source: vendor/3.6.23/source3/registry/reg_api.c

Last change on this file was 746, checked in by Silvan Scherrer, 13 years ago

Samba Server: updated vendor to 3.6.9
File size: 24.3 KB
Line 
1/*
2 * Unix SMB/CIFS implementation.
3 * Virtual Windows Registry Layer
4 * Copyright (C) Volker Lendecke 2006
5 * Copyright (C) Michael Adam 2007-2010
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, see <http://www.gnu.org/licenses/>.
19 */
20
21/* Attempt to wrap the existing API in a more winreg.idl-like way */
22
23/*
24 * Here is a list of winreg.idl functions and corresponding implementations
25 * provided here:
26 *
27 * 0x00 winreg_OpenHKCR
28 * 0x01 winreg_OpenHKCU
29 * 0x02 winreg_OpenHKLM
30 * 0x03 winreg_OpenHKPD
31 * 0x04 winreg_OpenHKU
32 * 0x05 winreg_CloseKey
33 * 0x06 winreg_CreateKey reg_createkey
34 * 0x07 winreg_DeleteKey reg_deletekey
35 * 0x08 winreg_DeleteValue reg_deletevalue
36 * 0x09 winreg_EnumKey reg_enumkey
37 * 0x0a winreg_EnumValue reg_enumvalue
38 * 0x0b winreg_FlushKey
39 * 0x0c winreg_GetKeySecurity reg_getkeysecurity
40 * 0x0d winreg_LoadKey
41 * 0x0e winreg_NotifyChangeKeyValue
42 * 0x0f winreg_OpenKey reg_openkey
43 * 0x10 winreg_QueryInfoKey reg_queryinfokey
44 * 0x11 winreg_QueryValue reg_queryvalue
45 * 0x12 winreg_ReplaceKey
46 * 0x13 winreg_RestoreKey reg_restorekey
47 * 0x14 winreg_SaveKey reg_savekey
48 * 0x15 winreg_SetKeySecurity reg_setkeysecurity
49 * 0x16 winreg_SetValue reg_setvalue
50 * 0x17 winreg_UnLoadKey
51 * 0x18 winreg_InitiateSystemShutdown
52 * 0x19 winreg_AbortSystemShutdown
53 * 0x1a winreg_GetVersion reg_getversion
54 * 0x1b winreg_OpenHKCC
55 * 0x1c winreg_OpenHKDD
56 * 0x1d winreg_QueryMultipleValues reg_querymultiplevalues
57 * 0x1e winreg_InitiateSystemShutdownEx
58 * 0x1f winreg_SaveKeyEx
59 * 0x20 winreg_OpenHKPT
60 * 0x21 winreg_OpenHKPN
61 * 0x22 winreg_QueryMultipleValues2 reg_querymultiplevalues
62 *
63 */
64
65#include "includes.h"
66#include "registry.h"
67#include "reg_api.h"
68#include "reg_cachehook.h"
69#include "reg_backend_db.h"
70#include "reg_dispatcher.h"
71#include "reg_objects.h"
72#include "../librpc/gen_ndr/ndr_security.h"
73
74#undef DBGC_CLASS
75#define DBGC_CLASS DBGC_REGISTRY
76
77
78/**********************************************************************
79 * Helper functions
80 **********************************************************************/
81
82static WERROR fill_value_cache(struct registry_key *key)
83{
84 WERROR werr;
85
86 if (key->values != NULL) {
87 if (!reg_values_need_update(key->key, key->values)) {
88 return WERR_OK;
89 }
90 }
91
92 TALLOC_FREE(key->values);
93 werr = regval_ctr_init(key, &(key->values));
94 W_ERROR_NOT_OK_RETURN(werr);
95
96 if (fetch_reg_values(key->key, key->values) == -1) {
97 TALLOC_FREE(key->values);
98 return WERR_BADFILE;
99 }
100
101 return WERR_OK;
102}
103
104static WERROR fill_subkey_cache(struct registry_key *key)
105{
106 WERROR werr;
107
108 if (key->subkeys != NULL) {
109 if (!reg_subkeys_need_update(key->key, key->subkeys)) {
110 return WERR_OK;
111 }
112 }
113
114 werr = regsubkey_ctr_init(key, &(key->subkeys));
115 W_ERROR_NOT_OK_RETURN(werr);
116
117 if (fetch_reg_keys(key->key, key->subkeys) == -1) {
118 TALLOC_FREE(key->subkeys);
119 return WERR_BADFILE;
120 }
121
122 return WERR_OK;
123}
124
125static int regkey_destructor(struct registry_key_handle *key)
126{
127 return regdb_close();
128}
129
130static WERROR regkey_open_onelevel(TALLOC_CTX *mem_ctx,
131 struct registry_key *parent,
132 const char *name,
133 const struct security_token *token,
