source3/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         "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Print\\Monitors",
  50         KEY_PROD_OPTIONS,
  51         "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Terminal Server\\DefaultUserConfiguration",
  52         KEY_TCPIP_PARAMS,
  53         KEY_NETLOGON_PARAMS,
  54         KEY_HKU,
  55         KEY_HKCR,
  56         KEY_HKPD,
  57         KEY_HKPT,
  58          NULL };
  59
  60 struct builtin_regkey_value {
  61         const char *path;
  62         const char *valuename;
  63         uint32 type;
  64         union {
  65                 const char *string;
  66                 uint32 dw_value;
  67         } data;
  68 };
  69
  70 static struct builtin_regkey_value builtin_registry_values[] = {
  71         { KEY_PRINTING_PORTS,
  72                 SAMBA_PRINTER_PORT_NAME, REG_SZ, { "" } },
  73         { KEY_PRINTING_2K,
  74                 "DefaultSpoolDirectory", REG_SZ, { "C:\\Windows\\System32\\Spool\\Printers" } },
  75         { KEY_EVENTLOG,
  76                 "DisplayName", REG_SZ, { "Event Log" } },
  77         { KEY_EVENTLOG,
  78                 "ErrorControl", REG_DWORD, { (char*)0x00000001 } },
  79         { NULL, NULL, 0, { NULL } }
  80 };
  81
  82 /***********************************************************************
  83  Open the registry data in the tdb
  84  ***********************************************************************/
  85
  86 static bool init_registry_data(void)
  87 {
  88         char *path = NULL;
  89         char *base = NULL;
  90         char *remaining = NULL;
  91         TALLOC_CTX *frame = NULL;
  92         char *keyname;
  93         char *subkeyname;
  94         REGSUBKEY_CTR *subkeys;
  95         REGVAL_CTR *values;
  96         int i;
  97         const char *p, *p2;
  98         UNISTR2 data;
  99
 100         /*
 101          * There are potentially quite a few store operations which are all
 102          * indiviually wrapped in tdb transactions. Wrapping them in a single
 103          * transaction gives just a single transaction_commit() to actually do
 104          * its fsync()s. See tdb/common/transaction.c for info about nested
 105          * transaction behaviour.
 106          */
 107
 108         if (regdb->transaction_start(regdb) == -1) {
 109                 DEBUG(0, ("init_registry_data: tdb_transaction_start "
 110                           "failed\n"));
 111                 return false;
 112         }
 113
 114         /* loop over all of the predefined paths and add each component */
 115
 116         for (i=0; builtin_registry_paths[i] != NULL; i++) {
 117
 118                 frame = talloc_stackframe();
 119
 120                 DEBUG(6, ("init_registry_data: Adding [%s]\n",
 121                           builtin_registry_paths[i]));
 122
 123                 path = talloc_strdup(frame, builtin_registry_paths[i]);
 124                 base = talloc_strdup(frame, "");
 125                 if (!path || !base) {
 126                         goto fail;
 127                 }
 128                 p = path;
 129
 130                 while (next_token_talloc(frame, &p, &keyname, "\\")) {
 131
 132                         /* build up the registry path from the components */
 133
 134                         if (*base) {
 135                                 base = talloc_asprintf(frame, "%s\\", base);
 136                                 if (!base) {
 137                                         goto fail;
 138                                 }
 139                         }
 140                         base = talloc_asprintf_append(base, "%s", keyname);
 141                         if (!base) {
 142                                 goto fail;
 143                         }
 144
 145                         /* get the immediate subkeyname (if we have one ) */
 146
 147                         subkeyname = talloc_strdup(frame, "");
 148                         if (!subkeyname) {
 149                                 goto fail;
 150                         }
 151                         if (*p) {
 152                                 remaining = talloc_strdup(frame, p);
 153                                 if (!remaining) {
 154                                         goto fail;
 155                                 }
 156                                 p2 = remaining;
 157
 158                                 if (!next_token_talloc(frame, &p2,
 159                                                         &subkeyname, "\\"))
 160                                 {
 161                                         subkeyname = talloc_strdup(frame,p2);
 162                                         if (!subkeyname) {
 163                                                 goto fail;
 164                                         }
 165                                 }
 166                         }
 167
 168                         DEBUG(10,("init_registry_data: Storing key [%s] with "
 169                                   "subkey [%s]\n", base,
 170                                   *subkeyname ? subkeyname : "NULL"));
 171
 172                         /* we don't really care if the lookup succeeds or not
 173                          * since we are about to update the record.
