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                         if (val->data[0] != '\0') {
  65                                 /* The data should be provided as UTF16 string */
  66                                 convert_string_talloc(mem_ctx, CH_UTF8, CH_UTF16,
  67                                                       val->data, val->length,
  68                                                       (void **)&data->data, &data->length, false);
  69                         } else {
  70                                 /* Provide a possibility to store also UTF8
  71                                  * REG_SZ/REG_EXPAND_SZ values. This is done
  72                                  * by adding a '\0' in front of the data */
  73                                 data->data = talloc_size(mem_ctx, val->length - 1);
  74                                 if (data->data != NULL) {
  75                                         memcpy(data->data, val->data + 1,
  76                                                val->length - 1);
  77                                 }
  78                                 data->length = val->length - 1;
  79                         }
  80                 } else {
  81                         data->data = NULL;
  82                         data->length = 0;
  83                 }
  84                 break;
  85
  86         case REG_DWORD:
  87                 if (val != NULL) {
  88                         if (val->data[0] != '\0') {
  89                                 /* The data is a plain DWORD */
  90                                 uint32_t tmp = strtoul((char *)val->data, NULL, 0);
  91                                 data->data = talloc_size(mem_ctx, sizeof(uint32_t) + 1);
  92                                 if (data->data != NULL) {
  93                                         SIVAL(data->data, 0, tmp);
  94                                 }
  95                                 data->length = sizeof(uint32_t);
  96                         } else {
  97                                 /* Provide a possibility to store also UTF8
  98                                  * REG_DWORD values. This is done by adding a
  99                                  * '\0' in front of the data */
 100                                 data->data = talloc_size(mem_ctx, val->length - 1);
 101                                 if (data->data != NULL) {
 102                                         memcpy(data->data, val->data + 1,
 103                                                val->length - 1);
 104                                 }
 105                                 data->length = val->length - 1;
 106                         }
 107                 } else {
 108                         data->data = NULL;
 109                         data->length = 0;
 110                 }
 111                 break;
 112
 113         case REG_QWORD:
 114                 if (val != NULL) {
 115                         if (val->data[0] != '\0') {
 116                                 /* The data is a plain QWORD */
 117                                 uint64_t tmp = strtoull((char *)val->data, NULL, 0);
 118                                 data->data = talloc_size(mem_ctx, sizeof(uint64_t) + 1);
 119                                 if (data->data != NULL) {
 120                                         SBVAL(data->data, 0, tmp);
 121                                 }
 122                                 data->length = sizeof(uint64_t);
 123                         } else {
 124                                 /* Provide a possibility to store also UTF8
 125                                  * REG_QWORD values. This is done by adding a
 126                                  * '\0' in front of the data */
 127                                 data->data = talloc_size(mem_ctx, val->length - 1);
 128                                 if (data->data != NULL) {
 129                                         memcpy(data->data, val->data + 1,
 130                                                val->length - 1);
 131                                 }
 132                                 data->length = val->length - 1;
 133                         }
 134                 } else {
 135                         data->data = NULL;
 136                         data->length = 0;
 137                 }
 138                 break;
 139
 140         case REG_BINARY:
 141         default:
 142                 if (val != NULL) {
 143                         data->data = talloc_memdup(mem_ctx, val->data,
 144                                                    val->length);
 145                         data->length = val->length;
 146                 } else {
 147                         data->data = NULL;
 148                         data->length = 0;
 149                 }
 150                 break;
 151         }
 152 }
 153
 154 static struct ldb_message *reg_ldb_pack_value(struct ldb_context *ctx,
