source4/lib/registry/ldb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Registry interface
   4    Copyright (C) Jelmer Vernooij  2004-2007.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "registry.h"
  22 #include "lib/ldb/include/ldb.h"
  23 #include "lib/ldb/include/ldb_errors.h"
  24 #include "ldb_wrap.h"
  25 #include "librpc/gen_ndr/winreg.h"
  26 #include "param/param.h"
  27
  28 static struct hive_operations reg_backend_ldb;
  29
  30 struct ldb_key_data
  31 {
  32         struct hive_key key;
  33         struct ldb_context *ldb;
  34         struct ldb_dn *dn;
  35         struct ldb_message **subkeys, **values;
  36         int subkey_count, value_count;
  37 };
  38
  39 static void reg_ldb_unpack_value(TALLOC_CTX *mem_ctx,
  40                                  struct smb_iconv_convenience *iconv_convenience,
  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         if (type != NULL)
  55                 *type = value_type;
  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                 data->length = convert_string_talloc(mem_ctx, iconv_convenience, CH_UNIX, CH_UTF16,
  63                                                      val->data, val->length,
  64                                                      (void **)&data->data);
  65                 break;
  66
  67         case REG_BINARY:
  68                 if (val)
  69                         *data = strhex_to_data_blob((char *)val->data);
  70                 else {
  71                         data->data = NULL;
  72                         data->length = 0;
  73                 }
  74                 break;
  75
  76         case REG_DWORD: {
  77                 uint32_t tmp = strtoul((char *)val->data, NULL, 0);
  78                 *data = data_blob_talloc(mem_ctx, &tmp, 4);
  79                 }
  80                 break;
  81
  82         default:
  83                 *data = data_blob_talloc(mem_ctx, val->data, val->length);
  84                 break;
  85         }
  86 }
  87
  88 static struct ldb_message *reg_ldb_pack_value(struct ldb_context *ctx,
  89                                               TALLOC_CTX *mem_ctx,
  90                                               const char *name,
  91                                               uint32_t type, DATA_BLOB data)
  92 {
  93         struct ldb_val val;
  94         struct ldb_message *msg = talloc_zero(mem_ctx, struct ldb_message);
  95         char *type_s;
  96
  97         ldb_msg_add_string(msg, "value", talloc_strdup(mem_ctx, name));
  98
  99         switch (type) {
 100         case REG_SZ:
 101         case REG_EXPAND_SZ:
 102                 val.length = convert_string_talloc(mem_ctx, lp_iconv_convenience(global_loadparm), CH_UTF16, CH_UNIX,
 103                                                    (void *)data.data,
 104                                                    data.length,
 105                                                    (void **)&val.data);
 106                 ldb_msg_add_value(msg, "data", &val, NULL);
 107                 break;
 108
 109         case REG_BINARY:
 110                 ldb_msg_add_string(msg, "data",
 111                                    data_blob_hex_string(mem_ctx, &data));
 112                 break;
 113
 114         case REG_DWORD:
 115                 ldb_msg_add_string(msg, "data",
 116                                    talloc_asprintf(mem_ctx, "0x%x",
 117                                                    IVAL(data.data, 0)));
 118                 break;
 119         default:
 120                 ldb_msg_add_value(msg, "data", &data, NULL);
 121         }
 122
 123
 124         type_s = talloc_asprintf(mem_ctx, "%u", type);
 125         ldb_msg_add_string(msg, "type", type_s);
 126
 127         return msg;
 128 }
 129
 130 static char *reg_ldb_escape(TALLOC_CTX *mem_ctx, const char *value)
 131 {
 132         struct ldb_val val;
 133
 134         val.data = discard_const_p(uint8_t, value);
 135         val.length = strlen(value);
 136
 137         return ldb_dn_escape_value(mem_ctx, val);
 138 }
 139
 140 static int reg_close_ldb_key(struct ldb_key_data *key)
 141 {
 142         if (key->subkeys != NULL) {
