source: vendor/3.6.9/source4/lib/registry/ldb.c

Last change on this file was 740, checked in by Silvan Scherrer, 13 years ago

Samba Server: update vendor to 3.6.0
File size: 24.5 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Registry interface
4 Copyright (C) 2004-2007, Jelmer Vernooij, jelmer@samba.org
5 Copyright (C) 2008-2010, Matthias Dieter Wallnöfer, mdw@samba.org
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#include "includes.h"
22#include "registry.h"
23#include <ldb.h>
24#include <ldb_errors.h>
25#include "ldb_wrap.h"
26#include "librpc/gen_ndr/winreg.h"
27#include "param/param.h"
28
29static struct hive_operations reg_backend_ldb;
30
31struct ldb_key_data
32{
33 struct hive_key key;
34 struct ldb_context *ldb;
35 struct ldb_dn *dn;
36 struct ldb_message **subkeys, **values;
37 unsigned int subkey_count, value_count;
38 const char *classname;
39};
40
41static void reg_ldb_unpack_value(TALLOC_CTX *mem_ctx,
42 struct ldb_message *msg,
43 const char **name, uint32_t *type,
44 DATA_BLOB *data)
45{
46 const struct ldb_val *val;
47 uint32_t value_type;
48
49 if (name != NULL) {
50 *name = talloc_strdup(mem_ctx,
51 ldb_msg_find_attr_as_string(msg, "value",
52 ""));
53 }
54
55 value_type = ldb_msg_find_attr_as_uint(msg, "type", 0);
56 *type = value_type;
57
58 val = ldb_msg_find_ldb_val(msg, "data");
59
60 switch (value_type)
61 {
62 case REG_SZ:
63 case REG_EXPAND_SZ:
64 if (val != NULL) {
65 /* The data should be provided as UTF16 string */
66 convert_string_talloc(mem_ctx, CH_UTF8, CH_UTF16,
67 val->data, val->length,
68 (void **)&data->data, &data->length, false);
69 } else {
70 data->data = NULL;
71 data->length = 0;
72 }
73 break;
74
75 case REG_DWORD:
76 case REG_DWORD_BIG_ENDIAN:
77 if (val != NULL) {
78 /* The data is a plain DWORD */
79 uint32_t tmp = strtoul((char *)val->data, NULL, 0);
80 data->data = talloc_size(mem_ctx, sizeof(uint32_t));
81 if (data->data != NULL) {
82 SIVAL(data->data, 0, tmp);
83 }
84 data->length = sizeof(uint32_t);
85 } else {
86 data->data = NULL;
87 data->length = 0;
88 }
89 break;
90
91 case REG_QWORD:
92 if (val != NULL) {
93 /* The data is a plain QWORD */
94 uint64_t tmp = strtoull((char *)val->data, NULL, 0);
95 data->data = talloc_size(mem_ctx, sizeof(uint64_t));
96 if (data->data != NULL) {
97 SBVAL(data->data, 0, tmp);
98 }
99 data->length = sizeof(uint64_t);
100 } else {
101 data->data = NULL;
102 data->length = 0;
103 }
104 break;
105
106 case REG_BINARY:
107 default:
108 if (val != NULL) {
109 data->data = talloc_memdup(mem_ctx, val->data,
110 val->length);
111 data->length = val->length;
112 } else {
113 data->data = NULL;
114 data->length = 0;
115 }
116 break;
117 }
118}
119
120static struct ldb_message *reg_ldb_pack_value(struct ldb_context *ctx,
121 TALLOC_CTX *mem_ctx,
122 const char *name,
123 uint32_t type, DATA_BLOB data)
124{
125 struct ldb_message *msg;
126 char *name_dup, *type_str;
127 int ret;
128
129 msg = talloc_zero(mem_ctx, struct ldb_message);
130 if (msg == NULL) {
131 return NULL;
132 }
133
134 name_dup = talloc_strdup(msg, name);
135 if (name_dup == NULL) {
136 talloc_free(msg);
137 return NULL;
138 }
139
140 ret = ldb_msg_add_string(msg, "value", name_dup);