 174                          * We just want any subkeys already present */
 175
 176                         if (!(subkeys = TALLOC_ZERO_P(frame, REGSUBKEY_CTR))) {
 177                                 DEBUG(0,("talloc() failure!\n"));
 178                                 goto fail;
 179                         }
 180
 181                         regdb_fetch_keys(base, subkeys);
 182                         if (*subkeyname) {
 183                                 regsubkey_ctr_addkey( subkeys, subkeyname);
 184                         }
 185                         if (!regdb_store_keys( base, subkeys)) {
 186                                 goto fail;
 187                         }
 188                 }
 189
 190                 TALLOC_FREE(frame);
 191         }
 192
 193         /* loop over all of the predefined values and add each component */
 194
 195         frame = talloc_stackframe();
 196
 197         for (i=0; builtin_registry_values[i].path != NULL; i++) {
 198
 199                 if (!(values = TALLOC_ZERO_P(frame, REGVAL_CTR))) {
 200                         goto fail;
 201                 }
 202
 203                 regdb_fetch_values(builtin_registry_values[i].path, values);
 204
 205                 /* preserve existing values across restarts. Only add new ones */
 206
 207                 if (!regval_ctr_key_exists(values,
 208                                         builtin_registry_values[i].valuename))
 209                 {
 210                         switch(builtin_registry_values[i].type) {
 211                         case REG_DWORD:
 212                                 regval_ctr_addvalue(values,
 213                                         builtin_registry_values[i].valuename,
 214                                         REG_DWORD,
 215                                         (char*)&builtin_registry_values[i].data.dw_value,
 216                                         sizeof(uint32));
 217                                 break;
 218
 219                         case REG_SZ:
 220                                 init_unistr2(&data,
 221                                         builtin_registry_values[i].data.string,
 222                                         UNI_STR_TERMINATE);
 223                                 regval_ctr_addvalue(values,
 224                                         builtin_registry_values[i].valuename,
 225                                         REG_SZ,
 226                                         (char*)data.buffer,
 227                                         data.uni_str_len*sizeof(uint16));
 228                                 break;
 229
 230                         default:
 231                                 DEBUG(0, ("init_registry_data: invalid value "
 232                                           "type in builtin_registry_values "
 233                                           "[%d]\n",
 234                                           builtin_registry_values[i].type));
 235                         }
 236                         regdb_store_values(builtin_registry_values[i].path,
 237                                            values);
 238                 }
 239                 TALLOC_FREE(values);
 240         }
 241
 242         TALLOC_FREE(frame);
 243
 244         if (regdb->transaction_commit(regdb) == -1) {
 245                 DEBUG(0, ("init_registry_data: Could not commit "
 246                           "transaction\n"));
 247                 return false;
 248         }
 249
 250         return true;
 251
 252  fail:
 253
 254         TALLOC_FREE(frame);
 255
 256         if (regdb->transaction_cancel(regdb) == -1) {
 257                 smb_panic("init_registry_data: tdb_transaction_cancel "
 258                           "failed\n");
 259         }
 260
 261         return false;
