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         int subkey_count, value_count;
  38 };
  39
  40 static void reg_ldb_unpack_value(TALLOC_CTX *mem_ctx,
  41                                  struct smb_iconv_convenience *iconv_convenience,
  42                                  struct ldb_message *msg,
  43                                  const char **name, uint32_t *type,
  44                                  DATA_BLOB *data)
  45 {
  46         const struct ldb_val *val;
  47         uint32_t value_type;
  48
  49         if (name != NULL)
  50                 *name = talloc_strdup(mem_ctx,
  51                                       ldb_msg_find_attr_as_string(msg, "value",
  52                                       NULL));
  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                 data->length = convert_string_talloc(mem_ctx, iconv_convenience, CH_UNIX, CH_UTF16,
  64                                                      val->data, val->length,
  65                                                      (void **)&data->data);
  66                 break;
  67
  68         case REG_BINARY:
  69                 if (val)
  70                         *data = strhex_to_data_blob((char *)val->data);
  71                 else {
  72                         data->data = NULL;
  73                         data->length = 0;
  74                 }
  75                 break;
  76
  77         case REG_DWORD: {
  78                 uint32_t tmp = strtoul((char *)val->data, NULL, 0);
  79                 *data = data_blob_talloc(mem_ctx, &tmp, 4);
  80                 }
  81                 break;
  82
  83         default:
  84                 *data = data_blob_talloc(mem_ctx, val->data, val->length);
  85                 break;
  86         }
  87 }
  88
  89 static struct ldb_message *reg_ldb_pack_value(struct ldb_context *ctx,
  90                                               TALLOC_CTX *mem_ctx,
  91                                               const char *name,
  92                                               uint32_t type, DATA_BLOB data)
  93 {
  94         struct ldb_val val;
  95         struct ldb_message *msg = talloc_zero(mem_ctx, struct ldb_message);
  96         char *type_s;
  97
  98         ldb_msg_add_string(msg, "value", talloc_strdup(mem_ctx, name));
  99
 100         switch (type) {
 101         case REG_SZ:
 102         case REG_EXPAND_SZ:
 103                 val.length = convert_string_talloc(mem_ctx, lp_iconv_convenience(global_loadparm), CH_UTF16, CH_UNIX,
 104                                                    (void *)data.data,
 105                                                    data.length,
 106                                                    (void **)&val.data);
 107                 ldb_msg_add_value(msg, "data", &val, NULL);
 108                 break;
 109
 110         case REG_BINARY:
 111                 ldb_msg_add_string(msg, "data",
 112                                    data_blob_hex_string(mem_ctx, &data));
 113                 break;
 114
 115         case REG_DWORD:
 116                 ldb_msg_add_string(msg, "data",
 117                                    talloc_asprintf(mem_ctx, "0x%x",
 118                                                    IVAL(data.data, 0)));
 119                 break;
 120         default:
 121                 ldb_msg_add_value(msg, "data", &data, NULL);
 122         }
 123
 124
 125         type_s = talloc_asprintf(mem_ctx, "%u", type);
 126         ldb_msg_add_string(msg, "type", type_s);
 127
 128         return msg;
 129 }
 130
 131 static char *reg_ldb_escape(TALLOC_CTX *mem_ctx, const char *value)
 132 {
 133         struct ldb_val val;
 134
 135         val.data = discard_const_p(uint8_t, value);
 136         val.length = strlen(value);
 137
 138         return ldb_dn_escape_value(mem_ctx, val);
 139 }
 140
 141 static int reg_close_ldb_key(struct ldb_key_data *key)
 142 {
 143         if (key->subkeys != NULL) {
 144                 talloc_free(key->subkeys);
 145                 key->subkeys = NULL;
 146         }
 147
 148         if (key->values != NULL) {