141 if (ret != LDB_SUCCESS) {
142 talloc_free(msg);
143 return NULL;
144 }
145
146 switch (type) {
147 case REG_SZ:
148 case REG_EXPAND_SZ:
149 if ((data.length > 0) && (data.data != NULL)) {
150 struct ldb_val *val;
151 bool ret2 = false;
152
153 val = talloc_zero(msg, struct ldb_val);
154 if (val == NULL) {
155 talloc_free(msg);
156 return NULL;
157 }
158
159 /* The data is provided as UTF16 string */
160 ret2 = convert_string_talloc(mem_ctx, CH_UTF16, CH_UTF8,
161 (void *)data.data, data.length,
162 (void **)&val->data, &val->length,
163 false);
164 if (ret2) {
165 ret = ldb_msg_add_value(msg, "data", val, NULL);
166 } else {
167 /* workaround for non-standard data */
168 ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
169 }
170 } else {
171 ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
172 }
173 break;
174
175 case REG_DWORD:
176 case REG_DWORD_BIG_ENDIAN:
177 if ((data.length > 0) && (data.data != NULL)) {
178 if (data.length == sizeof(uint32_t)) {
179 char *conv_str;
180
181 conv_str = talloc_asprintf(msg, "0x%8.8x",
182 IVAL(data.data, 0));
183 if (conv_str == NULL) {
184 talloc_free(msg);
185 return NULL;
186 }
187 ret = ldb_msg_add_string(msg, "data", conv_str);
188 } else {
189 /* workaround for non-standard data */
190 talloc_free(msg);
191 return NULL;
192 }
193 } else {
194 ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
195 }
196 break;
197
198 case REG_QWORD:
199 if ((data.length > 0) && (data.data != NULL)) {
200 if (data.length == sizeof(uint64_t)) {
201 char *conv_str;
202
203 conv_str = talloc_asprintf(msg, "0x%16.16llx",
204 (unsigned long long)BVAL(data.data, 0));
205 if (conv_str == NULL) {
206 talloc_free(msg);
207 return NULL;
208 }
209 ret = ldb_msg_add_string(msg, "data", conv_str);
210 } else {
211 /* workaround for non-standard data */
212 talloc_free(msg);
213 return NULL;
214
215 }
216 } else {
217 ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
218 }
219 break;
220
221 case REG_BINARY:
222 default:
223 if ((data.length > 0) && (data.data != NULL)) {
224 ret = ldb_msg_add_value(msg, "data", &data, NULL);
225 } else {
226 ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
227 }
228 break;
229 }
230
231 if (ret != LDB_SUCCESS) {
232 talloc_free(msg);
233 return NULL;
234 }
235
236 type_str = talloc_asprintf(mem_ctx, "%u", type);
237 if (type_str == NULL) {
238 talloc_free(msg);
239 return NULL;
240 }
241
242 ret = ldb_msg_add_string(msg, "type", type_str);
243 if (ret != LDB_SUCCESS) {
244 talloc_free(msg);
245 return NULL;
246 }
247
248 return msg;
249}
250
251static char *reg_ldb_escape(TALLOC_CTX *mem_ctx, const char *value)
252{
253 struct ldb_val val;
254
255 val.data = discard_const_p(uint8_t, value);
256 val.length = strlen(value);
257
258 return ldb_dn_escape_value(mem_ctx, val);
259}
260
261static int reg_close_ldb_key(struct ldb_key_data *key)
262{
263 if (key->subkeys != NULL) {
264 talloc_free(key->subkeys);
265 key->subkeys = NULL;
266 }
267
268 if (key->values != NULL) {
269 talloc_free(key->values);
270 key->values = NULL;
271 }
272 return 0;
273}
274
275static struct ldb_dn *reg_path_to_ldb(TALLOC_CTX *mem_ctx,
276 const struct hive_key *from,
