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r22099: Revert parts of revision 22056 as proto_exists is not required by
[Samba.git] / source / registry / regfio.c
blobf2e95da8898025cb7f39ae6b750ca98e5e020f22
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 2 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, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21 #include "includes.h"
22 #include "regfio.h"
23
24 /*******************************************************************
25 *
26 * TODO : Right now this code basically ignores classnames.
27 *
28 ******************************************************************/
29
30
31 /*******************************************************************
32 *******************************************************************/
33
34 static int write_block( REGF_FILE *file, prs_struct *ps, uint32 offset )
35 {
36 int bytes_written, returned;
37 char *buffer = prs_data_p( ps );
38 uint32 buffer_size = prs_data_size( ps );
39 SMB_STRUCT_STAT sbuf;
40
41 if ( file->fd == -1 )
42 return -1;
43
44 /* check for end of file */
45
46 if ( sys_fstat( file->fd, &sbuf ) ) {
47 DEBUG(0,("write_block: stat() failed! (%s)\n", strerror(errno)));
48 return -1;
49 }
50
51 if ( lseek( file->fd, offset, SEEK_SET ) == -1 ) {
52 DEBUG(0,("write_block: lseek() failed! (%s)\n", strerror(errno) ));
53 return -1;
54 }
55
56 bytes_written = returned = 0;
57 while ( bytes_written < buffer_size ) {
58 if ( (returned = write( file->fd, buffer+bytes_written, buffer_size-bytes_written )) == -1 ) {
59 DEBUG(0,("write_block: write() failed! (%s)\n", strerror(errno) ));
60 return False;
61 }
62
63 bytes_written += returned;
64 }
65
66 return bytes_written;
67 }
68
69 /*******************************************************************
70 *******************************************************************/
71
72 static int read_block( REGF_FILE *file, prs_struct *ps, uint32 file_offset, uint32 block_size )
73 {
74 int bytes_read, returned;
75 char *buffer;
76 SMB_STRUCT_STAT sbuf;
77
78 /* check for end of file */
79
80 if ( sys_fstat( file->fd, &sbuf ) ) {
81 DEBUG(0,("read_block: stat() failed! (%s)\n", strerror(errno)));
82 return -1;
83 }
84
85 if ( (size_t)file_offset >= sbuf.st_size )
86 return -1;
87
88 /* if block_size == 0, we are parsing HBIN records and need
89 to read some of the header to get the block_size from there */
90
91 if ( block_size == 0 ) {
92 char hdr[0x20];
93
94 if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
95 DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));
96 return -1;
97 }
98
99 returned = read( file->fd, hdr, 0x20 );
100 if ( (returned == -1) || (returned < 0x20) ) {
101 DEBUG(0,("read_block: failed to read in HBIN header. Is the file corrupt?\n"));
102 return -1;
103 }
104
105 /* make sure this is an hbin header */
106
107 if ( strncmp( hdr, "hbin", HBIN_HDR_SIZE ) != 0 ) {
108 DEBUG(0,("read_block: invalid block header!\n"));
109 return -1;
110 }
111
112 block_size = IVAL( hdr, 0x08 );
113 }
114
115 DEBUG(10,("read_block: block_size == 0x%x\n", block_size ));
116
117 /* set the offset, initialize the buffer, and read the block from disk */
118
119 if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
120 DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));
121 return -1;
122 }
123
124 prs_init( ps, block_size, file->mem_ctx, UNMARSHALL );
125 buffer = prs_data_p( ps );
126 bytes_read = returned = 0;
127
128 while ( bytes_read < block_size ) {
129 if ( (returned = read( file->fd, buffer+bytes_read, block_size-bytes_read )) == -1 ) {
130 DEBUG(0,("read_block: read() failed (%s)\n", strerror(errno) ));
131 return False;
132 }
133 if ( (returned == 0) && (bytes_read < block_size) ) {
134 DEBUG(0,("read_block: not a vald registry file ?\n" ));
135 return False;
136 }
137
138 bytes_read += returned;
139 }
140
141 return bytes_read;
142 }
143
144 /*******************************************************************
145 *******************************************************************/
146
147 static BOOL write_hbin_block( REGF_FILE *file, REGF_HBIN *hbin )
148 {
149 if ( !hbin->dirty )
150 return True;
151
152 /* write free space record if any is available */
153
154 if ( hbin->free_off != REGF_OFFSET_NONE ) {
155 uint32 header = 0xffffffff;
156
157 if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32) ) )
158 return False;
159 if ( !prs_uint32( "free_size", &hbin->ps, 0, &hbin->free_size ) )
160 return False;
161 if ( !prs_uint32( "free_header", &hbin->ps, 0, &header ) )
162 return False;
163 }
164
165 hbin->dirty = (write_block( file, &hbin->ps, hbin->file_off ) != -1);
166
167 return hbin->dirty;
168 }
169
170 /*******************************************************************
171 *******************************************************************/
172
173 static BOOL hbin_block_close( REGF_FILE *file, REGF_HBIN *hbin )
174 {
175 REGF_HBIN *p;
176
177 /* remove the block from the open list and flush it to disk */
178
179 for ( p=file->block_list; p && p!=hbin; p=p->next )
180 ;;
181
182 if ( p == hbin ) {
183 DLIST_REMOVE( file->block_list, hbin );
184 }
185 else
186 DEBUG(0,("hbin_block_close: block not in open list!\n"));
187
188 if ( !write_hbin_block( file, hbin ) )
189 return False;
190
191 return True;
192 }
193
194 /*******************************************************************
195 *******************************************************************/
196
197 static BOOL prs_regf_block( const char *desc, prs_struct *ps, int depth, REGF_FILE *file )
198 {
199 prs_debug(ps, depth, desc, "prs_regf_block");
200 depth++;
201
202 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)file->header, sizeof( file->header )) )
203 return False;
204
205 /* yes, these values are always identical so store them only once */
206
207 if ( !prs_uint32( "unknown1", ps, depth, &file->unknown1 ))
208 return False;
209 if ( !prs_uint32( "unknown1 (again)", ps, depth, &file->unknown1 ))
210 return False;
211
212 /* get the modtime */
213
214 if ( !prs_set_offset( ps, 0x0c ) )
215 return False;
216 if ( !smb_io_time( "modtime", &file->mtime, ps, depth ) )
217 return False;
218
219 /* constants */
220
221 if ( !prs_uint32( "unknown2", ps, depth, &file->unknown2 ))
222 return False;
223 if ( !prs_uint32( "unknown3", ps, depth, &file->unknown3 ))
224 return False;
225 if ( !prs_uint32( "unknown4", ps, depth, &file->unknown4 ))
226 return False;
227 if ( !prs_uint32( "unknown5", ps, depth, &file->unknown5 ))
228 return False;
229
230 /* get file offsets */
231
232 if ( !prs_set_offset( ps, 0x24 ) )
233 return False;
234 if ( !prs_uint32( "data_offset", ps, depth, &file->data_offset ))
235 return False;
236 if ( !prs_uint32( "last_block", ps, depth, &file->last_block ))
237 return False;
238
239 /* one more constant */
240
241 if ( !prs_uint32( "unknown6", ps, depth, &file->unknown6 ))
242 return False;
243
244 /* get the checksum */
245
246 if ( !prs_set_offset( ps, 0x01fc ) )
247 return False;
248 if ( !prs_uint32( "checksum", ps, depth, &file->checksum ))
249 return False;
250
251 return True;
252 }
253
254 /*******************************************************************
255 *******************************************************************/
256
257 static BOOL prs_hbin_block( const char *desc, prs_struct *ps, int depth, REGF_HBIN *hbin )
258 {
259 uint32 block_size2;
260
261 prs_debug(ps, depth, desc, "prs_regf_block");
262 depth++;
263
264 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)hbin->header, sizeof( hbin->header )) )
265 return False;
266
267 if ( !prs_uint32( "first_hbin_off", ps, depth, &hbin->first_hbin_off ))
268 return False;
269
270 /* The dosreg.cpp comments say that the block size is at 0x1c.
