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s3:registry: fix debug message in regdb_store_values_internal()
[Samba/gebeck_regimport.git] / source3 / registry / reg_backend_db.c
blob24f6a72b953d30e8da1f534c8d6c8dcba2d017cb
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_parse_internal.h"
30 #include "reg_backend_db.h"
31 #include "reg_objects.h"
32 #include "nt_printing.h"
33 #include "util_tdb.h"
34 #include "dbwrap/dbwrap.h"
35 #include "dbwrap/dbwrap_open.h"
36 #include "../libcli/security/secdesc.h"
37
38 #undef DBGC_CLASS
39 #define DBGC_CLASS DBGC_REGISTRY
40
41 #define REGDB_VERSION_KEYNAME "INFO/version"
42
43 static struct db_context *regdb = NULL;
44 static int regdb_refcount;
45
46 static bool regdb_key_exists(struct db_context *db, const char *key);
47 static WERROR regdb_fetch_keys_internal(struct db_context *db, const char *key,
48 struct regsubkey_ctr *ctr);
49 static bool regdb_store_keys_internal(struct db_context *db, const char *key,
50 struct regsubkey_ctr *ctr);
51 static int regdb_fetch_values_internal(struct db_context *db, const char* key,
52 struct regval_ctr *values);
53 static NTSTATUS regdb_store_values_internal(struct db_context *db, const char *key,
54 struct regval_ctr *values);
55 static WERROR regdb_store_subkey_list(struct db_context *db, const char *parent,
56 const char *key);
57
58 static WERROR regdb_create_basekey(struct db_context *db, const char *key);
59 static WERROR regdb_create_subkey_internal(struct db_context *db,
60 const char *key,
61 const char *subkey);
62
63
64 struct regdb_trans_ctx {
65 NTSTATUS (*action)(struct db_context *, void *);
66 void *private_data;
67 };
68
69 static NTSTATUS regdb_trans_do_action(struct db_context *db, void *private_data)
70 {
71 NTSTATUS status;
72 int32_t version_id;
73 struct regdb_trans_ctx *ctx = (struct regdb_trans_ctx *)private_data;
74
75 status = dbwrap_fetch_int32(db, REGDB_VERSION_KEYNAME, &version_id);
76
77 if (!NT_STATUS_IS_OK(status)) {
78 DEBUG(0, ("ERROR: could not fetch registry db version: %s. "
79 "Denying access.\n", nt_errstr(status)));
80 return NT_STATUS_ACCESS_DENIED;
81 }
82
83 if (version_id != REGDB_CODE_VERSION) {
84 DEBUG(0, ("ERROR: changed registry version %d found while "
85 "trying to write to the registry. Version %d "
86 "expected. Denying access.\n",
87 version_id, REGDB_CODE_VERSION));
88 return NT_STATUS_ACCESS_DENIED;
89 }
90
91 status = ctx->action(db, ctx->private_data);
92 return status;
93 }
94
95 static WERROR regdb_trans_do(struct db_context *db,
96 NTSTATUS (*action)(struct db_context *, void *),
97 void *private_data)
98 {
99 NTSTATUS status;
100 struct regdb_trans_ctx ctx;
101
102
103 ctx.action = action;
104 ctx.private_data = private_data;
105
106 status = dbwrap_trans_do(db, regdb_trans_do_action, &ctx);
107
108 return ntstatus_to_werror(status);
109 }
110
111 /* List the deepest path into the registry. All part components will be created.*/
112
113 /* If you want to have a part of the path controlled by the tdb and part by
114 a virtual registry db (e.g. printing), then you have to list the deepest path.
115 For example,"HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion/Print"
116 allows the reg_db backend to handle everything up to
117 "HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion" and then we'll hook
118 the reg_printing backend onto the last component of the path (see
119 KEY_PRINTING_2K in include/rpc_reg.h) --jerry */
120
121 static const char *builtin_registry_paths[] = {
122 KEY_PRINTING_2K,
123 KEY_PRINTING_PORTS,
124 KEY_PRINTING,
125 KEY_PRINTING "\\Forms",
126 KEY_PRINTING "\\Printers",
127 KEY_PRINTING "\\Environments\\Windows NT x86\\Print Processors\\winprint",
128 KEY_SHARES,
129 KEY_EVENTLOG,
130 KEY_SMBCONF,
131 KEY_PERFLIB,
132 KEY_PERFLIB_009,
133 KEY_GROUP_POLICY,
134 KEY_SAMBA_GROUP_POLICY,
135 KEY_GP_MACHINE_POLICY,
136 KEY_GP_MACHINE_WIN_POLICY,
137 KEY_HKCU,
138 KEY_GP_USER_POLICY,
139 KEY_GP_USER_WIN_POLICY,
140 "HKLM\\Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\GPExtensions",
141 "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Print\\Monitors",
142 KEY_PROD_OPTIONS,
143 "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Terminal Server\\DefaultUserConfiguration",
144 KEY_TCPIP_PARAMS,
145 KEY_NETLOGON_PARAMS,
146 KEY_HKU,
147 KEY_HKCR,
148 KEY_HKPD,
149 KEY_HKPT,
150 NULL };
151
152 struct builtin_regkey_value {
153 const char *path;
154 const char *valuename;
155 uint32 type;
156 union {
157 const char *string;
158 uint32 dw_value;
159 } data;
160 };
161
162 static struct builtin_regkey_value builtin_registry_values[] = {
163 { KEY_PRINTING_PORTS,
164 SAMBA_PRINTER_PORT_NAME, REG_SZ, { "" } },
165 { KEY_PRINTING_2K,
166 "DefaultSpoolDirectory", REG_SZ, { "C:\\Windows\\System32\\Spool\\Printers" } },
167 { KEY_EVENTLOG,
168 "DisplayName", REG_SZ, { "Event Log" } },
169 { KEY_EVENTLOG,
170 "ErrorControl", REG_DWORD, { (char*)0x00000001 } },
171 { NULL, NULL, 0, { NULL } }
172 };
173
174 static WERROR create_key_recursive(struct db_context *db,
175 char *path,
176 const char *subkey)
177 {
178 WERROR werr;
179 char *p;
180
181 if (subkey == NULL) {
182 return WERR_INVALID_PARAM;
183 }
184
185 if (path == NULL) {
186 return regdb_create_basekey(db, subkey);
187 }
188
189 p = strrchr_m(path, '\\');
190
191 if (p == NULL) {
192 werr = create_key_recursive(db, NULL, path);
193 } else {
194 *p = '\0';
195 werr = create_key_recursive(db, path, p+1);
196 *p = '\\';
197 }
198
199 if (!W_ERROR_IS_OK(werr)) {
200 goto done;
201 }
202
203 werr = regdb_create_subkey_internal(db, path, subkey);
204
205 done:
206 return werr;
207 }
208
209 /**
210 * Initialize a key in the registry:
211 * create each component key of the specified path.
212 */
213 static WERROR init_registry_key_internal(struct db_context *db,
214 const char *add_path)
215 {
216 char *subkey, *key;
217 WERROR werr;
218 TALLOC_CTX *frame = talloc_stackframe();
219
220 if (add_path == NULL) {
221 werr = WERR_INVALID_PARAM;
222 goto done;
223 }
224
225 key = talloc_strdup(frame, add_path);
226
227 subkey = strrchr_m(key, '\\');
228 if (subkey == NULL) {
229 subkey = key;
230 key = NULL;
231 } else {
232 *subkey = '\0';
233 subkey++;
234 }
235
236 werr = create_key_recursive(db, key, subkey);
237
238 done:
239 talloc_free(frame);
240 return werr;
241 }
242
243 struct init_registry_key_context {
244 const char *add_path;
245 };
246
247 static NTSTATUS init_registry_key_action(struct db_context *db,
248 void *private_data)
249 {
250 struct init_registry_key_context *init_ctx =
251 (struct init_registry_key_context *)private_data;
252
253 return werror_to_ntstatus(init_registry_key_internal(
254 db, init_ctx->add_path));
255 }
256
257 /**
258 * Initialize a key in the registry:
259 * create each component key of the specified path,
260 * wrapped in one db transaction.