277 const char *path, const char *add)
278{
279 struct ldb_dn *ret;
280 char *mypath;
281 char *begin;
282 struct ldb_key_data *kd = talloc_get_type(from, struct ldb_key_data);
283 struct ldb_context *ldb = kd->ldb;
284
285 mypath = talloc_strdup(mem_ctx, path);
286 if (mypath == NULL) {
287 return NULL;
288 }
289
290 ret = ldb_dn_new(mem_ctx, ldb, add);
291 if (!ldb_dn_validate(ret)) {
292 talloc_free(ret);
293 return NULL;
294 }
295
296 if (!ldb_dn_add_base(ret, kd->dn)) {
297 talloc_free(ret);
298 return NULL;
299 }
300
301 while (mypath[0] != '\0') {
302 begin = strchr(mypath, '\\');
303 if (begin != NULL) {
304 *begin = '\0';
305 }
306
307 if (!ldb_dn_add_child_fmt(ret, "key=%s",
308 reg_ldb_escape(mem_ctx, mypath))) {
309 talloc_free(ret);
310 return NULL;
311 }
312
313 if (begin != NULL) {
314 mypath = begin + 1;
315 } else {
316 break;
317 }
318 }
319
320 return ret;
321}
322
323static WERROR cache_subkeys(struct ldb_key_data *kd)
324{
325 struct ldb_context *c = kd->ldb;
326 struct ldb_result *res;
327 int ret;
328
329 ret = ldb_search(c, c, &res, kd->dn, LDB_SCOPE_ONELEVEL,
330 NULL, "(key=*)");
331 if (ret != LDB_SUCCESS) {
332 DEBUG(0, ("Error getting subkeys for '%s': %s\n",
333 ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
334 return WERR_FOOBAR;
335 }
336
337 kd->subkey_count = res->count;
338 kd->subkeys = talloc_steal(kd, res->msgs);
339 talloc_free(res);
340
341 return WERR_OK;
342}
343
344static WERROR cache_values(struct ldb_key_data *kd)
345{
346 struct ldb_context *c = kd->ldb;
347 struct ldb_result *res;
348 int ret;
349
350 ret = ldb_search(c, c, &res, kd->dn, LDB_SCOPE_ONELEVEL,
351 NULL, "(value=*)");
352 if (ret != LDB_SUCCESS) {
353 DEBUG(0, ("Error getting values for '%s': %s\n",
354 ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
355 return WERR_FOOBAR;
356 }
357
358 kd->value_count = res->count;
359 kd->values = talloc_steal(kd, res->msgs);
360 talloc_free(res);
361
362 return WERR_OK;
363}
364
365
366static WERROR ldb_get_subkey_by_id(TALLOC_CTX *mem_ctx,
367 const struct hive_key *k, uint32_t idx,
368 const char **name,
369 const char **classname,
370 NTTIME *last_mod_time)
371{
372 struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
373
374 /* Initialization */
375 if (name != NULL)
376 *name = NULL;
377 if (classname != NULL)
378 *classname = NULL;
379 if (last_mod_time != NULL)
380 *last_mod_time = 0; /* TODO: we need to add this to the
381 ldb backend properly */
382
383 /* Do a search if necessary */
384 if (kd->subkeys == NULL) {
385 W_ERROR_NOT_OK_RETURN(cache_subkeys(kd));
386 }
387
388 if (idx >= kd->subkey_count)
389 return WERR_NO_MORE_ITEMS;
390
391 if (name != NULL)
392 *name = talloc_strdup(mem_ctx,
393 ldb_msg_find_attr_as_string(kd->subkeys[idx], "key", NULL));
394 if (classname != NULL)
395 *classname = talloc_strdup(mem_ctx,
396 ldb_msg_find_attr_as_string(kd->subkeys[idx], "classname", NULL));
397
398 return WERR_OK;
399}
400
401static WERROR ldb_get_default_value(TALLOC_CTX *mem_ctx,
402 const struct hive_key *k,
403 const char **name, uint32_t *data_type,
404 DATA_BLOB *data)
405{
406 struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
407 struct ldb_context *c = kd->ldb;
