source/registry/reg_backend_db.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  Virtual Windows Registry Layer
   4  *  Copyright (C) Gerald Carter                     2002-2005
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /* Implementation of internal registry database functions. */
  21
  22 #include "includes.h"
  23
  24 #undef DBGC_CLASS
  25 #define DBGC_CLASS DBGC_REGISTRY
  26
  27 static struct db_context *regdb = NULL;
  28 static int regdb_refcount;
  29
  30 /* List the deepest path into the registry.  All part components will be created.*/
  31
  32 /* If you want to have a part of the path controlled by the tdb and part by
  33    a virtual registry db (e.g. printing), then you have to list the deepest path.
  34    For example,"HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion/Print"
  35    allows the reg_db backend to handle everything up to
  36    "HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion" and then we'll hook
  37    the reg_printing backend onto the last component of the path (see
  38    KEY_PRINTING_2K in include/rpc_reg.h)   --jerry */
  39
  40 static const char *builtin_registry_paths[] = {
  41         KEY_PRINTING_2K,
  42         KEY_PRINTING_PORTS,
  43         KEY_PRINTING,
  44         KEY_SHARES,
  45         KEY_EVENTLOG,
  46         KEY_SMBCONF,
  47         KEY_PERFLIB,
  48         KEY_PERFLIB_009,
  49         KEY_GROUP_POLICY,
  50         KEY_SAMBA_GROUP_POLICY,
  51         KEY_GP_MACHINE_POLICY,
  52         KEY_GP_MACHINE_WIN_POLICY,
  53         KEY_HKCU,
  54         KEY_GP_USER_POLICY,
  55         KEY_GP_USER_WIN_POLICY,
  56         KEY_WINLOGON_GPEXT_PATH,
  57         "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Print\\Monitors",
  58         KEY_PROD_OPTIONS,
  59         "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Terminal Server\\DefaultUserConfiguration",
  60         KEY_TCPIP_PARAMS,
  61         KEY_NETLOGON_PARAMS,
  62         KEY_HKU,
  63         KEY_HKCR,
  64         KEY_HKPD,
  65         KEY_HKPT,
  66          NULL };
  67
  68 struct builtin_regkey_value {
  69         const char *path;
  70         const char *valuename;
  71         uint32 type;
  72         union {
  73                 const char *string;
  74                 uint32 dw_value;
  75         } data;
  76 };
  77
  78 static struct builtin_regkey_value builtin_registry_values[] = {
  79         { KEY_PRINTING_PORTS,
  80                 SAMBA_PRINTER_PORT_NAME, REG_SZ, { "" } },
  81         { KEY_PRINTING_2K,
  82                 "DefaultSpoolDirectory", REG_SZ, { "C:\\Windows\\System32\\Spool\\Printers" } },
  83         { KEY_EVENTLOG,
  84                 "DisplayName", REG_SZ, { "Event Log" } },
  85         { KEY_EVENTLOG,
  86                 "ErrorControl", REG_DWORD, { (char*)0x00000001 } },
  87         { NULL, NULL, 0, { NULL } }
  88 };
  89
  90 /**
  91  * Initialize a key in the registry:
  92  * create each component key of the specified path.
  93  */
  94 static WERROR init_registry_key_internal(const char *add_path)
  95 {
  96         WERROR werr;
  97         TALLOC_CTX *frame = talloc_stackframe();
  98         char *path = NULL;
  99         char *base = NULL;
 100         char *remaining = NULL;
 101         char *keyname;
 102         char *subkeyname;
 103         REGSUBKEY_CTR *subkeys;
 104         const char *p, *p2;
 105
 106         DEBUG(6, ("init_registry_key: Adding [%s]\n", add_path));
 107
 108         path = talloc_strdup(frame, add_path);
 109         base = talloc_strdup(frame, "");
 110         if (!path || !base) {
 111                 werr = WERR_NOMEM;
 112                 goto fail;
 113         }
 114         p = path;
 115
 116         while (next_token_talloc(frame, &p, &keyname, "\\")) {
 117
 118                 /* build up the registry path from the components */
 119
 120                 if (*base) {
 121                         base = talloc_asprintf(frame, "%s\\", base);
 122                         if (!base) {
 123                                 werr = WERR_NOMEM;
 124                                 goto fail;
 125                         }
 126                 }
 127                 base = talloc_asprintf_append(base, "%s", keyname);
 128                 if (!base) {
 129                         werr = WERR_NOMEM;
 130                         goto fail;
 131                 }
 132
 133                 /* get the immediate subkeyname (if we have one ) */
 134
 135                 subkeyname = talloc_strdup(frame, "");
 136                 if (!subkeyname) {
 137                         werr = WERR_NOMEM;
 138                         goto fail;
 139                 }
 140                 if (*p) {
 141                         remaining = talloc_strdup(frame, p);
 142                         if (!remaining) {
 143                                 werr = WERR_NOMEM;
 144                                 goto fail;
 145                         }
 146                         p2 = remaining;
 147
 148                         if (!next_token_talloc(frame, &p2,
 149                                                 &subkeyname, "\\"))
 150                         {
 151                                 subkeyname = talloc_strdup(frame,p2);
 152                                 if (!subkeyname) {
 153                                         werr = WERR_NOMEM;
 154                                         goto fail;
 155                                 }
 156                         }
 157                 }
 158
 159                 DEBUG(10,("init_registry_key: Storing key [%s] with "
 160                           "subkey [%s]\n", base,
 161                           *subkeyname ? subkeyname : "NULL"));
 162
 163                 /* we don't really care if the lookup succeeds or not
 164                  * since we are about to update the record.