 155                                               TALLOC_CTX *mem_ctx,
 156                                               const char *name,
 157                                               uint32_t type, DATA_BLOB data)
 158 {
 159         struct ldb_message *msg;
 160         char *name_dup, *type_str;
 161         int ret;
 162
 163         msg = talloc_zero(mem_ctx, struct ldb_message);
 164         if (msg == NULL) {
 165                 return NULL;
 166         }
 167
 168         name_dup = talloc_strdup(msg, name);
 169         if (name_dup == NULL) {
 170                 talloc_free(msg);
 171                 return NULL;
 172         }
 173
 174         ret = ldb_msg_add_string(msg, "value", name_dup);
 175         if (ret != LDB_SUCCESS) {
 176                 talloc_free(msg);
 177                 return NULL;
 178         }
 179
 180         switch (type) {
 181         case REG_SZ:
 182         case REG_EXPAND_SZ:
 183                 if ((data.length > 0) && (data.data != NULL)
 184                     && (data.data[0] != '\0')) {
 185                         struct ldb_val *val;
 186                         bool ret2;
 187
 188                         val = talloc_zero(msg, struct ldb_val);
 189                         if (val == NULL) {
 190                                 talloc_free(msg);
 191                                 return NULL;
 192                         }
 193
 194                         if (data.length % 2 == 0) {
 195                                 /* The data is provided as UTF16 string */
 196                                 ret2 = convert_string_talloc(mem_ctx, CH_UTF16, CH_UTF8,
 197                                                              (void *)data.data, data.length,
 198                                                              (void **)&val->data, &val->length,
 199                                                              false);
 200                                 if (!ret2) {
 201                                         talloc_free(msg);
 202                                         return NULL;
 203                                 }
 204                         } else {
 205                                 /* Provide a possibility to store also UTF8
 206                                  * REG_SZ/REG_EXPAND_SZ values. This is done
 207                                  * by adding a '\0' in front of the data */
 208                                 val->data = talloc_size(msg, data.length + 1);
 209                                 if (val->data == NULL) {
 210                                         talloc_free(msg);
 211                                         return NULL;
 212                                 }
 213                                 val->data[0] = '\0';
 214                                 memcpy(val->data + 1, data.data, data.length);
 215                                 val->length = data.length + 1;
 216                         }
 217                         ret = ldb_msg_add_value(msg, "data", val, NULL);
 218                 } else {
 219                         ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
 220                 }
 221                 break;
 222
 223         case REG_DWORD:
 224                 if ((data.length > 0) && (data.data != NULL)) {
 225                         if (data.length == sizeof(uint32_t)) {
 226                                 char *conv_str;
 227
 228                                 conv_str = talloc_asprintf(msg, "0x%8.8x", IVAL(data.data, 0));
 229                                 if (conv_str == NULL) {
 230                                         talloc_free(msg);
 231                                         return NULL;
 232                                 }
 233                                 ret = ldb_msg_add_string(msg, "data", conv_str);
 234                         } else {
 235                                 /* Provide a possibility to store also UTF8
 236                                  * REG_DWORD values. This is done by adding a
 237                                  * '\0' in front of the data */
 238                                 struct ldb_val *val;
 239
 240                                 val = talloc_zero(msg, struct ldb_val);
 241                                 if (val == NULL) {
 242                                         talloc_free(msg);
 243                                         return NULL;
 244                                 }
 245
 246                                 val->data = talloc_size(msg, data.length + 1);
 247                                 if (val->data == NULL) {
 248                                         talloc_free(msg);
 249                                         return NULL;
 250                                 }
 251                                 val->data[0] = '\0';
 252                                 memcpy(val->data + 1, data.data, data.length);
 253                                 val->length = data.length + 1;