271 According to a WINXP NTUSER.dat file, this is wrong. The block_size
272 is at 0x08 */
273
274 if ( !prs_uint32( "block_size", ps, depth, &hbin->block_size ))
275 return False;
276
277 block_size2 = hbin->block_size;
278 prs_set_offset( ps, 0x1c );
279 if ( !prs_uint32( "block_size2", ps, depth, &block_size2 ))
280 return False;
281
282 if ( MARSHALLING(ps) )
283 hbin->dirty = True;
284
285
286 return True;
287 }
288
289 /*******************************************************************
290 *******************************************************************/
291
292 static BOOL prs_nk_rec( const char *desc, prs_struct *ps, int depth, REGF_NK_REC *nk )
293 {
294 uint16 class_length, name_length;
295 uint32 start;
296 uint32 data_size, start_off, end_off;
297 uint32 unknown_off = REGF_OFFSET_NONE;
298
299 nk->hbin_off = prs_offset( ps );
300 start = nk->hbin_off;
301
302 prs_debug(ps, depth, desc, "prs_nk_rec");
303 depth++;
304
305 /* back up and get the data_size */
306
307 if ( !prs_set_offset( ps, prs_offset(ps)-sizeof(uint32)) )
308 return False;
309 start_off = prs_offset( ps );
310 if ( !prs_uint32( "rec_size", ps, depth, &nk->rec_size ))
311 return False;
312
313 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)nk->header, sizeof( nk->header )) )
314 return False;
315
316 if ( !prs_uint16( "key_type", ps, depth, &nk->key_type ))
317 return False;
318 if ( !smb_io_time( "mtime", &nk->mtime, ps, depth ))
319 return False;
320
321 if ( !prs_set_offset( ps, start+0x0010 ) )
322 return False;
323 if ( !prs_uint32( "parent_off", ps, depth, &nk->parent_off ))
324 return False;
325 if ( !prs_uint32( "num_subkeys", ps, depth, &nk->num_subkeys ))
326 return False;
327
328 if ( !prs_set_offset( ps, start+0x001c ) )
329 return False;
330 if ( !prs_uint32( "subkeys_off", ps, depth, &nk->subkeys_off ))
331 return False;
332 if ( !prs_uint32( "unknown_off", ps, depth, &unknown_off) )
333 return False;
334
335 if ( !prs_set_offset( ps, start+0x0024 ) )
336 return False;
337 if ( !prs_uint32( "num_values", ps, depth, &nk->num_values ))
338 return False;
339 if ( !prs_uint32( "values_off", ps, depth, &nk->values_off ))
340 return False;
341 if ( !prs_uint32( "sk_off", ps, depth, &nk->sk_off ))
342 return False;
343 if ( !prs_uint32( "classname_off", ps, depth, &nk->classname_off ))
344 return False;
345
346 if ( !prs_uint32( "max_bytes_subkeyname", ps, depth, &nk->max_bytes_subkeyname))
347 return False;
348 if ( !prs_uint32( "max_bytes_subkeyclassname", ps, depth, &nk->max_bytes_subkeyclassname))
349 return False;
350 if ( !prs_uint32( "max_bytes_valuename", ps, depth, &nk->max_bytes_valuename))
351 return False;
352 if ( !prs_uint32( "max_bytes_value", ps, depth, &nk->max_bytes_value))
353 return False;
354 if ( !prs_uint32( "unknown index", ps, depth, &nk->unk_index))
355 return False;
356
357 name_length = nk->keyname ? strlen(nk->keyname) : 0 ;
358 class_length = nk->classname ? strlen(nk->classname) : 0 ;
359 if ( !prs_uint16( "name_length", ps, depth, &name_length ))
360 return False;
361 if ( !prs_uint16( "class_length", ps, depth, &class_length ))
362 return False;
363
364 if ( class_length ) {
365 ;;
366 }
367
368 if ( name_length ) {
369 if ( UNMARSHALLING(ps) ) {
370 if ( !(nk->keyname = PRS_ALLOC_MEM( ps, char, name_length+1 )) )
371 return False;
372 }
373
374 if ( !prs_uint8s( True, "name", ps, depth, (uint8*)nk->keyname, name_length) )
375 return False;
376
377 if ( UNMARSHALLING(ps) )
378 nk->keyname[name_length] = '\0';
379 }
380
381 end_off = prs_offset( ps );
382
383 /* data_size must be divisible by 8 and large enough to hold the original record */
384
385 data_size = ((start_off - end_off) & 0xfffffff8 );
386 if ( data_size > nk->rec_size )
387 DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, nk->rec_size));
388
389 if ( MARSHALLING(ps) )
390 nk->hbin->dirty = True;
391
392 return True;
393 }
394
395 /*******************************************************************
396 *******************************************************************/
397
398 static uint32 regf_block_checksum( prs_struct *ps )
399 {
400 char *buffer = prs_data_p( ps );
401 uint32 checksum, x;
402 int i;
403
404 /* XOR of all bytes 0x0000 - 0x01FB */
405
406 checksum = x = 0;
407
408 for ( i=0; i<0x01FB; i+=4 ) {
409 x = IVAL(buffer, i );
410 checksum ^= x;
411 }
412
413 return checksum;
414 }
415
416 /*******************************************************************
417 *******************************************************************/
418
419 static BOOL read_regf_block( REGF_FILE *file )
420 {
421 prs_struct ps;
422 uint32 checksum;
423
424 /* grab the first block from the file */
425
426 if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) == -1 )
427 return False;
428
429 /* parse the block and verify the checksum */
430
431 if ( !prs_regf_block( "regf_header", &ps, 0, file ) )
432 return False;
433
434 checksum = regf_block_checksum( &ps );
435
436 prs_mem_free( &ps );
437
438 if ( file->checksum != checksum ) {
439 DEBUG(0,("read_regf_block: invalid checksum\n" ));
440 return False;
441 }
442
443 return True;
444 }
445
446 /*******************************************************************
447 *******************************************************************/
448
449 static REGF_HBIN* read_hbin_block( REGF_FILE *file, off_t offset )
450 {
451 REGF_HBIN *hbin;
452 uint32 record_size, curr_off, block_size, header;
453
454 if ( !(hbin = TALLOC_ZERO_P(file->mem_ctx, REGF_HBIN)) )
455 return NULL;
456 hbin->file_off = offset;
457 hbin->free_off = -1;
458
459 if ( read_block( file, &hbin->ps, offset, 0 ) == -1 )
460 return NULL;
461
462 if ( !prs_hbin_block( "hbin", &hbin->ps, 0, hbin ) )
463 return NULL;
464
465 /* this should be the same thing as hbin->block_size but just in case */
466
467 block_size = prs_data_size( &hbin->ps );
468
469 /* Find the available free space offset. Always at the end,
470 so walk the record list and stop when you get to the end.
