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 "registry.h"
  67 #include "reg_cachehook.h"
  68 #include "regfio.h"
  69 #include "reg_util_internal.h"
  70 #include "reg_backend_db.h"
  71 #include "reg_dispatcher.h"
  72 #include "reg_util_marshalling.h"
  73 #include "reg_objects.h"
  74 #include "../librpc/gen_ndr/ndr_security.h"
  75
  76 #undef DBGC_CLASS
  77 #define DBGC_CLASS DBGC_REGISTRY
  78
  79
  80 /**********************************************************************
  81  * Helper functions
  82  **********************************************************************/
  83
  84 static WERROR fill_value_cache(struct registry_key *key)
  85 {
  86         WERROR werr;
  87
  88         if (key->values != NULL) {
  89                 if (!reg_values_need_update(key->key, key->values)) {
  90                         return WERR_OK;
  91                 }
  92         }
  93
  94         werr = regval_ctr_init(key, &(key->values));
  95         W_ERROR_NOT_OK_RETURN(werr);
  96
  97         if (fetch_reg_values(key->key, key->values) == -1) {
  98                 TALLOC_FREE(key->values);
  99                 return WERR_BADFILE;
 100         }
 101
 102         return WERR_OK;
 103 }
 104
 105 static WERROR fill_subkey_cache(struct registry_key *key)
 106 {
 107         WERROR werr;
 108
 109         if (key->subkeys != NULL) {
 110                 if (!reg_subkeys_need_update(key->key, key->subkeys)) {
 111                         return WERR_OK;
 112                 }
 113         }
 114
 115         werr = regsubkey_ctr_init(key, &(key->subkeys));
 116         W_ERROR_NOT_OK_RETURN(werr);
 117
 118         if (fetch_reg_keys(key->key, key->subkeys) == -1) {
 119                 TALLOC_FREE(key->subkeys);
 120                 return WERR_NO_MORE_ITEMS;
 121         }
 122
 123         return WERR_OK;
 124 }
 125
 126 static int regkey_destructor(struct registry_key_handle *key)
 127 {
 128         return regdb_close();
 129 }
 130
 131 static WERROR regkey_open_onelevel(TALLOC_CTX *mem_ctx,
 132                                    struct registry_key *parent,
 133                                    const char *name,
 134                                    const struct nt_user_token *token,
 135                                    uint32 access_desired,
 136                                    struct registry_key **pregkey)
 137 {
 138         WERROR          result = WERR_OK;
 139         struct registry_key *regkey;
 140         struct registry_key_handle *key;
 141         struct regsubkey_ctr    *subkeys = NULL;
 142
 143         DEBUG(7,("regkey_open_onelevel: name = [%s]\n", name));
 144
 145         SMB_ASSERT(strchr(name, '\\') == NULL);
 146
 147         if (!(regkey = TALLOC_ZERO_P(mem_ctx, struct registry_key)) ||
 148             !(regkey->token = dup_nt_token(regkey, token)) ||
 149             !(regkey->key = TALLOC_ZERO_P(regkey, struct registry_key_handle)))
 150         {
 151                 result = WERR_NOMEM;
 152                 goto done;
 153         }
 154
 155         if ( !(W_ERROR_IS_OK(result = regdb_open())) ) {
 156                 goto done;
 157         }
 158
 159         key = regkey->key;
 160         talloc_set_destructor(key, regkey_destructor);
 161
 162         /* initialization */
 163
 164         key->type = REG_KEY_GENERIC;
 165
 166         if (name[0] == '\0') {
 167                 /*
 168                  * Open a copy of the parent key
 169                  */
 170                 if (!parent) {
 171                         result = WERR_BADFILE;
 172                         goto done;
 173                 }
 174                 key->name = talloc_strdup(key, parent->key->name);
 175         }
 176         else {
 177                 /*
 178                  * Normal subkey open
 179                  */
 180                 key->name = talloc_asprintf(key, "%s%s%s",
 181                                             parent ? parent->key->name : "",
 182                                             parent ? "\\": "",
 183                                             name);
 184         }
 185
 186         if (key->name == NULL) {
 187                 result = WERR_NOMEM;
 188                 goto done;
 189         }
 190
 191         /* Tag this as a Performance Counter Key */
 192
 193         if( StrnCaseCmp(key->name, KEY_HKPD, strlen(KEY_HKPD)) == 0 )
 194                 key->type = REG_KEY_HKPD;
 195
 196         /* Look up the table of registry I/O operations */
 197
 198         if ( !(key->ops = reghook_cache_find( key->name )) ) {
 199                 DEBUG(0,("reg_open_onelevel: Failed to assign "
 200                          "registry_ops to [%s]\n", key->name ));
 201                 result = WERR_BADFILE;
 202                 goto done;
 203         }
 204
 205         /* check if the path really exists; failed is indicated by -1 */
 206         /* if the subkey count failed, bail out */
 207
 208         result = regsubkey_ctr_init(key, &subkeys);
 209         if (!W_ERROR_IS_OK(result)) {
 210                 goto done;
 211         }
 212
 213         if ( fetch_reg_keys( key, subkeys ) == -1 )  {
 214                 result = WERR_BADFILE;
 215                 goto done;
 216         }
 217
 218         TALLOC_FREE( subkeys );
 219
 220         if ( !regkey_access_check( key, access_desired, &key->access_granted,
 221                                    token ) ) {
 222                 result = WERR_ACCESS_DENIED;
 223                 goto done;
 224         }
 225
 226         *pregkey = regkey;
 227         result = WERR_OK;
 228
 229 done:
 230         if ( !W_ERROR_IS_OK(result) ) {
 231                 TALLOC_FREE(regkey);
 232         }
 233
 234         return result;
 235 }
 236
