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lib/util: consolidate module loading into common code
[Samba/gebeck_regimport.git] / source3 / registry / reg_backend_db.c
blobe22a73ad05779d1f979829b9db5108f8f46df427
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 version_id = dbwrap_fetch_int32(db, REGDB_VERSION_KEYNAME);
75
76 if (version_id != REGDB_CODE_VERSION) {
77 DEBUG(0, ("ERROR: changed registry version %d found while "
78 "trying to write to the registry. Version %d "
79 "expected. Denying access.\n",
80 version_id, REGDB_CODE_VERSION));
81 return NT_STATUS_ACCESS_DENIED;
82 }
83
84 status = ctx->action(db, ctx->private_data);
85 return status;
86 }
87
88 static WERROR regdb_trans_do(struct db_context *db,
89 NTSTATUS (*action)(struct db_context *, void *),
90 void *private_data)
91 {
92 NTSTATUS status;
93 struct regdb_trans_ctx ctx;
94
95
96 ctx.action = action;
97 ctx.private_data = private_data;
98
99 status = dbwrap_trans_do(db, regdb_trans_do_action, &ctx);
100
101 return ntstatus_to_werror(status);
102 }
103
104 /* List the deepest path into the registry. All part components will be created.*/
105
106 /* If you want to have a part of the path controlled by the tdb and part by
107 a virtual registry db (e.g. printing), then you have to list the deepest path.
108 For example,"HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion/Print"
109 allows the reg_db backend to handle everything up to
110 "HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion" and then we'll hook
111 the reg_printing backend onto the last component of the path (see
112 KEY_PRINTING_2K in include/rpc_reg.h) --jerry */
113
114 static const char *builtin_registry_paths[] = {
115 KEY_PRINTING_2K,
116 KEY_PRINTING_PORTS,
117 KEY_PRINTING,
118 KEY_PRINTING "\\Forms",
119 KEY_PRINTING "\\Printers",
120 KEY_PRINTING "\\Environments\\Windows NT x86\\Print Processors\\winprint",
121 KEY_SHARES,
122 KEY_EVENTLOG,
123 KEY_SMBCONF,
124 KEY_PERFLIB,
125 KEY_PERFLIB_009,
126 KEY_GROUP_POLICY,
127 KEY_SAMBA_GROUP_POLICY,
128 KEY_GP_MACHINE_POLICY,
129 KEY_GP_MACHINE_WIN_POLICY,
130 KEY_HKCU,
131 KEY_GP_USER_POLICY,
132 KEY_GP_USER_WIN_POLICY,
133 "HKLM\\Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\GPExtensions",
134 "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Print\\Monitors",
135 KEY_PROD_OPTIONS,
136 "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Terminal Server\\DefaultUserConfiguration",
137 KEY_TCPIP_PARAMS,
138 KEY_NETLOGON_PARAMS,
139 KEY_HKU,
140 KEY_HKCR,
141 KEY_HKPD,
142 KEY_HKPT,
143 NULL };
144
145 struct builtin_regkey_value {
146 const char *path;
147 const char *valuename;
148 uint32 type;
149 union {
150 const char *string;
151 uint32 dw_value;
152 } data;
153 };
154
155 static struct builtin_regkey_value builtin_registry_values[] = {
156 { KEY_PRINTING_PORTS,
157 SAMBA_PRINTER_PORT_NAME, REG_SZ, { "" } },
158 { KEY_PRINTING_2K,
159 "DefaultSpoolDirectory", REG_SZ, { "C:\\Windows\\System32\\Spool\\Printers" } },
160 { KEY_EVENTLOG,
161 "DisplayName", REG_SZ, { "Event Log" } },
162 { KEY_EVENTLOG,
163 "ErrorControl", REG_DWORD, { (char*)0x00000001 } },
164 { NULL, NULL, 0, { NULL } }
165 };
166
167 static WERROR create_key_recursive(struct db_context *db,
168 char *path,
169 const char *subkey)
170 {
171 WERROR werr;
172 char *p;
173
174 if (subkey == NULL) {
175 return WERR_INVALID_PARAM;
176 }
177
178 if (path == NULL) {
179 return regdb_create_basekey(db, subkey);
180 }
181
182 p = strrchr_m(path, '\\');
183
184 if (p == NULL) {
185 werr = create_key_recursive(db, NULL, path);
186 } else {
187 *p = '\0';
188 werr = create_key_recursive(db, path, p+1);
189 *p = '\\';
190 }
191
192 if (!W_ERROR_IS_OK(werr)) {
193 goto done;
194 }
195
196 werr = regdb_create_subkey_internal(db, path, subkey);
197
198 done:
199 return werr;
200 }
201
202 /**
203 * Initialize a key in the registry:
204 * create each component key of the specified path.
205 */
206 static WERROR init_registry_key_internal(struct db_context *db,
207 const char *add_path)
208 {
209 char *subkey, *key;
210 WERROR werr;
211 TALLOC_CTX *frame = talloc_stackframe();
212
213 if (add_path == NULL) {
214 werr = WERR_INVALID_PARAM;
215 goto done;
216 }
217
218 key = talloc_strdup(frame, add_path);
219
220 subkey = strrchr_m(key, '\\');
221 if (subkey == NULL) {
222 subkey = key;
223 key = NULL;
224 } else {
225 *subkey = '\0';
226 subkey++;
227 }
228
229 werr = create_key_recursive(db, key, subkey);
230
231 done:
232 talloc_free(frame);
233 return werr;
234 }
235
236 struct init_registry_key_context {
237 const char *add_path;
238 };
239
240 static NTSTATUS init_registry_key_action(struct db_context *db,
241 void *private_data)
242 {
243 struct init_registry_key_context *init_ctx =
244 (struct init_registry_key_context *)private_data;
245
246 return werror_to_ntstatus(init_registry_key_internal(
247 db, init_ctx->add_path));
248 }
249
250 /**
251 * Initialize a key in the registry:
252 * create each component key of the specified path,
253 * wrapped in one db transaction.
254 */
255 WERROR init_registry_key(const char *add_path)
256 {
257 struct init_registry_key_context init_ctx;
258
259 if (regdb_key_exists(regdb, add_path)) {
260 return WERR_OK;
261 }
262
263 init_ctx.add_path = add_path;
264
265 return regdb_trans_do(regdb,
266 init_registry_key_action,
267 &init_ctx);
268 }
269
270 /***********************************************************************
271 Open the registry data in the tdb
272 ***********************************************************************/
273
274 static void regdb_ctr_add_value(struct regval_ctr *ctr,
275 struct builtin_regkey_value *value)
276 {
277 switch(value->type) {
278 case REG_DWORD:
279 regval_ctr_addvalue(ctr, value->valuename, REG_DWORD,
280 (uint8_t *)&value->data.dw_value,
281 sizeof(uint32));
282 break;
283
284 case REG_SZ:
285 regval_ctr_addvalue_sz(ctr, value->valuename,
286 value->data.string);
287 break;
288
289 default:
290 DEBUG(0, ("regdb_ctr_add_value: invalid value type in "
291 "registry values [%d]\n", value->type));
292 }
293 }
294
295 static NTSTATUS init_registry_data_action(struct db_context *db,
296 void *private_data)
297 {
298 NTSTATUS status;
299 TALLOC_CTX *frame = talloc_stackframe();
300 struct regval_ctr *values;
301 int i;
302
303 /* loop over all of the predefined paths and add each component */
304
305 for (i=0; builtin_registry_paths[i] != NULL; i++) {
306 if (regdb_key_exists(db, builtin_registry_paths[i])) {
307 continue;
308 }
309 status = werror_to_ntstatus(init_registry_key_internal(db,
310 builtin_registry_paths[i]));
311 if (!NT_STATUS_IS_OK(status)) {
312 goto done;
313 }
314 }
315
316 /* loop over all of the predefined values and add each component */
317
318 for (i=0; builtin_registry_values[i].path != NULL; i++) {
319 WERROR werr;
320
321 werr = regval_ctr_init(frame, &values);
322 if (!W_ERROR_IS_OK(werr)) {
323 status = werror_to_ntstatus(werr);
324 goto done;
325 }
326
327 regdb_fetch_values_internal(db,
328 builtin_registry_values[i].path,
329 values);
330
331 /* preserve existing values across restarts. Only add new ones */
332
333 if (!regval_ctr_key_exists(values,
334 builtin_registry_values[i].valuename))
335 {
336 regdb_ctr_add_value(values,
337 &builtin_registry_values[i]);
338 status = regdb_store_values_internal(db,
339 builtin_registry_values[i].path,
340 values);
341 if (!NT_STATUS_IS_OK(status)) {
342 goto done;
343 }
344 }
345 TALLOC_FREE(values);
346 }
347
348 status = NT_STATUS_OK;
349
350 done:
351
352 TALLOC_FREE(frame);
353 return status;
354 }
355
356 WERROR init_registry_data(void)
357 {
358 WERROR werr;
359 TALLOC_CTX *frame = talloc_stackframe();
360 struct regval_ctr *values;
361 int i;
362
363 /*
364 * First, check for the existence of the needed keys and values.
