?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
s4 dns: Move dns_transaction_udp to other helper functions
[Samba/gebeck_regimport.git] / source3 / registry / reg_backend_db.c
blob4d4aaeb4b54a33a2bd01c9300399e99e7cdecaf3
1 /*
2 * Unix SMB/CIFS implementation.
3 * Virtual Windows Registry Layer
4 * Copyright (C) Gerald Carter 2002-2005
5 * Copyright (C) Michael Adam 2007-2011
6 * Copyright (C) Gregor Beck 2011
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 3 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, see <http://www.gnu.org/licenses/>.
20 */
21
22 /* Implementation of internal registry database functions. */
23
24 #include "includes.h"
25 #include "system/filesys.h"
26 #include "registry.h"
27 #include "reg_db.h"
28 #include "reg_util_internal.h"
29 #include "reg_backend_db.h"
30 #include "reg_objects.h"
31 #include "nt_printing.h"
32 #include "util_tdb.h"
33 #include "dbwrap/dbwrap.h"
34 #include "dbwrap/dbwrap_open.h"
35 #include "../libcli/security/secdesc.h"
36
37 #undef DBGC_CLASS
38 #define DBGC_CLASS DBGC_REGISTRY
39
40 #define REGDB_VERSION_KEYNAME "INFO/version"
41
42 static struct db_context *regdb = NULL;
43 static int regdb_refcount;
44
45 static bool regdb_key_exists(struct db_context *db, const char *key);
46 static WERROR regdb_fetch_keys_internal(struct db_context *db, const char *key,
47 struct regsubkey_ctr *ctr);
48 static bool regdb_store_keys_internal(struct db_context *db, const char *key,
49 struct regsubkey_ctr *ctr);
50 static int regdb_fetch_values_internal(struct db_context *db, const char* key,
51 struct regval_ctr *values);
52 static NTSTATUS regdb_store_values_internal(struct db_context *db, const char *key,
53 struct regval_ctr *values);
54 static WERROR regdb_store_subkey_list(struct db_context *db, const char *parent,
55 const char *key);
56
57 static WERROR regdb_create_basekey(struct db_context *db, const char *key);
58 static WERROR regdb_create_subkey_internal(struct db_context *db,
59 const char *key,
60 const char *subkey);
61
62
63 struct regdb_trans_ctx {
64 NTSTATUS (*action)(struct db_context *, void *);
65 void *private_data;
66 };
67
68 static NTSTATUS regdb_trans_do_action(struct db_context *db, void *private_data)
69 {
70 NTSTATUS status;
71 int32_t version_id;
72 struct regdb_trans_ctx *ctx = (struct regdb_trans_ctx *)private_data;
73
74 status = dbwrap_fetch_int32(db, REGDB_VERSION_KEYNAME, &version_id);
75
76 if (!NT_STATUS_IS_OK(status)) {
77 DEBUG(0, ("ERROR: could not fetch registry db version: %s. "
78 "Denying access.\n", nt_errstr(status)));
79 return NT_STATUS_ACCESS_DENIED;
80 }
81
82 if (version_id != REGDB_CODE_VERSION) {
83 DEBUG(0, ("ERROR: changed registry version %d found while "
84 "trying to write to the registry. Version %d "
85 "expected. Denying access.\n",
86 version_id, REGDB_CODE_VERSION));
87 return NT_STATUS_ACCESS_DENIED;
88 }
89
90 status = ctx->action(db, ctx->private_data);
91 return status;
92 }
93
94 static WERROR regdb_trans_do(struct db_context *db,
95 NTSTATUS (*action)(struct db_context *, void *),
96 void *private_data)
97 {
98 NTSTATUS status;
99 struct regdb_trans_ctx ctx;
100
101
102 ctx.action = action;
103 ctx.private_data = private_data;
104
105 status = dbwrap_trans_do(db, regdb_trans_do_action, &ctx);
106
107 return ntstatus_to_werror(status);
108 }
109
110 /* List the deepest path into the registry. All part components will be created.*/
111
112 /* If you want to have a part of the path controlled by the tdb and part by
113 a virtual registry db (e.g. printing), then you have to list the deepest path.
114 For example,"HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion/Print"
115 allows the reg_db backend to handle everything up to
116 "HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion" and then we'll hook
117 the reg_printing backend onto the last component of the path (see
118 KEY_PRINTING_2K in include/rpc_reg.h) --jerry */
119
120 static const char *builtin_registry_paths[] = {
121 KEY_PRINTING_2K,
122 KEY_PRINTING_PORTS,
123 KEY_PRINTING,
124 KEY_PRINTING "\\Forms",
125 KEY_PRINTING "\\Printers",
126 KEY_PRINTING "\\Environments\\Windows NT x86\\Print Processors\\winprint",
127 KEY_SHARES,
128 KEY_EVENTLOG,
129 KEY_SMBCONF,
130 KEY_PERFLIB,
131 KEY_PERFLIB_009,
132 KEY_GROUP_POLICY,
133 KEY_SAMBA_GROUP_POLICY,
134 KEY_GP_MACHINE_POLICY,
135 KEY_GP_MACHINE_WIN_POLICY,
136 KEY_HKCU,
137 KEY_GP_USER_POLICY,
138 KEY_GP_USER_WIN_POLICY,
139 "HKLM\\Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\GPExtensions",
140 "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Print\\Monitors",
141 KEY_PROD_OPTIONS,
142 "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Terminal Server\\DefaultUserConfiguration",
143 KEY_TCPIP_PARAMS,
144 KEY_NETLOGON_PARAMS,
145 KEY_HKU,
146 KEY_HKCR,
147 KEY_HKPD,
148 KEY_HKPT,
149 NULL };
150
151 struct builtin_regkey_value {
152 const char *path;
153 const char *valuename;
154 uint32 type;
155 union {
156 const char *string;
157 uint32 dw_value;
158 } data;
159 };
160
161 static struct builtin_regkey_value builtin_registry_values[] = {
162 { KEY_PRINTING_PORTS,
163 SAMBA_PRINTER_PORT_NAME, REG_SZ, { "" } },
164 { KEY_PRINTING_2K,
165 "DefaultSpoolDirectory", REG_SZ, { "C:\\Windows\\System32\\Spool\\Printers" } },
166 { KEY_EVENTLOG,
167 "DisplayName", REG_SZ, { "Event Log" } },
168 { KEY_EVENTLOG,
169 "ErrorControl", REG_DWORD, { (char*)0x00000001 } },
170 { NULL, NULL, 0, { NULL } }
171 };
172
173 static WERROR create_key_recursive(struct db_context *db,
174 char *path,
175 const char *subkey)
176 {
177 WERROR werr;
178 char *p;
179
180 if (subkey == NULL) {
181 return WERR_INVALID_PARAM;
182 }
183
184 if (path == NULL) {
185 return regdb_create_basekey(db, subkey);
186 }
187
188 p = strrchr_m(path, '\\');
189
190 if (p == NULL) {
191 werr = create_key_recursive(db, NULL, path);
192 } else {
193 *p = '\0';
194 werr = create_key_recursive(db, path, p+1);
195 *p = '\\';
196 }
197
198 if (!W_ERROR_IS_OK(werr)) {
199 goto done;
200 }
201
202 werr = regdb_create_subkey_internal(db, path, subkey);
203
204 done:
205 return werr;
206 }
207
208 /**
209 * Initialize a key in the registry:
210 * create each component key of the specified path.
211 */
212 static WERROR init_registry_key_internal(struct db_context *db,
213 const char *add_path)
214 {
215 char *subkey, *key;
216 WERROR werr;
217 TALLOC_CTX *frame = talloc_stackframe();
218
219 if (add_path == NULL) {
220 werr = WERR_INVALID_PARAM;
221 goto done;
222 }
223
224 key = talloc_strdup(frame, add_path);
225
226 subkey = strrchr_m(key, '\\');
227 if (subkey == NULL) {
228 subkey = key;
229 key = NULL;
230 } else {
231 *subkey = '\0';
232 subkey++;
233 }
234
235 werr = create_key_recursive(db, key, subkey);
236
237 done:
238 talloc_free(frame);
239 return werr;
240 }
241
242 struct init_registry_key_context {
243 const char *add_path;
244 };
245
246 static NTSTATUS init_registry_key_action(struct db_context *db,
247 void *private_data)
248 {
249 struct init_registry_key_context *init_ctx =
250 (struct init_registry_key_context *)private_data;
251
252 return werror_to_ntstatus(init_registry_key_internal(
253 db, init_ctx->add_path));
254 }
255
256 /**
257 * Initialize a key in the registry:
258 * create each component key of the specified path,
259 * wrapped in one db transaction.