134 uint32 access_desired,
135 struct registry_key **pregkey)
136{
137 WERROR result = WERR_OK;
138 struct registry_key *regkey;
139 struct registry_key_handle *key;
140
141 DEBUG(7,("regkey_open_onelevel: name = [%s]\n", name));
142
143 SMB_ASSERT(strchr(name, '\\') == NULL);
144
145 if (!(regkey = TALLOC_ZERO_P(mem_ctx, struct registry_key)) ||
146 !(regkey->token = dup_nt_token(regkey, token)) ||
147 !(regkey->key = TALLOC_ZERO_P(regkey, struct registry_key_handle)))
148 {
149 result = WERR_NOMEM;
150 goto done;
151 }
152
153 result = regdb_open();
154 if (!(W_ERROR_IS_OK(result))) {
155 goto done;
156 }
157
158 key = regkey->key;
159 talloc_set_destructor(key, regkey_destructor);
160
161 /* initialization */
162
163 key->type = REG_KEY_GENERIC;
164
165 if (name[0] == '\0') {
166 /*
167 * Open a copy of the parent key
168 */
169 if (!parent) {
170 result = WERR_BADFILE;
171 goto done;
172 }
173 key->name = talloc_strdup(key, parent->key->name);
174 }
175 else {
176 /*
177 * Normal subkey open
178 */
179 key->name = talloc_asprintf(key, "%s%s%s",
180 parent ? parent->key->name : "",
181 parent ? "\\": "",
182 name);
183 }
184
185 if (key->name == NULL) {
186 result = WERR_NOMEM;
187 goto done;
188 }
189
190 /* Tag this as a Performance Counter Key */
191
192 if( StrnCaseCmp(key->name, KEY_HKPD, strlen(KEY_HKPD)) == 0 )
193 key->type = REG_KEY_HKPD;
194
195 /* Look up the table of registry I/O operations */
196
197 key->ops = reghook_cache_find( key->name );
198 if (key->ops == NULL) {
199 DEBUG(0,("reg_open_onelevel: Failed to assign "
200 "registry_ops to [%s]\n", key->name ));
201 result = WERR_BADFILE;
202 goto done;
203 }
204
205 /* FIXME: Existence is currently checked by fetching the subkeys */
206
207 result = fill_subkey_cache(regkey);
208 if (!W_ERROR_IS_OK(result)) {
209 goto done;
210 }
211
212 if ( !regkey_access_check( key, access_desired, &key->access_granted,
213 token ) ) {
214 result = WERR_ACCESS_DENIED;
215 goto done;
216 }
217
218 *pregkey = regkey;
219 result = WERR_OK;
220
221done:
222 if ( !W_ERROR_IS_OK(result) ) {
223 TALLOC_FREE(regkey);
224 }
225
226 return result;
227}
228
229WERROR reg_openhive(TALLOC_CTX *mem_ctx, const char *hive,
230 uint32 desired_access,
231 const struct security_token *token,
232 struct registry_key **pkey)
233{
234 SMB_ASSERT(hive != NULL);
235 SMB_ASSERT(hive[0] != '\0');
236 SMB_ASSERT(strchr(hive, '\\') == NULL);
237
238 return regkey_open_onelevel(mem_ctx, NULL, hive, token, desired_access,
239 pkey);
240}
241
242
243/**********************************************************************
244 * The API functions
245 **********************************************************************/
246
247WERROR reg_openkey(TALLOC_CTX *mem_ctx, struct registry_key *parent,
248 const char *name, uint32 desired_access,
249 struct registry_key **pkey)
250{
251 struct registry_key *direct_parent = parent;
252 WERROR err;
253 char *p, *path;
254 size_t len;
255 TALLOC_CTX *frame = talloc_stackframe();
256
257 path = talloc_strdup(frame, name);
258 if (path == NULL) {
259 err = WERR_NOMEM;
260 goto error;
261 }
262
263 len = strlen(path);
264
265 if ((len > 0) && (path[len-1] == '\\')) {
266 path[len-1] = '\0';
267 }
268
269 while ((p = strchr(path, '\\')) != NULL) {
270 char *name_component;
271 struct registry_key *tmp;
272
273 name_component = talloc_strndup(frame, path, (p - path));
274 if (name_component == NULL) {
275 err = WERR_NOMEM;
276 goto error;
277 }
278
279 err = regkey_open_onelevel(frame, direct_parent,