 237 WERROR reg_openhive(TALLOC_CTX *mem_ctx, const char *hive,
 238                     uint32 desired_access,
 239                     const struct nt_user_token *token,
 240                     struct registry_key **pkey)
 241 {
 242         SMB_ASSERT(hive != NULL);
 243         SMB_ASSERT(hive[0] != '\0');
 244         SMB_ASSERT(strchr(hive, '\\') == NULL);
 245
 246         return regkey_open_onelevel(mem_ctx, NULL, hive, token, desired_access,
 247                                     pkey);
 248 }
 249
 250
 251 /**********************************************************************
 252  * The API functions
 253  **********************************************************************/
 254
 255 WERROR reg_openkey(TALLOC_CTX *mem_ctx, struct registry_key *parent,
 256                    const char *name, uint32 desired_access,
 257                    struct registry_key **pkey)
 258 {
 259         struct registry_key *direct_parent = parent;
 260         WERROR err;
 261         char *p, *path, *to_free;
 262         size_t len;
 263
 264         if (!(path = SMB_STRDUP(name))) {
 265                 return WERR_NOMEM;
 266         }
 267         to_free = path;
 268
 269         len = strlen(path);
 270
 271         if ((len > 0) && (path[len-1] == '\\')) {
 272                 path[len-1] = '\0';
 273         }
 274
 275         while ((p = strchr(path, '\\')) != NULL) {
 276                 char *name_component;
 277                 struct registry_key *tmp;
 278
 279                 if (!(name_component = SMB_STRNDUP(path, (p - path)))) {
 280                         err = WERR_NOMEM;
 281                         goto error;
 282                 }
 283
 284                 err = regkey_open_onelevel(mem_ctx, direct_parent,
 285                                            name_component, parent->token,
 286                                            KEY_ENUMERATE_SUB_KEYS, &tmp);
 287                 SAFE_FREE(name_component);
 288
 289                 if (!W_ERROR_IS_OK(err)) {
 290                         goto error;
 291                 }
 292                 if (direct_parent != parent) {
 293                         TALLOC_FREE(direct_parent);
 294                 }
 295
 296                 direct_parent = tmp;
 297                 path = p+1;
 298         }
 299
 300         err = regkey_open_onelevel(mem_ctx, direct_parent, path, parent->token,
 301                                    desired_access, pkey);
 302  error:
 303         if (direct_parent != parent) {
 304                 TALLOC_FREE(direct_parent);
 305         }
 306         SAFE_FREE(to_free);
 307         return err;
 308 }
 309
 310 WERROR reg_enumkey(TALLOC_CTX *mem_ctx, struct registry_key *key,
 311                    uint32 idx, char **name, NTTIME *last_write_time)
 312 {
 313         WERROR err;
 314
 315         if (!(key->key->access_granted & KEY_ENUMERATE_SUB_KEYS)) {
 316                 return WERR_ACCESS_DENIED;
 317         }
 318
 319         if (!W_ERROR_IS_OK(err = fill_subkey_cache(key))) {
 320                 return err;
 321         }
 322
 323         if (idx >= regsubkey_ctr_numkeys(key->subkeys)) {
 324                 return WERR_NO_MORE_ITEMS;
 325         }
 326
 327         if (!(*name = talloc_strdup(mem_ctx,
 328                         regsubkey_ctr_specific_key(key->subkeys, idx))))
 329         {
 330                 return WERR_NOMEM;
 331         }
 332
 333         if (last_write_time) {
 334                 *last_write_time = 0;
 335         }
 336
 337         return WERR_OK;
 338 }
 339
 340 WERROR reg_enumvalue(TALLOC_CTX *mem_ctx, struct registry_key *key,
 341                      uint32 idx, char **pname, struct registry_value **pval)
 342 {
 343         struct registry_value *val;
 344         struct regval_blob *blob;
 345         WERROR err;
 346
 347         if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
 348                 return WERR_ACCESS_DENIED;
 349         }
 350
 351         if (!(W_ERROR_IS_OK(err = fill_value_cache(key)))) {
 352                 return err;
 353         }
 354
 355         if (idx >= regval_ctr_numvals(key->values)) {
 356                 return WERR_NO_MORE_ITEMS;
 357         }
 358
 359         blob = regval_ctr_specific_value(key->values, idx);
 360         err = registry_pull_value(mem_ctx, &val,
 361                                   regval_type(blob),
 362                                   regval_data_p(blob),
 363                                   regval_size(blob),
 364                                   regval_size(blob));
 365         if (!W_ERROR_IS_OK(err)) {
 366                 return err;
 367         }
 368
 369         if (pname
 370             && !(*pname = talloc_strdup(
 371                          mem_ctx, regval_name(blob)))) {
 372                 SAFE_FREE(val);
 373                 return WERR_NOMEM;
 374         }
 375
 376         *pval = val;
 377         return WERR_OK;
 378 }
 379
 380 WERROR reg_queryvalue(TALLOC_CTX *mem_ctx, struct registry_key *key,
 381                       const char *name, struct registry_value **pval)
 382 {
 383         WERROR err;
 384         uint32 i;
 385
 386         if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
 387                 return WERR_ACCESS_DENIED;
 388         }
 389
 390         if (!(W_ERROR_IS_OK(err = fill_value_cache(key)))) {
 391                 return err;
 392         }
 393
 394         for (i=0; i < regval_ctr_numvals(key->values); i++) {
 395                 struct regval_blob *blob;
 396                 blob = regval_ctr_specific_value(key->values, i);
 397                 if (strequal(regval_name(blob), name)) {
 398                         return reg_enumvalue(mem_ctx, key, i, NULL, pval);
 399                 }