 149                 talloc_free(key->values);
 150                 key->values = NULL;
 151         }
 152         return 0;
 153 }
 154
 155 static struct ldb_dn *reg_path_to_ldb(TALLOC_CTX *mem_ctx,
 156                                       const struct hive_key *from,
 157                                       const char *path, const char *add)
 158 {
 159         TALLOC_CTX *local_ctx;
 160         struct ldb_dn *ret;
 161         char *mypath = talloc_strdup(mem_ctx, path);
 162         char *begin;
 163         struct ldb_key_data *kd = talloc_get_type(from, struct ldb_key_data);
 164         struct ldb_context *ldb = kd->ldb;
 165
 166         local_ctx = talloc_new(mem_ctx);
 167
 168         if (add) {
 169                 ret = ldb_dn_new(mem_ctx, ldb, add);
 170         } else {
 171                 ret = ldb_dn_new(mem_ctx, ldb, NULL);
 172         }
 173         if (!ldb_dn_validate(ret)) {
 174                 talloc_free(ret);
 175                 talloc_free(local_ctx);
 176                 return NULL;
 177         }
 178
 179         while (mypath) {
 180                 char *keyname;
 181
 182                 begin = strrchr(mypath, '\\');
 183
 184                 if (begin) keyname = begin + 1;
 185                 else keyname = mypath;
 186
 187                 if(strlen(keyname)) {
 188                         if (!ldb_dn_add_base_fmt(ret, "key=%s",
 189                                                  reg_ldb_escape(local_ctx,
 190                                                                 keyname)))
 191                         {
 192                                 talloc_free(local_ctx);
 193                                 return NULL;
 194                         }
 195                 }
 196
 197                 if(begin) {
 198                         *begin = '\0';
 199                 } else {
 200                         break;
 201                 }
 202         }
 203
 204         ldb_dn_add_base(ret, kd->dn);
 205
 206         talloc_free(local_ctx);
 207
 208         return ret;
 209 }
 210
 211 static WERROR cache_subkeys(struct ldb_key_data *kd)
 212 {
 213         struct ldb_context *c = kd->ldb;
 214         struct ldb_result *res;
 215         int ret;
 216
 217         ret = ldb_search(c, kd->dn, LDB_SCOPE_ONELEVEL, "(key=*)", NULL, &res);
 218
 219         if (ret != LDB_SUCCESS) {
 220                 DEBUG(0, ("Error getting subkeys for '%s': %s\n",
 221                         ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
 222                 return WERR_FOOBAR;
 223         }
 224
 225         kd->subkey_count = res->count;
 226         kd->subkeys = talloc_steal(kd, res->msgs);
 227         talloc_free(res);
 228
 229         return WERR_OK;
 230 }
 231
 232 static WERROR cache_values(struct ldb_key_data *kd)
 233 {
 234         struct ldb_context *c = kd->ldb;
 235         struct ldb_result *res;
 236         int ret;
 237
 238         ret = ldb_search(c, kd->dn, LDB_SCOPE_ONELEVEL,
 239                          "(value=*)", NULL, &res);
 240
 241         if (ret != LDB_SUCCESS) {
 242                 DEBUG(0, ("Error getting values for '%s': %s\n",
 243                         ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
 244                 return WERR_FOOBAR;
 245         }
 246
 247         kd->value_count = res->count;
 248         kd->values = talloc_steal(kd, res->msgs);
 249         talloc_free(res);
 250
 251         return WERR_OK;
 252 }
 253
 254
 255 static WERROR ldb_get_subkey_by_id(TALLOC_CTX *mem_ctx,
 256                                    const struct hive_key *k, uint32_t idx,
 257                                    const char **name,
 258                                    const char **classname,
 259                                    NTTIME *last_mod_time)
 260 {
 261         struct ldb_message_element *el;
 262         struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
 263
 264         /* Initialization */
 265         if (name != NULL)
 266                 *name = NULL;
 267         if (classname != NULL)
 268                 *classname = NULL; /* TODO: Store properly */