 143                 talloc_free(key->subkeys);
 144                 key->subkeys = NULL;
 145         }
 146
 147         if (key->values != NULL) {
 148                 talloc_free(key->values);
 149                 key->values = NULL;
 150         }
 151         return 0;
 152 }
 153
 154 static struct ldb_dn *reg_path_to_ldb(TALLOC_CTX *mem_ctx,
 155                                       const struct hive_key *from,
 156                                       const char *path, const char *add)
 157 {
 158         TALLOC_CTX *local_ctx;
 159         struct ldb_dn *ret;
 160         char *mypath = talloc_strdup(mem_ctx, path);
 161         char *begin;
 162         struct ldb_key_data *kd = talloc_get_type(from, struct ldb_key_data);
 163         struct ldb_context *ldb = kd->ldb;
 164
 165         local_ctx = talloc_new(mem_ctx);
 166
 167         if (add) {
 168                 ret = ldb_dn_new(mem_ctx, ldb, add);
 169         } else {
 170                 ret = ldb_dn_new(mem_ctx, ldb, NULL);
 171         }
 172         if (!ldb_dn_validate(ret)) {
 173                 talloc_free(ret);
 174                 talloc_free(local_ctx);
 175                 return NULL;
 176         }
 177
 178         while (mypath) {
 179                 char *keyname;
 180
 181                 begin = strrchr(mypath, '\\');
 182
 183                 if (begin) keyname = begin + 1;
 184                 else keyname = mypath;
 185
 186                 if(strlen(keyname)) {
 187                         if (!ldb_dn_add_base_fmt(ret, "key=%s",
 188                                                  reg_ldb_escape(local_ctx,
 189                                                                 keyname)))
 190                         {
 191                                 talloc_free(local_ctx);
 192                                 return NULL;
 193                         }
 194                 }
 195
 196                 if(begin) {
 197                         *begin = '\0';
 198                 } else {
 199                         break;
 200                 }
 201         }
 202
 203         ldb_dn_add_base(ret, kd->dn);
 204
 205         talloc_free(local_ctx);
 206
 207         return ret;
 208 }
 209
 210 static WERROR cache_subkeys(struct ldb_key_data *kd)
 211 {
 212         struct ldb_context *c = kd->ldb;
 213         struct ldb_result *res;
 214         int ret;
 215
 216         ret = ldb_search(c, kd->dn, LDB_SCOPE_ONELEVEL, "(key=*)", NULL, &res);
 217
 218         if (ret != LDB_SUCCESS) {
 219                 DEBUG(0, ("Error getting subkeys for '%s': %s\n",
 220                         ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
 221                 return WERR_FOOBAR;
 222         }
 223
 224         kd->subkey_count = res->count;
 225         kd->subkeys = talloc_steal(kd, res->msgs);
 226         talloc_free(res);
 227
 228         return WERR_OK;
 229 }
 230
 231 static WERROR cache_values(struct ldb_key_data *kd)
 232 {
 233         struct ldb_context *c = kd->ldb;
 234         struct ldb_result *res;
 235         int ret;
 236
 237         ret = ldb_search(c, kd->dn, LDB_SCOPE_ONELEVEL,
 238                          "(value=*)", NULL, &res);
 239
 240         if (ret != LDB_SUCCESS) {
 241                 DEBUG(0, ("Error getting values for '%s': %s\n",
 242                         ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
 243                 return WERR_FOOBAR;
 244         }
 245         kd->value_count = res->count;
 246         kd->values = talloc_steal(kd, res->msgs);
 247         talloc_free(res);
 248         return WERR_OK;
 249 }
 250
 251
 252 static WERROR ldb_get_subkey_by_id(TALLOC_CTX *mem_ctx,
 253                                    const struct hive_key *k, uint32_t idx,
 254                                    const char **name,
 255                                    const char **classname,
 256                                    NTTIME *last_mod_time)
 257 {
 258         struct ldb_message_element *el;
 259         struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
 260
 261         /* Do a search if necessary */
 262         if (kd->subkeys == NULL) {
