source: branches/samba-3.5.x/source3/registry/regfio.c@ 821

Last change on this file since 821 was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import
File size: 51.4 KB
Line 
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
36static 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, false)) {
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
74static 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, false)) {
83 DEBUG(0,("read_block: stat() failed! (%s)\n", strerror(errno)));
84 return -1;
85 }
86
87 if ( (size_t)file_offset >= sbuf.st_ex_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
152static 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
178static 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
202static 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
262static 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
297static 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
403static 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
424static 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
454static 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
545static 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
561static 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
600static 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
616static 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
680static 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 {
716 NTSTATUS status;
717 TALLOC_CTX *mem_ctx = prs_get_mem_context(&hbin->ps);
718 DATA_BLOB blob;
719
720 if (MARSHALLING(&hbin->ps)) {
721 status = marshall_sec_desc(mem_ctx,
722 sk->sec_desc,
723 &blob.data, &blob.length);
724 if (!NT_STATUS_IS_OK(status))
725 return False;
726 if (!prs_copy_data_in(&hbin->ps, (const char *)blob.data, blob.length))
727 return False;
728 } else {
729 blob = data_blob_const(prs_data_p(&hbin->ps),
730 prs_data_size(&hbin->ps));
731 status = unmarshall_sec_desc(mem_ctx,
732 blob.data, blob.length,
733 &sk->sec_desc);
734 if (!NT_STATUS_IS_OK(status))
735 return False;
736 prs_set_offset(&hbin->ps, blob.length);
737 }
738 }
739
740 end_off = prs_offset( &hbin->ps );
741
742 /* data_size must be divisible by 8 and large enough to hold the original record */
743
744 data_size = ((start_off - end_off) & 0xfffffff8 );
745 if ( data_size > sk->rec_size )
746 DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, sk->rec_size));
747
748 if ( MARSHALLING(&hbin->ps) )
749 hbin->dirty = True;
750
751 return True;
752}
753
754/*******************************************************************
755*******************************************************************/
756
757static bool hbin_prs_vk_rec( const char *desc, REGF_HBIN *hbin, int depth, REGF_VK_REC *vk, REGF_FILE *file )
758{
759 uint32 offset;
760 uint16 name_length;
761 prs_struct *ps = &hbin->ps;
762 uint32 data_size, start_off, end_off;
763
764 prs_debug(ps, depth, desc, "prs_vk_rec");
765 depth++;
766
767 /* backup and get the data_size */
768
769 if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
770 return False;
771 start_off = prs_offset( &hbin->ps );
772 if ( !prs_uint32( "rec_size", &hbin->ps, depth, &vk->rec_size ))
773 return False;
774
775 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)vk->header, sizeof( vk->header )) )
776 return False;
777
778 if ( MARSHALLING(&hbin->ps) )
779 name_length = strlen(vk->valuename);
