1960
1961 if (*num_names == 0)
1962 goto do_cached;
1963
1964 (*sid_mem) = TALLOC_ARRAY(mem_ctx, DOM_SID, *num_names);
1965 (*names) = TALLOC_ARRAY(mem_ctx, char *, *num_names);
1966 (*name_types) = TALLOC_ARRAY(mem_ctx, uint32, *num_names);
1967
1968 if (! (*sid_mem) || ! (*names) || ! (*name_types)) {
1969 smb_panic_fn("lookup_groupmem out of memory");
1970 }
1971
1972 for (i=0; i<(*num_names); i++) {
1973 centry_sid(centry, mem_ctx, &(*sid_mem)[i]);
1974 (*names)[i] = centry_string(centry, mem_ctx);
1975 (*name_types)[i] = centry_uint32(centry);
1976 }
1977
1978 do_cached:
1979 status = centry->status;
1980
1981 DEBUG(10,("lookup_groupmem: [Cached] - cached info for domain %s status: %s\n",
1982 domain->name, nt_errstr(status)));
1983
1984 centry_free(centry);
1985 return status;
1986
1987 do_query:
1988 (*num_names) = 0;
1989 (*sid_mem) = NULL;
1990 (*names) = NULL;
1991 (*name_types) = NULL;
1992
1993 /* Return status value returned by seq number check */
1994
1995 if (!NT_STATUS_IS_OK(domain->last_status))
1996 return domain->last_status;
1997
1998 DEBUG(10,("lookup_groupmem: [Cached] - doing backend query for info for domain %s\n",
1999 domain->name ));
2000
2001 status = domain->backend->lookup_groupmem(domain, mem_ctx, group_sid, num_names,
2002 sid_mem, names, name_types);
2003
2004 /* and save it */
2005 refresh_sequence_number(domain, false);
2006 centry = centry_start(domain, status);
2007 if (!centry)
2008 goto skip_save;
2009 centry_put_uint32(centry, *num_names);
2010 for (i=0; i<(*num_names); i++) {
2011 centry_put_sid(centry, &(*sid_mem)[i]);
2012 centry_put_string(centry, (*names)[i]);
2013 centry_put_uint32(centry, (*name_types)[i]);
2014 }
2015 centry_end(centry, "GM/%s", sid_to_fstring(sid_string, group_sid));
2016 centry_free(centry);
2017
2018 skip_save:
2019 return status;
2020 }
2021
2022 /* find the sequence number for a domain */
2023 static NTSTATUS sequence_number(struct winbindd_domain *domain, uint32 *seq)
2024 {
2025 refresh_sequence_number(domain, false);
2026
2027 *seq = domain->sequence_number;
2028
2029 return NT_STATUS_OK;
2030 }
2031
2032 /* enumerate trusted domains
2033 * (we need to have the list of trustdoms in the cache when we go offline) -
2034 * Guenther */
2035 static NTSTATUS trusted_domains(struct winbindd_domain *domain,
2036 TALLOC_CTX *mem_ctx,
2037 uint32 *num_domains,
2038 char ***names,
2039 char ***alt_names,
2040 DOM_SID **dom_sids)
2041 {
2042 struct winbind_cache *cache = get_cache(domain);
2043 struct cache_entry *centry = NULL;
2044 NTSTATUS status;
2045 int i;
2046
2047 if (!cache->tdb)
2048 goto do_query;
2049
2050 centry = wcache_fetch(cache, domain, "TRUSTDOMS/%s", domain->name);
2051
2052 if (!centry) {
2053 goto do_query;
2054 }
2055
2056 *num_domains = centry_uint32(centry);
2057
2058 if (*num_domains) {
2059 (*names) = TALLOC_ARRAY(mem_ctx, char *, *num_domains);
2060 (*alt_names) = TALLOC_ARRAY(mem_ctx, char *, *num_domains);
2061 (*dom_sids) = TALLOC_ARRAY(mem_ctx, DOM_SID, *num_domains);
2062
2063 if (! (*dom_sids) || ! (*names) || ! (*alt_names)) {
2064 smb_panic_fn("trusted_domains out of memory");
2065 }
2066 } else {
2067 (*names) = NULL;
2068 (*alt_names) = NULL;
2069 (*dom_sids) = NULL;
2070 }
2071
2072 for (i=0; i<(*num_domains); i++) {
2073 (*names)[i] = centry_string(centry, mem_ctx);
2074 (*alt_names)[i] = centry_string(centry, mem_ctx);
2075 centry_sid(centry, mem_ctx, &(*dom_sids)[i]);
2076 }
2077
2078 status = centry->status;
2079
2080 DEBUG(10,("trusted_domains: [Cached] - cached info for domain %s (%d trusts) status: %s\n",
2081 domain->name, *num_domains, nt_errstr(status) ));
2082
2083 centry_free(centry);
2084 return status;
2085
2086 do_query:
2087 (*num_domains) = 0;
2088 (*dom_sids) = NULL;
2089 (*names) = NULL;
2090 (*alt_names) = NULL;
2091
2092 /* Return status value returned by seq number check */
2093
2094 if (!NT_STATUS_IS_OK(domain->last_status))
2095 return domain->last_status;
2096
2097 DEBUG(10,("trusted_domains: [Cached] - doing backend query for info for domain %s\n",
2098 domain->name ));
2099
2100 status = domain->backend->trusted_domains(domain, mem_ctx, num_domains,
2101 names, alt_names, dom_sids);
2102
2103 /* no trusts gives NT_STATUS_NO_MORE_ENTRIES resetting to NT_STATUS_OK
2104 * so that the generic centry handling still applies correctly -
2105 * Guenther*/
2106
2107 if (!NT_STATUS_IS_ERR(status)) {
2108 status = NT_STATUS_OK;
2109 }
2110
2111
2112 #if 0 /* Disabled as we want the trust dom list to be managed by
2113 the main parent and always to make the query. --jerry */
2114
2115 /* and save it */
2116 refresh_sequence_number(domain, false);
2117
2118 centry = centry_start(domain, status);
2119 if (!centry)
2120 goto skip_save;
2121
2122 centry_put_uint32(centry, *num_domains);
2123
2124 for (i=0; i<(*num_domains); i++) {
2125 centry_put_string(centry, (*names)[i]);
2126 centry_put_string(centry, (*alt_names)[i]);
2127 centry_put_sid(centry, &(*dom_sids)[i]);
2128 }
2129
2130 centry_end(centry, "TRUSTDOMS/%s", domain->name);
2131
2132 centry_free(centry);
2133
2134 skip_save:
2135 #endif
2136
2137 return status;
2138 }
2139
2140 /* get lockout policy */
2141 static NTSTATUS lockout_policy(struct winbindd_domain *domain,
2142 TALLOC_CTX *mem_ctx,
2143 struct samr_DomInfo12 *policy)
2144 {
2145 struct winbind_cache *cache = get_cache(domain);
2146 struct cache_entry *centry = NULL;
2147 NTSTATUS status;
2148
2149 if (!cache->tdb)
2150 goto do_query;
2151
2152 centry = wcache_fetch(cache, domain, "LOC_POL/%s", domain->name);
2153
2154 if (!centry)
2155 goto do_query;
2156
2157 policy->lockout_duration = centry_nttime(centry);
2158 policy->lockout_window = centry_nttime(centry);
2159 policy->lockout_threshold = centry_uint16(centry);
2160
2161 status = centry->status;
2162
2163 DEBUG(10,("lockout_policy: [Cached] - cached info for domain %s status: %s\n",
2164 domain->name, nt_errstr(status) ));
2165
2166 centry_free(centry);
2167 return status;
2168
2169 do_query:
2170 ZERO_STRUCTP(policy);
2171
2172 /* Return status value returned by seq number check */
2173
2174 if (!NT_STATUS_IS_OK(domain->last_status))
2175 return domain->last_status;
2176
2177 DEBUG(10,("lockout_policy: [Cached] - doing backend query for info for domain %s\n",
2178 domain->name ));
2179
2180 status = domain->backend->lockout_policy(domain, mem_ctx, policy);
2181
2182 /* and save it */
2183 refresh_sequence_number(domain, false);
2184 wcache_save_lockout_policy(domain, status, policy);
2185
2186 return status;
2187 }
2188
2189 /* get password policy */
2190 static NTSTATUS password_policy(struct winbindd_domain *domain,
2191 TALLOC_CTX *mem_ctx,
2192 struct samr_DomInfo1 *policy)
2193 {
2194 struct winbind_cache *cache = get_cache(domain);
2195 struct cache_entry *centry = NULL;
2196 NTSTATUS status;
2197
2198 if (!cache->tdb)
2199 goto do_query;
2200
2201 centry = wcache_fetch(cache, domain, "PWD_POL/%s", domain->name);
2202
2203 if (!centry)
2204 goto do_query;
2205
2206 policy->min_password_length = centry_uint16(centry);
2207 policy->password_history_length = centry_uint16(centry);
2208 policy->password_properties = centry_uint32(centry);
2209 policy->max_password_age = centry_nttime(centry);
2210 policy->min_password_age = centry_nttime(centry);
2211