 400         }
 401
 402         return WERR_BADFILE;
 403 }
 404
 405 WERROR reg_querymultiplevalues(TALLOC_CTX *mem_ctx,
 406                                struct registry_key *key,
 407                                uint32_t num_names,
 408                                const char **names,
 409                                uint32_t *pnum_vals,
 410                                struct registry_value **pvals)
 411 {
 412         WERROR err;
 413         uint32_t i, n, found = 0;
 414         struct registry_value *vals;
 415
 416         if (num_names == 0) {
 417                 return WERR_OK;
 418         }
 419
 420         if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
 421                 return WERR_ACCESS_DENIED;
 422         }
 423
 424         if (!(W_ERROR_IS_OK(err = fill_value_cache(key)))) {
 425                 return err;
 426         }
 427
 428         vals = talloc_zero_array(mem_ctx, struct registry_value, num_names);
 429         if (vals == NULL) {
 430                 return WERR_NOMEM;
 431         }
 432
 433         for (n=0; n < num_names; n++) {
 434                 for (i=0; i < regval_ctr_numvals(key->values); i++) {
 435                         struct regval_blob *blob;
 436                         blob = regval_ctr_specific_value(key->values, i);
 437                         if (strequal(regval_name(blob), names[n])) {
 438                                 struct registry_value *v;
 439                                 err = reg_enumvalue(mem_ctx, key, i, NULL, &v);
 440                                 if (!W_ERROR_IS_OK(err)) {
 441                                         return err;
 442                                 }
 443                                 vals[n] = *v;
 444                                 found++;
 445                         }
 446                 }
 447         }
 448
 449         *pvals = vals;
 450         *pnum_vals = found;
 451
 452         return WERR_OK;
 453 }
 454
 455 WERROR reg_queryinfokey(struct registry_key *key, uint32_t *num_subkeys,
 456                         uint32_t *max_subkeylen, uint32_t *max_subkeysize,
 457                         uint32_t *num_values, uint32_t *max_valnamelen,
 458                         uint32_t *max_valbufsize, uint32_t *secdescsize,
 459                         NTTIME *last_changed_time)
 460 {
 461         uint32 i, max_size;
 462         size_t max_len;
 463         TALLOC_CTX *mem_ctx;
 464         WERROR err;
 465         struct security_descriptor *secdesc;
 466
 467         if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
 468                 return WERR_ACCESS_DENIED;
 469         }
 470
 471         if (!W_ERROR_IS_OK(fill_subkey_cache(key)) ||
 472             !W_ERROR_IS_OK(fill_value_cache(key))) {
 473                 return WERR_BADFILE;
 474         }
 475
 476         max_len = 0;
 477         for (i=0; i< regsubkey_ctr_numkeys(key->subkeys); i++) {
 478                 max_len = MAX(max_len,
 479                         strlen(regsubkey_ctr_specific_key(key->subkeys, i)));
 480         }
 481
 482         *num_subkeys = regsubkey_ctr_numkeys(key->subkeys);
 483         *max_subkeylen = max_len;
 484         *max_subkeysize = 0;    /* Class length? */
 485
 486         max_len = 0;
 487         max_size = 0;
 488         for (i=0; i < regval_ctr_numvals(key->values); i++) {
 489                 struct regval_blob *blob;
 490                 blob = regval_ctr_specific_value(key->values, i);
 491                 max_len = MAX(max_len, strlen(regval_name(blob)));
 492                 max_size = MAX(max_size, regval_size(blob));
 493         }
 494
 495         *num_values = regval_ctr_numvals(key->values);
 496         *max_valnamelen = max_len;
 497         *max_valbufsize = max_size;
 498
 499         if (!(mem_ctx = talloc_new(key))) {
 500                 return WERR_NOMEM;
 501         }
 502
 503         err = regkey_get_secdesc(mem_ctx, key->key, &secdesc);
 504         if (!W_ERROR_IS_OK(err)) {
 505                 TALLOC_FREE(mem_ctx);
 506                 return err;
 507         }
 508
 509         *secdescsize = ndr_size_security_descriptor(secdesc, 0);
 510         TALLOC_FREE(mem_ctx);
 511
 512         *last_changed_time = 0;
 513
 514         return WERR_OK;
 515 }
 516
 517 WERROR reg_createkey(TALLOC_CTX *ctx, struct registry_key *parent,
 518                      const char *subkeypath, uint32 desired_access,
 519                      struct registry_key **pkey,
 520                      enum winreg_CreateAction *paction)
 521 {
 522         struct registry_key *key = parent;
 523         struct registry_key *create_parent;
 524         TALLOC_CTX *mem_ctx;
 525         char *path, *end;
 526         WERROR err;
 527
 528         if (!(mem_ctx = talloc_new(ctx))) return WERR_NOMEM;
 529
 530         if (!(path = talloc_strdup(mem_ctx, subkeypath))) {
 531                 err = WERR_NOMEM;
 532                 goto done;
 533         }
 534
 535         while ((end = strchr(path, '\\')) != NULL) {
 536                 struct registry_key *tmp;
 537                 enum winreg_CreateAction action;
 538
 539                 *end = '\0';
 540
 541                 err = reg_createkey(mem_ctx, key, path,
 542                                     KEY_ENUMERATE_SUB_KEYS, &tmp, &action);
 543                 if (!W_ERROR_IS_OK(err)) {
 544                         goto done;
 545                 }
 546
 547                 if (key != parent) {
 548                         TALLOC_FREE(key);
 549                 }
 550
 551                 key = tmp;
 552                 path = end+1;
 553         }
 554
 555         /*
 556          * At this point, "path" contains the one-element subkey of "key". We
 557          * can try to open it.