260 */
261 WERROR init_registry_key(const char *add_path)
262 {
263 struct init_registry_key_context init_ctx;
264
265 if (regdb_key_exists(regdb, add_path)) {
266 return WERR_OK;
267 }
268
269 init_ctx.add_path = add_path;
270
271 return regdb_trans_do(regdb,
272 init_registry_key_action,
273 &init_ctx);
274 }
275
276 /***********************************************************************
277 Open the registry data in the tdb
278 ***********************************************************************/
279
280 static void regdb_ctr_add_value(struct regval_ctr *ctr,
281 struct builtin_regkey_value *value)
282 {
283 switch(value->type) {
284 case REG_DWORD:
285 regval_ctr_addvalue(ctr, value->valuename, REG_DWORD,
286 (uint8_t *)&value->data.dw_value,
287 sizeof(uint32));
288 break;
289
290 case REG_SZ:
291 regval_ctr_addvalue_sz(ctr, value->valuename,
292 value->data.string);
293 break;
294
295 default:
296 DEBUG(0, ("regdb_ctr_add_value: invalid value type in "
297 "registry values [%d]\n", value->type));
298 }
299 }
300
301 static NTSTATUS init_registry_data_action(struct db_context *db,
302 void *private_data)
303 {
304 NTSTATUS status;
305 TALLOC_CTX *frame = talloc_stackframe();
306 struct regval_ctr *values;
307 int i;
308
309 /* loop over all of the predefined paths and add each component */
310
311 for (i=0; builtin_registry_paths[i] != NULL; i++) {
312 if (regdb_key_exists(db, builtin_registry_paths[i])) {
313 continue;
314 }
315 status = werror_to_ntstatus(init_registry_key_internal(db,
316 builtin_registry_paths[i]));
317 if (!NT_STATUS_IS_OK(status)) {
318 goto done;
319 }
320 }
321
322 /* loop over all of the predefined values and add each component */
323
324 for (i=0; builtin_registry_values[i].path != NULL; i++) {
325 WERROR werr;
326
327 werr = regval_ctr_init(frame, &values);
328 if (!W_ERROR_IS_OK(werr)) {
329 status = werror_to_ntstatus(werr);
330 goto done;
331 }
332
333 regdb_fetch_values_internal(db,
334 builtin_registry_values[i].path,
335 values);
336
337 /* preserve existing values across restarts. Only add new ones */
338
339 if (!regval_ctr_key_exists(values,
340 builtin_registry_values[i].valuename))
341 {
342 regdb_ctr_add_value(values,
343 &builtin_registry_values[i]);
344 status = regdb_store_values_internal(db,
345 builtin_registry_values[i].path,
346 values);
347 if (!NT_STATUS_IS_OK(status)) {
348 goto done;
349 }
350 }
351 TALLOC_FREE(values);
352 }
353
354 status = NT_STATUS_OK;
355
356 done:
357
358 TALLOC_FREE(frame);
359 return status;
360 }
361
362 WERROR init_registry_data(void)
363 {
364 WERROR werr;
365 TALLOC_CTX *frame = talloc_stackframe();
366 struct regval_ctr *values;
367 int i;
368
369 /*
370 * First, check for the existence of the needed keys and values.
371 * If all do already exist, we can save the writes.
372 */
373 for (i=0; builtin_registry_paths[i] != NULL; i++) {
374 if (!regdb_key_exists(regdb, builtin_registry_paths[i])) {
375 goto do_init;
376 }
377 }
378
379 for (i=0; builtin_registry_values[i].path != NULL; i++) {
380 werr = regval_ctr_init(frame, &values);
381 W_ERROR_NOT_OK_GOTO_DONE(werr);
382
383 regdb_fetch_values_internal(regdb,
384 builtin_registry_values[i].path,
385 values);
386 if (!regval_ctr_key_exists(values,
387 builtin_registry_values[i].valuename))
388 {
389 TALLOC_FREE(values);
390 goto do_init;
391 }
392
393 TALLOC_FREE(values);
394 }
395
396 werr = WERR_OK;
397 goto done;
398
399 do_init:
400
401 /*
402 * There are potentially quite a few store operations which are all
403 * indiviually wrapped in tdb transactions. Wrapping them in a single
404 * transaction gives just a single transaction_commit() to actually do
405 * its fsync()s. See tdb/common/transaction.c for info about nested
406 * transaction behaviour.
407 */
408
409 werr = regdb_trans_do(regdb,
410 init_registry_data_action,
411 NULL);
412
413 done:
414 TALLOC_FREE(frame);
415 return werr;
416 }
417
418 static int regdb_normalize_keynames_fn(struct db_record *rec,
419 void *private_data)
420 {
421 TALLOC_CTX *mem_ctx = talloc_tos();
422 const char *keyname;
423 NTSTATUS status;
424 TDB_DATA key;
425 TDB_DATA value;
426 struct db_context *db = (struct db_context *)private_data;
427
428 key = dbwrap_record_get_key(rec);
429 if (key.dptr == NULL || key.dsize == 0) {
430 return 0;
431 }
432
433 value = dbwrap_record_get_value(rec);
434
435 if (db == NULL) {
436 DEBUG(0, ("regdb_normalize_keynames_fn: ERROR: "
437 "NULL db context handed in via private_data\n"));
438 return 1;
439 }
440
441 if (strncmp((const char *)key.dptr, REGDB_VERSION_KEYNAME,
442 strlen(REGDB_VERSION_KEYNAME)) == 0)
443 {
444 return 0;
445 }
446
447 keyname = strchr((const char *)key.dptr, '/');
448 if (keyname) {
449 keyname = talloc_string_sub(mem_ctx,
450 (const char *)key.dptr,
451 "/",
452 "\\");
453
454 DEBUG(2, ("regdb_normalize_keynames_fn: Convert %s to %s\n",
455 (const char *)key.dptr,
456 keyname));
457
458 /* Delete the original record and store the normalized key */
459 status = dbwrap_record_delete(rec);
460 if (!NT_STATUS_IS_OK(status)) {
461 DEBUG(0,("regdb_normalize_keynames_fn: "
462 "tdb_delete for [%s] failed!\n",
463 (const char *)key.dptr));
464 return 1;
465 }
466
467 status = dbwrap_store_bystring(db, keyname, value, TDB_REPLACE);
468 if (!NT_STATUS_IS_OK(status)) {
469 DEBUG(0,("regdb_normalize_keynames_fn: "
470 "failed to store new record for [%s]!\n",
471 keyname));
472 return 1;
473 }
474 }
475
476 return 0;
477 }
478
479 static WERROR regdb_store_regdb_version(struct db_context *db, uint32_t version)
480 {
481 NTSTATUS status;
482 if (db == NULL) {
483 return WERR_CAN_NOT_COMPLETE;
484 }
485
486 status = dbwrap_trans_store_int32(db, REGDB_VERSION_KEYNAME, version);
487 if (!NT_STATUS_IS_OK(status)) {
488 DEBUG(1, ("regdb_store_regdb_version: error storing %s = %d: %s\n",
489 REGDB_VERSION_KEYNAME, version, nt_errstr(status)));
490 return ntstatus_to_werror(status);
491 } else {
492 DEBUG(10, ("regdb_store_regdb_version: stored %s = %d\n",
493 REGDB_VERSION_KEYNAME, version));
494 return WERR_OK;
495 }
496 }
497
498 static WERROR regdb_upgrade_v1_to_v2(struct db_context *db)
499 {
500 TALLOC_CTX *mem_ctx;
501 NTSTATUS status;
502 WERROR werr;
503
504 mem_ctx = talloc_stackframe();
505
506 status = dbwrap_traverse(db, regdb_normalize_keynames_fn, db, NULL);
507 if (!NT_STATUS_IS_OK(status)) {
508 werr = WERR_REG_IO_FAILURE;
509 goto done;
510 }
511
512 werr = regdb_store_regdb_version(db, REGDB_VERSION_V2);
513
514 done:
515 talloc_free(mem_ctx);
516 return werr;
517 }
518
519 static int regdb_upgrade_v2_to_v3_fn(struct db_record *rec, void *private_data)
520 {
521 const char *keyname;
522 fstring subkeyname;
523 NTSTATUS status;
524 WERROR werr;
525 uint8_t *buf;
526 uint32_t buflen, len;
527 uint32_t num_items;
528 uint32_t i;
529 TDB_DATA key;
530 TDB_DATA value;
531 struct db_context *db = (struct db_context *)private_data;
532
533 key = dbwrap_record_get_key(rec);
534 if (key.dptr == NULL || key.dsize == 0) {
535 return 0;
536 }
537
538 if (db == NULL) {
539 DEBUG(0, ("regdb_upgrade_v2_to_v3_fn: ERROR: "
540 "NULL db context handed in via private_data\n"));
541 return 1;
542 }
543
544 keyname = (const char *)key.dptr;
545
546 if (strncmp(keyname, REGDB_VERSION_KEYNAME,
547 strlen(REGDB_VERSION_KEYNAME)) == 0)
548 {
549 return 0;
550 }
551
552 if (strncmp(keyname, REG_SORTED_SUBKEYS_PREFIX,
553 strlen(REG_SORTED_SUBKEYS_PREFIX)) == 0)
554 {
555 /* Delete the deprecated sorted subkeys cache. */
556
557 DEBUG(10, ("regdb_upgrade_v2_to_v3: deleting [%s]\n", keyname));
558
559 status = dbwrap_record_delete(rec);
560 if (!NT_STATUS_IS_OK(status)) {
561 DEBUG(0, ("regdb_upgrade_v2_to_v3: tdb_delete for [%s] "
562 "failed!\n", keyname));
563 return 1;
564 }
565
566 return 0;
567 }
568
569 if (strncmp(keyname, REG_VALUE_PREFIX, strlen(REG_VALUE_PREFIX)) == 0) {
570 DEBUG(10, ("regdb_upgrade_v2_to_v3: skipping [%s]\n", keyname));
571 return 0;
572 }
573
574 if (strncmp(keyname, REG_SECDESC_PREFIX,
575 strlen(REG_SECDESC_PREFIX)) == 0)
576 {
577 DEBUG(10, ("regdb_upgrade_v2_to_v3: skipping [%s]\n", keyname));
578 return 0;
579 }
580
581 /*
582 * Found a regular subkey list record.