261 */
262 WERROR init_registry_key(const char *add_path)
263 {
264 struct init_registry_key_context init_ctx;
265
266 if (regdb_key_exists(regdb, add_path)) {
267 return WERR_OK;
268 }
269
270 init_ctx.add_path = add_path;
271
272 return regdb_trans_do(regdb,
273 init_registry_key_action,
274 &init_ctx);
275 }
276
277 /***********************************************************************
278 Open the registry data in the tdb
279 ***********************************************************************/
280
281 static void regdb_ctr_add_value(struct regval_ctr *ctr,
282 struct builtin_regkey_value *value)
283 {
284 switch(value->type) {
285 case REG_DWORD:
286 regval_ctr_addvalue(ctr, value->valuename, REG_DWORD,
287 (uint8_t *)&value->data.dw_value,
288 sizeof(uint32));
289 break;
290
291 case REG_SZ:
292 regval_ctr_addvalue_sz(ctr, value->valuename,
293 value->data.string);
294 break;
295
296 default:
297 DEBUG(0, ("regdb_ctr_add_value: invalid value type in "
298 "registry values [%d]\n", value->type));
299 }
300 }
301
302 static NTSTATUS init_registry_data_action(struct db_context *db,
303 void *private_data)
304 {
305 NTSTATUS status;
306 TALLOC_CTX *frame = talloc_stackframe();
307 struct regval_ctr *values;
308 int i;
309
310 /* loop over all of the predefined paths and add each component */
311
312 for (i=0; builtin_registry_paths[i] != NULL; i++) {
313 if (regdb_key_exists(db, builtin_registry_paths[i])) {
314 continue;
315 }
316 status = werror_to_ntstatus(init_registry_key_internal(db,
317 builtin_registry_paths[i]));
318 if (!NT_STATUS_IS_OK(status)) {
319 goto done;
320 }
321 }
322
323 /* loop over all of the predefined values and add each component */
324
325 for (i=0; builtin_registry_values[i].path != NULL; i++) {
326 WERROR werr;
327
328 werr = regval_ctr_init(frame, &values);
329 if (!W_ERROR_IS_OK(werr)) {
330 status = werror_to_ntstatus(werr);
331 goto done;
332 }
333
334 regdb_fetch_values_internal(db,
335 builtin_registry_values[i].path,
336 values);
337
338 /* preserve existing values across restarts. Only add new ones */
339
340 if (!regval_ctr_value_exists(values,
341 builtin_registry_values[i].valuename))
342 {
343 regdb_ctr_add_value(values,
344 &builtin_registry_values[i]);
345 status = regdb_store_values_internal(db,
346 builtin_registry_values[i].path,
347 values);
348 if (!NT_STATUS_IS_OK(status)) {
349 goto done;
350 }
351 }
352 TALLOC_FREE(values);
353 }
354
355 status = NT_STATUS_OK;
356
357 done:
358
359 TALLOC_FREE(frame);
360 return status;
361 }
362
363 WERROR init_registry_data(void)
364 {
365 WERROR werr;
366 TALLOC_CTX *frame = talloc_stackframe();
367 struct regval_ctr *values;
368 int i;
369
370 /*
371 * First, check for the existence of the needed keys and values.
372 * If all do already exist, we can save the writes.
373 */
374 for (i=0; builtin_registry_paths[i] != NULL; i++) {
375 if (!regdb_key_exists(regdb, builtin_registry_paths[i])) {
376 goto do_init;
377 }
378 }
379
380 for (i=0; builtin_registry_values[i].path != NULL; i++) {
381 werr = regval_ctr_init(frame, &values);
382 W_ERROR_NOT_OK_GOTO_DONE(werr);
383
384 regdb_fetch_values_internal(regdb,
385 builtin_registry_values[i].path,
386 values);
387 if (!regval_ctr_value_exists(values,
388 builtin_registry_values[i].valuename))
389 {
390 TALLOC_FREE(values);
391 goto do_init;
392 }
393
394 TALLOC_FREE(values);
395 }
396
397 werr = WERR_OK;
398 goto done;
399
400 do_init:
401
402 /*
403 * There are potentially quite a few store operations which are all
404 * indiviually wrapped in tdb transactions. Wrapping them in a single
405 * transaction gives just a single transaction_commit() to actually do
406 * its fsync()s. See tdb/common/transaction.c for info about nested
407 * transaction behaviour.
408 */
409
410 werr = regdb_trans_do(regdb,
411 init_registry_data_action,
412 NULL);
413
414 done:
415 TALLOC_FREE(frame);
416 return werr;
417 }
418
419 static int regdb_normalize_keynames_fn(struct db_record *rec,
420 void *private_data)
421 {
422 TALLOC_CTX *mem_ctx = talloc_tos();
423 const char *keyname;
424 NTSTATUS status;
425 TDB_DATA key;
426 TDB_DATA value;
427 struct db_context *db = (struct db_context *)private_data;
428
429 key = dbwrap_record_get_key(rec);
430 if (key.dptr == NULL || key.dsize == 0) {
431 return 0;
432 }
433
434 value = dbwrap_record_get_value(rec);
435
436 if (db == NULL) {
437 DEBUG(0, ("regdb_normalize_keynames_fn: ERROR: "
438 "NULL db context handed in via private_data\n"));
439 return 1;
440 }
441
442 if (strncmp((const char *)key.dptr, REGDB_VERSION_KEYNAME,
443 strlen(REGDB_VERSION_KEYNAME)) == 0)
444 {
445 return 0;
446 }
447
448 keyname = strchr((const char *)key.dptr, '/');
449 if (keyname) {
450 keyname = talloc_string_sub(mem_ctx,
451 (const char *)key.dptr,
452 "/",
453 "\\");
454
455 DEBUG(2, ("regdb_normalize_keynames_fn: Convert %s to %s\n",
456 (const char *)key.dptr,
457 keyname));
458
459 /* Delete the original record and store the normalized key */
460 status = dbwrap_record_delete(rec);
461 if (!NT_STATUS_IS_OK(status)) {
462 DEBUG(0,("regdb_normalize_keynames_fn: "
463 "tdb_delete for [%s] failed!\n",
464 (const char *)key.dptr));
465 return 1;
466 }
467
468 status = dbwrap_store_bystring(db, keyname, value, TDB_REPLACE);
469 if (!NT_STATUS_IS_OK(status)) {
470 DEBUG(0,("regdb_normalize_keynames_fn: "
471 "failed to store new record for [%s]!\n",
472 keyname));
473 return 1;
474 }
475 }
476
477 return 0;
478 }
479
480 static WERROR regdb_store_regdb_version(struct db_context *db, uint32_t version)
481 {
482 NTSTATUS status;
483 if (db == NULL) {
484 return WERR_CAN_NOT_COMPLETE;
485 }
486
487 status = dbwrap_trans_store_int32(db, REGDB_VERSION_KEYNAME, version);
488 if (!NT_STATUS_IS_OK(status)) {
489 DEBUG(1, ("regdb_store_regdb_version: error storing %s = %d: %s\n",
490 REGDB_VERSION_KEYNAME, version, nt_errstr(status)));
491 return ntstatus_to_werror(status);
492 } else {
493 DEBUG(10, ("regdb_store_regdb_version: stored %s = %d\n",
494 REGDB_VERSION_KEYNAME, version));
495 return WERR_OK;
496 }
497 }
498
499 static WERROR regdb_upgrade_v1_to_v2(struct db_context *db)
500 {
501 TALLOC_CTX *mem_ctx;
502 NTSTATUS status;
503 WERROR werr;
504
505 mem_ctx = talloc_stackframe();
506
507 status = dbwrap_traverse(db, regdb_normalize_keynames_fn, db, NULL);
508 if (!NT_STATUS_IS_OK(status)) {
509 werr = WERR_REG_IO_FAILURE;
510 goto done;
511 }
512
513 werr = regdb_store_regdb_version(db, REGDB_VERSION_V2);
514
515 done:
516 talloc_free(mem_ctx);
517 return werr;
518 }
519
520 static bool tdb_data_read_uint32(TDB_DATA *buf, uint32_t *result)
521 {
522 const size_t len = sizeof(uint32_t);
523 if (buf->dsize >= len) {
524 *result = IVAL(buf->dptr, 0);
525 buf->dptr += len;
526 buf->dsize -= len;
527 return true;
528 }
529 return false;
530 }
531
532 static bool tdb_data_read_cstr(TDB_DATA *buf, char **result)