 165                  * We just want any subkeys already present */
 166
 167                 if (!(subkeys = TALLOC_ZERO_P(frame, REGSUBKEY_CTR))) {
 168                         DEBUG(0,("talloc() failure!\n"));
 169                         werr = WERR_NOMEM;
 170                         goto fail;
 171                 }
 172
 173                 regdb_fetch_keys(base, subkeys);
 174                 if (*subkeyname) {
 175                         werr = regsubkey_ctr_addkey(subkeys, subkeyname);
 176                         if (!W_ERROR_IS_OK(werr)) {
 177                                 goto fail;
 178                         }
 179                 }
 180                 if (!regdb_store_keys( base, subkeys)) {
 181                         werr = WERR_CAN_NOT_COMPLETE;
 182                         goto fail;
 183                 }
 184         }
 185
 186         werr = WERR_OK;
 187
 188 fail:
 189         TALLOC_FREE(frame);
 190         return werr;
 191 }
 192
 193 /**
 194  * Initialize a key in the registry:
 195  * create each component key of the specified path,
 196  * wrapped in one db transaction.
 197  */
 198 WERROR init_registry_key(const char *add_path)
 199 {
 200         WERROR werr;
 201
 202         if (regdb->transaction_start(regdb) != 0) {
 203                 DEBUG(0, ("init_registry_key: transaction_start failed\n"));
 204                 return WERR_REG_IO_FAILURE;
 205         }
 206
 207         werr = init_registry_key_internal(add_path);
 208         if (!W_ERROR_IS_OK(werr)) {
 209                 goto fail;
 210         }
 211
 212         if (regdb->transaction_commit(regdb) != 0) {
 213                 DEBUG(0, ("init_registry_key: Could not commit transaction\n"));
 214                 return WERR_REG_IO_FAILURE;
 215         }
 216
 217         return WERR_OK;
 218
 219 fail:
 220         if (regdb->transaction_cancel(regdb) != 0) {
 221                 smb_panic("init_registry_key: transaction_cancel failed\n");
 222         }
 223
 224         return werr;
 225 }
 226
 227 /***********************************************************************
 228  Open the registry data in the tdb
 229  ***********************************************************************/
 230
 231 WERROR init_registry_data(void)
 232 {
 233         WERROR werr;
 234         TALLOC_CTX *frame = NULL;
 235         REGVAL_CTR *values;
 236         int i;
 237         UNISTR2 data;
 238
 239         /*
 240          * There are potentially quite a few store operations which are all
 241          * indiviually wrapped in tdb transactions. Wrapping them in a single
 242          * transaction gives just a single transaction_commit() to actually do
 243          * its fsync()s. See tdb/common/transaction.c for info about nested
 244          * transaction behaviour.
