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 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) == -1) {
 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) == -1) {
 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) == -1) {
 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) == -1) {
 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) == -1) {
 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) == -1) {
 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(NULL, state_path("registry.tdb"), 0, REG_TDB_FLAGS,
 334                         O_RDWR, 0600);
 335         if (!regdb) {
 336                 regdb = db_open(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                 /* any upgrade code here if needed */
 353                 DEBUG(10, ("regdb_init: got %s = %d != %d\n", vstring,
 354                            vers_id, REGVER_V1));
 355                 if (dbwrap_trans_store_int32(regdb, vstring, REGVER_V1) != 0) {
 356                         DEBUG(0, ("regdb_init: error storing %s = %d\n",
 357                                   vstring, REGVER_V1));
 358                         return false;
 359                 } else {
 360                         DEBUG(10, ("regdb_init: stored %s = %d\n",
 361                                   vstring, REGVER_V1));
 362                 }
 363         }
 364
 365         return true;
 366 }
 367
 368 /***********************************************************************
 369  Open the registry.  Must already have been initialized by regdb_init()
 370  ***********************************************************************/
 371
 372 WERROR regdb_open( void )
 373 {
 374         WERROR result = WERR_OK;
 375
 376         if ( regdb ) {
 377                 DEBUG(10,("regdb_open: incrementing refcount (%d)\n", regdb_refcount));
 378                 regdb_refcount++;
 379                 return WERR_OK;
 380         }
 381
 382         become_root();
 383
 384         regdb = db_open(NULL, state_path("registry.tdb"), 0, REG_TDB_FLAGS, O_RDWR, 0600);
 385         if ( !regdb ) {
 386                 result = ntstatus_to_werror( map_nt_error_from_unix( errno ) );
 387                 DEBUG(0,("regdb_open: Failed to open %s! (%s)\n",
 388                         state_path("registry.tdb"), strerror(errno) ));
 389         }
 390
 391         unbecome_root();
 392
 393         regdb_refcount = 1;
 394         DEBUG(10,("regdb_open: refcount reset (%d)\n", regdb_refcount));
 395
 396         return result;
 397 }
 398
 399 /***********************************************************************
 400  ***********************************************************************/
 401
 402 int regdb_close( void )
 403 {
 404         if (regdb_refcount == 0) {
 405                 return 0;
 406         }
 407
 408         regdb_refcount--;
 409
 410         DEBUG(10,("regdb_close: decrementing refcount (%d)\n", regdb_refcount));
 411
 412         if ( regdb_refcount > 0 )
 413                 return 0;
 414
 415         SMB_ASSERT( regdb_refcount >= 0 );
 416
 417         TALLOC_FREE(regdb);
 418         return 0;
 419 }
 420
 421 /***********************************************************************
 422  return the tdb sequence number of the registry tdb.
 423  this is an indicator for the content of the registry
 424  having changed. it will change upon regdb_init, too, though.