 262 }
 263
 264 /***********************************************************************
 265  Open the registry database
 266  ***********************************************************************/
 267
 268 bool regdb_init( void )
 269 {
 270         const char *vstring = "INFO/version";
 271         uint32 vers_id;
 272
 273         if ( regdb ) {
 274                 DEBUG(10,("regdb_init: incrementing refcount (%d)\n", regdb_refcount));
 275                 regdb_refcount++;
 276                 return true;
 277         }
 278
 279         if ( !(regdb = db_open(NULL, state_path("registry.tdb"), 0, REG_TDB_FLAGS, O_RDWR, 0600)) )
 280         {
 281                 regdb = db_open(NULL, state_path("registry.tdb"), 0, REG_TDB_FLAGS, O_RDWR|O_CREAT, 0600);
 282                 if ( !regdb ) {
 283                         DEBUG(0,("regdb_init: Failed to open registry %s (%s)\n",
 284                                 state_path("registry.tdb"), strerror(errno) ));
 285                         return false;
 286                 }
 287
 288                 DEBUG(10,("regdb_init: Successfully created registry tdb\n"));
 289         }
 290
 291         regdb_refcount = 1;
 292
 293         vers_id = dbwrap_fetch_int32(regdb, vstring);
 294
 295         if ( vers_id != REGVER_V1 ) {
 296                 /* any upgrade code here if needed */
 297                 DEBUG(10, ("regdb_init: got INFO/version = %d != %d\n",
 298                            vers_id, REGVER_V1));
 299         }
 300
 301         /* always setup the necessary keys and values */
 302
 303         if ( !init_registry_data() ) {
 304                 DEBUG(0,("regdb_init: Failed to initialize data in registry!\n"));
 305                 return false;
 306         }
 307
 308         return true;
 309 }
 310
 311 /***********************************************************************
 312  Open the registry.  Must already have been initialized by regdb_init()
 313  ***********************************************************************/
 314
 315 WERROR regdb_open( void )
 316 {
 317         WERROR result = WERR_OK;
 318
 319         if ( regdb ) {
 320                 DEBUG(10,("regdb_open: incrementing refcount (%d)\n", regdb_refcount));
 321                 regdb_refcount++;
 322                 return WERR_OK;
 323         }
 324
 325         become_root();
 326
 327         regdb = db_open(NULL, state_path("registry.tdb"), 0, REG_TDB_FLAGS, O_RDWR, 0600);
 328         if ( !regdb ) {
 329                 result = ntstatus_to_werror( map_nt_error_from_unix( errno ) );
 330                 DEBUG(0,("regdb_open: Failed to open %s! (%s)\n",
 331                         state_path("registry.tdb"), strerror(errno) ));
 332         }
 333
 334         unbecome_root();
 335
 336         regdb_refcount = 1;
 337         DEBUG(10,("regdb_open: refcount reset (%d)\n", regdb_refcount));
 338
 339         return result;
 340 }
 341
 342 /***********************************************************************
 343  ***********************************************************************/
 344
 345 int regdb_close( void )
 346 {
 347         if (regdb_refcount == 0) {
 348                 return 0;
 349         }
 350
 351         regdb_refcount--;
 352
 353         DEBUG(10,("regdb_close: decrementing refcount (%d)\n", regdb_refcount));
 354
 355         if ( regdb_refcount > 0 )
 356                 return 0;
 357
 358         SMB_ASSERT( regdb_refcount >= 0 );
 359
 360         TALLOC_FREE(regdb);
 361         return 0;
 362 }
 363
 364 /***********************************************************************
 365  return the tdb sequence number of the registry tdb.
 366  this is an indicator for the content of the registry
 367  having changed. it will change upon regdb_init, too, though.
