source3/registry/regfio.c

   1 /*
   2  * Unix SMB/CIFS implementation.
   3  * Windows NT registry I/O library
   4  * Copyright (c) Gerald (Jerry) Carter               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 #include "includes.h"
  21 #include "regfio.h"
  22
  23 #undef DBGC_CLASS
  24 #define DBGC_CLASS DBGC_REGISTRY
  25
  26 /*******************************************************************
  27  *
  28  * TODO : Right now this code basically ignores classnames.
  29  *
  30  ******************************************************************/
  31
  32
  33 /*******************************************************************
  34 *******************************************************************/
  35
  36 static int write_block( REGF_FILE *file, prs_struct *ps, uint32 offset )
  37 {
  38         int bytes_written, returned;
  39         char *buffer = prs_data_p( ps );
  40         uint32 buffer_size = prs_data_size( ps );
  41         SMB_STRUCT_STAT sbuf;
  42
  43         if ( file->fd == -1 )
  44                 return -1;
  45
  46         /* check for end of file */
  47
  48         if ( sys_fstat( file->fd, &sbuf ) ) {
  49                 DEBUG(0,("write_block: stat() failed! (%s)\n", strerror(errno)));
  50                 return -1;
  51         }
  52
  53         if ( lseek( file->fd, offset, SEEK_SET ) == -1 ) {
  54                 DEBUG(0,("write_block: lseek() failed! (%s)\n", strerror(errno) ));
  55                 return -1;
  56         }
  57
  58         bytes_written = returned = 0;
  59         while ( bytes_written < buffer_size ) {
  60                 if ( (returned = write( file->fd, buffer+bytes_written, buffer_size-bytes_written )) == -1 ) {
  61                         DEBUG(0,("write_block: write() failed! (%s)\n", strerror(errno) ));
  62                         return False;
  63                 }
  64
  65                 bytes_written += returned;
  66         }
  67
  68         return bytes_written;
  69 }
  70
  71 /*******************************************************************
  72 *******************************************************************/
  73
  74 static int read_block( REGF_FILE *file, prs_struct *ps, uint32 file_offset, uint32 block_size )
  75 {
  76         int bytes_read, returned;
  77         char *buffer;
  78         SMB_STRUCT_STAT sbuf;
  79
  80         /* check for end of file */
  81
  82         if ( sys_fstat( file->fd, &sbuf ) ) {
  83                 DEBUG(0,("read_block: stat() failed! (%s)\n", strerror(errno)));
  84                 return -1;
  85         }
  86
  87         if ( (size_t)file_offset >= sbuf.st_size )
  88                 return -1;
  89
  90         /* if block_size == 0, we are parsing HBIN records and need
  91            to read some of the header to get the block_size from there */
  92
  93         if ( block_size == 0 ) {
  94                 char hdr[0x20];
  95
  96                 if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
  97                         DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));
  98                         return -1;
  99                 }
 100
 101                 returned = read( file->fd, hdr, 0x20 );
 102                 if ( (returned == -1) || (returned < 0x20) ) {
 103                         DEBUG(0,("read_block: failed to read in HBIN header. Is the file corrupt?\n"));
 104                         return -1;
 105                 }
 106
 107                 /* make sure this is an hbin header */
 108
 109                 if ( strncmp( hdr, "hbin", HBIN_HDR_SIZE ) != 0 ) {
 110                         DEBUG(0,("read_block: invalid block header!\n"));
 111                         return -1;
 112                 }
 113
 114                 block_size = IVAL( hdr, 0x08 );
 115         }
 116
 117         DEBUG(10,("read_block: block_size == 0x%x\n", block_size ));
 118
 119         /* set the offset, initialize the buffer, and read the block from disk */
 120
 121         if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
 122                 DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));
 123                 return -1;
 124         }
 125
 126         if (!prs_init( ps, block_size, file->mem_ctx, UNMARSHALL )) {
 127                 DEBUG(0,("read_block: prs_init() failed! (%s)\n", strerror(errno) ));
 128                 return -1;
 129         }
 130         buffer = prs_data_p( ps );
 131         bytes_read = returned = 0;
 132
 133         while ( bytes_read < block_size ) {
 134                 if ( (returned = read( file->fd, buffer+bytes_read, block_size-bytes_read )) == -1 ) {
 135                         DEBUG(0,("read_block: read() failed (%s)\n", strerror(errno) ));
 136                         return False;
 137                 }
 138                 if ( (returned == 0) && (bytes_read < block_size) ) {
 139                         DEBUG(0,("read_block: not a vald registry file ?\n" ));
 140                         return False;
 141                 }
 142
 143                 bytes_read += returned;
 144         }
 145
 146         return bytes_read;
 147 }
 148
 149 /*******************************************************************
 150 *******************************************************************/
 151
 152 static bool write_hbin_block( REGF_FILE *file, REGF_HBIN *hbin )
 153 {
 154         if ( !hbin->dirty )
 155                 return True;
 156
 157         /* write free space record if any is available */
 158
 159         if ( hbin->free_off != REGF_OFFSET_NONE ) {
 160                 uint32 header = 0xffffffff;
 161
 162                 if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32) ) )
 163                         return False;
 164                 if ( !prs_uint32( "free_size", &hbin->ps, 0, &hbin->free_size ) )
 165                         return False;
 166                 if ( !prs_uint32( "free_header", &hbin->ps, 0, &header ) )
 167                         return False;
 168         }
 169
 170         hbin->dirty = (write_block( file, &hbin->ps, hbin->file_off ) != -1);
 171
 172         return hbin->dirty;
 173 }
 174
 175 /*******************************************************************
 176 *******************************************************************/
 177
 178 static bool hbin_block_close( REGF_FILE *file, REGF_HBIN *hbin )
 179 {
 180         REGF_HBIN *p;
 181
 182         /* remove the block from the open list and flush it to disk */
 183
 184         for ( p=file->block_list; p && p!=hbin; p=p->next )
 185                 ;;
 186
 187         if ( p == hbin ) {
 188                 DLIST_REMOVE( file->block_list, hbin );
 189         }
 190         else
 191                 DEBUG(0,("hbin_block_close: block not in open list!\n"));
 192
 193         if ( !write_hbin_block( file, hbin ) )
 194                 return False;
 195
 196         return True;
 197 }
 198
 199 /*******************************************************************
 200 *******************************************************************/
 201
 202 static bool prs_regf_block( const char *desc, prs_struct *ps, int depth, REGF_FILE *file )
 203 {
 204         prs_debug(ps, depth, desc, "prs_regf_block");
 205         depth++;
 206
 207         if ( !prs_uint8s( True, "header", ps, depth, (uint8*)file->header, sizeof( file->header )) )
 208                 return False;
 209
 210         /* yes, these values are always identical so store them only once */
 211
 212         if ( !prs_uint32( "unknown1", ps, depth, &file->unknown1 ))
 213                 return False;
 214         if ( !prs_uint32( "unknown1 (again)", ps, depth, &file->unknown1 ))
 215                 return False;
 216
 217         /* get the modtime */
 218
 219         if ( !prs_set_offset( ps, 0x0c ) )
 220                 return False;
 221         if ( !smb_io_time( "modtime", &file->mtime, ps, depth ) )
 222                 return False;
 223
 224         /* constants */
 225
 226         if ( !prs_uint32( "unknown2", ps, depth, &file->unknown2 ))
 227                 return False;
 228         if ( !prs_uint32( "unknown3", ps, depth, &file->unknown3 ))
 229                 return False;
 230         if ( !prs_uint32( "unknown4", ps, depth, &file->unknown4 ))
 231                 return False;
 232         if ( !prs_uint32( "unknown5", ps, depth, &file->unknown5 ))
 233                 return False;
 234
 235         /* get file offsets */
 236
 237         if ( !prs_set_offset( ps, 0x24 ) )
 238                 return False;
 239         if ( !prs_uint32( "data_offset", ps, depth, &file->data_offset ))
 240                 return False;
 241         if ( !prs_uint32( "last_block", ps, depth, &file->last_block ))
 242                 return False;
 243
 244         /* one more constant */
 245
 246         if ( !prs_uint32( "unknown6", ps, depth, &file->unknown6 ))
 247                 return False;
 248
 249         /* get the checksum */
 250
 251         if ( !prs_set_offset( ps, 0x01fc ) )
 252                 return False;
 253         if ( !prs_uint32( "checksum", ps, depth, &file->checksum ))
 254                 return False;
 255
 256         return True;
 257 }
 258
 259 /*******************************************************************
 260 *******************************************************************/
 261
 262 static bool prs_hbin_block( const char *desc, prs_struct *ps, int depth, REGF_HBIN *hbin )
 263 {
 264         uint32 block_size2;
 265
 266         prs_debug(ps, depth, desc, "prs_regf_block");
 267         depth++;
 268
 269         if ( !prs_uint8s( True, "header", ps, depth, (uint8*)hbin->header, sizeof( hbin->header )) )
 270                 return False;
 271
 272         if ( !prs_uint32( "first_hbin_off", ps, depth, &hbin->first_hbin_off ))
 273                 return False;
 274
 275         /* The dosreg.cpp comments say that the block size is at 0x1c.