 558          */
 559
 560         err = reg_openkey(ctx, key, path, desired_access, pkey);
 561         if (W_ERROR_IS_OK(err)) {
 562                 if (paction != NULL) {
 563                         *paction = REG_OPENED_EXISTING_KEY;
 564                 }
 565                 goto done;
 566         }
 567
 568         if (!W_ERROR_EQUAL(err, WERR_BADFILE)) {
 569                 /*
 570                  * Something but "notfound" has happened, so bail out
 571                  */
 572                 goto done;
 573         }
 574
 575         /*
 576          * We have to make a copy of the current key, as we opened it only
 577          * with ENUM_SUBKEY access.
 578          */
 579
 580         err = reg_openkey(mem_ctx, key, "", KEY_CREATE_SUB_KEY,
 581                           &create_parent);
 582         if (!W_ERROR_IS_OK(err)) {
 583                 goto done;
 584         }
 585
 586         /*
 587          * Actually create the subkey
 588          */
 589
 590         err = fill_subkey_cache(create_parent);
 591         if (!W_ERROR_IS_OK(err)) goto done;
 592
 593         err = create_reg_subkey(key->key, path);
 594         W_ERROR_NOT_OK_GOTO_DONE(err);
 595
 596         /*
 597          * Now open the newly created key
 598          */
 599
 600         err = reg_openkey(ctx, create_parent, path, desired_access, pkey);
 601         if (W_ERROR_IS_OK(err) && (paction != NULL)) {
 602                 *paction = REG_CREATED_NEW_KEY;
 603         }
 604
 605  done:
 606         TALLOC_FREE(mem_ctx);
 607         return err;
 608 }
 609
 610 WERROR reg_deletekey(struct registry_key *parent, const char *path)
 611 {
 612         WERROR err;
 613         char *name, *end;
 614         struct registry_key *tmp_key, *key;
 615         TALLOC_CTX *mem_ctx = talloc_stackframe();
 616
 617         name = talloc_strdup(mem_ctx, path);
 618         if (name == NULL) {
 619                 err = WERR_NOMEM;
 620                 goto done;
 621         }
 622
 623         /* check if the key has subkeys */
 624         err = reg_openkey(mem_ctx, parent, name, REG_KEY_READ, &key);
 625         W_ERROR_NOT_OK_GOTO_DONE(err);
 626
 627         err = fill_subkey_cache(key);
 628         W_ERROR_NOT_OK_GOTO_DONE(err);
 629
 630         if (regsubkey_ctr_numkeys(key->subkeys) > 0) {
 631                 err = WERR_ACCESS_DENIED;
 632                 goto done;
 633         }
 634
 635         /* no subkeys - proceed with delete */
 636         end = strrchr(name, '\\');
 637         if (end != NULL) {
 638                 *end = '\0';
 639
 640                 err = reg_openkey(mem_ctx, parent, name,
 641                                   KEY_CREATE_SUB_KEY, &tmp_key);
 642                 W_ERROR_NOT_OK_GOTO_DONE(err);
 643
 644                 parent = tmp_key;
 645                 name = end+1;
 646         }
 647
 648         if (name[0] == '\0') {
 649                 err = WERR_INVALID_PARAM;
 650                 goto done;
 651         }
 652
 653         err = delete_reg_subkey(parent->key, name);
 654
 655 done:
 656         TALLOC_FREE(mem_ctx);
 657         return err;
 658 }
 659
 660 WERROR reg_setvalue(struct registry_key *key, const char *name,
 661                     const struct registry_value *val)
 662 {
 663         WERROR err;
 664         DATA_BLOB value_data;
 665         int res;
 666
 667         if (!(key->key->access_granted & KEY_SET_VALUE)) {
 668                 return WERR_ACCESS_DENIED;
 669         }
 670
 671         if (!W_ERROR_IS_OK(err = fill_value_cache(key))) {
 672                 return err;
 673         }
 674
 675         err = registry_push_value(key, val, &value_data);
 676         if (!W_ERROR_IS_OK(err)) {
 677                 return err;
 678         }
 679
 680         res = regval_ctr_addvalue(key->values, name, val->type,
 681                                   value_data.data, value_data.length);
 682         TALLOC_FREE(value_data.data);
 683
 684         if (res == 0) {
 685                 TALLOC_FREE(key->values);
 686                 return WERR_NOMEM;
 687         }
 688
 689         if (!store_reg_values(key->key, key->values)) {
 690                 TALLOC_FREE(key->values);
 691                 return WERR_REG_IO_FAILURE;
 692         }
 693
 694         return WERR_OK;
 695 }
 696
 697 static WERROR reg_value_exists(struct registry_key *key, const char *name)
 698 {
 699         struct regval_blob *blob;
 700
 701         blob = regval_ctr_getvalue(key->values, name);
 702
 703         if (blob == NULL) {
 704                 return WERR_BADFILE;
 705         } else {
 706                 return WERR_OK;
 707         }
 708 }
 709
 710 WERROR reg_deletevalue(struct registry_key *key, const char *name)
 711 {
 712         WERROR err;
 713
 714         if (!(key->key->access_granted & KEY_SET_VALUE)) {
 715                 return WERR_ACCESS_DENIED;
 716         }
 717
 718         if (!W_ERROR_IS_OK(err = fill_value_cache(key))) {
 719                 return err;
 720         }
 721
 722         err = reg_value_exists(key, name);
 723         if (!W_ERROR_IS_OK(err)) {
 724                 return err;
 725         }
 726
 727         regval_ctr_delvalue(key->values, name);
 728