 425  ***********************************************************************/
 426 int regdb_get_seqnum(void)
 427 {
 428         return regdb->get_seqnum(regdb);
 429 }
 430
 431 /***********************************************************************
 432  Add subkey strings to the registry tdb under a defined key
 433  fmt is the same format as tdb_pack except this function only supports
 434  fstrings
 435  ***********************************************************************/
 436
 437 static bool regdb_store_keys_internal(const char *key, REGSUBKEY_CTR *ctr)
 438 {
 439         TDB_DATA dbuf;
 440         uint8 *buffer = NULL;
 441         int i = 0;
 442         uint32 len, buflen;
 443         bool ret = true;
 444         uint32 num_subkeys = regsubkey_ctr_numkeys(ctr);
 445         char *keyname = NULL;
 446         TALLOC_CTX *ctx = talloc_stackframe();
 447         NTSTATUS status;
 448
 449         if (!key) {
 450                 return false;
 451         }
 452
 453         keyname = talloc_strdup(ctx, key);
 454         if (!keyname) {
 455                 return false;
 456         }
 457         keyname = normalize_reg_path(ctx, keyname);
 458
 459         /* allocate some initial memory */
 460
 461         buffer = (uint8 *)SMB_MALLOC(1024);
 462         if (buffer == NULL) {
 463                 return false;
 464         }
 465         buflen = 1024;
 466         len = 0;
 467
 468         /* store the number of subkeys */
 469
 470         len += tdb_pack(buffer+len, buflen-len, "d", num_subkeys);
 471
 472         /* pack all the strings */
 473
 474         for (i=0; i<num_subkeys; i++) {
 475                 len += tdb_pack(buffer+len, buflen-len, "f",
 476                                 regsubkey_ctr_specific_key(ctr, i));
 477                 if (len > buflen) {
 478                         /* allocate some extra space */
 479                         buffer = (uint8 *)SMB_REALLOC(buffer, len*2);
 480                         if(buffer == NULL) {
 481                                 DEBUG(0, ("regdb_store_keys: Failed to realloc "
 482                                           "memory of size [%d]\n", len*2));
 483                                 ret = false;
 484                                 goto done;
 485                         }
 486                         buflen = len*2;
 487                         len = tdb_pack(buffer+len, buflen-len, "f",
 488                                        regsubkey_ctr_specific_key(ctr, i));
 489                 }
 490         }
 491
 492         /* finally write out the data */
 493
 494         dbuf.dptr = buffer;
 495         dbuf.dsize = len;
 496         status = dbwrap_store_bystring(regdb, keyname, dbuf, TDB_REPLACE);
 497         if (!NT_STATUS_IS_OK(status)) {
 498                 ret = false;
 499                 goto done;
 500         }
 501
 502 done:
 503         TALLOC_FREE(ctx);
 504         SAFE_FREE(buffer);
 505         return ret;
 506 }
 507
 508 /***********************************************************************
 509  Store the new subkey record and create any child key records that
 510  do not currently exist
 511  ***********************************************************************/
 512
 513 bool regdb_store_keys(const char *key, REGSUBKEY_CTR *ctr)
 514 {
 515         int num_subkeys, i;
 516         char *path = NULL;
 517         REGSUBKEY_CTR *subkeys = NULL, *old_subkeys = NULL;
 518         char *oldkeyname = NULL;
 519         TALLOC_CTX *ctx = talloc_stackframe();
 520         NTSTATUS status;
 521
 522         /*
 523          * fetch a list of the old subkeys so we can determine if anything has
 524          * changed
 525          */
 526
 527         if (!(old_subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR))) {
 528                 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 529                 return false;
 530         }
 531
 532         regdb_fetch_keys(key, old_subkeys);
 533
 534         if ((ctr->num_subkeys && old_subkeys->num_subkeys) &&
 535             (ctr->num_subkeys == old_subkeys->num_subkeys)) {
 536
 537                 for (i = 0; i<ctr->num_subkeys; i++) {
 538                         if (strcmp(ctr->subkeys[i],
 539                                    old_subkeys->subkeys[i]) != 0) {
 540                                 break;
 541                         }
 542                 }
 543                 if (i == ctr->num_subkeys) {
 544                         /*
 545                          * Nothing changed, no point to even start a tdb
 546                          * transaction
 547                          */
 548                         TALLOC_FREE(old_subkeys);
 549                         return true;
 550                 }
 551         }
 552
 553         TALLOC_FREE(old_subkeys);
 554
 555         if (regdb->transaction_start(regdb) == -1) {
 556                 DEBUG(0, ("regdb_store_keys: transaction_start failed\n"));
 557                 goto fail;
 558         }
 559
 560         /*
 561          * Re-fetch the old keys inside the transaction
 562          */
 563