 276            According to a WINXP NTUSER.dat file, this is wrong.  The block_size
 277            is at 0x08 */
 278
 279         if ( !prs_uint32( "block_size", ps, depth, &hbin->block_size ))
 280                 return False;
 281
 282         block_size2 = hbin->block_size;
 283         prs_set_offset( ps, 0x1c );
 284         if ( !prs_uint32( "block_size2", ps, depth, &block_size2 ))
 285                 return False;
 286
 287         if ( MARSHALLING(ps) )
 288                 hbin->dirty = True;
 289
 290
 291         return True;
 292 }
 293
 294 /*******************************************************************
 295 *******************************************************************/
 296
 297 static bool prs_nk_rec( const char *desc, prs_struct *ps, int depth, REGF_NK_REC *nk )
 298 {
 299         uint16 class_length, name_length;
 300         uint32 start;
 301         uint32 data_size, start_off, end_off;
 302         uint32 unknown_off = REGF_OFFSET_NONE;
 303
 304         nk->hbin_off = prs_offset( ps );
 305         start = nk->hbin_off;
 306
 307         prs_debug(ps, depth, desc, "prs_nk_rec");
 308         depth++;
 309
 310         /* back up and get the data_size */
 311
 312         if ( !prs_set_offset( ps, prs_offset(ps)-sizeof(uint32)) )
 313                 return False;
 314         start_off = prs_offset( ps );
 315         if ( !prs_uint32( "rec_size", ps, depth, &nk->rec_size ))
 316                 return False;
 317
 318         if ( !prs_uint8s( True, "header", ps, depth, (uint8*)nk->header, sizeof( nk->header )) )
 319                 return False;
 320
 321         if ( !prs_uint16( "key_type", ps, depth, &nk->key_type ))
 322                 return False;
 323         if ( !smb_io_time( "mtime", &nk->mtime, ps, depth ))
 324                 return False;
 325
 326         if ( !prs_set_offset( ps, start+0x0010 ) )
 327                 return False;
 328         if ( !prs_uint32( "parent_off", ps, depth, &nk->parent_off ))
 329                 return False;
 330         if ( !prs_uint32( "num_subkeys", ps, depth, &nk->num_subkeys ))
 331                 return False;
 332
 333         if ( !prs_set_offset( ps, start+0x001c ) )
 334                 return False;
 335         if ( !prs_uint32( "subkeys_off", ps, depth, &nk->subkeys_off ))
 336                 return False;
 337         if ( !prs_uint32( "unknown_off", ps, depth, &unknown_off) )
 338                 return False;
 339
 340         if ( !prs_set_offset( ps, start+0x0024 ) )
 341                 return False;
 342         if ( !prs_uint32( "num_values", ps, depth, &nk->num_values ))
 343                 return False;
 344         if ( !prs_uint32( "values_off", ps, depth, &nk->values_off ))
 345                 return False;
 346         if ( !prs_uint32( "sk_off", ps, depth, &nk->sk_off ))
 347                 return False;
 348         if ( !prs_uint32( "classname_off", ps, depth, &nk->classname_off ))
 349                 return False;
 350
 351         if ( !prs_uint32( "max_bytes_subkeyname", ps, depth, &nk->max_bytes_subkeyname))
 352                 return False;
 353         if ( !prs_uint32( "max_bytes_subkeyclassname", ps, depth, &nk->max_bytes_subkeyclassname))
 354                 return False;
 355         if ( !prs_uint32( "max_bytes_valuename", ps, depth, &nk->max_bytes_valuename))
 356                 return False;
 357         if ( !prs_uint32( "max_bytes_value", ps, depth, &nk->max_bytes_value))
 358                 return False;
 359         if ( !prs_uint32( "unknown index", ps, depth, &nk->unk_index))
 360                 return False;
 361
 362         name_length = nk->keyname ? strlen(nk->keyname) : 0 ;
 363         class_length = nk->classname ? strlen(nk->classname) : 0 ;
 364         if ( !prs_uint16( "name_length", ps, depth, &name_length ))
 365                 return False;
 366         if ( !prs_uint16( "class_length", ps, depth, &class_length ))
 367                 return False;
 368
 369         if ( class_length ) {
 370                 ;;
 371         }
 372
 373         if ( name_length ) {
 374                 if ( UNMARSHALLING(ps) ) {
 375                         if ( !(nk->keyname = PRS_ALLOC_MEM( ps, char, name_length+1 )) )
 376                                 return False;
 377                 }
 378
 379                 if ( !prs_uint8s( True, "name", ps, depth, (uint8*)nk->keyname, name_length) )
 380                         return False;
 381
 382                 if ( UNMARSHALLING(ps) )
 383                         nk->keyname[name_length] = '\0';
 384         }
 385
 386         end_off = prs_offset( ps );
 387
 388         /* data_size must be divisible by 8 and large enough to hold the original record */
 389
 390         data_size = ((start_off - end_off) & 0xfffffff8 );
 391         if ( data_size > nk->rec_size )
 392                 DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, nk->rec_size));
 393
 394         if ( MARSHALLING(ps) )
 395                 nk->hbin->dirty = True;
 396
 397         return True;
 398 }
 399
 400 /*******************************************************************
 401 *******************************************************************/
 402
 403 static uint32 regf_block_checksum( prs_struct *ps )
 404 {
 405         char *buffer = prs_data_p( ps );
 406         uint32 checksum, x;
 407         int i;
 408
 409         /* XOR of all bytes 0x0000 - 0x01FB */
 410
 411         checksum = x = 0;
 412
 413         for ( i=0; i<0x01FB; i+=4 ) {
 414                 x = IVAL(buffer, i );
 415                 checksum ^= x;
 416         }
 417
 418         return checksum;
 419 }
 420
 421 /*******************************************************************
 422 *******************************************************************/
 423
 424 static bool read_regf_block( REGF_FILE *file )
 425 {
 426         prs_struct ps;
 427         uint32 checksum;
 428
 429         /* grab the first block from the file */
 430
 431         if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) == -1 )
 432                 return False;
 433
 434         /* parse the block and verify the checksum */
 435
 436         if ( !prs_regf_block( "regf_header", &ps, 0, file ) )
 437                 return False;
 438
 439         checksum = regf_block_checksum( &ps );
 440
 441         prs_mem_free( &ps );
 442
 443         if ( file->checksum !=  checksum ) {
 444                 DEBUG(0,("read_regf_block: invalid checksum\n" ));
 445                 return False;
 446         }
 447
 448         return True;
 449 }
 450
 451 /*******************************************************************
 452 *******************************************************************/
 453
 454 static REGF_HBIN* read_hbin_block( REGF_FILE *file, off_t offset )
 455 {
 456         REGF_HBIN *hbin;
 457         uint32 record_size, curr_off, block_size, header;
 458
 459         if ( !(hbin = TALLOC_ZERO_P(file->mem_ctx, REGF_HBIN)) )
 460                 return NULL;
 461         hbin->file_off = offset;
 462         hbin->free_off = -1;
 463
 464         if ( read_block( file, &hbin->ps, offset, 0 ) == -1 )
 465                 return NULL;
 466
 467         if ( !prs_hbin_block( "hbin", &hbin->ps, 0, hbin ) )
 468                 return NULL;
 469
 470         /* this should be the same thing as hbin->block_size but just in case */
 471
 472         block_size = prs_data_size( &hbin->ps );
 473
 474         /* Find the available free space offset.  Always at the end,
 475            so walk the record list and stop when you get to the end.