 729         if (!store_reg_values(key->key, key->values)) {
 730                 TALLOC_FREE(key->values);
 731                 return WERR_REG_IO_FAILURE;
 732         }
 733
 734         return WERR_OK;
 735 }
 736
 737 WERROR reg_getkeysecurity(TALLOC_CTX *mem_ctx, struct registry_key *key,
 738                           struct security_descriptor **psecdesc)
 739 {
 740         return regkey_get_secdesc(mem_ctx, key->key, psecdesc);
 741 }
 742
 743 WERROR reg_setkeysecurity(struct registry_key *key,
 744                           struct security_descriptor *psecdesc)
 745 {
 746         return regkey_set_secdesc(key->key, psecdesc);
 747 }
 748
 749 WERROR reg_getversion(uint32_t *version)
 750 {
 751         if (version == NULL) {
 752                 return WERR_INVALID_PARAM;
 753         }
 754
 755         *version = 0x00000005; /* Windows 2000 registry API version */
 756         return WERR_OK;
 757 }
 758
 759 /*******************************************************************
 760  Note: topkeypat is the *full* path that this *key will be
 761  loaded into (including the name of the key)
 762  ********************************************************************/
 763
 764 static WERROR reg_load_tree(REGF_FILE *regfile, const char *topkeypath,
 765                             REGF_NK_REC *key)
 766 {
 767         REGF_NK_REC *subkey;
 768         struct registry_key_handle registry_key;
 769         struct regval_ctr *values;
 770         struct regsubkey_ctr *subkeys;
 771         int i;
 772         char *path = NULL;
 773         WERROR result = WERR_OK;
 774
 775         /* initialize the struct registry_key_handle structure */
 776
 777         registry_key.ops = reghook_cache_find(topkeypath);
 778         if (!registry_key.ops) {
 779                 DEBUG(0, ("reg_load_tree: Failed to assign registry_ops "
 780                           "to [%s]\n", topkeypath));
 781                 return WERR_BADFILE;
 782         }
 783
 784         registry_key.name = talloc_strdup(regfile->mem_ctx, topkeypath);
 785         if (!registry_key.name) {
 786                 DEBUG(0, ("reg_load_tree: Talloc failed for reg_key.name!\n"));
 787                 return WERR_NOMEM;
 788         }
 789
 790         /* now start parsing the values and subkeys */
 791
 792         result = regsubkey_ctr_init(regfile->mem_ctx, &subkeys);
 793         W_ERROR_NOT_OK_RETURN(result);
 794
 795         result = regval_ctr_init(subkeys, &values);
 796         W_ERROR_NOT_OK_RETURN(result);
 797
 798         /* copy values into the struct regval_ctr */
 799
 800         for (i=0; i<key->num_values; i++) {
 801                 regval_ctr_addvalue(values, key->values[i].valuename,
 802                                     key->values[i].type,
 803                                     key->values[i].data,
 804                                     (key->values[i].data_size & ~VK_DATA_IN_OFFSET));
 805         }
 806
 807         /* copy subkeys into the struct regsubkey_ctr */
 808
 809         key->subkey_index = 0;
 810         while ((subkey = regfio_fetch_subkey( regfile, key ))) {
 811                 result = regsubkey_ctr_addkey(subkeys, subkey->keyname);
 812                 if (!W_ERROR_IS_OK(result)) {
 813                         TALLOC_FREE(subkeys);
 814                         return result;
 815                 }
 816         }
 817
 818         /* write this key and values out */
 819
 820         if (!store_reg_values(&registry_key, values)
 821             || !store_reg_keys(&registry_key, subkeys))
 822         {
 823                 DEBUG(0,("reg_load_tree: Failed to load %s!\n", topkeypath));
 824                 result = WERR_REG_IO_FAILURE;
 825         }
 826
 827         TALLOC_FREE(subkeys);
 828
 829         if (!W_ERROR_IS_OK(result)) {
 830                 return result;
 831         }
 832
 833         /* now continue to load each subkey registry tree */
 834
 835         key->subkey_index = 0;
 836         while ((subkey = regfio_fetch_subkey(regfile, key))) {
 837                 path = talloc_asprintf(regfile->mem_ctx,
 838                                        "%s\\%s",
 839                                        topkeypath,
 840                                        subkey->keyname);
 841                 if (path == NULL) {
 842                         return WERR_NOMEM;
 843                 }
 844                 result = reg_load_tree(regfile, path, subkey);
 845                 if (!W_ERROR_IS_OK(result)) {
 846                         break;
 847                 }
 848         }
 849
 850         return result;
 851 }
 852
 853 /*******************************************************************
 854  ********************************************************************/
 855
 856 static WERROR restore_registry_key(struct registry_key_handle *krecord,
 857                                    const char *fname)
 858 {
 859         REGF_FILE *regfile;
 860         REGF_NK_REC *rootkey;
 861         WERROR result;
 862
 863         /* open the registry file....fail if the file already exists */
 864
 865         regfile = regfio_open(fname, (O_RDONLY), 0);
 866         if (regfile == NULL) {
 867                 DEBUG(0, ("restore_registry_key: failed to open \"%s\" (%s)\n",