 254                                 ret = ldb_msg_add_value(msg, "data", val, NULL);
 255                         }
 256                 } else {
 257                         ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
 258                 }
 259                 break;
 260
 261         case REG_QWORD:
 262                 if ((data.length > 0) && (data.data != NULL)) {
 263                         if (data.length == sizeof(uint64_t)) {
 264                                 char *conv_str;
 265
 266                                 conv_str = talloc_asprintf(msg, "0x%16.16llx", BVAL(data.data, 0));
 267                                 if (conv_str == NULL) {
 268                                         talloc_free(msg);
 269                                         return NULL;
 270                                 }
 271                                 ret = ldb_msg_add_string(msg, "data", conv_str);
 272                         } else {
 273                                 /* Provide a possibility to store also UTF8
 274                                  * REG_QWORD values. This is done by adding a
 275                                  * '\0' in front of the data */
 276                                 struct ldb_val *val;
 277
 278                                 val = talloc_zero(msg, struct ldb_val);
 279                                 if (val == NULL) {
 280                                         talloc_free(msg);
 281                                         return NULL;
 282                                 }
 283
 284                                 val->data = talloc_size(msg, data.length + 1);
 285                                 if (val->data == NULL) {
 286                                         talloc_free(msg);
 287                                         return NULL;
 288                                 }
 289                                 val->data[0] = '\0';
 290                                 memcpy(val->data + 1, data.data, data.length);
 291                                 val->length = data.length + 1;
 292                                 ret = ldb_msg_add_value(msg, "data", val, NULL);
 293                         }
 294                 } else {
 295                         ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
 296                 }
 297                 break;
 298
 299         case REG_BINARY:
 300         default:
 301                 if ((data.length > 0) && (data.data != NULL)
 302                     && (data.data[0] != '\0')) {
 303                         ret = ldb_msg_add_value(msg, "data", &data, NULL);
 304                 } else {
 305                         ret = ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
 306                 }
 307                 break;
 308         }
 309
 310         if (ret != LDB_SUCCESS) {
 311                 talloc_free(msg);
 312                 return NULL;
 313         }
 314
 315         type_str = talloc_asprintf(mem_ctx, "%u", type);
 316         if (type_str == NULL) {
 317                 talloc_free(msg);
 318                 return NULL;
 319         }
 320
 321         ret = ldb_msg_add_string(msg, "type", type_str);
 322         if (ret != LDB_SUCCESS) {
 323                 talloc_free(msg);
 324                 return NULL;
 325         }
 326
 327         return msg;
 328 }
 329
 330 static char *reg_ldb_escape(TALLOC_CTX *mem_ctx, const char *value)
 331 {
 332         struct ldb_val val;
 333
 334         val.data = discard_const_p(uint8_t, value);
 335         val.length = strlen(value);
 336
 337         return ldb_dn_escape_value(mem_ctx, val);
 338 }
 339
 340 static int reg_close_ldb_key(struct ldb_key_data *key)
 341 {
 342         if (key->subkeys != NULL) {
 343                 talloc_free(key->subkeys);
 344                 key->subkeys = NULL;
 345         }
 346
 347         if (key->values != NULL) {
 348                 talloc_free(key->values);
 349                 key->values = NULL;
 350         }
 351         return 0;
 352 }
 353
 354 static struct ldb_dn *reg_path_to_ldb(TALLOC_CTX *mem_ctx,
 355                                       const struct hive_key *from,
 356                                       const char *path, const char *add)
 357 {
 358         TALLOC_CTX *local_ctx;
 359         struct ldb_dn *ret;
 360         char *mypath = talloc_strdup(mem_ctx, path);
 361         char *begin;
 362         struct ldb_key_data *kd = talloc_get_type(from, struct ldb_key_data);
 363         struct ldb_context *ldb = kd->ldb;
 364
 365         local_ctx = talloc_new(mem_ctx);
 366
 367         ret = ldb_dn_new(mem_ctx, ldb, add);
 368         if (!ldb_dn_validate(ret)) {
 369                 talloc_free(ret);
 370                 talloc_free(local_ctx);
 371                 return NULL;
 372         }
 373
 374         while (mypath) {
 375                 char *keyname;
 376
 377                 begin = strrchr(mypath, '\\');
 378
 379                 if (begin) keyname = begin + 1;