533 {
534 const size_t len = strnlen((char*)buf->dptr, buf->dsize) + 1;
535 if (buf->dsize >= len) {
536 *result = (char*)buf->dptr;
537 buf->dptr += len;
538 buf->dsize -= len;
539 return true;
540 }
541 return false;
542 }
543
544 static bool tdb_data_is_cstr(TDB_DATA d) {
545 if (tdb_data_is_empty(d) || (d.dptr[d.dsize-1] != '\0')) {
546 return false;
547 }
548 return strchr((char *)d.dptr, '\0') == (char *)&d.dptr[d.dsize-1];
549 }
550
551 static bool upgrade_v2_to_v3_check_subkeylist(struct db_context *db,
552 const char *key,
553 const char *subkey)
554 {
555 static uint32_t zero = 0;
556 static TDB_DATA empty_subkey_list = {
557 .dptr = (unsigned char*)&zero,
558 .dsize = sizeof(uint32_t),
559 };
560 bool success = false;
561 char *path = talloc_asprintf(talloc_tos(), "%s\\%s", key, subkey);
562 strupper_m(path);
563
564 if (!dbwrap_exists(db, string_term_tdb_data(path))) {
565 NTSTATUS status;
566
567 DEBUG(10, ("regdb_upgrade_v2_to_v3: writing subkey list [%s]\n",
568 path));
569
570 status = dbwrap_store_bystring(db, path, empty_subkey_list,
571 TDB_INSERT);
572 if (!NT_STATUS_IS_OK(status)) {
573 DEBUG(0, ("regdb_upgrade_v2_to_v3: writing subkey list "
574 "[%s] failed\n", path));
575 goto done;
576 }
577 }
578 success = true;
579 done:
580 talloc_free(path);
581 return success;
582 }
583
584 static bool upgrade_v2_to_v3_check_parent(struct db_context *db,
585 const char *key)
586 {
587 const char *sep = strrchr_m(key, '\\');
588 if (sep != NULL) {
589 char *pkey = talloc_strndup(talloc_tos(), key, sep-key);
590 if (!dbwrap_exists(db, string_term_tdb_data(pkey))) {
591 DEBUG(0, ("regdb_upgrade_v2_to_v3: missing subkey list "
592 "[%s]\nrun \"net registry check\"\n", pkey));
593 }
594 talloc_free(pkey);
595 }
596 return true;
597 }
598
599
600 #define IS_EQUAL(d,s) (((d).dsize == strlen(s)+1) && \
601 (strcmp((char*)(d).dptr, (s)) == 0))
602 #define STARTS_WITH(d,s) (((d).dsize > strlen(s)) && \
603 (strncmp((char*)(d).dptr, (s), strlen(s)) == 0))
604 #define SSTR(d) (int)(d).dsize , (char*)(d).dptr
605
606
607 static int regdb_upgrade_v2_to_v3_fn(struct db_record *rec, void *private_data)
608 {
609 struct db_context *db = (struct db_context *)private_data;
610 TDB_DATA key = dbwrap_record_get_key(rec);
611 TDB_DATA val = dbwrap_record_get_value(rec);
612
613 if (tdb_data_is_empty(key)) {
614 return 0;
615 }
616
617 if (db == NULL) {
618 DEBUG(0, ("regdb_upgrade_v2_to_v3_fn: ERROR: "
619 "NULL db context handed in via private_data\n"));
620 return 1;
621 }
622
623 if (IS_EQUAL(key, REGDB_VERSION_KEYNAME) ||
624 STARTS_WITH(key, REG_VALUE_PREFIX) ||
625 STARTS_WITH(key, REG_SECDESC_PREFIX))
626 {
627 DEBUG(10, ("regdb_upgrade_v2_to_v3: skipping [%.*s]\n",
628 SSTR(key)));
629 return 0;
630 }
631
632 if (STARTS_WITH(key, REG_SORTED_SUBKEYS_PREFIX)) {
633 NTSTATUS status;
634 /* Delete the deprecated sorted subkeys cache. */
635
636 DEBUG(10, ("regdb_upgrade_v2_to_v3: deleting [%.*s]\n",
637 SSTR(key)));
638
639 status = dbwrap_record_delete(rec);
640 if (!NT_STATUS_IS_OK(status)) {
641 DEBUG(0, ("regdb_upgrade_v2_to_v3: deleting [%.*s] "
642 "failed!\n", SSTR(key)));
643 return 1;
644 }
645
646 return 0;
647 }
648
649 if ( tdb_data_is_cstr(key) &&
650 hive_info((char*)key.dptr) != NULL )
651 {
652 /*
653 * Found a regular subkey list record.
654 * Walk the list and create the list record for those
655 * subkeys that don't already have one.
656 */
657 TDB_DATA pos = val;
658 char *subkey, *path = (char*)key.dptr;
659 uint32_t num_items, found_items = 0;
660
661
662 DEBUG(10, ("regdb_upgrade_v2_to_v3: scanning subkeylist of "
663 "[%s]\n", path));
664
665 if (!tdb_data_read_uint32(&pos, &num_items)) {
666 /* invalid or empty - skip */
667 return 0;
668 }
669
670 while (tdb_data_read_cstr(&pos, &subkey)) {
671 found_items++;
672
673 if (!upgrade_v2_to_v3_check_subkeylist(db, path, subkey))
674 {
675 return 1;
676 }
677
678 if (!upgrade_v2_to_v3_check_parent(db, path)) {
679 return 1;
680 }
681 }
682 if (found_items != num_items) {
683 DEBUG(0, ("regdb_upgrade_v2_to_v3: inconsistent subkey "
684 "list [%s]\nrun \"net registry check\"\n",
685 path));
686 }
687 } else {
688 DEBUG(10, ("regdb_upgrade_v2_to_v3: skipping invalid [%.*s]\n"
689 "run \"net registry check\"\n", SSTR(key)));
690 }
691
692 return 0;
693 }
694
695 static WERROR regdb_upgrade_v2_to_v3(struct db_context *db)
696 {
697 NTSTATUS status;
698 WERROR werr;
699
700 status = dbwrap_traverse(db, regdb_upgrade_v2_to_v3_fn, db, NULL);
701 if (!NT_STATUS_IS_OK(status)) {
702 werr = WERR_REG_IO_FAILURE;
703 goto done;
704 }
705
706 werr = regdb_store_regdb_version(db, REGDB_VERSION_V3);
707
708 done:
709 return werr;
710 }
711
712 /***********************************************************************
713 Open the registry database
714 ***********************************************************************/
715
716 WERROR regdb_init(void)
717 {
718 int32_t vers_id;
719 WERROR werr;
720 NTSTATUS status;
721
722 if (regdb) {
723 DEBUG(10, ("regdb_init: incrementing refcount (%d->%d)\n",
724 regdb_refcount, regdb_refcount+1));
725 regdb_refcount++;
726 return WERR_OK;
727 }
728
729 regdb = db_open(NULL, state_path("registry.tdb"), 0,
730 REG_TDB_FLAGS, O_RDWR, 0600,
731 DBWRAP_LOCK_ORDER_1);
732 if (!regdb) {
733 regdb = db_open(NULL, state_path("registry.tdb"), 0,
734 REG_TDB_FLAGS, O_RDWR|O_CREAT, 0600,
735 DBWRAP_LOCK_ORDER_1);
736 if (!regdb) {
737 werr = ntstatus_to_werror(map_nt_error_from_unix(errno));
738 DEBUG(1,("regdb_init: Failed to open registry %s (%s)\n",
739 state_path("registry.tdb"), strerror(errno) ));
740 return werr;
741 }
742
743 werr = regdb_store_regdb_version(regdb, REGDB_CODE_VERSION);
744 if (!W_ERROR_IS_OK(werr)) {
745 DEBUG(1, ("regdb_init: Failed to store version: %s\n",
746 win_errstr(werr)));
747 return werr;
748 }
749
750 DEBUG(10,("regdb_init: Successfully created registry tdb\n"));
751 }
752
753 regdb_refcount = 1;
754 DEBUG(10, ("regdb_init: registry db openend. refcount reset (%d)\n",
755 regdb_refcount));
756
757 status = dbwrap_fetch_int32(regdb, REGDB_VERSION_KEYNAME, &vers_id);
758 if (!NT_STATUS_IS_OK(status)) {
759 DEBUG(10, ("regdb_init: registry version uninitialized "
760 "(got %d), initializing to version %d\n",
761 vers_id, REGDB_VERSION_V1));
762
763 /*
764 * There was a regdb format version prior to version 1
765 * which did not store a INFO/version key. The format
766 * of this version was identical to version 1 except for
767 * the lack of the sorted subkey cache records.
768 * Since these are disposable, we can safely assume version
769 * 1 if no INFO/version key is found and run the db through
770 * the whole chain of upgrade. If the database was not
771 * initialized, this does not harm. If it was the unversioned
772 * version ("0"), then it do the right thing with the records.