280 name_component, parent->token,
281 KEY_ENUMERATE_SUB_KEYS, &tmp);
282
283 if (!W_ERROR_IS_OK(err)) {
284 goto error;
285 }
286
287 direct_parent = tmp;
288 path = p+1;
289 }
290
291 err = regkey_open_onelevel(mem_ctx, direct_parent, path, parent->token,
292 desired_access, pkey);
293
294error:
295 talloc_free(frame);
296 return err;
297}
298
299WERROR reg_enumkey(TALLOC_CTX *mem_ctx, struct registry_key *key,
300 uint32 idx, char **name, NTTIME *last_write_time)
301{
302 WERROR err;
303
304 if (!(key->key->access_granted & KEY_ENUMERATE_SUB_KEYS)) {
305 return WERR_ACCESS_DENIED;
306 }
307
308 if (!W_ERROR_IS_OK(err = fill_subkey_cache(key))) {
309 return err;
310 }
311
312 if (idx >= regsubkey_ctr_numkeys(key->subkeys)) {
313 return WERR_NO_MORE_ITEMS;
314 }
315
316 if (!(*name = talloc_strdup(mem_ctx,
317 regsubkey_ctr_specific_key(key->subkeys, idx))))
318 {
319 return WERR_NOMEM;
320 }
321
322 if (last_write_time) {
323 *last_write_time = 0;
324 }
325
326 return WERR_OK;
327}
328
329WERROR reg_enumvalue(TALLOC_CTX *mem_ctx, struct registry_key *key,
330 uint32 idx, char **pname, struct registry_value **pval)
331{
332 struct registry_value *val;
333 struct regval_blob *blob;
334 WERROR err;
335
336 if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
337 return WERR_ACCESS_DENIED;
338 }
339
340 if (!(W_ERROR_IS_OK(err = fill_value_cache(key)))) {
341 return err;
342 }
343
344 if (idx >= regval_ctr_numvals(key->values)) {
345 return WERR_NO_MORE_ITEMS;
346 }
347
348 blob = regval_ctr_specific_value(key->values, idx);
349
350 val = talloc_zero(mem_ctx, struct registry_value);
351 if (val == NULL) {
352 return WERR_NOMEM;
353 }
354
355 val->type = regval_type(blob);
356 val->data = data_blob_talloc(mem_ctx, regval_data_p(blob), regval_size(blob));
357
358 if (pname
359 && !(*pname = talloc_strdup(
360 mem_ctx, regval_name(blob)))) {
361 TALLOC_FREE(val);
362 return WERR_NOMEM;
363 }
364
365 *pval = val;
366 return WERR_OK;
367}
368
369static WERROR reg_enumvalue_nocachefill(TALLOC_CTX *mem_ctx,
370 struct registry_key *key,
371 uint32 idx, char **pname,
372 struct registry_value **pval)
373{
374 struct registry_value *val;
375 struct regval_blob *blob;
376
377 if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
378 return WERR_ACCESS_DENIED;
379 }
380
381 if (idx >= regval_ctr_numvals(key->values)) {
382 return WERR_NO_MORE_ITEMS;
383 }
384
385 blob = regval_ctr_specific_value(key->values, idx);
386
387 val = talloc_zero(mem_ctx, struct registry_value);
388 if (val == NULL) {
389 return WERR_NOMEM;
390 }
391
392 val->type = regval_type(blob);
393 val->data = data_blob_talloc(mem_ctx, regval_data_p(blob), regval_size(blob));
394
395 if (pname
396 && !(*pname = talloc_strdup(
397 mem_ctx, regval_name(blob)))) {
398 TALLOC_FREE(val);
399 return WERR_NOMEM;
400 }
401
402 *pval = val;
403 return WERR_OK;
404}
405
406WERROR reg_queryvalue(TALLOC_CTX *mem_ctx, struct registry_key *key,
407 const char *name, struct registry_value **pval)
408{
409 WERROR err;
410 uint32 i;
411
412 if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
413 return WERR_ACCESS_DENIED;
414 }
415
416 if (!(W_ERROR_IS_OK(err = fill_value_cache(key)))) {
417 return err;
418 }
419
420 for (i=0; i < regval_ctr_numvals(key->values); i++) {
421 struct regval_blob *blob;
422 blob = regval_ctr_specific_value(key->values, i);
423 if (strequal(regval_name(blob), name)) {
424 /*
425 * don't use reg_enumvalue here:
426 * re-reading the values from the disk
427 * would change the indexing and break
428 * this function.