 380                 else keyname = mypath;
 381
 382                 if (keyname[0] != '\0') {
 383                         if (!ldb_dn_add_base_fmt(ret, "key=%s",
 384                                                  reg_ldb_escape(local_ctx,
 385                                                                 keyname)))
 386                         {
 387                                 talloc_free(local_ctx);
 388                                 return NULL;
 389                         }
 390                 }
 391
 392                 if(begin) {
 393                         *begin = '\0';
 394                 } else {
 395                         break;
 396                 }
 397         }
 398
 399         ldb_dn_add_base(ret, kd->dn);
 400
 401         talloc_free(local_ctx);
 402
 403         return ret;
 404 }
 405
 406 static WERROR cache_subkeys(struct ldb_key_data *kd)
 407 {
 408         struct ldb_context *c = kd->ldb;
 409         struct ldb_result *res;
 410         int ret;
 411
 412         ret = ldb_search(c, c, &res, kd->dn, LDB_SCOPE_ONELEVEL, NULL, "(key=*)");
 413
 414         if (ret != LDB_SUCCESS) {
 415                 DEBUG(0, ("Error getting subkeys for '%s': %s\n",
 416                         ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
 417                 return WERR_FOOBAR;
 418         }
 419
 420         kd->subkey_count = res->count;
 421         kd->subkeys = talloc_steal(kd, res->msgs);
 422         talloc_free(res);
 423
 424         return WERR_OK;
 425 }
 426
 427 static WERROR cache_values(struct ldb_key_data *kd)
 428 {
 429         struct ldb_context *c = kd->ldb;
 430         struct ldb_result *res;
 431         int ret;
 432
 433         ret = ldb_search(c, c, &res, kd->dn, LDB_SCOPE_ONELEVEL,
 434                          NULL, "(value=*)");
 435
 436         if (ret != LDB_SUCCESS) {
 437                 DEBUG(0, ("Error getting values for '%s': %s\n",
 438                         ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
 439                 return WERR_FOOBAR;
 440         }
 441
 442         kd->value_count = res->count;
 443         kd->values = talloc_steal(kd, res->msgs);
 444         talloc_free(res);
 445
 446         return WERR_OK;
 447 }
 448
 449
 450 static WERROR ldb_get_subkey_by_id(TALLOC_CTX *mem_ctx,
 451                                    const struct hive_key *k, uint32_t idx,
 452                                    const char **name,
 453                                    const char **classname,
 454                                    NTTIME *last_mod_time)
 455 {
 456         struct ldb_message_element *el;
 457         struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
 458
 459         /* Initialization */
 460         if (name != NULL)
 461                 *name = NULL;
 462         if (classname != NULL)
 463                 *classname = NULL; /* TODO: Store properly */
 464         if (last_mod_time != NULL)
 465                 *last_mod_time = 0; /* TODO: we need to add this to the
 466                                                 ldb backend properly */
 467
 468         /* Do a search if necessary */
 469         if (kd->subkeys == NULL) {
 470                 W_ERROR_NOT_OK_RETURN(cache_subkeys(kd));
 471         }
 472
 473         if (idx >= kd->subkey_count)
 474                 return WERR_NO_MORE_ITEMS;
 475
 476         el = ldb_msg_find_element(kd->subkeys[idx], "key");
 477         SMB_ASSERT(el != NULL);
 478         SMB_ASSERT(el->num_values != 0);
 479
 480         if (name != NULL)
 481                 *name = talloc_strdup(mem_ctx, (char *)el->values[0].data);
 482
 483         return WERR_OK;
 484 }
 485
 486 static WERROR ldb_get_default_value(TALLOC_CTX *mem_ctx, struct hive_key *k,
 487                                   const char **name, uint32_t *data_type,
 488                                    DATA_BLOB *data)
 489 {
 490         struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
 491         struct ldb_context *c = kd->ldb;
 492         const char* attrs[] = { "data", "type", NULL };
 493         struct ldb_result *res;
 494         int ret;
 495
 496         ret = ldb_search(c, mem_ctx, &res, kd->dn, LDB_SCOPE_BASE, attrs, "(key=*)");
 497
 498         if (ret != LDB_SUCCESS) {
 499                 DEBUG(0, ("Error getting default value for '%s': %s\n",
 500                         ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
 501                 return WERR_FOOBAR;
 502         }
 503
 504         if (res->count == 0 || res->msgs[0]->num_elements == 0)
 505                 return WERR_BADFILE;
 506
 507         reg_ldb_unpack_value(mem_ctx,
 508                  res->msgs[0], name, data_type, data);
 509
 510         talloc_free(res);
 511
 512         return WERR_OK;
 513 }
 514
 515 static WERROR ldb_get_value_by_id(TALLOC_CTX *mem_ctx, struct hive_key *k,
 516                                   uint32_t idx, const char **name,