 245          */
 246
 247         if (regdb->transaction_start(regdb) != 0) {
 248                 DEBUG(0, ("init_registry_data: tdb_transaction_start "
 249                           "failed\n"));
 250                 return WERR_REG_IO_FAILURE;
 251         }
 252
 253         /* loop over all of the predefined paths and add each component */
 254
 255         for (i=0; builtin_registry_paths[i] != NULL; i++) {
 256                 werr = init_registry_key_internal(builtin_registry_paths[i]);
 257                 if (!W_ERROR_IS_OK(werr)) {
 258                         goto fail;
 259                 }
 260         }
 261
 262         /* loop over all of the predefined values and add each component */
 263
 264         frame = talloc_stackframe();
 265
 266         for (i=0; builtin_registry_values[i].path != NULL; i++) {
 267
 268                 values = TALLOC_ZERO_P(frame, REGVAL_CTR);
 269                 if (values == NULL) {
 270                         werr = WERR_NOMEM;
 271                         goto fail;
 272                 }
 273
 274                 regdb_fetch_values(builtin_registry_values[i].path, values);
 275
 276                 /* preserve existing values across restarts. Only add new ones */
 277
 278                 if (!regval_ctr_key_exists(values,
 279                                         builtin_registry_values[i].valuename))
 280                 {
 281                         switch(builtin_registry_values[i].type) {
 282                         case REG_DWORD:
 283                                 regval_ctr_addvalue(values,
 284                                         builtin_registry_values[i].valuename,
 285                                         REG_DWORD,
 286                                         (char*)&builtin_registry_values[i].data.dw_value,
 287                                         sizeof(uint32));
 288                                 break;
 289
 290                         case REG_SZ:
 291                                 init_unistr2(&data,
 292                                         builtin_registry_values[i].data.string,
 293                                         UNI_STR_TERMINATE);
 294                                 regval_ctr_addvalue(values,
 295                                         builtin_registry_values[i].valuename,
 296                                         REG_SZ,
 297                                         (char*)data.buffer,
 298                                         data.uni_str_len*sizeof(uint16));
 299                                 break;
 300
 301                         default:
 302                                 DEBUG(0, ("init_registry_data: invalid value "
 303                                           "type in builtin_registry_values "
 304                                           "[%d]\n",
 305                                           builtin_registry_values[i].type));
 306                         }
 307                         regdb_store_values(builtin_registry_values[i].path,
 308                                            values);
 309                 }
 310                 TALLOC_FREE(values);
 311         }
 312
 313         TALLOC_FREE(frame);
 314
 315         if (regdb->transaction_commit(regdb) != 0) {
 316                 DEBUG(0, ("init_registry_data: Could not commit "
 317                           "transaction\n"));
 318                 return WERR_REG_IO_FAILURE;
 319         }
 320
 321         return WERR_OK;
 322
 323  fail:
 324
 325         TALLOC_FREE(frame);
 326
 327         if (regdb->transaction_cancel(regdb) != 0) {
 328                 smb_panic("init_registry_data: tdb_transaction_cancel "
 329                           "failed\n");
 330         }
 331
 332         return werr;
 333 }
 334
 335 /***********************************************************************
 336  Open the registry database
 337  ***********************************************************************/
 338
 339 WERROR regdb_init(void)
 340 {
 341         const char *vstring = "INFO/version";
 342         uint32 vers_id;
 343         WERROR werr;
 344
 345         if (regdb) {
 346                 DEBUG(10, ("regdb_init: incrementing refcount (%d)\n",
 347                           regdb_refcount));
 348                 regdb_refcount++;
 349                 return WERR_OK;
 350         }
 351
 352         regdb = db_open_trans(NULL, state_path("registry.tdb"), 0,
 353                               REG_TDB_FLAGS, O_RDWR, 0600);
 354         if (!regdb) {
 355                 regdb = db_open_trans(NULL, state_path("registry.tdb"), 0,
 356                                       REG_TDB_FLAGS, O_RDWR|O_CREAT, 0600);
 357                 if (!regdb) {
 358                         werr = ntstatus_to_werror(map_nt_error_from_unix(errno));
 359                         DEBUG(0,("regdb_init: Failed to open registry %s (%s)\n",
 360                                 state_path("registry.tdb"), strerror(errno) ));
 361                         return werr;
 362                 }
 363
 364                 DEBUG(10,("regdb_init: Successfully created registry tdb\n"));