 868                           fname, strerror(errno)));
 869                 return ntstatus_to_werror(map_nt_error_from_unix(errno));
 870         }
 871
 872         /* get the rootkey from the regf file and then load the tree
 873            via recursive calls */
 874
 875         if (!(rootkey = regfio_rootkey(regfile))) {
 876                 regfio_close(regfile);
 877                 return WERR_REG_FILE_INVALID;
 878         }
 879
 880         result = reg_load_tree(regfile, krecord->name, rootkey);
 881
 882         /* cleanup */
 883
 884         regfio_close(regfile);
 885
 886         return result;
 887 }
 888
 889 WERROR reg_restorekey(struct registry_key *key, const char *fname)
 890 {
 891         return restore_registry_key(key->key, fname);
 892 }
 893
 894 /********************************************************************
 895 ********************************************************************/
 896
 897 static WERROR reg_write_tree(REGF_FILE *regfile, const char *keypath,
 898                              REGF_NK_REC *parent)
 899 {
 900         REGF_NK_REC *key;
 901         struct regval_ctr *values;
 902         struct regsubkey_ctr *subkeys;
 903         int i, num_subkeys;
 904         char *key_tmp = NULL;
 905         char *keyname, *parentpath;
 906         char *subkeypath = NULL;
 907         char *subkeyname;
 908         struct registry_key_handle registry_key;
 909         WERROR result = WERR_OK;
 910         struct security_descriptor *sec_desc = NULL;
 911
 912         if (!regfile) {
 913                 return WERR_GENERAL_FAILURE;
 914         }
 915
 916         if (!keypath) {
 917                 return WERR_OBJECT_PATH_INVALID;
 918         }
 919
 920         /* split up the registry key path */
 921
 922         key_tmp = talloc_strdup(regfile->mem_ctx, keypath);
 923         if (!key_tmp) {
 924                 return WERR_NOMEM;
 925         }
 926         if (!reg_split_key(key_tmp, &parentpath, &keyname)) {
 927                 return WERR_OBJECT_PATH_INVALID;
 928         }
 929
 930         if (!keyname) {
 931                 keyname = parentpath;
 932         }
 933
 934         /* we need a registry_key_handle object here to enumerate subkeys and values */
 935
 936         ZERO_STRUCT(registry_key);
 937
 938         registry_key.name = talloc_strdup(regfile->mem_ctx, keypath);
 939         if (registry_key.name == NULL) {
 940                 return WERR_NOMEM;
 941         }
 942
 943         registry_key.ops = reghook_cache_find(registry_key.name);
 944         if (registry_key.ops == NULL) {
 945                 return WERR_BADFILE;
 946         }
 947
 948         /* lookup the values and subkeys */
 949
 950         result = regsubkey_ctr_init(regfile->mem_ctx, &subkeys);
 951         W_ERROR_NOT_OK_RETURN(result);
 952
 953         result = regval_ctr_init(subkeys, &values);
 954         W_ERROR_NOT_OK_RETURN(result);
 955
 956         fetch_reg_keys(&registry_key, subkeys);
 957         fetch_reg_values(&registry_key, values);
 958
 959         result = regkey_get_secdesc(regfile->mem_ctx, &registry_key, &sec_desc);
 960         if (!W_ERROR_IS_OK(result)) {
 961                 goto done;
 962         }
 963
 964         /* write out this key */
 965
 966         key = regfio_write_key(regfile, keyname, values, subkeys, sec_desc,
 967                                parent);
 968         if (key == NULL) {
 969                 result = WERR_CAN_NOT_COMPLETE;
 970                 goto done;
 971         }
 972
 973         /* write each one of the subkeys out */
 974
 975         num_subkeys = regsubkey_ctr_numkeys(subkeys);
 976         for (i=0; i<num_subkeys; i++) {
 977                 subkeyname = regsubkey_ctr_specific_key(subkeys, i);
 978                 subkeypath = talloc_asprintf(regfile->mem_ctx, "%s\\%s",
 979                                              keypath, subkeyname);
 980                 if (subkeypath == NULL) {
 981                         result = WERR_NOMEM;
 982                         goto done;
 983                 }
 984                 result = reg_write_tree(regfile, subkeypath, key);
 985                 if (!W_ERROR_IS_OK(result))
 986                         goto done;
 987         }
 988
 989         DEBUG(6, ("reg_write_tree: wrote key [%s]\n", keypath));
 990
 991 done:
 992         TALLOC_FREE(subkeys);
 993         TALLOC_FREE(registry_key.name);
 994
 995         return result;
 996 }
 997
 998 static WERROR backup_registry_key(struct registry_key_handle *krecord,
 999                                   const char *fname)
1000 {
1001         REGF_FILE *regfile;
1002         WERROR result;
1003
1004         /* open the registry file....fail if the file already exists */
1005
1006         regfile = regfio_open(fname, (O_RDWR|O_CREAT|O_EXCL),
1007                               (S_IREAD|S_IWRITE));
1008         if (regfile == NULL) {
1009                 DEBUG(0,("backup_registry_key: failed to open \"%s\" (%s)\n",
1010                          fname, strerror(errno) ));
1011                 return ntstatus_to_werror(map_nt_error_from_unix(errno));
1012         }
1013
1014         /* write the registry tree to the file  */
1015
1016         result = reg_write_tree(regfile, krecord->name, NULL);