 263                 W_ERROR_NOT_OK_RETURN(cache_subkeys(kd));
 264         }
 265
 266         if (idx >= kd->subkey_count)
 267                 return WERR_NO_MORE_ITEMS;
 268
 269         el = ldb_msg_find_element(kd->subkeys[idx], "key");
 270         SMB_ASSERT(el != NULL);
 271         SMB_ASSERT(el->num_values != 0);
 272
 273         if (name != NULL)
 274                 *name = talloc_strdup(mem_ctx, (char *)el->values[0].data);
 275
 276         if (classname != NULL)
 277                 *classname = NULL; /* TODO: Store properly */
 278
 279         if (last_mod_time != NULL)
 280                 *last_mod_time = 0; /* TODO: we need to add this to the
 281                                                 ldb backend properly */
 282
 283         return WERR_OK;
 284 }
 285
 286 static WERROR ldb_get_default_value(TALLOC_CTX *mem_ctx, struct hive_key *k,
 287                                   const char** name, uint32_t *data_type,
 288                                    DATA_BLOB *data)
 289 {
 290         struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
 291         struct ldb_context *c = kd->ldb;
 292         const char* attrs[] = { "data", "type", NULL };
 293         struct ldb_result *res;
 294         int ret;
 295
 296         ret = ldb_search(c, kd->dn, LDB_SCOPE_BASE, "", attrs, &res);
 297
 298         if (ret != LDB_SUCCESS) {
 299                 DEBUG(0, ("Error getting default value for '%s': %s\n",
 300                         ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
 301                 return WERR_FOOBAR;
 302         }
 303
 304         if (res->count == 0 || res->msgs[0]->num_elements == 0)
 305                 return WERR_BADFILE;
 306
 307         reg_ldb_unpack_value(mem_ctx, lp_iconv_convenience(global_loadparm),
 308                  res->msgs[0], name, data_type, data);
 309
 310         talloc_free(res);
 311
 312         return WERR_OK;
 313 }
 314
 315 static WERROR ldb_get_value_by_id(TALLOC_CTX *mem_ctx, struct hive_key *k,
 316                                   int idx, const char **name,
 317                                   uint32_t *data_type, DATA_BLOB *data)
 318 {
 319         struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
 320
 321         if (idx == 0) {
 322                 /* default value */
 323                 return ldb_get_default_value(mem_ctx, k, name, data_type, data);
 324         } else {
 325                 /* normal value */
 326
 327                 /* Do the search if necessary */
 328                 if (kd->values == NULL) {
 329                         W_ERROR_NOT_OK_RETURN(cache_values(kd));
 330                 }
 331
 332                 if (idx >= kd->value_count)
 333                         return WERR_NO_MORE_ITEMS;
 334
 335                 reg_ldb_unpack_value(mem_ctx, lp_iconv_convenience(global_loadparm),
 336                          kd->values[idx], name, data_type, data);
 337         }
 338
 339         return WERR_OK;
 340 }
 341
 342 static WERROR ldb_get_value(TALLOC_CTX *mem_ctx, struct hive_key *k,
 343                             const char *name, uint32_t *data_type,
 344                             DATA_BLOB *data)
 345 {
 346         struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
 347         struct ldb_context *c = kd->ldb;
 348         struct ldb_result *res;
 349         int ret;
 350         char *query;
 351
 352         if (strlen(name) == 0) {
 353                 /* default value */
 354                 return ldb_get_default_value(mem_ctx, k, NULL, data_type, data);
 355         } else {
 356                 /* normal value */
 357                 query = talloc_asprintf(mem_ctx, "(value=%s)", name);
 358                 ret = ldb_search(c, kd->dn, LDB_SCOPE_ONELEVEL, query, NULL, &res);
 359                 talloc_free(query);
 360
 361                 if (ret != LDB_SUCCESS) {
 362                         DEBUG(0, ("Error getting values for '%s': %s\n",
 363                                 ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
 364                         return WERR_FOOBAR;
 365                 }
 366
 367                 if (res->count == 0)