408 const char* attrs[] = { "data", "type", NULL };
409 struct ldb_result *res;
410 int ret;
411
412 ret = ldb_search(c, mem_ctx, &res, kd->dn, LDB_SCOPE_BASE, attrs, "(dn=*)");
413
414 if (ret != LDB_SUCCESS) {
415 DEBUG(0, ("Error getting default value for '%s': %s\n",
416 ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
417 return WERR_FOOBAR;
418 }
419
420 if (res->count == 0 || res->msgs[0]->num_elements == 0) {
421 talloc_free(res);
422 return WERR_BADFILE;
423 }
424
425 if ((data_type != NULL) && (data != NULL)) {
426 reg_ldb_unpack_value(mem_ctx, res->msgs[0], name, data_type,
427 data);
428 }
429
430 talloc_free(res);
431
432 return WERR_OK;
433}
434
435static WERROR ldb_get_value_by_id(TALLOC_CTX *mem_ctx, struct hive_key *k,
436 uint32_t idx, const char **name,
437 uint32_t *data_type, DATA_BLOB *data)
438{
439 struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
440
441 /* if the default value exists, give it back */
442 if (W_ERROR_IS_OK(ldb_get_default_value(mem_ctx, k, name, data_type,
443 data))) {
444 if (idx == 0)
445 return WERR_OK;
446 else
447 --idx;
448 }
449
450 /* Do the search if necessary */
451 if (kd->values == NULL) {
452 W_ERROR_NOT_OK_RETURN(cache_values(kd));
453 }
454
455 if (idx >= kd->value_count)
456 return WERR_NO_MORE_ITEMS;
457
458 reg_ldb_unpack_value(mem_ctx, kd->values[idx], name, data_type, data);
459
460 return WERR_OK;
461}
462
463static WERROR ldb_get_value(TALLOC_CTX *mem_ctx, struct hive_key *k,
464 const char *name, uint32_t *data_type,
465 DATA_BLOB *data)
466{
467 struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
468 const char *res_name;
469 uint32_t idx;
470
471 /* the default value was requested, give it back */
472 if (name[0] == '\0') {
473 return ldb_get_default_value(mem_ctx, k, NULL, data_type, data);
474 }
475
476 /* Do the search if necessary */
477 if (kd->values == NULL) {
478 W_ERROR_NOT_OK_RETURN(cache_values(kd));
479 }
480
481 for (idx = 0; idx < kd->value_count; idx++) {
482 res_name = ldb_msg_find_attr_as_string(kd->values[idx], "value",
483 "");
484 if (ldb_attr_cmp(name, res_name) == 0) {
485 reg_ldb_unpack_value(mem_ctx, kd->values[idx], NULL,
486 data_type, data);
487 return WERR_OK;
488 }
489 }
490
491 return WERR_BADFILE;
492}
493
494static WERROR ldb_open_key(TALLOC_CTX *mem_ctx, const struct hive_key *h,
495 const char *name, struct hive_key **key)
496{
497 struct ldb_result *res;
498 struct ldb_dn *ldb_path;
499 int ret;
500 struct ldb_key_data *newkd;
501 struct ldb_key_data *kd = talloc_get_type(h, struct ldb_key_data);
502 struct ldb_context *c = kd->ldb;
503
504 ldb_path = reg_path_to_ldb(mem_ctx, h, name, NULL);
505 W_ERROR_HAVE_NO_MEMORY(ldb_path);
506
507 ret = ldb_search(c, mem_ctx, &res, ldb_path, LDB_SCOPE_BASE, NULL, "(key=*)");
508
509 if (ret != LDB_SUCCESS) {
510 DEBUG(3, ("Error opening key '%s': %s\n",
511 ldb_dn_get_linearized(ldb_path), ldb_errstring(c)));
512 return WERR_FOOBAR;
513 } else if (res->count == 0) {
514 DEBUG(3, ("Key '%s' not found\n",
515 ldb_dn_get_linearized(ldb_path)));
516 talloc_free(res);
517 return WERR_BADFILE;
518 }
519
520 newkd = talloc_zero(mem_ctx, struct ldb_key_data);
521 W_ERROR_HAVE_NO_MEMORY(newkd);