471 The end is defined by a record header of 0xffffffff. The
472 previous 4 bytes contains the amount of free space remaining
473 in the hbin block. */
474
475 /* remember that the record_size is in the 4 bytes preceeding the record itself */
476
477 if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE-sizeof(uint32) ) )
478 return False;
479
480 record_size = 0;
481 header = 0;
482 curr_off = prs_offset( &hbin->ps );
483 while ( header != 0xffffffff ) {
484 /* not done yet so reset the current offset to the
485 next record_size field */
486
487 curr_off = curr_off+record_size;
488
489 /* for some reason the record_size of the last record in
490 an hbin block can extend past the end of the block
491 even though the record fits within the remaining
492 space....aaarrrgggghhhhhh */
493
494 if ( curr_off >= block_size ) {
495 record_size = -1;
496 curr_off = -1;
497 break;
498 }
499
500 if ( !prs_set_offset( &hbin->ps, curr_off) )
501 return False;
502
503 if ( !prs_uint32( "rec_size", &hbin->ps, 0, &record_size ) )
504 return False;
505 if ( !prs_uint32( "header", &hbin->ps, 0, &header ) )
506 return False;
507
508 SMB_ASSERT( record_size != 0 );
509
510 if ( record_size & 0x80000000 ) {
511 /* absolute_value(record_size) */
512 record_size = (record_size ^ 0xffffffff) + 1;
513 }
514 }
515
516 /* save the free space offset */
517
518 if ( header == 0xffffffff ) {
519
520 /* account for the fact that the curr_off is 4 bytes behind the actual
521 record header */
522
523 hbin->free_off = curr_off + sizeof(uint32);
524 hbin->free_size = record_size;
525 }
526
527 DEBUG(10,("read_hbin_block: free space offset == 0x%x\n", hbin->free_off));
528
529 if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE ) )
530 return False;
531
532 return hbin;
533 }
534
535 /*******************************************************************
536 Input a random offset and receive the corresponding HBIN
537 block for it
538 *******************************************************************/
539
540 static BOOL hbin_contains_offset( REGF_HBIN *hbin, uint32 offset )
541 {
542 if ( !hbin )
543 return False;
544
545 if ( (offset > hbin->first_hbin_off) && (offset < (hbin->first_hbin_off+hbin->block_size)) )
546 return True;
547
548 return False;
549 }
550
551 /*******************************************************************
552 Input a random offset and receive the corresponding HBIN
553 block for it
554 *******************************************************************/
555
556 static REGF_HBIN* lookup_hbin_block( REGF_FILE *file, uint32 offset )
557 {
558 REGF_HBIN *hbin = NULL;
559 uint32 block_off;
560
561 /* start with the open list */
562
563 for ( hbin=file->block_list; hbin; hbin=hbin->next ) {
564 DEBUG(10,("lookup_hbin_block: address = 0x%x [0x%lx]\n", hbin->file_off, (unsigned long)hbin ));
565 if ( hbin_contains_offset( hbin, offset ) )
566 return hbin;
567 }
568
569 if ( !hbin ) {
570 /* start at the beginning */
571
572 block_off = REGF_BLOCKSIZE;
573 do {
574 /* cleanup before the next round */
575 if ( hbin )
576 prs_mem_free( &hbin->ps );
577
578 hbin = read_hbin_block( file, block_off );
579
580 if ( hbin )
581 block_off = hbin->file_off + hbin->block_size;
582
583 } while ( hbin && !hbin_contains_offset( hbin, offset ) );
584 }
585
586 if ( hbin )
587 DLIST_ADD( file->block_list, hbin );
588
589 return hbin;
590 }
591
592 /*******************************************************************
593 *******************************************************************/
594
595 static BOOL prs_hash_rec( const char *desc, prs_struct *ps, int depth, REGF_HASH_REC *hash )
596 {
597 prs_debug(ps, depth, desc, "prs_hash_rec");
598 depth++;
599
600 if ( !prs_uint32( "nk_off", ps, depth, &hash->nk_off ))
601 return False;
602 if ( !prs_uint8s( True, "keycheck", ps, depth, hash->keycheck, sizeof( hash->keycheck )) )
603 return False;
604
605 return True;
606 }
607
608 /*******************************************************************
609 *******************************************************************/
610
611 static BOOL hbin_prs_lf_records( const char *desc, REGF_HBIN *hbin, int depth, REGF_NK_REC *nk )
612 {
613 int i;
614 REGF_LF_REC *lf = &nk->subkeys;
615 uint32 data_size, start_off, end_off;
616
617 prs_debug(&hbin->ps, depth, desc, "prs_lf_records");
618 depth++;
619
620 /* check if we have anything to do first */
621
622 if ( nk->num_subkeys == 0 )
623 return True;
624
625 /* move to the LF record */
626
627 if ( !prs_set_offset( &hbin->ps, nk->subkeys_off + HBIN_HDR_SIZE - hbin->first_hbin_off ) )
628 return False;
629
630 /* backup and get the data_size */
631
632 if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
633 return False;
634 start_off = prs_offset( &hbin->ps );
635 if ( !prs_uint32( "rec_size", &hbin->ps, depth, &lf->rec_size ))
636 return False;
637
638 if ( !prs_uint8s( True, "header", &hbin->ps, depth, (uint8*)lf->header, sizeof( lf->header )) )
639 return False;
640
641 if ( !prs_uint16( "num_keys", &hbin->ps, depth, &lf->num_keys))
642 return False;
643
644 if ( UNMARSHALLING(&hbin->ps) ) {
645 if ( !(lf->hashes = PRS_ALLOC_MEM( &hbin->ps, REGF_HASH_REC, lf->num_keys )) )
646 return False;
647 }
648
649 for ( i=0; i<lf->num_keys; i++ ) {
650 if ( !prs_hash_rec( "hash_rec", &hbin->ps, depth, &lf->hashes[i] ) )
651 return False;
652 }
653
654 end_off = prs_offset( &hbin->ps );
655
656 /* data_size must be divisible by 8 and large enough to hold the original record */
657
658 data_size = ((start_off - end_off) & 0xfffffff8 );
659 if ( data_size > lf->rec_size )
660 DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, lf->rec_size));
661
662 if ( MARSHALLING(&hbin->ps) )
663 hbin->dirty = True;
664
665 return True;
666 }
667
668 /*******************************************************************
669 *******************************************************************/
670
671 static BOOL hbin_prs_sk_rec( const char *desc, REGF_HBIN *hbin, int depth, REGF_SK_REC *sk )
672 {
673 prs_struct *ps = &hbin->ps;
674 uint16 tag = 0xFFFF;
675 uint32 data_size, start_off, end_off;
676
677
678 prs_debug(ps, depth, desc, "hbin_prs_sk_rec");
679 depth++;
680
681 if ( !prs_set_offset( &hbin->ps, sk->sk_off + HBIN_HDR_SIZE - hbin->first_hbin_off ) )
682 return False;
683
684 /* backup and get the data_size */
685
686 if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
687 return False;
688 start_off = prs_offset( &hbin->ps );
689 if ( !prs_uint32( "rec_size", &hbin->ps, depth, &sk->rec_size ))
690 return False;
691
692 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)sk->header, sizeof( sk->header )) )
693 return False;
694 if ( !prs_uint16( "tag", ps, depth, &tag))
695 return False;
696
697 if ( !prs_uint32( "prev_sk_off", ps, depth, &sk->prev_sk_off))
698 return False;
699 if ( !prs_uint32( "next_sk_off", ps, depth, &sk->next_sk_off))
700 return False;
701 if ( !prs_uint32( "ref_count", ps, depth, &sk->ref_count))
702 return False;
703 if ( !prs_uint32( "size", ps, depth, &sk->size))
704 return False;
705
706 if ( !sec_io_desc( "sec_desc", &sk->sec_desc, ps, depth ))
707 return False;
708
709 end_off = prs_offset( &hbin->ps );
710
711 /* data_size must be divisible by 8 and large enough to hold the original record */
712
713 data_size = ((start_off - end_off) & 0xfffffff8 );
714 if ( data_size > sk->rec_size )
715 DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, sk->rec_size));
716
717 if ( MARSHALLING(&hbin->ps) )
718 hbin->dirty = True;
719
720 return True;
721 }
722
723 /*******************************************************************
724 *******************************************************************/
725
726 static BOOL hbin_prs_vk_rec( const char *desc, REGF_HBIN *hbin, int depth, REGF_VK_REC *vk, REGF_FILE *file )
727 {
728 uint32 offset;
729 uint16 name_length;
730 prs_struct *ps = &hbin->ps;
731 uint32 data_size, start_off, end_off;
732
733 prs_debug(ps, depth, desc, "prs_vk_rec");
734 depth++;
735
736 /* backup and get the data_size */
737
738 if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
739 return False;
740 start_off = prs_offset( &hbin->ps );
741 if ( !prs_uint32( "rec_size", &hbin->ps, depth, &vk->rec_size ))
742 return False;
743