 368                         return WERR_BADFILE;
 369
 370                 reg_ldb_unpack_value(mem_ctx, lp_iconv_convenience(global_loadparm),
 371                          res->msgs[0], NULL, data_type, data);
 372
 373                 talloc_free(res);
 374         }
 375
 376         return WERR_OK;
 377 }
 378
 379 static WERROR ldb_open_key(TALLOC_CTX *mem_ctx, const struct hive_key *h,
 380                            const char *name, struct hive_key **key)
 381 {
 382         struct ldb_result *res;
 383         struct ldb_dn *ldap_path;
 384         int ret;
 385         struct ldb_key_data *newkd;
 386         struct ldb_key_data *kd = talloc_get_type(h, struct ldb_key_data);
 387         struct ldb_context *c = kd->ldb;
 388
 389         ldap_path = reg_path_to_ldb(mem_ctx, h, name, NULL);
 390
 391         ret = ldb_search(c, ldap_path, LDB_SCOPE_BASE, "(key=*)", NULL, &res);
 392
 393         if (ret != LDB_SUCCESS) {
 394                 DEBUG(3, ("Error opening key '%s': %s\n",
 395                         ldb_dn_get_linearized(ldap_path), ldb_errstring(c)));
 396                 return WERR_FOOBAR;
 397         } else if (res->count == 0) {
 398                 DEBUG(3, ("Key '%s' not found\n",
 399                         ldb_dn_get_linearized(ldap_path)));
 400                 talloc_free(res);
 401                 return WERR_BADFILE;
 402         }
 403
 404         newkd = talloc_zero(mem_ctx, struct ldb_key_data);
 405         newkd->key.ops = &reg_backend_ldb;
 406         newkd->ldb = talloc_reference(newkd, kd->ldb);
 407         newkd->dn = ldb_dn_copy(mem_ctx, res->msgs[0]->dn);
 408
 409         *key = (struct hive_key *)newkd;
 410
 411         return WERR_OK;
 412 }
 413
 414 WERROR reg_open_ldb_file(TALLOC_CTX *parent_ctx, const char *location,
 415                          struct auth_session_info *session_info,
 416                          struct cli_credentials *credentials,
 417                          struct event_context *ev_ctx,
 418                          struct loadparm_context *lp_ctx,
 419                          struct hive_key **k)
 420 {
 421         struct ldb_key_data *kd;
 422         struct ldb_context *wrap;
 423         struct ldb_message *attrs_msg;
 424
 425         if (location == NULL)
 426                 return WERR_INVALID_PARAM;
 427
 428         wrap = ldb_wrap_connect(parent_ctx, ev_ctx, lp_ctx,
 429                                 location, session_info, credentials, 0, NULL);
 430
 431         if (wrap == NULL) {
 432                 DEBUG(1, (__FILE__": unable to connect\n"));
 433                 return WERR_FOOBAR;
 434         }
 435
 436         attrs_msg = ldb_msg_new(wrap);
 437         W_ERROR_HAVE_NO_MEMORY(attrs_msg);
 438         attrs_msg->dn = ldb_dn_new(attrs_msg, wrap, "@ATTRIBUTES");
 439         W_ERROR_HAVE_NO_MEMORY(attrs_msg->dn);
 440         ldb_msg_add_string(attrs_msg, "key", "CASE_INSENSITIVE");
 441         ldb_msg_add_string(attrs_msg, "value", "CASE_INSENSITIVE");
 442
 443         ldb_add(wrap, attrs_msg);
 444
 445         ldb_set_debug_stderr(wrap);
 446
 447         kd = talloc_zero(parent_ctx, struct ldb_key_data);
 448         kd->key.ops = &reg_backend_ldb;
 449         kd->ldb = talloc_reference(kd, wrap);
 450         talloc_set_destructor (kd, reg_close_ldb_key);
 451         kd->dn = ldb_dn_new(kd, wrap, "hive=NONE");
 452
 453         *k = (struct hive_key *)kd;
 454
 455         return WERR_OK;
 456 }
 457
 458 static WERROR ldb_add_key(TALLOC_CTX *mem_ctx, const struct hive_key *parent,
 459                           const char *name, const char *classname,
 460                           struct security_descriptor *sd,
 461                           struct hive_key **newkey)
 462 {
 463         struct ldb_key_data *parentkd = discard_const_p(struct ldb_key_data, parent);
 464         struct ldb_message *msg;
 465         struct ldb_key_data *newkd;
 466         int ret;
 467
 468         msg = ldb_msg_new(mem_ctx);
 469
 470         msg->dn = reg_path_to_ldb(msg, parent, name, NULL);
 471
 472         ldb_msg_add_string(msg, "key", talloc_strdup(mem_ctx, name));
 473         if (classname != NULL)
