source3/registry/reg_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 tdb_wrap *tdb_reg = NULL;
  28 static int tdb_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         "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Perflib",
  48         "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Perflib\\009",
  49         "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Print\\Monitors",
  50         "HKLM\\SYSTEM\\CurrentControlSet\\Control\\ProductOptions",
  51         "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Terminal Server\\DefaultUserConfiguration",
  52         "HKLM\\SYSTEM\\CurrentControlSet\\Services\\TcpIp\\Parameters",
  53         "HKLM\\SYSTEM\\CurrentControlSet\\Services\\Netlogon\\Parameters",
  54         "HKU",
  55         "HKCR",
  56         "HKPD",
  57         "HKPT",
  58          NULL };
  59
  60 struct builtin_regkey_value {
  61         const char *path;
  62         const char *valuename;
  63         uint32 type;
  64         union {
  65                 const char *string;
  66                 uint32 dw_value;
  67         } data;
  68 };
  69
  70 static struct builtin_regkey_value builtin_registry_values[] = {
  71         { KEY_PRINTING_PORTS,
  72                 SAMBA_PRINTER_PORT_NAME, REG_SZ, { "" } },
  73         { KEY_PRINTING_2K,
  74                 "DefaultSpoolDirectory", REG_SZ, { "C:\\Windows\\System32\\Spool\\Printers" } },
  75         { KEY_EVENTLOG,
  76                 "DisplayName", REG_SZ, { "Event Log" } },
  77         { KEY_EVENTLOG,
  78                 "ErrorControl", REG_DWORD, { (char*)0x00000001 } },
  79         { NULL, NULL, 0, { NULL } }
  80 };
  81
  82 /***********************************************************************
  83  Open the registry data in the tdb
  84  ***********************************************************************/
  85
  86 static bool init_registry_data( void )
  87 {
  88         char *path = NULL;
  89         char *base = NULL;
  90         char *remaining = NULL;
  91         TALLOC_CTX *frame = NULL;
  92         char *keyname;
  93         char *subkeyname;
  94         REGSUBKEY_CTR *subkeys;
  95         REGVAL_CTR *values;
  96         int i;
  97         const char *p, *p2;
  98         UNISTR2 data;
  99
 100         /*
 101          * There are potentially quite a few store operations which are all
 102          * indiviually wrapped in tdb transactions. Wrapping them in a single
 103          * transaction gives just a single transaction_commit() to actually do
 104          * its fsync()s. See tdb/common/transaction.c for info about nested
 105          * transaction behaviour.
 106          */
 107
 108         if ( tdb_transaction_start( tdb_reg->tdb ) == -1 ) {
 109                 DEBUG(0, ("init_registry_data: tdb_transaction_start "
 110                           "failed\n"));
 111                 return false;
 112         }
 113
 114         /* loop over all of the predefined paths and add each component */
 115
 116         for ( i=0; builtin_registry_paths[i] != NULL; i++ ) {
 117
 118                 frame = talloc_stackframe();
 119
 120                 DEBUG(6,("init_registry_data: Adding [%s]\n", builtin_registry_paths[i]));
 121
 122                 path = talloc_strdup(talloc_tos(), builtin_registry_paths[i]);
 123                 base = talloc_strdup(talloc_tos(), "");
 124                 if (!path || !base) {
 125                         goto fail;
 126                 }
 127                 p = path;
 128
 129                 while (next_token_talloc(talloc_tos(), &p, &keyname, "\\")) {
 130
 131                         /* build up the registry path from the components */
 132
 133                         if (*base) {
 134                                 base = talloc_asprintf(talloc_tos(), "%s\\", base);
 135                                 if (!base) {
 136                                         goto fail;
 137                                 }
 138                         }
 139                         base = talloc_asprintf_append(base, "%s", keyname);
 140                         if (!base) {
 141                                 goto fail;
 142                         }
 143
 144                         /* get the immediate subkeyname (if we have one ) */
 145