 269         if (last_mod_time != NULL)
 270                 *last_mod_time = 0; /* TODO: we need to add this to the
 271                                                 ldb backend properly */
 272
 273         /* Do a search if necessary */
 274         if (kd->subkeys == NULL) {
 275                 W_ERROR_NOT_OK_RETURN(cache_subkeys(kd));
 276         }
 277
 278         if (idx >= kd->subkey_count)
 279                 return WERR_NO_MORE_ITEMS;
 280
 281         el = ldb_msg_find_element(kd->subkeys[idx], "key");
 282         SMB_ASSERT(el != NULL);
 283         SMB_ASSERT(el->num_values != 0);
 284
 285         if (name != NULL)
 286                 *name = talloc_strdup(mem_ctx, (char *)el->values[0].data);
 287
 288         return WERR_OK;
 289 }
 290
 291 static WERROR ldb_get_default_value(TALLOC_CTX *mem_ctx, struct hive_key *k,
 292                                   const char **name, uint32_t *data_type,
 293                                    DATA_BLOB *data)
 294 {
 295         struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
 296         struct ldb_context *c = kd->ldb;
 297         const char* attrs[] = { "data", "type", NULL };
 298         struct ldb_result *res;
 299         int ret;
 300
 301         ret = ldb_search(c, kd->dn, LDB_SCOPE_BASE, "", attrs, &res);
 302
 303         if (ret != LDB_SUCCESS) {
 304                 DEBUG(0, ("Error getting default value for '%s': %s\n",
 305                         ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
 306                 return WERR_FOOBAR;
 307         }
 308
 309         if (res->count == 0 || res->msgs[0]->num_elements == 0)
 310                 return WERR_BADFILE;
 311
 312         reg_ldb_unpack_value(mem_ctx, lp_iconv_convenience(global_loadparm),
 313                  res->msgs[0], name, data_type, data);
 314
 315         talloc_free(res);
 316
 317         return WERR_OK;
 318 }
 319
 320 static WERROR ldb_get_value_by_id(TALLOC_CTX *mem_ctx, struct hive_key *k,
 321                                   int idx, const char **name,
 322                                   uint32_t *data_type, DATA_BLOB *data)
 323 {
 324         struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
 325
 326         /* if default value exists, give it back */
 327         if (W_ERROR_IS_OK(ldb_get_default_value(mem_ctx, k, name, data_type,
 328                 data))) {
 329                 if (idx == 0)
 330                         return WERR_OK;
 331                 else
 332                         --idx;
 333         }
 334
 335         /* Do the search if necessary */
 336         if (kd->values == NULL) {
 337                 W_ERROR_NOT_OK_RETURN(cache_values(kd));
 338         }
 339
 340         if (idx >= kd->value_count)
 341                 return WERR_NO_MORE_ITEMS;
 342
 343         reg_ldb_unpack_value(mem_ctx, lp_iconv_convenience(global_loadparm),
 344                          kd->values[idx], name, data_type, data);
 345
 346         return WERR_OK;
 347 }
 348
 349 static WERROR ldb_get_value(TALLOC_CTX *mem_ctx, struct hive_key *k,
 350                             const char *name, uint32_t *data_type,
 351                             DATA_BLOB *data)
 352 {
 353         struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
 354         struct ldb_context *c = kd->ldb;
 355         struct ldb_result *res;
 356         int ret;
 357         char *query;
 358
 359         if (strlen(name) == 0) {
 360                 /* default value */
 361                 return ldb_get_default_value(mem_ctx, k, NULL, data_type, data);
 362         } else {
 363                 /* normal value */
 364                 query = talloc_asprintf(mem_ctx, "(value=%s)", name);
 365                 ret = ldb_search(c, kd->dn, LDB_SCOPE_ONELEVEL, query, NULL, &res);
 366                 talloc_free(query);
 367
 368                 if (ret != LDB_SUCCESS) {
 369                         DEBUG(0, ("Error getting values for '%s': %s\n",
 370                                 ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
 371                         return WERR_FOOBAR;