365 * If all do already exist, we can save the writes.
366 */
367 for (i=0; builtin_registry_paths[i] != NULL; i++) {
368 if (!regdb_key_exists(regdb, builtin_registry_paths[i])) {
369 goto do_init;
370 }
371 }
372
373 for (i=0; builtin_registry_values[i].path != NULL; i++) {
374 werr = regval_ctr_init(frame, &values);
375 W_ERROR_NOT_OK_GOTO_DONE(werr);
376
377 regdb_fetch_values_internal(regdb,
378 builtin_registry_values[i].path,
379 values);
380 if (!regval_ctr_key_exists(values,
381 builtin_registry_values[i].valuename))
382 {
383 TALLOC_FREE(values);
384 goto do_init;
385 }
386
387 TALLOC_FREE(values);
388 }
389
390 werr = WERR_OK;
391 goto done;
392
393 do_init:
394
395 /*
396 * There are potentially quite a few store operations which are all
397 * indiviually wrapped in tdb transactions. Wrapping them in a single
398 * transaction gives just a single transaction_commit() to actually do
399 * its fsync()s. See tdb/common/transaction.c for info about nested
400 * transaction behaviour.
401 */
402
403 werr = regdb_trans_do(regdb,
404 init_registry_data_action,
405 NULL);
406
407 done:
408 TALLOC_FREE(frame);
409 return werr;
410 }
411
412 static int regdb_normalize_keynames_fn(struct db_record *rec,
413 void *private_data)
414 {
415 TALLOC_CTX *mem_ctx = talloc_tos();
416 const char *keyname;
417 NTSTATUS status;
418 struct db_context *db = (struct db_context *)private_data;
419
420 if (rec->key.dptr == NULL || rec->key.dsize == 0) {
421 return 0;
422 }
423
424 if (db == NULL) {
425 DEBUG(0, ("regdb_normalize_keynames_fn: ERROR: "
426 "NULL db context handed in via private_data\n"));
427 return 1;
428 }
429
430 if (strncmp((const char *)rec->key.dptr, REGDB_VERSION_KEYNAME,
431 strlen(REGDB_VERSION_KEYNAME)) == 0)
432 {
433 return 0;
434 }
435
436 keyname = strchr((const char *) rec->key.dptr, '/');
437 if (keyname) {
438 keyname = talloc_string_sub(mem_ctx,
439 (const char *) rec->key.dptr,
440 "/",
441 "\\");
442
443 DEBUG(2, ("regdb_normalize_keynames_fn: Convert %s to %s\n",
444 (const char *) rec->key.dptr,
445 keyname));
446
447 /* Delete the original record and store the normalized key */
448 status = rec->delete_rec(rec);
449 if (!NT_STATUS_IS_OK(status)) {
450 DEBUG(0,("regdb_normalize_keynames_fn: "
451 "tdb_delete for [%s] failed!\n",
452 rec->key.dptr));
453 return 1;
454 }
455
456 status = dbwrap_store_bystring(db, keyname, rec->value,
457 TDB_REPLACE);
458 if (!NT_STATUS_IS_OK(status)) {
459 DEBUG(0,("regdb_normalize_keynames_fn: "
460 "failed to store new record for [%s]!\n",
461 keyname));
462 return 1;
463 }
464 }
465
466 return 0;
467 }
468
469 static WERROR regdb_store_regdb_version(struct db_context *db, uint32_t version)
470 {
471 NTSTATUS status;
472 if (db == NULL) {
473 return WERR_CAN_NOT_COMPLETE;
474 }
475
476 status = dbwrap_trans_store_int32(db, REGDB_VERSION_KEYNAME, version);
477 if (!NT_STATUS_IS_OK(status)) {
478 DEBUG(1, ("regdb_store_regdb_version: error storing %s = %d: %s\n",
479 REGDB_VERSION_KEYNAME, version, nt_errstr(status)));
480 return ntstatus_to_werror(status);
481 } else {
482 DEBUG(10, ("regdb_store_regdb_version: stored %s = %d\n",
483 REGDB_VERSION_KEYNAME, version));
484 return WERR_OK;
485 }
486 }
487
488 static WERROR regdb_upgrade_v1_to_v2(struct db_context *db)
489 {
490 TALLOC_CTX *mem_ctx;
491 int rc;
492 WERROR werr;
493
494 mem_ctx = talloc_stackframe();
495
496 rc = db->traverse(db, regdb_normalize_keynames_fn, db);
497
498 talloc_free(mem_ctx);
499
500 if (rc < 0) {
501 return WERR_REG_IO_FAILURE;
502 }
503
504 werr = regdb_store_regdb_version(db, REGDB_VERSION_V2);
505 return werr;
506 }
507
508 static int regdb_upgrade_v2_to_v3_fn(struct db_record *rec, void *private_data)
509 {
510 const char *keyname;
511 fstring subkeyname;
512 NTSTATUS status;
513 WERROR werr;
514 uint8_t *buf;
515 uint32_t buflen, len;
516 uint32_t num_items;
517 uint32_t i;
518 struct db_context *db = (struct db_context *)private_data;
519
520 if (rec->key.dptr == NULL || rec->key.dsize == 0) {
521 return 0;
522 }
523
524 if (db == NULL) {
525 DEBUG(0, ("regdb_upgrade_v2_to_v3_fn: ERROR: "
526 "NULL db context handed in via private_data\n"));
527 return 1;
528 }
529
530 keyname = (const char *)rec->key.dptr;
531
532 if (strncmp(keyname, REGDB_VERSION_KEYNAME,
533 strlen(REGDB_VERSION_KEYNAME)) == 0)
534 {
535 return 0;
536 }
537
538 if (strncmp(keyname, REG_SORTED_SUBKEYS_PREFIX,
539 strlen(REG_SORTED_SUBKEYS_PREFIX)) == 0)
540 {
541 /* Delete the deprecated sorted subkeys cache. */
542
543 DEBUG(10, ("regdb_upgrade_v2_to_v3: deleting [%s]\n", keyname));
544
545 status = rec->delete_rec(rec);
546 if (!NT_STATUS_IS_OK(status)) {
547 DEBUG(0, ("regdb_upgrade_v2_to_v3: tdb_delete for [%s] "
548 "failed!\n", keyname));
549 return 1;
550 }
551
552 return 0;
553 }
554
555 if (strncmp(keyname, REG_VALUE_PREFIX, strlen(REG_VALUE_PREFIX)) == 0) {
556 DEBUG(10, ("regdb_upgrade_v2_to_v3: skipping [%s]\n", keyname));
557 return 0;
558 }
559
560 if (strncmp(keyname, REG_SECDESC_PREFIX,
561 strlen(REG_SECDESC_PREFIX)) == 0)
562 {
563 DEBUG(10, ("regdb_upgrade_v2_to_v3: skipping [%s]\n", keyname));
564 return 0;
565 }
566
567 /*
568 * Found a regular subkey list record.