 365         }
 366
 367         regdb_refcount = 1;
 368
 369         vers_id = dbwrap_fetch_int32(regdb, vstring);
 370
 371         if ( vers_id != REGVER_V1 ) {
 372                 NTSTATUS status;
 373                 /* any upgrade code here if needed */
 374                 DEBUG(10, ("regdb_init: got %s = %d != %d\n", vstring,
 375                            vers_id, REGVER_V1));
 376                 status = dbwrap_trans_store_int32(regdb, vstring, REGVER_V1);
 377                 if (!NT_STATUS_IS_OK(status)) {
 378                         DEBUG(0, ("regdb_init: error storing %s = %d: %s\n",
 379                                   vstring, REGVER_V1, nt_errstr(status)));
 380                         return ntstatus_to_werror(status);
 381                 } else {
 382                         DEBUG(10, ("regdb_init: stored %s = %d\n",
 383                                   vstring, REGVER_V1));
 384                 }
 385         }
 386
 387         return WERR_OK;
 388 }
 389
 390 /***********************************************************************
 391  Open the registry.  Must already have been initialized by regdb_init()
 392  ***********************************************************************/
 393
 394 WERROR regdb_open( void )
 395 {
 396         WERROR result = WERR_OK;
 397
 398         if ( regdb ) {
 399                 DEBUG(10,("regdb_open: incrementing refcount (%d)\n", regdb_refcount));
 400                 regdb_refcount++;
 401                 return WERR_OK;
 402         }
 403
 404         become_root();
 405
 406         regdb = db_open_trans(NULL, state_path("registry.tdb"), 0,
 407                               REG_TDB_FLAGS, O_RDWR, 0600);
 408         if ( !regdb ) {
 409                 result = ntstatus_to_werror( map_nt_error_from_unix( errno ) );
 410                 DEBUG(0,("regdb_open: Failed to open %s! (%s)\n",
 411                         state_path("registry.tdb"), strerror(errno) ));
 412         }
 413
 414         unbecome_root();
 415
 416         regdb_refcount = 1;
 417         DEBUG(10,("regdb_open: refcount reset (%d)\n", regdb_refcount));
 418
 419         return result;
 420 }
 421
 422 /***********************************************************************
 423  ***********************************************************************/
 424
 425 int regdb_close( void )
 426 {
 427         if (regdb_refcount == 0) {
 428                 return 0;
 429         }
 430
 431         regdb_refcount--;
 432
 433         DEBUG(10,("regdb_close: decrementing refcount (%d)\n", regdb_refcount));
 434
 435         if ( regdb_refcount > 0 )
 436                 return 0;
 437
 438         SMB_ASSERT( regdb_refcount >= 0 );
 439
 440         TALLOC_FREE(regdb);
 441         return 0;
 442 }
 443
 444 /***********************************************************************
 445  return the tdb sequence number of the registry tdb.
 446  this is an indicator for the content of the registry
 447  having changed. it will change upon regdb_init, too, though.
 448  ***********************************************************************/
 449 int regdb_get_seqnum(void)
 450 {
 451         return regdb->get_seqnum(regdb);
 452 }
 453
 454 /***********************************************************************
 455  Add subkey strings to the registry tdb under a defined key
 456  fmt is the same format as tdb_pack except this function only supports
 457  fstrings
 458  ***********************************************************************/
 459
 460 static bool regdb_store_keys_internal(const char *key, REGSUBKEY_CTR *ctr)
 461 {
 462         TDB_DATA dbuf;
 463         uint8 *buffer = NULL;
 464         int i = 0;
 465         uint32 len, buflen;
 466         bool ret = true;
 467         uint32 num_subkeys = regsubkey_ctr_numkeys(ctr);
 468         char *keyname = NULL;
 469         TALLOC_CTX *ctx = talloc_stackframe();
 470         NTSTATUS status;
 471
 472         if (!key) {
 473                 return false;
 474         }
 475
 476         keyname = talloc_strdup(ctx, key);
 477         if (!keyname) {
 478                 return false;
 479         }
 480         keyname = normalize_reg_path(ctx, keyname);
 481
 482         /* allocate some initial memory */
 483
 484         buffer = (uint8 *)SMB_MALLOC(1024);
 485         if (buffer == NULL) {
 486                 return false;
 487         }
 488         buflen = 1024;
 489         len = 0;
 490
 491         /* store the number of subkeys */
 492
 493         len += tdb_pack(buffer+len, buflen-len, "d", num_subkeys);
 494
 495         /* pack all the strings */
 496
 497         for (i=0; i<num_subkeys; i++) {
 498                 len += tdb_pack(buffer+len, buflen-len, "f",
 499                                 regsubkey_ctr_specific_key(ctr, i));
 500                 if (len > buflen) {
 501                         /* allocate some extra space */
 502                         buffer = (uint8 *)SMB_REALLOC(buffer, len*2);
 503                         if(buffer == NULL) {