 146                         subkeyname = talloc_strdup(talloc_tos(), "");
 147                         if (!subkeyname) {
 148                                 goto fail;
 149                         }
 150                         if (*p) {
 151                                 remaining = talloc_strdup(talloc_tos(), p);
 152                                 if (!remaining) {
 153                                         goto fail;
 154                                 }
 155                                 p2 = remaining;
 156
 157                                 if (!next_token_talloc(talloc_tos(), &p2,
 158                                                         &subkeyname, "\\")) {
 159                                         subkeyname = talloc_strdup(talloc_tos(),p2);
 160                                         if (!subkeyname) {
 161                                                 goto fail;
 162                                         }
 163                                 }
 164                         }
 165
 166                         DEBUG(10,("init_registry_data: Storing key [%s] with subkey [%s]\n",
 167                                 base, *subkeyname ? subkeyname : "NULL"));
 168
 169                         /* we don't really care if the lookup succeeds or not since
 170                            we are about to update the record.  We just want any
 171                            subkeys already present */
 172
 173                         if ( !(subkeys = TALLOC_ZERO_P(talloc_tos(), REGSUBKEY_CTR )) ) {
 174                                 DEBUG(0,("talloc() failure!\n"));
 175                                 goto fail;
 176                         }
 177
 178                         regdb_fetch_keys(base, subkeys);
 179                         if (*subkeyname) {
 180                                 regsubkey_ctr_addkey( subkeys, subkeyname);
 181                         }
 182                         if (!regdb_store_keys( base, subkeys)) {
 183                                 goto fail;
 184                         }
 185                 }
 186
 187                 TALLOC_FREE(frame);
 188         }
 189
 190         /* loop over all of the predefined values and add each component */
 191
 192         for (i=0; builtin_registry_values[i].path != NULL; i++) {
 193
 194                 if (!(values = TALLOC_ZERO_P(talloc_tos(), REGVAL_CTR))) {
 195                         goto fail;
 196                 }
 197
 198                 regdb_fetch_values( builtin_registry_values[i].path, values);
 199
 200                 /* preserve existing values across restarts.  Only add new ones */
 201
 202                 if (!regval_ctr_key_exists(values, builtin_registry_values[i].valuename)) {
 203                         switch(builtin_registry_values[i].type) {
 204                         case REG_DWORD:
 205                                 regval_ctr_addvalue( values,
 206                                                      builtin_registry_values[i].valuename,
 207                                                      REG_DWORD,
 208                                                      (char*)&builtin_registry_values[i].data.dw_value,
 209                                                      sizeof(uint32) );
 210                                 break;
 211
 212                         case REG_SZ:
 213                                 init_unistr2( &data, builtin_registry_values[i].data.string, UNI_STR_TERMINATE);
 214                                 regval_ctr_addvalue( values,
 215                                                      builtin_registry_values[i].valuename,
 216                                                      REG_SZ,
 217                                                      (char*)data.buffer,
 218                                                      data.uni_str_len*sizeof(uint16) );
 219                                 break;
 220
 221                         default:
 222                                 DEBUG(0,("init_registry_data: invalid value type in builtin_registry_values [%d]\n",
 223                                         builtin_registry_values[i].type));
 224                         }
 225                         regdb_store_values( builtin_registry_values[i].path, values );
 226                 }