429 */
430 return reg_enumvalue_nocachefill(mem_ctx, key, i,
431 NULL, pval);
432 }
433 }
434
435 return WERR_BADFILE;
436}
437
438WERROR reg_querymultiplevalues(TALLOC_CTX *mem_ctx,
439 struct registry_key *key,
440 uint32_t num_names,
441 const char **names,
442 uint32_t *pnum_vals,
443 struct registry_value **pvals)
444{
445 WERROR err;
446 uint32_t i, n, found = 0;
447 struct registry_value *vals;
448
449 if (num_names == 0) {
450 return WERR_OK;
451 }
452
453 if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
454 return WERR_ACCESS_DENIED;
455 }
456
457 if (!(W_ERROR_IS_OK(err = fill_value_cache(key)))) {
458 return err;
459 }
460
461 vals = talloc_zero_array(mem_ctx, struct registry_value, num_names);
462 if (vals == NULL) {
463 return WERR_NOMEM;
464 }
465
466 for (n=0; n < num_names; n++) {
467 for (i=0; i < regval_ctr_numvals(key->values); i++) {
468 struct regval_blob *blob;
469 blob = regval_ctr_specific_value(key->values, i);
470 if (strequal(regval_name(blob), names[n])) {
471 struct registry_value *v;
472 err = reg_enumvalue(mem_ctx, key, i, NULL, &v);
473 if (!W_ERROR_IS_OK(err)) {
474 return err;
475 }
476 vals[n] = *v;
477 found++;
478 }
479 }
480 }
481
482 *pvals = vals;
483 *pnum_vals = found;
484
485 return WERR_OK;
486}
487
488WERROR reg_queryinfokey(struct registry_key *key, uint32_t *num_subkeys,
489 uint32_t *max_subkeylen, uint32_t *max_subkeysize,
490 uint32_t *num_values, uint32_t *max_valnamelen,
491 uint32_t *max_valbufsize, uint32_t *secdescsize,
492 NTTIME *last_changed_time)
493{
494 uint32 i, max_size;
495 size_t max_len;
496 TALLOC_CTX *mem_ctx;
497 WERROR err;
498 struct security_descriptor *secdesc;
499
500 if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
501 return WERR_ACCESS_DENIED;
502 }
503
504 if (!W_ERROR_IS_OK(fill_subkey_cache(key)) ||
505 !W_ERROR_IS_OK(fill_value_cache(key))) {
506 return WERR_BADFILE;
507 }
508
509 max_len = 0;
510 for (i=0; i< regsubkey_ctr_numkeys(key->subkeys); i++) {
511 max_len = MAX(max_len,
512 strlen(regsubkey_ctr_specific_key(key->subkeys, i)));
513 }
514
515 *num_subkeys = regsubkey_ctr_numkeys(key->subkeys);
516 *max_subkeylen = max_len;
517 *max_subkeysize = 0; /* Class length? */
518
519 max_len = 0;
520 max_size = 0;
521 for (i=0; i < regval_ctr_numvals(key->values); i++) {
522 struct regval_blob *blob;
523 blob = regval_ctr_specific_value(key->values, i);