 476            The end is defined by a record header of 0xffffffff.  The
 477            previous 4 bytes contains the amount of free space remaining
 478            in the hbin block. */
 479
 480         /* remember that the record_size is in the 4 bytes preceeding the record itself */
 481
 482         if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE-sizeof(uint32) ) )
 483                 return False;
 484
 485         record_size = 0;
 486         header = 0;
 487         curr_off = prs_offset( &hbin->ps );
 488         while ( header != 0xffffffff ) {
 489                 /* not done yet so reset the current offset to the
 490                    next record_size field */
 491
 492                 curr_off = curr_off+record_size;
 493
 494                 /* for some reason the record_size of the last record in
 495                    an hbin block can extend past the end of the block
 496                    even though the record fits within the remaining
 497                    space....aaarrrgggghhhhhh */
 498
 499                 if ( curr_off >= block_size ) {
 500                         record_size = -1;
 501                         curr_off = -1;
 502                         break;
 503                 }
 504
 505                 if ( !prs_set_offset( &hbin->ps, curr_off) )
 506                         return False;
 507
 508                 if ( !prs_uint32( "rec_size", &hbin->ps, 0, &record_size ) )
 509                         return False;
 510                 if ( !prs_uint32( "header", &hbin->ps, 0, &header ) )
 511                         return False;
 512
 513                 SMB_ASSERT( record_size != 0 );
 514
 515                 if ( record_size & 0x80000000 ) {
 516                         /* absolute_value(record_size) */
 517                         record_size = (record_size ^ 0xffffffff) + 1;
 518                 }
 519         }
 520
 521         /* save the free space offset */
 522
 523         if ( header == 0xffffffff ) {
 524
 525                 /* account for the fact that the curr_off is 4 bytes behind the actual
 526                    record header */
 527
 528                 hbin->free_off = curr_off + sizeof(uint32);
 529                 hbin->free_size = record_size;
 530         }
 531
 532         DEBUG(10,("read_hbin_block: free space offset == 0x%x\n", hbin->free_off));
 533
 534         if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE )  )
 535                 return False;
 536
 537         return hbin;
 538 }
 539
 540 /*******************************************************************
 541  Input a random offset and receive the corresponding HBIN
 542  block for it
 543 *******************************************************************/
 544
 545 static bool hbin_contains_offset( REGF_HBIN *hbin, uint32 offset )
 546 {
 547         if ( !hbin )
 548                 return False;
 549
 550         if ( (offset > hbin->first_hbin_off) && (offset < (hbin->first_hbin_off+hbin->block_size)) )
 551                 return True;
 552
 553         return False;
 554 }
 555
 556 /*******************************************************************
 557  Input a random offset and receive the corresponding HBIN
 558  block for it
 559 *******************************************************************/
 560
 561 static REGF_HBIN* lookup_hbin_block( REGF_FILE *file, uint32 offset )
 562 {
 563         REGF_HBIN *hbin = NULL;
 564         uint32 block_off;
 565
 566         /* start with the open list */
 567
 568         for ( hbin=file->block_list; hbin; hbin=hbin->next ) {
 569                 DEBUG(10,("lookup_hbin_block: address = 0x%x [0x%lx]\n", hbin->file_off, (unsigned long)hbin ));
 570                 if ( hbin_contains_offset( hbin, offset ) )
 571                         return hbin;
 572         }
 573
 574         if ( !hbin ) {
 575                 /* start at the beginning */
 576
 577                 block_off = REGF_BLOCKSIZE;
 578                 do {
 579                         /* cleanup before the next round */
 580                         if ( hbin )
 581                                 prs_mem_free( &hbin->ps );
 582
 583                         hbin = read_hbin_block( file, block_off );
 584
 585                         if ( hbin )
 586                                 block_off = hbin->file_off + hbin->block_size;
 587
 588                 } while ( hbin && !hbin_contains_offset( hbin, offset ) );
 589         }
 590
 591         if ( hbin )
 592                 DLIST_ADD( file->block_list, hbin );
 593
 594         return hbin;
 595 }
 596
 597 /*******************************************************************
 598 *******************************************************************/
 599
 600 static bool prs_hash_rec( const char *desc, prs_struct *ps, int depth, REGF_HASH_REC *hash )
 601 {
 602         prs_debug(ps, depth, desc, "prs_hash_rec");
 603         depth++;
 604
 605         if ( !prs_uint32( "nk_off", ps, depth, &hash->nk_off ))
 606                 return False;
 607         if ( !prs_uint8s( True, "keycheck", ps, depth, hash->keycheck, sizeof( hash->keycheck )) )
 608                 return False;
 609
 610         return True;
 611 }
 612
 613 /*******************************************************************
 614 *******************************************************************/
 615
 616 static bool hbin_prs_lf_records( const char *desc, REGF_HBIN *hbin, int depth, REGF_NK_REC *nk )
 617 {
 618         int i;
 619         REGF_LF_REC *lf = &nk->subkeys;
 620         uint32 data_size, start_off, end_off;
 621
 622         prs_debug(&hbin->ps, depth, desc, "prs_lf_records");
 623         depth++;
 624
 625         /* check if we have anything to do first */
 626
 627         if ( nk->num_subkeys == 0 )
 628                 return True;
 629
 630         /* move to the LF record */
 631
 632         if ( !prs_set_offset( &hbin->ps, nk->subkeys_off + HBIN_HDR_SIZE - hbin->first_hbin_off ) )
 633                 return False;
 634
 635         /* backup and get the data_size */
 636
 637         if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
 638                 return False;
 639         start_off = prs_offset( &hbin->ps );
 640         if ( !prs_uint32( "rec_size", &hbin->ps, depth, &lf->rec_size ))
 641                 return False;
 642
 643         if ( !prs_uint8s( True, "header", &hbin->ps, depth, (uint8*)lf->header, sizeof( lf->header )) )
 644                 return False;
 645
 646         if ( !prs_uint16( "num_keys", &hbin->ps, depth, &lf->num_keys))
 647                 return False;
 648
 649         if ( UNMARSHALLING(&hbin->ps) ) {
 650                 if (lf->num_keys) {
 651                         if ( !(lf->hashes = PRS_ALLOC_MEM( &hbin->ps, REGF_HASH_REC, lf->num_keys )) )
 652                                 return False;
 653                 } else {
 654                         lf->hashes = NULL;
 655                 }
 656         }
 657
 658         for ( i=0; i<lf->num_keys; i++ ) {
 659                 if ( !prs_hash_rec( "hash_rec", &hbin->ps, depth, &lf->hashes[i] ) )
 660                         return False;
 661         }
 662
 663         end_off = prs_offset( &hbin->ps );
 664
 665         /* data_size must be divisible by 8 and large enough to hold the original record */
 666
 667         data_size = ((start_off - end_off) & 0xfffffff8 );
 668         if ( data_size > lf->rec_size )
 669                 DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, lf->rec_size));
 670
 671         if ( MARSHALLING(&hbin->ps) )
 672                 hbin->dirty = True;
 673
 674         return True;
 675 }
 676
 677 /*******************************************************************
 678 *******************************************************************/
 679
 680 static bool hbin_prs_sk_rec( const char *desc, REGF_HBIN *hbin, int depth, REGF_SK_REC *sk )
 681 {
 682         prs_struct *ps = &hbin->ps;
 683         uint16 tag = 0xFFFF;
 684         uint32 data_size, start_off, end_off;
 685
 686
 687         prs_debug(ps, depth, desc, "hbin_prs_sk_rec");
 688         depth++;
 689
 690         if ( !prs_set_offset( &hbin->ps, sk->sk_off + HBIN_HDR_SIZE - hbin->first_hbin_off ) )
 691                 return False;
 692
 693         /* backup and get the data_size */
 694
 695         if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
 696                 return False;
 697         start_off = prs_offset( &hbin->ps );
 698         if ( !prs_uint32( "rec_size", &hbin->ps, depth, &sk->rec_size ))
 699                 return False;
 700
 701         if ( !prs_uint8s( True, "header", ps, depth, (uint8*)sk->header, sizeof( sk->header )) )
 702                 return False;
 703         if ( !prs_uint16( "tag", ps, depth, &tag))
 704                 return False;
 705
 706         if ( !prs_uint32( "prev_sk_off", ps, depth, &sk->prev_sk_off))
 707                 return False;
 708         if ( !prs_uint32( "next_sk_off", ps, depth, &sk->next_sk_off))
 709                 return False;