744 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)vk->header, sizeof( vk->header )) )
745 return False;
746
747 if ( MARSHALLING(&hbin->ps) )
748 name_length = strlen(vk->valuename);
749
750 if ( !prs_uint16( "name_length", ps, depth, &name_length ))
751 return False;
752 if ( !prs_uint32( "data_size", ps, depth, &vk->data_size ))
753 return False;
754 if ( !prs_uint32( "data_off", ps, depth, &vk->data_off ))
755 return False;
756 if ( !prs_uint32( "type", ps, depth, &vk->type))
757 return False;
758 if ( !prs_uint16( "flag", ps, depth, &vk->flag))
759 return False;
760
761 offset = prs_offset( ps );
762 offset += 2; /* skip 2 bytes */
763 prs_set_offset( ps, offset );
764
765 /* get the name */
766
767 if ( vk->flag&VK_FLAG_NAME_PRESENT ) {
768
769 if ( UNMARSHALLING(&hbin->ps) ) {
770 if ( !(vk->valuename = PRS_ALLOC_MEM( ps, char, name_length+1 )))
771 return False;
772 }
773 if ( !prs_uint8s( True, "name", ps, depth, (uint8*)vk->valuename, name_length ) )
774 return False;
775 }
776
777 end_off = prs_offset( &hbin->ps );
778
779 /* get the data if necessary */
780
781 if ( vk->data_size != 0 ) {
782 BOOL charmode = False;
783
784 if ( (vk->type == REG_SZ) || (vk->type == REG_MULTI_SZ) )
785 charmode = True;
786
787 /* the data is stored in the offset if the size <= 4 */
788
789 if ( !(vk->data_size & VK_DATA_IN_OFFSET) ) {
790 REGF_HBIN *hblock = hbin;
791 uint32 data_rec_size;
792
793 if ( UNMARSHALLING(&hbin->ps) ) {
794 if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8, vk->data_size) ) )
795 return False;
796 }
797
798 /* this data can be in another hbin */
799 if ( !hbin_contains_offset( hbin, vk->data_off ) ) {
800 if ( !(hblock = lookup_hbin_block( file, vk->data_off )) )
801 return False;
802 }
803 if ( !(prs_set_offset( &hblock->ps, (vk->data_off+HBIN_HDR_SIZE-hblock->first_hbin_off)-sizeof(uint32) )) )
804 return False;
805
806 if ( MARSHALLING(&hblock->ps) ) {
807 data_rec_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
808 data_rec_size = ( data_rec_size - 1 ) ^ 0xFFFFFFFF;
809 }
810 if ( !prs_uint32( "data_rec_size", &hblock->ps, depth, &data_rec_size ))
811 return False;
812 if ( !prs_uint8s( charmode, "data", &hblock->ps, depth, vk->data, vk->data_size) )
813 return False;
814
815 if ( MARSHALLING(&hblock->ps) )
816 hblock->dirty = True;
817 }
818 else {
819 if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8, 4 ) ) )
820 return False;
821 SIVAL( vk->data, 0, vk->data_off );
822 }
823
824 }
825
826 /* data_size must be divisible by 8 and large enough to hold the original record */
827
828 data_size = ((start_off - end_off ) & 0xfffffff8 );
829 if ( data_size != vk->rec_size )
830 DEBUG(10,("prs_vk_rec: data_size check failed (0x%x < 0x%x)\n", data_size, vk->rec_size));
831
832 if ( MARSHALLING(&hbin->ps) )
833 hbin->dirty = True;
834
835 return True;
836 }
837
838 /*******************************************************************
839 read a VK record which is contained in the HBIN block stored
840 in the prs_struct *ps.
841 *******************************************************************/
842
843 static BOOL hbin_prs_vk_records( const char *desc, REGF_HBIN *hbin, int depth, REGF_NK_REC *nk, REGF_FILE *file )
844 {
845 int i;
846 uint32 record_size;
847
848 prs_debug(&hbin->ps, depth, desc, "prs_vk_records");
849 depth++;
850
851 /* check if we have anything to do first */
852
853 if ( nk->num_values == 0 )
854 return True;
855
856 if ( UNMARSHALLING(&hbin->ps) ) {
857 if ( !(nk->values = PRS_ALLOC_MEM( &hbin->ps, REGF_VK_REC, nk->num_values ) ) )
858 return False;
859 }
860
861 /* convert the offset to something relative to this HBIN block */
862
863 if ( !prs_set_offset( &hbin->ps, nk->values_off+HBIN_HDR_SIZE-hbin->first_hbin_off-sizeof(uint32)) )
864 return False;
865
866 if ( MARSHALLING( &hbin->ps) ) {
867 record_size = ( ( nk->num_values * sizeof(uint32) ) & 0xfffffff8 ) + 8;
868 record_size = (record_size - 1) ^ 0xFFFFFFFF;
869 }
870
871 if ( !prs_uint32( "record_size", &hbin->ps, depth, &record_size ) )
872 return False;
873
874 for ( i=0; i<nk->num_values; i++ ) {
875 if ( !prs_uint32( "vk_off", &hbin->ps, depth, &nk->values[i].rec_off ) )
876 return False;
877 }
878
879 for ( i=0; i<nk->num_values; i++ ) {
880 REGF_HBIN *sub_hbin = hbin;
881 uint32 new_offset;
882
883 if ( !hbin_contains_offset( hbin, nk->values[i].rec_off ) ) {
884 sub_hbin = lookup_hbin_block( file, nk->values[i].rec_off );
885 if ( !sub_hbin ) {
886 DEBUG(0,("hbin_prs_vk_records: Failed to find HBIN block containing offset [0x%x]\n",
887 nk->values[i].hbin_off));
888 return False;
889 }
890 }
891
892 new_offset = nk->values[i].rec_off + HBIN_HDR_SIZE - sub_hbin->first_hbin_off;
893 if ( !prs_set_offset( &sub_hbin->ps, new_offset ) )
894 return False;
895 if ( !hbin_prs_vk_rec( "vk_rec", sub_hbin, depth, &nk->values[i], file ) )
896 return False;
897 }
898
899 if ( MARSHALLING(&hbin->ps) )
900 hbin->dirty = True;
901
902
903 return True;
904 }
905
906
907 /*******************************************************************
908 *******************************************************************/
909
910 static REGF_SK_REC* find_sk_record_by_offset( REGF_FILE *file, uint32 offset )
911 {
912 REGF_SK_REC *p_sk;
913
914 for ( p_sk=file->sec_desc_list; p_sk; p_sk=p_sk->next ) {
915 if ( p_sk->sk_off == offset )
916 return p_sk;
917 }
918
919 return NULL;
920 }
921
922 /*******************************************************************
923 *******************************************************************/
924
925 static REGF_SK_REC* find_sk_record_by_sec_desc( REGF_FILE *file, SEC_DESC *sd )
926 {
927 REGF_SK_REC *p;
928
929 for ( p=file->sec_desc_list; p; p=p->next ) {
930 if ( sec_desc_equal( p->sec_desc, sd ) )
931 return p;
932 }
933
934 /* failure */
935
936 return NULL;
937 }
938
939 /*******************************************************************
940 *******************************************************************/
941
942 static BOOL hbin_prs_key( REGF_FILE *file, REGF_HBIN *hbin, REGF_NK_REC *nk )
943 {
944 int depth = 0;
945 REGF_HBIN *sub_hbin;
946
947 prs_debug(&hbin->ps, depth, "", "fetch_key");
948 depth++;
949
950 /* get the initial nk record */
951
952 if ( !prs_nk_rec( "nk_rec", &hbin->ps, depth, nk ))
953 return False;
954
955 /* fill in values */
956
957 if ( nk->num_values && (nk->values_off!=REGF_OFFSET_NONE) ) {
958 sub_hbin = hbin;
959 if ( !hbin_contains_offset( hbin, nk->values_off ) ) {
960 sub_hbin = lookup_hbin_block( file, nk->values_off );
961 if ( !sub_hbin ) {
962 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing value_list_offset [0x%x]\n",
963 nk->values_off));
964 return False;
965 }
966 }
967
968 if ( !hbin_prs_vk_records( "vk_rec", sub_hbin, depth, nk, file ))
969 return False;
970 }
971
972 /* now get subkeys */
973
974 if ( nk->num_subkeys && (nk->subkeys_off!=REGF_OFFSET_NONE) ) {
975 sub_hbin = hbin;
976 if ( !hbin_contains_offset( hbin, nk->subkeys_off ) ) {
977 sub_hbin = lookup_hbin_block( file, nk->subkeys_off );
978 if ( !sub_hbin ) {
979 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing subkey_offset [0x%x]\n",
980 nk->subkeys_off));
981 return False;
982 }
983 }
984
985 if ( !hbin_prs_lf_records( "lf_rec", sub_hbin, depth, nk ))
986 return False;
987 }
988
989 /* get the to the security descriptor. First look if we have already parsed it */
990
991 if ( (nk->sk_off!=REGF_OFFSET_NONE) && !( nk->sec_desc = find_sk_record_by_offset( file, nk->sk_off )) ) {
992
993 sub_hbin = hbin;
994 if ( !hbin_contains_offset( hbin, nk->sk_off ) ) {
995 sub_hbin = lookup_hbin_block( file, nk->sk_off );
996 if ( !sub_hbin ) {
997 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing sk_offset [0x%x]\n",
998 nk->subkeys_off));
999 return False;
1000 }
1001 }
1002
1003 if ( !(nk->sec_desc = TALLOC_ZERO_P( file->mem_ctx, REGF_SK_REC )) )
1004 return False;
1005 nk->sec_desc->sk_off = nk->sk_off;
1006 if ( !hbin_prs_sk_rec( "sk_rec", sub_hbin, depth, nk->sec_desc ))
1007 return False;
1008
1009 /* add to the list of security descriptors (ref_count has been read from the files) */
1010
1011 nk->sec_desc->sk_off = nk->sk_off;
1012 DLIST_ADD( file->sec_desc_list, nk->sec_desc );
1013 }
1014
1015 return True;
1016 }
1017
1018 /*******************************************************************