 564         if (!(old_subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR))) {
 565                 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 566                 goto cancel;
 567         }
 568
 569         regdb_fetch_keys(key, old_subkeys);
 570
 571         /* store the subkey list for the parent */
 572
 573         if (!regdb_store_keys_internal(key, ctr) ) {
 574                 DEBUG(0,("regdb_store_keys: Failed to store new subkey list "
 575                          "for parent [%s]\n", key));
 576                 goto cancel;
 577         }
 578
 579         /* now delete removed keys */
 580
 581         num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
 582         for (i=0; i<num_subkeys; i++) {
 583                 oldkeyname = regsubkey_ctr_specific_key(old_subkeys, i);
 584
 585                 if (regsubkey_ctr_key_exists(ctr, oldkeyname)) {
 586                         /*
 587                          * It's still around, don't delete
 588                          */
 589
 590                         continue;
 591                 }
 592
 593                 path = talloc_asprintf(ctx, "%s/%s", key, oldkeyname);
 594                 if (!path) {
 595                         goto cancel;
 596                 }
 597                 path = normalize_reg_path(ctx, path);
 598                 if (!path) {
 599                         goto cancel;
 600                 }
 601                 status = dbwrap_delete_bystring(regdb, path);
 602                 if (!NT_STATUS_IS_OK(status)) {
 603                         DEBUG(1, ("Deleting %s failed\n", path));
 604                         goto cancel;
 605                 }
 606
 607                 TALLOC_FREE(path);
 608                 path = talloc_asprintf(ctx, "%s/%s/%s",
 609                                 REG_VALUE_PREFIX,
 610                                 key,
 611                                 oldkeyname );
 612                 if (!path) {
 613                         goto cancel;
 614                 }
 615                 path = normalize_reg_path(ctx, path);
 616                 if (!path) {
 617                         goto cancel;
 618                 }
 619
 620                 /*
 621                  * Ignore errors here, we might have no values around
 622                  */
 623                 dbwrap_delete_bystring(regdb, path);
 624                 TALLOC_FREE(path);
 625         }
 626
 627         TALLOC_FREE(old_subkeys);
 628
 629         /* now create records for any subkeys that don't already exist */
 630
 631         num_subkeys = regsubkey_ctr_numkeys(ctr);
 632
 633         if (num_subkeys == 0) {
 634                 if (!(subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR)) ) {
 635                         DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 636                         goto cancel;
 637                 }
 638
 639                 if (!regdb_store_keys_internal(key, subkeys)) {
 640                         DEBUG(0,("regdb_store_keys: Failed to store "
 641                                  "new record for key [%s]\n", key));
 642                         goto cancel;
 643                 }
 644                 TALLOC_FREE(subkeys);
 645
 646         }
 647
 648         for (i=0; i<num_subkeys; i++) {
 649                 path = talloc_asprintf(ctx, "%s/%s",
 650                                         key,
 651                                         regsubkey_ctr_specific_key(ctr, i));
 652                 if (!path) {
 653                         goto cancel;
 654                 }
 655                 if (!(subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR)) ) {
 656                         DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 657                         goto cancel;
 658                 }
 659
 660                 if (regdb_fetch_keys( path, subkeys ) == -1) {
 661                         /* create a record with 0 subkeys */
 662                         if (!regdb_store_keys_internal(path, subkeys)) {
 663                                 DEBUG(0,("regdb_store_keys: Failed to store "
 664                                          "new record for key [%s]\n", path));
 665                                 goto cancel;
 666                         }
 667                 }
 668
 669                 TALLOC_FREE(subkeys);
 670                 TALLOC_FREE(path);
 671         }
 672
 673         if (regdb->transaction_commit(regdb) == -1) {
 674                 DEBUG(0, ("regdb_store_keys: Could not commit transaction\n"));
 675                 goto fail;
 676         }
 677
 678         TALLOC_FREE(ctx);
 679         return true;
 680
 681 cancel:
 682         if (regdb->transaction_cancel(regdb) == -1) {
 683                 smb_panic("regdb_store_keys: transaction_cancel failed\n");
 684         }
 685
 686 fail:
 687         TALLOC_FREE(ctx);
 688
 689         return false;
 690 }
 691
 692
 693 /***********************************************************************
 694  Retrieve an array of strings containing subkeys.  Memory should be
 695  released by the caller.