773 */
774 werr = regdb_store_regdb_version(regdb, REGDB_VERSION_V1);
775 if (!W_ERROR_IS_OK(werr)) {
776 return werr;
777 }
778 vers_id = REGDB_VERSION_V1;
779 }
780
781 if (vers_id == REGDB_CODE_VERSION) {
782 return WERR_OK;
783 }
784
785 if (vers_id > REGDB_CODE_VERSION || vers_id == 0) {
786 DEBUG(0, ("regdb_init: unknown registry version %d "
787 "(code version = %d), refusing initialization\n",
788 vers_id, REGDB_CODE_VERSION));
789 return WERR_CAN_NOT_COMPLETE;
790 }
791
792 if (dbwrap_transaction_start(regdb) != 0) {
793 return WERR_REG_IO_FAILURE;
794 }
795
796 if (vers_id == REGDB_VERSION_V1) {
797 DEBUG(10, ("regdb_init: upgrading registry from version %d "
798 "to %d\n", REGDB_VERSION_V1, REGDB_VERSION_V2));
799
800 werr = regdb_upgrade_v1_to_v2(regdb);
801 if (!W_ERROR_IS_OK(werr)) {
802 dbwrap_transaction_cancel(regdb);
803 return werr;
804 }
805
806 vers_id = REGDB_VERSION_V2;
807 }
808
809 if (vers_id == REGDB_VERSION_V2) {
810 DEBUG(10, ("regdb_init: upgrading registry from version %d "
811 "to %d\n", REGDB_VERSION_V2, REGDB_VERSION_V3));
812
813 werr = regdb_upgrade_v2_to_v3(regdb);
814 if (!W_ERROR_IS_OK(werr)) {
815 dbwrap_transaction_cancel(regdb);
816 return werr;
817 }
818
819 vers_id = REGDB_VERSION_V3;
820 }
821
822 /* future upgrade code should go here */
823
824 if (dbwrap_transaction_commit(regdb) != 0) {
825 return WERR_REG_IO_FAILURE;
826 }
827
828 return WERR_OK;
829 }
830
831 /***********************************************************************
832 Open the registry. Must already have been initialized by regdb_init()
833 ***********************************************************************/
834
835 WERROR regdb_open( void )
836 {
837 WERROR result = WERR_OK;
838
839 if ( regdb ) {
840 DEBUG(10, ("regdb_open: incrementing refcount (%d->%d)\n",
841 regdb_refcount, regdb_refcount+1));
842 regdb_refcount++;
843 return WERR_OK;
844 }
845
846 become_root();
847
848 regdb = db_open(NULL, state_path("registry.tdb"), 0,
849 REG_TDB_FLAGS, O_RDWR, 0600,
850 DBWRAP_LOCK_ORDER_1);
851 if ( !regdb ) {
852 result = ntstatus_to_werror( map_nt_error_from_unix( errno ) );
853 DEBUG(0,("regdb_open: Failed to open %s! (%s)\n",
854 state_path("registry.tdb"), strerror(errno) ));
855 }
856
857 unbecome_root();
858
859 regdb_refcount = 1;
860 DEBUG(10, ("regdb_open: registry db opened. refcount reset (%d)\n",
861 regdb_refcount));
862
863 return result;
864 }
865
866 /***********************************************************************
867 ***********************************************************************/
868
869 int regdb_close( void )
870 {
871 if (regdb_refcount == 0) {
872 return 0;
873 }
874
875 regdb_refcount--;
876
877 DEBUG(10, ("regdb_close: decrementing refcount (%d->%d)\n",
878 regdb_refcount+1, regdb_refcount));
879
880 if ( regdb_refcount > 0 )
881 return 0;
882
883 SMB_ASSERT( regdb_refcount >= 0 );
884
885 TALLOC_FREE(regdb);
886 return 0;
887 }
888
889 WERROR regdb_transaction_start(void)
890 {
891 return (dbwrap_transaction_start(regdb) == 0) ?
892 WERR_OK : WERR_REG_IO_FAILURE;
893 }
894
895 WERROR regdb_transaction_commit(void)
896 {
897 return (dbwrap_transaction_commit(regdb) == 0) ?
898 WERR_OK : WERR_REG_IO_FAILURE;
899 }
900
901 WERROR regdb_transaction_cancel(void)
902 {
903 return (dbwrap_transaction_cancel(regdb) == 0) ?
904 WERR_OK : WERR_REG_IO_FAILURE;
905 }
906
907 /***********************************************************************
908 return the tdb sequence number of the registry tdb.
909 this is an indicator for the content of the registry
910 having changed. it will change upon regdb_init, too, though.
911 ***********************************************************************/
912 int regdb_get_seqnum(void)
913 {
914 return dbwrap_get_seqnum(regdb);
915 }
916
917
918 static WERROR regdb_delete_key_with_prefix(struct db_context *db,
919 const char *keyname,
920 const char *prefix)
921 {
922 char *path;
923 WERROR werr = WERR_NOMEM;
924 TALLOC_CTX *mem_ctx = talloc_stackframe();
925
926 if (keyname == NULL) {
927 werr = WERR_INVALID_PARAM;
928 goto done;
929 }
930
931 if (prefix == NULL) {
932 path = discard_const_p(char, keyname);
933 } else {
934 path = talloc_asprintf(mem_ctx, "%s\\%s", prefix, keyname);
935 if (path == NULL) {
936 goto done;
937 }
938 }
939
940 path = normalize_reg_path(mem_ctx, path);
941 if (path == NULL) {
942 goto done;
943 }
944
945 werr = ntstatus_to_werror(dbwrap_delete_bystring(db, path));
946
947 /* treat "not found" as ok */
948 if (W_ERROR_EQUAL(werr, WERR_NOT_FOUND)) {
949 werr = WERR_OK;
950 }
951
952 done:
953 talloc_free(mem_ctx);
954 return werr;
955 }
956
957
958 static WERROR regdb_delete_values(struct db_context *db, const char *keyname)
959 {
960 return regdb_delete_key_with_prefix(db, keyname, REG_VALUE_PREFIX);
961 }
962
963 static WERROR regdb_delete_secdesc(struct db_context *db, const char *keyname)
964 {
965 return regdb_delete_key_with_prefix(db, keyname, REG_SECDESC_PREFIX);
966 }
967
968 static WERROR regdb_delete_subkeylist(struct db_context *db, const char *keyname)
969 {
970 return regdb_delete_key_with_prefix(db, keyname, NULL);
971 }
972
973
974 static WERROR regdb_delete_key_lists(struct db_context *db, const char *keyname)
975 {
976 WERROR werr;
977
978 werr = regdb_delete_values(db, keyname);
979 if (!W_ERROR_IS_OK(werr)) {
980 DEBUG(1, (__location__ " Deleting %s\\%s failed: %s\n",
981 REG_VALUE_PREFIX, keyname, win_errstr(werr)));
982 goto done;
983 }
984
985 werr = regdb_delete_secdesc(db, keyname);
986 if (!W_ERROR_IS_OK(werr)) {
987 DEBUG(1, (__location__ " Deleting %s\\%s failed: %s\n",
988 REG_SECDESC_PREFIX, keyname, win_errstr(werr)));
989 goto done;
990 }
991
992 werr = regdb_delete_subkeylist(db, keyname);
993 if (!W_ERROR_IS_OK(werr)) {
994 DEBUG(1, (__location__ " Deleting %s failed: %s\n",
995 keyname, win_errstr(werr)));
996 goto done;
997 }
998
999 done:
1000 return werr;
1001 }
1002
1003 /***********************************************************************
1004 Add subkey strings to the registry tdb under a defined key
1005 fmt is the same format as tdb_pack except this function only supports
1006 fstrings
1007 ***********************************************************************/
1008
1009 static WERROR regdb_store_keys_internal2(struct db_context *db,
1010 const char *key,
1011 struct regsubkey_ctr *ctr)
1012 {
1013 TDB_DATA dbuf;
1014 uint8 *buffer = NULL;
1015 int i = 0;
1016 uint32 len, buflen;
1017 uint32 num_subkeys = regsubkey_ctr_numkeys(ctr);
1018 char *keyname = NULL;
1019 TALLOC_CTX *ctx = talloc_stackframe();
1020 WERROR werr;
1021
1022 if (!key) {
1023 werr = WERR_INVALID_PARAM;
1024 goto done;
1025 }
1026
1027 keyname = talloc_strdup(ctx, key);
1028 if (!keyname) {
1029 werr = WERR_NOMEM;
1030 goto done;
1031 }
1032
1033 keyname = normalize_reg_path(ctx, keyname);
1034 if (!keyname) {
1035 werr = WERR_NOMEM;
1036 goto done;
1037 }
1038
1039 /* allocate some initial memory */
1040
1041 buffer = (uint8 *)SMB_MALLOC(1024);
1042 if (buffer == NULL) {
1043 werr = WERR_NOMEM;
1044 goto done;
1045 }
1046 buflen = 1024;
1047 len = 0;
1048
1049 /* store the number of subkeys */
1050
1051 len += tdb_pack(buffer+len, buflen-len, "d", num_subkeys);
1052
1053 /* pack all the strings */
1054
1055 for (i=0; i<num_subkeys; i++) {
1056 size_t thistime;
1057
1058 thistime = tdb_pack(buffer+len, buflen-len, "f",
1059 regsubkey_ctr_specific_key(ctr, i));
1060 if (len+thistime > buflen) {
1061 size_t thistime2;
1062 /*
1063 * tdb_pack hasn't done anything because of the short
1064 * buffer, allocate extra space.
1065 */
1066 buffer = SMB_REALLOC_ARRAY(buffer, uint8_t,
1067 (len+thistime)*2);
1068 if(buffer == NULL) {
1069 DEBUG(0, ("regdb_store_keys: Failed to realloc "
1070 "memory of size [%u]\n",
1071 (unsigned int)(len+thistime)*2));
1072 werr = WERR_NOMEM;
1073 goto done;
1074 }
1075 buflen = (len+thistime)*2;
1076 thistime2 = tdb_pack(
1077 buffer+len, buflen-len, "f",
1078 regsubkey_ctr_specific_key(ctr, i));
1079 if (thistime2 != thistime) {
1080 DEBUG(0, ("tdb_pack failed\n"));
1081 werr = WERR_CAN_NOT_COMPLETE;
1082 goto done;
1083 }
1084 }
1085 len += thistime;
1086 }
1087
1088 /* finally write out the data */
1089
1090 dbuf.dptr = buffer;
1091 dbuf.dsize = len;
1092 werr = ntstatus_to_werror(dbwrap_store_bystring(db, keyname, dbuf,
1093 TDB_REPLACE));
1094
1095 done:
1096 TALLOC_FREE(ctx);
1097 SAFE_FREE(buffer);
1098 return werr;
1099 }
1100
1101 /**
1102 * Utility function to store a new empty list of
1103 * subkeys of given key specified as parent and subkey name
1104 * (thereby creating the key).