1019 *******************************************************************/
1020
1021 static BOOL next_record( REGF_HBIN *hbin, const char *hdr, BOOL *eob )
1022 {
1023 uint8 header[REC_HDR_SIZE];
1024 uint32 record_size;
1025 uint32 curr_off, block_size;
1026 BOOL found = False;
1027 prs_struct *ps = &hbin->ps;
1028
1029 curr_off = prs_offset( ps );
1030 if ( curr_off == 0 )
1031 prs_set_offset( ps, HBIN_HEADER_REC_SIZE );
1032
1033 /* assume that the current offset is at the record header
1034 and we need to backup to read the record size */
1035
1036 curr_off -= sizeof(uint32);
1037
1038 block_size = prs_data_size( ps );
1039 record_size = 0;
1040 memset( header, 0x0, sizeof(uint8)*REC_HDR_SIZE );
1041 while ( !found ) {
1042
1043 curr_off = curr_off+record_size;
1044 if ( curr_off >= block_size )
1045 break;
1046
1047 if ( !prs_set_offset( &hbin->ps, curr_off) )
1048 return False;
1049
1050 if ( !prs_uint32( "record_size", ps, 0, &record_size ) )
1051 return False;
1052 if ( !prs_uint8s( True, "header", ps, 0, header, REC_HDR_SIZE ) )
1053 return False;
1054
1055 if ( record_size & 0x80000000 ) {
1056 /* absolute_value(record_size) */
1057 record_size = (record_size ^ 0xffffffff) + 1;
1058 }
1059
1060 if ( memcmp( header, hdr, REC_HDR_SIZE ) == 0 ) {
1061 found = True;
1062 curr_off += sizeof(uint32);
1063 }
1064 }
1065
1066 /* mark prs_struct as done ( at end ) if no more SK records */
1067 /* mark end-of-block as True */
1068
1069 if ( !found ) {
1070 prs_set_offset( &hbin->ps, prs_data_size(&hbin->ps) );
1071 *eob = True;
1072 return False;
1073 }
1074
1075 if ( !prs_set_offset( ps, curr_off ) )
1076 return False;
1077
1078 return True;
1079 }
1080
1081 /*******************************************************************
1082 *******************************************************************/
1083
1084 static BOOL next_nk_record( REGF_FILE *file, REGF_HBIN *hbin, REGF_NK_REC *nk, BOOL *eob )
1085 {
1086 if ( next_record( hbin, "nk", eob ) && hbin_prs_key( file, hbin, nk ) )
1087 return True;
1088
1089 return False;
1090 }
1091
1092 /*******************************************************************
1093 Intialize the newly created REGF_BLOCK in *file and write the
1094 block header to disk
1095 *******************************************************************/
1096
1097 static BOOL init_regf_block( REGF_FILE *file )
1098 {
1099 prs_struct ps;
1100 BOOL result = True;
1101
1102 if ( !prs_init( &ps, REGF_BLOCKSIZE, file->mem_ctx, MARSHALL ) )
1103 return False;
1104
1105 memcpy( file->header, "regf", REGF_HDR_SIZE );
1106 file->data_offset = 0x20;
1107 file->last_block = 0x1000;
1108
1109 /* set mod time */
1110
1111 unix_to_nt_time( &file->mtime, time(NULL) );
1112
1113 /* hard coded values...no diea what these are ... maybe in time */
1114
1115 file->unknown1 = 0x2;
1116 file->unknown2 = 0x1;
1117 file->unknown3 = 0x3;
1118 file->unknown4 = 0x0;
1119 file->unknown5 = 0x1;
1120 file->unknown6 = 0x1;
1121
1122 /* write header to the buffer */
1123
1124 if ( !prs_regf_block( "regf_header", &ps, 0, file ) ) {
1125 result = False;
1126 goto out;
1127 }
1128
1129 /* calculate the checksum, re-marshall data (to include the checksum)
1130 and write to disk */
1131
1132 file->checksum = regf_block_checksum( &ps );
1133 prs_set_offset( &ps, 0 );
1134 if ( !prs_regf_block( "regf_header", &ps, 0, file ) ) {
1135 result = False;
1136 goto out;
1137 }
1138
1139 if ( write_block( file, &ps, 0 ) == -1 ) {
1140 DEBUG(0,("init_regf_block: Failed to initialize registry header block!\n"));
1141 result = False;
1142 goto out;
1143 }
1144
1145 out:
1146 prs_mem_free( &ps );
1147
1148 return result;
1149 }
1150 /*******************************************************************
1151 Open the registry file and then read in the REGF block to get the
1152 first hbin offset.
1153 *******************************************************************/
1154
1155 REGF_FILE* regfio_open( const char *filename, int flags, int mode )
1156 {
1157 REGF_FILE *rb;
1158
1159 if ( !(rb = SMB_MALLOC_P(REGF_FILE)) ) {
1160 DEBUG(0,("ERROR allocating memory\n"));
1161 return NULL;
1162 }
1163 ZERO_STRUCTP( rb );
1164 rb->fd = -1;
1165
1166 if ( !(rb->mem_ctx = talloc_init( "read_regf_block" )) ) {
1167 regfio_close( rb );
1168 return NULL;
1169 }
1170
1171 rb->open_flags = flags;
1172
1173 /* open and existing file */
1174
1175 if ( (rb->fd = open(filename, flags, mode)) == -1 ) {
1176 DEBUG(0,("regfio_open: failure to open %s (%s)\n", filename, strerror(errno)));
1177 regfio_close( rb );
1178 return NULL;
1179 }
1180
1181 /* check if we are creating a new file or overwriting an existing one */
1182
1183 if ( flags & (O_CREAT|O_TRUNC) ) {
1184 if ( !init_regf_block( rb ) ) {
1185 DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));
1186 regfio_close( rb );
1187 return NULL;
1188 }
1189
1190 /* success */
1191 return rb;
1192 }
1193
1194 /* read in an existing file */
1195
1196 if ( !read_regf_block( rb ) ) {
1197 DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));
1198 regfio_close( rb );
1199 return NULL;
1200 }
1201
1202 /* success */
1203
1204 return rb;
1205 }
1206
1207 /*******************************************************************
1208 *******************************************************************/
1209
1210 static void regfio_mem_free( REGF_FILE *file )
1211 {
1212 /* free any talloc()'d memory */
1213
1214 if ( file && file->mem_ctx )
1215 talloc_destroy( file->mem_ctx );
1216 }
1217
1218 /*******************************************************************
1219 *******************************************************************/
1220
1221 int regfio_close( REGF_FILE *file )
1222 {
1223 int fd;
1224
1225 /* cleanup for a file opened for write */
1226
1227 if ( file->open_flags & (O_WRONLY|O_RDWR) ) {
1228 prs_struct ps;
1229 REGF_SK_REC *sk;
1230
1231 /* write of sd list */
1232
1233 for ( sk=file->sec_desc_list; sk; sk=sk->next ) {
1234 hbin_prs_sk_rec( "sk_rec", sk->hbin, 0, sk );
1235 }
1236
1237 /* flush any dirty blocks */
1238
1239 while ( file->block_list ) {
1240 hbin_block_close( file, file->block_list );
1241 }
1242
1243 ZERO_STRUCT( ps );
1244
1245 unix_to_nt_time( &file->mtime, time(NULL) );
1246
1247 if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) != -1 ) {
1248 /* now use for writing */
1249 prs_switch_type( &ps, MARSHALL );
1250
1251 /* stream the block once, generate the checksum,
1252 and stream it again */
1253 prs_set_offset( &ps, 0 );
1254 prs_regf_block( "regf_blocK", &ps, 0, file );
1255 file->checksum = regf_block_checksum( &ps );
1256 prs_set_offset( &ps, 0 );
1257 prs_regf_block( "regf_blocK", &ps, 0, file );
1258
1259 /* now we are ready to write it to disk */
1260 if ( write_block( file, &ps, 0 ) == -1 )
1261 DEBUG(0,("regfio_close: failed to update the regf header block!\n"));
1262 }
1263
1264 prs_mem_free( &ps );
1265 }
1266
1267 regfio_mem_free( file );
1268
1269 /* nothing tdo do if there is no open file */
1270
1271 if ( !file || (file->fd == -1) )
1272 return 0;
1273
1274 fd = file->fd;
1275 file->fd = -1;
1276 SAFE_FREE( file );
1277
1278 return close( fd );
1279 }
1280
1281 /*******************************************************************
1282 *******************************************************************/
1283
1284 static void regfio_flush( REGF_FILE *file )
1285 {
1286 REGF_HBIN *hbin;
1287
1288 for ( hbin=file->block_list; hbin; hbin=hbin->next ) {
1289 write_hbin_block( file, hbin );
1290 }
1291 }
1292
1293 /*******************************************************************
1294 There should be only *one* root key in the registry file based
1295 on my experience. --jerry
1296 *******************************************************************/
1297
1298 REGF_NK_REC* regfio_rootkey( REGF_FILE *file )
1299 {
1300 REGF_NK_REC *nk;
1301 REGF_HBIN *hbin;
1302 uint32 offset = REGF_BLOCKSIZE;
1303 BOOL found = False;
1304 BOOL eob;
1305
1306 if ( !file )
1307 return NULL;
1308
1309 if ( !(nk = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) ) {
1310 DEBUG(0,("regfio_rootkey: talloc() failed!\n"));
1311 return NULL;
1312 }
1313
1314 /* scan through the file on HBIN block at a time looking
1315 for an NK record with a type == 0x002c.