569 * Walk the list and create the list record for those
570 * subkeys that don't already have one.
571 */
572 DEBUG(10, ("regdb_upgrade_v2_to_v3: scanning subkey list of [%s]\n",
573 keyname));
574
575 buf = rec->value.dptr;
576 buflen = rec->value.dsize;
577
578 len = tdb_unpack(buf, buflen, "d", &num_items);
579 if (len == (uint32_t)-1) {
580 /* invalid or empty - skip */
581 return 0;
582 }
583
584 for (i=0; i<num_items; i++) {
585 len += tdb_unpack(buf+len, buflen-len, "f", subkeyname);
586 DEBUG(10, ("regdb_upgrade_v2_to_v3: "
587 "writing subkey list for [%s\\%s]\n",
588 keyname, subkeyname));
589 werr = regdb_store_subkey_list(db, keyname, subkeyname);
590 if (!W_ERROR_IS_OK(werr)) {
591 return 1;
592 }
593 }
594
595 return 0;
596 }
597
598 static WERROR regdb_upgrade_v2_to_v3(struct db_context *db)
599 {
600 int rc;
601 WERROR werr;
602
603 rc = regdb->traverse(db, regdb_upgrade_v2_to_v3_fn, db);
604 if (rc < 0) {
605 werr = WERR_REG_IO_FAILURE;
606 goto done;
607 }
608
609 werr = regdb_store_regdb_version(db, REGDB_VERSION_V3);
610
611 done:
612 return werr;
613 }
614
615 /***********************************************************************
616 Open the registry database
617 ***********************************************************************/
618
619 WERROR regdb_init(void)
620 {
621 uint32 vers_id;
622 WERROR werr;
623
624 if (regdb) {
625 DEBUG(10, ("regdb_init: incrementing refcount (%d->%d)\n",
626 regdb_refcount, regdb_refcount+1));
627 regdb_refcount++;
628 return WERR_OK;
629 }
630
631 regdb = db_open(NULL, state_path("registry.tdb"), 0,
632 REG_TDB_FLAGS, O_RDWR, 0600);
633 if (!regdb) {
634 regdb = db_open(NULL, state_path("registry.tdb"), 0,
635 REG_TDB_FLAGS, O_RDWR|O_CREAT, 0600);
636 if (!regdb) {
637 werr = ntstatus_to_werror(map_nt_error_from_unix(errno));
638 DEBUG(1,("regdb_init: Failed to open registry %s (%s)\n",
639 state_path("registry.tdb"), strerror(errno) ));
640 return werr;
641 }
642
643 DEBUG(10,("regdb_init: Successfully created registry tdb\n"));
644 }
645
646 regdb_refcount = 1;
647 DEBUG(10, ("regdb_init: registry db openend. refcount reset (%d)\n",
648 regdb_refcount));
649
650 vers_id = dbwrap_fetch_int32(regdb, REGDB_VERSION_KEYNAME);
651 if (vers_id == -1) {
652 DEBUG(10, ("regdb_init: registry version uninitialized "
653 "(got %d), initializing to version %d\n",
654 vers_id, REGDB_CODE_VERSION));
655
656 werr = regdb_store_regdb_version(regdb, REGDB_CODE_VERSION);
657 return werr;
658 }
659
660 if (vers_id > REGDB_CODE_VERSION || vers_id == 0) {
661 DEBUG(0, ("regdb_init: unknown registry version %d "
662 "(code version = %d), refusing initialization\n",
663 vers_id, REGDB_CODE_VERSION));
664 return WERR_CAN_NOT_COMPLETE;
665 }
666
667 if (regdb->transaction_start(regdb) != 0) {
668 return WERR_REG_IO_FAILURE;
669 }
670
671 if (vers_id == REGDB_VERSION_V1) {
672 DEBUG(10, ("regdb_init: upgrading registry from version %d "
673 "to %d\n", REGDB_VERSION_V1, REGDB_VERSION_V2));
674
675 werr = regdb_upgrade_v1_to_v2(regdb);
676 if (!W_ERROR_IS_OK(werr)) {
677 regdb->transaction_cancel(regdb);
678 return werr;
679 }
680
681 vers_id = REGDB_VERSION_V2;
682 }
683
684 if (vers_id == REGDB_VERSION_V2) {
685 DEBUG(10, ("regdb_init: upgrading registry from version %d "
686 "to %d\n", REGDB_VERSION_V2, REGDB_VERSION_V3));
687
688 werr = regdb_upgrade_v2_to_v3(regdb);
689 if (!W_ERROR_IS_OK(werr)) {
690 regdb->transaction_cancel(regdb);
691 return werr;
692 }
693
694 vers_id = REGDB_VERSION_V3;
695 }
696
697 /* future upgrade code should go here */
698
699 if (regdb->transaction_commit(regdb) != 0) {
700 return WERR_REG_IO_FAILURE;
701 }
702
703 return WERR_OK;
704 }
705
706 /***********************************************************************
707 Open the registry. Must already have been initialized by regdb_init()
708 ***********************************************************************/
709
710 WERROR regdb_open( void )
711 {
712 WERROR result = WERR_OK;
713
714 if ( regdb ) {
715 DEBUG(10, ("regdb_open: incrementing refcount (%d->%d)\n",
716 regdb_refcount, regdb_refcount+1));
717 regdb_refcount++;
718 return WERR_OK;
719 }
720
721 become_root();
722
723 regdb = db_open(NULL, state_path("registry.tdb"), 0,
724 REG_TDB_FLAGS, O_RDWR, 0600);
725 if ( !regdb ) {
726 result = ntstatus_to_werror( map_nt_error_from_unix( errno ) );
727 DEBUG(0,("regdb_open: Failed to open %s! (%s)\n",
728 state_path("registry.tdb"), strerror(errno) ));
729 }
730
731 unbecome_root();
732
733 regdb_refcount = 1;
734 DEBUG(10, ("regdb_open: registry db opened. refcount reset (%d)\n",
735 regdb_refcount));
736
737 return result;
738 }
739
740 /***********************************************************************
741 ***********************************************************************/
742
743 int regdb_close( void )
744 {
745 if (regdb_refcount == 0) {
746 return 0;
747 }
748
749 regdb_refcount--;
750
751 DEBUG(10, ("regdb_close: decrementing refcount (%d->%d)\n",
752 regdb_refcount+1, regdb_refcount));
753
754 if ( regdb_refcount > 0 )
755 return 0;
756
757 SMB_ASSERT( regdb_refcount >= 0 );
758
759 TALLOC_FREE(regdb);
760 return 0;
761 }
762
763 WERROR regdb_transaction_start(void)
764 {
765 return (regdb->transaction_start(regdb) == 0) ?
766 WERR_OK : WERR_REG_IO_FAILURE;
767 }
768
769 WERROR regdb_transaction_commit(void)
770 {
771 return (regdb->transaction_commit(regdb) == 0) ?
772 WERR_OK : WERR_REG_IO_FAILURE;
773 }
774
775 WERROR regdb_transaction_cancel(void)
776 {
777 return (regdb->transaction_cancel(regdb) == 0) ?
778 WERR_OK : WERR_REG_IO_FAILURE;
779 }
780
781 /***********************************************************************
782 return the tdb sequence number of the registry tdb.
783 this is an indicator for the content of the registry
784 having changed. it will change upon regdb_init, too, though.