 227                 TALLOC_FREE( values );
 228         }
 229
 230         TALLOC_FREE(frame);
 231
 232         if (tdb_transaction_commit( tdb_reg->tdb ) == -1) {
 233                 DEBUG(0, ("init_registry_data: Could not commit "
 234                           "transaction\n"));
 235                 return false;
 236         }
 237
 238         return true;
 239
 240  fail:
 241
 242         TALLOC_FREE(frame);
 243
 244         if (tdb_transaction_cancel( tdb_reg->tdb ) == -1) {
 245                 smb_panic("init_registry_data: tdb_transaction_cancel "
 246                           "failed\n");
 247         }
 248
 249         return false;
 250 }
 251
 252 /***********************************************************************
 253  Open the registry database
 254  ***********************************************************************/
 255
 256 bool regdb_init( void )
 257 {
 258         const char *vstring = "INFO/version";
 259         uint32 vers_id;
 260
 261         if ( tdb_reg )
 262                 return true;
 263
 264         if ( !(tdb_reg = tdb_wrap_open(NULL, state_path("registry.tdb"), 0, REG_TDB_FLAGS, O_RDWR, 0600)) )
 265         {
 266                 tdb_reg = tdb_wrap_open(NULL, state_path("registry.tdb"), 0, REG_TDB_FLAGS, O_RDWR|O_CREAT, 0600);
 267                 if ( !tdb_reg ) {
 268                         DEBUG(0,("regdb_init: Failed to open registry %s (%s)\n",
 269                                 state_path("registry.tdb"), strerror(errno) ));
 270                         return false;
 271                 }
 272
 273                 DEBUG(10,("regdb_init: Successfully created registry tdb\n"));
 274         }
 275
 276         tdb_refcount = 1;
 277
 278         vers_id = tdb_fetch_int32(tdb_reg->tdb, vstring);
 279
 280         if ( vers_id != REGVER_V1 ) {
 281                 /* any upgrade code here if needed */
 282                 DEBUG(10, ("regdb_init: got INFO/version = %d != %d\n",
 283                            vers_id, REGVER_V1));
 284         }
 285
 286         /* always setup the necessary keys and values */
 287
 288         if ( !init_registry_data() ) {
 289                 DEBUG(0,("regdb_init: Failed to initialize data in registry!\n"));
 290                 return false;
 291         }
 292
 293         return true;
 294 }
 295
 296 /***********************************************************************
 297  Open the registry.  Must already have been initialized by regdb_init()
 298  ***********************************************************************/
 299
 300 WERROR regdb_open( void )
 301 {
 302         WERROR result = WERR_OK;
 303
 304         if ( tdb_reg ) {
 305                 DEBUG(10,("regdb_open: incrementing refcount (%d)\n", tdb_refcount));
 306                 tdb_refcount++;
 307                 return WERR_OK;
 308         }
 309
 310         become_root();
 311
 312         tdb_reg = tdb_wrap_open(NULL, state_path("registry.tdb"), 0, REG_TDB_FLAGS, O_RDWR, 0600);
 313         if ( !tdb_reg ) {
 314                 result = ntstatus_to_werror( map_nt_error_from_unix( errno ) );
 315                 DEBUG(0,("regdb_open: Failed to open %s! (%s)\n",
 316                         state_path("registry.tdb"), strerror(errno) ));
 317         }
 318
 319         unbecome_root();
 320
 321         tdb_refcount = 1;
 322         DEBUG(10,("regdb_open: refcount reset (%d)\n", tdb_refcount));
 323
 324         return result;
 325 }
 326
 327 /***********************************************************************
 328  ***********************************************************************/
 329
 330 int regdb_close( void )
 331 {
 332         if (tdb_refcount == 0) {
 333                 return 0;
 334         }
 335
 336         tdb_refcount--;
 337
 338         DEBUG(10,("regdb_close: decrementing refcount (%d)\n", tdb_refcount));
 339
 340         if ( tdb_refcount > 0 )
 341                 return 0;
 342
 343         SMB_ASSERT( tdb_refcount >= 0 );
 344
 345         TALLOC_FREE(tdb_reg);
 346         return 0;
 347 }
 348
 349 /***********************************************************************
 350  return the tdb sequence number of the registry tdb.
 351  this is an indicator for the content of the registry
 352  having changed. it will change upon regdb_init, too, though.