522 newkd->key.ops = &reg_backend_ldb;
523 newkd->ldb = talloc_reference(newkd, kd->ldb);
524 newkd->dn = ldb_dn_copy(newkd, res->msgs[0]->dn);
525 newkd->classname = talloc_steal(newkd,
526 ldb_msg_find_attr_as_string(res->msgs[0], "classname", NULL));
527
528 talloc_free(res);
529
530 *key = (struct hive_key *)newkd;
531
532 return WERR_OK;
533}
534
535WERROR reg_open_ldb_file(TALLOC_CTX *parent_ctx, const char *location,
536 struct auth_session_info *session_info,
537 struct cli_credentials *credentials,
538 struct tevent_context *ev_ctx,
539 struct loadparm_context *lp_ctx,
540 struct hive_key **k)
541{
542 struct ldb_key_data *kd;
543 struct ldb_context *wrap;
544 struct ldb_message *attrs_msg;
545
546 if (location == NULL)
547 return WERR_INVALID_PARAM;
548
549 wrap = ldb_wrap_connect(parent_ctx, ev_ctx, lp_ctx,
550 location, session_info, credentials, 0);
551
552 if (wrap == NULL) {
553 DEBUG(1, (__FILE__": unable to connect\n"));
554 return WERR_FOOBAR;
555 }
556
557 attrs_msg = ldb_msg_new(wrap);
558 W_ERROR_HAVE_NO_MEMORY(attrs_msg);
559 attrs_msg->dn = ldb_dn_new(attrs_msg, wrap, "@ATTRIBUTES");
560 W_ERROR_HAVE_NO_MEMORY(attrs_msg->dn);
561 ldb_msg_add_string(attrs_msg, "key", "CASE_INSENSITIVE");
562 ldb_msg_add_string(attrs_msg, "value", "CASE_INSENSITIVE");
563
564 ldb_add(wrap, attrs_msg);
565
566 ldb_set_debug_stderr(wrap);
567
568 kd = talloc_zero(parent_ctx, struct ldb_key_data);
569 kd->key.ops = &reg_backend_ldb;
570 kd->ldb = talloc_reference(kd, wrap);
571 talloc_set_destructor (kd, reg_close_ldb_key);
572 kd->dn = ldb_dn_new(kd, wrap, "hive=NONE");
573
574 *k = (struct hive_key *)kd;
575
576 return WERR_OK;
577}
578
579static WERROR ldb_add_key(TALLOC_CTX *mem_ctx, const struct hive_key *parent,
580 const char *name, const char *classname,
581 struct security_descriptor *sd,
582 struct hive_key **newkey)
583{
584 struct ldb_key_data *parentkd = discard_const_p(struct ldb_key_data, parent);
585 struct ldb_dn *ldb_path;
586 struct ldb_message *msg;
587 struct ldb_key_data *newkd;
588 int ret;
589
590 ldb_path = reg_path_to_ldb(mem_ctx, parent, name, NULL);
591 W_ERROR_HAVE_NO_MEMORY(ldb_path);
592
593 msg = ldb_msg_new(mem_ctx);
594 W_ERROR_HAVE_NO_MEMORY(msg);
595
596 msg->dn = ldb_path;
597
598 ldb_msg_add_string(msg, "key", name);
599 if (classname != NULL) {
600 ldb_msg_add_string(msg, "classname", classname);
601 }
602
603 ret = ldb_add(parentkd->ldb, msg);
604
605 talloc_free(msg);
606
607 if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
608 return WERR_ALREADY_EXISTS;
609 }
610
611 if (ret != LDB_SUCCESS) {
612 DEBUG(1, ("ldb_add: %s\n", ldb_errstring(parentkd->ldb)));
613 return WERR_FOOBAR;
614 }
615
616 DEBUG(2, ("key added: %s\n", ldb_dn_get_linearized(ldb_path)));
617
618 newkd = talloc_zero(mem_ctx, struct ldb_key_data);
619 W_ERROR_HAVE_NO_MEMORY(newkd);
620 newkd->ldb = talloc_reference(newkd, parentkd->ldb);
621 newkd->key.ops = &reg_backend_ldb;
622 newkd->dn = talloc_steal(newkd, ldb_path);
623 newkd->classname = talloc_steal(newkd, classname);
624
625 *newkey = (struct hive_key *)newkd;
626
627 /* reset cache */
628 talloc_free(parentkd->subkeys);
629 parentkd->subkeys = NULL;