524 max_len = MAX(max_len, strlen(regval_name(blob)));
525 max_size = MAX(max_size, regval_size(blob));
526 }
527
528 *num_values = regval_ctr_numvals(key->values);
529 *max_valnamelen = max_len;
530 *max_valbufsize = max_size;
531
532 if (!(mem_ctx = talloc_new(key))) {
533 return WERR_NOMEM;
534 }
535
536 err = regkey_get_secdesc(mem_ctx, key->key, &secdesc);
537 if (!W_ERROR_IS_OK(err)) {
538 TALLOC_FREE(mem_ctx);
539 return err;
540 }
541
542 *secdescsize = ndr_size_security_descriptor(secdesc, 0);
543 TALLOC_FREE(mem_ctx);
544
545 *last_changed_time = 0;
546
547 return WERR_OK;
548}
549
550WERROR reg_createkey(TALLOC_CTX *ctx, struct registry_key *parent,
551 const char *subkeypath, uint32 desired_access,
552 struct registry_key **pkey,
553 enum winreg_CreateAction *paction)
554{
555 struct registry_key *key = parent;
556 struct registry_key *create_parent;
557 TALLOC_CTX *mem_ctx;
558 char *path, *end;
559 WERROR err;
560 uint32_t access_granted;
561
562 mem_ctx = talloc_new(ctx);
563 if (mem_ctx == NULL) {
564 return WERR_NOMEM;
565 }
566
567 path = talloc_strdup(mem_ctx, subkeypath);
568 if (path == NULL) {
569 err = WERR_NOMEM;
570 goto done;
571 }
572
573 err = regdb_transaction_start();
574 if (!W_ERROR_IS_OK(err)) {
575 DEBUG(0, ("reg_createkey: failed to start transaction: %s\n",
576 win_errstr(err)));
577 goto done;
578 }
579
580 while ((end = strchr(path, '\\')) != NULL) {
581 struct registry_key *tmp;
582 enum winreg_CreateAction action;
583
584 *end = '\0';
585
586 err = reg_createkey(mem_ctx, key, path,
587 KEY_ENUMERATE_SUB_KEYS, &tmp, &action);
588 if (!W_ERROR_IS_OK(err)) {
589 goto trans_done;
590 }
591
592 if (key != parent) {
593 TALLOC_FREE(key);
594 }
595
596 key = tmp;
597 path = end+1;
598 }
599
600 /*
601 * At this point, "path" contains the one-element subkey of "key". We
602 * can try to open it.
603 */
604
605 err = reg_openkey(ctx, key, path, desired_access, pkey);
606 if (W_ERROR_IS_OK(err)) {
607 if (paction != NULL) {
608 *paction = REG_OPENED_EXISTING_KEY;
609 }
610 goto trans_done;
611 }
612
613 if (!W_ERROR_EQUAL(err, WERR_BADFILE)) {
614 /*
615 * Something but "notfound" has happened, so bail out
616 */
617 goto trans_done;
618 }
619
620 /*
621 * We may (e.g. in the iteration) have opened the key with ENUM_SUBKEY.
622 * Instead of re-opening the key with CREATE_SUB_KEY, we simply
623 * duplicate the access check here and skip the expensive full open.