780
781 if ( !prs_uint16( "name_length", ps, depth, &name_length ))
782 return False;
783 if ( !prs_uint32( "data_size", ps, depth, &vk->data_size ))
784 return False;
785 if ( !prs_uint32( "data_off", ps, depth, &vk->data_off ))
786 return False;
787 if ( !prs_uint32( "type", ps, depth, &vk->type))
788 return False;
789 if ( !prs_uint16( "flag", ps, depth, &vk->flag))
790 return False;
791
792 offset = prs_offset( ps );
793 offset += 2; /* skip 2 bytes */
794 prs_set_offset( ps, offset );
795
796 /* get the name */
797
798 if ( vk->flag&VK_FLAG_NAME_PRESENT ) {
799
800 if ( UNMARSHALLING(&hbin->ps) ) {
801 if ( !(vk->valuename = PRS_ALLOC_MEM( ps, char, name_length+1 )))
802 return False;
803 }
804 if ( !prs_uint8s( True, "name", ps, depth, (uint8*)vk->valuename, name_length ) )
805 return False;
806 }
807
808 end_off = prs_offset( &hbin->ps );
809
810 /* get the data if necessary */
811
812 if ( vk->data_size != 0 ) {
813 bool charmode = False;
814
815 if ( (vk->type == REG_SZ) || (vk->type == REG_MULTI_SZ) )
816 charmode = True;
817
818 /* the data is stored in the offset if the size <= 4 */
819
820 if ( !(vk->data_size & VK_DATA_IN_OFFSET) ) {
821 REGF_HBIN *hblock = hbin;
822 uint32 data_rec_size;
823
824 if ( UNMARSHALLING(&hbin->ps) ) {
825 if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8, vk->data_size) ) )
826 return False;
827 }
828
829 /* this data can be in another hbin */
830 if ( !hbin_contains_offset( hbin, vk->data_off ) ) {
831 if ( !(hblock = lookup_hbin_block( file, vk->data_off )) )
832 return False;
833 }
834 if ( !(prs_set_offset( &hblock->ps, (vk->data_off+HBIN_HDR_SIZE-hblock->first_hbin_off)-sizeof(uint32) )) )
835 return False;
836
837 if ( MARSHALLING(&hblock->ps) ) {
838 data_rec_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
839 data_rec_size = ( data_rec_size - 1 ) ^ 0xFFFFFFFF;
840 }
841 if ( !prs_uint32( "data_rec_size", &hblock->ps, depth, &data_rec_size ))
842 return False;
843 if ( !prs_uint8s( charmode, "data", &hblock->ps, depth, vk->data, vk->data_size) )
844 return False;
845
846 if ( MARSHALLING(&hblock->ps) )
847 hblock->dirty = True;
848 }
849 else {
850 if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8, 4 ) ) )
851 return False;
852 SIVAL( vk->data, 0, vk->data_off );
853 }
854
855 }
856
857 /* data_size must be divisible by 8 and large enough to hold the original record */
858
859 data_size = ((start_off - end_off ) & 0xfffffff8 );
860 if ( data_size != vk->rec_size )
861 DEBUG(10,("prs_vk_rec: data_size check failed (0x%x < 0x%x)\n", data_size, vk->rec_size));
862
863 if ( MARSHALLING(&hbin->ps) )
864 hbin->dirty = True;
865
866 return True;
867}
868
869/*******************************************************************
870 read a VK record which is contained in the HBIN block stored
871 in the prs_struct *ps.
872*******************************************************************/
873
874static bool hbin_prs_vk_records( const char *desc, REGF_HBIN *hbin, int depth, REGF_NK_REC *nk, REGF_FILE *file )
875{
876 int i;
877 uint32 record_size;
878
879 prs_debug(&hbin->ps, depth, desc, "prs_vk_records");
880 depth++;
881
882 /* check if we have anything to do first */
883
884 if ( nk->num_values == 0 )
885 return True;
886
887 if ( UNMARSHALLING(&hbin->ps) ) {
888 if ( !(nk->values = PRS_ALLOC_MEM( &hbin->ps, REGF_VK_REC, nk->num_values ) ) )
889 return False;
890 }
891
