source3/registry/reg_api.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  Virtual Windows Registry Layer
   4  *  Copyright (C) Volker Lendecke 2006
   5  *  Copyright (C) Michael Adam 2007-2008
   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 /* Attempt to wrap the existing API in a more winreg.idl-like way */
  22
  23 /*
  24  * Here is a list of winreg.idl functions and corresponding implementations
  25  * provided here:
  26  *
  27  * 0x00         winreg_OpenHKCR
  28  * 0x01         winreg_OpenHKCU
  29  * 0x02         winreg_OpenHKLM
  30  * 0x03         winreg_OpenHKPD
  31  * 0x04         winreg_OpenHKU
  32  * 0x05         winreg_CloseKey
  33  * 0x06         winreg_CreateKey                        reg_createkey
  34  * 0x07         winreg_DeleteKey                        reg_deletekey
  35  * 0x08         winreg_DeleteValue                      reg_deletevalue
  36  * 0x09         winreg_EnumKey                          reg_enumkey
  37  * 0x0a         winreg_EnumValue                        reg_enumvalue
  38  * 0x0b         winreg_FlushKey
  39  * 0x0c         winreg_GetKeySecurity                   reg_getkeysecurity
  40  * 0x0d         winreg_LoadKey
  41  * 0x0e         winreg_NotifyChangeKeyValue
  42  * 0x0f         winreg_OpenKey                          reg_openkey
  43  * 0x10         winreg_QueryInfoKey                     reg_queryinfokey
  44  * 0x11         winreg_QueryValue                       reg_queryvalue
  45  * 0x12         winreg_ReplaceKey
  46  * 0x13         winreg_RestoreKey                       reg_restorekey
  47  * 0x14         winreg_SaveKey                          reg_savekey
  48  * 0x15         winreg_SetKeySecurity                   reg_setkeysecurity
  49  * 0x16         winreg_SetValue                         reg_setvalue
  50  * 0x17         winreg_UnLoadKey
  51  * 0x18         winreg_InitiateSystemShutdown
  52  * 0x19         winreg_AbortSystemShutdown
  53  * 0x1a         winreg_GetVersion                       reg_getversion
  54  * 0x1b         winreg_OpenHKCC
  55  * 0x1c         winreg_OpenHKDD
  56  * 0x1d         winreg_QueryMultipleValues
  57  * 0x1e         winreg_InitiateSystemShutdownEx
  58  * 0x1f         winreg_SaveKeyEx
  59  * 0x20         winreg_OpenHKPT
  60  * 0x21         winreg_OpenHKPN
  61  * 0x22         winreg_QueryMultipleValues2
  62  *
  63  */
  64
  65 #include "includes.h"
  66 #include "regfio.h"
  67
  68 #undef DBGC_CLASS
  69 #define DBGC_CLASS DBGC_REGISTRY
  70
  71
  72 /**********************************************************************
  73  * Helper functions
  74  **********************************************************************/
  75
  76 static WERROR fill_value_cache(struct registry_key *key)
  77 {
  78         if (key->values != NULL) {
  79                 if (!reg_values_need_update(key->key, key->values)) {
  80                         return WERR_OK;
  81                 }
  82         }
  83
  84         if (!(key->values = TALLOC_ZERO_P(key, REGVAL_CTR))) {
  85                 return WERR_NOMEM;
  86         }
  87         if (fetch_reg_values(key->key, key->values) == -1) {
  88                 TALLOC_FREE(key->values);
  89                 return WERR_BADFILE;
  90         }
  91
  92         return WERR_OK;
  93 }
  94
  95 static WERROR fill_subkey_cache(struct registry_key *key)
  96 {
  97         WERROR werr;
  98
  99         if (key->subkeys != NULL) {
 100                 if (!reg_subkeys_need_update(key->key, key->subkeys)) {
 101                         return WERR_OK;
 102                 }
 103         }
 104
 105         werr = regsubkey_ctr_init(key, &(key->subkeys));
 106         W_ERROR_NOT_OK_RETURN(werr);
 107
 108         if (fetch_reg_keys(key->key, key->subkeys) == -1) {
 109                 TALLOC_FREE(key->subkeys);
 110                 return WERR_NO_MORE_ITEMS;
 111         }
 112
 113         return WERR_OK;
 114 }
 115
 116 static int regkey_destructor(REGISTRY_KEY *key)
 117 {
 118         return regdb_close();
 119 }
 120
 121 static WERROR regkey_open_onelevel(TALLOC_CTX *mem_ctx,
 122                                    struct registry_key *parent,
 123                                    const char *name,
 124                                    const struct nt_user_token *token,
 125                                    uint32 access_desired,
 126                                    struct registry_key **pregkey)
 127 {
 128         WERROR          result = WERR_OK;
 129         struct registry_key *regkey;
 130         REGISTRY_KEY *key;
 131         struct regsubkey_ctr    *subkeys = NULL;
 132
 133         DEBUG(7,("regkey_open_onelevel: name = [%s]\n", name));
 134
 135         SMB_ASSERT(strchr(name, '\\') == NULL);
 136
 137         if (!(regkey = TALLOC_ZERO_P(mem_ctx, struct registry_key)) ||
 138             !(regkey->token = dup_nt_token(regkey, token)) ||
 139             !(regkey->key = TALLOC_ZERO_P(regkey, REGISTRY_KEY))) {
 140                 result = WERR_NOMEM;
 141                 goto done;
 142         }
 143
 144         if ( !(W_ERROR_IS_OK(result = regdb_open())) ) {
 145                 goto done;
 146         }
 147
 148         key = regkey->key;
 149         talloc_set_destructor(key, regkey_destructor);
 150
 151         /* initialization */
 152
 153         key->type = REG_KEY_GENERIC;
 154
 155         if (name[0] == '\0') {
 156                 /*
 157                  * Open a copy of the parent key
 158                  */
 159                 if (!parent) {
 160                         result = WERR_BADFILE;
 161                         goto done;
 162                 }
 163                 key->name = talloc_strdup(key, parent->key->name);
 164         }