785 ***********************************************************************/
786 int regdb_get_seqnum(void)
787 {
788 return regdb->get_seqnum(regdb);
789 }
790
791
792 static WERROR regdb_delete_key_with_prefix(struct db_context *db,
793 const char *keyname,
794 const char *prefix)
795 {
796 char *path;
797 WERROR werr = WERR_NOMEM;
798 TALLOC_CTX *mem_ctx = talloc_stackframe();
799
800 if (keyname == NULL) {
801 werr = WERR_INVALID_PARAM;
802 goto done;
803 }
804
805 if (prefix == NULL) {
806 path = discard_const_p(char, keyname);
807 } else {
808 path = talloc_asprintf(mem_ctx, "%s\\%s", prefix, keyname);
809 if (path == NULL) {
810 goto done;
811 }
812 }
813
814 path = normalize_reg_path(mem_ctx, path);
815 if (path == NULL) {
816 goto done;
817 }
818
819 werr = ntstatus_to_werror(dbwrap_delete_bystring(db, path));
820
821 /* treat "not found" as ok */
822 if (W_ERROR_EQUAL(werr, WERR_NOT_FOUND)) {
823 werr = WERR_OK;
824 }
825
826 done:
827 talloc_free(mem_ctx);
828 return werr;
829 }
830
831
832 static WERROR regdb_delete_values(struct db_context *db, const char *keyname)
833 {
834 return regdb_delete_key_with_prefix(db, keyname, REG_VALUE_PREFIX);
835 }
836
837 static WERROR regdb_delete_secdesc(struct db_context *db, const char *keyname)
838 {
839 return regdb_delete_key_with_prefix(db, keyname, REG_SECDESC_PREFIX);
840 }
841
842 static WERROR regdb_delete_subkeylist(struct db_context *db, const char *keyname)
843 {
844 return regdb_delete_key_with_prefix(db, keyname, NULL);
845 }
846
847
848 static WERROR regdb_delete_key_lists(struct db_context *db, const char *keyname)
849 {
850 WERROR werr;
851
852 werr = regdb_delete_values(db, keyname);
853 if (!W_ERROR_IS_OK(werr)) {
854 DEBUG(1, (__location__ " Deleting %s\\%s failed: %s\n",
855 REG_VALUE_PREFIX, keyname, win_errstr(werr)));
856 goto done;
857 }
858
859 werr = regdb_delete_secdesc(db, keyname);
860 if (!W_ERROR_IS_OK(werr)) {
861 DEBUG(1, (__location__ " Deleting %s\\%s failed: %s\n",
862 REG_SECDESC_PREFIX, keyname, win_errstr(werr)));
863 goto done;
864 }
865
866 werr = regdb_delete_subkeylist(db, keyname);
867 if (!W_ERROR_IS_OK(werr)) {
868 DEBUG(1, (__location__ " Deleting %s failed: %s\n",
869 keyname, win_errstr(werr)));
870 goto done;
871 }
872
873 done:
874 return werr;
875 }
876
877 /***********************************************************************
878 Add subkey strings to the registry tdb under a defined key
879 fmt is the same format as tdb_pack except this function only supports
880 fstrings
881 ***********************************************************************/
882
883 static WERROR regdb_store_keys_internal2(struct db_context *db,
884 const char *key,
885 struct regsubkey_ctr *ctr)
886 {
887 TDB_DATA dbuf;
888 uint8 *buffer = NULL;
889 int i = 0;
890 uint32 len, buflen;
891 uint32 num_subkeys = regsubkey_ctr_numkeys(ctr);
892 char *keyname = NULL;
893 TALLOC_CTX *ctx = talloc_stackframe();
894 WERROR werr;
895
896 if (!key) {
897 werr = WERR_INVALID_PARAM;
898 goto done;
899 }
900
901 keyname = talloc_strdup(ctx, key);
902 if (!keyname) {
903 werr = WERR_NOMEM;
904 goto done;
905 }
906
907 keyname = normalize_reg_path(ctx, keyname);
908 if (!keyname) {
909 werr = WERR_NOMEM;
910 goto done;
911 }
912
913 /* allocate some initial memory */
914
915 buffer = (uint8 *)SMB_MALLOC(1024);
916 if (buffer == NULL) {
917 werr = WERR_NOMEM;
918 goto done;
919 }
920 buflen = 1024;
921 len = 0;
922
923 /* store the number of subkeys */
924
925 len += tdb_pack(buffer+len, buflen-len, "d", num_subkeys);
926
927 /* pack all the strings */
928
929 for (i=0; i<num_subkeys; i++) {
930 size_t thistime;
931
932 thistime = tdb_pack(buffer+len, buflen-len, "f",
933 regsubkey_ctr_specific_key(ctr, i));
934 if (len+thistime > buflen) {
935 size_t thistime2;
936 /*
937 * tdb_pack hasn't done anything because of the short
938 * buffer, allocate extra space.
939 */
940 buffer = SMB_REALLOC_ARRAY(buffer, uint8_t,
941 (len+thistime)*2);
942 if(buffer == NULL) {
943 DEBUG(0, ("regdb_store_keys: Failed to realloc "
944 "memory of size [%u]\n",
945 (unsigned int)(len+thistime)*2));
946 werr = WERR_NOMEM;
947 goto done;
948 }
949 buflen = (len+thistime)*2;
950 thistime2 = tdb_pack(
951 buffer+len, buflen-len, "f",
952 regsubkey_ctr_specific_key(ctr, i));
953 if (thistime2 != thistime) {
954 DEBUG(0, ("tdb_pack failed\n"));
955 werr = WERR_CAN_NOT_COMPLETE;
956 goto done;
957 }
958 }
959 len += thistime;
960 }
961
962 /* finally write out the data */
963
964 dbuf.dptr = buffer;
965 dbuf.dsize = len;
966 werr = ntstatus_to_werror(dbwrap_store_bystring(db, keyname, dbuf,
967 TDB_REPLACE));
968
969 done:
970 TALLOC_FREE(ctx);
971 SAFE_FREE(buffer);
972 return werr;
973 }
974
975 /**
976 * Utility function to store a new empty list of
977 * subkeys of given key specified as parent and subkey name
978 * (thereby creating the key).
979 * If the parent keyname is NULL, then the "subkey" is
980 * interpreted as a base key.
981 * If the subkey list does already exist, it is not modified.
982 *
983 * Must be called from within a transaction.
984 */
985 static WERROR regdb_store_subkey_list(struct db_context *db, const char *parent,
986 const char *key)
987 {
988 WERROR werr;
989 char *path = NULL;
990 struct regsubkey_ctr *subkeys = NULL;
991 TALLOC_CTX *frame = talloc_stackframe();
992
993 if (parent == NULL) {
994 path = talloc_strdup(frame, key);
995 } else {
996 path = talloc_asprintf(frame, "%s\\%s", parent, key);
997 }
998 if (!path) {
999 werr = WERR_NOMEM;
1000 goto done;
1001 }
1002
1003 werr = regsubkey_ctr_init(frame, &subkeys);
1004 W_ERROR_NOT_OK_GOTO_DONE(werr);
1005
1006 werr = regdb_fetch_keys_internal(db, path, subkeys);
1007 if (W_ERROR_IS_OK(werr)) {
1008 /* subkey list exists already - don't modify */
1009 goto done;
1010 }
1011
1012 werr = regsubkey_ctr_reinit(subkeys);
1013 W_ERROR_NOT_OK_GOTO_DONE(werr);
1014
1015 /* create a record with 0 subkeys */
1016 werr = regdb_store_keys_internal2(db, path, subkeys);
1017 if (!W_ERROR_IS_OK(werr)) {
1018 DEBUG(0, ("regdb_store_keys: Failed to store new record for "
1019 "key [%s]: %s\n", path, win_errstr(werr)));
1020 goto done;
1021 }
1022
1023 done:
1024 talloc_free(frame);
1025 return werr;
1026 }
1027
1028 /***********************************************************************
1029 Store the new subkey record and create any child key records that
1030 do not currently exist
1031 ***********************************************************************/
1032
1033 struct regdb_store_keys_context {
1034 const char *key;
1035 struct regsubkey_ctr *ctr;
1036 };
1037
1038 static NTSTATUS regdb_store_keys_action(struct db_context *db,
1039 void *private_data)
1040 {
1041 struct regdb_store_keys_context *store_ctx;
1042 WERROR werr;
1043 int num_subkeys, i;
1044 char *path = NULL;
1045 struct regsubkey_ctr *old_subkeys = NULL;
1046 char *oldkeyname = NULL;
1047 TALLOC_CTX *mem_ctx = talloc_stackframe();
1048
1049 store_ctx = (struct regdb_store_keys_context *)private_data;
1050
1051 /*
1052 * Re-fetch the old keys inside the transaction
1053 */
1054
1055 werr = regsubkey_ctr_init(mem_ctx, &old_subkeys);
1056 W_ERROR_NOT_OK_GOTO_DONE(werr);
1057
1058 werr = regdb_fetch_keys_internal(db, store_ctx->key, old_subkeys);
1059 if (!W_ERROR_IS_OK(werr) &&
1060 !W_ERROR_EQUAL(werr, WERR_NOT_FOUND))
1061 {
1062 goto done;
1063 }
1064
1065 /*
1066 * Make the store operation as safe as possible without transactions:
1067 *
1068 * (1) For each subkey removed from ctr compared with old_subkeys:
1069 *
1070 * (a) First delete the value db entry.