892 /* convert the offset to something relative to this HBIN block */
893
894 if ( !prs_set_offset( &hbin->ps, nk->values_off+HBIN_HDR_SIZE-hbin->first_hbin_off-sizeof(uint32)) )
895 return False;
896
897 if ( MARSHALLING( &hbin->ps) ) {
898 record_size = ( ( nk->num_values * sizeof(uint32) ) & 0xfffffff8 ) + 8;
899 record_size = (record_size - 1) ^ 0xFFFFFFFF;
900 }
901
902 if ( !prs_uint32( "record_size", &hbin->ps, depth, &record_size ) )
903 return False;
904
905 for ( i=0; i<nk->num_values; i++ ) {
906 if ( !prs_uint32( "vk_off", &hbin->ps, depth, &nk->values[i].rec_off ) )
907 return False;
908 }
909
910 for ( i=0; i<nk->num_values; i++ ) {
911 REGF_HBIN *sub_hbin = hbin;
912 uint32 new_offset;
913
914 if ( !hbin_contains_offset( hbin, nk->values[i].rec_off ) ) {
915 sub_hbin = lookup_hbin_block( file, nk->values[i].rec_off );
916 if ( !sub_hbin ) {
917 DEBUG(0,("hbin_prs_vk_records: Failed to find HBIN block containing offset [0x%x]\n",
918 nk->values[i].hbin_off));
919 return False;
920 }
921 }
922
923 new_offset = nk->values[i].rec_off + HBIN_HDR_SIZE - sub_hbin->first_hbin_off;
924 if ( !prs_set_offset( &sub_hbin->ps, new_offset ) )
925 return False;
926 if ( !hbin_prs_vk_rec( "vk_rec", sub_hbin, depth, &nk->values[i], file ) )
927 return False;
928 }
929
930 if ( MARSHALLING(&hbin->ps) )
931 hbin->dirty = True;
932
933
934 return True;
935}
936
937
938/*******************************************************************
939*******************************************************************/
940
941static REGF_SK_REC* find_sk_record_by_offset( REGF_FILE *file, uint32 offset )
942{
943 REGF_SK_REC *p_sk;
944
945 for ( p_sk=file->sec_desc_list; p_sk; p_sk=p_sk->next ) {
946 if ( p_sk->sk_off == offset )
947 return p_sk;
948 }
949
950 return NULL;
951}
952
953/*******************************************************************
954*******************************************************************/
955
956static REGF_SK_REC* find_sk_record_by_sec_desc( REGF_FILE *file, SEC_DESC *sd )
957{
958 REGF_SK_REC *p;
959
960 for ( p=file->sec_desc_list; p; p=p->next ) {
961 if ( security_descriptor_equal( p->sec_desc, sd ) )
962 return p;
963 }
964
965 /* failure */
966
967 return NULL;
968}
969
970/*******************************************************************
971*******************************************************************/
972
973static bool hbin_prs_key( REGF_FILE *file, REGF_HBIN *hbin, REGF_NK_REC *nk )
974{
975 int depth = 0;
976 REGF_HBIN *sub_hbin;
977
978 prs_debug(&hbin->ps, depth, "", "fetch_key");
979 depth++;
980
981 /* get the initial nk record */
982
983 if ( !prs_nk_rec( "nk_rec", &hbin->ps, depth, nk ))
984 return False;
985
986 /* fill in values */
987
988 if ( nk->num_values && (nk->values_off!=REGF_OFFSET_NONE) ) {
989 sub_hbin = hbin;
990 if ( !hbin_contains_offset( hbin, nk->values_off ) ) {
991 sub_hbin = lookup_hbin_block( file, nk->values_off );
992 if ( !sub_hbin ) {
993 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing value_list_offset [0x%x]\n",
994 nk->values_off));
995 return False;
996 }
997 }
998
999 if ( !hbin_prs_vk_records( "vk_rec", sub_hbin, depth, nk, file ))
1000 return False;
1001 }
1002
1003 /* now get subkeys */
1004
1005 if ( nk->num_subkeys && (nk->subkeys_off!=REGF_OFFSET_NONE) ) {
1006 sub_hbin = hbin;
1007 if ( !hbin_contains_offset( hbin, nk->subkeys_off ) ) {
1008 sub_hbin = lookup_hbin_block( file, nk->subkeys_off );