2212 status = centry->status;
2213
2214 DEBUG(10,("lockout_policy: [Cached] - cached info for domain %s status: %s\n",
2215 domain->name, nt_errstr(status) ));
2216
2217 centry_free(centry);
2218 return status;
2219
2220 do_query:
2221 ZERO_STRUCTP(policy);
2222
2223 /* Return status value returned by seq number check */
2224
2225 if (!NT_STATUS_IS_OK(domain->last_status))
2226 return domain->last_status;
2227
2228 DEBUG(10,("password_policy: [Cached] - doing backend query for info for domain %s\n",
2229 domain->name ));
2230
2231 status = domain->backend->password_policy(domain, mem_ctx, policy);
2232
2233 /* and save it */
2234 refresh_sequence_number(domain, false);
2235 if (NT_STATUS_IS_OK(status)) {
2236 wcache_save_password_policy(domain, status, policy);
2237 }
2238
2239 return status;
2240 }
2241
2242
2243 /* Invalidate cached user and group lists coherently */
2244
2245 static int traverse_fn(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf,
2246 void *state)
2247 {
2248 if (strncmp((const char *)kbuf.dptr, "UL/", 3) == 0 ||
2249 strncmp((const char *)kbuf.dptr, "GL/", 3) == 0)
2250 tdb_delete(the_tdb, kbuf);
2251
2252 return 0;
2253 }
2254
2255 /* Invalidate the getpwnam and getgroups entries for a winbindd domain */
2256
2257 void wcache_invalidate_samlogon(struct winbindd_domain *domain,
2258 struct netr_SamInfo3 *info3)
2259 {
2260 struct winbind_cache *cache;
2261
2262 /* dont clear cached U/SID and UG/SID entries when we want to logon
2263 * offline - gd */
2264
2265 if (lp_winbind_offline_logon()) {
2266 return;
2267 }
2268
2269 if (!domain)
2270 return;
2271
2272 cache = get_cache(domain);
2273 netsamlogon_clear_cached_user(cache->tdb, info3);
2274 }
2275
2276 bool wcache_invalidate_cache(void)
2277 {
2278 struct winbindd_domain *domain;
2279
2280 for (domain = domain_list(); domain; domain = domain->next) {
2281 struct winbind_cache *cache = get_cache(domain);
2282
2283 DEBUG(10, ("wcache_invalidate_cache: invalidating cache "
2284 "entries for %s\n", domain->name));
2285 if (cache) {
2286 if (cache->tdb) {
2287 tdb_traverse(cache->tdb, traverse_fn, NULL);
2288 } else {
2289 return false;
2290 }
2291 }
2292 }
2293 return true;
2294 }
2295
2296 bool init_wcache(void)
2297 {
2298 if (wcache == NULL) {
2299 wcache = SMB_XMALLOC_P(struct winbind_cache);
2300 ZERO_STRUCTP(wcache);
2301 }
2302
2303 if (wcache->tdb != NULL)
2304 return true;
2305
2306 /* when working offline we must not clear the cache on restart */
2307 wcache->tdb = tdb_open_log(lock_path("winbindd_cache.tdb"),
2308 WINBINDD_CACHE_TDB_DEFAULT_HASH_SIZE,
2309 lp_winbind_offline_logon() ? TDB_DEFAULT : (TDB_DEFAULT | TDB_CLEAR_IF_FIRST),
2310 O_RDWR|O_CREAT, 0600);
2311
2312 if (wcache->tdb == NULL) {
2313 DEBUG(0,("Failed to open winbindd_cache.tdb!\n"));
2314 return false;
2315 }
2316
2317 return true;
2318 }
2319
2320 /************************************************************************
2321 This is called by the parent to initialize the cache file.
2322 We don't need sophisticated locking here as we know we're the
2323 only opener.
2324 ************************************************************************/
2325
2326 bool initialize_winbindd_cache(void)
2327 {
2328 bool cache_bad = true;
2329 uint32 vers;
2330
2331 if (!init_wcache()) {
2332 DEBUG(0,("initialize_winbindd_cache: init_wcache failed.\n"));
2333 return false;
2334 }
2335
2336 /* Check version number. */
2337 if (tdb_fetch_uint32(wcache->tdb, WINBINDD_CACHE_VERSION_KEYSTR, &vers) &&
2338 vers == WINBINDD_CACHE_VERSION) {
2339 cache_bad = false;
2340 }
2341
2342 if (cache_bad) {
2343 DEBUG(0,("initialize_winbindd_cache: clearing cache "
2344 "and re-creating with version number %d\n",
2345 WINBINDD_CACHE_VERSION ));
2346
2347 tdb_close(wcache->tdb);
2348 wcache->tdb = NULL;
2349
2350 if (unlink(lock_path("winbindd_cache.tdb")) == -1) {
2351 DEBUG(0,("initialize_winbindd_cache: unlink %s failed %s ",
2352 lock_path("winbindd_cache.tdb"),
2353 strerror(errno) ));
2354 return false;
2355 }
2356 if (!init_wcache()) {
2357 DEBUG(0,("initialize_winbindd_cache: re-initialization "
2358 "init_wcache failed.\n"));
2359 return false;
2360 }
2361
2362 /* Write the version. */
2363 if (!tdb_store_uint32(wcache->tdb, WINBINDD_CACHE_VERSION_KEYSTR, WINBINDD_CACHE_VERSION)) {
2364 DEBUG(0,("initialize_winbindd_cache: version number store failed %s\n",
2365 tdb_errorstr(wcache->tdb) ));
2366 return false;
2367 }
2368 }
2369
2370 tdb_close(wcache->tdb);
2371 wcache->tdb = NULL;
2372 return true;
2373 }
2374
2375 void close_winbindd_cache(void)
2376 {
2377 if (!wcache) {
2378 return;
2379 }
2380 if (wcache->tdb) {
2381 tdb_close(wcache->tdb);
2382 wcache->tdb = NULL;
2383 }
2384 }
2385
2386 void cache_store_response(pid_t pid, struct winbindd_response *response)
2387 {
2388 fstring key_str;
2389
2390 if (!init_wcache())
2391 return;
2392
2393 DEBUG(10, ("Storing response for pid %d, len %d\n",
2394 pid, response->length));
2395
2396 fstr_sprintf(key_str, "DR/%d", pid);
2397 if (tdb_store(wcache->tdb, string_tdb_data(key_str),
2398 make_tdb_data((uint8 *)response, sizeof(*response)),
2399 TDB_REPLACE) == -1)
2400 return;
2401
2402 if (response->length == sizeof(*response))
2403 return;
2404
2405 /* There's extra data */
2406
2407 DEBUG(10, ("Storing extra data: len=%d\n",
2408 (int)(response->length - sizeof(*response))));
2409
2410 fstr_sprintf(key_str, "DE/%d", pid);
2411 if (tdb_store(wcache->tdb, string_tdb_data(key_str),
2412 make_tdb_data((uint8 *)response->extra_data.data,
2413 response->length - sizeof(*response)),
2414 TDB_REPLACE) == 0)
2415 return;
2416
2417 /* We could not store the extra data, make sure the tdb does not
2418 * contain a main record with wrong dangling extra data */
2419
2420 fstr_sprintf(key_str, "DR/%d", pid);
2421 tdb_delete(wcache->tdb, string_tdb_data(key_str));
2422
2423 return;
2424 }
2425
2426 bool cache_retrieve_response(pid_t pid, struct winbindd_response * response)
2427 {
2428 TDB_DATA data;
2429 fstring key_str;
2430
2431 if (!init_wcache())
2432 return false;
2433
2434 DEBUG(10, ("Retrieving response for pid %d\n", pid));
2435
2436 fstr_sprintf(key_str, "DR/%d", pid);
2437 data = tdb_fetch(wcache->tdb, string_tdb_data(key_str));
2438
2439 if (data.dptr == NULL)
2440 return false;
2441
2442 if (data.dsize != sizeof(*response))
2443 return false;
2444
2445 memcpy(response, data.dptr, data.dsize);
2446 SAFE_FREE(data.dptr);
2447
2448 if (response->length == sizeof(*response)) {
2449 response->extra_data.data = NULL;
2450 return true;
2451 }
2452
2453 /* There's extra data */
2454
2455 DEBUG(10, ("Retrieving extra data length=%d\n",
2456 (int)(response->length - sizeof(*response))));
2457
2458 fstr_sprintf(key_str, "DE/%d", pid);
2459 data = tdb_fetch(wcache->tdb, string_tdb_data(key_str));
2460
2461 if (data.dptr == NULL) {
2462 DEBUG(0, ("Did not find extra data\n"));
2463 return false;
2464 }
2465
2466 if (data.dsize != (response->length - sizeof(*response))) {
2467 DEBUG(0, ("Invalid extra data length: %d\n", (int)data.dsize));
2468 SAFE_FREE(data.dptr);
2469 return false;
2470 }
2471
2472 dump_data(11, (uint8 *)data.dptr, data.dsize);
2473
2474 response->extra_data.data = data.dptr;
2475 return true;
2476 }
2477
2478 void cache_cleanup_response(pid_t pid)
2479 {