 474                 ldb_msg_add_string(msg, "classname",
 475                                    talloc_strdup(mem_ctx, classname));
 476
 477         ret = ldb_add(parentkd->ldb, msg);
 478         if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
 479                 return WERR_ALREADY_EXISTS;
 480         }
 481
 482         if (ret != LDB_SUCCESS) {
 483                 DEBUG(1, ("ldb_add: %s\n", ldb_errstring(parentkd->ldb)));
 484                 return WERR_FOOBAR;
 485         }
 486
 487         DEBUG(2, ("key added: %s\n", ldb_dn_get_linearized(msg->dn)));
 488
 489         newkd = talloc_zero(mem_ctx, struct ldb_key_data);
 490         newkd->ldb = talloc_reference(newkd, parentkd->ldb);
 491         newkd->key.ops = &reg_backend_ldb;
 492         newkd->dn = talloc_steal(newkd, msg->dn);
 493
 494         *newkey = (struct hive_key *)newkd;
 495
 496         /* reset cache */
 497         talloc_free(parentkd->subkeys);
 498         parentkd->subkeys = NULL;
 499
 500         return WERR_OK;
 501 }
 502
 503 static WERROR ldb_del_value (struct hive_key *key, const char *child)
 504 {
 505         int ret;
 506         struct ldb_key_data *kd = talloc_get_type(key, struct ldb_key_data);
 507         TALLOC_CTX *mem_ctx;
 508         struct ldb_message *msg;
 509         struct ldb_dn *childdn;
 510
 511         if (strlen(child) == 0) {
 512                 /* default value */
 513                 mem_ctx = talloc_init("ldb_del_value");
 514
 515                 msg = talloc_zero(mem_ctx, struct ldb_message);
 516                 msg->dn = ldb_dn_copy(msg, kd->dn);
 517                 ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
 518                 ldb_msg_add_empty(msg, "type", LDB_FLAG_MOD_DELETE, NULL);
 519
 520                 ret = ldb_modify(kd->ldb, msg);
 521                 if (ret != LDB_SUCCESS) {
 522                         DEBUG(1, ("ldb_del_value: %s\n", ldb_errstring(kd->ldb)));
 523                         talloc_free(mem_ctx);
 524                         return WERR_FOOBAR;
 525                 }
 526
 527                 talloc_free(mem_ctx);
 528         } else {
 529                 /* normal value */
 530                 childdn = ldb_dn_copy(kd->ldb, kd->dn);
 531                 if (!ldb_dn_add_child_fmt(childdn, "value=%s",
 532                                   reg_ldb_escape(childdn, child)))
 533                 {
 534                         talloc_free(childdn);
 535                         return WERR_FOOBAR;
 536                 }
 537
 538                 ret = ldb_delete(kd->ldb, childdn);
 539
 540                 talloc_free(childdn);
 541
 542                 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
 543                         return WERR_BADFILE;
 544                 } else if (ret != LDB_SUCCESS) {
 545                         DEBUG(1, ("ldb_del_value: %s\n", ldb_errstring(kd->ldb)));
 546                         return WERR_FOOBAR;
 547                 }
 548         }
 549
 550         /* reset cache */
 551         talloc_free(kd->values);
 552         kd->values = NULL;
 553
 554         return WERR_OK;
 555 }
 556
 557 static WERROR ldb_del_key(const struct hive_key *key, const char *name)
 558 {
 559         int i, ret;
 560         struct ldb_key_data *parentkd = talloc_get_type(key, struct ldb_key_data);
 561         struct ldb_dn *ldap_path;
 562         TALLOC_CTX *mem_ctx = talloc_init("ldb_del_key");
 563         struct ldb_context *c = parentkd->ldb;
 564         struct ldb_result *res_keys;
 565         struct ldb_result *res_vals;
 566         WERROR werr;
 567         struct hive_key *hk;
 568
 569         /* Verify key exists by opening it */
 570         werr = ldb_open_key(mem_ctx, key, name, &hk);
 571         if (!W_ERROR_IS_OK(werr)) {
 572                 talloc_free(mem_ctx);
 573                 return werr;
 574         }
 575
 576         ldap_path = reg_path_to_ldb(mem_ctx, key, name, NULL);
 577         if (!ldap_path) {
 578                 talloc_free(mem_ctx);
 579                 return WERR_FOOBAR;
 580         }
 581
 582         /* Search for subkeys */
 583         ret = ldb_search(c, ldap_path, LDB_SCOPE_ONELEVEL,