 696  ***********************************************************************/
 697
 698 int regdb_fetch_keys(const char *key, REGSUBKEY_CTR *ctr)
 699 {
 700         char *path = NULL;
 701         uint32 num_items;
 702         uint8 *buf;
 703         uint32 buflen, len;
 704         int i;
 705         fstring subkeyname;
 706         int ret = -1;
 707         TALLOC_CTX *frame = talloc_stackframe();
 708         struct db_record *rec;
 709
 710         DEBUG(11,("regdb_fetch_keys: Enter key => [%s]\n", key ? key : "NULL"));
 711
 712         path = talloc_strdup(frame, key);
 713         if (!path) {
 714                 goto fail;
 715         }
 716
 717         /* convert to key format */
 718         path = talloc_string_sub(frame, path, "\\", "/");
 719         if (!path) {
 720                 goto fail;
 721         }
 722         strupper_m(path);
 723
 724         rec = regdb->fetch_locked(regdb, frame, string_term_tdb_data(path));
 725         if (rec == NULL) {
 726                 ret = 0;
 727                 goto fail;
 728         }
 729
 730         ctr->seqnum = regdb_get_seqnum();
 731
 732         buf = rec->value.dptr;
 733         buflen = rec->value.dsize;
 734
 735         if ( !buf ) {
 736                 DEBUG(5,("regdb_fetch_keys: tdb lookup failed to locate key [%s]\n", key));
 737                 goto fail;
 738         }
 739
 740         len = tdb_unpack( buf, buflen, "d", &num_items);
 741
 742         for (i=0; i<num_items; i++) {
 743                 len += tdb_unpack(buf+len, buflen-len, "f", subkeyname);
 744                 regsubkey_ctr_addkey(ctr, subkeyname);
 745         }
 746
 747         DEBUG(11,("regdb_fetch_keys: Exit [%d] items\n", num_items));
 748
 749         ret = num_items;
 750  fail:
 751         TALLOC_FREE(frame);
 752         return ret;
 753 }
 754
 755 /****************************************************************************
 756  Unpack a list of registry values frem the TDB
 757  ***************************************************************************/
 758
 759 static int regdb_unpack_values(REGVAL_CTR *values, uint8 *buf, int buflen)
 760 {
 761         int             len = 0;
 762         uint32          type;
 763         fstring valuename;
 764         uint32          size;
 765         uint8           *data_p;
 766         uint32          num_values = 0;
 767         int             i;
 768
 769         /* loop and unpack the rest of the registry values */
 770
 771         len += tdb_unpack(buf+len, buflen-len, "d", &num_values);
 772
 773         for ( i=0; i<num_values; i++ ) {
 774                 /* unpack the next regval */
 775
 776                 type = REG_NONE;
 777                 size = 0;
 778                 data_p = NULL;
 779                 valuename[0] = '\0';
 780                 len += tdb_unpack(buf+len, buflen-len, "fdB",
 781                                   valuename,
 782                                   &type,
 783                                   &size,
 784                                   &data_p);
 785
 786                 /* add the new value. Paranoid protective code -- make sure data_p is valid */
 787
 788                 if (*valuename && size && data_p) {
 789                         regval_ctr_addvalue(values, valuename, type,
 790                                         (const char *)data_p, size);
 791                 }
 792                 SAFE_FREE(data_p); /* 'B' option to tdb_unpack does a malloc() */
 793
 794                 DEBUG(8,("specific: [%s], len: %d\n", valuename, size));
 795         }
 796
 797         return len;
 798 }
 799
 800 /****************************************************************************
 801  Pack all values in all printer keys
 802  ***************************************************************************/
 803
 804 static int regdb_pack_values(REGVAL_CTR *values, uint8 *buf, int buflen)
 805 {
 806         int             len = 0;
 807         int             i;
 808         REGISTRY_VALUE  *val;
 809         int             num_values;
 810
 811         if ( !values )
 812                 return 0;
 813
 814         num_values = regval_ctr_numvals( values );
 815
 816         /* pack the number of values first */
 817
 818         len += tdb_pack( buf+len, buflen-len, "d", num_values );
 819
 820         /* loop over all values */
 821
 822         for ( i=0; i<num_values; i++ ) {
 823                 val = regval_ctr_specific_value( values, i );
 824                 len += tdb_pack(buf+len, buflen-len, "fdB",
 825                                 regval_name(val),
 826                                 regval_type(val),
 827                                 regval_size(val),
 828                                 regval_data_p(val) );
 829         }
 830
 831         return len;
 832 }
 833
 834 /***********************************************************************
 835  Retrieve an array of strings containing subkeys.  Memory should be
 836  released by the caller.