2480 fstring key_str;
2481
2482 if (!init_wcache())
2483 return;
2484
2485 fstr_sprintf(key_str, "DR/%d", pid);
2486 tdb_delete(wcache->tdb, string_tdb_data(key_str));
2487
2488 fstr_sprintf(key_str, "DE/%d", pid);
2489 tdb_delete(wcache->tdb, string_tdb_data(key_str));
2490
2491 return;
2492 }
2493
2494
2495 bool lookup_cached_sid(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
2496 char **domain_name, char **name,
2497 enum lsa_SidType *type)
2498 {
2499 struct winbindd_domain *domain;
2500 struct winbind_cache *cache;
2501 struct cache_entry *centry = NULL;
2502 NTSTATUS status;
2503 fstring tmp;
2504
2505 domain = find_lookup_domain_from_sid(sid);
2506 if (domain == NULL) {
2507 return false;
2508 }
2509
2510 cache = get_cache(domain);
2511
2512 if (cache->tdb == NULL) {
2513 return false;
2514 }
2515
2516 centry = wcache_fetch(cache, domain, "SN/%s",
2517 sid_to_fstring(tmp, sid));
2518 if (centry == NULL) {
2519 return false;
2520 }
2521
2522 if (NT_STATUS_IS_OK(centry->status)) {
2523 *type = (enum lsa_SidType)centry_uint32(centry);
2524 *domain_name = centry_string(centry, mem_ctx);
2525 *name = centry_string(centry, mem_ctx);
2526 }
2527
2528 status = centry->status;
2529 centry_free(centry);
2530 return NT_STATUS_IS_OK(status);
2531 }
2532
2533 bool lookup_cached_name(TALLOC_CTX *mem_ctx,
2534 const char *domain_name,
2535 const char *name,
2536 DOM_SID *sid,
2537 enum lsa_SidType *type)
2538 {
2539 struct winbindd_domain *domain;
2540 struct winbind_cache *cache;
2541 struct cache_entry *centry = NULL;
2542 NTSTATUS status;
2543 fstring uname;
2544 bool original_online_state;
2545
2546 domain = find_lookup_domain_from_name(domain_name);
2547 if (domain == NULL) {
2548 return false;
2549 }
2550
2551 cache = get_cache(domain);
2552
2553 if (cache->tdb == NULL) {
2554 return false;
2555 }
2556
2557 fstrcpy(uname, name);
2558 strupper_m(uname);
2559
2560 /* If we are doing a cached logon, temporarily set the domain
2561 offline so the cache won't expire the entry */
2562
2563 original_online_state = domain->online;
2564 domain->online = false;
2565 centry = wcache_fetch(cache, domain, "NS/%s/%s", domain_name, uname);
2566 domain->online = original_online_state;
2567
2568 if (centry == NULL) {
2569 return false;
2570 }
2571
2572 if (NT_STATUS_IS_OK(centry->status)) {
2573 *type = (enum lsa_SidType)centry_uint32(centry);
2574 centry_sid(centry, mem_ctx, sid);
2575 }
2576
2577 status = centry->status;
2578 centry_free(centry);
2579
2580 return NT_STATUS_IS_OK(status);
2581 }
2582
2583 void cache_name2sid(struct winbindd_domain *domain,
2584 const char *domain_name, const char *name,
2585 enum lsa_SidType type, const DOM_SID *sid)
2586 {
2587 refresh_sequence_number(domain, false);
2588 wcache_save_name_to_sid(domain, NT_STATUS_OK, domain_name, name,
2589 sid, type);
2590 }
2591
2592 /*
2593 * The original idea that this cache only contains centries has
2594 * been blurred - now other stuff gets put in here. Ensure we
2595 * ignore these things on cleanup.
2596 */
2597
2598 static int traverse_fn_cleanup(TDB_CONTEXT *the_tdb, TDB_DATA kbuf,
2599 TDB_DATA dbuf, void *state)
2600 {
2601 struct cache_entry *centry;
2602
2603 if (is_non_centry_key(kbuf)) {
2604 return 0;
2605 }
2606
2607 centry = wcache_fetch_raw((char *)kbuf.dptr);
2608 if (!centry) {
2609 return 0;
2610 }
2611
2612 if (!NT_STATUS_IS_OK(centry->status)) {
2613 DEBUG(10,("deleting centry %s\n", (const char *)kbuf.dptr));
2614 tdb_delete(the_tdb, kbuf);
2615 }
2616
2617 centry_free(centry);
2618 return 0;
2619 }
2620
2621 /* flush the cache */
2622 void wcache_flush_cache(void)
2623 {
2624 if (!wcache)
2625 return;
2626 if (wcache->tdb) {
2627 tdb_close(wcache->tdb);
2628 wcache->tdb = NULL;
2629 }
2630 if (opt_nocache)
2631 return;
2632
2633 /* when working offline we must not clear the cache on restart */
2634 wcache->tdb = tdb_open_log(lock_path("winbindd_cache.tdb"),
2635 WINBINDD_CACHE_TDB_DEFAULT_HASH_SIZE,
2636 lp_winbind_offline_logon() ? TDB_DEFAULT : (TDB_DEFAULT | TDB_CLEAR_IF_FIRST),
2637 O_RDWR|O_CREAT, 0600);
2638
2639 if (!wcache->tdb) {
2640 DEBUG(0,("Failed to open winbindd_cache.tdb!\n"));
2641 return;
2642 }
2643
2644 tdb_traverse(wcache->tdb, traverse_fn_cleanup, NULL);
2645
2646 DEBUG(10,("wcache_flush_cache success\n"));
2647 }
2648
2649 /* Count cached creds */
2650
2651 static int traverse_fn_cached_creds(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf,
2652 void *state)
2653 {
2654 int *cred_count = (int*)state;
2655
2656 if (strncmp((const char *)kbuf.dptr, "CRED/", 5) == 0) {
2657 (*cred_count)++;
2658 }
2659 return 0;
2660 }
2661
2662 NTSTATUS wcache_count_cached_creds(struct winbindd_domain *domain, int *count)
2663 {
2664 struct winbind_cache *cache = get_cache(domain);
2665
2666 *count = 0;
2667
2668 if (!cache->tdb) {
2669 return NT_STATUS_INTERNAL_DB_ERROR;
2670 }
2671
2672 tdb_traverse(cache->tdb, traverse_fn_cached_creds, (void *)count);
2673
2674 return NT_STATUS_OK;
2675 }
2676
2677 struct cred_list {
2678 struct cred_list *prev, *next;
2679 TDB_DATA key;
2680 fstring name;
2681 time_t created;
2682 };
2683 static struct cred_list *wcache_cred_list;
2684
2685 static int traverse_fn_get_credlist(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf,
2686 void *state)
2687 {
2688 struct cred_list *cred;
2689
2690 if (strncmp((const char *)kbuf.dptr, "CRED/", 5) == 0) {
2691
2692 cred = SMB_MALLOC_P(struct cred_list);
2693 if (cred == NULL) {
2694 DEBUG(0,("traverse_fn_remove_first_creds: failed to malloc new entry for list\n"));
2695 return -1;
2696 }
2697
2698 ZERO_STRUCTP(cred);
2699
2700 /* save a copy of the key */
2701
2702 fstrcpy(cred->name, (const char *)kbuf.dptr);
2703 DLIST_ADD(wcache_cred_list, cred);
2704 }
2705
2706 return 0;
2707 }
2708
2709 NTSTATUS wcache_remove_oldest_cached_creds(struct winbindd_domain *domain, const DOM_SID *sid)
2710 {
2711 struct winbind_cache *cache = get_cache(domain);
2712 NTSTATUS status;
2713 int ret;
2714 struct cred_list *cred, *oldest = NULL;
2715
2716 if (!cache->tdb) {
2717 return NT_STATUS_INTERNAL_DB_ERROR;
2718 }
2719
2720 /* we possibly already have an entry */
2721 if (sid && NT_STATUS_IS_OK(wcache_cached_creds_exist(domain, sid))) {
2722
2723 fstring key_str, tmp;
2724
2725 DEBUG(11,("we already have an entry, deleting that\n"));
2726
2727 fstr_sprintf(key_str, "CRED/%s", sid_to_fstring(tmp, sid));
2728
2729 tdb_delete(cache->tdb, string_tdb_data(key_str));
2730
2731 return NT_STATUS_OK;
2732 }
2733
2734 ret = tdb_traverse(cache->tdb, traverse_fn_get_credlist, NULL);
2735 if (ret == 0) {
2736 return NT_STATUS_OK;
2737 } else if ((ret == -1) || (wcache_cred_list == NULL)) {
2738 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2739 }
2740
2741 ZERO_STRUCTP(oldest);
2742
2743 for (cred = wcache_cred_list; cred; cred = cred->next) {
2744
2745 TDB_DATA data;
2746 time_t t;
2747
2748 data = tdb_fetch(cache->tdb, string_tdb_data(cred->name));
2749 if (!data.dptr) {
2750 DEBUG(10,("wcache_remove_oldest_cached_creds: entry for [%s] not found\n",
2751 cred->name));
2752 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
2753 goto done;
2754 }
2755
2756 t = IVAL(data.dptr, 0);
2757 SAFE_FREE(data.dptr);
2758
2759 if (!oldest) {
2760 oldest = SMB_MALLOC_P(struct cred_list);