1017
1018         /* cleanup */
1019
1020         regfio_close(regfile);
1021
1022         return result;
1023 }
1024
1025 WERROR reg_savekey(struct registry_key *key, const char *fname)
1026 {
1027         return backup_registry_key(key->key, fname);
1028 }
1029
1030 /**********************************************************************
1031  * Higher level utility functions
1032  **********************************************************************/
1033
1034 WERROR reg_deleteallvalues(struct registry_key *key)
1035 {
1036         WERROR err;
1037         int i;
1038
1039         if (!(key->key->access_granted & KEY_SET_VALUE)) {
1040                 return WERR_ACCESS_DENIED;
1041         }
1042
1043         if (!W_ERROR_IS_OK(err = fill_value_cache(key))) {
1044                 return err;
1045         }
1046
1047         for (i=0; i < regval_ctr_numvals(key->values); i++) {
1048                 struct regval_blob *blob;
1049                 blob = regval_ctr_specific_value(key->values, i);
1050                 regval_ctr_delvalue(key->values, regval_name(blob));
1051         }
1052
1053         if (!store_reg_values(key->key, key->values)) {
1054                 TALLOC_FREE(key->values);
1055                 return WERR_REG_IO_FAILURE;
1056         }
1057
1058         return WERR_OK;
1059 }
1060
1061 /*
1062  * Utility function to open a complete registry path including the hive prefix.
1063  */
1064
1065 WERROR reg_open_path(TALLOC_CTX *mem_ctx, const char *orig_path,
1066                      uint32 desired_access, const struct nt_user_token *token,
1067                      struct registry_key **pkey)
1068 {
1069         struct registry_key *hive, *key;
1070         char *path, *p;
1071         WERROR err;
1072
1073         if (!(path = SMB_STRDUP(orig_path))) {
1074                 return WERR_NOMEM;
1075         }
1076
1077         p = strchr(path, '\\');
1078
1079         if ((p == NULL) || (p[1] == '\0')) {
1080                 /*
1081                  * No key behind the hive, just return the hive
1082                  */
1083
1084                 err = reg_openhive(mem_ctx, path, desired_access, token,
1085                                    &hive);
1086                 if (!W_ERROR_IS_OK(err)) {
1087                         SAFE_FREE(path);
1088                         return err;
1089                 }
1090                 SAFE_FREE(path);
1091                 *pkey = hive;
1092                 return WERR_OK;
1093         }
1094
1095         *p = '\0';
1096
1097         err = reg_openhive(mem_ctx, path, KEY_ENUMERATE_SUB_KEYS, token,
1098                            &hive);
1099         if (!W_ERROR_IS_OK(err)) {
1100                 SAFE_FREE(path);
1101                 return err;
1102         }
1103
1104         err = reg_openkey(mem_ctx, hive, p+1, desired_access, &key);
1105
1106         TALLOC_FREE(hive);
1107         SAFE_FREE(path);
1108
1109         if (!W_ERROR_IS_OK(err)) {
1110                 return err;
1111         }
1112
1113         *pkey = key;
1114         return WERR_OK;
1115 }
1116
1117 /*
1118  * Utility function to delete a registry key with all its subkeys.
1119  * Note that reg_deletekey returns ACCESS_DENIED when called on a
1120  * key that has subkeys.
1121  */
1122 static WERROR reg_deletekey_recursive_internal(TALLOC_CTX *ctx,
1123                                                struct registry_key *parent,
1124                                                const char *path,
1125                                                bool del_key)
1126 {
1127         TALLOC_CTX *mem_ctx = NULL;
1128         WERROR werr = WERR_OK;
1129         struct registry_key *key;
1130         char *subkey_name = NULL;
1131         uint32 i;
1132
1133         mem_ctx = talloc_new(ctx);
1134         if (mem_ctx == NULL) {
1135                 werr = WERR_NOMEM;
1136                 goto done;
1137         }
1138
1139         /* recurse through subkeys first */
1140         werr = reg_openkey(mem_ctx, parent, path, REG_KEY_ALL, &key);
1141         if (!W_ERROR_IS_OK(werr)) {
1142                 goto done;
1143         }
1144
1145         werr = fill_subkey_cache(key);
1146         W_ERROR_NOT_OK_GOTO_DONE(werr);
1147
1148         /*
1149          * loop from top to bottom for perfomance:
1150          * this way, we need to rehash the regsubkey containers less
1151          */
1152         for (i = regsubkey_ctr_numkeys(key->subkeys) ; i > 0; i--) {
1153                 subkey_name = regsubkey_ctr_specific_key(key->subkeys, i-1);
1154                 werr = reg_deletekey_recursive_internal(mem_ctx, key,
1155                                         subkey_name,
1156                                         true);
1157                 W_ERROR_NOT_OK_GOTO_DONE(werr);
1158         }
1159
1160         if (del_key) {
1161                 /* now delete the actual key */
1162                 werr = reg_deletekey(parent, path);
1163         }
1164
1165 done:
1166         TALLOC_FREE(mem_ctx);
1167         return werr;
1168 }
1169
1170 static WERROR reg_deletekey_recursive_trans(TALLOC_CTX *ctx,
1171                                             struct registry_key *parent,
1172                                             const char *path,