 165         else {
 166                 /*
 167                  * Normal subkey open
 168                  */
 169                 key->name = talloc_asprintf(key, "%s%s%s",
 170                                             parent ? parent->key->name : "",
 171                                             parent ? "\\": "",
 172                                             name);
 173         }
 174
 175         if (key->name == NULL) {
 176                 result = WERR_NOMEM;
 177                 goto done;
 178         }
 179
 180         /* Tag this as a Performance Counter Key */
 181
 182         if( StrnCaseCmp(key->name, KEY_HKPD, strlen(KEY_HKPD)) == 0 )
 183                 key->type = REG_KEY_HKPD;
 184
 185         /* Look up the table of registry I/O operations */
 186
 187         if ( !(key->ops = reghook_cache_find( key->name )) ) {
 188                 DEBUG(0,("reg_open_onelevel: Failed to assign "
 189                          "REGISTRY_OPS to [%s]\n", key->name ));
 190                 result = WERR_BADFILE;
 191                 goto done;
 192         }
 193
 194         /* check if the path really exists; failed is indicated by -1 */
 195         /* if the subkey count failed, bail out */
 196
 197         result = regsubkey_ctr_init(key, &subkeys);
 198         if (!W_ERROR_IS_OK(result)) {
 199                 goto done;
 200         }
 201
 202         if ( fetch_reg_keys( key, subkeys ) == -1 )  {
 203                 result = WERR_BADFILE;
 204                 goto done;
 205         }
 206
 207         TALLOC_FREE( subkeys );
 208
 209         if ( !regkey_access_check( key, access_desired, &key->access_granted,
 210                                    token ) ) {
 211                 result = WERR_ACCESS_DENIED;
 212                 goto done;
 213         }
 214
 215         *pregkey = regkey;
 216         result = WERR_OK;
 217
 218 done:
 219         if ( !W_ERROR_IS_OK(result) ) {
 220                 TALLOC_FREE(regkey);
 221         }
 222
 223         return result;
 224 }
 225
 226 WERROR reg_openhive(TALLOC_CTX *mem_ctx, const char *hive,
 227                     uint32 desired_access,
 228                     const struct nt_user_token *token,
 229                     struct registry_key **pkey)
 230 {
 231         SMB_ASSERT(hive != NULL);
 232         SMB_ASSERT(hive[0] != '\0');
 233         SMB_ASSERT(strchr(hive, '\\') == NULL);
 234
 235         return regkey_open_onelevel(mem_ctx, NULL, hive, token, desired_access,
 236                                     pkey);
 237 }
 238
 239
 240 /**********************************************************************
 241  * The API functions
 242  **********************************************************************/
 243
 244 WERROR reg_openkey(TALLOC_CTX *mem_ctx, struct registry_key *parent,
 245                    const char *name, uint32 desired_access,
 246                    struct registry_key **pkey)
 247 {
 248         struct registry_key *direct_parent = parent;
 249         WERROR err;
 250         char *p, *path, *to_free;
 251         size_t len;
 252
 253         if (!(path = SMB_STRDUP(name))) {
 254                 return WERR_NOMEM;
 255         }
 256         to_free = path;
 257
 258         len = strlen(path);
 259
 260         if ((len > 0) && (path[len-1] == '\\')) {
 261                 path[len-1] = '\0';
 262         }
 263
 264         while ((p = strchr(path, '\\')) != NULL) {
 265                 char *name_component;
 266                 struct registry_key *tmp;
 267
 268                 if (!(name_component = SMB_STRNDUP(path, (p - path)))) {
 269                         err = WERR_NOMEM;
 270                         goto error;
 271                 }
 272
 273                 err = regkey_open_onelevel(mem_ctx, direct_parent,
 274                                            name_component, parent->token,
 275                                            SEC_RIGHTS_ENUM_SUBKEYS, &tmp);
 276                 SAFE_FREE(name_component);
 277
 278                 if (!W_ERROR_IS_OK(err)) {
 279                         goto error;
 280                 }
 281                 if (direct_parent != parent) {
 282                         TALLOC_FREE(direct_parent);
 283                 }
 284
 285                 direct_parent = tmp;
 286                 path = p+1;
 287         }
 288
 289         err = regkey_open_onelevel(mem_ctx, direct_parent, path, parent->token,
 290                                    desired_access, pkey);
 291  error:
 292         if (direct_parent != parent) {
 293                 TALLOC_FREE(direct_parent);
 294         }
 295         SAFE_FREE(to_free);
 296         return err;
 297 }
 298
 299 WERROR reg_enumkey(TALLOC_CTX *mem_ctx, struct registry_key *key,
 300                    uint32 idx, char **name, NTTIME *last_write_time)
 301 {
 302         WERROR err;
 303
 304         if (!(key->key->access_granted & SEC_RIGHTS_ENUM_SUBKEYS)) {
 305                 return WERR_ACCESS_DENIED;
 306         }
 307
 308         if (!W_ERROR_IS_OK(err = fill_subkey_cache(key))) {
 309                 return err;
 310         }
 311
 312         if (idx >= regsubkey_ctr_numkeys(key->subkeys)) {
 313                 return WERR_NO_MORE_ITEMS;
 314         }
 315
 316         if (!(*name = talloc_strdup(mem_ctx,
 317                         regsubkey_ctr_specific_key(key->subkeys, idx))))
 318         {
 319                 return WERR_NOMEM;
 320         }
 321
 322         if (last_write_time) {
 323                 *last_write_time = 0;
 324         }
 325
 326         return WERR_OK;
 327 }
 328
 329 WERROR reg_enumvalue(TALLOC_CTX *mem_ctx, struct registry_key *key,
 330                      uint32 idx, char **pname, struct registry_value **pval)