 504                                 DEBUG(0, ("regdb_store_keys: Failed to realloc "
 505                                           "memory of size [%d]\n", len*2));
 506                                 ret = false;
 507                                 goto done;
 508                         }
 509                         buflen = len*2;
 510                         len = tdb_pack(buffer+len, buflen-len, "f",
 511                                        regsubkey_ctr_specific_key(ctr, i));
 512                 }
 513         }
 514
 515         /* finally write out the data */
 516
 517         dbuf.dptr = buffer;
 518         dbuf.dsize = len;
 519         status = dbwrap_store_bystring(regdb, keyname, dbuf, TDB_REPLACE);
 520         if (!NT_STATUS_IS_OK(status)) {
 521                 ret = false;
 522                 goto done;
 523         }
 524
 525 done:
 526         TALLOC_FREE(ctx);
 527         SAFE_FREE(buffer);
 528         return ret;
 529 }
 530
 531 /***********************************************************************
 532  Store the new subkey record and create any child key records that
 533  do not currently exist
 534  ***********************************************************************/
 535
 536 bool regdb_store_keys(const char *key, REGSUBKEY_CTR *ctr)
 537 {
 538         int num_subkeys, i;
 539         char *path = NULL;
 540         REGSUBKEY_CTR *subkeys = NULL, *old_subkeys = NULL;
 541         char *oldkeyname = NULL;
 542         TALLOC_CTX *ctx = talloc_stackframe();
 543         NTSTATUS status;
 544
 545         /*
 546          * fetch a list of the old subkeys so we can determine if anything has
 547          * changed
 548          */
 549
 550         if (!(old_subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR))) {
 551                 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 552                 return false;
 553         }
 554
 555         regdb_fetch_keys(key, old_subkeys);
 556
 557         if ((ctr->num_subkeys && old_subkeys->num_subkeys) &&
 558             (ctr->num_subkeys == old_subkeys->num_subkeys)) {
 559
 560                 for (i = 0; i<ctr->num_subkeys; i++) {
 561                         if (strcmp(ctr->subkeys[i],
 562                                    old_subkeys->subkeys[i]) != 0) {
 563                                 break;
 564                         }
 565                 }
 566                 if (i == ctr->num_subkeys) {
 567                         /*
 568                          * Nothing changed, no point to even start a tdb
 569                          * transaction
 570                          */
 571                         TALLOC_FREE(old_subkeys);
 572                         return true;
 573                 }
 574         }
 575
 576         TALLOC_FREE(old_subkeys);
 577
 578         if (regdb->transaction_start(regdb) != 0) {
 579                 DEBUG(0, ("regdb_store_keys: transaction_start failed\n"));
 580                 goto fail;
 581         }
 582
 583         /*
 584          * Re-fetch the old keys inside the transaction
 585          */
 586
 587         if (!(old_subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR))) {
 588                 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 589                 goto cancel;
 590         }
 591
 592         regdb_fetch_keys(key, old_subkeys);
 593
 594         /* store the subkey list for the parent */
 595
 596         if (!regdb_store_keys_internal(key, ctr) ) {
 597                 DEBUG(0,("regdb_store_keys: Failed to store new subkey list "
 598                          "for parent [%s]\n", key));
 599                 goto cancel;
 600         }
 601
 602         /* now delete removed keys */
 603
 604         num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
 605         for (i=0; i<num_subkeys; i++) {
 606                 oldkeyname = regsubkey_ctr_specific_key(old_subkeys, i);
 607
 608                 if (regsubkey_ctr_key_exists(ctr, oldkeyname)) {
 609                         /*
 610                          * It's still around, don't delete
 611                          */
 612
 613                         continue;
 614                 }
 615
 616                 path = talloc_asprintf(ctx, "%s/%s", key, oldkeyname);
 617                 if (!path) {
 618                         goto cancel;
 619                 }
 620                 path = normalize_reg_path(ctx, path);
 621                 if (!path) {
 622                         goto cancel;
 623                 }
 624                 status = dbwrap_delete_bystring(regdb, path);
 625                 if (!NT_STATUS_IS_OK(status)) {
 626                         DEBUG(1, ("Deleting %s failed\n", path));
 627                         goto cancel;
 628                 }
 629
 630                 TALLOC_FREE(path);
 631                 path = talloc_asprintf(ctx, "%s/%s/%s",
 632                                 REG_VALUE_PREFIX,
 633                                 key,
 634                                 oldkeyname );
 635                 if (!path) {