 353  ***********************************************************************/
 354 int regdb_get_seqnum(void)
 355 {
 356         return tdb_get_seqnum(tdb_reg->tdb);
 357 }
 358
 359 /***********************************************************************
 360  Add subkey strings to the registry tdb under a defined key
 361  fmt is the same format as tdb_pack except this function only supports
 362  fstrings
 363  ***********************************************************************/
 364
 365 static bool regdb_store_keys_internal(const char *key, REGSUBKEY_CTR *ctr)
 366 {
 367         TDB_DATA dbuf;
 368         uint8 *buffer = NULL;
 369         int i = 0;
 370         uint32 len, buflen;
 371         bool ret = true;
 372         uint32 num_subkeys = regsubkey_ctr_numkeys(ctr);
 373         char *keyname = NULL;
 374         TALLOC_CTX *ctx = talloc_tos();
 375
 376         if (!key) {
 377                 return false;
 378         }
 379
 380         keyname = talloc_strdup(ctx, key);
 381         if (!keyname) {
 382                 return false;
 383         }
 384         keyname = normalize_reg_path(ctx, keyname);
 385
 386         /* allocate some initial memory */
 387
 388         if (!(buffer = (uint8 *)SMB_MALLOC(1024))) {
 389                 return false;
 390         }
 391         buflen = 1024;
 392         len = 0;
 393
 394         /* store the number of subkeys */
 395
 396         len += tdb_pack(buffer+len, buflen-len, "d", num_subkeys );
 397
 398         /* pack all the strings */
 399
 400         for (i=0; i<num_subkeys; i++) {
 401                 len += tdb_pack( buffer+len, buflen-len, "f", regsubkey_ctr_specific_key(ctr, i) );
 402                 if ( len > buflen ) {
 403                         /* allocate some extra space */
 404                         if ((buffer = (uint8 *)SMB_REALLOC( buffer, len*2 )) == NULL) {
 405                                 DEBUG(0,("regdb_store_keys: Failed to realloc memory of size [%d]\n", len*2));
 406                                 ret = false;
 407                                 goto done;
 408                         }
 409                         buflen = len*2;
 410
 411                         len = tdb_pack( buffer+len, buflen-len, "f", regsubkey_ctr_specific_key(ctr, i) );
 412                 }
 413         }
 414
 415         /* finally write out the data */
 416
 417         dbuf.dptr = buffer;
 418         dbuf.dsize = len;
 419         if ( tdb_store_bystring( tdb_reg->tdb, keyname, dbuf, TDB_REPLACE ) == -1) {
 420                 ret = false;
 421                 goto done;
 422         }
 423
 424 done:
 425         SAFE_FREE( buffer );
 426         return ret;
 427 }
 428
 429 /***********************************************************************
 430  Store the new subkey record and create any child key records that
 431  do not currently exist
 432  ***********************************************************************/
 433
 434 bool regdb_store_keys(const char *key, REGSUBKEY_CTR *ctr)
 435 {
 436         int num_subkeys, i;
 437         char *path = NULL;
 438         REGSUBKEY_CTR *subkeys = NULL, *old_subkeys = NULL;
 439         char *oldkeyname = NULL;
 440         TALLOC_CTX *ctx = talloc_tos();
 441
 442         /*
 443          * fetch a list of the old subkeys so we can determine if anything has
 444          * changed
 445          */
 446
 447         if (!(old_subkeys = TALLOC_ZERO_P(ctr, REGSUBKEY_CTR))) {
 448                 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 449                 return false;
 450         }
 451
 452         regdb_fetch_keys(key, old_subkeys);
 453
 454         if (ctr->num_subkeys == old_subkeys->num_subkeys) {
 455
 456                 for (i = 0; i<ctr->num_subkeys; i++) {
 457                         if (strcmp(ctr->subkeys[i],
 458                                    old_subkeys->subkeys[i]) != 0) {
 459                                 break;
 460                         }
 461                 }
 462                 if (i == ctr->num_subkeys) {
 463                         /*
 464                          * Nothing changed, no point to even start a tdb
 465                          * transaction
 466                          */
 467                         TALLOC_FREE(old_subkeys);
 468                         return true;
 469                 }
 470         }
 471
 472         if (tdb_transaction_start( tdb_reg->tdb ) == -1) {
 473                 DEBUG(0, ("regdb_store_keys: tdb_transaction_start failed\n"));
 474                 return false;