1071 *
1072 * (b) Next delete the secdesc db record.
1073 *
1074 * (c) Then delete the subkey list entry.
1075 *
1076 * (2) Now write the list of subkeys of the parent key,
1077 * deleting removed entries and adding new ones.
1078 *
1079 * (3) Finally create the subkey list entries for the added keys.
1080 *
1081 * This way if we crash half-way in between deleting the subkeys
1082 * and storing the parent's list of subkeys, no old data can pop up
1083 * out of the blue when re-adding keys later on.
1084 */
1085
1086 /* (1) delete removed keys' lists (values/secdesc/subkeys) */
1087
1088 num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
1089 for (i=0; i<num_subkeys; i++) {
1090 oldkeyname = regsubkey_ctr_specific_key(old_subkeys, i);
1091
1092 if (regsubkey_ctr_key_exists(store_ctx->ctr, oldkeyname)) {
1093 /*
1094 * It's still around, don't delete
1095 */
1096 continue;
1097 }
1098
1099 path = talloc_asprintf(mem_ctx, "%s\\%s", store_ctx->key,
1100 oldkeyname);
1101 if (!path) {
1102 werr = WERR_NOMEM;
1103 goto done;
1104 }
1105
1106 werr = regdb_delete_key_lists(db, path);
1107 W_ERROR_NOT_OK_GOTO_DONE(werr);
1108
1109 TALLOC_FREE(path);
1110 }
1111
1112 TALLOC_FREE(old_subkeys);
1113
1114 /* (2) store the subkey list for the parent */
1115
1116 werr = regdb_store_keys_internal2(db, store_ctx->key, store_ctx->ctr);
1117 if (!W_ERROR_IS_OK(werr)) {
1118 DEBUG(0,("regdb_store_keys: Failed to store new subkey list "
1119 "for parent [%s]: %s\n", store_ctx->key,
1120 win_errstr(werr)));
1121 goto done;
1122 }
1123
1124 /* (3) now create records for any subkeys that don't already exist */
1125
1126 num_subkeys = regsubkey_ctr_numkeys(store_ctx->ctr);
1127
1128 for (i=0; i<num_subkeys; i++) {
1129 const char *subkey;
1130
1131 subkey = regsubkey_ctr_specific_key(store_ctx->ctr, i);
1132
1133 werr = regdb_store_subkey_list(db, store_ctx->key, subkey);
1134 W_ERROR_NOT_OK_GOTO_DONE(werr);
1135 }
1136
1137 werr = WERR_OK;
1138
1139 done:
1140 talloc_free(mem_ctx);
1141 return werror_to_ntstatus(werr);
1142 }
1143
1144 static bool regdb_store_keys_internal(struct db_context *db, const char *key,
1145 struct regsubkey_ctr *ctr)
1146 {
1147 int num_subkeys, old_num_subkeys, i;
1148 struct regsubkey_ctr *old_subkeys = NULL;
1149 TALLOC_CTX *ctx = talloc_stackframe();
1150 WERROR werr;
1151 bool ret = false;
1152 struct regdb_store_keys_context store_ctx;
1153
1154 if (!regdb_key_exists(db, key)) {
1155 goto done;
1156 }
1157
1158 /*
1159 * fetch a list of the old subkeys so we can determine if anything has
1160 * changed
1161 */
1162
1163 werr = regsubkey_ctr_init(ctx, &old_subkeys);
1164 if (!W_ERROR_IS_OK(werr)) {
1165 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
1166 goto done;
1167 }
1168
1169 werr = regdb_fetch_keys_internal(db, key, old_subkeys);
1170 if (!W_ERROR_IS_OK(werr) &&
1171 !W_ERROR_EQUAL(werr, WERR_NOT_FOUND))
1172 {
1173 goto done;
1174 }
1175
1176 num_subkeys = regsubkey_ctr_numkeys(ctr);
1177 old_num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
1178 if ((num_subkeys && old_num_subkeys) &&
1179 (num_subkeys == old_num_subkeys)) {
1180
1181 for (i = 0; i < num_subkeys; i++) {
1182 if (strcmp(regsubkey_ctr_specific_key(ctr, i),
1183 regsubkey_ctr_specific_key(old_subkeys, i))
1184 != 0)
1185 {
1186 break;
1187 }
1188 }
1189 if (i == num_subkeys) {
1190 /*
1191 * Nothing changed, no point to even start a tdb
1192 * transaction
1193 */
1194
1195 ret = true;
1196 goto done;
1197 }
1198 }
1199
1200 TALLOC_FREE(old_subkeys);
1201
1202 store_ctx.key = key;
1203 store_ctx.ctr = ctr;
1204
1205 werr = regdb_trans_do(db,
1206 regdb_store_keys_action,
1207 &store_ctx);
1208
1209 ret = W_ERROR_IS_OK(werr);
1210
1211 done:
1212 TALLOC_FREE(ctx);
1213
1214 return ret;
1215 }
1216
1217 bool regdb_store_keys(const char *key, struct regsubkey_ctr *ctr)
1218 {
1219 return regdb_store_keys_internal(regdb, key, ctr);
1220 }
1221
1222 /**
1223 * create a subkey of a given key
1224 */
1225
1226 struct regdb_create_subkey_context {
1227 const char *key;
1228 const char *subkey;
1229 };
1230
1231 static NTSTATUS regdb_create_subkey_action(struct db_context *db,
1232 void *private_data)
1233 {
1234 WERROR werr;
1235 struct regdb_create_subkey_context *create_ctx;
1236 struct regsubkey_ctr *subkeys;
1237 TALLOC_CTX *mem_ctx = talloc_stackframe();
1238
1239 create_ctx = (struct regdb_create_subkey_context *)private_data;
1240
1241 werr = regsubkey_ctr_init(mem_ctx, &subkeys);
1242 W_ERROR_NOT_OK_GOTO_DONE(werr);
1243
1244 werr = regdb_fetch_keys_internal(db, create_ctx->key, subkeys);
1245 W_ERROR_NOT_OK_GOTO_DONE(werr);
1246
1247 werr = regsubkey_ctr_addkey(subkeys, create_ctx->subkey);
1248 W_ERROR_NOT_OK_GOTO_DONE(werr);
1249
1250 werr = regdb_store_keys_internal2(db, create_ctx->key, subkeys);
1251 if (!W_ERROR_IS_OK(werr)) {
1252 DEBUG(0, (__location__ " failed to store new subkey list for "
1253 "parent key %s: %s\n", create_ctx->key,
1254 win_errstr(werr)));
1255 }
1256
1257 werr = regdb_store_subkey_list(db, create_ctx->key, create_ctx->subkey);
1258
1259 done:
1260 talloc_free(mem_ctx);
1261 return werror_to_ntstatus(werr);
1262 }
1263
1264 static WERROR regdb_create_subkey_internal(struct db_context *db,
1265 const char *key,
1266 const char *subkey)
1267 {
1268 WERROR werr;
1269 struct regsubkey_ctr *subkeys;
1270 TALLOC_CTX *mem_ctx = talloc_stackframe();
1271 struct regdb_create_subkey_context create_ctx;
1272
1273 if (!regdb_key_exists(db, key)) {
1274 werr = WERR_NOT_FOUND;
1275 goto done;
1276 }
1277
1278 werr = regsubkey_ctr_init(mem_ctx, &subkeys);
1279 W_ERROR_NOT_OK_GOTO_DONE(werr);
1280
1281 werr = regdb_fetch_keys_internal(db, key, subkeys);
1282 W_ERROR_NOT_OK_GOTO_DONE(werr);
1283
1284 if (regsubkey_ctr_key_exists(subkeys, subkey)) {
1285 werr = WERR_OK;
1286 goto done;
1287 }
1288
1289 talloc_free(subkeys);
1290
1291 create_ctx.key = key;
1292 create_ctx.subkey = subkey;
1293
1294 werr = regdb_trans_do(db,
1295 regdb_create_subkey_action,
1296 &create_ctx);
1297
1298 done:
1299 talloc_free(mem_ctx);
1300 return werr;
1301 }
1302
1303 static WERROR regdb_create_subkey(const char *key, const char *subkey)
1304 {
1305 return regdb_create_subkey_internal(regdb, key, subkey);
1306 }
1307
1308 /**
1309 * create a base key
1310 */
1311
1312 struct regdb_create_basekey_context {
