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