 475         }
 476
 477         /*
 478          * Re-fetch the old keys inside the transaction
 479          */
 480
 481         TALLOC_FREE(old_subkeys);
 482
 483         if (!(old_subkeys = TALLOC_ZERO_P(ctr, REGSUBKEY_CTR))) {
 484                 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 485                 goto fail;
 486         }
 487
 488         regdb_fetch_keys(key, old_subkeys);
 489
 490         /* store the subkey list for the parent */
 491
 492         if (!regdb_store_keys_internal(key, ctr) ) {
 493                 DEBUG(0,("regdb_store_keys: Failed to store new subkey list "
 494                          "for parent [%s]\n", key));
 495                 goto fail;
 496         }
 497
 498         /* now delete removed keys */
 499
 500         num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
 501         for (i=0; i<num_subkeys; i++) {
 502                 oldkeyname = regsubkey_ctr_specific_key(old_subkeys, i);
 503
 504                 if (regsubkey_ctr_key_exists(ctr, oldkeyname)) {
 505                         /*
 506                          * It's still around, don't delete
 507                          */
 508
 509                         continue;
 510                 }
 511
 512                 path = talloc_asprintf(ctx, "%s/%s", key, oldkeyname);
 513                 if (!path) {
 514                         goto fail;
 515                 }
 516                 path = normalize_reg_path(ctx, path);
 517                 if (!path) {
 518                         goto fail;
 519                 }
 520                 if (tdb_delete_bystring(tdb_reg->tdb, path) == -1) {
 521                         DEBUG(1, ("Deleting %s failed\n", path));
 522                         goto fail;
 523                 }
 524
 525                 TALLOC_FREE(path);
 526                 path = talloc_asprintf(ctx, "%s/%s/%s",
 527                                 REG_VALUE_PREFIX,
 528                                 key,
 529                                 oldkeyname );
 530                 if (!path) {
 531                         goto fail;
 532                 }
 533                 path = normalize_reg_path(ctx, path);
 534                 if (!path) {
 535                         goto fail;
 536                 }
 537
 538                 /*
 539                  * Ignore errors here, we might have no values around
 540                  */
 541                 tdb_delete_bystring( tdb_reg->tdb, path );
 542                 TALLOC_FREE(path);
 543         }
 544
 545         TALLOC_FREE(old_subkeys);
 546
 547         /* now create records for any subkeys that don't already exist */
 548
 549         num_subkeys = regsubkey_ctr_numkeys(ctr);
 550         for (i=0; i<num_subkeys; i++) {
 551                 path = talloc_asprintf(ctx, "%s/%s",
 552                                         key,
 553                                         regsubkey_ctr_specific_key(ctr, i));
 554                 if (!path) {
 555                         goto fail;
 556                 }
 557                 if (!(subkeys = TALLOC_ZERO_P(ctr, REGSUBKEY_CTR)) ) {
 558                         DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 559                         goto fail;
 560                 }
 561
 562                 if (regdb_fetch_keys( path, subkeys ) == -1) {
 563                         /* create a record with 0 subkeys */
 564                         if (!regdb_store_keys_internal(path, subkeys)) {
 565                                 DEBUG(0,("regdb_store_keys: Failed to store "
 566                                          "new record for key [%s]\n", path));
 567                                 goto fail;
 568                         }
 569                 }
 570
 571                 TALLOC_FREE(subkeys);
 572                 TALLOC_FREE(path);
 573         }
 574
 575         if (tdb_transaction_commit( tdb_reg->tdb ) == -1) {
 576                 DEBUG(0, ("regdb_store_keys: Could not commit transaction\n"));
 577                 return false;
 578         }
 579
 580         return true;
 581
 582  fail:
 583         TALLOC_FREE(old_subkeys);
 584         TALLOC_FREE(subkeys);
 585
 586         if (tdb_transaction_cancel(tdb_reg->tdb) == -1) {
 587                 smb_panic("regdb_store_keys: tdb_transaction_cancel failed\n");
 588         }
 589
 590         return false;
 591 }
 592
 593
 594 /***********************************************************************
 595  Retrieve an array of strings containing subkeys.  Memory should be
 596  released by the caller.