2761 if (oldest == NULL) {
2762 status = NT_STATUS_NO_MEMORY;
2763 goto done;
2764 }
2765
2766 fstrcpy(oldest->name, cred->name);
2767 oldest->created = t;
2768 continue;
2769 }
2770
2771 if (t < oldest->created) {
2772 fstrcpy(oldest->name, cred->name);
2773 oldest->created = t;
2774 }
2775 }
2776
2777 if (tdb_delete(cache->tdb, string_tdb_data(oldest->name)) == 0) {
2778 status = NT_STATUS_OK;
2779 } else {
2780 status = NT_STATUS_UNSUCCESSFUL;
2781 }
2782 done:
2783 SAFE_FREE(wcache_cred_list);
2784 SAFE_FREE(oldest);
2785
2786 return status;
2787 }
2788
2789 /* Change the global online/offline state. */
2790 bool set_global_winbindd_state_offline(void)
2791 {
2792 TDB_DATA data;
2793
2794 DEBUG(10,("set_global_winbindd_state_offline: offline requested.\n"));
2795
2796 /* Only go offline if someone has created
2797 the key "WINBINDD_OFFLINE" in the cache tdb. */
2798
2799 if (wcache == NULL || wcache->tdb == NULL) {
2800 DEBUG(10,("set_global_winbindd_state_offline: wcache not open yet.\n"));
2801 return false;
2802 }
2803
2804 if (!lp_winbind_offline_logon()) {
2805 DEBUG(10,("set_global_winbindd_state_offline: rejecting.\n"));
2806 return false;
2807 }
2808
2809 if (global_winbindd_offline_state) {
2810 /* Already offline. */
2811 return true;
2812 }
2813
2814 data = tdb_fetch_bystring( wcache->tdb, "WINBINDD_OFFLINE" );
2815
2816 if (!data.dptr || data.dsize != 4) {
2817 DEBUG(10,("set_global_winbindd_state_offline: offline state not set.\n"));
2818 SAFE_FREE(data.dptr);
2819 return false;
2820 } else {
2821 DEBUG(10,("set_global_winbindd_state_offline: offline state set.\n"));
2822 global_winbindd_offline_state = true;
2823 SAFE_FREE(data.dptr);
2824 return true;
2825 }
2826 }
2827
2828 void set_global_winbindd_state_online(void)
2829 {
2830 DEBUG(10,("set_global_winbindd_state_online: online requested.\n"));
2831
2832 if (!lp_winbind_offline_logon()) {
2833 DEBUG(10,("set_global_winbindd_state_online: rejecting.\n"));
2834 return;
2835 }
2836
2837 if (!global_winbindd_offline_state) {
2838 /* Already online. */
2839 return;
2840 }
2841 global_winbindd_offline_state = false;
2842
2843 if (!wcache->tdb) {
2844 return;
2845 }
2846
2847 /* Ensure there is no key "WINBINDD_OFFLINE" in the cache tdb. */
2848 tdb_delete_bystring(wcache->tdb, "WINBINDD_OFFLINE");
2849 }
2850
2851 bool get_global_winbindd_state_offline(void)
2852 {
2853 return global_winbindd_offline_state;
2854 }
2855
2856 /***********************************************************************
2857 Validate functions for all possible cache tdb keys.
2858 ***********************************************************************/
2859
2860 static struct cache_entry *create_centry_validate(const char *kstr, TDB_DATA data,
2861 struct tdb_validation_status *state)
2862 {
2863 struct cache_entry *centry;
2864
2865 centry = SMB_XMALLOC_P(struct cache_entry);
2866 centry->data = (unsigned char *)memdup(data.dptr, data.dsize);
2867 if (!centry->data) {
2868 SAFE_FREE(centry);
2869 return NULL;
2870 }
2871 centry->len = data.dsize;
2872 centry->ofs = 0;
2873
2874 if (centry->len < 8) {
2875 /* huh? corrupt cache? */
2876 DEBUG(0,("create_centry_validate: Corrupt cache for key %s (len < 8) ?\n", kstr));
2877 centry_free(centry);
2878 state->bad_entry = true;
2879 state->success = false;
2880 return NULL;
2881 }
2882
2883 centry->status = NT_STATUS(centry_uint32(centry));
2884 centry->sequence_number = centry_uint32(centry);
2885 return centry;
2886 }
2887
2888 static int validate_seqnum(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
2889 struct tdb_validation_status *state)
2890 {
2891 if (dbuf.dsize != 8) {
2892 DEBUG(0,("validate_seqnum: Corrupt cache for key %s (len %u != 8) ?\n",
2893 keystr, (unsigned int)dbuf.dsize ));
2894 state->bad_entry = true;
2895 return 1;
2896 }
2897 return 0;
2898 }
2899
2900 static int validate_ns(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
2901 struct tdb_validation_status *state)
2902 {
2903 struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
2904 if (!centry) {
2905 return 1;
2906 }
2907
2908 (void)centry_uint32(centry);
2909 if (NT_STATUS_IS_OK(centry->status)) {
2910 DOM_SID sid;
2911 (void)centry_sid(centry, mem_ctx, &sid);
2912 }
2913
2914 centry_free(centry);
2915
2916 if (!(state->success)) {
2917 return 1;
2918 }
2919 DEBUG(10,("validate_ns: %s ok\n", keystr));
2920 return 0;
2921 }
2922
2923 static int validate_sn(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
2924 struct tdb_validation_status *state)
2925 {
2926 struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
2927 if (!centry) {
2928 return 1;
2929 }
2930
2931 if (NT_STATUS_IS_OK(centry->status)) {
2932 (void)centry_uint32(centry);
2933 (void)centry_string(centry, mem_ctx);
2934 (void)centry_string(centry, mem_ctx);
2935 }
2936
2937 centry_free(centry);
2938
2939 if (!(state->success)) {
2940 return 1;
2941 }
2942 DEBUG(10,("validate_sn: %s ok\n", keystr));
2943 return 0;
2944 }
2945
2946 static int validate_u(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
2947 struct tdb_validation_status *state)
2948 {
2949 struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
2950 DOM_SID sid;
2951
2952 if (!centry) {
2953 return 1;
2954 }
2955
2956 (void)centry_string(centry, mem_ctx);
2957 (void)centry_string(centry, mem_ctx);
2958 (void)centry_string(centry, mem_ctx);
2959 (void)centry_string(centry, mem_ctx);
2960 (void)centry_uint32(centry);
2961 (void)centry_sid(centry, mem_ctx, &sid);
2962 (void)centry_sid(centry, mem_ctx, &sid);
2963
2964 centry_free(centry);
2965
2966 if (!(state->success)) {
2967 return 1;
2968 }
2969 DEBUG(10,("validate_u: %s ok\n", keystr));
2970 return 0;
2971 }
2972
2973 static int validate_loc_pol(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
2974 struct tdb_validation_status *state)
2975 {
2976 struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
2977
2978 if (!centry) {
2979 return 1;
2980 }
2981
2982 (void)centry_nttime(centry);
2983 (void)centry_nttime(centry);
2984 (void)centry_uint16(centry);
2985
2986 centry_free(centry);
2987
2988 if (!(state->success)) {
2989 return 1;
2990 }
2991 DEBUG(10,("validate_loc_pol: %s ok\n", keystr));
2992 return 0;
2993 }
2994
2995 static int validate_pwd_pol(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
2996 struct tdb_validation_status *state)
2997 {
2998 struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
2999
3000 if (!centry) {
3001 return 1;
3002 }
3003
3004 (void)centry_uint16(centry);
3005 (void)centry_uint16(centry);
3006 (void)centry_uint32(centry);
3007 (void)centry_nttime(centry);
3008 (void)centry_nttime(centry);
3009
3010 centry_free(centry);
3011
3012 if (!(state->success)) {
3013 return 1;
3014 }
3015 DEBUG(10,("validate_pwd_pol: %s ok\n", keystr));
3016 return 0;
3017 }
3018
3019 static int validate_cred(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
3020 struct tdb_validation_status *state)
3021 {
3022 struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
3023
3024 if (!centry) {
3025 return 1;
3026 }
3027
3028 (void)centry_time(centry);
3029 (void)centry_hash16(centry, mem_ctx);
3030
3031 /* We only have 17 bytes more data in the salted cred case. */
3032 if (centry->len - centry->ofs == 17) {
3033 (void)centry_hash16(centry, mem_ctx);
3034 }