1105 * If the parent keyname is NULL, then the "subkey" is
1106 * interpreted as a base key.
1107 * If the subkey list does already exist, it is not modified.
1108 *
1109 * Must be called from within a transaction.
1110 */
1111 static WERROR regdb_store_subkey_list(struct db_context *db, const char *parent,
1112 const char *key)
1113 {
1114 WERROR werr;
1115 char *path = NULL;
1116 struct regsubkey_ctr *subkeys = NULL;
1117 TALLOC_CTX *frame = talloc_stackframe();
1118
1119 if (parent == NULL) {
1120 path = talloc_strdup(frame, key);
1121 } else {
1122 path = talloc_asprintf(frame, "%s\\%s", parent, key);
1123 }
1124 if (!path) {
1125 werr = WERR_NOMEM;
1126 goto done;
1127 }
1128
1129 werr = regsubkey_ctr_init(frame, &subkeys);
1130 W_ERROR_NOT_OK_GOTO_DONE(werr);
1131
1132 werr = regdb_fetch_keys_internal(db, path, subkeys);
1133 if (W_ERROR_IS_OK(werr)) {
1134 /* subkey list exists already - don't modify */
1135 goto done;
1136 }
1137
1138 werr = regsubkey_ctr_reinit(subkeys);
1139 W_ERROR_NOT_OK_GOTO_DONE(werr);
1140
1141 /* create a record with 0 subkeys */
1142 werr = regdb_store_keys_internal2(db, path, subkeys);
1143 if (!W_ERROR_IS_OK(werr)) {
1144 DEBUG(0, ("regdb_store_keys: Failed to store new record for "
1145 "key [%s]: %s\n", path, win_errstr(werr)));
1146 goto done;
1147 }
1148
1149 done:
1150 talloc_free(frame);
1151 return werr;
1152 }
1153
1154 /***********************************************************************
1155 Store the new subkey record and create any child key records that
1156 do not currently exist
1157 ***********************************************************************/
1158
1159 struct regdb_store_keys_context {
1160 const char *key;
1161 struct regsubkey_ctr *ctr;
1162 };
1163
1164 static NTSTATUS regdb_store_keys_action(struct db_context *db,
1165 void *private_data)
1166 {
1167 struct regdb_store_keys_context *store_ctx;
1168 WERROR werr;
1169 int num_subkeys, i;
1170 char *path = NULL;
1171 struct regsubkey_ctr *old_subkeys = NULL;
1172 char *oldkeyname = NULL;
1173 TALLOC_CTX *mem_ctx = talloc_stackframe();
1174
1175 store_ctx = (struct regdb_store_keys_context *)private_data;
1176
1177 /*
1178 * Re-fetch the old keys inside the transaction
1179 */
1180
1181 werr = regsubkey_ctr_init(mem_ctx, &old_subkeys);
1182 W_ERROR_NOT_OK_GOTO_DONE(werr);
1183
1184 werr = regdb_fetch_keys_internal(db, store_ctx->key, old_subkeys);
1185 if (!W_ERROR_IS_OK(werr) &&
1186 !W_ERROR_EQUAL(werr, WERR_NOT_FOUND))
1187 {
1188 goto done;
1189 }
1190
1191 /*
1192 * Make the store operation as safe as possible without transactions:
1193 *
1194 * (1) For each subkey removed from ctr compared with old_subkeys:
1195 *
1196 * (a) First delete the value db entry.
1197 *
1198 * (b) Next delete the secdesc db record.
1199 *
1200 * (c) Then delete the subkey list entry.
1201 *
1202 * (2) Now write the list of subkeys of the parent key,
1203 * deleting removed entries and adding new ones.
1204 *
1205 * (3) Finally create the subkey list entries for the added keys.
1206 *
1207 * This way if we crash half-way in between deleting the subkeys
1208 * and storing the parent's list of subkeys, no old data can pop up
1209 * out of the blue when re-adding keys later on.
1210 */
1211
1212 /* (1) delete removed keys' lists (values/secdesc/subkeys) */
1213
1214 num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
1215 for (i=0; i<num_subkeys; i++) {
1216 oldkeyname = regsubkey_ctr_specific_key(old_subkeys, i);
1217
1218 if (regsubkey_ctr_key_exists(store_ctx->ctr, oldkeyname)) {
1219 /*
1220 * It's still around, don't delete
1221 */
1222 continue;
1223 }
1224
1225 path = talloc_asprintf(mem_ctx, "%s\\%s", store_ctx->key,
1226 oldkeyname);
1227 if (!path) {
1228 werr = WERR_NOMEM;
1229 goto done;
1230 }
1231
1232 werr = regdb_delete_key_lists(db, path);
1233 W_ERROR_NOT_OK_GOTO_DONE(werr);
1234
1235 TALLOC_FREE(path);
1236 }
1237
1238 TALLOC_FREE(old_subkeys);
1239
1240 /* (2) store the subkey list for the parent */
1241
1242 werr = regdb_store_keys_internal2(db, store_ctx->key, store_ctx->ctr);
1243 if (!W_ERROR_IS_OK(werr)) {
1244 DEBUG(0,("regdb_store_keys: Failed to store new subkey list "
1245 "for parent [%s]: %s\n", store_ctx->key,
1246 win_errstr(werr)));
1247 goto done;
1248 }
1249
1250 /* (3) now create records for any subkeys that don't already exist */
1251
1252 num_subkeys = regsubkey_ctr_numkeys(store_ctx->ctr);
1253
1254 for (i=0; i<num_subkeys; i++) {
1255 const char *subkey;
1256
1257 subkey = regsubkey_ctr_specific_key(store_ctx->ctr, i);
1258
1259 werr = regdb_store_subkey_list(db, store_ctx->key, subkey);
1260 W_ERROR_NOT_OK_GOTO_DONE(werr);
1261 }
1262
1263 werr = WERR_OK;
1264
1265 done:
1266 talloc_free(mem_ctx);
1267 return werror_to_ntstatus(werr);
1268 }
1269
1270 static bool regdb_store_keys_internal(struct db_context *db, const char *key,
1271 struct regsubkey_ctr *ctr)
1272 {
1273 int num_subkeys, old_num_subkeys, i;
1274 struct regsubkey_ctr *old_subkeys = NULL;
1275 TALLOC_CTX *ctx = talloc_stackframe();
1276 WERROR werr;
1277 bool ret = false;
1278 struct regdb_store_keys_context store_ctx;
1279
1280 if (!regdb_key_exists(db, key)) {
1281 goto done;
1282 }
1283
1284 /*
1285 * fetch a list of the old subkeys so we can determine if anything has
1286 * changed
1287 */
1288
1289 werr = regsubkey_ctr_init(ctx, &old_subkeys);
1290 if (!W_ERROR_IS_OK(werr)) {
1291 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
1292 goto done;
1293 }
1294
1295 werr = regdb_fetch_keys_internal(db, key, old_subkeys);
1296 if (!W_ERROR_IS_OK(werr) &&
1297 !W_ERROR_EQUAL(werr, WERR_NOT_FOUND))
1298 {
1299 goto done;
1300 }
1301
1302 num_subkeys = regsubkey_ctr_numkeys(ctr);
1303 old_num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
1304 if ((num_subkeys && old_num_subkeys) &&
1305 (num_subkeys == old_num_subkeys)) {
1306
1307 for (i = 0; i < num_subkeys; i++) {
1308 if (strcmp(regsubkey_ctr_specific_key(ctr, i),
1309 regsubkey_ctr_specific_key(old_subkeys, i))
1310 != 0)
1311 {
1312 break;
1313 }
1314 }
1315 if (i == num_subkeys) {
1316 /*
1317 * Nothing changed, no point to even start a tdb
1318 * transaction
1319 */
1320
1321 ret = true;
1322 goto done;
1323 }
1324 }
1325
1326 TALLOC_FREE(old_subkeys);
1327
1328 store_ctx.key = key;
1329 store_ctx.ctr = ctr;
1330
1331 werr = regdb_trans_do(db,
1332 regdb_store_keys_action,
1333 &store_ctx);
1334
1335 ret = W_ERROR_IS_OK(werr);
1336
1337 done:
1338 TALLOC_FREE(ctx);
1339
1340 return ret;
1341 }
1342
1343 static bool regdb_store_keys(const char *key, struct regsubkey_ctr *ctr)