1313 const char *key;
1314 };
1315
1316 static NTSTATUS regdb_create_basekey_action(struct db_context *db,
1317 void *private_data)
1318 {
1319 WERROR werr;
1320 struct regdb_create_basekey_context *create_ctx;
1321
1322 create_ctx = (struct regdb_create_basekey_context *)private_data;
1323
1324 werr = regdb_store_subkey_list(db, NULL, create_ctx->key);
1325
1326 return werror_to_ntstatus(werr);
1327 }
1328
1329 static WERROR regdb_create_basekey(struct db_context *db, const char *key)
1330 {
1331 WERROR werr;
1332 struct regdb_create_subkey_context create_ctx;
1333
1334 create_ctx.key = key;
1335
1336 werr = regdb_trans_do(db,
1337 regdb_create_basekey_action,
1338 &create_ctx);
1339
1340 return werr;
1341 }
1342
1343 /**
1344 * create a subkey of a given key
1345 */
1346
1347 struct regdb_delete_subkey_context {
1348 const char *key;
1349 const char *subkey;
1350 const char *path;
1351 bool lazy;
1352 };
1353
1354 static NTSTATUS regdb_delete_subkey_action(struct db_context *db,
1355 void *private_data)
1356 {
1357 WERROR werr;
1358 struct regdb_delete_subkey_context *delete_ctx;
1359 struct regsubkey_ctr *subkeys;
1360 TALLOC_CTX *mem_ctx = talloc_stackframe();
1361
1362 delete_ctx = (struct regdb_delete_subkey_context *)private_data;
1363
1364 werr = regdb_delete_key_lists(db, delete_ctx->path);
1365 W_ERROR_NOT_OK_GOTO_DONE(werr);
1366
1367 if (delete_ctx->lazy) {
1368 goto done;
1369 }
1370
1371 werr = regsubkey_ctr_init(mem_ctx, &subkeys);
1372 W_ERROR_NOT_OK_GOTO_DONE(werr);
1373
1374 werr = regdb_fetch_keys_internal(db, delete_ctx->key, subkeys);
1375 W_ERROR_NOT_OK_GOTO_DONE(werr);
1376
1377 werr = regsubkey_ctr_delkey(subkeys, delete_ctx->subkey);
1378 W_ERROR_NOT_OK_GOTO_DONE(werr);
1379
1380 werr = regdb_store_keys_internal2(db, delete_ctx->key, subkeys);
1381 if (!W_ERROR_IS_OK(werr)) {
1382 DEBUG(0, (__location__ " failed to store new subkey_list for "
1383 "parent key %s: %s\n", delete_ctx->key,
1384 win_errstr(werr)));
1385 }
1386
1387 done:
1388 talloc_free(mem_ctx);
1389 return werror_to_ntstatus(werr);
1390 }
1391
1392 static WERROR regdb_delete_subkey(const char *key, const char *subkey, bool lazy)
1393 {
1394 WERROR werr;
1395 char *path;
1396 struct regdb_delete_subkey_context delete_ctx;
1397 TALLOC_CTX *mem_ctx = talloc_stackframe();
1398
1399 if (!regdb_key_exists(regdb, key)) {
1400 werr = WERR_NOT_FOUND;
1401 goto done;
1402 }
1403
1404 path = talloc_asprintf(mem_ctx, "%s\\%s", key, subkey);
1405 if (path == NULL) {
1406 werr = WERR_NOMEM;
1407 goto done;
1408 }
1409
1410 if (!regdb_key_exists(regdb, path)) {
1411 werr = WERR_OK;
1412 goto done;
1413 }
1414
1415 delete_ctx.key = key;
1416 delete_ctx.subkey = subkey;
1417 delete_ctx.path = path;
1418 delete_ctx.lazy = lazy;
1419
1420 werr = regdb_trans_do(regdb,
1421 regdb_delete_subkey_action,
1422 &delete_ctx);
1423
1424 done:
1425 talloc_free(mem_ctx);
1426 return werr;
1427 }
1428
1429 static TDB_DATA regdb_fetch_key_internal(struct db_context *db,
1430 TALLOC_CTX *mem_ctx, const char *key)
1431 {
1432 char *path = NULL;
1433 TDB_DATA data;
1434
1435 path = normalize_reg_path(mem_ctx, key);
1436 if (!path) {
1437 return make_tdb_data(NULL, 0);
1438 }
1439
1440 data = dbwrap_fetch_bystring(db, mem_ctx, path);
1441
1442 TALLOC_FREE(path);
1443 return data;
1444 }
1445
1446
1447 /**
1448 * Check for the existence of a key.
1449 *
1450 * Existence of a key is authoritatively defined by
1451 * the existence of the record that contains the list
1452 * of its subkeys.
1453 *
1454 * Return false, if the record does not match the correct
1455 * structure of an initial 4-byte counter and then a
1456 * list of the corresponding number of zero-terminated
1457 * strings.
1458 */
1459 static bool regdb_key_exists(struct db_context *db, const char *key)
1460 {
1461 TALLOC_CTX *mem_ctx = talloc_stackframe();
1462 TDB_DATA value;
1463 bool ret = false;
1464 char *path;
1465 uint32_t buflen;
1466 const char *buf;
1467 uint32_t num_items, i;
1468 int32_t len;
1469
1470 if (key == NULL) {
1471 goto done;
1472 }
1473
1474 path = normalize_reg_path(mem_ctx, key);
1475 if (path == NULL) {
1476 DEBUG(0, ("out of memory! (talloc failed)\n"));
1477 goto done;
1478 }
1479
1480 if (*path == '\0') {
1481 goto done;
1482 }
1483
1484 value = regdb_fetch_key_internal(db, mem_ctx, path);
1485 if (value.dptr == NULL) {
1486 goto done;
1487 }
1488
1489 if (value.dsize == 0) {
1490 DEBUG(10, ("regdb_key_exists: subkeylist-record for key "
1491 "[%s] is empty: Could be a deleted record in a "
1492 "clustered (ctdb) environment?\n",
1493 path));
1494 goto done;
1495 }
1496
1497 len = tdb_unpack(value.dptr, value.dsize, "d", &num_items);
1498 if (len == (int32_t)-1) {
1499 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record for key "
1500 "[%s] is invalid: Could not parse initial 4-byte "
1501 "counter. record data length is %u.\n",
1502 path, (unsigned int)value.dsize));
1503 goto done;
1504 }
1505
1506 /*
1507 * Note: the tdb_unpack check above implies that len <= value.dsize
1508 */
1509 buflen = value.dsize - len;
1510 buf = (const char *)value.dptr + len;
1511
1512 len = 0;
1513
1514 for (i = 0; i < num_items; i++) {
1515 if (buflen == 0) {
1516 break;
1517 }
1518 len = strnlen(buf, buflen) + 1;
1519 if (buflen < len) {
1520 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record "
1521 "for key [%s] is corrupt: %u items expected, "
1522 "item number %u is not zero terminated.\n",
1523 path, num_items, i+1));
1524 goto done;
1525 }
1526
1527 buf += len;
1528 buflen -= len;
1529 }
1530
1531 if (buflen > 0) {
1532 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record for key "
1533 "[%s] is corrupt: %u items expected and found, but "
1534 "the record contains additional %u bytes\n",
1535 path, num_items, buflen));
1536 goto done;
1537 }
1538
1539 if (i < num_items) {
1540 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record for key "
1541 "[%s] is corrupt: %u items expected, but only %u "
1542 "items found.\n",
1543 path, num_items, i+1));
1544 goto done;
1545 }
1546
1547 ret = true;
1548
1549 done:
1550 TALLOC_FREE(mem_ctx);
1551 return ret;
1552 }
1553
1554
1555 /***********************************************************************
1556 Retrieve an array of strings containing subkeys. Memory should be
1557 released by the caller.