1009 if ( !sub_hbin ) {
1010 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing subkey_offset [0x%x]\n",
1011 nk->subkeys_off));
1012 return False;
1013 }
1014 }
1015
1016 if ( !hbin_prs_lf_records( "lf_rec", sub_hbin, depth, nk ))
1017 return False;
1018 }
1019
1020 /* get the to the security descriptor. First look if we have already parsed it */
1021
1022 if ( (nk->sk_off!=REGF_OFFSET_NONE) && !( nk->sec_desc = find_sk_record_by_offset( file, nk->sk_off )) ) {
1023
1024 sub_hbin = hbin;
1025 if ( !hbin_contains_offset( hbin, nk->sk_off ) ) {
1026 sub_hbin = lookup_hbin_block( file, nk->sk_off );
1027 if ( !sub_hbin ) {
1028 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing sk_offset [0x%x]\n",
1029 nk->subkeys_off));
1030 return False;
1031 }
1032 }
1033
1034 if ( !(nk->sec_desc = TALLOC_ZERO_P( file->mem_ctx, REGF_SK_REC )) )
1035 return False;
1036 nk->sec_desc->sk_off = nk->sk_off;
1037 if ( !hbin_prs_sk_rec( "sk_rec", sub_hbin, depth, nk->sec_desc ))
1038 return False;
1039
1040 /* add to the list of security descriptors (ref_count has been read from the files) */
1041
1042 nk->sec_desc->sk_off = nk->sk_off;
1043 DLIST_ADD( file->sec_desc_list, nk->sec_desc );
1044 }
1045
1046 return True;
1047}
1048
1049/*******************************************************************
1050*******************************************************************/
1051
1052static bool next_record( REGF_HBIN *hbin, const char *hdr, bool *eob )
1053{
1054 uint8 header[REC_HDR_SIZE];
1055 uint32 record_size;
1056 uint32 curr_off, block_size;
1057 bool found = False;
1058 prs_struct *ps = &hbin->ps;
1059
1060 curr_off = prs_offset( ps );
1061 if ( curr_off == 0 )
1062 prs_set_offset( ps, HBIN_HEADER_REC_SIZE );
1063
1064 /* assume that the current offset is at the record header
1065 and we need to backup to read the record size */
1066
1067 curr_off -= sizeof(uint32);
1068
1069 block_size = prs_data_size( ps );
1070 record_size = 0;
1071 memset( header, 0x0, sizeof(uint8)*REC_HDR_SIZE );
1072 while ( !found ) {
1073
1074 curr_off = curr_off+record_size;
1075 if ( curr_off >= block_size )
1076 break;
1077
1078 if ( !prs_set_offset( &hbin->ps, curr_off) )
1079 return False;
1080
1081 if ( !prs_uint32( "record_size", ps, 0, &record_size ) )
1082 return False;
1083 if ( !prs_uint8s( True, "header", ps, 0, header, REC_HDR_SIZE ) )
1084 return False;
1085
1086 if ( record_size & 0x80000000 ) {
1087 /* absolute_value(record_size) */
1088 record_size = (record_size ^ 0xffffffff) + 1;
1089 }
1090
1091 if ( memcmp( header, hdr, REC_HDR_SIZE ) == 0 ) {
1092 found = True;
1093 curr_off += sizeof(uint32);
1094 }
1095 }
1096
1097 /* mark prs_struct as done ( at end ) if no more SK records */
1098 /* mark end-of-block as True */
1099
1100 if ( !found ) {
1101 prs_set_offset( &hbin->ps, prs_data_size(&hbin->ps) );
1102 *eob = True;
1103 return False;
1104 }
1105
1106 if ( !prs_set_offset( ps, curr_off ) )
1107 return False;
1108
1109 return True;
1110}
1111
1112/*******************************************************************
1113*******************************************************************/
1114
1115static bool next_nk_record( REGF_FILE *file, REGF_HBIN *hbin, REGF_NK_REC *nk, bool *eob )
1116{
1117 if ( next_record( hbin, "nk", eob ) && hbin_prs_key( file, hbin, nk ) )
1118 return True;
1119
1120 return False;
1121}
1122