 597  ***********************************************************************/
 598
 599 int regdb_fetch_keys(const char *key, REGSUBKEY_CTR *ctr)
 600 {
 601         char *path = NULL;
 602         uint32 num_items;
 603         TDB_DATA dbuf;
 604         uint8 *buf;
 605         uint32 buflen, len;
 606         int i;
 607         fstring subkeyname;
 608         int ret = -1;
 609         TALLOC_CTX *frame = talloc_stackframe();
 610
 611         DEBUG(11,("regdb_fetch_keys: Enter key => [%s]\n", key ? key : "NULL"));
 612
 613         path = talloc_strdup(talloc_tos(), key);
 614         if (!path) {
 615                 goto fail;
 616         }
 617
 618         /* convert to key format */
 619         path = talloc_string_sub(talloc_tos(), path, "\\", "/");
 620         if (!path) {
 621                 goto fail;
 622         }
 623         strupper_m(path);
 624
 625         if (tdb_read_lock_bystring_with_timeout(tdb_reg->tdb, path, 10) == -1) {
 626                 return 0;
 627         }
 628
 629         dbuf = tdb_fetch_bystring(tdb_reg->tdb, path);
 630         ctr->seqnum = regdb_get_seqnum();
 631
 632         tdb_read_unlock_bystring(tdb_reg->tdb, path);
 633
 634
 635         buf = dbuf.dptr;
 636         buflen = dbuf.dsize;
 637
 638         if ( !buf ) {
 639                 DEBUG(5,("regdb_fetch_keys: tdb lookup failed to locate key [%s]\n", key));
 640                 goto fail;
 641         }
 642
 643         len = tdb_unpack( buf, buflen, "d", &num_items);
 644
 645         for (i=0; i<num_items; i++) {
 646                 len += tdb_unpack(buf+len, buflen-len, "f", subkeyname);
 647                 regsubkey_ctr_addkey(ctr, subkeyname);
 648         }
 649
 650         SAFE_FREE(dbuf.dptr);
 651
 652         DEBUG(11,("regdb_fetch_keys: Exit [%d] items\n", num_items));
 653
 654         ret = num_items;
 655  fail:
 656         TALLOC_FREE(frame);
 657         return ret;
 658 }
 659
 660 /****************************************************************************
 661  Unpack a list of registry values frem the TDB
 662  ***************************************************************************/
 663
 664 static int regdb_unpack_values(REGVAL_CTR *values, uint8 *buf, int buflen)
 665 {
 666         int             len = 0;
 667         uint32          type;
 668         fstring valuename;
 669         uint32          size;
 670         uint8           *data_p;
 671         uint32          num_values = 0;
 672         int             i;
 673
 674         /* loop and unpack the rest of the registry values */
 675
 676         len += tdb_unpack(buf+len, buflen-len, "d", &num_values);
 677
 678         for ( i=0; i<num_values; i++ ) {
 679                 /* unpack the next regval */
 680
 681                 type = REG_NONE;
 682                 size = 0;
 683                 data_p = NULL;
 684                 valuename[0] = '\0';
 685                 len += tdb_unpack(buf+len, buflen-len, "fdB",
 686                                   valuename,
 687                                   &type,
 688                                   &size,
 689                                   &data_p);
 690
 691                 /* add the new value. Paranoid protective code -- make sure data_p is valid */
 692
 693                 if (*valuename && size && data_p) {
 694                         regval_ctr_addvalue(values, valuename, type,
 695                                         (const char *)data_p, size);
 696                 }
 697                 SAFE_FREE(data_p); /* 'B' option to tdb_unpack does a malloc() */
 698
 699                 DEBUG(8,("specific: [%s], len: %d\n", valuename, size));
 700         }
 701
 702         return len;
 703 }
 704
 705 /****************************************************************************
 706  Pack all values in all printer keys
 707  ***************************************************************************/
 708
 709 static int regdb_pack_values(REGVAL_CTR *values, uint8 *buf, int buflen)
 710 {
 711         int             len = 0;
 712         int             i;
 713         REGISTRY_VALUE  *val;
 714         int             num_values;
 715
 716         if ( !values )
 717                 return 0;
 718
 719         num_values = regval_ctr_numvals( values );
 720
 721         /* pack the number of values first */
 722
 723         len += tdb_pack( buf+len, buflen-len, "d", num_values );
 724
 725         /* loop over all values */
 726
 727         for ( i=0; i<num_values; i++ ) {
 728                 val = regval_ctr_specific_value( values, i );
 729                 len += tdb_pack(buf+len, buflen-len, "fdB",
 730                                 regval_name(val),
 731                                 regval_type(val),
 732                                 regval_size(val),
 733                                 regval_data_p(val) );
 734         }
 735
 736         return len;
 737 }
 738
 739 /***********************************************************************
 740  Retrieve an array of strings containing subkeys.  Memory should be
 741  released by the caller.