1558 ***********************************************************************/
1559
1560 static WERROR regdb_fetch_keys_internal(struct db_context *db, const char *key,
1561 struct regsubkey_ctr *ctr)
1562 {
1563 WERROR werr;
1564 uint32_t num_items;
1565 uint8 *buf;
1566 uint32 buflen, len;
1567 int i;
1568 fstring subkeyname;
1569 TALLOC_CTX *frame = talloc_stackframe();
1570 TDB_DATA value;
1571
1572 DEBUG(11,("regdb_fetch_keys: Enter key => [%s]\n", key ? key : "NULL"));
1573
1574 if (!regdb_key_exists(db, key)) {
1575 DEBUG(10, ("key [%s] not found\n", key));
1576 werr = WERR_NOT_FOUND;
1577 goto done;
1578 }
1579
1580 werr = regsubkey_ctr_reinit(ctr);
1581 W_ERROR_NOT_OK_GOTO_DONE(werr);
1582
1583 werr = regsubkey_ctr_set_seqnum(ctr, db->get_seqnum(db));
1584 W_ERROR_NOT_OK_GOTO_DONE(werr);
1585
1586 value = regdb_fetch_key_internal(db, frame, key);
1587
1588 if (value.dsize == 0 || value.dptr == NULL) {
1589 DEBUG(10, ("regdb_fetch_keys: no subkeys found for key [%s]\n",
1590 key));
1591 goto done;
1592 }
1593
1594 buf = value.dptr;
1595 buflen = value.dsize;
1596 len = tdb_unpack( buf, buflen, "d", &num_items);
1597 if (len == (uint32_t)-1) {
1598 werr = WERR_NOT_FOUND;
1599 goto done;
1600 }
1601
1602 for (i=0; i<num_items; i++) {
1603 len += tdb_unpack(buf+len, buflen-len, "f", subkeyname);
1604 werr = regsubkey_ctr_addkey(ctr, subkeyname);
1605 if (!W_ERROR_IS_OK(werr)) {
1606 DEBUG(5, ("regdb_fetch_keys: regsubkey_ctr_addkey "
1607 "failed: %s\n", win_errstr(werr)));
1608 num_items = 0;
1609 goto done;
1610 }
1611 }
1612
1613 DEBUG(11,("regdb_fetch_keys: Exit [%d] items\n", num_items));
1614
1615 done:
1616 TALLOC_FREE(frame);
1617 return werr;
1618 }
1619
1620 int regdb_fetch_keys(const char *key, struct regsubkey_ctr *ctr)
1621 {
1622 WERROR werr;
1623
1624 werr = regdb_fetch_keys_internal(regdb, key, ctr);
1625 if (!W_ERROR_IS_OK(werr)) {
1626 return -1;
1627 }
1628
1629 return regsubkey_ctr_numkeys(ctr);
1630 }
1631
1632 /****************************************************************************
1633 Unpack a list of registry values frem the TDB
1634 ***************************************************************************/
1635
1636 static int regdb_unpack_values(struct regval_ctr *values, uint8 *buf, int buflen)
1637 {
1638 int len = 0;
1639 uint32 type;
1640 fstring valuename;
1641 uint32 size;
1642 uint8 *data_p;
1643 uint32 num_values = 0;
1644 int i;
1645
1646 /* loop and unpack the rest of the registry values */
1647
1648 len += tdb_unpack(buf+len, buflen-len, "d", &num_values);
1649
1650 for ( i=0; i<num_values; i++ ) {
1651 /* unpack the next regval */
1652
1653 type = REG_NONE;
1654 size = 0;
1655 data_p = NULL;
1656 valuename[0] = '\0';
1657 len += tdb_unpack(buf+len, buflen-len, "fdB",
1658 valuename,
1659 &type,
1660 &size,
1661 &data_p);
1662
1663 regval_ctr_addvalue(values, valuename, type,
1664 (uint8_t *)data_p, size);
1665 SAFE_FREE(data_p); /* 'B' option to tdb_unpack does a malloc() */
1666
1667 DEBUG(8,("specific: [%s], len: %d\n", valuename, size));
1668 }
1669
1670 return len;
1671 }
1672
1673 /****************************************************************************
1674 Pack all values in all printer keys
1675 ***************************************************************************/
1676
1677 static int regdb_pack_values(struct regval_ctr *values, uint8 *buf, int buflen)
1678 {
1679 int len = 0;
1680 int i;
1681 struct regval_blob *val;
1682 int num_values;
1683
1684 if ( !values )
1685 return 0;
1686
1687 num_values = regval_ctr_numvals( values );
1688
1689 /* pack the number of values first */
1690
1691 len += tdb_pack( buf+len, buflen-len, "d", num_values );
1692
1693 /* loop over all values */
1694
1695 for ( i=0; i<num_values; i++ ) {
1696 val = regval_ctr_specific_value( values, i );
1697 len += tdb_pack(buf+len, buflen-len, "fdB",
1698 regval_name(val),
1699 regval_type(val),
1700 regval_size(val),
1701 regval_data_p(val) );
1702 }
1703
1704 return len;
1705 }
1706
1707 /***********************************************************************
1708 Retrieve an array of strings containing subkeys. Memory should be
1709 released by the caller.