1123/*******************************************************************
1124 Intialize the newly created REGF_BLOCK in *file and write the
1125 block header to disk
1126*******************************************************************/
1127
1128static bool init_regf_block( REGF_FILE *file )
1129{
1130 prs_struct ps;
1131 bool result = True;
1132
1133 if ( !prs_init( &ps, REGF_BLOCKSIZE, file->mem_ctx, MARSHALL ) )
1134 return False;
1135
1136 memcpy( file->header, "regf", REGF_HDR_SIZE );
1137 file->data_offset = 0x20;
1138 file->last_block = 0x1000;
1139
1140 /* set mod time */
1141
1142 unix_to_nt_time( &file->mtime, time(NULL) );
1143
1144 /* hard coded values...no diea what these are ... maybe in time */
1145
1146 file->unknown1 = 0x2;
1147 file->unknown2 = 0x1;
1148 file->unknown3 = 0x3;
1149 file->unknown4 = 0x0;
1150 file->unknown5 = 0x1;
1151 file->unknown6 = 0x1;
1152
1153 /* write header to the buffer */
1154
1155 if ( !prs_regf_block( "regf_header", &ps, 0, file ) ) {
1156 result = False;
1157 goto out;
1158 }
1159
1160 /* calculate the checksum, re-marshall data (to include the checksum)
1161 and write to disk */
1162
1163 file->checksum = regf_block_checksum( &ps );
1164 prs_set_offset( &ps, 0 );
1165 if ( !prs_regf_block( "regf_header", &ps, 0, file ) ) {
1166 result = False;
1167 goto out;
1168 }
1169
1170 if ( write_block( file, &ps, 0 ) == -1 ) {
1171 DEBUG(0,("init_regf_block: Failed to initialize registry header block!\n"));
1172 result = False;
1173 goto out;
1174 }
1175
1176out:
1177 prs_mem_free( &ps );
1178
1179 return result;
1180}
1181/*******************************************************************
1182 Open the registry file and then read in the REGF block to get the
1183 first hbin offset.
1184*******************************************************************/
1185
1186 REGF_FILE* regfio_open( const char *filename, int flags, int mode )
1187{
1188 REGF_FILE *rb;
1189
1190 if ( !(rb = SMB_MALLOC_P(REGF_FILE)) ) {
1191 DEBUG(0,("ERROR allocating memory\n"));
1192 return NULL;
1193 }
1194 ZERO_STRUCTP( rb );
1195 rb->fd = -1;
1196
1197 if ( !(rb->mem_ctx = talloc_init( "read_regf_block" )) ) {
1198 regfio_close( rb );
1199 return NULL;
1200 }
1201
1202 rb->open_flags = flags;
1203
1204 /* open and existing file */
1205
1206 if ( (rb->fd = open(filename, flags, mode)) == -1 ) {
1207 DEBUG(0,("regfio_open: failure to open %s (%s)\n", filename, strerror(errno)));
1208 regfio_close( rb );
1209 return NULL;
1210 }
1211
1212 /* check if we are creating a new file or overwriting an existing one */
1213
1214 if ( flags & (O_CREAT|O_TRUNC) ) {
1215 if ( !init_regf_block( rb ) ) {
1216 DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));
1217 regfio_close( rb );
1218 return NULL;
1219 }
1220
1221 /* success */
1222 return rb;
1223 }
1224
1225 /* read in an existing file */
1226
1227 if ( !read_regf_block( rb ) ) {
1228 DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));
1229 regfio_close( rb );
1230 return NULL;
1231 }
1232
1233 /* success */
1234
1235 return rb;
1236}
1237
1238/*******************************************************************
1239*******************************************************************/
1240
1241static void regfio_mem_free( REGF_FILE *file )
1242{
1243 /* free any talloc()'d memory */
1244
1245 if ( file && file->mem_ctx )
1246 talloc_destroy( file->mem_ctx );
1247}
1248