3035
3036 centry_free(centry);
3037
3038 if (!(state->success)) {
3039 return 1;
3040 }
3041 DEBUG(10,("validate_cred: %s ok\n", keystr));
3042 return 0;
3043 }
3044
3045 static int validate_ul(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
3046 struct tdb_validation_status *state)
3047 {
3048 struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
3049 int32 num_entries, i;
3050
3051 if (!centry) {
3052 return 1;
3053 }
3054
3055 num_entries = (int32)centry_uint32(centry);
3056
3057 for (i=0; i< num_entries; i++) {
3058 DOM_SID sid;
3059 (void)centry_string(centry, mem_ctx);
3060 (void)centry_string(centry, mem_ctx);
3061 (void)centry_string(centry, mem_ctx);
3062 (void)centry_string(centry, mem_ctx);
3063 (void)centry_sid(centry, mem_ctx, &sid);
3064 (void)centry_sid(centry, mem_ctx, &sid);
3065 }
3066
3067 centry_free(centry);
3068
3069 if (!(state->success)) {
3070 return 1;
3071 }
3072 DEBUG(10,("validate_ul: %s ok\n", keystr));
3073 return 0;
3074 }
3075
3076 static int validate_gl(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
3077 struct tdb_validation_status *state)
3078 {
3079 struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
3080 int32 num_entries, i;
3081
3082 if (!centry) {
3083 return 1;
3084 }
3085
3086 num_entries = centry_uint32(centry);
3087
3088 for (i=0; i< num_entries; i++) {
3089 (void)centry_string(centry, mem_ctx);
3090 (void)centry_string(centry, mem_ctx);
3091 (void)centry_uint32(centry);
3092 }
3093
3094 centry_free(centry);
3095
3096 if (!(state->success)) {
3097 return 1;
3098 }
3099 DEBUG(10,("validate_gl: %s ok\n", keystr));
3100 return 0;
3101 }
3102
3103 static int validate_ug(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
3104 struct tdb_validation_status *state)
3105 {
3106 struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
3107 int32 num_groups, i;
3108
3109 if (!centry) {
3110 return 1;
3111 }
3112
3113 num_groups = centry_uint32(centry);
3114
3115 for (i=0; i< num_groups; i++) {
3116 DOM_SID sid;
3117 centry_sid(centry, mem_ctx, &sid);
3118 }
3119
3120 centry_free(centry);
3121
3122 if (!(state->success)) {
3123 return 1;
3124 }
3125 DEBUG(10,("validate_ug: %s ok\n", keystr));
3126 return 0;
3127 }
3128
3129 static int validate_ua(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
3130 struct tdb_validation_status *state)
3131 {
3132 struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
3133 int32 num_aliases, i;
3134
3135 if (!centry) {
3136 return 1;
3137 }
3138
3139 num_aliases = centry_uint32(centry);
3140
3141 for (i=0; i < num_aliases; i++) {
3142 (void)centry_uint32(centry);
3143 }
3144
3145 centry_free(centry);
3146
3147 if (!(state->success)) {
3148 return 1;
3149 }
3150 DEBUG(10,("validate_ua: %s ok\n", keystr));
3151 return 0;
3152 }
3153
3154 static int validate_gm(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
3155 struct tdb_validation_status *state)
3156 {
3157 struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
3158 int32 num_names, i;
3159
3160 if (!centry) {
3161 return 1;
3162 }
3163
3164 num_names = centry_uint32(centry);
3165
3166 for (i=0; i< num_names; i++) {
3167 DOM_SID sid;
3168 centry_sid(centry, mem_ctx, &sid);
3169 (void)centry_string(centry, mem_ctx);
3170 (void)centry_uint32(centry);
3171 }
3172
3173 centry_free(centry);
3174
3175 if (!(state->success)) {
3176 return 1;
3177 }
3178 DEBUG(10,("validate_gm: %s ok\n", keystr));
3179 return 0;
3180 }
3181
3182 static int validate_dr(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
3183 struct tdb_validation_status *state)
3184 {
3185 /* Can't say anything about this other than must be nonzero. */
3186 if (dbuf.dsize == 0) {
3187 DEBUG(0,("validate_dr: Corrupt cache for key %s (len == 0) ?\n",
3188 keystr));
3189 state->bad_entry = true;
3190 state->success = false;
3191 return 1;
3192 }
3193
3194 DEBUG(10,("validate_dr: %s ok\n", keystr));
3195 return 0;
3196 }
3197
3198 static int validate_de(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
3199 struct tdb_validation_status *state)
3200 {
3201 /* Can't say anything about this other than must be nonzero. */
3202 if (dbuf.dsize == 0) {
3203 DEBUG(0,("validate_de: Corrupt cache for key %s (len == 0) ?\n",
3204 keystr));
3205 state->bad_entry = true;
3206 state->success = false;
3207 return 1;
3208 }
3209
3210 DEBUG(10,("validate_de: %s ok\n", keystr));
3211 return 0;
3212 }
3213
3214 static int validate_pwinfo(TALLOC_CTX *mem_ctx, const char *keystr,
3215 TDB_DATA dbuf, struct tdb_validation_status *state)
3216 {
3217 struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
3218
3219 if (!centry) {
3220 return 1;
3221 }
3222
3223 (void)centry_string(centry, mem_ctx);
3224 (void)centry_string(centry, mem_ctx);
3225 (void)centry_string(centry, mem_ctx);
3226 (void)centry_uint32(centry);
3227
3228 centry_free(centry);
3229
3230 if (!(state->success)) {
3231 return 1;
3232 }
3233 DEBUG(10,("validate_pwinfo: %s ok\n", keystr));
3234 return 0;
3235 }
3236
3237 static int validate_trustdoms(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
3238 struct tdb_validation_status *state)
3239 {
3240 struct cache_entry *centry = create_centry_validate(keystr, dbuf, state);
3241 int32 num_domains, i;
3242
3243 if (!centry) {
3244 return 1;
3245 }
3246
3247 num_domains = centry_uint32(centry);
3248
3249 for (i=0; i< num_domains; i++) {
3250 DOM_SID sid;
3251 (void)centry_string(centry, mem_ctx);
3252 (void)centry_string(centry, mem_ctx);
3253 (void)centry_sid(centry, mem_ctx, &sid);
3254 }
3255
3256 centry_free(centry);
3257
3258 if (!(state->success)) {
3259 return 1;
3260 }
3261 DEBUG(10,("validate_trustdoms: %s ok\n", keystr));
3262 return 0;
3263 }
3264
3265 static int validate_trustdomcache(TALLOC_CTX *mem_ctx, const char *keystr,
3266 TDB_DATA dbuf,
3267 struct tdb_validation_status *state)
3268 {
3269 if (dbuf.dsize == 0) {
3270 DEBUG(0, ("validate_trustdomcache: Corrupt cache for "
3271 "key %s (len ==0) ?\n", keystr));
3272 state->bad_entry = true;
3273 state->success = false;
3274 return 1;
3275 }
3276
3277 DEBUG(10, ("validate_trustdomcache: %s ok\n", keystr));
3278 DEBUGADD(10, (" Don't trust me, I am a DUMMY!\n"));
3279 return 0;
3280 }
3281
3282 static int validate_offline(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
3283 struct tdb_validation_status *state)
3284 {
3285 if (dbuf.dsize != 4) {
3286 DEBUG(0,("validate_offline: Corrupt cache for key %s (len %u != 4) ?\n",
3287 keystr, (unsigned int)dbuf.dsize ));
3288 state->bad_entry = true;
3289 state->success = false;
3290 return 1;
3291 }
3292 DEBUG(10,("validate_offline: %s ok\n", keystr));
3293 return 0;
3294 }
3295
3296 static int validate_cache_version(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf,
3297 struct tdb_validation_status *state)
3298 {
3299 if (dbuf.dsize != 4) {
3300 DEBUG(0, ("validate_cache_version: Corrupt cache for "
3301 "key %s (len %u != 4) ?\n",
3302 keystr, (unsigned int)dbuf.dsize));
3303 state->bad_entry = true;
3304 state->success = false;
3305 return 1;
3306 }
3307
3308 DEBUG(10, ("validate_cache_version: %s ok\n", keystr));
3309 return 0;
3310 }
3311
3312 /***********************************************************************
3313 A list of all possible cache tdb keys with associated validation
3314 functions.