1710 ***********************************************************************/
1711
1712 static int regdb_fetch_values_internal(struct db_context *db, const char* key,
1713 struct regval_ctr *values)
1714 {
1715 char *keystr = NULL;
1716 TALLOC_CTX *ctx = talloc_stackframe();
1717 int ret = 0;
1718 TDB_DATA value;
1719 WERROR werr;
1720
1721 DEBUG(10,("regdb_fetch_values: Looking for value of key [%s] \n", key));
1722
1723 if (!regdb_key_exists(db, key)) {
1724 goto done;
1725 }
1726
1727 keystr = talloc_asprintf(ctx, "%s\\%s", REG_VALUE_PREFIX, key);
1728 if (!keystr) {
1729 goto done;
1730 }
1731
1732 werr = regval_ctr_set_seqnum(values, db->get_seqnum(db));
1733 W_ERROR_NOT_OK_GOTO_DONE(werr);
1734
1735 value = regdb_fetch_key_internal(db, ctx, keystr);
1736
1737 if (!value.dptr) {
1738 /* all keys have zero values by default */
1739 goto done;
1740 }
1741
1742 regdb_unpack_values(values, value.dptr, value.dsize);
1743 ret = regval_ctr_numvals(values);
1744
1745 done:
1746 TALLOC_FREE(ctx);
1747 return ret;
1748 }
1749
1750 int regdb_fetch_values(const char* key, struct regval_ctr *values)
1751 {
1752 return regdb_fetch_values_internal(regdb, key, values);
1753 }
1754
1755 static NTSTATUS regdb_store_values_internal(struct db_context *db,
1756 const char *key,
1757 struct regval_ctr *values)
1758 {
1759 TDB_DATA old_data, data;
1760 char *keystr = NULL;
1761 TALLOC_CTX *ctx = talloc_stackframe();
1762 int len;
1763 NTSTATUS status;
1764
1765 DEBUG(10,("regdb_store_values: Looking for value of key [%s] \n", key));
1766
1767 if (!regdb_key_exists(db, key)) {
1768 status = NT_STATUS_NOT_FOUND;
1769 goto done;
1770 }
1771
1772 ZERO_STRUCT(data);
1773
1774 len = regdb_pack_values(values, data.dptr, data.dsize);
1775 if (len <= 0) {
1776 DEBUG(0,("regdb_store_values: unable to pack values. len <= 0\n"));
1777 status = NT_STATUS_UNSUCCESSFUL;
1778 goto done;
1779 }
1780
1781 data.dptr = talloc_array(ctx, uint8, len);
1782 data.dsize = len;
1783
1784 len = regdb_pack_values(values, data.dptr, data.dsize);
1785
1786 SMB_ASSERT( len == data.dsize );
1787
1788 keystr = talloc_asprintf(ctx, "%s\\%s", REG_VALUE_PREFIX, key );
1789 if (!keystr) {
1790 status = NT_STATUS_NO_MEMORY;
1791 goto done;
1792 }
1793 keystr = normalize_reg_path(ctx, keystr);
1794 if (!keystr) {
1795 status = NT_STATUS_NO_MEMORY;
1796 goto done;
1797 }
1798
1799 old_data = dbwrap_fetch_bystring(db, ctx, keystr);
1800
1801 if ((old_data.dptr != NULL)
1802 && (old_data.dsize == data.dsize)
1803 && (memcmp(old_data.dptr, data.dptr, data.dsize) == 0))
1804 {
1805 status = NT_STATUS_OK;
1806 goto done;
1807 }
1808
1809 status = dbwrap_trans_store_bystring(db, keystr, data, TDB_REPLACE);
1810
1811 done:
1812 TALLOC_FREE(ctx);
1813 return status;
1814 }
1815
1816 struct regdb_store_values_ctx {
1817 const char *key;
1818 struct regval_ctr *values;
1819 };
1820
1821 static NTSTATUS regdb_store_values_action(struct db_context *db,
1822 void *private_data)
1823 {
1824 NTSTATUS status;
1825 struct regdb_store_values_ctx *ctx =
1826 (struct regdb_store_values_ctx *)private_data;
1827
1828 status = regdb_store_values_internal(db, ctx->key, ctx->values);
1829
1830 return status;
1831 }
1832
1833 bool regdb_store_values(const char *key, struct regval_ctr *values)
1834 {
1835 WERROR werr;
1836 struct regdb_store_values_ctx ctx;
1837
1838 ctx.key = key;
1839 ctx.values = values;
1840
1841 werr = regdb_trans_do(regdb, regdb_store_values_action, &ctx);
1842
1843 return W_ERROR_IS_OK(werr);
1844 }
1845
1846 static WERROR regdb_get_secdesc(TALLOC_CTX *mem_ctx, const char *key,
1847 struct security_descriptor **psecdesc)
1848 {
1849 char *tdbkey;
1850 TDB_DATA data;
1851 NTSTATUS status;
1852 TALLOC_CTX *tmp_ctx = talloc_stackframe();
1853 WERROR err = WERR_OK;
1854
1855 DEBUG(10, ("regdb_get_secdesc: Getting secdesc of key [%s]\n", key));
1856
1857 if (!regdb_key_exists(regdb, key)) {
1858 err = WERR_BADFILE;
1859 goto done;
1860 }
1861
1862 tdbkey = talloc_asprintf(tmp_ctx, "%s\\%s", REG_SECDESC_PREFIX, key);
1863 if (tdbkey == NULL) {
1864 err = WERR_NOMEM;
1865 goto done;
1866 }
1867
1868 tdbkey = normalize_reg_path(tmp_ctx, tdbkey);
1869 if (tdbkey == NULL) {
1870 err = WERR_NOMEM;
1871 goto done;
1872 }
1873
1874 data = dbwrap_fetch_bystring(regdb, tmp_ctx, tdbkey);
1875 if (data.dptr == NULL) {
1876 err = WERR_BADFILE;
1877 goto done;
1878 }
1879
1880 status = unmarshall_sec_desc(mem_ctx, (uint8 *)data.dptr, data.dsize,
1881 psecdesc);
1882
1883 if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
1884 err = WERR_NOMEM;
1885 } else if (!NT_STATUS_IS_OK(status)) {
1886 err = WERR_REG_CORRUPT;
1887 }
1888
1889 done:
1890 TALLOC_FREE(tmp_ctx);
1891 return err;
1892 }
1893
1894 struct regdb_set_secdesc_ctx {
1895 const char *key;
1896 struct security_descriptor *secdesc;
1897 };
1898
1899 static NTSTATUS regdb_set_secdesc_action(struct db_context *db,
1900 void *private_data)
1901 {
1902 char *tdbkey;
1903 NTSTATUS status;
1904 TDB_DATA tdbdata;
1905 struct regdb_set_secdesc_ctx *ctx =
1906 (struct regdb_set_secdesc_ctx *)private_data;
1907 TALLOC_CTX *frame = talloc_stackframe();
1908
1909 tdbkey = talloc_asprintf(frame, "%s\\%s", REG_SECDESC_PREFIX, ctx->key);
1910 if (tdbkey == NULL) {
1911 status = NT_STATUS_NO_MEMORY;
1912 goto done;
1913 }
1914
1915 tdbkey = normalize_reg_path(frame, tdbkey);
1916 if (tdbkey == NULL) {
1917 status = NT_STATUS_NO_MEMORY;
1918 goto done;
1919 }
1920
1921 if (ctx->secdesc == NULL) {
1922 /* assuming a delete */
1923 status = dbwrap_delete_bystring(db, tdbkey);
1924 goto done;
1925 }
1926
1927 status = marshall_sec_desc(frame, ctx->secdesc, &tdbdata.dptr,
1928 &tdbdata.dsize);
1929 if (!NT_STATUS_IS_OK(status)) {
1930 goto done;
1931 }
1932
1933 status = dbwrap_store_bystring(db, tdbkey, tdbdata, 0);
1934
1935 done:
1936 TALLOC_FREE(frame);
1937 return status;
1938 }
1939
1940 static WERROR regdb_set_secdesc(const char *key,
1941 struct security_descriptor *secdesc)
1942 {
1943 WERROR err;
1944 struct regdb_set_secdesc_ctx ctx;
1945
1946 if (!regdb_key_exists(regdb, key)) {
1947 err = WERR_BADFILE;
1948 goto done;
1949 }
1950
1951 ctx.key = key;
1952 ctx.secdesc = secdesc;
1953
1954 err = regdb_trans_do(regdb, regdb_set_secdesc_action, &ctx);
1955
1956 done:
1957 return err;
1958 }
1959
1960 bool regdb_subkeys_need_update(struct regsubkey_ctr *subkeys)
1961 {
1962 return (regdb_get_seqnum() != regsubkey_ctr_get_seqnum(subkeys));
1963 }
1964
1965 bool regdb_values_need_update(struct regval_ctr *values)
1966 {
1967 return (regdb_get_seqnum() != regval_ctr_get_seqnum(values));
1968 }
1969
1970 /*
1971 * Table of function pointers for default access
1972 */
1973
1974 struct registry_ops regdb_ops = {
1975 .fetch_subkeys = regdb_fetch_keys,
1976 .fetch_values = regdb_fetch_values,
1977 .store_subkeys = regdb_store_keys,
1978 .store_values = regdb_store_values,
1979 .create_subkey = regdb_create_subkey,
1980 .delete_subkey = regdb_delete_subkey,
1981 .get_secdesc = regdb_get_secdesc,
1982 .set_secdesc = regdb_set_secdesc,
1983 .subkeys_need_update = regdb_subkeys_need_update,
1984 .values_need_update = regdb_values_need_update
1985 };
reg import