1316 Normally this is the first nk record in the first hbin
1317 block (but I'm not assuming that for now) */
1318
1319 while ( (hbin = read_hbin_block( file, offset )) ) {
1320 eob = False;
1321
1322 while ( !eob) {
1323 if ( next_nk_record( file, hbin, nk, &eob ) ) {
1324 if ( nk->key_type == NK_TYPE_ROOTKEY ) {
1325 found = True;
1326 break;
1327 }
1328 }
1329 prs_mem_free( &hbin->ps );
1330 }
1331
1332 if ( found )
1333 break;
1334
1335 offset += hbin->block_size;
1336 }
1337
1338 if ( !found ) {
1339 DEBUG(0,("regfio_rootkey: corrupt registry file ? No root key record located\n"));
1340 return NULL;
1341 }
1342
1343 DLIST_ADD( file->block_list, hbin );
1344
1345 return nk;
1346 }
1347
1348 /*******************************************************************
1349 This acts as an interator over the subkeys defined for a given
1350 NK record. Remember that offsets are from the *first* HBIN block.
1351 *******************************************************************/
1352
1353 REGF_NK_REC* regfio_fetch_subkey( REGF_FILE *file, REGF_NK_REC *nk )
1354 {
1355 REGF_NK_REC *subkey;
1356 REGF_HBIN *hbin;
1357 uint32 nk_offset;
1358
1359 /* see if there is anything left to report */
1360
1361 if ( !nk || (nk->subkeys_off==REGF_OFFSET_NONE) || (nk->subkey_index >= nk->num_subkeys) )
1362 return NULL;
1363
1364 /* find the HBIN block which should contain the nk record */
1365
1366 if ( !(hbin = lookup_hbin_block( file, nk->subkeys.hashes[nk->subkey_index].nk_off )) ) {
1367 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing offset [0x%x]\n",
1368 nk->subkeys.hashes[nk->subkey_index].nk_off));
1369 return NULL;
1370 }
1371
1372 nk_offset = nk->subkeys.hashes[nk->subkey_index].nk_off;
1373 if ( !prs_set_offset( &hbin->ps, (HBIN_HDR_SIZE + nk_offset - hbin->first_hbin_off) ) )
1374 return NULL;
1375
1376 nk->subkey_index++;
1377 if ( !(subkey = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) )
1378 return NULL;
1379
1380 if ( !hbin_prs_key( file, hbin, subkey ) )
1381 return NULL;
1382
1383 return subkey;
1384 }
1385
1386
1387 /*******************************************************************
1388 *******************************************************************/
1389
1390 static REGF_HBIN* regf_hbin_allocate( REGF_FILE *file, uint32 block_size )
1391 {
1392 REGF_HBIN *hbin;
1393 SMB_STRUCT_STAT sbuf;
1394
1395 if ( !(hbin = TALLOC_ZERO_P( file->mem_ctx, REGF_HBIN )) )
1396 return NULL;
1397
1398 memcpy( hbin->header, "hbin", sizeof(HBIN_HDR_SIZE) );
1399
1400
1401 if ( sys_fstat( file->fd, &sbuf ) ) {
1402 DEBUG(0,("regf_hbin_allocate: stat() failed! (%s)\n", strerror(errno)));
1403 return NULL;
1404 }
1405
1406 hbin->file_off = sbuf.st_size;
1407
1408 hbin->free_off = HBIN_HEADER_REC_SIZE;
1409 hbin->free_size = block_size - hbin->free_off + sizeof(uint32);;
1410
1411 hbin->block_size = block_size;
1412 hbin->first_hbin_off = hbin->file_off - REGF_BLOCKSIZE;
1413
1414 if ( !prs_init( &hbin->ps, block_size, file->mem_ctx, MARSHALL ) )
1415 return NULL;
1416
1417 if ( !prs_hbin_block( "new_hbin", &hbin->ps, 0, hbin ) )
1418 return NULL;
1419
1420 if ( !write_hbin_block( file, hbin ) )
1421 return NULL;
1422
1423 file->last_block = hbin->file_off;
1424
1425 return hbin;
1426 }
1427
1428 /*******************************************************************
1429 *******************************************************************/
1430
1431 static void update_free_space( REGF_HBIN *hbin, uint32 size_used )
1432 {
1433 hbin->free_off += size_used;
1434 hbin->free_size -= size_used;
1435
1436 if ( hbin->free_off >= hbin->block_size ) {
1437 hbin->free_off = REGF_OFFSET_NONE;
1438 }
1439
1440 return;
1441 }
1442
1443 /*******************************************************************
1444 *******************************************************************/
1445
1446 static REGF_HBIN* find_free_space( REGF_FILE *file, uint32 size )
1447 {
1448 REGF_HBIN *hbin, *p_hbin;
1449 uint32 block_off;
1450 BOOL cached;
1451
1452 /* check open block list */
1453
1454 for ( hbin=file->block_list; hbin!=NULL; hbin=hbin->next ) {
1455 /* only check blocks that actually have available space */
1456
1457 if ( hbin->free_off == REGF_OFFSET_NONE )
1458 continue;
1459
1460 /* check for a large enough available chunk */
1461
1462 if ( (hbin->block_size - hbin->free_off) >= size ) {
1463 DLIST_PROMOTE( file->block_list, hbin );
1464 goto done;
1465 }
1466 }
1467
1468 /* parse the file until we find a block with
1469 enough free space; save the last non-filled hbin */
1470
1471 block_off = REGF_BLOCKSIZE;
1472 do {
1473 /* cleanup before the next round */
1474 cached = False;
1475 if ( hbin )
1476 prs_mem_free( &hbin->ps );
1477
1478 hbin = read_hbin_block( file, block_off );
1479
1480 if ( hbin ) {
1481
1482 /* make sure that we don't already have this block in memory */
1483
1484 for ( p_hbin=file->block_list; p_hbin!=NULL; p_hbin=p_hbin->next ) {
1485 if ( p_hbin->file_off == hbin->file_off ) {
1486 cached = True;
1487 break;
1488 }
1489 }
1490
1491 block_off = hbin->file_off + hbin->block_size;
1492
1493 if ( cached ) {
1494 prs_mem_free( &hbin->ps );
1495 hbin = NULL;
1496 continue;
1497 }
1498 }
1499 /* if (cached block or (new block and not enough free space)) then continue looping */
1500 } while ( cached || (hbin && (hbin->free_size < size)) );
1501
1502 /* no free space; allocate a new one */
1503
1504 if ( !hbin ) {
1505 uint32 alloc_size;
1506
1507 /* allocate in multiples of REGF_ALLOC_BLOCK; make sure (size + hbin_header) fits */
1508
1509 alloc_size = (((size+HBIN_HEADER_REC_SIZE) / REGF_ALLOC_BLOCK ) + 1 ) * REGF_ALLOC_BLOCK;
1510
1511 if ( !(hbin = regf_hbin_allocate( file, alloc_size )) ) {
1512 DEBUG(0,("find_free_space: regf_hbin_allocate() failed!\n"));
1513 return NULL;
1514 }
1515 DLIST_ADD( file->block_list, hbin );
1516 }
1517
1518 done:
1519 /* set the offset to be ready to write */
1520
1521 if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32) ) )