 368  ***********************************************************************/
 369 int regdb_get_seqnum(void)
 370 {
 371         return regdb->get_seqnum(regdb);
 372 }
 373
 374 /***********************************************************************
 375  Add subkey strings to the registry tdb under a defined key
 376  fmt is the same format as tdb_pack except this function only supports
 377  fstrings
 378  ***********************************************************************/
 379
 380 static bool regdb_store_keys_internal(const char *key, REGSUBKEY_CTR *ctr)
 381 {
 382         TDB_DATA dbuf;
 383         uint8 *buffer = NULL;
 384         int i = 0;
 385         uint32 len, buflen;
 386         bool ret = true;
 387         uint32 num_subkeys = regsubkey_ctr_numkeys(ctr);
 388         char *keyname = NULL;
 389         TALLOC_CTX *ctx = talloc_stackframe();
 390         NTSTATUS status;
 391
 392         if (!key) {
 393                 return false;
 394         }
 395
 396         keyname = talloc_strdup(ctx, key);
 397         if (!keyname) {
 398                 return false;
 399         }
 400         keyname = normalize_reg_path(ctx, keyname);
 401
 402         /* allocate some initial memory */
 403
 404         buffer = (uint8 *)SMB_MALLOC(1024);
 405         if (buffer == NULL) {
 406                 return false;
 407         }
 408         buflen = 1024;
 409         len = 0;
 410
 411         /* store the number of subkeys */
 412
 413         len += tdb_pack(buffer+len, buflen-len, "d", num_subkeys);
 414
 415         /* pack all the strings */
 416
 417         for (i=0; i<num_subkeys; i++) {
 418                 len += tdb_pack(buffer+len, buflen-len, "f",
 419                                 regsubkey_ctr_specific_key(ctr, i));
 420                 if (len > buflen) {
 421                         /* allocate some extra space */
 422                         buffer = (uint8 *)SMB_REALLOC(buffer, len*2);
 423                         if(buffer == NULL) {
 424                                 DEBUG(0, ("regdb_store_keys: Failed to realloc "
 425                                           "memory of size [%d]\n", len*2));
 426                                 ret = false;
 427                                 goto done;
 428                         }
 429                         buflen = len*2;
 430                         len = tdb_pack(buffer+len, buflen-len, "f",
 431                                        regsubkey_ctr_specific_key(ctr, i));
 432                 }
 433         }
 434
 435         /* finally write out the data */
 436
 437         dbuf.dptr = buffer;
 438         dbuf.dsize = len;
 439         status = dbwrap_store_bystring(regdb, keyname, dbuf, TDB_REPLACE);
 440         if (!NT_STATUS_IS_OK(status)) {
 441                 ret = false;
 442                 goto done;
 443         }
 444
 445 done:
 446         TALLOC_FREE(ctx);
 447         SAFE_FREE(buffer);
 448         return ret;
 449 }
 450
 451 /***********************************************************************
 452  Store the new subkey record and create any child key records that
 453  do not currently exist
 454  ***********************************************************************/
 455
 456 bool regdb_store_keys(const char *key, REGSUBKEY_CTR *ctr)
 457 {
 458         int num_subkeys, i;
 459         char *path = NULL;
 460         REGSUBKEY_CTR *subkeys = NULL, *old_subkeys = NULL;
 461         char *oldkeyname = NULL;
 462         TALLOC_CTX *ctx = talloc_stackframe();
 463         NTSTATUS status;
 464
 465         /*
 466          * fetch a list of the old subkeys so we can determine if anything has
 467          * changed
 468          */
 469
 470         if (!(old_subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR))) {
 471                 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 472                 return false;
 473         }
 474
 475         regdb_fetch_keys(key, old_subkeys);
 476
 477         if ((ctr->num_subkeys && old_subkeys->num_subkeys) &&
 478             (ctr->num_subkeys == old_subkeys->num_subkeys)) {
 479
 480                 for (i = 0; i<ctr->num_subkeys; i++) {
 481                         if (strcmp(ctr->subkeys[i],
 482                                    old_subkeys->subkeys[i]) != 0) {
 483                                 break;
 484                         }
 485                 }
 486                 if (i == ctr->num_subkeys) {
 487                         /*
 488                          * Nothing changed, no point to even start a tdb
 489                          * transaction
 490                          */
 491                         TALLOC_FREE(old_subkeys);
 492                         return true;
 493                 }
 494         }
 495
 496         TALLOC_FREE(old_subkeys);
 497
 498         if (regdb->transaction_start(regdb) == -1) {
 499                 DEBUG(0, ("regdb_store_keys: transaction_start failed\n"));
 500                 goto fail;
 501         }
 502
 503         /*
 504          * Re-fetch the old keys inside the transaction
 505          */
 506