630
631 return WERR_OK;
632}
633
634static WERROR ldb_del_value(TALLOC_CTX *mem_ctx, struct hive_key *key,
635 const char *child)
636{
637 int ret;
638 struct ldb_key_data *kd = talloc_get_type(key, struct ldb_key_data);
639 struct ldb_message *msg;
640 struct ldb_dn *childdn;
641
642 if (child[0] == '\0') {
643 /* default value */
644 msg = talloc_zero(mem_ctx, struct ldb_message);
645 W_ERROR_HAVE_NO_MEMORY(msg);
646 msg->dn = ldb_dn_copy(msg, kd->dn);
647 W_ERROR_HAVE_NO_MEMORY(msg->dn);
648 ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
649 ldb_msg_add_empty(msg, "type", LDB_FLAG_MOD_DELETE, NULL);
650
651 ret = ldb_modify(kd->ldb, msg);
652
653 talloc_free(msg);
654
655 if (ret != LDB_SUCCESS) {
656 DEBUG(1, ("ldb_del_value: %s\n", ldb_errstring(kd->ldb)));
657 return WERR_FOOBAR;
658 }
659 } else {
660 /* normal value */
661 childdn = ldb_dn_copy(kd->ldb, kd->dn);
662 if (!ldb_dn_add_child_fmt(childdn, "value=%s",
663 reg_ldb_escape(childdn, child)))
664 {
665 talloc_free(childdn);
666 return WERR_FOOBAR;
667 }
668
669 ret = ldb_delete(kd->ldb, childdn);
670
671 talloc_free(childdn);
672
673 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
674 return WERR_BADFILE;
675 } else if (ret != LDB_SUCCESS) {
676 DEBUG(1, ("ldb_del_value: %s\n", ldb_errstring(kd->ldb)));
677 return WERR_FOOBAR;
678 }
679 }
680
681 /* reset cache */
682 talloc_free(kd->values);
683 kd->values = NULL;
684
685 return WERR_OK;
686}
687
688static WERROR ldb_del_key(TALLOC_CTX *mem_ctx, const struct hive_key *key,
689 const char *name)
690{
691 unsigned int i;
692 int ret;
693 struct ldb_key_data *parentkd = talloc_get_type(key, struct ldb_key_data);
694 struct ldb_dn *ldb_path;
695 struct ldb_context *c = parentkd->ldb;
696 struct ldb_result *res_keys;
697 struct ldb_result *res_vals;
698 WERROR werr;
699 struct hive_key *hk;
700
701 /* Verify key exists by opening it */
702 werr = ldb_open_key(mem_ctx, key, name, &hk);
703 if (!W_ERROR_IS_OK(werr)) {
704 return werr;
705 }
706
707 ldb_path = reg_path_to_ldb(mem_ctx, key, name, NULL);
708 W_ERROR_HAVE_NO_MEMORY(ldb_path);
709
710 /* Search for subkeys */
711 ret = ldb_search(c, mem_ctx, &res_keys, ldb_path, LDB_SCOPE_ONELEVEL,
712 NULL, "(key=*)");
713
714 if (ret != LDB_SUCCESS) {
715 DEBUG(0, ("Error getting subkeys for '%s': %s\n",
716 ldb_dn_get_linearized(ldb_path), ldb_errstring(c)));
717 return WERR_FOOBAR;
718 }
719
720 /* Search for values */
721 ret = ldb_search(c, mem_ctx, &res_vals, ldb_path, LDB_SCOPE_ONELEVEL,
722 NULL, "(value=*)");
723
724 if (ret != LDB_SUCCESS) {
725 DEBUG(0, ("Error getting values for '%s': %s\n",
726 ldb_dn_get_linearized(ldb_path), ldb_errstring(c)));
727 return WERR_FOOBAR;
728 }
729
730 /* Start an explicit transaction */
731 ret = ldb_transaction_start(c);
732
733 if (ret != LDB_SUCCESS) {
734 DEBUG(0, ("ldb_transaction_start: %s\n", ldb_errstring(c)));
735 return WERR_FOOBAR;
736 }
737
738 if (res_keys->count || res_vals->count)
739 {
740 /* Delete any subkeys */
741 for (i = 0; i < res_keys->count; i++)
742 {
743 werr = ldb_del_key(mem_ctx, hk,
744 ldb_msg_find_attr_as_string(
745 res_keys->msgs[i],
746 "key", NULL));
747 if (!W_ERROR_IS_OK(werr)) {