583 * Walk the list and create the list record for those
584 * subkeys that don't already have one.
585 */
586 DEBUG(10, ("regdb_upgrade_v2_to_v3: scanning subkey list of [%s]\n",
587 keyname));
588
589 value = dbwrap_record_get_value(rec);
590 buf = value.dptr;
591 buflen = value.dsize;
592
593 len = tdb_unpack(buf, buflen, "d", &num_items);
594 if (len == (uint32_t)-1) {
595 /* invalid or empty - skip */
596 return 0;
597 }
598
599 for (i=0; i<num_items; i++) {
600 len += tdb_unpack(buf+len, buflen-len, "f", subkeyname);
601 DEBUG(10, ("regdb_upgrade_v2_to_v3: "
602 "writing subkey list for [%s\\%s]\n",
603 keyname, subkeyname));
604 werr = regdb_store_subkey_list(db, keyname, subkeyname);
605 if (!W_ERROR_IS_OK(werr)) {
606 return 1;
607 }
608 }
609
610 return 0;
611 }
612
613 static WERROR regdb_upgrade_v2_to_v3(struct db_context *db)
614 {
615 NTSTATUS status;
616 WERROR werr;
617
618 status = dbwrap_traverse(db, regdb_upgrade_v2_to_v3_fn, db, NULL);
619 if (!NT_STATUS_IS_OK(status)) {
620 werr = WERR_REG_IO_FAILURE;
621 goto done;
622 }
623
624 werr = regdb_store_regdb_version(db, REGDB_VERSION_V3);
625
626 done:
627 return werr;
628 }
629
630 /***********************************************************************
631 Open the registry database
632 ***********************************************************************/
633
634 WERROR regdb_init(void)
635 {
636 int32_t vers_id;
637 WERROR werr;
638 NTSTATUS status;
639
640 if (regdb) {
641 DEBUG(10, ("regdb_init: incrementing refcount (%d->%d)\n",
642 regdb_refcount, regdb_refcount+1));
643 regdb_refcount++;
644 return WERR_OK;
645 }
646
647 regdb = db_open(NULL, state_path("registry.tdb"), 0,
648 REG_TDB_FLAGS, O_RDWR, 0600);
649 if (!regdb) {
650 regdb = db_open(NULL, state_path("registry.tdb"), 0,
651 REG_TDB_FLAGS, O_RDWR|O_CREAT, 0600);
652 if (!regdb) {
653 werr = ntstatus_to_werror(map_nt_error_from_unix(errno));
654 DEBUG(1,("regdb_init: Failed to open registry %s (%s)\n",
655 state_path("registry.tdb"), strerror(errno) ));
656 return werr;
657 }
658
659 DEBUG(10,("regdb_init: Successfully created registry tdb\n"));
660 }
661
662 regdb_refcount = 1;
663 DEBUG(10, ("regdb_init: registry db openend. refcount reset (%d)\n",
664 regdb_refcount));
665
666 status = dbwrap_fetch_int32(regdb, REGDB_VERSION_KEYNAME, &vers_id);
667 if (!NT_STATUS_IS_OK(status)) {
668 DEBUG(10, ("regdb_init: registry version uninitialized "
669 "(got %d), initializing to version %d\n",
670 vers_id, REGDB_VERSION_V1));
671
672 /*
673 * There was a regdb format version prior to version 1
674 * which did not store a INFO/version key. The format
675 * of this version was identical to version 1 except for
676 * the lack of the sorted subkey cache records.
677 * Since these are disposable, we can safely assume version
678 * 1 if no INFO/version key is found and run the db through
679 * the whole chain of upgrade. If the database was not
680 * initialized, this does not harm. If it was the unversioned
681 * version ("0"), then it do the right thing with the records.
682 */
683 werr = regdb_store_regdb_version(regdb, REGDB_VERSION_V1);
684 if (!W_ERROR_IS_OK(werr)) {
685 return werr;
686 }
687 vers_id = REGDB_VERSION_V1;
688 }
689
690 if (vers_id == REGDB_CODE_VERSION) {
691 return WERR_OK;
692 }
693
694 if (vers_id > REGDB_CODE_VERSION || vers_id == 0) {
695 DEBUG(0, ("regdb_init: unknown registry version %d "
696 "(code version = %d), refusing initialization\n",
697 vers_id, REGDB_CODE_VERSION));
698 return WERR_CAN_NOT_COMPLETE;
699 }
700
701 if (dbwrap_transaction_start(regdb) != 0) {
702 return WERR_REG_IO_FAILURE;
703 }
704
705 if (vers_id == REGDB_VERSION_V1) {
706 DEBUG(10, ("regdb_init: upgrading registry from version %d "
707 "to %d\n", REGDB_VERSION_V1, REGDB_VERSION_V2));
708
709 werr = regdb_upgrade_v1_to_v2(regdb);
710 if (!W_ERROR_IS_OK(werr)) {
711 dbwrap_transaction_cancel(regdb);
712 return werr;
713 }
714
715 vers_id = REGDB_VERSION_V2;
716 }
717
718 if (vers_id == REGDB_VERSION_V2) {
719 DEBUG(10, ("regdb_init: upgrading registry from version %d "
720 "to %d\n", REGDB_VERSION_V2, REGDB_VERSION_V3));
721
722 werr = regdb_upgrade_v2_to_v3(regdb);
723 if (!W_ERROR_IS_OK(werr)) {
724 dbwrap_transaction_cancel(regdb);
725 return werr;
726 }
727
728 vers_id = REGDB_VERSION_V3;
729 }
730
731 /* future upgrade code should go here */
732
733 if (dbwrap_transaction_commit(regdb) != 0) {
734 return WERR_REG_IO_FAILURE;
735 }
736
737 return WERR_OK;
738 }
739
740 /***********************************************************************
741 Open the registry. Must already have been initialized by regdb_init()
742 ***********************************************************************/
743
744 WERROR regdb_open( void )
745 {
746 WERROR result = WERR_OK;
747
748 if ( regdb ) {
749 DEBUG(10, ("regdb_open: incrementing refcount (%d->%d)\n",
750 regdb_refcount, regdb_refcount+1));
751 regdb_refcount++;
752 return WERR_OK;
753 }
754
755 become_root();
756
757 regdb = db_open(NULL, state_path("registry.tdb"), 0,
758 REG_TDB_FLAGS, O_RDWR, 0600);
759 if ( !regdb ) {
760 result = ntstatus_to_werror( map_nt_error_from_unix( errno ) );
761 DEBUG(0,("regdb_open: Failed to open %s! (%s)\n",
762 state_path("registry.tdb"), strerror(errno) ));
763 }
764
765 unbecome_root();
766
767 regdb_refcount = 1;
768 DEBUG(10, ("regdb_open: registry db opened. refcount reset (%d)\n",
769 regdb_refcount));
770
771 return result;
772 }
773
774 /***********************************************************************
775 ***********************************************************************/
776
777 int regdb_close( void )
778 {
779 if (regdb_refcount == 0) {
780 return 0;
781 }
782
783 regdb_refcount--;
784
785 DEBUG(10, ("regdb_close: decrementing refcount (%d->%d)\n",
786 regdb_refcount+1, regdb_refcount));
787
788 if ( regdb_refcount > 0 )
789 return 0;
790
791 SMB_ASSERT( regdb_refcount >= 0 );
792
793 TALLOC_FREE(regdb);
794 return 0;
795 }
796
797 WERROR regdb_transaction_start(void)
798 {
799 return (dbwrap_transaction_start(regdb) == 0) ?