3315 ***********************************************************************/
3316
3317 struct key_val_struct {
3318 const char *keyname;
3319 int (*validate_data_fn)(TALLOC_CTX *mem_ctx, const char *keystr, TDB_DATA dbuf, struct tdb_validation_status* state);
3320 } key_val[] = {
3321 {"SEQNUM/", validate_seqnum},
3322 {"NS/", validate_ns},
3323 {"SN/", validate_sn},
3324 {"U/", validate_u},
3325 {"LOC_POL/", validate_loc_pol},
3326 {"PWD_POL/", validate_pwd_pol},
3327 {"CRED/", validate_cred},
3328 {"UL/", validate_ul},
3329 {"GL/", validate_gl},
3330 {"UG/", validate_ug},
3331 {"UA", validate_ua},
3332 {"GM/", validate_gm},
3333 {"DR/", validate_dr},
3334 {"DE/", validate_de},
3335 {"NSS/PWINFO/", validate_pwinfo},
3336 {"TRUSTDOMS/", validate_trustdoms},
3337 {"TRUSTDOMCACHE/", validate_trustdomcache},
3338 {"WINBINDD_OFFLINE", validate_offline},
3339 {WINBINDD_CACHE_VERSION_KEYSTR, validate_cache_version},
3340 {NULL, NULL}
3341 };
3342
3343 /***********************************************************************
3344 Function to look at every entry in the tdb and validate it as far as
3345 possible.
3346 ***********************************************************************/
3347
3348 static int cache_traverse_validate_fn(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf, void *state)
3349 {
3350 int i;
3351 unsigned int max_key_len = 1024;
3352 struct tdb_validation_status *v_state = (struct tdb_validation_status *)state;
3353
3354 /* Paranoia check. */
3355 if (strncmp("UA/", (const char *)kbuf.dptr, 3) == 0) {
3356 max_key_len = 1024 * 1024;
3357 }
3358 if (kbuf.dsize > max_key_len) {
3359 DEBUG(0, ("cache_traverse_validate_fn: key length too large: "
3360 "(%u) > (%u)\n\n",
3361 (unsigned int)kbuf.dsize, (unsigned int)max_key_len));
3362 return 1;
3363 }
3364
3365 for (i = 0; key_val[i].keyname; i++) {
3366 size_t namelen = strlen(key_val[i].keyname);
3367 if (kbuf.dsize >= namelen && (
3368 strncmp(key_val[i].keyname, (const char *)kbuf.dptr, namelen)) == 0) {
3369 TALLOC_CTX *mem_ctx;
3370 char *keystr;
3371 int ret;
3372
3373 keystr = SMB_MALLOC_ARRAY(char, kbuf.dsize+1);
3374 if (!keystr) {
3375 return 1;
3376 }
3377 memcpy(keystr, kbuf.dptr, kbuf.dsize);
3378 keystr[kbuf.dsize] = '\0';
3379
3380 mem_ctx = talloc_init("validate_ctx");
3381 if (!mem_ctx) {
3382 SAFE_FREE(keystr);
3383 return 1;
3384 }
3385
3386 ret = key_val[i].validate_data_fn(mem_ctx, keystr, dbuf,
3387 v_state);
3388
3389 SAFE_FREE(keystr);
3390 talloc_destroy(mem_ctx);
3391 return ret;
3392 }
3393 }
3394
3395 DEBUG(0,("cache_traverse_validate_fn: unknown cache entry\nkey :\n"));
3396 dump_data(0, (uint8 *)kbuf.dptr, kbuf.dsize);
3397 DEBUG(0,("data :\n"));
3398 dump_data(0, (uint8 *)dbuf.dptr, dbuf.dsize);
3399 v_state->unknown_key = true;
3400 v_state->success = false;
3401 return 1; /* terminate. */
3402 }
3403
3404 static void validate_panic(const char *const why)
3405 {
3406 DEBUG(0,("validating cache: would panic %s\n", why ));
3407 DEBUGADD(0, ("exiting instead (cache validation mode)\n"));
3408 exit(47);
3409 }
3410
3411 /***********************************************************************
3412 Try and validate every entry in the winbindd cache. If we fail here,
3413 delete the cache tdb and return non-zero.
3414 ***********************************************************************/
3415
3416 int winbindd_validate_cache(void)
3417 {
3418 int ret = -1;
3419 const char *tdb_path = lock_path("winbindd_cache.tdb");
3420 TDB_CONTEXT *tdb = NULL;
3421
3422 DEBUG(10, ("winbindd_validate_cache: replacing panic function\n"));
3423 smb_panic_fn = validate_panic;
3424
3425
3426 tdb = tdb_open_log(tdb_path,
3427 WINBINDD_CACHE_TDB_DEFAULT_HASH_SIZE,
3428 ( lp_winbind_offline_logon()
3429 ? TDB_DEFAULT
3430 : TDB_DEFAULT | TDB_CLEAR_IF_FIRST ),
3431 O_RDWR|O_CREAT,
3432 0600);
3433 if (!tdb) {
3434 DEBUG(0, ("winbindd_validate_cache: "
3435 "error opening/initializing tdb\n"));
3436 goto done;
3437 }
3438 tdb_close(tdb);
3439
3440 ret = tdb_validate_and_backup(tdb_path, cache_traverse_validate_fn);
3441
3442 if (ret != 0) {
3443 DEBUG(10, ("winbindd_validate_cache: validation not successful.\n"));
3444 DEBUGADD(10, ("removing tdb %s.\n", tdb_path));
3445 unlink(tdb_path);
3446 }
3447
3448 done:
3449 DEBUG(10, ("winbindd_validate_cache: restoring panic function\n"));
3450 smb_panic_fn = smb_panic;
3451 return ret;