 710         if ( !prs_uint32( "ref_count", ps, depth, &sk->ref_count))
 711                 return False;
 712         if ( !prs_uint32( "size", ps, depth, &sk->size))
 713                 return False;
 714
 715         if ( !sec_io_desc( "sec_desc", &sk->sec_desc, ps, depth ))
 716                 return False;
 717
 718         end_off = prs_offset( &hbin->ps );
 719
 720         /* data_size must be divisible by 8 and large enough to hold the original record */
 721
 722         data_size = ((start_off - end_off) & 0xfffffff8 );
 723         if ( data_size > sk->rec_size )
 724                 DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, sk->rec_size));
 725
 726         if ( MARSHALLING(&hbin->ps) )
 727                 hbin->dirty = True;
 728
 729         return True;
 730 }
 731
 732 /*******************************************************************
 733 *******************************************************************/
 734
 735 static bool hbin_prs_vk_rec( const char *desc, REGF_HBIN *hbin, int depth, REGF_VK_REC *vk, REGF_FILE *file )
 736 {
 737         uint32 offset;
 738         uint16 name_length;
 739         prs_struct *ps = &hbin->ps;
 740         uint32 data_size, start_off, end_off;
 741
 742         prs_debug(ps, depth, desc, "prs_vk_rec");
 743         depth++;
 744
 745         /* backup and get the data_size */
 746
 747         if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
 748                 return False;
 749         start_off = prs_offset( &hbin->ps );
 750         if ( !prs_uint32( "rec_size", &hbin->ps, depth, &vk->rec_size ))
 751                 return False;
 752
 753         if ( !prs_uint8s( True, "header", ps, depth, (uint8*)vk->header, sizeof( vk->header )) )
 754                 return False;
 755
 756         if ( MARSHALLING(&hbin->ps) )
 757                 name_length = strlen(vk->valuename);
 758
 759         if ( !prs_uint16( "name_length", ps, depth, &name_length ))
 760                 return False;
 761         if ( !prs_uint32( "data_size", ps, depth, &vk->data_size ))
 762                 return False;
 763         if ( !prs_uint32( "data_off", ps, depth, &vk->data_off ))
 764                 return False;
 765         if ( !prs_uint32( "type", ps, depth, &vk->type))
 766                 return False;
 767         if ( !prs_uint16( "flag", ps, depth, &vk->flag))
 768                 return False;
 769
 770         offset = prs_offset( ps );
 771         offset += 2;    /* skip 2 bytes */
 772         prs_set_offset( ps, offset );
 773
 774         /* get the name */
 775
 776         if ( vk->flag&VK_FLAG_NAME_PRESENT ) {
 777
 778                 if ( UNMARSHALLING(&hbin->ps) ) {
 779                         if ( !(vk->valuename = PRS_ALLOC_MEM( ps, char, name_length+1 )))
 780                                 return False;
 781                 }
 782                 if ( !prs_uint8s( True, "name", ps, depth, (uint8*)vk->valuename, name_length ) )
 783                         return False;
 784         }
 785
 786         end_off = prs_offset( &hbin->ps );
 787
 788         /* get the data if necessary */
 789
 790         if ( vk->data_size != 0 ) {
 791                 bool charmode = False;
 792
 793                 if ( (vk->type == REG_SZ) || (vk->type == REG_MULTI_SZ) )
 794                         charmode = True;
 795
 796                 /* the data is stored in the offset if the size <= 4 */
 797
 798                 if ( !(vk->data_size & VK_DATA_IN_OFFSET) ) {
 799                         REGF_HBIN *hblock = hbin;
 800                         uint32 data_rec_size;
 801
 802                         if ( UNMARSHALLING(&hbin->ps) ) {
 803                                 if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8, vk->data_size) ) )
 804                                         return False;
 805                         }
 806
 807                         /* this data can be in another hbin */
 808                         if ( !hbin_contains_offset( hbin, vk->data_off ) ) {
 809                                 if ( !(hblock = lookup_hbin_block( file, vk->data_off )) )
 810                                         return False;
 811                         }
 812                         if ( !(prs_set_offset( &hblock->ps, (vk->data_off+HBIN_HDR_SIZE-hblock->first_hbin_off)-sizeof(uint32) )) )
 813                                 return False;
 814
 815                         if ( MARSHALLING(&hblock->ps) ) {
 816                                 data_rec_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
 817                                 data_rec_size = ( data_rec_size - 1 ) ^ 0xFFFFFFFF;
 818                         }
 819                         if ( !prs_uint32( "data_rec_size", &hblock->ps, depth, &data_rec_size ))
 820                                 return False;
 821                         if ( !prs_uint8s( charmode, "data", &hblock->ps, depth, vk->data, vk->data_size) )
 822                                 return False;
 823
 824                         if ( MARSHALLING(&hblock->ps) )
 825                                 hblock->dirty = True;
 826                 }
 827                 else {
 828                         if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8, 4 ) ) )
 829                                 return False;
 830                         SIVAL( vk->data, 0, vk->data_off );
 831                 }
 832
 833         }
 834
 835         /* data_size must be divisible by 8 and large enough to hold the original record */
 836
 837         data_size = ((start_off - end_off ) & 0xfffffff8 );
 838         if ( data_size !=  vk->rec_size )
 839                 DEBUG(10,("prs_vk_rec: data_size check failed (0x%x < 0x%x)\n", data_size, vk->rec_size));
 840
 841         if ( MARSHALLING(&hbin->ps) )
 842                 hbin->dirty = True;
 843
 844         return True;
 845 }
 846
 847 /*******************************************************************
 848  read a VK record which is contained in the HBIN block stored
 849  in the prs_struct *ps.
 850 *******************************************************************/
 851
 852 static bool hbin_prs_vk_records( const char *desc, REGF_HBIN *hbin, int depth, REGF_NK_REC *nk, REGF_FILE *file )
 853 {
 854         int i;
 855         uint32 record_size;
 856
 857         prs_debug(&hbin->ps, depth, desc, "prs_vk_records");
 858         depth++;
 859
 860         /* check if we have anything to do first */
 861
 862         if ( nk->num_values == 0 )
 863                 return True;
 864
 865         if ( UNMARSHALLING(&hbin->ps) ) {
 866                 if ( !(nk->values = PRS_ALLOC_MEM( &hbin->ps, REGF_VK_REC, nk->num_values ) ) )
 867                         return False;
 868         }
 869
 870         /* convert the offset to something relative to this HBIN block */
 871
 872         if ( !prs_set_offset( &hbin->ps, nk->values_off+HBIN_HDR_SIZE-hbin->first_hbin_off-sizeof(uint32)) )
 873                 return False;
 874
 875         if ( MARSHALLING( &hbin->ps) ) {
 876                 record_size = ( ( nk->num_values * sizeof(uint32) ) & 0xfffffff8 ) + 8;
 877                 record_size = (record_size - 1) ^ 0xFFFFFFFF;
 878         }
 879
 880         if ( !prs_uint32( "record_size", &hbin->ps, depth, &record_size ) )
 881                 return False;
 882
 883         for ( i=0; i<nk->num_values; i++ ) {
 884                 if ( !prs_uint32( "vk_off", &hbin->ps, depth, &nk->values[i].rec_off ) )
 885                         return False;
 886         }
 887
 888         for ( i=0; i<nk->num_values; i++ ) {
 889                 REGF_HBIN *sub_hbin = hbin;
 890                 uint32 new_offset;
 891
 892                 if ( !hbin_contains_offset( hbin, nk->values[i].rec_off ) ) {
 893                         sub_hbin = lookup_hbin_block( file, nk->values[i].rec_off );
 894                         if ( !sub_hbin ) {
 895                                 DEBUG(0,("hbin_prs_vk_records: Failed to find HBIN block containing offset [0x%x]\n",
 896                                         nk->values[i].hbin_off));
 897                                 return False;
 898                         }
 899                 }
 900
 901                 new_offset = nk->values[i].rec_off + HBIN_HDR_SIZE - sub_hbin->first_hbin_off;
 902                 if ( !prs_set_offset( &sub_hbin->ps, new_offset ) )
 903                         return False;
 904                 if ( !hbin_prs_vk_rec( "vk_rec", sub_hbin, depth, &nk->values[i], file ) )
 905                         return False;
 906         }
 907
 908         if ( MARSHALLING(&hbin->ps) )
 909                 hbin->dirty = True;
 910
 911
 912         return True;
 913 }
 914
 915
 916 /*******************************************************************
 917 *******************************************************************/
 918
 919 static REGF_SK_REC* find_sk_record_by_offset( REGF_FILE *file, uint32 offset )
 920 {
 921         REGF_SK_REC *p_sk;
 922
 923         for ( p_sk=file->sec_desc_list; p_sk; p_sk=p_sk->next ) {