 837  ***********************************************************************/
 838
 839 int regdb_fetch_values( const char* key, REGVAL_CTR *values )
 840 {
 841         char *keystr = NULL;
 842         TALLOC_CTX *ctx = talloc_stackframe();
 843         struct db_record *rec;
 844         int ret = 0;
 845
 846         DEBUG(10,("regdb_fetch_values: Looking for value of key [%s] \n", key));
 847
 848         keystr = talloc_asprintf(ctx, "%s/%s", REG_VALUE_PREFIX, key);
 849         if (!keystr) {
 850                 return 0;
 851         }
 852         keystr = normalize_reg_path(ctx, keystr);
 853         if (!keystr) {
 854                 goto done;
 855         }
 856
 857         rec = regdb->fetch_locked(regdb, ctx, string_term_tdb_data(keystr));
 858         if (rec == NULL) {
 859                 goto done;
 860         }
 861
 862         values->seqnum = regdb_get_seqnum();
 863
 864         if (!rec->value.dptr) {
 865                 /* all keys have zero values by default */
 866                 goto done;
 867         }
 868
 869         regdb_unpack_values(values, rec->value.dptr, rec->value.dsize);
 870         ret = regval_ctr_numvals(values);
 871
 872 done:
 873         TALLOC_FREE(ctx);
 874         return ret;
 875 }
 876
 877 bool regdb_store_values( const char *key, REGVAL_CTR *values )
 878 {
 879         TDB_DATA old_data, data;
 880         char *keystr = NULL;
 881         TALLOC_CTX *ctx = talloc_stackframe();
 882         int len, ret;
 883         bool result = false;
 884
 885         DEBUG(10,("regdb_store_values: Looking for value of key [%s] \n", key));
 886
 887         ZERO_STRUCT(data);
 888
 889         len = regdb_pack_values(values, data.dptr, data.dsize);
 890         if (len <= 0) {
 891                 DEBUG(0,("regdb_store_values: unable to pack values. len <= 0\n"));
 892                 goto done;
 893         }
 894
 895         data.dptr = TALLOC_ARRAY(ctx, uint8, len);
 896         data.dsize = len;
 897
 898         len = regdb_pack_values(values, data.dptr, data.dsize);
 899
 900         SMB_ASSERT( len == data.dsize );
 901
 902         keystr = talloc_asprintf(ctx, "%s/%s", REG_VALUE_PREFIX, key );
 903         if (!keystr) {
 904                 goto done;
 905         }
 906         keystr = normalize_reg_path(ctx, keystr);
 907         if (!keystr) {
 908                 goto done;
 909         }
 910
 911         old_data = dbwrap_fetch_bystring(regdb, ctx, keystr);
 912
 913         if ((old_data.dptr != NULL)
 914             && (old_data.dsize == data.dsize)
 915             && (memcmp(old_data.dptr, data.dptr, data.dsize) == 0))
 916         {
 917                 result = true;
 918                 goto done;
 919         }
 920
 921         ret = dbwrap_trans_store(regdb, string_term_tdb_data(keystr), data,
 922                                  TDB_REPLACE);
 923         result = (ret != -1);
 924
 925 done:
 926         TALLOC_FREE(ctx);
 927         return result;
 928 }
 929
 930 static WERROR regdb_get_secdesc(TALLOC_CTX *mem_ctx, const char *key,
 931                                 struct security_descriptor **psecdesc)
 932 {
 933         char *tdbkey;
 934         TDB_DATA data;
 935         NTSTATUS status;
 936         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 937         WERROR err = WERR_OK;
 938
 939         DEBUG(10, ("regdb_get_secdesc: Getting secdesc of key [%s]\n", key));