 636                         goto cancel;
 637                 }
 638                 path = normalize_reg_path(ctx, path);
 639                 if (!path) {
 640                         goto cancel;
 641                 }
 642
 643                 /*
 644                  * Ignore errors here, we might have no values around
 645                  */
 646                 dbwrap_delete_bystring(regdb, path);
 647                 TALLOC_FREE(path);
 648         }
 649
 650         TALLOC_FREE(old_subkeys);
 651
 652         /* now create records for any subkeys that don't already exist */
 653
 654         num_subkeys = regsubkey_ctr_numkeys(ctr);
 655
 656         if (num_subkeys == 0) {
 657                 if (!(subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR)) ) {
 658                         DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 659                         goto cancel;
 660                 }
 661
 662                 if (!regdb_store_keys_internal(key, subkeys)) {
 663                         DEBUG(0,("regdb_store_keys: Failed to store "
 664                                  "new record for key [%s]\n", key));
 665                         goto cancel;
 666                 }
 667                 TALLOC_FREE(subkeys);
 668
 669         }
 670
 671         for (i=0; i<num_subkeys; i++) {
 672                 path = talloc_asprintf(ctx, "%s/%s",
 673                                         key,
 674                                         regsubkey_ctr_specific_key(ctr, i));
 675                 if (!path) {
 676                         goto cancel;
 677                 }
 678                 if (!(subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR)) ) {
 679                         DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 680                         goto cancel;
 681                 }
 682
 683                 if (regdb_fetch_keys( path, subkeys ) == -1) {
 684                         /* create a record with 0 subkeys */
 685                         if (!regdb_store_keys_internal(path, subkeys)) {
 686                                 DEBUG(0,("regdb_store_keys: Failed to store "
 687                                          "new record for key [%s]\n", path));
 688                                 goto cancel;
 689                         }
 690                 }
 691
 692                 TALLOC_FREE(subkeys);
 693                 TALLOC_FREE(path);
 694         }
 695
 696         if (regdb->transaction_commit(regdb) != 0) {
 697                 DEBUG(0, ("regdb_store_keys: Could not commit transaction\n"));
 698                 goto fail;
 699         }
 700
 701         TALLOC_FREE(ctx);
 702         return true;
 703
 704 cancel:
 705         if (regdb->transaction_cancel(regdb) != 0) {
 706                 smb_panic("regdb_store_keys: transaction_cancel failed\n");
 707         }
 708
 709 fail:
 710         TALLOC_FREE(ctx);
 711
 712         return false;
 713 }
 714
 715
 716 /***********************************************************************
 717  Retrieve an array of strings containing subkeys.  Memory should be
 718  released by the caller.
 719  ***********************************************************************/
 720
 721 int regdb_fetch_keys(const char *key, REGSUBKEY_CTR *ctr)
 722 {
 723         WERROR werr;
 724         char *path = NULL;
 725         uint32 num_items;
 726         uint8 *buf;
 727         uint32 buflen, len;
 728         int i;
 729         fstring subkeyname;
 730         int ret = -1;
 731         int dbret = -1;
 732         TALLOC_CTX *frame = talloc_stackframe();
 733         TDB_DATA value;
 734
 735         DEBUG(11,("regdb_fetch_keys: Enter key => [%s]\n", key ? key : "NULL"));
 736
 737         path = talloc_strdup(frame, key);
 738         if (!path) {
 739                 goto fail;
 740         }
 741
 742         /* convert to key format */
 743         path = talloc_string_sub(frame, path, "\\", "/");
 744         if (!path) {
 745                 goto fail;
 746         }
 747         strupper_m(path);
 748
 749         ctr->seqnum = regdb_get_seqnum();
 750
 751         dbret = regdb->fetch(regdb, frame, string_term_tdb_data(path), &value);
 752         if (dbret != 0) {
 753                 goto fail;
 754         }
 755
 756         buf = value.dptr;
 757         buflen = value.dsize;
 758
 759         if ( !buf ) {
 760                 DEBUG(5,("regdb_fetch_keys: tdb lookup failed to locate key [%s]\n", key));
 761                 goto fail;
 762         }
 763
 764         len = tdb_unpack( buf, buflen, "d", &num_items);
 765
 766         for (i=0; i<num_items; i++) {
 767                 len += tdb_unpack(buf+len, buflen-len, "f", subkeyname);
 768                 werr = regsubkey_ctr_addkey(ctr, subkeyname);
 769                 if (!W_ERROR_IS_OK(werr)) {
 770                         DEBUG(5, ("regdb_fetch_keys: regsubkey_ctr_addkey "
 771                                   "failed: %s\n", dos_errstr(werr)));
 772                         goto fail;
 773                 }
 774         }
 775
