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