748 ret = ldb_transaction_cancel(c);
749 return werr;
750 }
751 }
752
753 /* Delete any values */
754 for (i = 0; i < res_vals->count; i++)
755 {
756 werr = ldb_del_value(mem_ctx, hk,
757 ldb_msg_find_attr_as_string(
758 res_vals->msgs[i],
759 "value", NULL));
760 if (!W_ERROR_IS_OK(werr)) {
761 ret = ldb_transaction_cancel(c);
762 return werr;
763 }
764 }
765 }
766 talloc_free(res_keys);
767 talloc_free(res_vals);
768
769 /* Delete the key itself */
770 ret = ldb_delete(c, ldb_path);
771
772 if (ret != LDB_SUCCESS)
773 {
774 DEBUG(1, ("ldb_del_key: %s\n", ldb_errstring(c)));
775 ret = ldb_transaction_cancel(c);
776 return WERR_FOOBAR;
777 }
778
779 /* Commit the transaction */
780 ret = ldb_transaction_commit(c);
781
782 if (ret != LDB_SUCCESS)
783 {
784 DEBUG(0, ("ldb_transaction_commit: %s\n", ldb_errstring(c)));
785 ret = ldb_transaction_cancel(c);
786 return WERR_FOOBAR;
787 }
788
789 /* reset cache */
790 talloc_free(parentkd->subkeys);
791 parentkd->subkeys = NULL;
792
793 return WERR_OK;
794}
795
796static WERROR ldb_set_value(struct hive_key *parent,
797 const char *name, uint32_t type,
798 const DATA_BLOB data)
799{
800 struct ldb_message *msg;
801 struct ldb_key_data *kd = talloc_get_type(parent, struct ldb_key_data);
802 unsigned int i;
803 int ret;
804 TALLOC_CTX *mem_ctx = talloc_init("ldb_set_value");
805
806 msg = reg_ldb_pack_value(kd->ldb, mem_ctx, name, type, data);
807 W_ERROR_HAVE_NO_MEMORY(msg);
808
809 msg->dn = ldb_dn_copy(msg, kd->dn);
810 W_ERROR_HAVE_NO_MEMORY(msg->dn);
811
812 if (name[0] != '\0') {
813 /* For a default value, we add/overwrite the attributes to/of the hive.
814 For a normal value, we create a new child. */
815 if (!ldb_dn_add_child_fmt(msg->dn, "value=%s",
816 reg_ldb_escape(mem_ctx, name)))
817 {
818 talloc_free(mem_ctx);
819 return WERR_FOOBAR;
820 }
821 }
822
823 /* Try first a "modify" and if this doesn't work do try an "add" */
824 for (i = 0; i < msg->num_elements; i++) {
825 if (msg->elements[i].flags != LDB_FLAG_MOD_DELETE) {
826 msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
827 }
828 }
829 ret = ldb_modify(kd->ldb, msg);
830 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
831 i = 0;
832 while (i < msg->num_elements) {
833 if (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) == LDB_FLAG_MOD_DELETE) {
834 ldb_msg_remove_element(msg, &msg->elements[i]);
835 } else {
836 ++i;
837 }
838 }
839 ret = ldb_add(kd->ldb, msg);
840 }
841 if (ret == LDB_ERR_NO_SUCH_ATTRIBUTE) {
842 /* ignore this -> the value didn't exist and also now doesn't */
843 ret = LDB_SUCCESS;
844 }
845
846 talloc_free(msg);
847
848 if (ret != LDB_SUCCESS) {
849 DEBUG(1, ("ldb_set_value: %s\n", ldb_errstring(kd->ldb)));
850 talloc_free(mem_ctx);
851 return WERR_FOOBAR;
852 }
853
854 /* reset cache */
855 talloc_free(kd->values);
856 kd->values = NULL;
857
858 talloc_free(mem_ctx);
859 return WERR_OK;
860}
861
862static WERROR ldb_get_key_info(TALLOC_CTX *mem_ctx,
863 const struct hive_key *key,
864 const char **classname,
865 uint32_t *num_subkeys,
866 uint32_t *num_values,
867 NTTIME *last_change_time,
868 uint32_t *max_subkeynamelen,
869 uint32_t *max_valnamelen,
870 uint32_t *max_valbufsize)
871{