 331 {
 332         struct registry_value *val;
 333         WERROR err;
 334
 335         if (!(key->key->access_granted & SEC_RIGHTS_QUERY_VALUE)) {
 336                 return WERR_ACCESS_DENIED;
 337         }
 338
 339         if (!(W_ERROR_IS_OK(err = fill_value_cache(key)))) {
 340                 return err;
 341         }
 342
 343         if (idx >= key->values->num_values) {
 344                 return WERR_NO_MORE_ITEMS;
 345         }
 346
 347         err = registry_pull_value(mem_ctx, &val,
 348                                   key->values->values[idx]->type,
 349                                   key->values->values[idx]->data_p,
 350                                   key->values->values[idx]->size,
 351                                   key->values->values[idx]->size);
 352         if (!W_ERROR_IS_OK(err)) {
 353                 return err;
 354         }
 355
 356         if (pname
 357             && !(*pname = talloc_strdup(
 358                          mem_ctx, key->values->values[idx]->valuename))) {
 359                 SAFE_FREE(val);
 360                 return WERR_NOMEM;
 361         }
 362
 363         *pval = val;
 364         return WERR_OK;
 365 }
 366
 367 WERROR reg_queryvalue(TALLOC_CTX *mem_ctx, struct registry_key *key,
 368                       const char *name, struct registry_value **pval)
 369 {
 370         WERROR err;
 371         uint32 i;
 372
 373         if (!(key->key->access_granted & SEC_RIGHTS_QUERY_VALUE)) {
 374                 return WERR_ACCESS_DENIED;
 375         }
 376
 377         if (!(W_ERROR_IS_OK(err = fill_value_cache(key)))) {
 378                 return err;
 379         }
 380
 381         for (i=0; i<key->values->num_values; i++) {
 382                 if (strequal(key->values->values[i]->valuename, name)) {
 383                         return reg_enumvalue(mem_ctx, key, i, NULL, pval);
 384                 }
 385         }
 386
 387         return WERR_BADFILE;
 388 }
 389
 390 WERROR reg_queryinfokey(struct registry_key *key, uint32_t *num_subkeys,
 391                         uint32_t *max_subkeylen, uint32_t *max_subkeysize,
 392                         uint32_t *num_values, uint32_t *max_valnamelen,
 393                         uint32_t *max_valbufsize, uint32_t *secdescsize,
 394                         NTTIME *last_changed_time)
 395 {
 396         uint32 i, max_size;
 397         size_t max_len;
 398         TALLOC_CTX *mem_ctx;
 399         WERROR err;
 400         struct security_descriptor *secdesc;
 401
 402         if (!(key->key->access_granted & SEC_RIGHTS_QUERY_VALUE)) {
 403                 return WERR_ACCESS_DENIED;
 404         }
 405
 406         if (!W_ERROR_IS_OK(fill_subkey_cache(key)) ||
 407             !W_ERROR_IS_OK(fill_value_cache(key))) {
 408                 return WERR_BADFILE;
 409         }
 410
 411         max_len = 0;
 412         for (i=0; i< regsubkey_ctr_numkeys(key->subkeys); i++) {
 413                 max_len = MAX(max_len,
 414                         strlen(regsubkey_ctr_specific_key(key->subkeys, i)));
 415         }
 416
 417         *num_subkeys = regsubkey_ctr_numkeys(key->subkeys);
 418         *max_subkeylen = max_len;
 419         *max_subkeysize = 0;    /* Class length? */
 420
 421         max_len = 0;
 422         max_size = 0;
 423         for (i=0; i<key->values->num_values; i++) {
 424                 max_len = MAX(max_len,
 425                               strlen(key->values->values[i]->valuename));
 426                 max_size = MAX(max_size, key->values->values[i]->size);
 427         }
 428
 429         *num_values = key->values->num_values;
 430         *max_valnamelen = max_len;
 431         *max_valbufsize = max_size;
 432
 433         if (!(mem_ctx = talloc_new(key))) {
 434                 return WERR_NOMEM;
 435         }
 436
 437         err = regkey_get_secdesc(mem_ctx, key->key, &secdesc);
 438         if (!W_ERROR_IS_OK(err)) {
 439                 TALLOC_FREE(mem_ctx);
 440                 return err;
 441         }
 442
 443         *secdescsize = ndr_size_security_descriptor(secdesc, NULL, 0);
 444         TALLOC_FREE(mem_ctx);
 445
 446         *last_changed_time = 0;
 447
 448         return WERR_OK;
 449 }
 450
 451 WERROR reg_createkey(TALLOC_CTX *ctx, struct registry_key *parent,
 452                      const char *subkeypath, uint32 desired_access,
 453                      struct registry_key **pkey,
 454                      enum winreg_CreateAction *paction)
 455 {
 456         struct registry_key *key = parent;
 457         struct registry_key *create_parent;
 458         TALLOC_CTX *mem_ctx;
 459         char *path, *end;
 460         WERROR err;
 461
 462         if (!(mem_ctx = talloc_new(ctx))) return WERR_NOMEM;
 463
 464         if (!(path = talloc_strdup(mem_ctx, subkeypath))) {
 465                 err = WERR_NOMEM;
 466                 goto done;
 467         }
 468
 469         while ((end = strchr(path, '\\')) != NULL) {
 470                 struct registry_key *tmp;
 471                 enum winreg_CreateAction action;
 472
 473                 *end = '\0';
 474
 475                 err = reg_createkey(mem_ctx, key, path,
 476                                     SEC_RIGHTS_ENUM_SUBKEYS, &tmp, &action);
 477                 if (!W_ERROR_IS_OK(err)) {
 478                         goto done;
 479                 }
 480
 481                 if (key != parent) {
 482                         TALLOC_FREE(key);
 483                 }
 484
 485                 key = tmp;
 486                 path = end+1;
 487         }
 488
 489         /*
 490          * At this point, "path" contains the one-element subkey of "key". We
 491          * can try to open it.