 776         DEBUG(11,("regdb_fetch_keys: Exit [%d] items\n", num_items));
 777
 778         ret = num_items;
 779  fail:
 780         TALLOC_FREE(frame);
 781         return ret;
 782 }
 783
 784 /****************************************************************************
 785  Unpack a list of registry values frem the TDB
 786  ***************************************************************************/
 787
 788 static int regdb_unpack_values(REGVAL_CTR *values, uint8 *buf, int buflen)
 789 {
 790         int             len = 0;
 791         uint32          type;
 792         fstring valuename;
 793         uint32          size;
 794         uint8           *data_p;
 795         uint32          num_values = 0;
 796         int             i;
 797
 798         /* loop and unpack the rest of the registry values */
 799
 800         len += tdb_unpack(buf+len, buflen-len, "d", &num_values);
 801
 802         for ( i=0; i<num_values; i++ ) {
 803                 /* unpack the next regval */
 804
 805                 type = REG_NONE;
 806                 size = 0;
 807                 data_p = NULL;
 808                 valuename[0] = '\0';
 809                 len += tdb_unpack(buf+len, buflen-len, "fdB",
 810                                   valuename,
 811                                   &type,
 812                                   &size,
 813                                   &data_p);
 814
 815                 /* add the new value. Paranoid protective code -- make sure data_p is valid */
 816
 817                 if (*valuename && size && data_p) {
 818                         regval_ctr_addvalue(values, valuename, type,
 819                                         (const char *)data_p, size);
 820                 }
 821                 SAFE_FREE(data_p); /* 'B' option to tdb_unpack does a malloc() */
 822
 823                 DEBUG(8,("specific: [%s], len: %d\n", valuename, size));
 824         }
 825
 826         return len;
 827 }
 828
 829 /****************************************************************************
 830  Pack all values in all printer keys
 831  ***************************************************************************/
 832
 833 static int regdb_pack_values(REGVAL_CTR *values, uint8 *buf, int buflen)
 834 {
 835         int             len = 0;
 836         int             i;
 837         REGISTRY_VALUE  *val;
 838         int             num_values;
 839
 840         if ( !values )
 841                 return 0;
 842
 843         num_values = regval_ctr_numvals( values );
 844
 845         /* pack the number of values first */
 846
 847         len += tdb_pack( buf+len, buflen-len, "d", num_values );
 848
 849         /* loop over all values */
 850
 851         for ( i=0; i<num_values; i++ ) {
 852                 val = regval_ctr_specific_value( values, i );
 853                 len += tdb_pack(buf+len, buflen-len, "fdB",
 854                                 regval_name(val),
 855                                 regval_type(val),
 856                                 regval_size(val),
 857                                 regval_data_p(val) );
 858         }
 859
 860         return len;
 861 }
 862
 863 /***********************************************************************
 864  Retrieve an array of strings containing subkeys.  Memory should be
 865  released by the caller.
 866  ***********************************************************************/
 867
 868 int regdb_fetch_values( const char* key, REGVAL_CTR *values )
 869 {
 870         char *keystr = NULL;
 871         TALLOC_CTX *ctx = talloc_stackframe();
 872         int ret = 0;
 873         int dbret = -1;
 874         TDB_DATA value;
 875
 876         DEBUG(10,("regdb_fetch_values: Looking for value of key [%s] \n", key));
 877
 878         keystr = talloc_asprintf(ctx, "%s/%s", REG_VALUE_PREFIX, key);
 879         if (!keystr) {
 880                 return 0;
 881         }
 882         keystr = normalize_reg_path(ctx, keystr);
 883         if (!keystr) {
 884                 goto done;
 885         }
 886
 887         values->seqnum = regdb_get_seqnum();
 888
 889         dbret = regdb->fetch(regdb, ctx, string_term_tdb_data(keystr), &value);
 890         if (dbret != 0) {
 891                 goto done;
 892         }
 893
 894         if (!value.dptr) {
 895                 /* all keys have zero values by default */
 896                 goto done;
 897         }
 898
 899         regdb_unpack_values(values, value.dptr, value.dsize);
 900         ret = regval_ctr_numvals(values);
 901
 902 done:
 903         TALLOC_FREE(ctx);
 904         return ret;
 905 }
 906
 907 bool regdb_store_values( const char *key, REGVAL_CTR *values )
 908 {
 909         TDB_DATA old_data, data;
 910         char *keystr = NULL;
 911         TALLOC_CTX *ctx = talloc_stackframe();
 912         int len;
 913         NTSTATUS status;
 914         bool result = false;
 915
 916         DEBUG(10,("regdb_store_values: Looking for value of key [%s] \n", key));
 917
 918         ZERO_STRUCT(data);
 919
 920         len = regdb_pack_values(values, data.dptr, data.dsize);