 584                          "(key=*)", NULL, &res_keys);
 585
 586         if (ret != LDB_SUCCESS) {
 587                 DEBUG(0, ("Error getting subkeys for '%s': %s\n",
 588                       ldb_dn_get_linearized(ldap_path), ldb_errstring(c)));
 589                 talloc_free(mem_ctx);
 590                 return WERR_FOOBAR;
 591         }
 592
 593         /* Search for values */
 594         ret = ldb_search(c, ldap_path, LDB_SCOPE_ONELEVEL,
 595                          "(value=*)", NULL, &res_vals);
 596
 597         if (ret != LDB_SUCCESS) {
 598                 DEBUG(0, ("Error getting values for '%s': %s\n",
 599                       ldb_dn_get_linearized(ldap_path), ldb_errstring(c)));
 600                 talloc_free(mem_ctx);
 601                 return WERR_FOOBAR;
 602         }
 603
 604         /* Start an explicit transaction */
 605         ret = ldb_transaction_start(c);
 606
 607         if (ret != LDB_SUCCESS) {
 608                 DEBUG(0, ("ldb_transaction_start: %s\n", ldb_errstring(c)));
 609                 talloc_free(mem_ctx);
 610                 return WERR_FOOBAR;
 611         }
 612
 613         if (res_keys->count || res_vals->count)
 614         {
 615                 /* Delete any subkeys */
 616                 for (i = 0; i < res_keys->count; i++)
 617                 {
 618                         werr = ldb_del_key(hk, ldb_msg_find_attr_as_string(
 619                                                         res_keys->msgs[i],
 620                                                         "key", NULL));
 621                         if (!W_ERROR_IS_OK(werr)) {
 622                                 ret = ldb_transaction_cancel(c);
 623                                 talloc_free(mem_ctx);
 624                                 return werr;
 625                         }
 626                 }
 627
 628                 /* Delete any values */
 629                 for (i = 0; i < res_vals->count; i++)
 630                 {
 631                         werr = ldb_del_value(hk, ldb_msg_find_attr_as_string(
 632                                                         res_vals->msgs[i],
 633                                                         "value", NULL));
 634                         if (!W_ERROR_IS_OK(werr)) {
 635                                 ret = ldb_transaction_cancel(c);
 636                                 talloc_free(mem_ctx);
 637                                 return werr;
 638                         }
 639                 }
 640         }
 641
 642         /* Delete the key itself */
 643         ret = ldb_delete(c, ldap_path);
 644
 645         if (ret != LDB_SUCCESS)
 646         {
 647                 DEBUG(1, ("ldb_del_key: %s\n", ldb_errstring(c)));
 648                 ret = ldb_transaction_cancel(c);
 649                 talloc_free(mem_ctx);
 650                 return WERR_FOOBAR;
 651         }
 652
 653         /* Commit the transaction */
 654         ret = ldb_transaction_commit(c);
 655
 656         if (ret != LDB_SUCCESS)
 657         {
 658                 DEBUG(0, ("ldb_transaction_commit: %s\n", ldb_errstring(c)));
 659                 ret = ldb_transaction_cancel(c);
 660                 talloc_free(mem_ctx);
 661                 return WERR_FOOBAR;
 662         }
 663
 664         talloc_free(mem_ctx);
 665
 666         /* reset cache */
 667         talloc_free(parentkd->subkeys);
 668         parentkd->subkeys = NULL;
 669
 670         return WERR_OK;
 671 }
 672
 673 static WERROR ldb_set_value(struct hive_key *parent,
 674                             const char *name, uint32_t type,
 675                             const DATA_BLOB data)
 676 {
 677         struct ldb_message *msg;
 678         struct ldb_key_data *kd = talloc_get_type(parent, struct ldb_key_data);
 679         int ret;
 680         TALLOC_CTX *mem_ctx = talloc_init("ldb_set_value");
 681
 682         msg = reg_ldb_pack_value(kd->ldb, mem_ctx, name, type, data);
 683         msg->dn = ldb_dn_copy(msg, kd->dn);
 684
 685         if (strlen(name) > 0) {
 686                 /* For a default value, we add/overwrite the attributes to/of the hive.