1344 {
1345 return regdb_store_keys_internal(regdb, key, ctr);
1346 }
1347
1348 /**
1349 * create a subkey of a given key
1350 */
1351
1352 struct regdb_create_subkey_context {
1353 const char *key;
1354 const char *subkey;
1355 };
1356
1357 static NTSTATUS regdb_create_subkey_action(struct db_context *db,
1358 void *private_data)
1359 {
1360 WERROR werr;
1361 struct regdb_create_subkey_context *create_ctx;
1362 struct regsubkey_ctr *subkeys;
1363 TALLOC_CTX *mem_ctx = talloc_stackframe();
1364
1365 create_ctx = (struct regdb_create_subkey_context *)private_data;
1366
1367 werr = regsubkey_ctr_init(mem_ctx, &subkeys);
1368 W_ERROR_NOT_OK_GOTO_DONE(werr);
1369
1370 werr = regdb_fetch_keys_internal(db, create_ctx->key, subkeys);
1371 W_ERROR_NOT_OK_GOTO_DONE(werr);
1372
1373 werr = regsubkey_ctr_addkey(subkeys, create_ctx->subkey);
1374 W_ERROR_NOT_OK_GOTO_DONE(werr);
1375
1376 werr = regdb_store_keys_internal2(db, create_ctx->key, subkeys);
1377 if (!W_ERROR_IS_OK(werr)) {
1378 DEBUG(0, (__location__ " failed to store new subkey list for "
1379 "parent key %s: %s\n", create_ctx->key,
1380 win_errstr(werr)));
1381 }
1382
1383 werr = regdb_store_subkey_list(db, create_ctx->key, create_ctx->subkey);
1384
1385 done:
1386 talloc_free(mem_ctx);
1387 return werror_to_ntstatus(werr);
1388 }
1389
1390 static WERROR regdb_create_subkey_internal(struct db_context *db,
1391 const char *key,
1392 const char *subkey)
1393 {
1394 WERROR werr;
1395 struct regsubkey_ctr *subkeys;
1396 TALLOC_CTX *mem_ctx = talloc_stackframe();
1397 struct regdb_create_subkey_context create_ctx;
1398
1399 if (!regdb_key_exists(db, key)) {
1400 werr = WERR_NOT_FOUND;
1401 goto done;
1402 }
1403
1404 werr = regsubkey_ctr_init(mem_ctx, &subkeys);
1405 W_ERROR_NOT_OK_GOTO_DONE(werr);
1406
1407 werr = regdb_fetch_keys_internal(db, key, subkeys);
1408 W_ERROR_NOT_OK_GOTO_DONE(werr);
1409
1410 if (regsubkey_ctr_key_exists(subkeys, subkey)) {
1411 char *newkey;
1412
1413 newkey = talloc_asprintf(mem_ctx, "%s\\%s", key, subkey);
1414 if (newkey == NULL) {
1415 werr = WERR_NOMEM;
1416 goto done;
1417 }
1418
1419 if (regdb_key_exists(db, newkey)) {
1420 werr = WERR_OK;
1421 goto done;
1422 }
1423 }
1424
1425 talloc_free(subkeys);
1426
1427 create_ctx.key = key;
1428 create_ctx.subkey = subkey;
1429
1430 werr = regdb_trans_do(db,
1431 regdb_create_subkey_action,
1432 &create_ctx);
1433
1434 done:
1435 talloc_free(mem_ctx);
1436 return werr;
1437 }
1438
1439 static WERROR regdb_create_subkey(const char *key, const char *subkey)
1440 {
1441 return regdb_create_subkey_internal(regdb, key, subkey);
1442 }
1443
1444 /**
1445 * create a base key
1446 */
1447
1448 struct regdb_create_basekey_context {
1449 const char *key;
1450 };
1451
1452 static NTSTATUS regdb_create_basekey_action(struct db_context *db,
1453 void *private_data)
1454 {
1455 WERROR werr;
1456 struct regdb_create_basekey_context *create_ctx;
1457
1458 create_ctx = (struct regdb_create_basekey_context *)private_data;
1459
1460 werr = regdb_store_subkey_list(db, NULL, create_ctx->key);
1461
1462 return werror_to_ntstatus(werr);
1463 }
1464
1465 static WERROR regdb_create_basekey(struct db_context *db, const char *key)
1466 {
1467 WERROR werr;
1468 struct regdb_create_subkey_context create_ctx;
1469
1470 create_ctx.key = key;
1471
1472 werr = regdb_trans_do(db,
1473 regdb_create_basekey_action,
1474 &create_ctx);
1475
1476 return werr;
1477 }
1478
1479 /**
1480 * create a subkey of a given key
1481 */
1482
1483 struct regdb_delete_subkey_context {
1484 const char *key;
1485 const char *subkey;
1486 const char *path;
1487 bool lazy;
1488 };
1489
1490 static NTSTATUS regdb_delete_subkey_action(struct db_context *db,
1491 void *private_data)
1492 {
1493 WERROR werr;
1494 struct regdb_delete_subkey_context *delete_ctx;
1495 struct regsubkey_ctr *subkeys;
1496 TALLOC_CTX *mem_ctx = talloc_stackframe();
1497
1498 delete_ctx = (struct regdb_delete_subkey_context *)private_data;
1499
1500 werr = regdb_delete_key_lists(db, delete_ctx->path);
1501 W_ERROR_NOT_OK_GOTO_DONE(werr);
1502
1503 if (delete_ctx->lazy) {
1504 goto done;
1505 }
1506
1507 werr = regsubkey_ctr_init(mem_ctx, &subkeys);
1508 W_ERROR_NOT_OK_GOTO_DONE(werr);
1509
1510 werr = regdb_fetch_keys_internal(db, delete_ctx->key, subkeys);
1511 W_ERROR_NOT_OK_GOTO_DONE(werr);
1512
1513 werr = regsubkey_ctr_delkey(subkeys, delete_ctx->subkey);
1514 W_ERROR_NOT_OK_GOTO_DONE(werr);
1515
1516 werr = regdb_store_keys_internal2(db, delete_ctx->key, subkeys);
1517 if (!W_ERROR_IS_OK(werr)) {
1518 DEBUG(0, (__location__ " failed to store new subkey_list for "
1519 "parent key %s: %s\n", delete_ctx->key,
1520 win_errstr(werr)));
1521 }
1522
1523 done:
1524 talloc_free(mem_ctx);
1525 return werror_to_ntstatus(werr);
1526 }
1527
1528 static WERROR regdb_delete_subkey(const char *key, const char *subkey, bool lazy)
1529 {
1530 WERROR werr;
1531 char *path;
1532 struct regdb_delete_subkey_context delete_ctx;
1533 TALLOC_CTX *mem_ctx = talloc_stackframe();
1534
1535 if (!regdb_key_exists(regdb, key)) {
1536 werr = WERR_NOT_FOUND;
1537 goto done;
1538 }
1539
1540 path = talloc_asprintf(mem_ctx, "%s\\%s", key, subkey);
1541 if (path == NULL) {
1542 werr = WERR_NOMEM;
1543 goto done;
1544 }
1545
1546 if (!regdb_key_exists(regdb, path)) {
1547 werr = WERR_OK;
1548 goto done;
1549 }
1550
1551 delete_ctx.key = key;
1552 delete_ctx.subkey = subkey;
1553 delete_ctx.path = path;
1554 delete_ctx.lazy = lazy;
1555
1556 werr = regdb_trans_do(regdb,
1557 regdb_delete_subkey_action,
1558 &delete_ctx);
1559
1560 done:
1561 talloc_free(mem_ctx);
1562 return werr;
1563 }
1564
1565 static TDB_DATA regdb_fetch_key_internal(struct db_context *db,
1566 TALLOC_CTX *mem_ctx, const char *key)
1567 {
1568 char *path = NULL;
1569 TDB_DATA data;
1570 NTSTATUS status;
1571
1572 path = normalize_reg_path(mem_ctx, key);
1573 if (!path) {
1574 return make_tdb_data(NULL, 0);
1575 }
1576
1577 status = dbwrap_fetch_bystring(db, mem_ctx, path, &data);
1578 if (!NT_STATUS_IS_OK(status)) {
1579 data = tdb_null;
1580 }
1581
1582 TALLOC_FREE(path);
1583 return data;
1584 }
1585
1586
1587 /**
1588 * Check for the existence of a key.
1589 *
1590 * Existence of a key is authoritatively defined by
1591 * the existence of the record that contains the list
1592 * of its subkeys.
1593 *
1594 * Return false, if the record does not match the correct
1595 * structure of an initial 4-byte counter and then a
1596 * list of the corresponding number of zero-terminated
1597 * strings.