 372                 }
 373
 374                 if (res->count == 0)
 375                         return WERR_BADFILE;
 376
 377                 reg_ldb_unpack_value(mem_ctx, lp_iconv_convenience(global_loadparm),
 378                          res->msgs[0], NULL, data_type, data);
 379
 380                 talloc_free(res);
 381         }
 382
 383         return WERR_OK;
 384 }
 385
 386 static WERROR ldb_open_key(TALLOC_CTX *mem_ctx, const struct hive_key *h,
 387                            const char *name, struct hive_key **key)
 388 {
 389         struct ldb_result *res;
 390         struct ldb_dn *ldap_path;
 391         int ret;
 392         struct ldb_key_data *newkd;
 393         struct ldb_key_data *kd = talloc_get_type(h, struct ldb_key_data);
 394         struct ldb_context *c = kd->ldb;
 395
 396         ldap_path = reg_path_to_ldb(mem_ctx, h, name, NULL);
 397
 398         ret = ldb_search(c, ldap_path, LDB_SCOPE_BASE, "(key=*)", NULL, &res);
 399
 400         if (ret != LDB_SUCCESS) {
 401                 DEBUG(3, ("Error opening key '%s': %s\n",
 402                         ldb_dn_get_linearized(ldap_path), ldb_errstring(c)));
 403                 return WERR_FOOBAR;
 404         } else if (res->count == 0) {
 405                 DEBUG(3, ("Key '%s' not found\n",
 406                         ldb_dn_get_linearized(ldap_path)));
 407                 talloc_free(res);
 408                 return WERR_BADFILE;
 409         }
 410
 411         newkd = talloc_zero(mem_ctx, struct ldb_key_data);
 412         newkd->key.ops = &reg_backend_ldb;
 413         newkd->ldb = talloc_reference(newkd, kd->ldb);
 414         newkd->dn = ldb_dn_copy(mem_ctx, res->msgs[0]->dn);
 415
 416         *key = (struct hive_key *)newkd;
 417
 418         return WERR_OK;
 419 }
 420
 421 WERROR reg_open_ldb_file(TALLOC_CTX *parent_ctx, const char *location,
 422                          struct auth_session_info *session_info,
 423                          struct cli_credentials *credentials,
 424                          struct event_context *ev_ctx,
 425                          struct loadparm_context *lp_ctx,
 426                          struct hive_key **k)
 427 {
 428         struct ldb_key_data *kd;
 429         struct ldb_context *wrap;
 430         struct ldb_message *attrs_msg;
 431
 432         if (location == NULL)
 433                 return WERR_INVALID_PARAM;
 434
 435         wrap = ldb_wrap_connect(parent_ctx, ev_ctx, lp_ctx,
 436                                 location, session_info, credentials, 0, NULL);
 437
 438         if (wrap == NULL) {
 439                 DEBUG(1, (__FILE__": unable to connect\n"));
 440                 return WERR_FOOBAR;
 441         }
 442
 443         attrs_msg = ldb_msg_new(wrap);
 444         W_ERROR_HAVE_NO_MEMORY(attrs_msg);
 445         attrs_msg->dn = ldb_dn_new(attrs_msg, wrap, "@ATTRIBUTES");
 446         W_ERROR_HAVE_NO_MEMORY(attrs_msg->dn);
 447         ldb_msg_add_string(attrs_msg, "key", "CASE_INSENSITIVE");
 448         ldb_msg_add_string(attrs_msg, "value", "CASE_INSENSITIVE");
 449
 450         ldb_add(wrap, attrs_msg);
 451
 452         ldb_set_debug_stderr(wrap);
 453
 454         kd = talloc_zero(parent_ctx, struct ldb_key_data);
 455         kd->key.ops = &reg_backend_ldb;
 456         kd->ldb = talloc_reference(kd, wrap);
 457         talloc_set_destructor (kd, reg_close_ldb_key);
 458         kd->dn = ldb_dn_new(kd, wrap, "hive=NONE");
 459
 460         *k = (struct hive_key *)kd;
 461
 462         return WERR_OK;
 463 }
 464
 465 static WERROR ldb_add_key(TALLOC_CTX *mem_ctx, const struct hive_key *parent,
 466                           const char *name, const char *classname,
 467                           struct security_descriptor *sd,
 468                           struct hive_key **newkey)
 469 {
 470         struct ldb_key_data *parentkd = discard_const_p(struct ldb_key_data, parent);
 471         struct ldb_message *msg;
 472         struct ldb_key_data *newkd;
 473         int ret;
 474
 475         msg = ldb_msg_new(mem_ctx);
 476
 477         msg->dn = reg_path_to_ldb(msg, parent, name, NULL);