 507         if (!(old_subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR))) {
 508                 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 509                 goto cancel;
 510         }
 511
 512         regdb_fetch_keys(key, old_subkeys);
 513
 514         /* store the subkey list for the parent */
 515
 516         if (!regdb_store_keys_internal(key, ctr) ) {
 517                 DEBUG(0,("regdb_store_keys: Failed to store new subkey list "
 518                          "for parent [%s]\n", key));
 519                 goto cancel;
 520         }
 521
 522         /* now delete removed keys */
 523
 524         num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
 525         for (i=0; i<num_subkeys; i++) {
 526                 oldkeyname = regsubkey_ctr_specific_key(old_subkeys, i);
 527
 528                 if (regsubkey_ctr_key_exists(ctr, oldkeyname)) {
 529                         /*
 530                          * It's still around, don't delete
 531                          */
 532
 533                         continue;
 534                 }
 535
 536                 path = talloc_asprintf(ctx, "%s/%s", key, oldkeyname);
 537                 if (!path) {
 538                         goto cancel;
 539                 }
 540                 path = normalize_reg_path(ctx, path);
 541                 if (!path) {
 542                         goto cancel;
 543                 }
 544                 status = dbwrap_delete_bystring(regdb, path);
 545                 if (!NT_STATUS_IS_OK(status)) {
 546                         DEBUG(1, ("Deleting %s failed\n", path));
 547                         goto cancel;
 548                 }
 549
 550                 TALLOC_FREE(path);
 551                 path = talloc_asprintf(ctx, "%s/%s/%s",
 552                                 REG_VALUE_PREFIX,
 553                                 key,
 554                                 oldkeyname );
 555                 if (!path) {
 556                         goto cancel;
 557                 }
 558                 path = normalize_reg_path(ctx, path);
 559                 if (!path) {
 560                         goto cancel;
 561                 }
 562
 563                 /*
 564                  * Ignore errors here, we might have no values around
 565                  */
 566                 dbwrap_delete_bystring(regdb, path);
 567                 TALLOC_FREE(path);
 568         }
 569
 570         TALLOC_FREE(old_subkeys);
 571
 572         /* now create records for any subkeys that don't already exist */
 573
 574         num_subkeys = regsubkey_ctr_numkeys(ctr);
 575
 576         if (num_subkeys == 0) {
 577                 if (!(subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR)) ) {
 578                         DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 579                         goto cancel;
 580                 }
 581
 582                 if (!regdb_store_keys_internal(key, subkeys)) {
 583                         DEBUG(0,("regdb_store_keys: Failed to store "
 584                                  "new record for key [%s]\n", key));
 585                         goto cancel;
 586                 }
 587                 TALLOC_FREE(subkeys);
 588
 589         }
 590
 591         for (i=0; i<num_subkeys; i++) {
 592                 path = talloc_asprintf(ctx, "%s/%s",
 593                                         key,
 594                                         regsubkey_ctr_specific_key(ctr, i));
 595                 if (!path) {
 596                         goto cancel;
 597                 }
 598                 if (!(subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR)) ) {
 599                         DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 600                         goto cancel;
 601                 }
 602
 603                 if (regdb_fetch_keys( path, subkeys ) == -1) {
 604                         /* create a record with 0 subkeys */
 605                         if (!regdb_store_keys_internal(path, subkeys)) {
 606                                 DEBUG(0,("regdb_store_keys: Failed to store "
 607                                          "new record for key [%s]\n", path));
 608                                 goto cancel;
 609                         }
 610                 }
 611
 612                 TALLOC_FREE(subkeys);
 613                 TALLOC_FREE(path);
 614         }
 615
 616         if (regdb->transaction_commit(regdb) == -1) {
 617                 DEBUG(0, ("regdb_store_keys: Could not commit transaction\n"));
 618                 goto fail;
 619         }
 620
 621         TALLOC_FREE(ctx);
 622         return true;
 623
 624 cancel:
 625         if (regdb->transaction_cancel(regdb) == -1) {
 626                 smb_panic("regdb_store_keys: transaction_cancel failed\n");
 627         }
 628
 629 fail:
 630         TALLOC_FREE(ctx);
 631
 632         return false;
 633 }
 634
 635
 636 /***********************************************************************
 637  Retrieve an array of strings containing subkeys.  Memory should be
 638  released by the caller.