 742  ***********************************************************************/
 743
 744 int regdb_fetch_values( const char* key, REGVAL_CTR *values )
 745 {
 746         TDB_DATA data;
 747         char *keystr = NULL;
 748         TALLOC_CTX *ctx = talloc_tos();
 749
 750         DEBUG(10,("regdb_fetch_values: Looking for value of key [%s] \n", key));
 751
 752         keystr = talloc_asprintf(ctx, "%s/%s", REG_VALUE_PREFIX, key);
 753         if (!keystr) {
 754                 return 0;
 755         }
 756         keystr = normalize_reg_path(ctx, keystr);
 757         if (!keystr) {
 758                 return 0;
 759         }
 760
 761         if (tdb_read_lock_bystring_with_timeout(tdb_reg->tdb, keystr, 10) == -1) {
 762                 return 0;
 763         }
 764
 765         data = tdb_fetch_bystring(tdb_reg->tdb, keystr);
 766         values->seqnum = regdb_get_seqnum();
 767
 768         tdb_read_unlock_bystring(tdb_reg->tdb, keystr);
 769
 770         if (!data.dptr) {
 771                 /* all keys have zero values by default */
 772                 return 0;
 773         }
 774
 775         regdb_unpack_values(values, data.dptr, data.dsize);
 776
 777         SAFE_FREE(data.dptr);
 778         return regval_ctr_numvals(values);
 779 }
 780
 781 bool regdb_store_values( const char *key, REGVAL_CTR *values )
 782 {
 783         TDB_DATA old_data, data;
 784         char *keystr = NULL;
 785         TALLOC_CTX *ctx = talloc_tos();
 786         int len, ret;
 787
 788         DEBUG(10,("regdb_store_values: Looking for value of key [%s] \n", key));
 789
 790         ZERO_STRUCT(data);
 791
 792         len = regdb_pack_values(values, data.dptr, data.dsize);
 793         if (len <= 0) {
 794                 DEBUG(0,("regdb_store_values: unable to pack values. len <= 0\n"));
 795                 return false;
 796         }
 797
 798         data.dptr = SMB_MALLOC_ARRAY( uint8, len );
 799         data.dsize = len;
 800
 801         len = regdb_pack_values(values, data.dptr, data.dsize);
 802
 803         SMB_ASSERT( len == data.dsize );
 804
 805         keystr = talloc_asprintf(ctx, "%s/%s", REG_VALUE_PREFIX, key );
 806         if (!keystr) {
 807                 SAFE_FREE(data.dptr);
 808                 return false;
 809         }
 810         keystr = normalize_reg_path(ctx, keystr);
 811         if (!keystr) {
 812                 SAFE_FREE(data.dptr);
 813                 return false;
 814         }
 815
 816         old_data = tdb_fetch_bystring(tdb_reg->tdb, keystr);
 817
 818         if ((old_data.dptr != NULL)
 819             && (old_data.dsize == data.dsize)
 820             && (memcmp(old_data.dptr, data.dptr, data.dsize) == 0)) {
 821                 SAFE_FREE(old_data.dptr);
 822                 SAFE_FREE(data.dptr);
 823                 return true;
 824         }
 825
 826         ret = tdb_trans_store_bystring(tdb_reg->tdb, keystr, data, TDB_REPLACE);
 827
 828         SAFE_FREE( old_data.dptr );
 829         SAFE_FREE( data.dptr );
 830
 831         return ret != -1 ;
 832 }
 833
 834 static WERROR regdb_get_secdesc(TALLOC_CTX *mem_ctx, const char *key,
 835                                 struct security_descriptor **psecdesc)
 836 {
 837         char *tdbkey;
 838         TDB_DATA data;
 839         NTSTATUS status;
 840
 841         DEBUG(10, ("regdb_get_secdesc: Getting secdesc of key [%s]\n", key));