 940
 941         tdbkey = talloc_asprintf(tmp_ctx, "%s/%s", REG_SECDESC_PREFIX, key);
 942         if (tdbkey == NULL) {
 943                 err = WERR_NOMEM;
 944                 goto done;
 945         }
 946         normalize_dbkey(tdbkey);
 947
 948         data = dbwrap_fetch_bystring(regdb, tmp_ctx, tdbkey);
 949         if (data.dptr == NULL) {
 950                 err = WERR_BADFILE;
 951                 goto done;
 952         }
 953
 954         status = unmarshall_sec_desc(mem_ctx, (uint8 *)data.dptr, data.dsize,
 955                                      psecdesc);
 956
 957         if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
 958                 err = WERR_NOMEM;
 959         } else if (!NT_STATUS_IS_OK(status)) {
 960                 err = WERR_REG_CORRUPT;
 961         }
 962
 963 done:
 964         TALLOC_FREE(tmp_ctx);
 965         return err;
 966 }
 967
 968 static WERROR regdb_set_secdesc(const char *key,
 969                                 struct security_descriptor *secdesc)
 970 {
 971         TALLOC_CTX *mem_ctx = talloc_stackframe();
 972         char *tdbkey;
 973         WERROR err = WERR_NOMEM;
 974         TDB_DATA tdbdata;
 975         int tdb_ret;
 976
 977         tdbkey = talloc_asprintf(mem_ctx, "%s/%s", REG_SECDESC_PREFIX, key);
 978         if (tdbkey == NULL) {
 979                 goto done;
 980         }
 981         normalize_dbkey(tdbkey);
 982
 983         if (secdesc == NULL) {
 984                 /* assuming a delete */
 985                 tdb_ret = dbwrap_trans_delete(regdb,
 986                                               string_term_tdb_data(tdbkey));
 987                 if (tdb_ret == -1) {
 988                         err = ntstatus_to_werror(map_nt_error_from_unix(errno));
 989                 } else {
 990                         err = WERR_OK;
 991                 }
 992                 goto done;
 993         }
 994
 995         err = ntstatus_to_werror(marshall_sec_desc(mem_ctx, secdesc,
 996                                                    &tdbdata.dptr,
 997                                                    &tdbdata.dsize));
 998         if (!W_ERROR_IS_OK(err)) {
 999                 goto done;
1000         }
1001
1002         tdb_ret = dbwrap_trans_store(regdb, string_term_tdb_data(tdbkey),
1003                                      tdbdata, 0);
1004         if (tdb_ret == -1) {
1005                 err = ntstatus_to_werror(map_nt_error_from_unix(errno));
1006                 goto done;
1007         }
1008
1009  done:
1010         TALLOC_FREE(mem_ctx);
1011         return err;
1012 }
1013
1014 bool regdb_subkeys_need_update(REGSUBKEY_CTR *subkeys)
1015 {
1016         return (regdb_get_seqnum() != subkeys->seqnum);
1017 }
1018
1019 bool regdb_values_need_update(REGVAL_CTR *values)
1020 {
1021         return (regdb_get_seqnum() != values->seqnum);
1022 }
1023
1024 /*
1025  * Table of function pointers for default access
1026  */
1027
1028 REGISTRY_OPS regdb_ops = {
1029         .fetch_subkeys = regdb_fetch_keys,
1030         .fetch_values = regdb_fetch_values,
1031         .store_subkeys = regdb_store_keys,
1032         .store_values = regdb_store_values,
1033         .get_secdesc = regdb_get_secdesc,
1034         .set_secdesc = regdb_set_secdesc,
1035         .subkeys_need_update = regdb_subkeys_need_update,
1036         .values_need_update = regdb_values_need_update
1037 };