 639  ***********************************************************************/
 640
 641 int regdb_fetch_keys(const char *key, REGSUBKEY_CTR *ctr)
 642 {
 643         char *path = NULL;
 644         uint32 num_items;
 645         uint8 *buf;
 646         uint32 buflen, len;
 647         int i;
 648         fstring subkeyname;
 649         int ret = -1;
 650         TALLOC_CTX *frame = talloc_stackframe();
 651         struct db_record *rec;
 652
 653         DEBUG(11,("regdb_fetch_keys: Enter key => [%s]\n", key ? key : "NULL"));
 654
 655         path = talloc_strdup(frame, key);
 656         if (!path) {
 657                 goto fail;
 658         }
 659
 660         /* convert to key format */
 661         path = talloc_string_sub(frame, path, "\\", "/");
 662         if (!path) {
 663                 goto fail;
 664         }
 665         strupper_m(path);
 666
 667         rec = regdb->fetch_locked(regdb, frame, string_term_tdb_data(path));
 668         if (rec == NULL) {
 669                 ret = 0;
 670                 goto fail;
 671         }
 672
 673         ctr->seqnum = regdb_get_seqnum();
 674
 675         buf = rec->value.dptr;
 676         buflen = rec->value.dsize;
 677
 678         if ( !buf ) {
 679                 DEBUG(5,("regdb_fetch_keys: tdb lookup failed to locate key [%s]\n", key));
 680                 goto fail;
 681         }
 682
 683         len = tdb_unpack( buf, buflen, "d", &num_items);
 684
 685         for (i=0; i<num_items; i++) {
 686                 len += tdb_unpack(buf+len, buflen-len, "f", subkeyname);
 687                 regsubkey_ctr_addkey(ctr, subkeyname);
 688         }
 689
 690         DEBUG(11,("regdb_fetch_keys: Exit [%d] items\n", num_items));
 691
 692         ret = num_items;
 693  fail:
 694         TALLOC_FREE(frame);
 695         return ret;
 696 }
 697
 698 /****************************************************************************
 699  Unpack a list of registry values frem the TDB
 700  ***************************************************************************/
 701
 702 static int regdb_unpack_values(REGVAL_CTR *values, uint8 *buf, int buflen)
 703 {
 704         int             len = 0;
 705         uint32          type;
 706         fstring valuename;
 707         uint32          size;
 708         uint8           *data_p;
 709         uint32          num_values = 0;
 710         int             i;
 711
 712         /* loop and unpack the rest of the registry values */
 713
 714         len += tdb_unpack(buf+len, buflen-len, "d", &num_values);
 715
 716         for ( i=0; i<num_values; i++ ) {
 717                 /* unpack the next regval */
 718
 719                 type = REG_NONE;
 720                 size = 0;
 721                 data_p = NULL;
 722                 valuename[0] = '\0';
 723                 len += tdb_unpack(buf+len, buflen-len, "fdB",
 724                                   valuename,
 725                                   &type,
 726                                   &size,
 727                                   &data_p);
 728
 729                 /* add the new value. Paranoid protective code -- make sure data_p is valid */
 730
 731                 if (*valuename && size && data_p) {
 732                         regval_ctr_addvalue(values, valuename, type,
 733                                         (const char *)data_p, size);
 734                 }
 735                 SAFE_FREE(data_p); /* 'B' option to tdb_unpack does a malloc() */
 736
 737                 DEBUG(8,("specific: [%s], len: %d\n", valuename, size));
 738         }
 739
 740         return len;
 741 }
 742
 743 /****************************************************************************
 744  Pack all values in all printer keys
 745  ***************************************************************************/
 746
 747 static int regdb_pack_values(REGVAL_CTR *values, uint8 *buf, int buflen)
 748 {
 749         int             len = 0;
 750         int             i;
 751         REGISTRY_VALUE  *val;
 752         int             num_values;
 753
 754         if ( !values )
 755                 return 0;
 756
 757         num_values = regval_ctr_numvals( values );
 758
 759         /* pack the number of values first */
 760
 761         len += tdb_pack( buf+len, buflen-len, "d", num_values );
 762
 763         /* loop over all values */
 764
 765         for ( i=0; i<num_values; i++ ) {
 766                 val = regval_ctr_specific_value( values, i );
 767                 len += tdb_pack(buf+len, buflen-len, "fdB",
 768                                 regval_name(val),
 769                                 regval_type(val),
 770                                 regval_size(val),
 771                                 regval_data_p(val) );
 772         }
 773
 774         return len;
 775 }
 776
 777 /***********************************************************************
 778  Retrieve an array of strings containing subkeys.  Memory should be
 779  released by the caller.