 924                 if ( p_sk->sk_off == offset )
 925                         return p_sk;
 926         }
 927
 928         return NULL;
 929 }
 930
 931 /*******************************************************************
 932 *******************************************************************/
 933
 934 static REGF_SK_REC* find_sk_record_by_sec_desc( REGF_FILE *file, SEC_DESC *sd )
 935 {
 936         REGF_SK_REC *p;
 937
 938         for ( p=file->sec_desc_list; p; p=p->next ) {
 939                 if ( sec_desc_equal( p->sec_desc, sd ) )
 940                         return p;
 941         }
 942
 943         /* failure */
 944
 945         return NULL;
 946 }
 947
 948 /*******************************************************************
 949 *******************************************************************/
 950
 951 static bool hbin_prs_key( REGF_FILE *file, REGF_HBIN *hbin, REGF_NK_REC *nk )
 952 {
 953         int depth = 0;
 954         REGF_HBIN *sub_hbin;
 955
 956         prs_debug(&hbin->ps, depth, "", "fetch_key");
 957         depth++;
 958
 959         /* get the initial nk record */
 960
 961         if ( !prs_nk_rec( "nk_rec", &hbin->ps, depth, nk ))
 962                 return False;
 963
 964         /* fill in values */
 965
 966         if ( nk->num_values && (nk->values_off!=REGF_OFFSET_NONE) ) {
 967                 sub_hbin = hbin;
 968                 if ( !hbin_contains_offset( hbin, nk->values_off ) ) {
 969                         sub_hbin = lookup_hbin_block( file, nk->values_off );
 970                         if ( !sub_hbin ) {
 971                                 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing value_list_offset [0x%x]\n",
 972                                         nk->values_off));
 973                                 return False;
 974                         }
 975                 }
 976
 977                 if ( !hbin_prs_vk_records( "vk_rec", sub_hbin, depth, nk, file ))
 978                         return False;
 979         }
 980
 981         /* now get subkeys */
 982
 983         if ( nk->num_subkeys && (nk->subkeys_off!=REGF_OFFSET_NONE) ) {
 984                 sub_hbin = hbin;
 985                 if ( !hbin_contains_offset( hbin, nk->subkeys_off ) ) {
 986                         sub_hbin = lookup_hbin_block( file, nk->subkeys_off );
 987                         if ( !sub_hbin ) {
 988                                 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing subkey_offset [0x%x]\n",
 989                                         nk->subkeys_off));
 990                                 return False;
 991                         }
 992                 }
 993
 994                 if ( !hbin_prs_lf_records( "lf_rec", sub_hbin, depth, nk ))
 995                         return False;
 996         }
 997
 998         /* get the to the security descriptor.  First look if we have already parsed it */
 999
1000         if ( (nk->sk_off!=REGF_OFFSET_NONE) && !( nk->sec_desc = find_sk_record_by_offset( file, nk->sk_off )) ) {
1001
1002                 sub_hbin = hbin;
1003                 if ( !hbin_contains_offset( hbin, nk->sk_off ) ) {
1004                         sub_hbin = lookup_hbin_block( file, nk->sk_off );
1005                         if ( !sub_hbin ) {
1006                                 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing sk_offset [0x%x]\n",
1007                                         nk->subkeys_off));
1008                                 return False;
1009                         }
1010                 }
1011
1012                 if ( !(nk->sec_desc = TALLOC_ZERO_P( file->mem_ctx, REGF_SK_REC )) )
1013                         return False;
1014                 nk->sec_desc->sk_off = nk->sk_off;
1015                 if ( !hbin_prs_sk_rec( "sk_rec", sub_hbin, depth, nk->sec_desc ))
1016                         return False;
1017
1018                 /* add to the list of security descriptors (ref_count has been read from the files) */
1019
1020                 nk->sec_desc->sk_off = nk->sk_off;
1021                 DLIST_ADD( file->sec_desc_list, nk->sec_desc );
1022         }
1023
1024         return True;
1025 }
1026
1027 /*******************************************************************
1028 *******************************************************************/
1029
1030 static bool next_record( REGF_HBIN *hbin, const char *hdr, bool *eob )
1031 {
1032         uint8 header[REC_HDR_SIZE];
1033         uint32 record_size;
1034         uint32 curr_off, block_size;
1035         bool found = False;
1036         prs_struct *ps = &hbin->ps;
1037
1038         curr_off = prs_offset( ps );
1039         if ( curr_off == 0 )
1040                 prs_set_offset( ps, HBIN_HEADER_REC_SIZE );
1041
1042         /* assume that the current offset is at the record header
1043            and we need to backup to read the record size */
1044
1045         curr_off -= sizeof(uint32);
1046
1047         block_size = prs_data_size( ps );
1048         record_size = 0;
1049         memset( header, 0x0, sizeof(uint8)*REC_HDR_SIZE );
1050         while ( !found ) {
1051
1052                 curr_off = curr_off+record_size;
1053                 if ( curr_off >= block_size )
1054                         break;
1055
1056                 if ( !prs_set_offset( &hbin->ps, curr_off) )
1057                         return False;
1058
1059                 if ( !prs_uint32( "record_size", ps, 0, &record_size ) )
1060                         return False;
1061                 if ( !prs_uint8s( True, "header", ps, 0, header, REC_HDR_SIZE ) )
1062                         return False;
1063
1064                 if ( record_size & 0x80000000 ) {
1065                         /* absolute_value(record_size) */
1066                         record_size = (record_size ^ 0xffffffff) + 1;
1067                 }
1068
1069                 if ( memcmp( header, hdr, REC_HDR_SIZE ) == 0 ) {
1070                         found = True;
1071                         curr_off += sizeof(uint32);
1072                 }
1073         }
1074
1075         /* mark prs_struct as done ( at end ) if no more SK records */
1076         /* mark end-of-block as True */
1077
1078         if ( !found ) {
1079                 prs_set_offset( &hbin->ps, prs_data_size(&hbin->ps) );
1080                 *eob = True;
1081                 return False;
1082         }
1083
1084         if ( !prs_set_offset( ps, curr_off ) )
1085                 return False;
1086
1087         return True;
1088 }
1089
1090 /*******************************************************************
1091 *******************************************************************/
1092
1093 static bool next_nk_record( REGF_FILE *file, REGF_HBIN *hbin, REGF_NK_REC *nk, bool *eob )
1094 {
1095         if ( next_record( hbin, "nk", eob ) && hbin_prs_key( file, hbin, nk ) )
1096                 return True;
1097
1098         return False;
1099 }
1100
1101 /*******************************************************************
1102  Intialize the newly created REGF_BLOCK in *file and write the
1103  block header to disk
1104 *******************************************************************/
1105
1106 static bool init_regf_block( REGF_FILE *file )
1107 {
1108         prs_struct ps;
1109         bool result = True;
1110
1111         if ( !prs_init( &ps, REGF_BLOCKSIZE, file->mem_ctx, MARSHALL ) )
1112                 return False;
1113
1114         memcpy( file->header, "regf", REGF_HDR_SIZE );
1115         file->data_offset = 0x20;
1116         file->last_block  = 0x1000;
1117
1118         /* set mod time */
1119
1120         unix_to_nt_time( &file->mtime, time(NULL) );
1121
1122         /* hard coded values...no diea what these are ... maybe in time */
1123
1124         file->unknown1 = 0x2;
1125         file->unknown2 = 0x1;
1126         file->unknown3 = 0x3;
1127         file->unknown4 = 0x0;
1128         file->unknown5 = 0x1;
1129         file->unknown6 = 0x1;
1130
1131         /* write header to the buffer */
1132
1133         if ( !prs_regf_block( "regf_header", &ps, 0, file ) ) {
1134                 result = False;
1135                 goto out;
1136         }
1137
1138         /* calculate the checksum, re-marshall data (to include the checksum)
1139            and write to disk */
1140
1141         file->checksum = regf_block_checksum( &ps );
1142         prs_set_offset( &ps, 0 );
1143         if ( !prs_regf_block( "regf_header", &ps, 0, file ) ) {
1144                 result = False;
1145                 goto out;
1146         }
1147
1148         if ( write_block( file, &ps, 0 ) == -1 ) {
1149                 DEBUG(0,("init_regf_block: Failed to initialize registry header block!\n"));
1150                 result = False;
1151                 goto out;
1152         }
1153
1154 out:
1155         prs_mem_free( &ps );
1156
1157         return result;
1158 }
1159 /*******************************************************************
1160  Open the registry file and then read in the REGF block to get the
1161  first hbin offset.