800 WERR_OK : WERR_REG_IO_FAILURE;
801 }
802
803 WERROR regdb_transaction_commit(void)
804 {
805 return (dbwrap_transaction_commit(regdb) == 0) ?
806 WERR_OK : WERR_REG_IO_FAILURE;
807 }
808
809 WERROR regdb_transaction_cancel(void)
810 {
811 return (dbwrap_transaction_cancel(regdb) == 0) ?
812 WERR_OK : WERR_REG_IO_FAILURE;
813 }
814
815 /***********************************************************************
816 return the tdb sequence number of the registry tdb.
817 this is an indicator for the content of the registry
818 having changed. it will change upon regdb_init, too, though.
819 ***********************************************************************/
820 int regdb_get_seqnum(void)
821 {
822 return dbwrap_get_seqnum(regdb);
823 }
824
825
826 static WERROR regdb_delete_key_with_prefix(struct db_context *db,
827 const char *keyname,
828 const char *prefix)
829 {
830 char *path;
831 WERROR werr = WERR_NOMEM;
832 TALLOC_CTX *mem_ctx = talloc_stackframe();
833
834 if (keyname == NULL) {
835 werr = WERR_INVALID_PARAM;
836 goto done;
837 }
838
839 if (prefix == NULL) {
840 path = discard_const_p(char, keyname);
841 } else {
842 path = talloc_asprintf(mem_ctx, "%s\\%s", prefix, keyname);
843 if (path == NULL) {
844 goto done;
845 }
846 }
847
848 path = normalize_reg_path(mem_ctx, path);
849 if (path == NULL) {
850 goto done;
851 }
852
853 werr = ntstatus_to_werror(dbwrap_delete_bystring(db, path));
854
855 /* treat "not found" as ok */
856 if (W_ERROR_EQUAL(werr, WERR_NOT_FOUND)) {
857 werr = WERR_OK;
858 }
859
860 done:
861 talloc_free(mem_ctx);
862 return werr;
863 }
864
865
866 static WERROR regdb_delete_values(struct db_context *db, const char *keyname)
867 {
868 return regdb_delete_key_with_prefix(db, keyname, REG_VALUE_PREFIX);
869 }
870
871 static WERROR regdb_delete_secdesc(struct db_context *db, const char *keyname)
872 {
873 return regdb_delete_key_with_prefix(db, keyname, REG_SECDESC_PREFIX);
874 }
875
876 static WERROR regdb_delete_subkeylist(struct db_context *db, const char *keyname)
877 {
878 return regdb_delete_key_with_prefix(db, keyname, NULL);
879 }
880
881
882 static WERROR regdb_delete_key_lists(struct db_context *db, const char *keyname)
883 {
884 WERROR werr;
885
886 werr = regdb_delete_values(db, keyname);
887 if (!W_ERROR_IS_OK(werr)) {
888 DEBUG(1, (__location__ " Deleting %s\\%s failed: %s\n",
889 REG_VALUE_PREFIX, keyname, win_errstr(werr)));
890 goto done;
891 }
892
893 werr = regdb_delete_secdesc(db, keyname);
894 if (!W_ERROR_IS_OK(werr)) {
895 DEBUG(1, (__location__ " Deleting %s\\%s failed: %s\n",
896 REG_SECDESC_PREFIX, keyname, win_errstr(werr)));
897 goto done;
898 }
899
900 werr = regdb_delete_subkeylist(db, keyname);
901 if (!W_ERROR_IS_OK(werr)) {
902 DEBUG(1, (__location__ " Deleting %s failed: %s\n",
903 keyname, win_errstr(werr)));
904 goto done;
905 }
906
907 done:
908 return werr;
909 }
910
911 /***********************************************************************
912 Add subkey strings to the registry tdb under a defined key
913 fmt is the same format as tdb_pack except this function only supports
914 fstrings
915 ***********************************************************************/
916
917 static WERROR regdb_store_keys_internal2(struct db_context *db,
918 const char *key,
919 struct regsubkey_ctr *ctr)
920 {
921 TDB_DATA dbuf;
922 uint8 *buffer = NULL;
923 int i = 0;
924 uint32 len, buflen;
925 uint32 num_subkeys = regsubkey_ctr_numkeys(ctr);
926 char *keyname = NULL;
927 TALLOC_CTX *ctx = talloc_stackframe();
928 WERROR werr;
929
930 if (!key) {
931 werr = WERR_INVALID_PARAM;
932 goto done;
933 }
934
935 keyname = talloc_strdup(ctx, key);
936 if (!keyname) {
937 werr = WERR_NOMEM;
938 goto done;
939 }
940
941 keyname = normalize_reg_path(ctx, keyname);
942 if (!keyname) {
943 werr = WERR_NOMEM;
944 goto done;
945 }
946
947 /* allocate some initial memory */
948
949 buffer = (uint8 *)SMB_MALLOC(1024);
950 if (buffer == NULL) {
951 werr = WERR_NOMEM;
952 goto done;
953 }
954 buflen = 1024;
955 len = 0;
956
957 /* store the number of subkeys */
958
959 len += tdb_pack(buffer+len, buflen-len, "d", num_subkeys);
960
961 /* pack all the strings */
962
963 for (i=0; i<num_subkeys; i++) {
964 size_t thistime;
965
966 thistime = tdb_pack(buffer+len, buflen-len, "f",
967 regsubkey_ctr_specific_key(ctr, i));
968 if (len+thistime > buflen) {
969 size_t thistime2;
970 /*
971 * tdb_pack hasn't done anything because of the short
972 * buffer, allocate extra space.
973 */
974 buffer = SMB_REALLOC_ARRAY(buffer, uint8_t,
975 (len+thistime)*2);
976 if(buffer == NULL) {
977 DEBUG(0, ("regdb_store_keys: Failed to realloc "
978 "memory of size [%u]\n",
979 (unsigned int)(len+thistime)*2));
980 werr = WERR_NOMEM;
981 goto done;
982 }
983 buflen = (len+thistime)*2;
984 thistime2 = tdb_pack(
985 buffer+len, buflen-len, "f",
986 regsubkey_ctr_specific_key(ctr, i));
987 if (thistime2 != thistime) {
988 DEBUG(0, ("tdb_pack failed\n"));
989 werr = WERR_CAN_NOT_COMPLETE;
990 goto done;
991 }
992 }
993 len += thistime;
994 }
995
996 /* finally write out the data */
997
998 dbuf.dptr = buffer;
999 dbuf.dsize = len;
1000 werr = ntstatus_to_werror(dbwrap_store_bystring(db, keyname, dbuf,
1001 TDB_REPLACE));
1002
1003 done:
1004 TALLOC_FREE(ctx);
1005 SAFE_FREE(buffer);
1006 return werr;
1007 }
1008
1009 /**
1010 * Utility function to store a new empty list of
1011 * subkeys of given key specified as parent and subkey name
1012 * (thereby creating the key).
1013 * If the parent keyname is NULL, then the "subkey" is
1014 * interpreted as a base key.
1015 * If the subkey list does already exist, it is not modified.
1016 *
1017 * Must be called from within a transaction.