1598 */
1599 static bool regdb_key_exists(struct db_context *db, const char *key)
1600 {
1601 TALLOC_CTX *mem_ctx = talloc_stackframe();
1602 TDB_DATA value;
1603 bool ret = false;
1604 char *path;
1605 uint32_t buflen;
1606 const char *buf;
1607 uint32_t num_items, i;
1608 int32_t len;
1609
1610 if (key == NULL) {
1611 goto done;
1612 }
1613
1614 path = normalize_reg_path(mem_ctx, key);
1615 if (path == NULL) {
1616 DEBUG(0, ("out of memory! (talloc failed)\n"));
1617 goto done;
1618 }
1619
1620 if (*path == '\0') {
1621 goto done;
1622 }
1623
1624 value = regdb_fetch_key_internal(db, mem_ctx, path);
1625 if (value.dptr == NULL) {
1626 goto done;
1627 }
1628
1629 if (value.dsize == 0) {
1630 DEBUG(10, ("regdb_key_exists: subkeylist-record for key "
1631 "[%s] is empty: Could be a deleted record in a "
1632 "clustered (ctdb) environment?\n",
1633 path));
1634 goto done;
1635 }
1636
1637 len = tdb_unpack(value.dptr, value.dsize, "d", &num_items);
1638 if (len == (int32_t)-1) {
1639 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record for key "
1640 "[%s] is invalid: Could not parse initial 4-byte "
1641 "counter. record data length is %u.\n",
1642 path, (unsigned int)value.dsize));
1643 goto done;
1644 }
1645
1646 /*
1647 * Note: the tdb_unpack check above implies that len <= value.dsize
1648 */
1649 buflen = value.dsize - len;
1650 buf = (const char *)value.dptr + len;
1651
1652 len = 0;
1653
1654 for (i = 0; i < num_items; i++) {
1655 if (buflen == 0) {
1656 break;
1657 }
1658 len = strnlen(buf, buflen) + 1;
1659 if (buflen < len) {
1660 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record "
1661 "for key [%s] is corrupt: %u items expected, "
1662 "item number %u is not zero terminated.\n",
1663 path, num_items, i+1));
1664 goto done;
1665 }
1666
1667 buf += len;
1668 buflen -= len;
1669 }
1670
1671 if (buflen > 0) {
1672 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record for key "
1673 "[%s] is corrupt: %u items expected and found, but "
1674 "the record contains additional %u bytes\n",
1675 path, num_items, buflen));
1676 goto done;
1677 }
1678
1679 if (i < num_items) {
1680 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record for key "
1681 "[%s] is corrupt: %u items expected, but only %u "
1682 "items found.\n",
1683 path, num_items, i+1));
1684 goto done;
1685 }
1686
1687 ret = true;
1688
1689 done:
1690 TALLOC_FREE(mem_ctx);
1691 return ret;
1692 }
1693
1694
1695 /***********************************************************************
1696 Retrieve an array of strings containing subkeys. Memory should be
1697 released by the caller.
1698 ***********************************************************************/
1699
1700 static WERROR regdb_fetch_keys_internal(struct db_context *db, const char *key,
1701 struct regsubkey_ctr *ctr)
1702 {
1703 WERROR werr;
1704 uint32_t num_items;
1705 uint8 *buf;
1706 uint32 buflen, len;
1707 int i;
1708 fstring subkeyname;
1709 TALLOC_CTX *frame = talloc_stackframe();
1710 TDB_DATA value;
1711
1712 DEBUG(11,("regdb_fetch_keys: Enter key => [%s]\n", key ? key : "NULL"));
1713
1714 if (!regdb_key_exists(db, key)) {
1715 DEBUG(10, ("key [%s] not found\n", key));
1716 werr = WERR_NOT_FOUND;
1717 goto done;
1718 }
1719
1720 werr = regsubkey_ctr_reinit(ctr);
1721 W_ERROR_NOT_OK_GOTO_DONE(werr);
1722
1723 werr = regsubkey_ctr_set_seqnum(ctr, dbwrap_get_seqnum(db));
1724 W_ERROR_NOT_OK_GOTO_DONE(werr);
1725
1726 value = regdb_fetch_key_internal(db, frame, key);
1727
1728 if (value.dsize == 0 || value.dptr == NULL) {
1729 DEBUG(10, ("regdb_fetch_keys: no subkeys found for key [%s]\n",
1730 key));
1731 goto done;
1732 }
1733
1734 buf = value.dptr;
1735 buflen = value.dsize;
1736 len = tdb_unpack( buf, buflen, "d", &num_items);
1737 if (len == (uint32_t)-1) {
1738 werr = WERR_NOT_FOUND;
1739 goto done;
1740 }
1741
1742 for (i=0; i<num_items; i++) {
1743 len += tdb_unpack(buf+len, buflen-len, "f", subkeyname);
1744 werr = regsubkey_ctr_addkey(ctr, subkeyname);
1745 if (!W_ERROR_IS_OK(werr)) {
1746 DEBUG(5, ("regdb_fetch_keys: regsubkey_ctr_addkey "
1747 "failed: %s\n", win_errstr(werr)));
1748 num_items = 0;
1749 goto done;
1750 }
1751 }
1752
1753 DEBUG(11,("regdb_fetch_keys: Exit [%d] items\n", num_items));
1754
1755 done:
1756 TALLOC_FREE(frame);
1757 return werr;
1758 }
1759
1760 static int regdb_fetch_keys(const char *key, struct regsubkey_ctr *ctr)
1761 {
1762 WERROR werr;
1763
1764 werr = regdb_fetch_keys_internal(regdb, key, ctr);
1765 if (!W_ERROR_IS_OK(werr)) {
1766 return -1;
1767 }
1768
1769 return regsubkey_ctr_numkeys(ctr);
1770 }
1771
1772 /****************************************************************************
1773 Unpack a list of registry values frem the TDB
1774 ***************************************************************************/
1775
1776 static int regdb_unpack_values(struct regval_ctr *values, uint8 *buf, int buflen)
1777 {
1778 int len = 0;
1779 uint32 type;
1780 fstring valuename;
1781 uint32 size;
1782 uint8 *data_p;
1783 uint32 num_values = 0;
1784 int i;
1785
1786 /* loop and unpack the rest of the registry values */
1787
1788 len += tdb_unpack(buf+len, buflen-len, "d", &num_values);
1789
1790 for ( i=0; i<num_values; i++ ) {
1791 /* unpack the next regval */
1792
1793 type = REG_NONE;
1794 size = 0;
1795 data_p = NULL;
1796 valuename[0] = '\0';
1797 len += tdb_unpack(buf+len, buflen-len, "fdB",
1798 valuename,
1799 &type,
1800 &size,
1801 &data_p);
1802
1803 regval_ctr_addvalue(values, valuename, type,
1804 (uint8_t *)data_p, size);
1805 SAFE_FREE(data_p); /* 'B' option to tdb_unpack does a malloc() */
1806
1807 DEBUG(10, ("regdb_unpack_values: value[%d]: name[%s] len[%d]\n",
1808 i, valuename, size));
1809 }
1810
1811 return len;
1812 }
1813
1814 /****************************************************************************
1815 Pack all values in all printer keys
1816 ***************************************************************************/
1817
1818 static int regdb_pack_values(struct regval_ctr *values, uint8 *buf, int buflen)
1819 {
1820 int len = 0;
1821 int i;
1822 struct regval_blob *val;
1823 int num_values;
1824
1825 if ( !values )
1826 return 0;
1827
1828 num_values = regval_ctr_numvals( values );
1829
1830 /* pack the number of values first */
1831
1832 len += tdb_pack( buf+len, buflen-len, "d", num_values );
1833
1834 /* loop over all values */
1835
1836 for ( i=0; i<num_values; i++ ) {
1837 val = regval_ctr_specific_value( values, i );
1838 len += tdb_pack(buf+len, buflen-len, "fdB",
1839 regval_name(val),
1840 regval_type(val),
1841 regval_size(val),
1842 regval_data_p(val) );
1843 }
1844
1845 return len;
1846 }
1847
1848 /***********************************************************************
1849 Retrieve an array of strings containing subkeys. Memory should be
1850 released by the caller.