1162 *******************************************************************/
1163
1164  REGF_FILE* regfio_open( const char *filename, int flags, int mode )
1165 {
1166         REGF_FILE *rb;
1167
1168         if ( !(rb = SMB_MALLOC_P(REGF_FILE)) ) {
1169                 DEBUG(0,("ERROR allocating memory\n"));
1170                 return NULL;
1171         }
1172         ZERO_STRUCTP( rb );
1173         rb->fd = -1;
1174
1175         if ( !(rb->mem_ctx = talloc_init( "read_regf_block" )) ) {
1176                 regfio_close( rb );
1177                 return NULL;
1178         }
1179
1180         rb->open_flags = flags;
1181
1182         /* open and existing file */
1183
1184         if ( (rb->fd = open(filename, flags, mode)) == -1 ) {
1185                 DEBUG(0,("regfio_open: failure to open %s (%s)\n", filename, strerror(errno)));
1186                 regfio_close( rb );
1187                 return NULL;
1188         }
1189
1190         /* check if we are creating a new file or overwriting an existing one */
1191
1192         if ( flags & (O_CREAT|O_TRUNC) ) {
1193                 if ( !init_regf_block( rb ) ) {
1194                         DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));
1195                         regfio_close( rb );
1196                         return NULL;
1197                 }
1198
1199                 /* success */
1200                 return rb;
1201         }
1202
1203         /* read in an existing file */
1204
1205         if ( !read_regf_block( rb ) ) {
1206                 DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));
1207                 regfio_close( rb );
1208                 return NULL;
1209         }
1210
1211         /* success */
1212
1213         return rb;
1214 }
1215
1216 /*******************************************************************
1217 *******************************************************************/
1218
1219 static void regfio_mem_free( REGF_FILE *file )
1220 {
1221         /* free any talloc()'d memory */
1222
1223         if ( file && file->mem_ctx )
1224                 talloc_destroy( file->mem_ctx );
1225 }
1226
1227 /*******************************************************************
1228 *******************************************************************/
1229
1230  int regfio_close( REGF_FILE *file )
1231 {
1232         int fd;
1233
1234         /* cleanup for a file opened for write */
1235
1236         if ((file->fd != -1) && (file->open_flags & (O_WRONLY|O_RDWR))) {
1237                 prs_struct ps;
1238                 REGF_SK_REC *sk;
1239
1240                 /* write of sd list */
1241
1242                 for ( sk=file->sec_desc_list; sk; sk=sk->next ) {
1243                         hbin_prs_sk_rec( "sk_rec", sk->hbin, 0, sk );
1244                 }
1245
1246                 /* flush any dirty blocks */
1247
1248                 while ( file->block_list ) {
1249                         hbin_block_close( file, file->block_list );
1250                 }
1251
1252                 ZERO_STRUCT( ps );
1253
1254                 unix_to_nt_time( &file->mtime, time(NULL) );
1255
1256                 if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) != -1 ) {
1257                         /* now use for writing */
1258                         prs_switch_type( &ps, MARSHALL );
1259
1260                         /* stream the block once, generate the checksum,
1261                            and stream it again */
1262                         prs_set_offset( &ps, 0 );
1263                         prs_regf_block( "regf_blocK", &ps, 0, file );
1264                         file->checksum = regf_block_checksum( &ps );
1265                         prs_set_offset( &ps, 0 );
1266                         prs_regf_block( "regf_blocK", &ps, 0, file );
1267
1268                         /* now we are ready to write it to disk */
1269                         if ( write_block( file, &ps, 0 ) == -1 )
1270                                 DEBUG(0,("regfio_close: failed to update the regf header block!\n"));
1271                 }
1272
1273                 prs_mem_free( &ps );
1274         }
1275
1276         regfio_mem_free( file );
1277
1278         /* nothing tdo do if there is no open file */
1279
1280         if (file->fd == -1)
1281                 return 0;
1282
1283         fd = file->fd;
1284         file->fd = -1;
1285         SAFE_FREE( file );
1286
1287         return close( fd );
1288 }
1289
1290 /*******************************************************************
1291 *******************************************************************/
1292
1293 static void regfio_flush( REGF_FILE *file )
1294 {
1295         REGF_HBIN *hbin;
1296
1297         for ( hbin=file->block_list; hbin; hbin=hbin->next ) {
1298                 write_hbin_block( file, hbin );
1299         }
1300 }
1301
1302 /*******************************************************************
1303  There should be only *one* root key in the registry file based
1304  on my experience.  --jerry
1305 *******************************************************************/
1306
1307 REGF_NK_REC* regfio_rootkey( REGF_FILE *file )
1308 {
1309         REGF_NK_REC *nk;
1310         REGF_HBIN   *hbin;
1311         uint32      offset = REGF_BLOCKSIZE;
1312         bool        found = False;
1313         bool        eob;
1314
1315         if ( !file )
1316                 return NULL;
1317
1318         if ( !(nk = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) ) {
1319                 DEBUG(0,("regfio_rootkey: talloc() failed!\n"));
1320                 return NULL;
1321         }
1322
1323         /* scan through the file on HBIN block at a time looking
1324            for an NK record with a type == 0x002c.
1325            Normally this is the first nk record in the first hbin
1326            block (but I'm not assuming that for now) */
1327
1328         while ( (hbin = read_hbin_block( file, offset )) ) {
1329                 eob = False;
1330
1331                 while ( !eob) {
1332                         if ( next_nk_record( file, hbin, nk, &eob ) ) {
1333                                 if ( nk->key_type == NK_TYPE_ROOTKEY ) {
1334                                         found = True;
1335                                         break;
1336                                 }
1337                         }
1338                         prs_mem_free( &hbin->ps );
1339                 }
1340
1341                 if ( found )
1342                         break;
1343
1344                 offset += hbin->block_size;
1345         }
1346
1347         if ( !found ) {
1348                 DEBUG(0,("regfio_rootkey: corrupt registry file ?  No root key record located\n"));
1349                 return NULL;
1350         }
1351
1352         DLIST_ADD( file->block_list, hbin );
1353
1354         return nk;
1355 }
1356
1357 /*******************************************************************
1358  This acts as an interator over the subkeys defined for a given
1359  NK record.  Remember that offsets are from the *first* HBIN block.
1360 *******************************************************************/
1361
1362  REGF_NK_REC* regfio_fetch_subkey( REGF_FILE *file, REGF_NK_REC *nk )
1363 {
1364         REGF_NK_REC *subkey;
1365         REGF_HBIN   *hbin;
1366         uint32      nk_offset;
1367
1368         /* see if there is anything left to report */
1369
1370         if ( !nk || (nk->subkeys_off==REGF_OFFSET_NONE) || (nk->subkey_index >= nk->num_subkeys) )
1371                 return NULL;
1372
1373         /* find the HBIN block which should contain the nk record */
1374
1375         if ( !(hbin = lookup_hbin_block( file, nk->subkeys.hashes[nk->subkey_index].nk_off )) ) {
1376                 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing offset [0x%x]\n",
1377                         nk->subkeys.hashes[nk->subkey_index].nk_off));
1378                 return NULL;
1379         }
1380
1381         nk_offset = nk->subkeys.hashes[nk->subkey_index].nk_off;
1382         if ( !prs_set_offset( &hbin->ps, (HBIN_HDR_SIZE + nk_offset - hbin->first_hbin_off) ) )
1383                 return NULL;
1384
1385         nk->subkey_index++;
1386         if ( !(subkey = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) )
1387                 return NULL;
1388
1389         if ( !hbin_prs_key( file, hbin, subkey ) )
1390                 return NULL;
1391
1392         return subkey;
1393 }
1394
1395
1396 /*******************************************************************
1397 *******************************************************************/
1398
1399 static REGF_HBIN* regf_hbin_allocate( REGF_FILE *file, uint32 block_size )
1400 {
1401         REGF_HBIN *hbin;
1402         SMB_STRUCT_STAT sbuf;
1403
1404         if ( !(hbin = TALLOC_ZERO_P( file->mem_ctx, REGF_HBIN )) )
1405                 return NULL;
1406
1407         memcpy( hbin->header, "hbin", sizeof(HBIN_HDR_SIZE) );
1408
1409
1410         if ( sys_fstat( file->fd, &sbuf ) ) {
1411                 DEBUG(0,("regf_hbin_allocate: stat() failed! (%s)\n", strerror(errno)));
1412                 return NULL;
1413         }
1414
1415         hbin->file_off       = sbuf.st_size;
1416
1417         hbin->free_off       = HBIN_HEADER_REC_SIZE;
1418         hbin->free_size      = block_size - hbin->free_off + sizeof(uint32);;
1419
1420         hbin->block_size     = block_size;
1421         hbin->first_hbin_off = hbin->file_off - REGF_BLOCKSIZE;
1422
1423         if ( !prs_init( &hbin->ps, block_size, file->mem_ctx, MARSHALL ) )
1424                 return NULL;
1425
1426         if ( !prs_hbin_block( "new_hbin", &hbin->ps, 0, hbin ) )
1427                 return NULL;
1428
1429         if ( !write_hbin_block( file, hbin ) )
1430                 return NULL;
1431
1432         file->last_block = hbin->file_off;
1433