1018 */
1019 static WERROR regdb_store_subkey_list(struct db_context *db, const char *parent,
1020 const char *key)
1021 {
1022 WERROR werr;
1023 char *path = NULL;
1024 struct regsubkey_ctr *subkeys = NULL;
1025 TALLOC_CTX *frame = talloc_stackframe();
1026
1027 if (parent == NULL) {
1028 path = talloc_strdup(frame, key);
1029 } else {
1030 path = talloc_asprintf(frame, "%s\\%s", parent, key);
1031 }
1032 if (!path) {
1033 werr = WERR_NOMEM;
1034 goto done;
1035 }
1036
1037 werr = regsubkey_ctr_init(frame, &subkeys);
1038 W_ERROR_NOT_OK_GOTO_DONE(werr);
1039
1040 werr = regdb_fetch_keys_internal(db, path, subkeys);
1041 if (W_ERROR_IS_OK(werr)) {
1042 /* subkey list exists already - don't modify */
1043 goto done;
1044 }
1045
1046 werr = regsubkey_ctr_reinit(subkeys);
1047 W_ERROR_NOT_OK_GOTO_DONE(werr);
1048
1049 /* create a record with 0 subkeys */
1050 werr = regdb_store_keys_internal2(db, path, subkeys);
1051 if (!W_ERROR_IS_OK(werr)) {
1052 DEBUG(0, ("regdb_store_keys: Failed to store new record for "
1053 "key [%s]: %s\n", path, win_errstr(werr)));
1054 goto done;
1055 }
1056
1057 done:
1058 talloc_free(frame);
1059 return werr;
1060 }
1061
1062 /***********************************************************************
1063 Store the new subkey record and create any child key records that
1064 do not currently exist
1065 ***********************************************************************/
1066
1067 struct regdb_store_keys_context {
1068 const char *key;
1069 struct regsubkey_ctr *ctr;
1070 };
1071
1072 static NTSTATUS regdb_store_keys_action(struct db_context *db,
1073 void *private_data)
1074 {
1075 struct regdb_store_keys_context *store_ctx;
1076 WERROR werr;
1077 int num_subkeys, i;
1078 char *path = NULL;
1079 struct regsubkey_ctr *old_subkeys = NULL;
1080 char *oldkeyname = NULL;
1081 TALLOC_CTX *mem_ctx = talloc_stackframe();
1082
1083 store_ctx = (struct regdb_store_keys_context *)private_data;
1084
1085 /*
1086 * Re-fetch the old keys inside the transaction
1087 */
1088
1089 werr = regsubkey_ctr_init(mem_ctx, &old_subkeys);
1090 W_ERROR_NOT_OK_GOTO_DONE(werr);
1091
1092 werr = regdb_fetch_keys_internal(db, store_ctx->key, old_subkeys);
1093 if (!W_ERROR_IS_OK(werr) &&
1094 !W_ERROR_EQUAL(werr, WERR_NOT_FOUND))
1095 {
1096 goto done;
1097 }
1098
1099 /*
1100 * Make the store operation as safe as possible without transactions:
1101 *
1102 * (1) For each subkey removed from ctr compared with old_subkeys:
1103 *
1104 * (a) First delete the value db entry.
1105 *
1106 * (b) Next delete the secdesc db record.
1107 *
1108 * (c) Then delete the subkey list entry.
1109 *
1110 * (2) Now write the list of subkeys of the parent key,
1111 * deleting removed entries and adding new ones.
1112 *
1113 * (3) Finally create the subkey list entries for the added keys.
1114 *
1115 * This way if we crash half-way in between deleting the subkeys
1116 * and storing the parent's list of subkeys, no old data can pop up
1117 * out of the blue when re-adding keys later on.
1118 */
1119
1120 /* (1) delete removed keys' lists (values/secdesc/subkeys) */
1121
1122 num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
1123 for (i=0; i<num_subkeys; i++) {
1124 oldkeyname = regsubkey_ctr_specific_key(old_subkeys, i);
1125
1126 if (regsubkey_ctr_key_exists(store_ctx->ctr, oldkeyname)) {
1127 /*
1128 * It's still around, don't delete
1129 */
1130 continue;
1131 }
1132
1133 path = talloc_asprintf(mem_ctx, "%s\\%s", store_ctx->key,
1134 oldkeyname);
1135 if (!path) {
1136 werr = WERR_NOMEM;
1137 goto done;
1138 }
1139
1140 werr = regdb_delete_key_lists(db, path);
1141 W_ERROR_NOT_OK_GOTO_DONE(werr);
1142
1143 TALLOC_FREE(path);
1144 }
1145
1146 TALLOC_FREE(old_subkeys);
1147
1148 /* (2) store the subkey list for the parent */
1149
1150 werr = regdb_store_keys_internal2(db, store_ctx->key, store_ctx->ctr);
1151 if (!W_ERROR_IS_OK(werr)) {
1152 DEBUG(0,("regdb_store_keys: Failed to store new subkey list "
1153 "for parent [%s]: %s\n", store_ctx->key,
1154 win_errstr(werr)));
1155 goto done;
1156 }
1157
1158 /* (3) now create records for any subkeys that don't already exist */
1159
1160 num_subkeys = regsubkey_ctr_numkeys(store_ctx->ctr);
1161
1162 for (i=0; i<num_subkeys; i++) {
1163 const char *subkey;
1164
1165 subkey = regsubkey_ctr_specific_key(store_ctx->ctr, i);
1166
1167 werr = regdb_store_subkey_list(db, store_ctx->key, subkey);
1168 W_ERROR_NOT_OK_GOTO_DONE(werr);
1169 }
1170
1171 werr = WERR_OK;
1172
1173 done:
1174 talloc_free(mem_ctx);
1175 return werror_to_ntstatus(werr);
1176 }
1177
1178 static bool regdb_store_keys_internal(struct db_context *db, const char *key,
1179 struct regsubkey_ctr *ctr)
1180 {
1181 int num_subkeys, old_num_subkeys, i;
1182 struct regsubkey_ctr *old_subkeys = NULL;
1183 TALLOC_CTX *ctx = talloc_stackframe();
1184 WERROR werr;
1185 bool ret = false;
1186 struct regdb_store_keys_context store_ctx;
1187
1188 if (!regdb_key_exists(db, key)) {
1189 goto done;
1190 }
1191
1192 /*
1193 * fetch a list of the old subkeys so we can determine if anything has
1194 * changed
1195 */
1196
1197 werr = regsubkey_ctr_init(ctx, &old_subkeys);
1198 if (!W_ERROR_IS_OK(werr)) {
1199 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
1200 goto done;
1201 }
1202
1203 werr = regdb_fetch_keys_internal(db, key, old_subkeys);
1204 if (!W_ERROR_IS_OK(werr) &&
1205 !W_ERROR_EQUAL(werr, WERR_NOT_FOUND))
1206 {
1207 goto done;
1208 }
1209
1210 num_subkeys = regsubkey_ctr_numkeys(ctr);
1211 old_num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
1212 if ((num_subkeys && old_num_subkeys) &&
1213 (num_subkeys == old_num_subkeys)) {
1214
1215 for (i = 0; i < num_subkeys; i++) {
1216 if (strcmp(regsubkey_ctr_specific_key(ctr, i),
1217 regsubkey_ctr_specific_key(old_subkeys, i))
1218 != 0)
1219 {
1220 break;
1221 }
1222 }
1223 if (i == num_subkeys) {
1224 /*
1225 * Nothing changed, no point to even start a tdb
1226 * transaction
1227 */
1228
1229 ret = true;
1230 goto done;
1231 }
1232 }
1233
1234 TALLOC_FREE(old_subkeys);
1235
1236 store_ctx.key = key;
1237 store_ctx.ctr = ctr;
1238
1239 werr = regdb_trans_do(db,
1240 regdb_store_keys_action,
1241 &store_ctx);
1242
1243 ret = W_ERROR_IS_OK(werr);
1244
1245 done:
1246 TALLOC_FREE(ctx);
1247
1248 return ret;
1249 }
1250
1251 bool regdb_store_keys(const char *key, struct regsubkey_ctr *ctr)
1252 {
1253 return regdb_store_keys_internal(regdb, key, ctr);
1254 }
1255