1851 ***********************************************************************/
1852
1853 static int regdb_fetch_values_internal(struct db_context *db, const char* key,
1854 struct regval_ctr *values)
1855 {
1856 char *keystr = NULL;
1857 TALLOC_CTX *ctx = talloc_stackframe();
1858 int ret = 0;
1859 TDB_DATA value;
1860 WERROR werr;
1861
1862 DEBUG(10,("regdb_fetch_values: Looking for values of key [%s]\n", key));
1863
1864 if (!regdb_key_exists(db, key)) {
1865 goto done;
1866 }
1867
1868 keystr = talloc_asprintf(ctx, "%s\\%s", REG_VALUE_PREFIX, key);
1869 if (!keystr) {
1870 goto done;
1871 }
1872
1873 werr = regval_ctr_set_seqnum(values, dbwrap_get_seqnum(db));
1874 W_ERROR_NOT_OK_GOTO_DONE(werr);
1875
1876 value = regdb_fetch_key_internal(db, ctx, keystr);
1877
1878 if (!value.dptr) {
1879 /* all keys have zero values by default */
1880 goto done;
1881 }
1882
1883 regdb_unpack_values(values, value.dptr, value.dsize);
1884 ret = regval_ctr_numvals(values);
1885
1886 done:
1887 TALLOC_FREE(ctx);
1888 return ret;
1889 }
1890
1891 static int regdb_fetch_values(const char* key, struct regval_ctr *values)
1892 {
1893 return regdb_fetch_values_internal(regdb, key, values);
1894 }
1895
1896 static NTSTATUS regdb_store_values_internal(struct db_context *db,
1897 const char *key,
1898 struct regval_ctr *values)
1899 {
1900 TDB_DATA old_data, data;
1901 char *keystr = NULL;
1902 TALLOC_CTX *ctx = talloc_stackframe();
1903 int len;
1904 NTSTATUS status;
1905
1906 DEBUG(10,("regdb_store_values: Looking for values of key [%s]\n", key));
1907
1908 if (!regdb_key_exists(db, key)) {
1909 status = NT_STATUS_NOT_FOUND;
1910 goto done;
1911 }
1912
1913 if (regval_ctr_numvals(values) == 0) {
1914 WERROR werr = regdb_delete_values(db, key);
1915 return werror_to_ntstatus(werr);
1916 }
1917
1918 ZERO_STRUCT(data);
1919
1920 len = regdb_pack_values(values, data.dptr, data.dsize);
1921 if (len <= 0) {
1922 DEBUG(0,("regdb_store_values: unable to pack values. len <= 0\n"));
1923 status = NT_STATUS_UNSUCCESSFUL;
1924 goto done;
1925 }
1926
1927 data.dptr = talloc_array(ctx, uint8, len);
1928 data.dsize = len;
1929
1930 len = regdb_pack_values(values, data.dptr, data.dsize);
1931
1932 SMB_ASSERT( len == data.dsize );
1933
1934 keystr = talloc_asprintf(ctx, "%s\\%s", REG_VALUE_PREFIX, key );
1935 if (!keystr) {
1936 status = NT_STATUS_NO_MEMORY;
1937 goto done;
1938 }
1939 keystr = normalize_reg_path(ctx, keystr);
1940 if (!keystr) {
1941 status = NT_STATUS_NO_MEMORY;
1942 goto done;
1943 }
1944
1945 status = dbwrap_fetch_bystring(db, ctx, keystr, &old_data);
1946
1947 if (NT_STATUS_IS_OK(status)
1948 && (old_data.dptr != NULL)
1949 && (old_data.dsize == data.dsize)
1950 && (memcmp(old_data.dptr, data.dptr, data.dsize) == 0))
1951 {
1952 status = NT_STATUS_OK;
1953 goto done;
1954 }
1955
1956 status = dbwrap_trans_store_bystring(db, keystr, data, TDB_REPLACE);
1957
1958 done:
1959 TALLOC_FREE(ctx);
1960 return status;
1961 }
1962
1963 struct regdb_store_values_ctx {
1964 const char *key;
1965 struct regval_ctr *values;
1966 };
1967
1968 static NTSTATUS regdb_store_values_action(struct db_context *db,
1969 void *private_data)
1970 {
1971 NTSTATUS status;
1972 struct regdb_store_values_ctx *ctx =
1973 (struct regdb_store_values_ctx *)private_data;
1974
1975 status = regdb_store_values_internal(db, ctx->key, ctx->values);
1976
1977 return status;
1978 }
1979
1980 static bool regdb_store_values(const char *key, struct regval_ctr *values)
1981 {
1982 WERROR werr;
1983 struct regdb_store_values_ctx ctx;
1984
1985 ctx.key = key;
1986 ctx.values = values;
1987
1988 werr = regdb_trans_do(regdb, regdb_store_values_action, &ctx);
1989
1990 return W_ERROR_IS_OK(werr);
1991 }
1992
1993 static WERROR regdb_get_secdesc(TALLOC_CTX *mem_ctx, const char *key,
1994 struct security_descriptor **psecdesc)
1995 {
1996 char *tdbkey;
1997 TDB_DATA data;
1998 NTSTATUS status;
1999 TALLOC_CTX *tmp_ctx = talloc_stackframe();
2000 WERROR err = WERR_OK;
2001
2002 DEBUG(10, ("regdb_get_secdesc: Getting secdesc of key [%s]\n", key));
2003
2004 if (!regdb_key_exists(regdb, key)) {
2005 err = WERR_BADFILE;
2006 goto done;
2007 }
2008
2009 tdbkey = talloc_asprintf(tmp_ctx, "%s\\%s", REG_SECDESC_PREFIX, key);
2010 if (tdbkey == NULL) {
2011 err = WERR_NOMEM;
2012 goto done;
2013 }
2014
2015 tdbkey = normalize_reg_path(tmp_ctx, tdbkey);
2016 if (tdbkey == NULL) {
2017 err = WERR_NOMEM;
2018 goto done;
2019 }
2020
2021 status = dbwrap_fetch_bystring(regdb, tmp_ctx, tdbkey, &data);
2022 if (!NT_STATUS_IS_OK(status)) {
2023 err = WERR_BADFILE;
2024 goto done;
2025 }
2026
2027 status = unmarshall_sec_desc(mem_ctx, (uint8 *)data.dptr, data.dsize,
2028 psecdesc);
2029
2030 if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
2031 err = WERR_NOMEM;
2032 } else if (!NT_STATUS_IS_OK(status)) {
2033 err = WERR_REG_CORRUPT;
2034 }
2035
2036 done:
2037 TALLOC_FREE(tmp_ctx);
2038 return err;
2039 }
2040
2041 struct regdb_set_secdesc_ctx {
2042 const char *key;
2043 struct security_descriptor *secdesc;
2044 };
2045
2046 static NTSTATUS regdb_set_secdesc_action(struct db_context *db,
2047 void *private_data)
2048 {
2049 char *tdbkey;
2050 NTSTATUS status;
2051 TDB_DATA tdbdata;
2052 struct regdb_set_secdesc_ctx *ctx =
2053 (struct regdb_set_secdesc_ctx *)private_data;
2054 TALLOC_CTX *frame = talloc_stackframe();
2055
2056 tdbkey = talloc_asprintf(frame, "%s\\%s", REG_SECDESC_PREFIX, ctx->key);
2057 if (tdbkey == NULL) {
2058 status = NT_STATUS_NO_MEMORY;
2059 goto done;
2060 }
2061
2062 tdbkey = normalize_reg_path(frame, tdbkey);
2063 if (tdbkey == NULL) {
2064 status = NT_STATUS_NO_MEMORY;
2065 goto done;
2066 }
2067
2068 if (ctx->secdesc == NULL) {
2069 /* assuming a delete */
2070 status = dbwrap_delete_bystring(db, tdbkey);
2071 goto done;
2072 }
2073
2074 status = marshall_sec_desc(frame, ctx->secdesc, &tdbdata.dptr,
2075 &tdbdata.dsize);
2076 if (!NT_STATUS_IS_OK(status)) {
2077 goto done;
2078 }
2079
2080 status = dbwrap_store_bystring(db, tdbkey, tdbdata, 0);
2081
2082 done:
2083 TALLOC_FREE(frame);
2084 return status;
2085 }
2086
2087 static WERROR regdb_set_secdesc(const char *key,
2088 struct security_descriptor *secdesc)
2089 {
2090 WERROR err;
2091 struct regdb_set_secdesc_ctx ctx;
2092
2093 if (!regdb_key_exists(regdb, key)) {
2094 err = WERR_BADFILE;
2095 goto done;
2096 }
2097
2098 ctx.key = key;
2099 ctx.secdesc = secdesc;
2100
2101 err = regdb_trans_do(regdb, regdb_set_secdesc_action, &ctx);
2102
2103 done:
2104 return err;
2105 }
2106
2107 static bool regdb_subkeys_need_update(struct regsubkey_ctr *subkeys)
2108 {
2109 return (regdb_get_seqnum() != regsubkey_ctr_get_seqnum(subkeys));
2110 }
2111
2112 static bool regdb_values_need_update(struct regval_ctr *values)
2113 {
2114 return (regdb_get_seqnum() != regval_ctr_get_seqnum(values));
2115 }
2116
2117 /*
2118 * Table of function pointers for default access
2119 */
2120
2121 struct registry_ops regdb_ops = {
2122 .fetch_subkeys = regdb_fetch_keys,
2123 .fetch_values = regdb_fetch_values,
2124 .store_subkeys = regdb_store_keys,
2125 .store_values = regdb_store_values,
2126 .create_subkey = regdb_create_subkey,
2127 .delete_subkey = regdb_delete_subkey,
2128 .get_secdesc = regdb_get_secdesc,
2129 .set_secdesc = regdb_set_secdesc,
2130 .subkeys_need_update = regdb_subkeys_need_update,
2131 .values_need_update = regdb_values_need_update
2132 };
reg import