 921         if (len <= 0) {
 922                 DEBUG(0,("regdb_store_values: unable to pack values. len <= 0\n"));
 923                 goto done;
 924         }
 925
 926         data.dptr = TALLOC_ARRAY(ctx, uint8, len);
 927         data.dsize = len;
 928
 929         len = regdb_pack_values(values, data.dptr, data.dsize);
 930
 931         SMB_ASSERT( len == data.dsize );
 932
 933         keystr = talloc_asprintf(ctx, "%s/%s", REG_VALUE_PREFIX, key );
 934         if (!keystr) {
 935                 goto done;
 936         }
 937         keystr = normalize_reg_path(ctx, keystr);
 938         if (!keystr) {
 939                 goto done;
 940         }
 941
 942         old_data = dbwrap_fetch_bystring(regdb, ctx, keystr);
 943
 944         if ((old_data.dptr != NULL)
 945             && (old_data.dsize == data.dsize)
 946             && (memcmp(old_data.dptr, data.dptr, data.dsize) == 0))
 947         {
 948                 result = true;
 949                 goto done;
 950         }
 951
 952         status = dbwrap_trans_store(regdb, string_term_tdb_data(keystr), data,
 953                                     TDB_REPLACE);
 954
 955         result = NT_STATUS_IS_OK(status);
 956
 957 done:
 958         TALLOC_FREE(ctx);
 959         return result;
 960 }
 961
 962 static WERROR regdb_get_secdesc(TALLOC_CTX *mem_ctx, const char *key,
 963                                 struct security_descriptor **psecdesc)
 964 {
 965         char *tdbkey;
 966         TDB_DATA data;
 967         NTSTATUS status;
 968         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 969         WERROR err = WERR_OK;
 970
 971         DEBUG(10, ("regdb_get_secdesc: Getting secdesc of key [%s]\n", key));
 972
 973         tdbkey = talloc_asprintf(tmp_ctx, "%s/%s", REG_SECDESC_PREFIX, key);
 974         if (tdbkey == NULL) {
 975                 err = WERR_NOMEM;
 976                 goto done;
 977         }
 978         normalize_dbkey(tdbkey);
 979
 980         data = dbwrap_fetch_bystring(regdb, tmp_ctx, tdbkey);
 981         if (data.dptr == NULL) {
 982                 err = WERR_BADFILE;
 983                 goto done;
 984         }
 985
 986         status = unmarshall_sec_desc(mem_ctx, (uint8 *)data.dptr, data.dsize,
 987                                      psecdesc);
 988
 989         if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
 990                 err = WERR_NOMEM;
 991         } else if (!NT_STATUS_IS_OK(status)) {
 992                 err = WERR_REG_CORRUPT;
 993         }
 994
 995 done:
 996         TALLOC_FREE(tmp_ctx);
 997         return err;
 998 }
 999
1000 static WERROR regdb_set_secdesc(const char *key,
1001                                 struct security_descriptor *secdesc)
1002 {
1003         TALLOC_CTX *mem_ctx = talloc_stackframe();
1004         char *tdbkey;
1005         NTSTATUS status;
1006         WERROR err = WERR_NOMEM;
1007         TDB_DATA tdbdata;
1008
1009         tdbkey = talloc_asprintf(mem_ctx, "%s/%s", REG_SECDESC_PREFIX, key);
1010         if (tdbkey == NULL) {
1011                 goto done;
1012         }
1013         normalize_dbkey(tdbkey);
1014
1015         if (secdesc == NULL) {
1016                 /* assuming a delete */
1017                 status = dbwrap_trans_delete(regdb,
1018                                              string_term_tdb_data(tdbkey));
1019                 if (NT_STATUS_IS_OK(status)) {
1020                         err = WERR_OK;
1021                 } else {
1022                         err = ntstatus_to_werror(status);
1023                 }
1024                 goto done;
1025         }
1026
1027         err = ntstatus_to_werror(marshall_sec_desc(mem_ctx, secdesc,
1028                                                    &tdbdata.dptr,
1029                                                    &tdbdata.dsize));
1030         if (!W_ERROR_IS_OK(err)) {
1031                 goto done;
1032         }
1033
1034         status = dbwrap_trans_store(regdb, string_term_tdb_data(tdbkey),
1035                                     tdbdata, 0);
1036         if (!NT_STATUS_IS_OK(status)) {
1037                 err = ntstatus_to_werror(status);
1038                 goto done;
1039         }
1040
1041  done:
1042         TALLOC_FREE(mem_ctx);
1043         return err;
1044 }
1045
1046 bool regdb_subkeys_need_update(REGSUBKEY_CTR *subkeys)
1047 {
1048         return (regdb_get_seqnum() != subkeys->seqnum);
1049 }
1050
1051 bool regdb_values_need_update(REGVAL_CTR *values)
1052 {
1053         return (regdb_get_seqnum() != values->seqnum);
1054 }
1055
1056 /*
1057  * Table of function pointers for default access
1058  */
1059
1060 REGISTRY_OPS regdb_ops = {
1061         .fetch_subkeys = regdb_fetch_keys,
1062         .fetch_values = regdb_fetch_values,
1063         .store_subkeys = regdb_store_keys,
1064         .store_values = regdb_store_values,
1065         .get_secdesc = regdb_get_secdesc,
1066         .set_secdesc = regdb_set_secdesc,
1067         .subkeys_need_update = regdb_subkeys_need_update,
1068         .values_need_update = regdb_values_need_update
1069 };