1249/*******************************************************************
1250*******************************************************************/
1251
1252 int regfio_close( REGF_FILE *file )
1253{
1254 int fd;
1255
1256 /* cleanup for a file opened for write */
1257
1258 if ((file->fd != -1) && (file->open_flags & (O_WRONLY|O_RDWR))) {
1259 prs_struct ps;
1260 REGF_SK_REC *sk;
1261
1262 /* write of sd list */
1263
1264 for ( sk=file->sec_desc_list; sk; sk=sk->next ) {
1265 hbin_prs_sk_rec( "sk_rec", sk->hbin, 0, sk );
1266 }
1267
1268 /* flush any dirty blocks */
1269
1270 while ( file->block_list ) {
1271 hbin_block_close( file, file->block_list );
1272 }
1273
1274 ZERO_STRUCT( ps );
1275
1276 unix_to_nt_time( &file->mtime, time(NULL) );
1277
1278 if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) != -1 ) {
1279 /* now use for writing */
1280 prs_switch_type( &ps, MARSHALL );
1281
1282 /* stream the block once, generate the checksum,
1283 and stream it again */
1284 prs_set_offset( &ps, 0 );
1285 prs_regf_block( "regf_blocK", &ps, 0, file );
1286 file->checksum = regf_block_checksum( &ps );
1287 prs_set_offset( &ps, 0 );
1288 prs_regf_block( "regf_blocK", &ps, 0, file );
1289
1290 /* now we are ready to write it to disk */
1291 if ( write_block( file, &ps, 0 ) == -1 )
1292 DEBUG(0,("regfio_close: failed to update the regf header block!\n"));
1293 }
1294
1295 prs_mem_free( &ps );
1296 }
1297
1298 regfio_mem_free( file );
1299
1300 /* nothing tdo do if there is no open file */
1301
1302 if (file->fd == -1)
1303 return 0;
1304
1305 fd = file->fd;
1306 file->fd = -1;
1307 SAFE_FREE( file );
1308
1309 return close( fd );
1310}
1311
1312/*******************************************************************
1313*******************************************************************/
1314
1315static void regfio_flush( REGF_FILE *file )
1316{
1317 REGF_HBIN *hbin;
1318
1319 for ( hbin=file->block_list; hbin; hbin=hbin->next ) {
1320 write_hbin_block( file, hbin );
1321 }
1322}
1323
1324/*******************************************************************
1325 There should be only *one* root key in the registry file based
1326 on my experience. --jerry
1327*******************************************************************/
1328
1329REGF_NK_REC* regfio_rootkey( REGF_FILE *file )
1330{
1331 REGF_NK_REC *nk;
1332 REGF_HBIN *hbin;
1333 uint32 offset = REGF_BLOCKSIZE;
1334 bool found = False;
1335 bool eob;
1336
1337 if ( !file )
1338 return NULL;
1339
1340 if ( !(nk = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) ) {
1341 DEBUG(0,("regfio_rootkey: talloc() failed!\n"));
1342 return NULL;
1343 }
1344
1345 /* scan through the file on HBIN block at a time looking
1346 for an NK record with a type == 0x002c.
1347 Normally this is the first nk record in the first hbin
1348 block (but I'm not assuming that for now) */
1349
1350 while ( (hbin = read_hbin_block( file, offset )) ) {
1351 eob = False;
1352
1353 while ( !eob) {
1354 if ( next_nk_record( file, hbin, nk, &eob ) ) {
1355 if ( nk->key_type == NK_TYPE_ROOTKEY ) {
1356 found = True;
1357 break;
1358 }
1359 }
1360 prs_mem_free( &hbin->ps );
1361 }
1362
1363 if ( found )
1364 break;
1365
1366 offset += hbin->block_size;
1367 }
1368
1369 if ( !found ) {
1370 DEBUG(0,("regfio_rootkey: corrupt registry file ? No root key record located\n"));
1371 return NULL;
1372 }
1373
1374 DLIST_ADD( file->block_list, hbin );
1375
1376 return nk;