 492          */
 493
 494         err = reg_openkey(ctx, key, path, desired_access, pkey);
 495         if (W_ERROR_IS_OK(err)) {
 496                 if (paction != NULL) {
 497                         *paction = REG_OPENED_EXISTING_KEY;
 498                 }
 499                 goto done;
 500         }
 501
 502         if (!W_ERROR_EQUAL(err, WERR_BADFILE)) {
 503                 /*
 504                  * Something but "notfound" has happened, so bail out
 505                  */
 506                 goto done;
 507         }
 508
 509         /*
 510          * We have to make a copy of the current key, as we opened it only
 511          * with ENUM_SUBKEY access.
 512          */
 513
 514         err = reg_openkey(mem_ctx, key, "", SEC_RIGHTS_CREATE_SUBKEY,
 515                           &create_parent);
 516         if (!W_ERROR_IS_OK(err)) {
 517                 goto done;
 518         }
 519
 520         /*
 521          * Actually create the subkey
 522          */
 523
 524         err = fill_subkey_cache(create_parent);
 525         if (!W_ERROR_IS_OK(err)) goto done;
 526
 527         err = create_reg_subkey(key->key, path);
 528         W_ERROR_NOT_OK_GOTO_DONE(err);
 529
 530         /*
 531          * Now open the newly created key
 532          */
 533
 534         err = reg_openkey(ctx, create_parent, path, desired_access, pkey);
 535         if (W_ERROR_IS_OK(err) && (paction != NULL)) {
 536                 *paction = REG_CREATED_NEW_KEY;
 537         }
 538
 539  done:
 540         TALLOC_FREE(mem_ctx);
 541         return err;
 542 }
 543
 544 WERROR reg_deletekey(struct registry_key *parent, const char *path)
 545 {
 546         WERROR err;
 547         char *name, *end;
 548         struct registry_key *tmp_key, *key;
 549         TALLOC_CTX *mem_ctx = talloc_stackframe();
 550
 551         name = talloc_strdup(mem_ctx, path);
 552         if (name == NULL) {
 553                 err = WERR_NOMEM;
 554                 goto done;
 555         }
 556
 557         /* check if the key has subkeys */
 558         err = reg_openkey(mem_ctx, parent, name, REG_KEY_READ, &key);
 559         W_ERROR_NOT_OK_GOTO_DONE(err);
 560
 561         err = fill_subkey_cache(key);
 562         W_ERROR_NOT_OK_GOTO_DONE(err);
 563
 564         if (regsubkey_ctr_numkeys(key->subkeys) > 0) {
 565                 err = WERR_ACCESS_DENIED;
 566                 goto done;
 567         }
 568
 569         /* no subkeys - proceed with delete */
 570         end = strrchr(name, '\\');
 571         if (end != NULL) {
 572                 *end = '\0';
 573
 574                 err = reg_openkey(mem_ctx, parent, name,
 575                                   SEC_RIGHTS_CREATE_SUBKEY, &tmp_key);
 576                 W_ERROR_NOT_OK_GOTO_DONE(err);
 577
 578                 parent = tmp_key;
 579                 name = end+1;
 580         }
 581
 582         if (name[0] == '\0') {
 583                 err = WERR_INVALID_PARAM;
 584                 goto done;
 585         }
 586
 587         err = delete_reg_subkey(parent->key, name);
 588
 589 done:
 590         TALLOC_FREE(mem_ctx);
 591         return err;
 592 }
 593
 594 WERROR reg_setvalue(struct registry_key *key, const char *name,
 595                     const struct registry_value *val)
 596 {
 597         WERROR err;
 598         DATA_BLOB value_data;
 599         int res;
 600
 601         if (!(key->key->access_granted & SEC_RIGHTS_SET_VALUE)) {
 602                 return WERR_ACCESS_DENIED;
 603         }
 604
 605         if (!W_ERROR_IS_OK(err = fill_value_cache(key))) {
 606                 return err;
 607         }
 608
 609         err = registry_push_value(key, val, &value_data);
 610         if (!W_ERROR_IS_OK(err)) {
 611                 return err;
 612         }
 613
 614         res = regval_ctr_addvalue(key->values, name, val->type,
 615                                   (char *)value_data.data, value_data.length);
 616         TALLOC_FREE(value_data.data);
 617
 618         if (res == 0) {
 619                 TALLOC_FREE(key->values);
 620                 return WERR_NOMEM;
 621         }
 622
 623         if (!store_reg_values(key->key, key->values)) {
 624                 TALLOC_FREE(key->values);
 625                 return WERR_REG_IO_FAILURE;
 626         }
 627
 628         return WERR_OK;
 629 }
 630
 631 static WERROR reg_value_exists(struct registry_key *key, const char *name)
 632 {
 633         int i;
 634
 635         for (i=0; i<key->values->num_values; i++) {
 636                 if (strequal(key->values->values[i]->valuename, name)) {
 637                         return WERR_OK;
 638                 }
 639         }
 640
 641         return WERR_BADFILE;
 642 }
 643
 644 WERROR reg_deletevalue(struct registry_key *key, const char *name)
 645 {
 646         WERROR err;
 647
 648         if (!(key->key->access_granted & SEC_RIGHTS_SET_VALUE)) {
 649                 return WERR_ACCESS_DENIED;
 650         }
 651
 652         if (!W_ERROR_IS_OK(err = fill_value_cache(key))) {
 653                 return err;
 654         }
 655
 656         err = reg_value_exists(key, name);
 657         if (!W_ERROR_IS_OK(err)) {
 658                 return err;
 659         }
 660
 661         regval_ctr_delvalue(key->values, name);