 478
 479         ldb_msg_add_string(msg, "key", talloc_strdup(mem_ctx, name));
 480         if (classname != NULL)
 481                 ldb_msg_add_string(msg, "classname",
 482                                    talloc_strdup(mem_ctx, classname));
 483
 484         ret = ldb_add(parentkd->ldb, msg);
 485         if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
 486                 return WERR_ALREADY_EXISTS;
 487         }
 488
 489         if (ret != LDB_SUCCESS) {
 490                 DEBUG(1, ("ldb_add: %s\n", ldb_errstring(parentkd->ldb)));
 491                 return WERR_FOOBAR;
 492         }
 493
 494         DEBUG(2, ("key added: %s\n", ldb_dn_get_linearized(msg->dn)));
 495
 496         newkd = talloc_zero(mem_ctx, struct ldb_key_data);
 497         newkd->ldb = talloc_reference(newkd, parentkd->ldb);
 498         newkd->key.ops = &reg_backend_ldb;
 499         newkd->dn = talloc_steal(newkd, msg->dn);
 500
 501         *newkey = (struct hive_key *)newkd;
 502
 503         /* reset cache */
 504         talloc_free(parentkd->subkeys);
 505         parentkd->subkeys = NULL;
 506
 507         return WERR_OK;
 508 }
 509
 510 static WERROR ldb_del_value (struct hive_key *key, const char *child)
 511 {
 512         int ret;
 513         struct ldb_key_data *kd = talloc_get_type(key, struct ldb_key_data);
 514         TALLOC_CTX *mem_ctx;
 515         struct ldb_message *msg;
 516         struct ldb_dn *childdn;
 517
 518         if (strlen(child) == 0) {
 519                 /* default value */
 520                 mem_ctx = talloc_init("ldb_del_value");
 521
 522                 msg = talloc_zero(mem_ctx, struct ldb_message);
 523                 msg->dn = ldb_dn_copy(msg, kd->dn);
 524                 ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
 525                 ldb_msg_add_empty(msg, "type", LDB_FLAG_MOD_DELETE, NULL);
 526
 527                 ret = ldb_modify(kd->ldb, msg);
 528                 if (ret != LDB_SUCCESS) {
 529                         DEBUG(1, ("ldb_del_value: %s\n", ldb_errstring(kd->ldb)));
 530                         talloc_free(mem_ctx);
 531                         return WERR_FOOBAR;
 532                 }
 533
 534                 talloc_free(mem_ctx);
 535         } else {
 536                 /* normal value */
 537                 childdn = ldb_dn_copy(kd->ldb, kd->dn);
 538                 if (!ldb_dn_add_child_fmt(childdn, "value=%s",
 539                                   reg_ldb_escape(childdn, child)))
 540                 {
 541                         talloc_free(childdn);
 542                         return WERR_FOOBAR;
 543                 }
 544
 545                 ret = ldb_delete(kd->ldb, childdn);
 546
 547                 talloc_free(childdn);
 548
 549                 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
 550                         return WERR_BADFILE;
 551                 } else if (ret != LDB_SUCCESS) {
 552                         DEBUG(1, ("ldb_del_value: %s\n", ldb_errstring(kd->ldb)));
 553                         return WERR_FOOBAR;
 554                 }
 555         }
 556
 557         /* reset cache */
 558         talloc_free(kd->values);
 559         kd->values = NULL;
 560
 561         return WERR_OK;
 562 }
 563
 564 static WERROR ldb_del_key(const struct hive_key *key, const char *name)
 565 {
 566         int i, ret;
 567         struct ldb_key_data *parentkd = talloc_get_type(key, struct ldb_key_data);
 568         struct ldb_dn *ldap_path;
 569         TALLOC_CTX *mem_ctx = talloc_init("ldb_del_key");
 570         struct ldb_context *c = parentkd->ldb;
 571         struct ldb_result *res_keys;
 572         struct ldb_result *res_vals;
 573         WERROR werr;
 574         struct hive_key *hk;
 575
 576         /* Verify key exists by opening it */
 577         werr = ldb_open_key(mem_ctx, key, name, &hk);
 578         if (!W_ERROR_IS_OK(werr)) {
 579                 talloc_free(mem_ctx);
 580                 return werr;
 581         }
 582
 583         ldap_path = reg_path_to_ldb(mem_ctx, key, name, NULL);
