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