 687                    For a normal value, we create new childs. */
 688                 if (!ldb_dn_add_child_fmt(msg->dn, "value=%s",
 689                                   reg_ldb_escape(mem_ctx, name)))
 690                 {
 691                         talloc_free(mem_ctx);
 692                         return WERR_FOOBAR;
 693                 }
 694         }
 695
 696         ret = ldb_add(kd->ldb, msg);
 697         if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
 698                 int i;
 699                 for (i = 0; i < msg->num_elements; i++) {
 700                         msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
 701                 }
 702                 ret = ldb_modify(kd->ldb, msg);
 703         }
 704
 705         if (ret != LDB_SUCCESS) {
 706                 DEBUG(1, ("ldb_set_value: %s\n", ldb_errstring(kd->ldb)));
 707                 talloc_free(mem_ctx);
 708                 return WERR_FOOBAR;
 709         }
 710
 711         /* reset cache */
 712         talloc_free(kd->values);
 713         kd->values = NULL;
 714
 715         talloc_free(mem_ctx);
 716         return WERR_OK;
 717 }
 718
 719 static WERROR ldb_get_key_info(TALLOC_CTX *mem_ctx,
 720                                const struct hive_key *key,
 721                                const char **classname,
 722                                uint32_t *num_subkeys,
 723                                uint32_t *num_values,
 724                                NTTIME *last_change_time,
 725                                uint32_t *max_subkeynamelen,
 726                                uint32_t *max_valnamelen,
 727                                uint32_t *max_valbufsize)
 728 {
 729         struct ldb_key_data *kd = talloc_get_type(key, struct ldb_key_data);
 730
 731         if (kd->subkeys == NULL) {
 732                 W_ERROR_NOT_OK_RETURN(cache_subkeys(kd));
 733         }
 734
 735         if (kd->values == NULL) {
 736                 W_ERROR_NOT_OK_RETURN(cache_values(kd));
 737         }
 738
 739         /* FIXME */
 740         if (classname != NULL)
 741                 *classname = NULL;
 742
 743         if (num_subkeys != NULL) {
 744                 *num_subkeys = kd->subkey_count;
 745         }
 746
 747         if (num_values != NULL) {
 748                 *num_values = kd->value_count;
 749         }
 750
 751         if (last_change_time != NULL)
 752                 *last_change_time = 0;
 753
 754         if (max_subkeynamelen != NULL) {
 755                 int i;
 756                 struct ldb_message_element *el;
 757
 758                 *max_subkeynamelen = 0;
 759
 760                 for (i = 0; i < kd->subkey_count; i++) {
 761                         el = ldb_msg_find_element(kd->subkeys[i], "key");
 762                         *max_subkeynamelen = MAX(*max_subkeynamelen, el->values[0].length);
 763                 }
 764         }
 765
 766         if (max_valnamelen != NULL || max_valbufsize != NULL) {
 767                 int i;
 768                 struct ldb_message_element *el;
 769                 W_ERROR_NOT_OK_RETURN(cache_values(kd));
 770
 771                 if (max_valbufsize != NULL)
 772                         *max_valbufsize = 0;
 773
 774                 if (max_valnamelen != NULL)
 775                         *max_valnamelen = 0;
 776
 777                 for (i = 0; i < kd->value_count; i++) {
 778                         if (max_valnamelen != NULL) {
 779                                 el = ldb_msg_find_element(kd->values[i], "value");
 780                                 *max_valnamelen = MAX(*max_valnamelen, el->values[0].length);
 781                         }
 782
 783                         if (max_valbufsize != NULL) {
 784                                 DATA_BLOB data;
 785                                 reg_ldb_unpack_value(mem_ctx,
 786                                                      lp_iconv_convenience(global_loadparm),
 787                                                      kd->values[i], NULL,
 788                                                      NULL, &data);
 789                                 *max_valbufsize = MAX(*max_valbufsize, data.length);
 790                                 talloc_free(data.data);
 791                         }
 792                 }
 793         }
 794
 795         return WERR_OK;
 796 }
 797
 798 static struct hive_operations reg_backend_ldb = {
 799         .name = "ldb",
 800         .add_key = ldb_add_key,
 801         .del_key = ldb_del_key,
 802         .get_key_by_name = ldb_open_key,
 803         .enum_value = ldb_get_value_by_id,
 804         .enum_key = ldb_get_subkey_by_id,
 805         .set_value = ldb_set_value,
 806         .get_value_by_name = ldb_get_value,
 807         .delete_value = ldb_del_value,
 808         .get_key_info = ldb_get_key_info,
 809 };