1256 /**
1257 * create a subkey of a given key
1258 */
1259
1260 struct regdb_create_subkey_context {
1261 const char *key;
1262 const char *subkey;
1263 };
1264
1265 static NTSTATUS regdb_create_subkey_action(struct db_context *db,
1266 void *private_data)
1267 {
1268 WERROR werr;
1269 struct regdb_create_subkey_context *create_ctx;
1270 struct regsubkey_ctr *subkeys;
1271 TALLOC_CTX *mem_ctx = talloc_stackframe();
1272
1273 create_ctx = (struct regdb_create_subkey_context *)private_data;
1274
1275 werr = regsubkey_ctr_init(mem_ctx, &subkeys);
1276 W_ERROR_NOT_OK_GOTO_DONE(werr);
1277
1278 werr = regdb_fetch_keys_internal(db, create_ctx->key, subkeys);
1279 W_ERROR_NOT_OK_GOTO_DONE(werr);
1280
1281 werr = regsubkey_ctr_addkey(subkeys, create_ctx->subkey);
1282 W_ERROR_NOT_OK_GOTO_DONE(werr);
1283
1284 werr = regdb_store_keys_internal2(db, create_ctx->key, subkeys);
1285 if (!W_ERROR_IS_OK(werr)) {
1286 DEBUG(0, (__location__ " failed to store new subkey list for "
1287 "parent key %s: %s\n", create_ctx->key,
1288 win_errstr(werr)));
1289 }
1290
1291 werr = regdb_store_subkey_list(db, create_ctx->key, create_ctx->subkey);
1292
1293 done:
1294 talloc_free(mem_ctx);
1295 return werror_to_ntstatus(werr);
1296 }
1297
1298 static WERROR regdb_create_subkey_internal(struct db_context *db,
1299 const char *key,
1300 const char *subkey)
1301 {
1302 WERROR werr;
1303 struct regsubkey_ctr *subkeys;
1304 TALLOC_CTX *mem_ctx = talloc_stackframe();
1305 struct regdb_create_subkey_context create_ctx;
1306
1307 if (!regdb_key_exists(db, key)) {
1308 werr = WERR_NOT_FOUND;
1309 goto done;
1310 }
1311
1312 werr = regsubkey_ctr_init(mem_ctx, &subkeys);
1313 W_ERROR_NOT_OK_GOTO_DONE(werr);
1314
1315 werr = regdb_fetch_keys_internal(db, key, subkeys);
1316 W_ERROR_NOT_OK_GOTO_DONE(werr);
1317
1318 if (regsubkey_ctr_key_exists(subkeys, subkey)) {
1319 char *newkey;
1320
1321 newkey = talloc_asprintf(mem_ctx, "%s\\%s", key, subkey);
1322 if (newkey == NULL) {
1323 werr = WERR_NOMEM;
1324 goto done;
1325 }
1326
1327 if (regdb_key_exists(db, newkey)) {
1328 werr = WERR_OK;
1329 goto done;
1330 }
1331 }
1332
1333 talloc_free(subkeys);
1334
1335 create_ctx.key = key;
1336 create_ctx.subkey = subkey;
1337
1338 werr = regdb_trans_do(db,
1339 regdb_create_subkey_action,
1340 &create_ctx);
1341
1342 done:
1343 talloc_free(mem_ctx);
1344 return werr;
1345 }
1346
1347 static WERROR regdb_create_subkey(const char *key, const char *subkey)
1348 {
1349 return regdb_create_subkey_internal(regdb, key, subkey);
1350 }
1351
1352 /**
1353 * create a base key
1354 */
1355
1356 struct regdb_create_basekey_context {
1357 const char *key;
1358 };
1359
1360 static NTSTATUS regdb_create_basekey_action(struct db_context *db,
1361 void *private_data)
1362 {
1363 WERROR werr;
1364 struct regdb_create_basekey_context *create_ctx;
1365
1366 create_ctx = (struct regdb_create_basekey_context *)private_data;
1367
1368 werr = regdb_store_subkey_list(db, NULL, create_ctx->key);
1369
1370 return werror_to_ntstatus(werr);
1371 }
1372
1373 static WERROR regdb_create_basekey(struct db_context *db, const char *key)
1374 {
1375 WERROR werr;
1376 struct regdb_create_subkey_context create_ctx;
1377
1378 create_ctx.key = key;
1379
1380 werr = regdb_trans_do(db,
1381 regdb_create_basekey_action,
1382 &create_ctx);
1383
1384 return werr;
1385 }
1386
1387 /**
1388 * create a subkey of a given key
1389 */
1390
1391 struct regdb_delete_subkey_context {
1392 const char *key;
1393 const char *subkey;
1394 const char *path;
1395 bool lazy;
1396 };
1397
1398 static NTSTATUS regdb_delete_subkey_action(struct db_context *db,
1399 void *private_data)
1400 {
1401 WERROR werr;
1402 struct regdb_delete_subkey_context *delete_ctx;
1403 struct regsubkey_ctr *subkeys;
1404 TALLOC_CTX *mem_ctx = talloc_stackframe();
1405
1406 delete_ctx = (struct regdb_delete_subkey_context *)private_data;
1407
1408 werr = regdb_delete_key_lists(db, delete_ctx->path);
1409 W_ERROR_NOT_OK_GOTO_DONE(werr);
1410
1411 if (delete_ctx->lazy) {
1412 goto done;
1413 }
1414
1415 werr = regsubkey_ctr_init(mem_ctx, &subkeys);
1416 W_ERROR_NOT_OK_GOTO_DONE(werr);
1417
1418 werr = regdb_fetch_keys_internal(db, delete_ctx->key, subkeys);
1419 W_ERROR_NOT_OK_GOTO_DONE(werr);
1420
1421 werr = regsubkey_ctr_delkey(subkeys, delete_ctx->subkey);
1422 W_ERROR_NOT_OK_GOTO_DONE(werr);
1423
1424 werr = regdb_store_keys_internal2(db, delete_ctx->key, subkeys);
1425 if (!W_ERROR_IS_OK(werr)) {
1426 DEBUG(0, (__location__ " failed to store new subkey_list for "
1427 "parent key %s: %s\n", delete_ctx->key,
1428 win_errstr(werr)));
1429 }
1430
1431 done:
1432 talloc_free(mem_ctx);
1433 return werror_to_ntstatus(werr);
1434 }
1435
1436 static WERROR regdb_delete_subkey(const char *key, const char *subkey, bool lazy)
1437 {
1438 WERROR werr;
1439 char *path;
1440 struct regdb_delete_subkey_context delete_ctx;
1441 TALLOC_CTX *mem_ctx = talloc_stackframe();
1442
1443 if (!regdb_key_exists(regdb, key)) {
1444 werr = WERR_NOT_FOUND;
1445 goto done;
1446 }
1447
1448 path = talloc_asprintf(mem_ctx, "%s\\%s", key, subkey);
1449 if (path == NULL) {
1450 werr = WERR_NOMEM;
1451 goto done;
1452 }
1453
1454 if (!regdb_key_exists(regdb, path)) {
1455 werr = WERR_OK;
1456 goto done;
1457 }
1458
1459 delete_ctx.key = key;
1460 delete_ctx.subkey = subkey;
1461 delete_ctx.path = path;
1462 delete_ctx.lazy = lazy;
1463
1464 werr = regdb_trans_do(regdb,
1465 regdb_delete_subkey_action,
1466 &delete_ctx);
1467
1468 done:
1469 talloc_free(mem_ctx);
1470 return werr;
1471 }
1472
1473 static TDB_DATA regdb_fetch_key_internal(struct db_context *db,
1474 TALLOC_CTX *mem_ctx, const char *key)
1475 {
1476 char *path = NULL;
1477 TDB_DATA data;
1478 NTSTATUS status;
1479
1480 path = normalize_reg_path(mem_ctx, key);
1481 if (!path) {
1482 return make_tdb_data(NULL, 0);
1483 }
1484
1485 status = dbwrap_fetch_bystring(db, mem_ctx, path, &data);
1486 if (!NT_STATUS_IS_OK(status)) {
1487 data = tdb_null;
1488 }
1489
1490 TALLOC_FREE(path);
1491 return data;
1492 }
1493
1494
1495 /**
1496 * Check for the existence of a key.
1497 *
1498 * Existence of a key is authoritatively defined by
1499 * the existence of the record that contains the list
1500 * of its subkeys.
1501 *
1502 * Return false, if the record does not match the correct
1503 * structure of an initial 4-byte counter and then a
1504 * list of the corresponding number of zero-terminated
1505 * strings.