 517                                   uint32_t *data_type, DATA_BLOB *data)
 518 {
 519         struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
 520
 521         /* if default value exists, give it back */
 522         if (W_ERROR_IS_OK(ldb_get_default_value(mem_ctx, k, name, data_type,
 523                 data))) {
 524                 if (idx == 0)
 525                         return WERR_OK;
 526                 else
 527                         --idx;
 528         }
 529
 530         /* Do the search if necessary */
 531         if (kd->values == NULL) {
 532                 W_ERROR_NOT_OK_RETURN(cache_values(kd));
 533         }
 534
 535         if (idx >= kd->value_count)
 536                 return WERR_NO_MORE_ITEMS;
 537
 538         reg_ldb_unpack_value(mem_ctx, kd->values[idx], name, data_type, data);
 539
 540         return WERR_OK;
 541 }
 542
 543 static WERROR ldb_get_value(TALLOC_CTX *mem_ctx, struct hive_key *k,
 544                             const char *name, uint32_t *data_type,
 545                             DATA_BLOB *data)
 546 {
 547         struct ldb_key_data *kd = talloc_get_type(k, struct ldb_key_data);
 548         struct ldb_context *c = kd->ldb;
 549         struct ldb_result *res;
 550         int ret;
 551
 552         if (name == NULL) {
 553                 return WERR_INVALID_PARAM;
 554         }
 555
 556         if (name[0] == '\0') {
 557                 /* default value */
 558                 return ldb_get_default_value(mem_ctx, k, NULL, data_type, data);
 559         } else {
 560                 /* normal value */
 561                 ret = ldb_search(c, mem_ctx, &res, kd->dn, LDB_SCOPE_ONELEVEL,
 562                                  NULL, "(value=%s)", name);
 563
 564                 if (ret != LDB_SUCCESS) {
 565                         DEBUG(0, ("Error getting values for '%s': %s\n",
 566                                 ldb_dn_get_linearized(kd->dn), ldb_errstring(c)));
 567                         return WERR_FOOBAR;
 568                 }
 569
 570                 if (res->count == 0)
 571                         return WERR_BADFILE;
 572
 573                 reg_ldb_unpack_value(mem_ctx, res->msgs[0], NULL, data_type, data);
 574
 575                 talloc_free(res);
 576         }
 577
 578         return WERR_OK;
 579 }
 580
 581 static WERROR ldb_open_key(TALLOC_CTX *mem_ctx, const struct hive_key *h,
 582                            const char *name, struct hive_key **key)
 583 {
 584         struct ldb_result *res;
 585         struct ldb_dn *ldap_path;
 586         int ret;
 587         struct ldb_key_data *newkd;
 588         struct ldb_key_data *kd = talloc_get_type(h, struct ldb_key_data);
 589         struct ldb_context *c = kd->ldb;
 590
 591         ldap_path = reg_path_to_ldb(mem_ctx, h, name, NULL);
 592         W_ERROR_HAVE_NO_MEMORY(ldap_path);
 593
 594         ret = ldb_search(c, mem_ctx, &res, ldap_path, LDB_SCOPE_BASE, NULL, "(key=*)");
 595
 596         if (ret != LDB_SUCCESS) {
 597                 DEBUG(3, ("Error opening key '%s': %s\n",
 598                         ldb_dn_get_linearized(ldap_path), ldb_errstring(c)));
 599                 return WERR_FOOBAR;
 600         } else if (res->count == 0) {
 601                 DEBUG(3, ("Key '%s' not found\n",
 602                         ldb_dn_get_linearized(ldap_path)));
 603                 talloc_free(res);
 604                 return WERR_BADFILE;
 605         }
 606
 607         newkd = talloc_zero(mem_ctx, struct ldb_key_data);
 608         newkd->key.ops = &reg_backend_ldb;
 609         newkd->ldb = talloc_reference(newkd, kd->ldb);
 610         newkd->dn = ldb_dn_copy(mem_ctx, res->msgs[0]->dn);
 611
 612         *key = (struct hive_key *)newkd;
 613
 614         return WERR_OK;
 615 }
 616
 617 WERROR reg_open_ldb_file(TALLOC_CTX *parent_ctx, const char *location,
 618                          struct auth_session_info *session_info,
 619                          struct cli_credentials *credentials,
 620                          struct tevent_context *ev_ctx,
 621                          struct loadparm_context *lp_ctx,
 622                          struct hive_key **k)
 623 {
 624         struct ldb_key_data *kd;
 625         struct ldb_context *wrap;
 626         struct ldb_message *attrs_msg;
 627
 628         if (location == NULL)
 629                 return WERR_INVALID_PARAM;
 630
 631         wrap = ldb_wrap_connect(parent_ctx, ev_ctx, lp_ctx,
 632                                 location, session_info, credentials, 0);
 633
 634         if (wrap == NULL) {
 635                 DEBUG(1, (__FILE__": unable to connect\n"));
 636                 return WERR_FOOBAR;
 637         }
 638
 639         attrs_msg = ldb_msg_new(wrap);
 640         W_ERROR_HAVE_NO_MEMORY(attrs_msg);
 641         attrs_msg->dn = ldb_dn_new(attrs_msg, wrap, "@ATTRIBUTES");
 642         W_ERROR_HAVE_NO_MEMORY(attrs_msg->dn);
 643         ldb_msg_add_string(attrs_msg, "key", "CASE_INSENSITIVE");