 662
 663         if (!store_reg_values(key->key, key->values)) {
 664                 TALLOC_FREE(key->values);
 665                 return WERR_REG_IO_FAILURE;
 666         }
 667
 668         return WERR_OK;
 669 }
 670
 671 WERROR reg_getkeysecurity(TALLOC_CTX *mem_ctx, struct registry_key *key,
 672                           struct security_descriptor **psecdesc)
 673 {
 674         return regkey_get_secdesc(mem_ctx, key->key, psecdesc);
 675 }
 676
 677 WERROR reg_setkeysecurity(struct registry_key *key,
 678                           struct security_descriptor *psecdesc)
 679 {
 680         return regkey_set_secdesc(key->key, psecdesc);
 681 }
 682
 683 WERROR reg_getversion(uint32_t *version)
 684 {
 685         if (version == NULL) {
 686                 return WERR_INVALID_PARAM;
 687         }
 688
 689         *version = 0x00000005; /* Windows 2000 registry API version */
 690         return WERR_OK;
 691 }
 692
 693 /*******************************************************************
 694  Note: topkeypat is the *full* path that this *key will be
 695  loaded into (including the name of the key)
 696  ********************************************************************/
 697
 698 static WERROR reg_load_tree(REGF_FILE *regfile, const char *topkeypath,
 699                             REGF_NK_REC *key)
 700 {
 701         REGF_NK_REC *subkey;
 702         REGISTRY_KEY registry_key;
 703         REGVAL_CTR *values;
 704         struct regsubkey_ctr *subkeys;
 705         int i;
 706         char *path = NULL;
 707         WERROR result = WERR_OK;
 708
 709         /* initialize the REGISTRY_KEY structure */
 710
 711         registry_key.ops = reghook_cache_find(topkeypath);
 712         if (!registry_key.ops) {
 713                 DEBUG(0, ("reg_load_tree: Failed to assign  REGISTRY_OPS "
 714                           "to [%s]\n", topkeypath));
 715                 return WERR_BADFILE;
 716         }
 717
 718         registry_key.name = talloc_strdup(regfile->mem_ctx, topkeypath);
 719         if (!registry_key.name) {
 720                 DEBUG(0, ("reg_load_tree: Talloc failed for reg_key.name!\n"));
 721                 return WERR_NOMEM;
 722         }
 723
 724         /* now start parsing the values and subkeys */
 725
 726         result = regsubkey_ctr_init(regfile->mem_ctx, &subkeys);
 727         W_ERROR_NOT_OK_RETURN(result);
 728
 729         values = TALLOC_ZERO_P(subkeys, REGVAL_CTR);
 730         if (values == NULL) {
 731                 return WERR_NOMEM;
 732         }
 733
 734         /* copy values into the REGVAL_CTR */
 735
 736         for (i=0; i<key->num_values; i++) {
 737                 regval_ctr_addvalue(values, key->values[i].valuename,
 738                                     key->values[i].type,
 739                                     (char*)key->values[i].data,
 740                                     (key->values[i].data_size & ~VK_DATA_IN_OFFSET));
 741         }
 742
 743         /* copy subkeys into the struct regsubkey_ctr */
 744
 745         key->subkey_index = 0;
 746         while ((subkey = regfio_fetch_subkey( regfile, key ))) {
 747                 result = regsubkey_ctr_addkey(subkeys, subkey->keyname);
 748                 if (!W_ERROR_IS_OK(result)) {
 749                         TALLOC_FREE(subkeys);
 750                         return result;
 751                 }
 752         }
 753
 754         /* write this key and values out */
 755
 756         if (!store_reg_values(&registry_key, values)
 757             || !store_reg_keys(&registry_key, subkeys))
 758         {
 759                 DEBUG(0,("reg_load_tree: Failed to load %s!\n", topkeypath));
 760                 result = WERR_REG_IO_FAILURE;
 761         }
 762
 763         TALLOC_FREE(subkeys);
 764
 765         if (!W_ERROR_IS_OK(result)) {
 766                 return result;
 767         }
 768
 769         /* now continue to load each subkey registry tree */
 770
 771         key->subkey_index = 0;
 772         while ((subkey = regfio_fetch_subkey(regfile, key))) {
 773                 path = talloc_asprintf(regfile->mem_ctx,
 774                                        "%s\\%s",
 775                                        topkeypath,
 776                                        subkey->keyname);
 777                 if (path == NULL) {
 778                         return WERR_NOMEM;
 779                 }
 780                 result = reg_load_tree(regfile, path, subkey);
 781                 if (!W_ERROR_IS_OK(result)) {
 782                         break;
 783                 }
 784         }
 785
 786         return result;
 787 }
 788
 789 /*******************************************************************
 790  ********************************************************************/
 791
 792 static WERROR restore_registry_key(REGISTRY_KEY *krecord, const char *fname)
 793 {
 794         REGF_FILE *regfile;
 795         REGF_NK_REC *rootkey;
 796         WERROR result;
 797
 798         /* open the registry file....fail if the file already exists */
 799
 800         regfile = regfio_open(fname, (O_RDONLY), 0);
 801         if (regfile == NULL) {
 802                 DEBUG(0, ("restore_registry_key: failed to open \"%s\" (%s)\n",
