source4/lib/registry/ldb.c

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