 644         ldb_msg_add_string(attrs_msg, "value", "CASE_INSENSITIVE");
 645
 646         ldb_add(wrap, attrs_msg);
 647
 648         ldb_set_debug_stderr(wrap);
 649
 650         kd = talloc_zero(parent_ctx, struct ldb_key_data);
 651         kd->key.ops = &reg_backend_ldb;
 652         kd->ldb = talloc_reference(kd, wrap);
 653         talloc_set_destructor (kd, reg_close_ldb_key);
 654         kd->dn = ldb_dn_new(kd, wrap, "hive=NONE");
 655
 656         *k = (struct hive_key *)kd;
 657
 658         return WERR_OK;
 659 }
 660
 661 static WERROR ldb_add_key(TALLOC_CTX *mem_ctx, const struct hive_key *parent,
 662                           const char *name, const char *classname,
 663                           struct security_descriptor *sd,
 664                           struct hive_key **newkey)
 665 {
 666         struct ldb_key_data *parentkd = discard_const_p(struct ldb_key_data, parent);
 667         struct ldb_message *msg;
 668         struct ldb_key_data *newkd;
 669         int ret;
 670
 671         msg = ldb_msg_new(mem_ctx);
 672         W_ERROR_HAVE_NO_MEMORY(msg);
 673
 674         msg->dn = reg_path_to_ldb(msg, parent, name, NULL);
 675         W_ERROR_HAVE_NO_MEMORY(msg->dn);
 676
 677         ldb_msg_add_string(msg, "key", talloc_strdup(mem_ctx, name));
 678         if (classname != NULL)
 679                 ldb_msg_add_string(msg, "classname",
 680                                    talloc_strdup(mem_ctx, classname));
 681
 682         ret = ldb_add(parentkd->ldb, msg);
 683         if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
 684                 return WERR_ALREADY_EXISTS;
 685         }
 686
 687         if (ret != LDB_SUCCESS) {
 688                 DEBUG(1, ("ldb_add: %s\n", ldb_errstring(parentkd->ldb)));
 689                 return WERR_FOOBAR;
 690         }
 691
 692         DEBUG(2, ("key added: %s\n", ldb_dn_get_linearized(msg->dn)));
 693
 694         newkd = talloc_zero(mem_ctx, struct ldb_key_data);
 695         W_ERROR_HAVE_NO_MEMORY(newkd);
 696         newkd->ldb = talloc_reference(newkd, parentkd->ldb);
 697         newkd->key.ops = &reg_backend_ldb;
 698         newkd->dn = talloc_steal(newkd, msg->dn);
 699
 700         *newkey = (struct hive_key *)newkd;
 701
 702         /* reset cache */
 703         talloc_free(parentkd->subkeys);
 704         parentkd->subkeys = NULL;
 705
 706         return WERR_OK;
 707 }
 708
 709 static WERROR ldb_del_value (struct hive_key *key, const char *child)
 710 {
 711         int ret;
 712         struct ldb_key_data *kd = talloc_get_type(key, struct ldb_key_data);
 713         TALLOC_CTX *mem_ctx;
 714         struct ldb_message *msg;
 715         struct ldb_dn *childdn;
 716
 717         if ((child == NULL) || (child[0] == '\0')) {
 718                 /* default value */
 719                 mem_ctx = talloc_init("ldb_del_value");
 720
 721                 msg = talloc_zero(mem_ctx, struct ldb_message);
 722                 W_ERROR_HAVE_NO_MEMORY(msg);
 723                 msg->dn = ldb_dn_copy(msg, kd->dn);
 724                 W_ERROR_HAVE_NO_MEMORY(msg->dn);
 725                 ldb_msg_add_empty(msg, "data", LDB_FLAG_MOD_DELETE, NULL);
 726                 ldb_msg_add_empty(msg, "type", LDB_FLAG_MOD_DELETE, NULL);
 727
 728                 ret = ldb_modify(kd->ldb, msg);
 729                 if (ret != LDB_SUCCESS) {
 730                         DEBUG(1, ("ldb_del_value: %s\n", ldb_errstring(kd->ldb)));
 731                         talloc_free(mem_ctx);
 732                         return WERR_FOOBAR;
 733                 }
 734
 735                 talloc_free(mem_ctx);
 736         } else {
 737                 /* normal value */
 738                 childdn = ldb_dn_copy(kd->ldb, kd->dn);
 739                 if (!ldb_dn_add_child_fmt(childdn, "value=%s",
 740                                   reg_ldb_escape(childdn, child)))
 741                 {
 742                         talloc_free(childdn);
 743                         return WERR_FOOBAR;
 744                 }
 745
 746                 ret = ldb_delete(kd->ldb, childdn);
 747
 748                 talloc_free(childdn);
 749
 750                 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
 751                         return WERR_BADFILE;
 752                 } else if (ret != LDB_SUCCESS) {
 753                         DEBUG(1, ("ldb_del_value: %s\n", ldb_errstring(kd->ldb)));
 754                         return WERR_FOOBAR;
 755                 }
 756         }
 757
 758         /* reset cache */
 759         talloc_free(kd->values);
 760         kd->values = NULL;
 761
 762         return WERR_OK;
 763 }
 764
 765 static WERROR ldb_del_key(const struct hive_key *key, const char *name)
 766 {
 767         unsigned int i;
 768         int ret;
 769         struct ldb_key_data *parentkd = talloc_get_type(key, struct ldb_key_data);
 770         struct ldb_dn *ldap_path;
 771         TALLOC_CTX *mem_ctx = talloc_init("ldb_del_key");