872 struct ldb_key_data *kd = talloc_get_type(key, struct ldb_key_data);
873 uint32_t default_value_type = REG_NONE;
874 DATA_BLOB default_value = { NULL, 0 };
875 WERROR werr;
876
877 /* Initialization */
878 if (classname != NULL)
879 *classname = NULL;
880 if (num_subkeys != NULL)
881 *num_subkeys = 0;
882 if (num_values != NULL)
883 *num_values = 0;
884 if (last_change_time != NULL)
885 *last_change_time = 0;
886 if (max_subkeynamelen != NULL)
887 *max_subkeynamelen = 0;
888 if (max_valnamelen != NULL)
889 *max_valnamelen = 0;
890 if (max_valbufsize != NULL)
891 *max_valbufsize = 0;
892
893 /* We need this to get the default value (if it exists) for counting
894 * the values under the key and for finding out the longest value buffer
895 * size. If no default value exists the DATA_BLOB "default_value" will
896 * remain { NULL, 0 }. */
897 werr = ldb_get_default_value(mem_ctx, key, NULL, &default_value_type,
898 &default_value);
899 if ((!W_ERROR_IS_OK(werr)) && (!W_ERROR_EQUAL(werr, WERR_BADFILE))) {
900 return werr;
901 }
902
903 if (kd->subkeys == NULL) {
904 W_ERROR_NOT_OK_RETURN(cache_subkeys(kd));
905 }
906 if (kd->values == NULL) {
907 W_ERROR_NOT_OK_RETURN(cache_values(kd));
908 }
909
910 if (classname != NULL) {
911 *classname = kd->classname;
912 }
913
914 if (num_subkeys != NULL) {
915 *num_subkeys = kd->subkey_count;
916 }
917 if (num_values != NULL) {
918 *num_values = kd->value_count;
919 /* also consider the default value if it exists */
920 if (default_value.data != NULL) {
921 ++(*num_values);
922 }
923 }
924
925
926 if (max_subkeynamelen != NULL) {
927 unsigned int i;
928 struct ldb_message_element *el;
929
930 for (i = 0; i < kd->subkey_count; i++) {
931 el = ldb_msg_find_element(kd->subkeys[i], "key");
932 *max_subkeynamelen = MAX(*max_subkeynamelen, el->values[0].length);
933 }
934 }
935
936 if (max_valnamelen != NULL || max_valbufsize != NULL) {
937 unsigned int i;
938 struct ldb_message_element *el;
939 W_ERROR_NOT_OK_RETURN(cache_values(kd));
940
941 /* also consider the default value if it exists */
942 if ((max_valbufsize != NULL) && (default_value.data != NULL)) {
943 *max_valbufsize = MAX(*max_valbufsize,
944 default_value.length);
945 }
946
947 for (i = 0; i < kd->value_count; i++) {
948 if (max_valnamelen != NULL) {
949 el = ldb_msg_find_element(kd->values[i], "value");
950 *max_valnamelen = MAX(*max_valnamelen, el->values[0].length);
951 }
952
953 if (max_valbufsize != NULL) {
954 uint32_t data_type;
955 DATA_BLOB data;
956 reg_ldb_unpack_value(mem_ctx,
957 kd->values[i], NULL,
958 &data_type, &data);
959 *max_valbufsize = MAX(*max_valbufsize, data.length);
960 talloc_free(data.data);
961 }
962 }
963 }
964
965 talloc_free(default_value.data);
966
967 return WERR_OK;
968}
969
970static struct hive_operations reg_backend_ldb = {
971 .name = "ldb",
972 .add_key = ldb_add_key,
973 .del_key = ldb_del_key,
974 .get_key_by_name = ldb_open_key,
975 .enum_value = ldb_get_value_by_id,
976 .enum_key = ldb_get_subkey_by_id,
977 .set_value = ldb_set_value,
978 .get_value_by_name = ldb_get_value,
979 .delete_value = ldb_del_value,
980 .get_key_info = ldb_get_key_info,
981};
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