1522 return NULL;
1523
1524 /* write the record size as a placeholder for now, it should be
1525 probably updated by the caller once it all of the data necessary
1526 for the record */
1527
1528 if ( !prs_uint32("allocated_size", &hbin->ps, 0, &size) )
1529 return False;
1530
1531 update_free_space( hbin, size );
1532
1533 return hbin;
1534 }
1535
1536 /*******************************************************************
1537 *******************************************************************/
1538
1539 static uint32 sk_record_data_size( SEC_DESC * sd )
1540 {
1541 uint32 size, size_mod8;
1542
1543 size_mod8 = 0;
1544
1545 /* the record size is sizeof(hdr) + name + static members + data_size_field */
1546
1547 size = sizeof(uint32)*5 + sec_desc_size( sd ) + sizeof(uint32);
1548
1549 /* multiple of 8 */
1550 size_mod8 = size & 0xfffffff8;
1551 if ( size_mod8 < size )
1552 size_mod8 += 8;
1553
1554 return size_mod8;
1555 }
1556
1557 /*******************************************************************
1558 *******************************************************************/
1559
1560 static uint32 vk_record_data_size( REGF_VK_REC *vk )
1561 {
1562 uint32 size, size_mod8;
1563
1564 size_mod8 = 0;
1565
1566 /* the record size is sizeof(hdr) + name + static members + data_size_field */
1567
1568 size = REC_HDR_SIZE + (sizeof(uint16)*3) + (sizeof(uint32)*3) + sizeof(uint32);
1569
1570 if ( vk->valuename )
1571 size += strlen(vk->valuename);
1572
1573 /* multiple of 8 */
1574 size_mod8 = size & 0xfffffff8;
1575 if ( size_mod8 < size )
1576 size_mod8 += 8;
1577
1578 return size_mod8;
1579 }
1580
1581 /*******************************************************************
1582 *******************************************************************/
1583
1584 static uint32 lf_record_data_size( uint32 num_keys )
1585 {
1586 uint32 size, size_mod8;
1587
1588 size_mod8 = 0;
1589
1590 /* the record size is sizeof(hdr) + num_keys + sizeof of hash_array + data_size_uint32 */
1591
1592 size = REC_HDR_SIZE + sizeof(uint16) + (sizeof(REGF_HASH_REC) * num_keys) + sizeof(uint32);
1593
1594 /* multiple of 8 */
1595 size_mod8 = size & 0xfffffff8;
1596 if ( size_mod8 < size )
1597 size_mod8 += 8;
1598
1599 return size_mod8;
1600 }
1601
1602 /*******************************************************************
1603 *******************************************************************/
1604
1605 static uint32 nk_record_data_size( REGF_NK_REC *nk )
1606 {
1607 uint32 size, size_mod8;
1608
1609 size_mod8 = 0;
1610
1611 /* the record size is static + length_of_keyname + length_of_classname + data_size_uint32 */
1612
1613 size = 0x4c + strlen(nk->keyname) + sizeof(uint32);
1614
1615 if ( nk->classname )
1616 size += strlen( nk->classname );
1617
1618 /* multiple of 8 */
1619 size_mod8 = size & 0xfffffff8;
1620 if ( size_mod8 < size )
1621 size_mod8 += 8;
1622
1623 return size_mod8;
1624 }
1625
1626 /*******************************************************************
1627 *******************************************************************/
1628
1629 static BOOL create_vk_record( REGF_FILE *file, REGF_VK_REC *vk, REGISTRY_VALUE *value )
1630 {
1631 char *name = regval_name(value);
1632 REGF_HBIN *data_hbin;
1633
1634 ZERO_STRUCTP( vk );
1635
1636 memcpy( vk->header, "vk", REC_HDR_SIZE );
1637
1638 if ( name ) {
1639 vk->valuename = talloc_strdup( file->mem_ctx, regval_name(value) );
1640 vk->flag = VK_FLAG_NAME_PRESENT;
1641 }
1642
1643 vk->data_size = regval_size( value );
1644 vk->type = regval_type( value );
1645
1646 if ( vk->data_size > sizeof(uint32) ) {
1647 uint32 data_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
1648
1649 vk->data = (uint8 *)TALLOC_MEMDUP( file->mem_ctx,
1650 regval_data_p(value),
1651 vk->data_size );
1652 if (vk->data == NULL) {
1653 return False;
1654 }
1655
1656 /* go ahead and store the offset....we'll pick this hbin block back up when
1657 we stream the data */
1658
1659 if ((data_hbin = find_free_space(file, data_size )) == NULL) {
1660 return False;
1661 }
1662 vk->data_off = prs_offset( &data_hbin->ps ) + data_hbin->first_hbin_off - HBIN_HDR_SIZE;
1663 }
1664 else {
1665 /* make sure we don't try to copy from a NULL value pointer */
1666
1667 if ( vk->data_size != 0 )
1668 memcpy( &vk->data_off, regval_data_p(value), sizeof(uint32) );
1669 vk->data_size |= VK_DATA_IN_OFFSET;
1670 }
1671
1672 return True;
1673 }
1674
1675 /*******************************************************************
1676 *******************************************************************/
1677
1678 static int hashrec_cmp( REGF_HASH_REC *h1, REGF_HASH_REC *h2 )
1679 {
1680 return StrCaseCmp( h1->fullname, h2->fullname );
1681 }
1682
1683 /*******************************************************************
1684 *******************************************************************/
1685
1686 REGF_NK_REC* regfio_write_key( REGF_FILE *file, const char *name,
1687 REGVAL_CTR *values, REGSUBKEY_CTR *subkeys,
1688 SEC_DESC *sec_desc, REGF_NK_REC *parent )
1689 {
1690 REGF_NK_REC *nk;
1691 REGF_HBIN *vlist_hbin = NULL;
1692 uint32 size;
1693
1694 if ( !(nk = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) )
1695 return NULL;
1696
1697 memcpy( nk->header, "nk", REC_HDR_SIZE );
1698
1699 if ( !parent )
1700 nk->key_type = NK_TYPE_ROOTKEY;
1701 else
1702 nk->key_type = NK_TYPE_NORMALKEY;
1703
1704 /* store the parent offset (or -1 if a the root key */
1705
1706 nk->parent_off = parent ? (parent->hbin_off + parent->hbin->file_off - REGF_BLOCKSIZE - HBIN_HDR_SIZE ) : REGF_OFFSET_NONE;
1707
1708 /* no classname currently */
1709
1710 nk->classname_off = REGF_OFFSET_NONE;
1711 nk->classname = NULL;
1712 nk->keyname = talloc_strdup( file->mem_ctx, name );
1713
1714 /* current modification time */
1715
1716 unix_to_nt_time( &nk->mtime, time(NULL) );
1717
1718 /* allocate the record on disk */
1719
1720 size = nk_record_data_size( nk );
1721 nk->rec_size = ( size - 1 ) ^ 0XFFFFFFFF;