 772         struct ldb_context *c = parentkd->ldb;
 773         struct ldb_result *res_keys;
 774         struct ldb_result *res_vals;
 775         WERROR werr;
 776         struct hive_key *hk;
 777
 778         /* Verify key exists by opening it */
 779         werr = ldb_open_key(mem_ctx, key, name, &hk);
 780         if (!W_ERROR_IS_OK(werr)) {
 781                 talloc_free(mem_ctx);
 782                 return werr;
 783         }
 784
 785         ldap_path = reg_path_to_ldb(mem_ctx, key, name, NULL);
 786         W_ERROR_HAVE_NO_MEMORY(ldap_path);
 787
 788         /* Search for subkeys */
 789         ret = ldb_search(c, mem_ctx, &res_keys, ldap_path, LDB_SCOPE_ONELEVEL,
 790                          NULL, "(key=*)");
 791
 792         if (ret != LDB_SUCCESS) {
 793                 DEBUG(0, ("Error getting subkeys for '%s': %s\n",
 794                       ldb_dn_get_linearized(ldap_path), ldb_errstring(c)));
 795                 talloc_free(mem_ctx);
 796                 return WERR_FOOBAR;
 797         }
 798
 799         /* Search for values */
 800         ret = ldb_search(c, mem_ctx, &res_vals, ldap_path, LDB_SCOPE_ONELEVEL,
 801                          NULL, "(value=*)");
 802
 803         if (ret != LDB_SUCCESS) {
 804                 DEBUG(0, ("Error getting values for '%s': %s\n",
 805                       ldb_dn_get_linearized(ldap_path), ldb_errstring(c)));
 806                 talloc_free(mem_ctx);
 807                 return WERR_FOOBAR;
 808         }
 809
 810         /* Start an explicit transaction */
 811         ret = ldb_transaction_start(c);
 812
 813         if (ret != LDB_SUCCESS) {
 814                 DEBUG(0, ("ldb_transaction_start: %s\n", ldb_errstring(c)));
 815                 talloc_free(mem_ctx);
 816                 return WERR_FOOBAR;
 817         }
 818
 819         if (res_keys->count || res_vals->count)
 820         {
 821                 /* Delete any subkeys */
 822                 for (i = 0; i < res_keys->count; i++)
 823                 {
 824                         werr = ldb_del_key(hk, ldb_msg_find_attr_as_string(
 825                                                         res_keys->msgs[i],
 826                                                         "key", NULL));
 827                         if (!W_ERROR_IS_OK(werr)) {
 828                                 ret = ldb_transaction_cancel(c);
 829                                 talloc_free(mem_ctx);
 830                                 return werr;
 831                         }
 832                 }
 833
 834                 /* Delete any values */
 835                 for (i = 0; i < res_vals->count; i++)
 836                 {
 837                         werr = ldb_del_value(hk, ldb_msg_find_attr_as_string(
 838                                                         res_vals->msgs[i],
 839                                                         "value", NULL));
 840                         if (!W_ERROR_IS_OK(werr)) {
 841                                 ret = ldb_transaction_cancel(c);
 842                                 talloc_free(mem_ctx);
 843                                 return werr;
 844                         }
 845                 }
 846         }
 847
 848         /* Delete the key itself */
 849         ret = ldb_delete(c, ldap_path);
 850
 851         if (ret != LDB_SUCCESS)
 852         {
 853                 DEBUG(1, ("ldb_del_key: %s\n", ldb_errstring(c)));
 854                 ret = ldb_transaction_cancel(c);
 855                 talloc_free(mem_ctx);
 856                 return WERR_FOOBAR;
 857         }
 858
 859         /* Commit the transaction */
 860         ret = ldb_transaction_commit(c);
 861
 862         if (ret != LDB_SUCCESS)
 863         {
 864                 DEBUG(0, ("ldb_transaction_commit: %s\n", ldb_errstring(c)));
 865                 ret = ldb_transaction_cancel(c);
 866                 talloc_free(mem_ctx);
 867                 return WERR_FOOBAR;
 868         }
 869
 870         talloc_free(mem_ctx);
 871
 872         /* reset cache */
 873         talloc_free(parentkd->subkeys);
 874         parentkd->subkeys = NULL;
 875
 876         return WERR_OK;
 877 }
 878
 879 static WERROR ldb_set_value(struct hive_key *parent,
 880                             const char *name, uint32_t type,
 881                             const DATA_BLOB data)
 882 {
 883         struct ldb_message *msg;
 884         struct ldb_key_data *kd = talloc_get_type(parent, struct ldb_key_data);
 885         unsigned int i;
 886         int ret;
 887         TALLOC_CTX *mem_ctx = talloc_init("ldb_set_value");
 888
 889         msg = reg_ldb_pack_value(kd->ldb, mem_ctx, name, type, data);
 890         W_ERROR_HAVE_NO_MEMORY(msg);
 891
 892         msg->dn = ldb_dn_copy(msg, kd->dn);
 893         W_ERROR_HAVE_NO_MEMORY(msg->dn);
 894
 895         if ((name != NULL) && (name[0] != '\0')) {
 896                 /* For a default value, we add/overwrite the attributes to/of the hive.