3452 }
3453
3454 /***********************************************************************
3455 Try and validate every entry in the winbindd cache.
3456 ***********************************************************************/
3457
3458 int winbindd_validate_cache_nobackup(void)
3459 {
3460 int ret = -1;
3461 const char *tdb_path = lock_path("winbindd_cache.tdb");
3462
3463 DEBUG(10, ("winbindd_validate_cache: replacing panic function\n"));
3464 smb_panic_fn = validate_panic;
3465
3466
3467 if (wcache == NULL || wcache->tdb == NULL) {
3468 ret = tdb_validate_open(tdb_path, cache_traverse_validate_fn);
3469 } else {
3470 ret = tdb_validate(wcache->tdb, cache_traverse_validate_fn);
3471 }
3472
3473 if (ret != 0) {
3474 DEBUG(10, ("winbindd_validate_cache_nobackup: validation not "
3475 "successful.\n"));
3476 }
3477
3478 DEBUG(10, ("winbindd_validate_cache_nobackup: restoring panic "
3479 "function\n"));
3480 smb_panic_fn = smb_panic;
3481 return ret;
3482 }
3483
3484 bool winbindd_cache_validate_and_initialize(void)
3485 {
3486 close_winbindd_cache();
3487
3488 if (lp_winbind_offline_logon()) {
3489 if (winbindd_validate_cache() < 0) {
3490 DEBUG(0, ("winbindd cache tdb corrupt and no backup "
3491 "could be restored.\n"));
3492 }
3493 }
3494
3495 return initialize_winbindd_cache();
3496 }
3497
3498 /*********************************************************************
3499 ********************************************************************/
3500
3501 static bool add_wbdomain_to_tdc_array( struct winbindd_domain *new_dom,
3502 struct winbindd_tdc_domain **domains,
3503 size_t *num_domains )
3504 {
3505 struct winbindd_tdc_domain *list = NULL;
3506 size_t idx;
3507 int i;
3508 bool set_only = false;
3509
3510 /* don't allow duplicates */
3511
3512 idx = *num_domains;
3513 list = *domains;
3514
3515 for ( i=0; i< (*num_domains); i++ ) {
3516 if ( strequal( new_dom->name, list[i].domain_name ) ) {
3517 DEBUG(10,("add_wbdomain_to_tdc_array: Found existing record for %s\n",
3518 new_dom->name));
3519 idx = i;
3520 set_only = true;
3521
3522 break;
3523 }
3524 }
3525
3526 if ( !set_only ) {
3527 if ( !*domains ) {
3528 list = TALLOC_ARRAY( NULL, struct winbindd_tdc_domain, 1 );
3529 idx = 0;
3530 } else {
3531 list = TALLOC_REALLOC_ARRAY( *domains, *domains,
3532 struct winbindd_tdc_domain,
3533 (*num_domains)+1);
3534 idx = *num_domains;
3535 }
3536
3537 ZERO_STRUCT( list[idx] );
3538 }
3539
3540 if ( !list )
3541 return false;
3542
3543 list[idx].domain_name = talloc_strdup( list, new_dom->name );
3544 list[idx].dns_name = talloc_strdup( list, new_dom->alt_name );
3545
3546 if ( !is_null_sid( &new_dom->sid ) )
3547 sid_copy( &list[idx].sid, &new_dom->sid );
3548
3549 if ( new_dom->domain_flags != 0x0 )
3550 list[idx].trust_flags = new_dom->domain_flags;
3551
3552 if ( new_dom->domain_type != 0x0 )
3553 list[idx].trust_type = new_dom->domain_type;
3554
3555 if ( new_dom->domain_trust_attribs != 0x0 )
3556 list[idx].trust_attribs = new_dom->domain_trust_attribs;
3557
3558 if ( !set_only ) {
3559 *domains = list;
3560 *num_domains = idx + 1;
3561 }
3562
3563 return true;
3564 }
3565
3566 /*********************************************************************
3567 ********************************************************************/
3568
3569 static TDB_DATA make_tdc_key( const char *domain_name )
3570 {
3571 char *keystr = NULL;
3572 TDB_DATA key = { NULL, 0 };
3573
3574 if ( !domain_name ) {
3575 DEBUG(5,("make_tdc_key: Keyname workgroup is NULL!\n"));
3576 return key;
3577 }
3578
3579
3580 asprintf( &keystr, "TRUSTDOMCACHE/%s", domain_name );
3581 key = string_term_tdb_data(keystr);
3582
3583 return key;
3584 }
3585
3586 /*********************************************************************
3587 ********************************************************************/
3588
3589 static int pack_tdc_domains( struct winbindd_tdc_domain *domains,
3590 size_t num_domains,
3591 unsigned char **buf )
3592 {
3593 unsigned char *buffer = NULL;
3594 int len = 0;
3595 int buflen = 0;
3596 int i = 0;
3597
3598 DEBUG(10,("pack_tdc_domains: Packing %d trusted domains\n",
3599 (int)num_domains));
3600
3601 buflen = 0;
3602
3603 again:
3604 len = 0;
3605
3606 /* Store the number of array items first */
3607 len += tdb_pack( buffer+len, buflen-len, "d",
3608 num_domains );
3609
3610 /* now pack each domain trust record */
3611 for ( i=0; i<num_domains; i++ ) {
3612
3613 fstring tmp;
3614
3615 if ( buflen > 0 ) {
3616 DEBUG(10,("pack_tdc_domains: Packing domain %s (%s)\n",
3617 domains[i].domain_name,
3618 domains[i].dns_name ? domains[i].dns_name : "UNKNOWN" ));
3619 }
3620
3621 len += tdb_pack( buffer+len, buflen-len, "fffddd",
3622 domains[i].domain_name,
3623 domains[i].dns_name,
3624 sid_to_fstring(tmp, &domains[i].sid),
3625 domains[i].trust_flags,
3626 domains[i].trust_attribs,
3627 domains[i].trust_type );
3628 }
3629
3630 if ( buflen < len ) {
3631 SAFE_FREE(buffer);
3632 if ( (buffer = SMB_MALLOC_ARRAY(unsigned char, len)) == NULL ) {
3633 DEBUG(0,("pack_tdc_domains: failed to alloc buffer!\n"));
3634 buflen = -1;
3635 goto done;
3636 }
3637 buflen = len;
3638 goto again;
3639 }
3640
3641 *buf = buffer;
3642
3643 done:
3644 return buflen;
3645 }
3646
3647 /*********************************************************************
3648 ********************************************************************/
3649
3650 static size_t unpack_tdc_domains( unsigned char *buf, int buflen,
3651 struct winbindd_tdc_domain **domains )
3652 {
3653 fstring domain_name, dns_name, sid_string;
3654 uint32 type, attribs, flags;
3655 int num_domains;
3656 int len = 0;
3657 int i;
3658 struct winbindd_tdc_domain *list = NULL;
3659
3660 /* get the number of domains */
3661 len += tdb_unpack( buf+len, buflen-len, "d", &num_domains);
3662 if ( len == -1 ) {
3663 DEBUG(5,("unpack_tdc_domains: Failed to unpack domain array\n"));
3664 return 0;
3665 }
3666
3667 list = TALLOC_ARRAY( NULL, struct winbindd_tdc_domain, num_domains );
3668 if ( !list ) {
3669 DEBUG(0,("unpack_tdc_domains: Failed to talloc() domain list!\n"));
3670 return 0;
3671 }
3672
3673 for ( i=0; i<num_domains; i++ ) {
3674 len += tdb_unpack( buf+len, buflen-len, "fffddd",
3675 domain_name,
3676 dns_name,
3677 sid_string,
3678 &flags,
3679 &attribs,
3680 &type );
3681
3682 if ( len == -1 ) {
3683 DEBUG(5,("unpack_tdc_domains: Failed to unpack domain array\n"));
3684 TALLOC_FREE( list );
3685 return 0;
3686 }
3687
3688 DEBUG(11,("unpack_tdc_domains: Unpacking domain %s (%s) "
3689 "SID %s, flags = 0x%x, attribs = 0x%x, type = 0x%x\n",
3690 domain_name, dns_name, sid_string,
3691 flags, attribs, type));
3692
3693 list[i].domain_name = talloc_strdup( list, domain_name );
3694 list[i].dns_name = talloc_strdup( list, dns_name );
3695 if ( !string_to_sid( &(list[i].sid), sid_string ) ) {
3696 DEBUG(10,("unpack_tdc_domains: no SID for domain %s\n",
3697 domain_name));
3698 }
3699 list[i].trust_flags = flags;
3700 list[i].trust_attribs = attribs;
3701 list[i].trust_type = type;
3702 }
3703
3704 *domains = list;
3705
3706 return num_domains;
3707 }
3708
3709 /*********************************************************************