 803                           fname, strerror(errno)));
 804                 return ntstatus_to_werror(map_nt_error_from_unix(errno));
 805         }
 806
 807         /* get the rootkey from the regf file and then load the tree
 808            via recursive calls */
 809
 810         if (!(rootkey = regfio_rootkey(regfile))) {
 811                 regfio_close(regfile);
 812                 return WERR_REG_FILE_INVALID;
 813         }
 814
 815         result = reg_load_tree(regfile, krecord->name, rootkey);
 816
 817         /* cleanup */
 818
 819         regfio_close(regfile);
 820
 821         return result;
 822 }
 823
 824 WERROR reg_restorekey(struct registry_key *key, const char *fname)
 825 {
 826         return restore_registry_key(key->key, fname);
 827 }
 828
 829 /********************************************************************
 830 ********************************************************************/
 831
 832 static WERROR reg_write_tree(REGF_FILE *regfile, const char *keypath,
 833                              REGF_NK_REC *parent)
 834 {
 835         REGF_NK_REC *key;
 836         REGVAL_CTR *values;
 837         struct regsubkey_ctr *subkeys;
 838         int i, num_subkeys;
 839         char *key_tmp = NULL;
 840         char *keyname, *parentpath;
 841         char *subkeypath = NULL;
 842         char *subkeyname;
 843         REGISTRY_KEY registry_key;
 844         WERROR result = WERR_OK;
 845         SEC_DESC *sec_desc = NULL;
 846
 847         if (!regfile) {
 848                 return WERR_GENERAL_FAILURE;
 849         }
 850
 851         if (!keypath) {
 852                 return WERR_OBJECT_PATH_INVALID;
 853         }
 854
 855         /* split up the registry key path */
 856
 857         key_tmp = talloc_strdup(regfile->mem_ctx, keypath);
 858         if (!key_tmp) {
 859                 return WERR_NOMEM;
 860         }
 861         if (!reg_split_key(key_tmp, &parentpath, &keyname)) {
 862                 return WERR_OBJECT_PATH_INVALID;
 863         }
 864
 865         if (!keyname) {
 866                 keyname = parentpath;
 867         }
 868
 869         /* we need a REGISTRY_KEY object here to enumerate subkeys and values */
 870
 871         ZERO_STRUCT(registry_key);
 872
 873         registry_key.name = talloc_strdup(regfile->mem_ctx, keypath);
 874         if (registry_key.name == NULL) {
 875                 return WERR_NOMEM;
 876         }
 877
 878         registry_key.ops = reghook_cache_find(registry_key.name);
 879         if (registry_key.ops == NULL) {
 880                 return WERR_BADFILE;
 881         }
 882
 883         /* lookup the values and subkeys */
 884
 885         result = regsubkey_ctr_init(regfile->mem_ctx, &subkeys);
 886         W_ERROR_NOT_OK_RETURN(result);
 887
 888         values = TALLOC_ZERO_P(subkeys, REGVAL_CTR);
 889         if (values == NULL) {
 890                 return WERR_NOMEM;
 891         }
 892
 893         fetch_reg_keys(&registry_key, subkeys);
 894         fetch_reg_values(&registry_key, values);
 895
 896         result = regkey_get_secdesc(regfile->mem_ctx, &registry_key, &sec_desc);
 897         if (!W_ERROR_IS_OK(result)) {
 898                 goto done;
 899         }
 900
 901         /* write out this key */
 902
 903         key = regfio_write_key(regfile, keyname, values, subkeys, sec_desc,
 904                                parent);
 905         if (key == NULL) {
 906                 result = WERR_CAN_NOT_COMPLETE;
 907                 goto done;
 908         }
 909
 910         /* write each one of the subkeys out */
 911
 912         num_subkeys = regsubkey_ctr_numkeys(subkeys);
 913         for (i=0; i<num_subkeys; i++) {
 914                 subkeyname = regsubkey_ctr_specific_key(subkeys, i);
 915                 subkeypath = talloc_asprintf(regfile->mem_ctx, "%s\\%s",
 916                                              keypath, subkeyname);
 917                 if (subkeypath == NULL) {
 918                         result = WERR_NOMEM;
 919                         goto done;
 920                 }
 921                 result = reg_write_tree(regfile, subkeypath, key);
 922                 if (!W_ERROR_IS_OK(result))
 923                         goto done;
 924         }
 925
 926         DEBUG(6, ("reg_write_tree: wrote key [%s]\n", keypath));
 927
 928 done:
 929         TALLOC_FREE(subkeys);
 930         TALLOC_FREE(registry_key.name);
 931
 932         return result;
 933 }
 934
 935 static WERROR backup_registry_key(REGISTRY_KEY *krecord, const char *fname)
 936 {
 937         REGF_FILE *regfile;
 938         WERROR result;
 939
 940         /* open the registry file....fail if the file already exists */
 941
 942         regfile = regfio_open(fname, (O_RDWR|O_CREAT|O_EXCL),
 943                               (S_IREAD|S_IWRITE));
 944         if (regfile == NULL) {
 945                 DEBUG(0,("backup_registry_key: failed to open \"%s\" (%s)\n",
 946                          fname, strerror(errno) ));
 947                 return ntstatus_to_werror(map_nt_error_from_unix(errno));
 948         }
 949
 950         /* write the registry tree to the file  */
 951
 952         result = reg_write_tree(regfile, krecord->name, NULL);
 953
 954         /* cleanup */