1506 */
1507 static bool regdb_key_exists(struct db_context *db, const char *key)
1508 {
1509 TALLOC_CTX *mem_ctx = talloc_stackframe();
1510 TDB_DATA value;
1511 bool ret = false;
1512 char *path;
1513 uint32_t buflen;
1514 const char *buf;
1515 uint32_t num_items, i;
1516 int32_t len;
1517
1518 if (key == NULL) {
1519 goto done;
1520 }
1521
1522 path = normalize_reg_path(mem_ctx, key);
1523 if (path == NULL) {
1524 DEBUG(0, ("out of memory! (talloc failed)\n"));
1525 goto done;
1526 }
1527
1528 if (*path == '\0') {
1529 goto done;
1530 }
1531
1532 value = regdb_fetch_key_internal(db, mem_ctx, path);
1533 if (value.dptr == NULL) {
1534 goto done;
1535 }
1536
1537 if (value.dsize == 0) {
1538 DEBUG(10, ("regdb_key_exists: subkeylist-record for key "
1539 "[%s] is empty: Could be a deleted record in a "
1540 "clustered (ctdb) environment?\n",
1541 path));
1542 goto done;
1543 }
1544
1545 len = tdb_unpack(value.dptr, value.dsize, "d", &num_items);
1546 if (len == (int32_t)-1) {
1547 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record for key "
1548 "[%s] is invalid: Could not parse initial 4-byte "
1549 "counter. record data length is %u.\n",
1550 path, (unsigned int)value.dsize));
1551 goto done;
1552 }
1553
1554 /*
1555 * Note: the tdb_unpack check above implies that len <= value.dsize
1556 */
1557 buflen = value.dsize - len;
1558 buf = (const char *)value.dptr + len;
1559
1560 len = 0;
1561
1562 for (i = 0; i < num_items; i++) {
1563 if (buflen == 0) {
1564 break;
1565 }
1566 len = strnlen(buf, buflen) + 1;
1567 if (buflen < len) {
1568 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record "
1569 "for key [%s] is corrupt: %u items expected, "
1570 "item number %u is not zero terminated.\n",
1571 path, num_items, i+1));
1572 goto done;
1573 }
1574
1575 buf += len;
1576 buflen -= len;
1577 }
1578
1579 if (buflen > 0) {
1580 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record for key "
1581 "[%s] is corrupt: %u items expected and found, but "
1582 "the record contains additional %u bytes\n",
1583 path, num_items, buflen));
1584 goto done;
1585 }
1586
1587 if (i < num_items) {
1588 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record for key "
1589 "[%s] is corrupt: %u items expected, but only %u "
1590 "items found.\n",
1591 path, num_items, i+1));
1592 goto done;
1593 }
1594
1595 ret = true;
1596
1597 done:
1598 TALLOC_FREE(mem_ctx);
1599 return ret;
1600 }
1601
1602
1603 /***********************************************************************
1604 Retrieve an array of strings containing subkeys. Memory should be
1605 released by the caller.
1606 ***********************************************************************/
1607
1608 static WERROR regdb_fetch_keys_internal(struct db_context *db, const char *key,
1609 struct regsubkey_ctr *ctr)
1610 {
1611 WERROR werr;
1612 uint32_t num_items;
1613 uint8 *buf;
1614 uint32 buflen, len;
1615 int i;
1616 fstring subkeyname;
1617 TALLOC_CTX *frame = talloc_stackframe();
1618 TDB_DATA value;
1619
1620 DEBUG(11,("regdb_fetch_keys: Enter key => [%s]\n", key ? key : "NULL"));
1621
1622 if (!regdb_key_exists(db, key)) {
1623 DEBUG(10, ("key [%s] not found\n", key));
1624 werr = WERR_NOT_FOUND;
1625 goto done;
1626 }
1627
1628 werr = regsubkey_ctr_reinit(ctr);
1629 W_ERROR_NOT_OK_GOTO_DONE(werr);
1630
1631 werr = regsubkey_ctr_set_seqnum(ctr, dbwrap_get_seqnum(db));
1632 W_ERROR_NOT_OK_GOTO_DONE(werr);
1633
1634 value = regdb_fetch_key_internal(db, frame, key);
1635
1636 if (value.dsize == 0 || value.dptr == NULL) {
1637 DEBUG(10, ("regdb_fetch_keys: no subkeys found for key [%s]\n",
1638 key));
1639 goto done;
1640 }
1641
1642 buf = value.dptr;
1643 buflen = value.dsize;
1644 len = tdb_unpack( buf, buflen, "d", &num_items);
1645 if (len == (uint32_t)-1) {
1646 werr = WERR_NOT_FOUND;
1647 goto done;
1648 }
1649
1650 for (i=0; i<num_items; i++) {
1651 len += tdb_unpack(buf+len, buflen-len, "f", subkeyname);
1652 werr = regsubkey_ctr_addkey(ctr, subkeyname);
1653 if (!W_ERROR_IS_OK(werr)) {
1654 DEBUG(5, ("regdb_fetch_keys: regsubkey_ctr_addkey "
1655 "failed: %s\n", win_errstr(werr)));
1656 num_items = 0;
1657 goto done;
1658 }
1659 }
1660
1661 DEBUG(11,("regdb_fetch_keys: Exit [%d] items\n", num_items));
1662
1663 done:
1664 TALLOC_FREE(frame);
1665 return werr;
1666 }
1667
1668 int regdb_fetch_keys(const char *key, struct regsubkey_ctr *ctr)
1669 {
1670 WERROR werr;
1671
1672 werr = regdb_fetch_keys_internal(regdb, key, ctr);
1673 if (!W_ERROR_IS_OK(werr)) {
1674 return -1;
1675 }
1676
1677 return regsubkey_ctr_numkeys(ctr);
1678 }
1679
1680 /****************************************************************************
1681 Unpack a list of registry values frem the TDB
1682 ***************************************************************************/
1683
1684 static int regdb_unpack_values(struct regval_ctr *values, uint8 *buf, int buflen)
1685 {
1686 int len = 0;
1687 uint32 type;
1688 fstring valuename;
1689 uint32 size;
1690 uint8 *data_p;
1691 uint32 num_values = 0;
1692 int i;
1693
1694 /* loop and unpack the rest of the registry values */
1695
1696 len += tdb_unpack(buf+len, buflen-len, "d", &num_values);
1697
1698 for ( i=0; i<num_values; i++ ) {
1699 /* unpack the next regval */
1700
1701 type = REG_NONE;
1702 size = 0;
1703 data_p = NULL;
1704 valuename[0] = '\0';
1705 len += tdb_unpack(buf+len, buflen-len, "fdB",
1706 valuename,
1707 &type,
1708 &size,
1709 &data_p);
1710
1711 regval_ctr_addvalue(values, valuename, type,
1712 (uint8_t *)data_p, size);
1713 SAFE_FREE(data_p); /* 'B' option to tdb_unpack does a malloc() */
1714
1715 DEBUG(8,("specific: [%s], len: %d\n", valuename, size));
1716 }
1717
1718 return len;
1719 }
1720
1721 /****************************************************************************
1722 Pack all values in all printer keys
1723 ***************************************************************************/
1724
1725 static int regdb_pack_values(struct regval_ctr *values, uint8 *buf, int buflen)
1726 {
1727 int len = 0;
1728 int i;
1729 struct regval_blob *val;
1730 int num_values;
1731
1732 if ( !values )
1733 return 0;
1734
1735 num_values = regval_ctr_numvals( values );
1736
1737 /* pack the number of values first */
1738
1739 len += tdb_pack( buf+len, buflen-len, "d", num_values );
1740
1741 /* loop over all values */
1742
1743 for ( i=0; i<num_values; i++ ) {
1744 val = regval_ctr_specific_value( values, i );
1745 len += tdb_pack(buf+len, buflen-len, "fdB",
1746 regval_name(val),
1747 regval_type(val),
1748 regval_size(val),
1749 regval_data_p(val) );
1750 }
1751
1752 return len;
1753 }
1754
1755 /***********************************************************************
1756 Retrieve an array of strings containing subkeys. Memory should be
1757 released by the caller.