624 */
625 if (!regkey_access_check(key->key, KEY_CREATE_SUB_KEY, &access_granted,
626 key->token))
627 {
628 err = WERR_ACCESS_DENIED;
629 goto done;
630 }
631
632 /*
633 * Actually create the subkey
634 */
635
636 err = create_reg_subkey(key->key, path);
637 if (!W_ERROR_IS_OK(err)) {
638 goto trans_done;
639 }
640
641 /*
642 * Now open the newly created key
643 */
644
645 err = reg_openkey(ctx, key, path, desired_access, pkey);
646 if (W_ERROR_IS_OK(err) && (paction != NULL)) {
647 *paction = REG_CREATED_NEW_KEY;
648 }
649
650trans_done:
651 if (W_ERROR_IS_OK(err)) {
652 err = regdb_transaction_commit();
653 if (!W_ERROR_IS_OK(err)) {
654 DEBUG(0, ("reg_createkey: Error committing transaction: %s\n", win_errstr(err)));
655 }
656 } else {
657 WERROR err1 = regdb_transaction_cancel();
658 if (!W_ERROR_IS_OK(err1)) {
659 DEBUG(0, ("reg_createkey: Error cancelling transaction: %s\n", win_errstr(err1)));
660 }
661 }
662
663 done:
664 TALLOC_FREE(mem_ctx);
665 return err;
666}
667
668WERROR reg_deletekey(struct registry_key *parent, const char *path)
669{
670 WERROR err;
671 char *name, *end;
672 struct registry_key *tmp_key, *key;
673 TALLOC_CTX *mem_ctx = talloc_stackframe();
674
675 name = talloc_strdup(mem_ctx, path);
676 if (name == NULL) {
677 err = WERR_NOMEM;
678 goto done;
679 }
680
681 /* check if the key has subkeys */
682 err = reg_openkey(mem_ctx, parent, name, REG_KEY_READ, &key);
683 W_ERROR_NOT_OK_GOTO_DONE(err);
684
685 err = regdb_transaction_start();
686 if (!W_ERROR_IS_OK(err)) {
687 DEBUG(0, ("reg_deletekey: Error starting transaction: %s\n",
688 win_errstr(err)));
689 goto done;
690 }
691
692 err = fill_subkey_cache(key);
693 W_ERROR_NOT_OK_GOTO(err, trans_done);
694
695 if (regsubkey_ctr_numkeys(key->subkeys) > 0) {
696 err = WERR_ACCESS_DENIED;
697 goto trans_done;
698 }
699
700 /* no subkeys - proceed with delete */
701 end = strrchr(name, '\\');
702 if (end != NULL) {
703 *end = '\0';
704
705 err = reg_openkey(mem_ctx, parent, name,
706 KEY_CREATE_SUB_KEY, &tmp_key);
707 W_ERROR_NOT_OK_GOTO(err, trans_done);
708
709 parent = tmp_key;
710 name = end+1;
711 }
712
713 if (name[0] == '\0') {
714 err = WERR_INVALID_PARAM;
715 goto trans_done;
716 }
717
718 err = delete_reg_subkey(parent->key, name);
719
720trans_done:
721 if (W_ERROR_IS_OK(err)) {
722 err = regdb_transaction_commit();
723 if (!W_ERROR_IS_OK(err)) {
724 DEBUG(0, ("reg_deletekey: Error committing transaction: %s\n", win_errstr(err)));
725 }
726 } else {
727 WERROR err1 = regdb_transaction_cancel();
728 if (!W_ERROR_IS_OK(err1)) {
729 DEBUG(0, ("reg_deletekey: Error cancelling transaction: %s\n", win_errstr(err1)));
730 }
731 }
732
733done:
734 TALLOC_FREE(mem_ctx);
735 return err;
736}
737
738WERROR reg_setvalue(struct registry_key *key, const char *name,
739 const struct registry_value *val)
740{
741 struct regval_blob *existing;
742 WERROR err;
743 int res;
744
745 if (!(key->key->access_granted & KEY_SET_VALUE)) {
746 return WERR_ACCESS_DENIED;
747 }
748
749 err = regdb_transaction_start();
750 if (!W_ERROR_IS_OK(err)) {
751 DEBUG(0, ("reg_setvalue: Failed to start transaction: %s\n",
752 win_errstr(err)));
753 return err;
754 }
755
756 err = fill_value_cache(key);
757 if (!W_ERROR_IS_OK(err)) {
758 DEBUG(0, ("reg_setvalue: Error filling value cache: %s\n", win_errstr(err)));
759 goto done;
760 }
761
762 existing = regval_ctr_getvalue(key->values, name);
763
764 if ((existing != NULL) &&
765 (regval_size(existing) == val->data.length) &&
766 (memcmp(regval_data_p(existing), val->data.data,
767 val->data.length) == 0))
768 {
769 err = WERR_OK;
770 goto done;
771 }
772
773 res = regval_ctr_addvalue(key->values, name, val->type,
774 val->data.data, val->data.length);
775
776 if (res == 0) {
777 TALLOC_FREE(key->values);