 955
 956         regfio_close(regfile);
 957
 958         return result;
 959 }
 960
 961 WERROR reg_savekey(struct registry_key *key, const char *fname)
 962 {
 963         return backup_registry_key(key->key, fname);
 964 }
 965
 966 /**********************************************************************
 967  * Higher level utility functions
 968  **********************************************************************/
 969
 970 WERROR reg_deleteallvalues(struct registry_key *key)
 971 {
 972         WERROR err;
 973         int i;
 974
 975         if (!(key->key->access_granted & SEC_RIGHTS_SET_VALUE)) {
 976                 return WERR_ACCESS_DENIED;
 977         }
 978
 979         if (!W_ERROR_IS_OK(err = fill_value_cache(key))) {
 980                 return err;
 981         }
 982
 983         for (i=0; i<key->values->num_values; i++) {
 984                 regval_ctr_delvalue(key->values, key->values->values[i]->valuename);
 985         }
 986
 987         if (!store_reg_values(key->key, key->values)) {
 988                 TALLOC_FREE(key->values);
 989                 return WERR_REG_IO_FAILURE;
 990         }
 991
 992         return WERR_OK;
 993 }
 994
 995 /*
 996  * Utility function to open a complete registry path including the hive prefix.
 997  */
 998
 999 WERROR reg_open_path(TALLOC_CTX *mem_ctx, const char *orig_path,
1000                      uint32 desired_access, const struct nt_user_token *token,
1001                      struct registry_key **pkey)
1002 {
1003         struct registry_key *hive, *key;
1004         char *path, *p;
1005         WERROR err;
1006
1007         if (!(path = SMB_STRDUP(orig_path))) {
1008                 return WERR_NOMEM;
1009         }
1010
1011         p = strchr(path, '\\');
1012
1013         if ((p == NULL) || (p[1] == '\0')) {
1014                 /*
1015                  * No key behind the hive, just return the hive
1016                  */
1017
1018                 err = reg_openhive(mem_ctx, path, desired_access, token,
1019                                    &hive);
1020                 if (!W_ERROR_IS_OK(err)) {
1021                         SAFE_FREE(path);
1022                         return err;
1023                 }
1024                 SAFE_FREE(path);
1025                 *pkey = hive;
1026                 return WERR_OK;
1027         }
1028
1029         *p = '\0';
1030
1031         err = reg_openhive(mem_ctx, path, SEC_RIGHTS_ENUM_SUBKEYS, token,
1032                            &hive);
1033         if (!W_ERROR_IS_OK(err)) {
1034                 SAFE_FREE(path);
1035                 return err;
1036         }
1037
1038         err = reg_openkey(mem_ctx, hive, p+1, desired_access, &key);
1039
1040         TALLOC_FREE(hive);
1041         SAFE_FREE(path);
1042
1043         if (!W_ERROR_IS_OK(err)) {
1044                 return err;
1045         }
1046
1047         *pkey = key;
1048         return WERR_OK;
1049 }
1050
1051 /*
1052  * Utility function to delete a registry key with all its subkeys.
1053  * Note that reg_deletekey returns ACCESS_DENIED when called on a
1054  * key that has subkeys.
1055  */
1056 static WERROR reg_deletekey_recursive_internal(TALLOC_CTX *ctx,
1057                                                struct registry_key *parent,
1058                                                const char *path,
1059                                                bool del_key)
1060 {
1061         TALLOC_CTX *mem_ctx = NULL;
1062         WERROR werr = WERR_OK;
1063         struct registry_key *key;
1064         char *subkey_name = NULL;
1065
1066         mem_ctx = talloc_new(ctx);
1067         if (mem_ctx == NULL) {
1068                 werr = WERR_NOMEM;
1069                 goto done;
1070         }
1071
1072         /* recurse through subkeys first */
1073         werr = reg_openkey(mem_ctx, parent, path, REG_KEY_ALL, &key);
1074         if (!W_ERROR_IS_OK(werr)) {
1075                 goto done;
1076         }
1077
1078         while (W_ERROR_IS_OK(werr = reg_enumkey(mem_ctx, key, 0,
1079                                                 &subkey_name, NULL)))
1080         {
1081                 werr = reg_deletekey_recursive_internal(mem_ctx, key,
1082                                                         subkey_name,
1083                                                         true);
1084                 if (!W_ERROR_IS_OK(werr)) {
1085                         goto done;
1086                 }
1087         }
1088         if (!W_ERROR_EQUAL(WERR_NO_MORE_ITEMS, werr)) {
1089                 DEBUG(1, ("reg_deletekey_recursive_internal: "
1090                           "Error enumerating subkeys: %s\n",
1091                           win_errstr(werr)));
1092                 goto done;
1093         }
1094
1095         werr = WERR_OK;
1096
1097         if (del_key) {
1098                 /* now delete the actual key */
1099                 werr = reg_deletekey(parent, path);
1100         }
1101
1102 done:
1103         TALLOC_FREE(mem_ctx);
1104         return werr;
1105 }
1106
1107 static WERROR reg_deletekey_recursive_trans(TALLOC_CTX *ctx,
1108                                             struct registry_key *parent,
1109                                             const char *path,