 897                    For a normal value, we create a new child. */
 898                 if (!ldb_dn_add_child_fmt(msg->dn, "value=%s",
 899                                   reg_ldb_escape(mem_ctx, name)))
 900                 {
 901                         talloc_free(mem_ctx);
 902                         return WERR_FOOBAR;
 903                 }
 904         }
 905
 906         /* Try first a "modify" and if this doesn't work do try an "add" */
 907         for (i = 0; i < msg->num_elements; i++) {
 908                 if (msg->elements[i].flags != LDB_FLAG_MOD_DELETE) {
 909                         msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
 910                 }
 911         }
 912         ret = ldb_modify(kd->ldb, msg);
 913         if (ret == LDB_ERR_NO_SUCH_OBJECT) {
 914                 i = 0;
 915                 while (i < msg->num_elements) {
 916                         if (msg->elements[i].flags == LDB_FLAG_MOD_DELETE) {
 917                                 ldb_msg_remove_element(msg, &msg->elements[i]);
 918                         } else {
 919                                 ++i;
 920                         }
 921                 }
 922                 ret = ldb_add(kd->ldb, msg);
 923         }
 924         if (ret == LDB_ERR_NO_SUCH_ATTRIBUTE) {
 925                 /* ignore this -> the value didn't exist and also now doesn't */
 926                 ret = LDB_SUCCESS;
 927         }
 928
 929         if (ret != LDB_SUCCESS) {
 930                 DEBUG(1, ("ldb_set_value: %s\n", ldb_errstring(kd->ldb)));
 931                 talloc_free(mem_ctx);
 932                 return WERR_FOOBAR;
 933         }
 934
 935         /* reset cache */
 936         talloc_free(kd->values);
 937         kd->values = NULL;
 938
 939         talloc_free(mem_ctx);
 940         return WERR_OK;
 941 }
 942
 943 static WERROR ldb_get_key_info(TALLOC_CTX *mem_ctx,
 944                                const struct hive_key *key,
 945                                const char **classname,
 946                                uint32_t *num_subkeys,
 947                                uint32_t *num_values,
 948                                NTTIME *last_change_time,
 949                                uint32_t *max_subkeynamelen,
 950                                uint32_t *max_valnamelen,
 951                                uint32_t *max_valbufsize)
 952 {
 953         struct ldb_key_data *kd = talloc_get_type(key, struct ldb_key_data);
 954
 955         /* Initialization */
 956         if (classname != NULL)
 957                 *classname = NULL;
 958         if (num_subkeys != NULL)
 959                 *num_subkeys = 0;
 960         if (num_values != NULL)
 961                 *num_values = 0;
 962         if (last_change_time != NULL)
 963                 *last_change_time = 0;
 964         if (max_subkeynamelen != NULL)
 965                 *max_subkeynamelen = 0;
 966         if (max_valnamelen != NULL)
 967                 *max_valnamelen = 0;
 968         if (max_valbufsize != NULL)
 969                 *max_valbufsize = 0;
 970
 971         if (kd->subkeys == NULL) {
 972                 W_ERROR_NOT_OK_RETURN(cache_subkeys(kd));
 973         }
 974
 975         if (kd->values == NULL) {
 976                 W_ERROR_NOT_OK_RETURN(cache_values(kd));
 977         }
 978
 979         if (num_subkeys != NULL) {
 980                 *num_subkeys = kd->subkey_count;
 981         }
 982         if (num_values != NULL) {
 983                 *num_values = kd->value_count;
 984         }
 985
 986
 987         if (max_subkeynamelen != NULL) {
 988                 unsigned int i;
 989                 struct ldb_message_element *el;
 990
 991                 *max_subkeynamelen = 0;
 992
 993                 for (i = 0; i < kd->subkey_count; i++) {
 994                         el = ldb_msg_find_element(kd->subkeys[i], "key");
 995                         *max_subkeynamelen = MAX(*max_subkeynamelen, el->values[0].length);
 996                 }
 997         }
 998
 999         if (max_valnamelen != NULL || max_valbufsize != NULL) {
1000                 unsigned int i;
1001                 struct ldb_message_element *el;
1002                 W_ERROR_NOT_OK_RETURN(cache_values(kd));
1003
1004                 if (max_valbufsize != NULL)
1005                         *max_valbufsize = 0;
1006
1007                 if (max_valnamelen != NULL)
1008                         *max_valnamelen = 0;
1009
1010                 for (i = 0; i < kd->value_count; i++) {
1011                         if (max_valnamelen != NULL) {
1012                                 el = ldb_msg_find_element(kd->values[i], "value");
1013                                 *max_valnamelen = MAX(*max_valnamelen, el->values[0].length);
1014                         }
1015
1016                         if (max_valbufsize != NULL) {
1017                                 uint32_t data_type;
1018                                 DATA_BLOB data;
1019                                 reg_ldb_unpack_value(mem_ctx,
1020                                                      kd->values[i], NULL,
1021                                                      &data_type, &data);
1022                                 *max_valbufsize = MAX(*max_valbufsize, data.length);
1023                                 talloc_free(data.data);
1024                         }
1025                 }
1026         }
1027
1028         return WERR_OK;
1029 }
1030
1031 static struct hive_operations reg_backend_ldb = {
1032         .name = "ldb",
1033         .add_key = ldb_add_key,
1034         .del_key = ldb_del_key,
1035         .get_key_by_name = ldb_open_key,
1036         .enum_value = ldb_get_value_by_id,
1037         .enum_key = ldb_get_subkey_by_id,
1038         .set_value = ldb_set_value,
1039         .get_value_by_name = ldb_get_value,
1040         .delete_value = ldb_del_value,
1041         .get_key_info = ldb_get_key_info,
1042 };