1722 if ((nk->hbin = find_free_space( file, size )) == NULL) {
1723 return NULL;
1724 }
1725 nk->hbin_off = prs_offset( &nk->hbin->ps );
1726
1727 /* Update the hash record in the parent */
1728
1729 if ( parent ) {
1730 REGF_HASH_REC *hash = &parent->subkeys.hashes[parent->subkey_index];
1731
1732 hash->nk_off = prs_offset( &nk->hbin->ps ) + nk->hbin->first_hbin_off - HBIN_HDR_SIZE;
1733 memcpy( hash->keycheck, name, sizeof(uint32) );
1734 hash->fullname = talloc_strdup( file->mem_ctx, name );
1735 parent->subkey_index++;
1736
1737 /* sort the list by keyname */
1738
1739 qsort( parent->subkeys.hashes, parent->subkey_index, sizeof(REGF_HASH_REC), QSORT_CAST hashrec_cmp );
1740
1741 if ( !hbin_prs_lf_records( "lf_rec", parent->subkeys.hbin, 0, parent ) )
1742 return False;
1743 }
1744
1745 /* write the security descriptor */
1746
1747 nk->sk_off = REGF_OFFSET_NONE;
1748 if ( sec_desc ) {
1749 uint32 sk_size = sk_record_data_size( sec_desc );
1750 REGF_HBIN *sk_hbin;
1751
1752 /* search for it in the existing list of sd's */
1753
1754 if ( (nk->sec_desc = find_sk_record_by_sec_desc( file, sec_desc )) == NULL ) {
1755 /* not found so add it to the list */
1756
1757 if (!(sk_hbin = find_free_space( file, sk_size ))) {
1758 return NULL;
1759 }
1760
1761 if ( !(nk->sec_desc = TALLOC_ZERO_P( file->mem_ctx, REGF_SK_REC )) )
1762 return NULL;
1763
1764 /* now we have to store the security descriptor in the list and
1765 update the offsets */
1766
1767 memcpy( nk->sec_desc->header, "sk", REC_HDR_SIZE );
1768 nk->sec_desc->hbin = sk_hbin;
1769 nk->sec_desc->hbin_off = prs_offset( &sk_hbin->ps );
1770 nk->sec_desc->sk_off = prs_offset( &sk_hbin->ps ) + sk_hbin->first_hbin_off - HBIN_HDR_SIZE;
1771 nk->sec_desc->rec_size = (sk_size-1) ^ 0xFFFFFFFF;
1772
1773 nk->sec_desc->sec_desc = sec_desc;
1774 nk->sec_desc->ref_count = 0;
1775
1776 /* size value must be self-inclusive */
1777 nk->sec_desc->size = sec_desc_size(sec_desc) + sizeof(uint32);
1778
1779 DLIST_ADD_END( file->sec_desc_list, nk->sec_desc, REGF_SK_REC *);
1780
1781 /* update the offsets for us and the previous sd in the list.
1782 if this is the first record, then just set the next and prev
1783 offsets to ourself. */
1784
1785 if ( nk->sec_desc->prev ) {
1786 REGF_SK_REC *prev = nk->sec_desc->prev;
1787
1788 nk->sec_desc->prev_sk_off = prev->hbin_off + prev->hbin->first_hbin_off - HBIN_HDR_SIZE;
1789 prev->next_sk_off = nk->sec_desc->sk_off;
1790
1791 /* the end must loop around to the front */
1792 nk->sec_desc->next_sk_off = file->sec_desc_list->sk_off;
1793
1794 /* and first must loop around to the tail */
1795 file->sec_desc_list->prev_sk_off = nk->sec_desc->sk_off;
1796 } else {
1797 nk->sec_desc->prev_sk_off = nk->sec_desc->sk_off;
1798 nk->sec_desc->next_sk_off = nk->sec_desc->sk_off;
1799 }
1800 }
1801
1802 /* bump the reference count +1 */
1803
1804 nk->sk_off = nk->sec_desc->sk_off;
1805 nk->sec_desc->ref_count++;
1806 }
1807
1808 /* write the subkeys */
1809
1810 nk->subkeys_off = REGF_OFFSET_NONE;
1811 if ( (nk->num_subkeys = regsubkey_ctr_numkeys( subkeys )) != 0 ) {
1812 uint32 lf_size = lf_record_data_size( nk->num_subkeys );
1813 uint32 namelen;
1814 int i;
1815
1816 if (!(nk->subkeys.hbin = find_free_space( file, lf_size ))) {
1817 return NULL;
1818 }
1819 nk->subkeys.hbin_off = prs_offset( &nk->subkeys.hbin->ps );
1820 nk->subkeys.rec_size = (lf_size-1) ^ 0xFFFFFFFF;
1821 nk->subkeys_off = prs_offset( &nk->subkeys.hbin->ps ) + nk->subkeys.hbin->first_hbin_off - HBIN_HDR_SIZE;
1822
1823 memcpy( nk->subkeys.header, "lf", REC_HDR_SIZE );
1824
1825 nk->subkeys.num_keys = nk->num_subkeys;
1826 if ( !(nk->subkeys.hashes = TALLOC_ZERO_ARRAY( file->mem_ctx, REGF_HASH_REC, nk->subkeys.num_keys )) )
1827 return NULL;
1828 nk->subkey_index = 0;
1829
1830 /* update the max_bytes_subkey{name,classname} fields */
1831 for ( i=0; i<nk->num_subkeys; i++ ) {
1832 namelen = strlen( regsubkey_ctr_specific_key(subkeys, i) );
1833 if ( namelen*2 > nk->max_bytes_subkeyname )
1834 nk->max_bytes_subkeyname = namelen * 2;
1835 }
1836 }
1837
1838 /* write the values */
1839
1840 nk->values_off = REGF_OFFSET_NONE;
1841 if ( (nk->num_values = regval_ctr_numvals( values )) != 0 ) {
1842 uint32 vlist_size = ( ( nk->num_values * sizeof(uint32) ) & 0xfffffff8 ) + 8;
1843 int i;
1844
1845 if (!(vlist_hbin = find_free_space( file, vlist_size ))) {
1846 return NULL;
1847 }
1848 nk->values_off = prs_offset( &vlist_hbin->ps ) + vlist_hbin->first_hbin_off - HBIN_HDR_SIZE;
1849
1850 if ( !(nk->values = TALLOC_ARRAY( file->mem_ctx, REGF_VK_REC, nk->num_values )) )
1851 return NULL;
1852
1853 /* create the vk records */
1854
1855 for ( i=0; i<nk->num_values; i++ ) {
1856 uint32 vk_size, namelen, datalen;
1857 REGISTRY_VALUE *r;
1858
1859 r = regval_ctr_specific_value( values, i );
1860 create_vk_record( file, &nk->values[i], r );
1861 vk_size = vk_record_data_size( &nk->values[i] );
1862 nk->values[i].hbin = find_free_space( file, vk_size );
1863 nk->values[i].hbin_off = prs_offset( &nk->values[i].hbin->ps );
1864 nk->values[i].rec_size = ( vk_size - 1 ) ^ 0xFFFFFFFF;
1865 nk->values[i].rec_off = prs_offset( &nk->values[i].hbin->ps )
1866 + nk->values[i].hbin->first_hbin_off
1867 - HBIN_HDR_SIZE;
1868
1869 /* update the max bytes fields if necessary */
1870
1871 namelen = strlen( regval_name(r) );
1872 if ( namelen*2 > nk->max_bytes_valuename )
1873 nk->max_bytes_valuename = namelen * 2;
1874
1875 datalen = regval_size( r );
1876 if ( datalen > nk->max_bytes_value )
1877 nk->max_bytes_value = datalen;
1878 }
1879 }
1880
1881 /* stream the records */
1882
1883 prs_set_offset( &nk->hbin->ps, nk->hbin_off );
1884 if ( !prs_nk_rec( "nk_rec", &nk->hbin->ps, 0, nk ) )
1885 return False;
1886
1887 if ( nk->num_values ) {
1888 if ( !hbin_prs_vk_records( "vk_records", vlist_hbin, 0, nk, file ) )
1889 return False;
1890 }
1891
1892
1893 regfio_flush( file );
1894
1895 return nk;
1896 }
1897
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