778 err = WERR_NOMEM;
779 goto done;
780 }
781
782 if (!store_reg_values(key->key, key->values)) {
783 TALLOC_FREE(key->values);
784 DEBUG(0, ("reg_setvalue: store_reg_values failed\n"));
785 err = WERR_REG_IO_FAILURE;
786 goto done;
787 }
788
789 err = WERR_OK;
790
791done:
792 if (W_ERROR_IS_OK(err)) {
793 err = regdb_transaction_commit();
794 if (!W_ERROR_IS_OK(err)) {
795 DEBUG(0, ("reg_setvalue: Error committing transaction: %s\n", win_errstr(err)));
796 }
797 } else {
798 WERROR err1 = regdb_transaction_cancel();
799 if (!W_ERROR_IS_OK(err1)) {
800 DEBUG(0, ("reg_setvalue: Error cancelling transaction: %s\n", win_errstr(err1)));
801 }
802 }
803
804 return err;
805}
806
807static WERROR reg_value_exists(struct registry_key *key, const char *name)
808{
809 struct regval_blob *blob;
810
811 blob = regval_ctr_getvalue(key->values, name);
812
813 if (blob == NULL) {
814 return WERR_BADFILE;
815 } else {
816 return WERR_OK;
817 }
818}
819
820WERROR reg_deletevalue(struct registry_key *key, const char *name)
821{
822 WERROR err;
823
824 if (!(key->key->access_granted & KEY_SET_VALUE)) {
825 return WERR_ACCESS_DENIED;
826 }
827
828 err = regdb_transaction_start();
829 if (!W_ERROR_IS_OK(err)) {
830 DEBUG(0, ("reg_deletevalue: Failed to start transaction: %s\n",
831 win_errstr(err)));
832 return err;
833 }
834
835 err = fill_value_cache(key);
836 if (!W_ERROR_IS_OK(err)) {
837 DEBUG(0, ("reg_deletevalue; Error filling value cache: %s\n",
838 win_errstr(err)));
839 goto done;
840 }
841
842 err = reg_value_exists(key, name);
843 if (!W_ERROR_IS_OK(err)) {
844 goto done;
845 }
846
847 regval_ctr_delvalue(key->values, name);
848
849 if (!store_reg_values(key->key, key->values)) {
850 TALLOC_FREE(key->values);
851 err = WERR_REG_IO_FAILURE;
852 DEBUG(0, ("reg_deletevalue: store_reg_values failed\n"));
853 goto done;
854 }
855
856 err = WERR_OK;
857
858done:
859 if (W_ERROR_IS_OK(err)) {
860 err = regdb_transaction_commit();
861 if (!W_ERROR_IS_OK(err)) {
862 DEBUG(0, ("reg_deletevalue: Error committing transaction: %s\n", win_errstr(err)));
863 }
864 } else {
865 WERROR err1 = regdb_transaction_cancel();
866 if (!W_ERROR_IS_OK(err1)) {
867 DEBUG(0, ("reg_deletevalue: Error cancelling transaction: %s\n", win_errstr(err1)));
868 }
869 }
870
871 return err;
872}
873
874WERROR reg_getkeysecurity(TALLOC_CTX *mem_ctx, struct registry_key *key,
875 struct security_descriptor **psecdesc)
876{
877 return regkey_get_secdesc(mem_ctx, key->key, psecdesc);
878}
879
880WERROR reg_setkeysecurity(struct registry_key *key,
881 struct security_descriptor *psecdesc)
882{
883 return regkey_set_secdesc(key->key, psecdesc);
884}
885
886WERROR reg_getversion(uint32_t *version)
887{
888 if (version == NULL) {
889 return WERR_INVALID_PARAM;
890 }
891
892 *version = 0x00000005; /* Windows 2000 registry API version */
893 return WERR_OK;
894}
895
896/**********************************************************************
897 * Higher level utility functions
898 **********************************************************************/
899
900WERROR reg_deleteallvalues(struct registry_key *key)
901{
902 WERROR err;
903 int i;
904
905 if (!(key->key->access_granted & KEY_SET_VALUE)) {
906 return WERR_ACCESS_DENIED;
907 }
908
909 if (!W_ERROR_IS_OK(err = fill_value_cache(key))) {
910 return err;
911 }
912
913 for (i=0; i < regval_ctr_numvals(key->values); i++) {
914 struct regval_blob *blob;
915 blob = regval_ctr_specific_value(key->values, i);
916 regval_ctr_delvalue(key->values, regval_name(blob));
917 }
918
919 if (!store_reg_values(key->key, key->values)) {
920 TALLOC_FREE(key->values);
921 return WERR_REG_IO_FAILURE;
922 }
923
924 return WERR_OK;
925}
926
927/*
928 * Utility function to delete a registry key with all its subkeys.