1434         return hbin;
1435 }
1436
1437 /*******************************************************************
1438 *******************************************************************/
1439
1440 static void update_free_space( REGF_HBIN *hbin, uint32 size_used )
1441 {
1442         hbin->free_off  += size_used;
1443         hbin->free_size -= size_used;
1444
1445         if ( hbin->free_off >= hbin->block_size ) {
1446                 hbin->free_off = REGF_OFFSET_NONE;
1447         }
1448
1449         return;
1450 }
1451
1452 /*******************************************************************
1453 *******************************************************************/
1454
1455 static REGF_HBIN* find_free_space( REGF_FILE *file, uint32 size )
1456 {
1457         REGF_HBIN *hbin, *p_hbin;
1458         uint32 block_off;
1459         bool cached;
1460
1461         /* check open block list */
1462
1463         for ( hbin=file->block_list; hbin!=NULL; hbin=hbin->next ) {
1464                 /* only check blocks that actually have available space */
1465
1466                 if ( hbin->free_off == REGF_OFFSET_NONE )
1467                         continue;
1468
1469                 /* check for a large enough available chunk */
1470
1471                 if ( (hbin->block_size - hbin->free_off) >= size ) {
1472                         DLIST_PROMOTE( file->block_list, hbin );
1473                         goto done;
1474                 }
1475         }
1476
1477         /* parse the file until we find a block with
1478            enough free space; save the last non-filled hbin */
1479
1480         block_off = REGF_BLOCKSIZE;
1481         do {
1482                 /* cleanup before the next round */
1483                 cached = False;
1484                 if ( hbin )
1485                         prs_mem_free( &hbin->ps );
1486
1487                 hbin = read_hbin_block( file, block_off );
1488
1489                 if ( hbin ) {
1490
1491                         /* make sure that we don't already have this block in memory */
1492
1493                         for ( p_hbin=file->block_list; p_hbin!=NULL; p_hbin=p_hbin->next ) {
1494                                 if ( p_hbin->file_off == hbin->file_off ) {
1495                                         cached = True;
1496                                         break;
1497                                 }
1498                         }
1499
1500                         block_off = hbin->file_off + hbin->block_size;
1501
1502                         if ( cached ) {
1503                                 prs_mem_free( &hbin->ps );
1504                                 hbin = NULL;
1505                                 continue;
1506                         }
1507                 }
1508         /* if (cached block or (new block and not enough free space)) then continue looping */
1509         } while ( cached || (hbin && (hbin->free_size < size)) );
1510
1511         /* no free space; allocate a new one */
1512
1513         if ( !hbin ) {
1514                 uint32 alloc_size;
1515
1516                 /* allocate in multiples of REGF_ALLOC_BLOCK; make sure (size + hbin_header) fits */
1517
1518                 alloc_size = (((size+HBIN_HEADER_REC_SIZE) / REGF_ALLOC_BLOCK ) + 1 ) * REGF_ALLOC_BLOCK;
1519
1520                 if ( !(hbin = regf_hbin_allocate( file, alloc_size )) ) {
1521                         DEBUG(0,("find_free_space: regf_hbin_allocate() failed!\n"));
1522                         return NULL;
1523                 }
1524                 DLIST_ADD( file->block_list, hbin );
1525         }
1526
1527 done:
1528         /* set the offset to be ready to write */
1529
1530         if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32) ) )
1531                 return NULL;
1532
1533         /* write the record size as a placeholder for now, it should be
1534            probably updated by the caller once it all of the data necessary
1535            for the record */
1536
1537         if ( !prs_uint32("allocated_size", &hbin->ps, 0, &size) )
1538                 return False;
1539
1540         update_free_space( hbin, size );
1541
1542         return hbin;
1543 }
1544
1545 /*******************************************************************
1546 *******************************************************************/
1547
1548 static uint32 sk_record_data_size( SEC_DESC * sd )
1549 {
1550         uint32 size, size_mod8;
1551
1552         size_mod8 = 0;
1553
1554         /* the record size is sizeof(hdr) + name + static members + data_size_field */
1555
1556         size = sizeof(uint32)*5 + ndr_size_security_descriptor(sd, NULL, 0) + sizeof(uint32);
1557
1558         /* multiple of 8 */
1559         size_mod8 = size & 0xfffffff8;
1560         if ( size_mod8 < size )
1561                 size_mod8 += 8;
1562
1563         return size_mod8;
1564 }
1565
1566 /*******************************************************************
1567 *******************************************************************/
1568
1569 static uint32 vk_record_data_size( REGF_VK_REC *vk )
1570 {
1571         uint32 size, size_mod8;
1572
1573         size_mod8 = 0;
1574
1575         /* the record size is sizeof(hdr) + name + static members + data_size_field */
1576
1577         size = REC_HDR_SIZE + (sizeof(uint16)*3) + (sizeof(uint32)*3) + sizeof(uint32);
1578
1579         if ( vk->valuename )
1580                 size += strlen(vk->valuename);
1581
1582         /* multiple of 8 */
1583         size_mod8 = size & 0xfffffff8;
1584         if ( size_mod8 < size )
1585                 size_mod8 += 8;
1586
1587         return size_mod8;
1588 }
1589
1590 /*******************************************************************
1591 *******************************************************************/
1592
1593 static uint32 lf_record_data_size( uint32 num_keys )
1594 {
1595         uint32 size, size_mod8;
1596
1597         size_mod8 = 0;
1598
1599         /* the record size is sizeof(hdr) + num_keys + sizeof of hash_array + data_size_uint32 */
1600
1601         size = REC_HDR_SIZE + sizeof(uint16) + (sizeof(REGF_HASH_REC) * num_keys) + sizeof(uint32);
1602
1603         /* multiple of 8 */
1604         size_mod8 = size & 0xfffffff8;
1605         if ( size_mod8 < size )
1606                 size_mod8 += 8;
1607
1608         return size_mod8;
1609 }
1610
1611 /*******************************************************************
1612 *******************************************************************/
1613
1614 static uint32 nk_record_data_size( REGF_NK_REC *nk )
1615 {
1616         uint32 size, size_mod8;
1617
1618         size_mod8 = 0;
1619
1620         /* the record size is static + length_of_keyname + length_of_classname + data_size_uint32 */
1621
1622         size = 0x4c + strlen(nk->keyname) + sizeof(uint32);
1623
1624         if ( nk->classname )
1625                 size += strlen( nk->classname );
1626
1627         /* multiple of 8 */
1628         size_mod8 = size & 0xfffffff8;
1629         if ( size_mod8 < size )
1630                 size_mod8 += 8;
1631
1632         return size_mod8;
1633 }
1634
1635 /*******************************************************************
1636 *******************************************************************/
1637
1638 static bool create_vk_record( REGF_FILE *file, REGF_VK_REC *vk, REGISTRY_VALUE *value )
1639 {
1640         char *name = regval_name(value);
1641         REGF_HBIN *data_hbin;
1642
1643         ZERO_STRUCTP( vk );
1644
1645         memcpy( vk->header, "vk", REC_HDR_SIZE );
1646
1647         if ( name ) {
1648                 vk->valuename = talloc_strdup( file->mem_ctx, regval_name(value) );
1649                 vk->flag = VK_FLAG_NAME_PRESENT;
1650         }
1651
1652         vk->data_size = regval_size( value );
1653         vk->type      = regval_type( value );
1654
1655         if ( vk->data_size > sizeof(uint32) ) {
1656                 uint32 data_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
1657
1658                 vk->data = (uint8 *)TALLOC_MEMDUP( file->mem_ctx,
1659                                                    regval_data_p(value),
1660                                                    vk->data_size );
1661                 if (vk->data == NULL) {
1662                         return False;
1663                 }
1664
1665                 /* go ahead and store the offset....we'll pick this hbin block back up when
1666                    we stream the data */
1667
1668                 if ((data_hbin = find_free_space(file, data_size )) == NULL) {
1669                         return False;
1670                 }
1671                 vk->data_off = prs_offset( &data_hbin->ps ) + data_hbin->first_hbin_off - HBIN_HDR_SIZE;
1672         }
1673         else {
1674                 /* make sure we don't try to copy from a NULL value pointer */
1675
1676                 if ( vk->data_size != 0 )
1677                         memcpy( &vk->data_off, regval_data_p(value), sizeof(uint32) );
1678                 vk->data_size |= VK_DATA_IN_OFFSET;
1679         }
1680
1681         return True;
1682 }
1683
1684 /*******************************************************************
1685 *******************************************************************/
1686
1687 static int hashrec_cmp( REGF_HASH_REC *h1, REGF_HASH_REC *h2 )
1688 {
1689         return StrCaseCmp( h1->fullname, h2->fullname );
1690 }
1691
1692 /*******************************************************************
1693 *******************************************************************/
1694
1695  REGF_NK_REC* regfio_write_key( REGF_FILE *file, const char *name,
1696                                REGVAL_CTR *values, struct regsubkey_ctr *subkeys,
1697                                SEC_DESC *sec_desc, REGF_NK_REC *parent )
1698 {
1699         REGF_NK_REC *nk;