1110                                             bool del_key)
1111 {
1112         WERROR werr;
1113
1114         werr = regdb_transaction_start();
1115         if (!W_ERROR_IS_OK(werr)) {
1116                 DEBUG(0, ("reg_deletekey_recursive_trans: "
1117                           "error starting transaction: %s\n",
1118                           win_errstr(werr)));
1119                 return werr;
1120         }
1121
1122         werr = reg_deletekey_recursive_internal(ctx, parent, path, del_key);
1123
1124         if (!W_ERROR_IS_OK(werr)) {
1125                 DEBUG(1, (__location__ " failed to delete key '%s' from key "
1126                           "'%s': %s\n", path, parent->key->name,
1127                           win_errstr(werr)));
1128                 werr = regdb_transaction_cancel();
1129                 if (!W_ERROR_IS_OK(werr)) {
1130                         DEBUG(0, ("reg_deletekey_recursive_trans: "
1131                                   "error cancelling transaction: %s\n",
1132                                   win_errstr(werr)));
1133                 }
1134         } else {
1135                 werr = regdb_transaction_commit();
1136                 if (!W_ERROR_IS_OK(werr)) {
1137                         DEBUG(0, ("reg_deletekey_recursive_trans: "
1138                                   "error committing transaction: %s\n",
1139                                   win_errstr(werr)));
1140                 }
1141         }
1142
1143         return werr;
1144 }
1145
1146 WERROR reg_deletekey_recursive(TALLOC_CTX *ctx,
1147                                struct registry_key *parent,
1148                                const char *path)
1149 {
1150         return reg_deletekey_recursive_trans(ctx, parent, path, true);
1151 }
1152
1153 WERROR reg_deletesubkeys_recursive(TALLOC_CTX *ctx,
1154                                    struct registry_key *parent,
1155                                    const char *path)
1156 {
1157         return reg_deletekey_recursive_trans(ctx, parent, path, false);
1158 }
1159
1160 #if 0
1161 /* these two functions are unused. */
1162
1163 /**
1164  * Utility function to create a registry key without opening the hive
1165  * before. Assumes the hive already exists.
1166  */
1167
1168 WERROR reg_create_path(TALLOC_CTX *mem_ctx, const char *orig_path,
1169                        uint32 desired_access,
1170                        const struct nt_user_token *token,
1171                        enum winreg_CreateAction *paction,
1172                        struct registry_key **pkey)
1173 {
1174         struct registry_key *hive;
1175         char *path, *p;
1176         WERROR err;
1177
1178         if (!(path = SMB_STRDUP(orig_path))) {
1179                 return WERR_NOMEM;
1180         }
1181
1182         p = strchr(path, '\\');
1183
1184         if ((p == NULL) || (p[1] == '\0')) {
1185                 /*
1186                  * No key behind the hive, just return the hive
1187                  */
1188
1189                 err = reg_openhive(mem_ctx, path, desired_access, token,
1190                                    &hive);
1191                 if (!W_ERROR_IS_OK(err)) {
1192                         SAFE_FREE(path);
1193                         return err;
1194                 }
1195                 SAFE_FREE(path);
1196                 *pkey = hive;
1197                 *paction = REG_OPENED_EXISTING_KEY;
1198                 return WERR_OK;
1199         }
1200
1201         *p = '\0';
1202
1203         err = reg_openhive(mem_ctx, path,
1204                            (strchr(p+1, '\\') != NULL) ?
1205                            SEC_RIGHTS_ENUM_SUBKEYS : SEC_RIGHTS_CREATE_SUBKEY,
1206                            token, &hive);
1207         if (!W_ERROR_IS_OK(err)) {
1208                 SAFE_FREE(path);
1209                 return err;
1210         }
1211
1212         err = reg_createkey(mem_ctx, hive, p+1, desired_access, pkey, paction);
1213         SAFE_FREE(path);
1214         TALLOC_FREE(hive);
1215         return err;
1216 }
1217
1218 /*
1219  * Utility function to create a registry key without opening the hive
1220  * before. Will not delete a hive.
1221  */
1222
1223 WERROR reg_delete_path(const struct nt_user_token *token,
1224                        const char *orig_path)
1225 {
1226         struct registry_key *hive;
1227         char *path, *p;
1228         WERROR err;
1229
1230         if (!(path = SMB_STRDUP(orig_path))) {
1231                 return WERR_NOMEM;
1232         }
1233
1234         p = strchr(path, '\\');
1235
1236         if ((p == NULL) || (p[1] == '\0')) {
1237                 SAFE_FREE(path);
1238                 return WERR_INVALID_PARAM;
1239         }
1240
1241         *p = '\0';
1242
1243         err = reg_openhive(NULL, path,
1244                            (strchr(p+1, '\\') != NULL) ?
1245                            SEC_RIGHTS_ENUM_SUBKEYS : SEC_RIGHTS_CREATE_SUBKEY,
1246                            token, &hive);
1247         if (!W_ERROR_IS_OK(err)) {
1248                 SAFE_FREE(path);
1249                 return err;
1250         }
1251
1252         err = reg_deletekey(hive, p+1);
1253         SAFE_FREE(path);
1254         TALLOC_FREE(hive);
1255         return err;
1256 }
1257 #endif /* #if 0 */