 780  ***********************************************************************/
 781
 782 int regdb_fetch_values( const char* key, REGVAL_CTR *values )
 783 {
 784         char *keystr = NULL;
 785         TALLOC_CTX *ctx = talloc_stackframe();
 786         struct db_record *rec;
 787         int ret = 0;
 788
 789         DEBUG(10,("regdb_fetch_values: Looking for value of key [%s] \n", key));
 790
 791         keystr = talloc_asprintf(ctx, "%s/%s", REG_VALUE_PREFIX, key);
 792         if (!keystr) {
 793                 return 0;
 794         }
 795         keystr = normalize_reg_path(ctx, keystr);
 796         if (!keystr) {
 797                 goto done;
 798         }
 799
 800         rec = regdb->fetch_locked(regdb, ctx, string_term_tdb_data(keystr));
 801         if (rec == NULL) {
 802                 goto done;
 803         }
 804
 805         values->seqnum = regdb_get_seqnum();
 806
 807         if (!rec->value.dptr) {
 808                 /* all keys have zero values by default */
 809                 goto done;
 810         }
 811
 812         regdb_unpack_values(values, rec->value.dptr, rec->value.dsize);
 813         ret = regval_ctr_numvals(values);
 814
 815 done:
 816         TALLOC_FREE(ctx);
 817         return ret;
 818 }
 819
 820 bool regdb_store_values( const char *key, REGVAL_CTR *values )
 821 {
 822         TDB_DATA old_data, data;
 823         char *keystr = NULL;
 824         TALLOC_CTX *ctx = talloc_stackframe();
 825         int len, ret;
 826         bool result = false;
 827
 828         DEBUG(10,("regdb_store_values: Looking for value of key [%s] \n", key));
 829
 830         ZERO_STRUCT(data);
 831
 832         len = regdb_pack_values(values, data.dptr, data.dsize);
 833         if (len <= 0) {
 834                 DEBUG(0,("regdb_store_values: unable to pack values. len <= 0\n"));
 835                 goto done;
 836         }
 837
 838         data.dptr = TALLOC_ARRAY(ctx, uint8, len);
 839         data.dsize = len;
 840
 841         len = regdb_pack_values(values, data.dptr, data.dsize);
 842
 843         SMB_ASSERT( len == data.dsize );
 844
 845         keystr = talloc_asprintf(ctx, "%s/%s", REG_VALUE_PREFIX, key );
 846         if (!keystr) {
 847                 goto done;
 848         }
 849         keystr = normalize_reg_path(ctx, keystr);
 850         if (!keystr) {
 851                 goto done;
 852         }
 853
 854         old_data = dbwrap_fetch_bystring(regdb, ctx, keystr);
 855
 856         if ((old_data.dptr != NULL)
 857             && (old_data.dsize == data.dsize)
 858             && (memcmp(old_data.dptr, data.dptr, data.dsize) == 0))
 859         {
 860                 result = true;
 861                 goto done;
 862         }
 863
 864         ret = dbwrap_trans_store(regdb, string_term_tdb_data(keystr), data,
 865                                  TDB_REPLACE);
 866         result = (ret != -1);
 867
 868 done:
 869         TALLOC_FREE(ctx);
 870         return result;
 871 }
 872
 873 static WERROR regdb_get_secdesc(TALLOC_CTX *mem_ctx, const char *key,
 874                                 struct security_descriptor **psecdesc)
 875 {
 876         char *tdbkey;
 877         TDB_DATA data;
 878         NTSTATUS status;
 879         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 880
 881         DEBUG(10, ("regdb_get_secdesc: Getting secdesc of key [%s]\n", key));