1700         REGF_HBIN *vlist_hbin = NULL;
1701         uint32 size;
1702
1703         if ( !(nk = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) )
1704                 return NULL;
1705
1706         memcpy( nk->header, "nk", REC_HDR_SIZE );
1707
1708         if ( !parent )
1709                 nk->key_type = NK_TYPE_ROOTKEY;
1710         else
1711                 nk->key_type = NK_TYPE_NORMALKEY;
1712
1713         /* store the parent offset (or -1 if a the root key */
1714
1715         nk->parent_off = parent ? (parent->hbin_off + parent->hbin->file_off - REGF_BLOCKSIZE - HBIN_HDR_SIZE ) : REGF_OFFSET_NONE;
1716
1717         /* no classname currently */
1718
1719         nk->classname_off = REGF_OFFSET_NONE;
1720         nk->classname = NULL;
1721         nk->keyname = talloc_strdup( file->mem_ctx, name );
1722
1723         /* current modification time */
1724
1725         unix_to_nt_time( &nk->mtime, time(NULL) );
1726
1727         /* allocate the record on disk */
1728
1729         size = nk_record_data_size( nk );
1730         nk->rec_size = ( size - 1 ) ^ 0XFFFFFFFF;
1731         if ((nk->hbin = find_free_space( file, size )) == NULL) {
1732                 return NULL;
1733         }
1734         nk->hbin_off = prs_offset( &nk->hbin->ps );
1735
1736         /* Update the hash record in the parent */
1737
1738         if ( parent ) {
1739                 REGF_HASH_REC *hash = &parent->subkeys.hashes[parent->subkey_index];
1740
1741                 hash->nk_off = prs_offset( &nk->hbin->ps ) + nk->hbin->first_hbin_off - HBIN_HDR_SIZE;
1742                 memcpy( hash->keycheck, name, sizeof(uint32) );
1743                 hash->fullname = talloc_strdup( file->mem_ctx, name );
1744                 parent->subkey_index++;
1745
1746                 /* sort the list by keyname */
1747
1748                 qsort( parent->subkeys.hashes, parent->subkey_index, sizeof(REGF_HASH_REC), QSORT_CAST hashrec_cmp );
1749
1750                 if ( !hbin_prs_lf_records( "lf_rec", parent->subkeys.hbin, 0, parent ) )
1751                         return False;
1752         }
1753
1754         /* write the security descriptor */
1755
1756         nk->sk_off = REGF_OFFSET_NONE;
1757         if ( sec_desc ) {
1758                 uint32 sk_size = sk_record_data_size( sec_desc );
1759                 REGF_HBIN *sk_hbin;
1760
1761                 /* search for it in the existing list of sd's */
1762
1763                 if ( (nk->sec_desc = find_sk_record_by_sec_desc( file, sec_desc )) == NULL ) {
1764                         /* not found so add it to the list */
1765
1766                         if (!(sk_hbin = find_free_space( file, sk_size ))) {
1767                                 return NULL;
1768                         }
1769
1770                         if ( !(nk->sec_desc = TALLOC_ZERO_P( file->mem_ctx, REGF_SK_REC )) )
1771                                 return NULL;
1772
1773                         /* now we have to store the security descriptor in the list and
1774                            update the offsets */
1775
1776                         memcpy( nk->sec_desc->header, "sk", REC_HDR_SIZE );
1777                         nk->sec_desc->hbin      = sk_hbin;
1778                         nk->sec_desc->hbin_off  = prs_offset( &sk_hbin->ps );
1779                         nk->sec_desc->sk_off    = prs_offset( &sk_hbin->ps ) + sk_hbin->first_hbin_off - HBIN_HDR_SIZE;
1780                         nk->sec_desc->rec_size  = (sk_size-1)  ^ 0xFFFFFFFF;
1781
1782                         nk->sec_desc->sec_desc  = sec_desc;
1783                         nk->sec_desc->ref_count = 0;
1784
1785                         /* size value must be self-inclusive */
1786                         nk->sec_desc->size      = ndr_size_security_descriptor(sec_desc, NULL, 0)
1787                                 + sizeof(uint32);
1788
1789                         DLIST_ADD_END( file->sec_desc_list, nk->sec_desc, REGF_SK_REC *);
1790
1791                         /* update the offsets for us and the previous sd in the list.
1792                            if this is the first record, then just set the next and prev
1793                            offsets to ourself. */
1794
1795                         if ( nk->sec_desc->prev ) {
1796                                 REGF_SK_REC *prev = nk->sec_desc->prev;
1797
1798                                 nk->sec_desc->prev_sk_off = prev->hbin_off + prev->hbin->first_hbin_off - HBIN_HDR_SIZE;
1799                                 prev->next_sk_off = nk->sec_desc->sk_off;
1800
1801                                 /* the end must loop around to the front */
1802                                 nk->sec_desc->next_sk_off = file->sec_desc_list->sk_off;
1803
1804                                 /* and first must loop around to the tail */
1805                                 file->sec_desc_list->prev_sk_off = nk->sec_desc->sk_off;
1806                         } else {
1807                                 nk->sec_desc->prev_sk_off = nk->sec_desc->sk_off;
1808                                 nk->sec_desc->next_sk_off = nk->sec_desc->sk_off;
1809                         }
1810                 }
1811
1812                 /* bump the reference count +1 */
1813
1814                 nk->sk_off = nk->sec_desc->sk_off;
1815                 nk->sec_desc->ref_count++;
1816         }
1817
1818         /* write the subkeys */
1819
1820         nk->subkeys_off = REGF_OFFSET_NONE;
1821         if ( (nk->num_subkeys = regsubkey_ctr_numkeys( subkeys )) != 0 ) {
1822                 uint32 lf_size = lf_record_data_size( nk->num_subkeys );
1823                 uint32 namelen;
1824                 int i;
1825
1826                 if (!(nk->subkeys.hbin = find_free_space( file, lf_size ))) {
1827                         return NULL;
1828                 }
1829                 nk->subkeys.hbin_off = prs_offset( &nk->subkeys.hbin->ps );
1830                 nk->subkeys.rec_size = (lf_size-1) ^ 0xFFFFFFFF;
1831                 nk->subkeys_off = prs_offset( &nk->subkeys.hbin->ps ) + nk->subkeys.hbin->first_hbin_off - HBIN_HDR_SIZE;
1832
1833                 memcpy( nk->subkeys.header, "lf", REC_HDR_SIZE );
1834
1835                 nk->subkeys.num_keys = nk->num_subkeys;
1836                 if (nk->subkeys.num_keys) {
1837                         if ( !(nk->subkeys.hashes = TALLOC_ZERO_ARRAY( file->mem_ctx, REGF_HASH_REC, nk->subkeys.num_keys )) )
1838                                 return NULL;
1839                 } else {
1840                         nk->subkeys.hashes = NULL;
1841                 }
1842                 nk->subkey_index = 0;
1843
1844                 /* update the max_bytes_subkey{name,classname} fields */
1845                 for ( i=0; i<nk->num_subkeys; i++ ) {
1846                         namelen = strlen( regsubkey_ctr_specific_key(subkeys, i) );
1847                         if ( namelen*2 > nk->max_bytes_subkeyname )
1848                                 nk->max_bytes_subkeyname = namelen * 2;
1849                 }
1850         }
1851
1852         /* write the values */
1853
1854         nk->values_off = REGF_OFFSET_NONE;
1855         if ( (nk->num_values = regval_ctr_numvals( values )) != 0 ) {
1856                 uint32 vlist_size = ( ( nk->num_values * sizeof(uint32) ) & 0xfffffff8 ) + 8;
1857                 int i;
1858
1859                 if (!(vlist_hbin = find_free_space( file, vlist_size ))) {
1860                         return NULL;
1861                 }
1862                 nk->values_off = prs_offset( &vlist_hbin->ps ) + vlist_hbin->first_hbin_off - HBIN_HDR_SIZE;
1863
1864                 if (nk->num_values) {
1865                         if ( !(nk->values = TALLOC_ARRAY( file->mem_ctx, REGF_VK_REC, nk->num_values )) )
1866                                 return NULL;
1867                 } else {
1868                         nk->values = NULL;
1869                 }
1870
1871                 /* create the vk records */
1872
1873                 for ( i=0; i<nk->num_values; i++ ) {
1874                         uint32 vk_size, namelen, datalen;
1875                         REGISTRY_VALUE *r;
1876
1877                         r = regval_ctr_specific_value( values, i );
1878                         create_vk_record( file, &nk->values[i], r );
1879                         vk_size = vk_record_data_size( &nk->values[i] );
1880                         nk->values[i].hbin = find_free_space( file, vk_size );
1881                         nk->values[i].hbin_off = prs_offset( &nk->values[i].hbin->ps );
1882                         nk->values[i].rec_size = ( vk_size - 1 ) ^ 0xFFFFFFFF;
1883                         nk->values[i].rec_off = prs_offset( &nk->values[i].hbin->ps )
1884                                 + nk->values[i].hbin->first_hbin_off
1885                                 - HBIN_HDR_SIZE;
1886
1887                         /* update the max bytes fields if necessary */
1888
1889                         namelen = strlen( regval_name(r) );
1890                         if ( namelen*2 > nk->max_bytes_valuename )
1891                                 nk->max_bytes_valuename = namelen * 2;
1892
1893                         datalen = regval_size( r );
1894                         if ( datalen > nk->max_bytes_value )
1895                                 nk->max_bytes_value = datalen;
1896                 }
1897         }
1898
1899         /* stream the records */
1900
1901         prs_set_offset( &nk->hbin->ps, nk->hbin_off );
1902         if ( !prs_nk_rec( "nk_rec", &nk->hbin->ps, 0, nk ) )
1903                 return False;
1904
1905         if ( nk->num_values ) {
1906                 if ( !hbin_prs_vk_records( "vk_records", vlist_hbin, 0, nk, file ) )
1907                         return False;
1908         }
1909
1910
1911         regfio_flush( file );
1912
1913         return nk;
1914 }
1915