1173                                             bool del_key)
1174 {
1175         WERROR werr;
1176
1177         werr = regdb_transaction_start();
1178         if (!W_ERROR_IS_OK(werr)) {
1179                 DEBUG(0, ("reg_deletekey_recursive_trans: "
1180                           "error starting transaction: %s\n",
1181                           win_errstr(werr)));
1182                 return werr;
1183         }
1184
1185         werr = reg_deletekey_recursive_internal(ctx, parent, path, del_key);
1186
1187         if (!W_ERROR_IS_OK(werr)) {
1188                 DEBUG(1, (__location__ " failed to delete key '%s' from key "
1189                           "'%s': %s\n", path, parent->key->name,
1190                           win_errstr(werr)));
1191                 werr = regdb_transaction_cancel();
1192                 if (!W_ERROR_IS_OK(werr)) {
1193                         DEBUG(0, ("reg_deletekey_recursive_trans: "
1194                                   "error cancelling transaction: %s\n",
1195                                   win_errstr(werr)));
1196                 }
1197         } else {
1198                 werr = regdb_transaction_commit();
1199                 if (!W_ERROR_IS_OK(werr)) {
1200                         DEBUG(0, ("reg_deletekey_recursive_trans: "
1201                                   "error committing transaction: %s\n",
1202                                   win_errstr(werr)));
1203                 }
1204         }
1205
1206         return werr;
1207 }
1208
1209 WERROR reg_deletekey_recursive(TALLOC_CTX *ctx,
1210                                struct registry_key *parent,
1211                                const char *path)
1212 {
1213         return reg_deletekey_recursive_trans(ctx, parent, path, true);
1214 }
1215
1216 WERROR reg_deletesubkeys_recursive(TALLOC_CTX *ctx,
1217                                    struct registry_key *parent,
1218                                    const char *path)
1219 {
1220         return reg_deletekey_recursive_trans(ctx, parent, path, false);
1221 }
1222
1223 #if 0
1224 /* these two functions are unused. */
1225
1226 /**
1227  * Utility function to create a registry key without opening the hive
1228  * before. Assumes the hive already exists.
1229  */
1230
1231 WERROR reg_create_path(TALLOC_CTX *mem_ctx, const char *orig_path,
1232                        uint32 desired_access,
1233                        const struct nt_user_token *token,
1234                        enum winreg_CreateAction *paction,
1235                        struct registry_key **pkey)
1236 {
1237         struct registry_key *hive;
1238         char *path, *p;
1239         WERROR err;
1240
1241         if (!(path = SMB_STRDUP(orig_path))) {
1242                 return WERR_NOMEM;
1243         }
1244
1245         p = strchr(path, '\\');
1246
1247         if ((p == NULL) || (p[1] == '\0')) {
1248                 /*
1249                  * No key behind the hive, just return the hive
1250                  */
1251
1252                 err = reg_openhive(mem_ctx, path, desired_access, token,
1253                                    &hive);
1254                 if (!W_ERROR_IS_OK(err)) {
1255                         SAFE_FREE(path);
1256                         return err;
1257                 }
1258                 SAFE_FREE(path);
1259                 *pkey = hive;
1260                 *paction = REG_OPENED_EXISTING_KEY;
1261                 return WERR_OK;
1262         }
1263
1264         *p = '\0';
1265
1266         err = reg_openhive(mem_ctx, path,
1267                            (strchr(p+1, '\\') != NULL) ?
1268                            KEY_ENUMERATE_SUB_KEYS : KEY_CREATE_SUB_KEY,
1269                            token, &hive);
1270         if (!W_ERROR_IS_OK(err)) {
1271                 SAFE_FREE(path);
1272                 return err;
1273         }
1274
1275         err = reg_createkey(mem_ctx, hive, p+1, desired_access, pkey, paction);
1276         SAFE_FREE(path);
1277         TALLOC_FREE(hive);
1278         return err;
1279 }
1280
1281 /*
1282  * Utility function to create a registry key without opening the hive
1283  * before. Will not delete a hive.
1284  */
1285
1286 WERROR reg_delete_path(const struct nt_user_token *token,
1287                        const char *orig_path)
1288 {
1289         struct registry_key *hive;
1290         char *path, *p;
1291         WERROR err;
1292
1293         if (!(path = SMB_STRDUP(orig_path))) {
1294                 return WERR_NOMEM;
1295         }
1296
1297         p = strchr(path, '\\');
1298
1299         if ((p == NULL) || (p[1] == '\0')) {
1300                 SAFE_FREE(path);
1301                 return WERR_INVALID_PARAM;
1302         }
1303
1304         *p = '\0';
1305
1306         err = reg_openhive(NULL, path,
1307                            (strchr(p+1, '\\') != NULL) ?
1308                            KEY_ENUMERATE_SUB_KEYS : KEY_CREATE_SUB_KEY,
1309                            token, &hive);
1310         if (!W_ERROR_IS_OK(err)) {
1311                 SAFE_FREE(path);
1312                 return err;
1313         }
1314
1315         err = reg_deletekey(hive, p+1);
1316         SAFE_FREE(path);
1317         TALLOC_FREE(hive);
1318         return err;
1319 }
1320 #endif /* #if 0 */