3710 ********************************************************************/
3711
3712 static bool wcache_tdc_store_list( struct winbindd_tdc_domain *domains, size_t num_domains )
3713 {
3714 TDB_DATA key = make_tdc_key( lp_workgroup() );
3715 TDB_DATA data = { NULL, 0 };
3716 int ret;
3717
3718 if ( !key.dptr )
3719 return false;
3720
3721 /* See if we were asked to delete the cache entry */
3722
3723 if ( !domains ) {
3724 ret = tdb_delete( wcache->tdb, key );
3725 goto done;
3726 }
3727
3728 data.dsize = pack_tdc_domains( domains, num_domains, &data.dptr );
3729
3730 if ( !data.dptr ) {
3731 ret = -1;
3732 goto done;
3733 }
3734
3735 ret = tdb_store( wcache->tdb, key, data, 0 );
3736
3737 done:
3738 SAFE_FREE( data.dptr );
3739 SAFE_FREE( key.dptr );
3740
3741 return ( ret != -1 );
3742 }
3743
3744 /*********************************************************************
3745 ********************************************************************/
3746
3747 bool wcache_tdc_fetch_list( struct winbindd_tdc_domain **domains, size_t *num_domains )
3748 {
3749 TDB_DATA key = make_tdc_key( lp_workgroup() );
3750 TDB_DATA data = { NULL, 0 };
3751
3752 *domains = NULL;
3753 *num_domains = 0;
3754
3755 if ( !key.dptr )
3756 return false;
3757
3758 data = tdb_fetch( wcache->tdb, key );
3759
3760 SAFE_FREE( key.dptr );
3761
3762 if ( !data.dptr )
3763 return false;
3764
3765 *num_domains = unpack_tdc_domains( data.dptr, data.dsize, domains );
3766
3767 SAFE_FREE( data.dptr );
3768
3769 if ( !*domains )
3770 return false;
3771
3772 return true;
3773 }
3774
3775 /*********************************************************************
3776 ********************************************************************/
3777
3778 bool wcache_tdc_add_domain( struct winbindd_domain *domain )
3779 {
3780 struct winbindd_tdc_domain *dom_list = NULL;
3781 size_t num_domains = 0;
3782 bool ret = false;
3783
3784 DEBUG(10,("wcache_tdc_add_domain: Adding domain %s (%s), SID %s, "
3785 "flags = 0x%x, attributes = 0x%x, type = 0x%x\n",
3786 domain->name, domain->alt_name,
3787 sid_string_dbg(&domain->sid),
3788 domain->domain_flags,
3789 domain->domain_trust_attribs,
3790 domain->domain_type));
3791
3792 if ( !init_wcache() ) {
3793 return false;
3794 }
3795
3796 /* fetch the list */
3797
3798 wcache_tdc_fetch_list( &dom_list, &num_domains );
3799
3800 /* add the new domain */
3801
3802 if ( !add_wbdomain_to_tdc_array( domain, &dom_list, &num_domains ) ) {
3803 goto done;
3804 }
3805
3806 /* pack the domain */
3807
3808 if ( !wcache_tdc_store_list( dom_list, num_domains ) ) {
3809 goto done;
3810 }
3811
3812 /* Success */
3813
3814 ret = true;
3815 done:
3816 TALLOC_FREE( dom_list );
3817
3818 return ret;
3819 }
3820
3821 /*********************************************************************
3822 ********************************************************************/
3823
3824 struct winbindd_tdc_domain * wcache_tdc_fetch_domain( TALLOC_CTX *ctx, const char *name )
3825 {
3826 struct winbindd_tdc_domain *dom_list = NULL;
3827 size_t num_domains = 0;
3828 int i;
3829 struct winbindd_tdc_domain *d = NULL;
3830
3831 DEBUG(10,("wcache_tdc_fetch_domain: Searching for domain %s\n", name));
3832
3833 if ( !init_wcache() ) {
3834 return false;
3835 }
3836
3837 /* fetch the list */
3838
3839 wcache_tdc_fetch_list( &dom_list, &num_domains );
3840
3841 for ( i=0; i<num_domains; i++ ) {
3842 if ( strequal(name, dom_list[i].domain_name) ||
3843 strequal(name, dom_list[i].dns_name) )
3844 {
3845 DEBUG(10,("wcache_tdc_fetch_domain: Found domain %s\n",
3846 name));
3847
3848 d = TALLOC_P( ctx, struct winbindd_tdc_domain );
3849 if ( !d )
3850 break;
3851
3852 d->domain_name = talloc_strdup( d, dom_list[i].domain_name );
3853 d->dns_name = talloc_strdup( d, dom_list[i].dns_name );
3854 sid_copy( &d->sid, &dom_list[i].sid );
3855 d->trust_flags = dom_list[i].trust_flags;
3856 d->trust_type = dom_list[i].trust_type;
3857 d->trust_attribs = dom_list[i].trust_attribs;
3858
3859 break;
3860 }
3861 }
3862
3863 TALLOC_FREE( dom_list );
3864
3865 return d;
3866 }
3867
3868
3869 /*********************************************************************
3870 ********************************************************************/
3871
3872 void wcache_tdc_clear( void )
3873 {
3874 if ( !init_wcache() )
3875 return;
3876
3877 wcache_tdc_store_list( NULL, 0 );
3878
3879 return;
3880 }
3881
3882
3883 /*********************************************************************
3884 ********************************************************************/
3885
3886 static void wcache_save_user_pwinfo(struct winbindd_domain *domain,
3887 NTSTATUS status,
3888 const DOM_SID *user_sid,
3889 const char *homedir,
3890 const char *shell,
3891 const char *gecos,
3892 uint32 gid)
3893 {
3894 struct cache_entry *centry;
3895 fstring tmp;
3896
3897 if ( (centry = centry_start(domain, status)) == NULL )
3898 return;
3899
3900 centry_put_string( centry, homedir );
3901 centry_put_string( centry, shell );
3902 centry_put_string( centry, gecos );
3903 centry_put_uint32( centry, gid );
3904
3905 centry_end(centry, "NSS/PWINFO/%s", sid_to_fstring(tmp, user_sid) );
3906
3907 DEBUG(10,("wcache_save_user_pwinfo: %s\n", sid_string_dbg(user_sid) ));
3908
3909 centry_free(centry);
3910 }
3911
3912 NTSTATUS nss_get_info_cached( struct winbindd_domain *domain,
3913 const DOM_SID *user_sid,
3914 TALLOC_CTX *ctx,
3915 ADS_STRUCT *ads, LDAPMessage *msg,
3916 char **homedir, char **shell, char **gecos,
3917 gid_t *p_gid)
3918 {
3919 struct winbind_cache *cache = get_cache(domain);
3920 struct cache_entry *centry = NULL;
3921 NTSTATUS nt_status;
3922 fstring tmp;
3923
3924 if (!cache->tdb)
3925 goto do_query;
3926
3927 centry = wcache_fetch(cache, domain, "NSS/PWINFO/%s",
3928 sid_to_fstring(tmp, user_sid));
3929
3930 if (!centry)
3931 goto do_query;
3932
3933 *homedir = centry_string( centry, ctx );
3934 *shell = centry_string( centry, ctx );
3935 *gecos = centry_string( centry, ctx );
3936 *p_gid = centry_uint32( centry );
3937
3938 centry_free(centry);
3939
3940 DEBUG(10,("nss_get_info_cached: [Cached] - user_sid %s\n",
3941 sid_string_dbg(user_sid)));
3942
3943 return NT_STATUS_OK;
3944
3945 do_query:
3946
3947 nt_status = nss_get_info( domain->name, user_sid, ctx, ads, msg,
3948 homedir, shell, gecos, p_gid );
3949
3950 if ( NT_STATUS_IS_OK(nt_status) ) {
3951 wcache_save_user_pwinfo( domain, nt_status, user_sid,
3952 *homedir, *shell, *gecos, *p_gid );
3953 }
3954
3955 if ( NT_STATUS_EQUAL( nt_status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND ) ) {
3956 DEBUG(5,("nss_get_info_cached: Setting domain %s offline\n",
3957 domain->name ));
3958 set_domain_offline( domain );
3959 }
3960
3961 return nt_status;
3962 }
3963
3964
3965 /* the cache backend methods are exposed via this structure */
3966 struct winbindd_methods cache_methods = {
3967 true,
3968 query_user_list,
3969 enum_dom_groups,
3970 enum_local_groups,
3971 name_to_sid,
3972 sid_to_name,
3973 rids_to_names,
3974 query_user,
3975 lookup_usergroups,
3976 lookup_useraliases,
3977 lookup_groupmem,
3978 sequence_number,
3979 lockout_policy,
3980 password_policy,
3981 trusted_domains
3982 };
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