 882
 883         if (asprintf(&tdbkey, "%s/%s", REG_SECDESC_PREFIX, key) == -1) {
 884                 return WERR_NOMEM;
 885         }
 886         normalize_dbkey(tdbkey);
 887
 888         data = dbwrap_fetch_bystring(regdb, tmp_ctx, tdbkey);
 889         SAFE_FREE(tdbkey);
 890
 891         if (data.dptr == NULL) {
 892                 return WERR_BADFILE;
 893         }
 894
 895         status = unmarshall_sec_desc(mem_ctx, (uint8 *)data.dptr, data.dsize,
 896                                      psecdesc);
 897
 898         TALLOC_FREE(tmp_ctx);
 899
 900         if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
 901                 return WERR_NOMEM;
 902         }
 903
 904         if (!NT_STATUS_IS_OK(status)) {
 905                 return WERR_REG_CORRUPT;
 906         }
 907
 908         return WERR_OK;
 909 }
 910
 911 static WERROR regdb_set_secdesc(const char *key,
 912                                 struct security_descriptor *secdesc)
 913 {
 914         prs_struct ps;
 915         TALLOC_CTX *mem_ctx = talloc_stackframe();
 916         char *tdbkey;
 917         WERROR err = WERR_NOMEM;
 918         TDB_DATA tdbdata;
 919         int tdb_ret;
 920
 921
 922         ZERO_STRUCT(ps);
 923
 924         tdbkey = talloc_asprintf(mem_ctx, "%s/%s", REG_SECDESC_PREFIX, key);
 925         if (tdbkey == NULL) {
 926                 goto done;
 927         }
 928         normalize_dbkey(tdbkey);
 929
 930         if (secdesc == NULL) {
 931                 /* assuming a delete */
 932                 tdb_ret = dbwrap_trans_delete(regdb,
 933                                               string_term_tdb_data(tdbkey));
 934                 if (tdb_ret == -1) {
 935                         err = ntstatus_to_werror(map_nt_error_from_unix(errno));
 936                 } else {
 937                         err = WERR_OK;
 938                 }
 939
 940                 goto done;
 941         }
 942
 943         err = ntstatus_to_werror(marshall_sec_desc(mem_ctx, secdesc,
 944                                                    &tdbdata.dptr,
 945                                                    &tdbdata.dsize));
 946         if (!W_ERROR_IS_OK(err)) {
 947                 goto done;
 948         }
 949
 950         tdb_ret = dbwrap_trans_store(regdb, string_term_tdb_data(tdbkey),
 951                                      tdbdata, 0);
 952         if (tdb_ret == -1) {
 953                 err = ntstatus_to_werror(map_nt_error_from_unix(errno));
 954                 goto done;
 955         }
 956
 957  done:
 958         prs_mem_free(&ps);
 959         TALLOC_FREE(mem_ctx);
 960         return err;
 961 }
 962
 963 bool regdb_subkeys_need_update(REGSUBKEY_CTR *subkeys)
 964 {
 965         return (regdb_get_seqnum() != subkeys->seqnum);
 966 }
 967
 968 bool regdb_values_need_update(REGVAL_CTR *values)
 969 {
 970         return (regdb_get_seqnum() != values->seqnum);
 971 }
 972
 973 /*
 974  * Table of function pointers for default access
 975  */
 976
 977 REGISTRY_OPS regdb_ops = {
 978         regdb_fetch_keys,
 979         regdb_fetch_values,
 980         regdb_store_keys,
 981         regdb_store_values,
 982         NULL,
 983         regdb_get_secdesc,
 984         regdb_set_secdesc,
 985         regdb_subkeys_need_update,
 986         regdb_values_need_update
 987 };