 842
 843         if (asprintf(&tdbkey, "%s/%s", REG_SECDESC_PREFIX, key) == -1) {
 844                 return WERR_NOMEM;
 845         }
 846         normalize_dbkey(tdbkey);
 847
 848         data = tdb_fetch_bystring(tdb_reg->tdb, tdbkey);
 849         SAFE_FREE(tdbkey);
 850
 851         if (data.dptr == NULL) {
 852                 return WERR_BADFILE;
 853         }
 854
 855         status = unmarshall_sec_desc(mem_ctx, (uint8 *)data.dptr, data.dsize,
 856                                      psecdesc);
 857
 858         SAFE_FREE(data.dptr);
 859
 860         if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
 861                 return WERR_NOMEM;
 862         }
 863
 864         if (!NT_STATUS_IS_OK(status)) {
 865                 return WERR_REG_CORRUPT;
 866         }
 867
 868         return WERR_OK;
 869 }
 870
 871 static WERROR regdb_set_secdesc(const char *key,
 872                                 struct security_descriptor *secdesc)
 873 {
 874         prs_struct ps;
 875         TALLOC_CTX *mem_ctx;
 876         char *tdbkey;
 877         WERROR err = WERR_NOMEM;
 878         TDB_DATA tdbdata;
 879
 880         if (!(mem_ctx = talloc_init("regdb_set_secdesc"))) {
 881                 return WERR_NOMEM;
 882         }
 883
 884         ZERO_STRUCT(ps);
 885
 886         if (!(tdbkey = talloc_asprintf(mem_ctx, "%s/%s", REG_SECDESC_PREFIX,
 887                                        key))) {
 888                 goto done;
 889         }
 890         normalize_dbkey(tdbkey);
 891
 892         if (secdesc == NULL) {
 893                 /* assuming a delete */
 894                 int tdb_ret;
 895
 896                 tdb_ret = tdb_trans_delete(tdb_reg->tdb,
 897                                            string_term_tdb_data(tdbkey));
 898                 if (tdb_ret == -1) {
 899                         err = ntstatus_to_werror(map_nt_error_from_unix(errno));
 900                 } else {
 901                         err = WERR_OK;
 902                 }
 903
 904                 goto done;
 905         }
 906
 907         err = ntstatus_to_werror(marshall_sec_desc(mem_ctx, secdesc,
 908                                                    &tdbdata.dptr,
 909                                                    &tdbdata.dsize));
 910         if (!W_ERROR_IS_OK(err)) {
 911                 goto done;
 912         }
 913
 914         if (tdb_trans_store_bystring(tdb_reg->tdb, tdbkey, tdbdata, 0) == -1) {
 915                 err = ntstatus_to_werror(map_nt_error_from_unix(errno));
 916                 goto done;
 917         }
 918
 919  done:
 920         prs_mem_free(&ps);
 921         TALLOC_FREE(mem_ctx);
 922         return err;
 923 }
 924
 925 bool regdb_subkeys_need_update(REGSUBKEY_CTR *subkeys)
 926 {
 927         return (regdb_get_seqnum() != subkeys->seqnum);
 928 }
 929
 930 bool regdb_values_need_update(REGVAL_CTR *values)
 931 {
 932         return (regdb_get_seqnum() != values->seqnum);
 933 }
 934
 935 /*
 936  * Table of function pointers for default access
 937  */
 938
 939 REGISTRY_OPS regdb_ops = {
 940         regdb_fetch_keys,
 941         regdb_fetch_values,
 942         regdb_store_keys,
 943         regdb_store_values,
 944         NULL,
 945         regdb_get_secdesc,
 946         regdb_set_secdesc,
 947         regdb_subkeys_need_update,
 948         regdb_values_need_update
 949 };