1758 ***********************************************************************/
1759
1760 static int regdb_fetch_values_internal(struct db_context *db, const char* key,
1761 struct regval_ctr *values)
1762 {
1763 char *keystr = NULL;
1764 TALLOC_CTX *ctx = talloc_stackframe();
1765 int ret = 0;
1766 TDB_DATA value;
1767 WERROR werr;
1768
1769 DEBUG(10,("regdb_fetch_values: Looking for value of key [%s] \n", key));
1770
1771 if (!regdb_key_exists(db, key)) {
1772 goto done;
1773 }
1774
1775 keystr = talloc_asprintf(ctx, "%s\\%s", REG_VALUE_PREFIX, key);
1776 if (!keystr) {
1777 goto done;
1778 }
1779
1780 werr = regval_ctr_set_seqnum(values, dbwrap_get_seqnum(db));
1781 W_ERROR_NOT_OK_GOTO_DONE(werr);
1782
1783 value = regdb_fetch_key_internal(db, ctx, keystr);
1784
1785 if (!value.dptr) {
1786 /* all keys have zero values by default */
1787 goto done;
1788 }
1789
1790 regdb_unpack_values(values, value.dptr, value.dsize);
1791 ret = regval_ctr_numvals(values);
1792
1793 done:
1794 TALLOC_FREE(ctx);
1795 return ret;
1796 }
1797
1798 int regdb_fetch_values(const char* key, struct regval_ctr *values)
1799 {
1800 return regdb_fetch_values_internal(regdb, key, values);
1801 }
1802
1803 static NTSTATUS regdb_store_values_internal(struct db_context *db,
1804 const char *key,
1805 struct regval_ctr *values)
1806 {
1807 TDB_DATA old_data, data;
1808 char *keystr = NULL;
1809 TALLOC_CTX *ctx = talloc_stackframe();
1810 int len;
1811 NTSTATUS status;
1812
1813 DEBUG(10,("regdb_store_values: Looking for value of key [%s] \n", key));
1814
1815 if (!regdb_key_exists(db, key)) {
1816 status = NT_STATUS_NOT_FOUND;
1817 goto done;
1818 }
1819
1820 ZERO_STRUCT(data);
1821
1822 len = regdb_pack_values(values, data.dptr, data.dsize);
1823 if (len <= 0) {
1824 DEBUG(0,("regdb_store_values: unable to pack values. len <= 0\n"));
1825 status = NT_STATUS_UNSUCCESSFUL;
1826 goto done;
1827 }
1828
1829 data.dptr = talloc_array(ctx, uint8, len);
1830 data.dsize = len;
1831
1832 len = regdb_pack_values(values, data.dptr, data.dsize);
1833
1834 SMB_ASSERT( len == data.dsize );
1835
1836 keystr = talloc_asprintf(ctx, "%s\\%s", REG_VALUE_PREFIX, key );
1837 if (!keystr) {
1838 status = NT_STATUS_NO_MEMORY;
1839 goto done;
1840 }
1841 keystr = normalize_reg_path(ctx, keystr);
1842 if (!keystr) {
1843 status = NT_STATUS_NO_MEMORY;
1844 goto done;
1845 }
1846
1847 status = dbwrap_fetch_bystring(db, ctx, keystr, &old_data);
1848
1849 if (NT_STATUS_IS_OK(status)
1850 && (old_data.dptr != NULL)
1851 && (old_data.dsize == data.dsize)
1852 && (memcmp(old_data.dptr, data.dptr, data.dsize) == 0))
1853 {
1854 status = NT_STATUS_OK;
1855 goto done;
1856 }
1857
1858 status = dbwrap_trans_store_bystring(db, keystr, data, TDB_REPLACE);
1859
1860 done:
1861 TALLOC_FREE(ctx);
1862 return status;
1863 }
1864
1865 struct regdb_store_values_ctx {
1866 const char *key;
1867 struct regval_ctr *values;
1868 };
1869
1870 static NTSTATUS regdb_store_values_action(struct db_context *db,
1871 void *private_data)
1872 {
1873 NTSTATUS status;
1874 struct regdb_store_values_ctx *ctx =
1875 (struct regdb_store_values_ctx *)private_data;
1876
1877 status = regdb_store_values_internal(db, ctx->key, ctx->values);
1878
1879 return status;
1880 }
1881
1882 bool regdb_store_values(const char *key, struct regval_ctr *values)
1883 {
1884 WERROR werr;
1885 struct regdb_store_values_ctx ctx;
1886
1887 ctx.key = key;
1888 ctx.values = values;
1889
1890 werr = regdb_trans_do(regdb, regdb_store_values_action, &ctx);
1891
1892 return W_ERROR_IS_OK(werr);
1893 }
1894
1895 static WERROR regdb_get_secdesc(TALLOC_CTX *mem_ctx, const char *key,
1896 struct security_descriptor **psecdesc)
1897 {
1898 char *tdbkey;
1899 TDB_DATA data;
1900 NTSTATUS status;
1901 TALLOC_CTX *tmp_ctx = talloc_stackframe();
1902 WERROR err = WERR_OK;
1903
1904 DEBUG(10, ("regdb_get_secdesc: Getting secdesc of key [%s]\n", key));
1905
1906 if (!regdb_key_exists(regdb, key)) {
1907 err = WERR_BADFILE;
1908 goto done;
1909 }
1910
1911 tdbkey = talloc_asprintf(tmp_ctx, "%s\\%s", REG_SECDESC_PREFIX, key);
1912 if (tdbkey == NULL) {
1913 err = WERR_NOMEM;
1914 goto done;
1915 }
1916
1917 tdbkey = normalize_reg_path(tmp_ctx, tdbkey);
1918 if (tdbkey == NULL) {
1919 err = WERR_NOMEM;
1920 goto done;
1921 }
1922
1923 status = dbwrap_fetch_bystring(regdb, tmp_ctx, tdbkey, &data);
1924 if (!NT_STATUS_IS_OK(status)) {
1925 err = WERR_BADFILE;
1926 goto done;
1927 }
1928
1929 status = unmarshall_sec_desc(mem_ctx, (uint8 *)data.dptr, data.dsize,
1930 psecdesc);
1931
1932 if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
1933 err = WERR_NOMEM;
1934 } else if (!NT_STATUS_IS_OK(status)) {
1935 err = WERR_REG_CORRUPT;
1936 }
1937
1938 done:
1939 TALLOC_FREE(tmp_ctx);
1940 return err;
1941 }
1942
1943 struct regdb_set_secdesc_ctx {
1944 const char *key;
1945 struct security_descriptor *secdesc;
1946 };
1947
1948 static NTSTATUS regdb_set_secdesc_action(struct db_context *db,
1949 void *private_data)
1950 {
1951 char *tdbkey;
1952 NTSTATUS status;
1953 TDB_DATA tdbdata;
1954 struct regdb_set_secdesc_ctx *ctx =
1955 (struct regdb_set_secdesc_ctx *)private_data;
1956 TALLOC_CTX *frame = talloc_stackframe();
1957
1958 tdbkey = talloc_asprintf(frame, "%s\\%s", REG_SECDESC_PREFIX, ctx->key);
1959 if (tdbkey == NULL) {
1960 status = NT_STATUS_NO_MEMORY;
1961 goto done;
1962 }
1963
1964 tdbkey = normalize_reg_path(frame, tdbkey);
1965 if (tdbkey == NULL) {
1966 status = NT_STATUS_NO_MEMORY;
1967 goto done;
1968 }
1969
1970 if (ctx->secdesc == NULL) {
1971 /* assuming a delete */
1972 status = dbwrap_delete_bystring(db, tdbkey);
1973 goto done;
1974 }
1975
1976 status = marshall_sec_desc(frame, ctx->secdesc, &tdbdata.dptr,
1977 &tdbdata.dsize);
1978 if (!NT_STATUS_IS_OK(status)) {
1979 goto done;
1980 }
1981
1982 status = dbwrap_store_bystring(db, tdbkey, tdbdata, 0);
1983
1984 done:
1985 TALLOC_FREE(frame);
1986 return status;
1987 }
1988
1989 static WERROR regdb_set_secdesc(const char *key,
1990 struct security_descriptor *secdesc)
1991 {
1992 WERROR err;
1993 struct regdb_set_secdesc_ctx ctx;
1994
1995 if (!regdb_key_exists(regdb, key)) {
1996 err = WERR_BADFILE;
1997 goto done;
1998 }
1999
2000 ctx.key = key;
2001 ctx.secdesc = secdesc;
2002
2003 err = regdb_trans_do(regdb, regdb_set_secdesc_action, &ctx);
2004
2005 done:
2006 return err;
2007 }
2008
2009 bool regdb_subkeys_need_update(struct regsubkey_ctr *subkeys)
2010 {
2011 return (regdb_get_seqnum() != regsubkey_ctr_get_seqnum(subkeys));
2012 }
2013
2014 bool regdb_values_need_update(struct regval_ctr *values)
2015 {
2016 return (regdb_get_seqnum() != regval_ctr_get_seqnum(values));
2017 }
2018
2019 /*
2020 * Table of function pointers for default access
2021 */
2022
2023 struct registry_ops regdb_ops = {
2024 .fetch_subkeys = regdb_fetch_keys,
2025 .fetch_values = regdb_fetch_values,
2026 .store_subkeys = regdb_store_keys,
2027 .store_values = regdb_store_values,
2028 .create_subkey = regdb_create_subkey,
2029 .delete_subkey = regdb_delete_subkey,
2030 .get_secdesc = regdb_get_secdesc,
2031 .set_secdesc = regdb_set_secdesc,
2032 .subkeys_need_update = regdb_subkeys_need_update,
2033 .values_need_update = regdb_values_need_update
2034 };
reg import