 584         if (!ldap_path) {
 585                 talloc_free(mem_ctx);
 586                 return WERR_FOOBAR;
 587         }
 588
 589         /* Search for subkeys */
 590         ret = ldb_search(c, ldap_path, LDB_SCOPE_ONELEVEL,
 591                          "(key=*)", NULL, &res_keys);
 592
 593         if (ret != LDB_SUCCESS) {
 594                 DEBUG(0, ("Error getting subkeys for '%s': %s\n",
 595                       ldb_dn_get_linearized(ldap_path), ldb_errstring(c)));
 596                 talloc_free(mem_ctx);
 597                 return WERR_FOOBAR;
 598         }
 599
 600         /* Search for values */
 601         ret = ldb_search(c, ldap_path, LDB_SCOPE_ONELEVEL,
 602                          "(value=*)", NULL, &res_vals);
 603
 604         if (ret != LDB_SUCCESS) {
 605                 DEBUG(0, ("Error getting values for '%s': %s\n",
 606                       ldb_dn_get_linearized(ldap_path), ldb_errstring(c)));
 607                 talloc_free(mem_ctx);
 608                 return WERR_FOOBAR;
 609         }
 610
 611         /* Start an explicit transaction */
 612         ret = ldb_transaction_start(c);
 613
 614         if (ret != LDB_SUCCESS) {
 615                 DEBUG(0, ("ldb_transaction_start: %s\n", ldb_errstring(c)));
 616                 talloc_free(mem_ctx);
 617                 return WERR_FOOBAR;
 618         }
 619
 620         if (res_keys->count || res_vals->count)
 621         {
 622                 /* Delete any subkeys */
 623                 for (i = 0; i < res_keys->count; i++)
 624                 {
 625                         werr = ldb_del_key(hk, ldb_msg_find_attr_as_string(
 626                                                         res_keys->msgs[i],
 627                                                         "key", NULL));
 628                         if (!W_ERROR_IS_OK(werr)) {
 629                                 ret = ldb_transaction_cancel(c);
 630                                 talloc_free(mem_ctx);
 631                                 return werr;
 632                         }
 633                 }
 634
 635                 /* Delete any values */
 636                 for (i = 0; i < res_vals->count; i++)
 637                 {
 638                         werr = ldb_del_value(hk, ldb_msg_find_attr_as_string(
 639                                                         res_vals->msgs[i],
 640                                                         "value", 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
 649         /* Delete the key itself */
 650         ret = ldb_delete(c, ldap_path);
 651
 652         if (ret != LDB_SUCCESS)
 653         {
 654                 DEBUG(1, ("ldb_del_key: %s\n", ldb_errstring(c)));
 655                 ret = ldb_transaction_cancel(c);
 656                 talloc_free(mem_ctx);
 657                 return WERR_FOOBAR;
 658         }
 659
 660         /* Commit the transaction */
 661         ret = ldb_transaction_commit(c);
 662
 663         if (ret != LDB_SUCCESS)
 664         {
 665                 DEBUG(0, ("ldb_transaction_commit: %s\n", ldb_errstring(c)));
 666                 ret = ldb_transaction_cancel(c);
 667                 talloc_free(mem_ctx);
 668                 return WERR_FOOBAR;
 669         }
 670
 671         talloc_free(mem_ctx);
 672
 673         /* reset cache */
 674         talloc_free(parentkd->subkeys);
 675         parentkd->subkeys = NULL;
 676
 677         return WERR_OK;
 678 }
 679
 680 static WERROR ldb_set_value(struct hive_key *parent,
 681                             const char *name, uint32_t type,
 682                             const DATA_BLOB data)
 683 {
 684         struct ldb_message *msg;
 685         struct ldb_key_data *kd = talloc_get_type(parent, struct ldb_key_data);
 686         int ret;
 687         TALLOC_CTX *mem_ctx = talloc_init("ldb_set_value");
 688
 689         msg = reg_ldb_pack_value(kd->ldb, mem_ctx, name, type, data);
 690         msg->dn = ldb_dn_copy(msg, kd->dn);
 691
 692         if (strlen(name) > 0) {
 693                 /* For a default value, we add/overwrite the attributes to/of the hive.