929 * Note that reg_deletekey returns ACCESS_DENIED when called on a
930 * key that has subkeys.
931 */
932static WERROR reg_deletekey_recursive_internal(struct registry_key *parent,
933 const char *path,
934 bool del_key)
935{
936 WERROR werr = WERR_OK;
937 struct registry_key *key;
938 char *subkey_name = NULL;
939 uint32 i;
940 TALLOC_CTX *mem_ctx = talloc_stackframe();
941
942 /* recurse through subkeys first */
943 werr = reg_openkey(mem_ctx, parent, path, REG_KEY_ALL, &key);
944 if (!W_ERROR_IS_OK(werr)) {
945 goto done;
946 }
947
948 werr = fill_subkey_cache(key);
949 W_ERROR_NOT_OK_GOTO_DONE(werr);
950
951 /*
952 * loop from top to bottom for perfomance:
953 * this way, we need to rehash the regsubkey containers less
954 */
955 for (i = regsubkey_ctr_numkeys(key->subkeys) ; i > 0; i--) {
956 subkey_name = regsubkey_ctr_specific_key(key->subkeys, i-1);
957 werr = reg_deletekey_recursive_internal(key, subkey_name, true);
958 W_ERROR_NOT_OK_GOTO_DONE(werr);
959 }
960
961 if (del_key) {
962 /* now delete the actual key */
963 werr = reg_deletekey(parent, path);
964 }
965
966done:
967 TALLOC_FREE(mem_ctx);
968 return werr;
969}
970
971static WERROR reg_deletekey_recursive_trans(struct registry_key *parent,
972 const char *path,
973 bool del_key)
974{
975 WERROR werr;
976
977 werr = regdb_transaction_start();
978 if (!W_ERROR_IS_OK(werr)) {
979 DEBUG(0, ("reg_deletekey_recursive_trans: "
980 "error starting transaction: %s\n",
981 win_errstr(werr)));
982 return werr;
983 }
984
985 werr = reg_deletekey_recursive_internal(parent, path, del_key);
986
987 if (!W_ERROR_IS_OK(werr)) {
988 WERROR werr2;
989
990 DEBUG(1, (__location__ " failed to delete key '%s' from key "
991 "'%s': %s\n", path, parent->key->name,
992 win_errstr(werr)));
993
994 werr2 = regdb_transaction_cancel();
995 if (!W_ERROR_IS_OK(werr2)) {
996 DEBUG(0, ("reg_deletekey_recursive_trans: "
997 "error cancelling transaction: %s\n",
998 win_errstr(werr2)));
999 /*
1000 * return the original werr or the
1001 * error from cancelling the transaction?
1002 */
1003 }
1004 } else {
1005 werr = regdb_transaction_commit();
1006 if (!W_ERROR_IS_OK(werr)) {
1007 DEBUG(0, ("reg_deletekey_recursive_trans: "
1008 "error committing transaction: %s\n",
1009 win_errstr(werr)));
1010 }
1011 }
1012
1013 return werr;
1014}
1015
1016WERROR reg_deletekey_recursive(struct registry_key *parent,
1017 const char *path)
1018{
1019 return reg_deletekey_recursive_trans(parent, path, true);
1020}
1021
1022WERROR reg_deletesubkeys_recursive(struct registry_key *parent,
1023 const char *path)
1024{
1025 return reg_deletekey_recursive_trans(parent, path, false);
1026}
1027
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