 694                    For a normal value, we create new childs. */
 695                 if (!ldb_dn_add_child_fmt(msg->dn, "value=%s",
 696                                   reg_ldb_escape(mem_ctx, name)))
 697                 {
 698                         talloc_free(mem_ctx);
 699                         return WERR_FOOBAR;
 700                 }
 701         }
 702
 703         ret = ldb_add(kd->ldb, msg);
 704         if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
 705                 int i;
 706                 for (i = 0; i < msg->num_elements; i++) {
 707                         msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
 708                 }
 709                 ret = ldb_modify(kd->ldb, msg);
 710         }
 711
 712         if (ret != LDB_SUCCESS) {
 713                 DEBUG(1, ("ldb_set_value: %s\n", ldb_errstring(kd->ldb)));
 714                 talloc_free(mem_ctx);
 715                 return WERR_FOOBAR;
 716         }
 717
 718         /* reset cache */
 719         talloc_free(kd->values);
 720         kd->values = NULL;
 721
 722         talloc_free(mem_ctx);
 723         return WERR_OK;
 724 }
 725
 726 static WERROR ldb_get_key_info(TALLOC_CTX *mem_ctx,
 727                                const struct hive_key *key,
 728                                const char **classname,
 729                                uint32_t *num_subkeys,
 730                                uint32_t *num_values,
 731                                NTTIME *last_change_time,
 732                                uint32_t *max_subkeynamelen,
 733                                uint32_t *max_valnamelen,
 734                                uint32_t *max_valbufsize)
 735 {
 736         struct ldb_key_data *kd = talloc_get_type(key, struct ldb_key_data);
 737
 738         /* Initialization */
 739         if (classname != NULL)
 740                 *classname = NULL;
 741         if (num_subkeys != NULL)
 742                 *num_subkeys = 0;
 743         if (num_values != NULL)
 744                 *num_values = 0;
 745         if (last_change_time != NULL)
 746                 *last_change_time = 0;
 747         if (max_subkeynamelen != NULL)
 748                 *max_subkeynamelen = 0;
 749         if (max_valnamelen != NULL)
 750                 *max_valnamelen = 0;
 751         if (max_valbufsize != NULL)
 752                 *max_valbufsize = 0;
 753
 754         if (kd->subkeys == NULL) {
 755                 W_ERROR_NOT_OK_RETURN(cache_subkeys(kd));
 756         }
 757
 758         if (kd->values == NULL) {
 759                 W_ERROR_NOT_OK_RETURN(cache_values(kd));
 760         }
 761
 762         if (num_subkeys != NULL) {
 763                 *num_subkeys = kd->subkey_count;
 764         }
 765         if (num_values != NULL) {
 766                 *num_values = kd->value_count;
 767         }
 768
 769
 770         if (max_subkeynamelen != NULL) {
 771                 int i;
 772                 struct ldb_message_element *el;
 773
 774                 *max_subkeynamelen = 0;
 775
 776                 for (i = 0; i < kd->subkey_count; i++) {
 777                         el = ldb_msg_find_element(kd->subkeys[i], "key");
 778                         *max_subkeynamelen = MAX(*max_subkeynamelen, el->values[0].length);
 779                 }
 780         }
 781
 782         if (max_valnamelen != NULL || max_valbufsize != NULL) {
 783                 int i;
 784                 struct ldb_message_element *el;
 785                 W_ERROR_NOT_OK_RETURN(cache_values(kd));
 786
 787                 if (max_valbufsize != NULL)
 788                         *max_valbufsize = 0;
 789
 790                 if (max_valnamelen != NULL)
 791                         *max_valnamelen = 0;
 792
 793                 for (i = 0; i < kd->value_count; i++) {
 794                         if (max_valnamelen != NULL) {
 795                                 el = ldb_msg_find_element(kd->values[i], "value");
 796                                 *max_valnamelen = MAX(*max_valnamelen, el->values[0].length);
 797                         }
 798
 799                         if (max_valbufsize != NULL) {
 800                                 uint32_t data_type;
 801                                 DATA_BLOB data;
 802                                 reg_ldb_unpack_value(mem_ctx,
 803                                                      lp_iconv_convenience(global_loadparm),
 804                                                      kd->values[i], NULL,
 805                                                      &data_type, &data);
 806                                 *max_valbufsize = MAX(*max_valbufsize, data.length);
 807                                 talloc_free(data.data);
 808                         }
 809                 }
 810         }
 811
 812         return WERR_OK;
 813 }
 814
 815 static struct hive_operations reg_backend_ldb = {
 816         .name = "ldb",
 817         .add_key = ldb_add_key,
 818         .del_key = ldb_del_key,
 819         .get_key_by_name = ldb_open_key,
 820         .enum_value = ldb_get_value_by_id,
 821         .enum_key = ldb_get_subkey_by_id,
 822         .set_value = ldb_set_value,
 823         .get_value_by_name = ldb_get_value,
 824         .delete_value = ldb_del_value,
 825         .get_key_info = ldb_get_key_info,
 826 };