1377}
1378
1379/*******************************************************************
1380 This acts as an interator over the subkeys defined for a given
1381 NK record. Remember that offsets are from the *first* HBIN block.
1382*******************************************************************/
1383
1384 REGF_NK_REC* regfio_fetch_subkey( REGF_FILE *file, REGF_NK_REC *nk )
1385{
1386 REGF_NK_REC *subkey;
1387 REGF_HBIN *hbin;
1388 uint32 nk_offset;
1389
1390 /* see if there is anything left to report */
1391
1392 if ( !nk || (nk->subkeys_off==REGF_OFFSET_NONE) || (nk->subkey_index >= nk->num_subkeys) )
1393 return NULL;
1394
1395 /* find the HBIN block which should contain the nk record */
1396
1397 if ( !(hbin = lookup_hbin_block( file, nk->subkeys.hashes[nk->subkey_index].nk_off )) ) {
1398 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing offset [0x%x]\n",
1399 nk->subkeys.hashes[nk->subkey_index].nk_off));
1400 return NULL;
1401 }
1402
1403 nk_offset = nk->subkeys.hashes[nk->subkey_index].nk_off;
1404 if ( !prs_set_offset( &hbin->ps, (HBIN_HDR_SIZE + nk_offset - hbin->first_hbin_off) ) )
1405 return NULL;
1406
1407 nk->subkey_index++;
1408 if ( !(subkey = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) )
1409 return NULL;
1410
1411 if ( !hbin_prs_key( file, hbin, subkey ) )
1412 return NULL;
1413
1414 return subkey;
1415}
1416
1417
1418/*******************************************************************
1419*******************************************************************/
1420
1421static REGF_HBIN* regf_hbin_allocate( REGF_FILE *file, uint32 block_size )
1422{
1423 REGF_HBIN *hbin;
1424 SMB_STRUCT_STAT sbuf;
1425
1426 if ( !(hbin = TALLOC_ZERO_P( file->mem_ctx, REGF_HBIN )) )
1427 return NULL;
1428
1429 memcpy( hbin->header, "hbin", sizeof(HBIN_HDR_SIZE) );
1430
1431
1432 if (sys_fstat(file->fd, &sbuf, false)) {
1433 DEBUG(0,("regf_hbin_allocate: stat() failed! (%s)\n", strerror(errno)));
1434 return NULL;
1435 }
1436
1437 hbin->file_off = sbuf.st_ex_size;
1438
1439 hbin->free_off = HBIN_HEADER_REC_SIZE;
1440 hbin->free_size = block_size - hbin->free_off + sizeof(uint32);;
1441
1442 hbin->block_size = block_size;
1443 hbin->first_hbin_off = hbin->file_off - REGF_BLOCKSIZE;
1444
1445 if ( !prs_init( &hbin->ps, block_size, file->mem_ctx, MARSHALL ) )
1446 return NULL;
1447
1448 if ( !prs_hbin_block( "new_hbin", &hbin->ps, 0, hbin ) )
1449 return NULL;
1450
1451 if ( !write_hbin_block( file, hbin ) )
1452 return NULL;
1453
1454 file->last_block = hbin->file_off;
1455
1456 return hbin;
1457}
1458
1459/*******************************************************************
1460*******************************************************************/
1461
1462static void update_free_space( REGF_HBIN *hbin, uint32 size_used )
1463{
1464 hbin->free_off += size_used;
1465 hbin->free_size -= size_used;
1466
1467 if ( hbin->free_off >= hbin->block_size ) {
1468 hbin->free_off = REGF_OFFSET_NONE;
1469 }
1470
1471 return;
1472}
1473
1474/*******************************************************************
1475*******************************************************************/
1476
1477static REGF_HBIN* find_free_space( REGF_FILE *file, uint32 size )
1478{
1479 REGF_HBIN *hbin, *p_hbin;
1480 uint32 block_off;
1481 bool cached;
1482
1483 /* check open block list */
1484
1485 for ( hbin=file->block_list; hbin!=NULL; hbin=hbin->next ) {
1486 /* only check blocks that actually have available space */
1487
1488 if ( hbin->free_off == REGF_OFFSET_NONE )
1489 continue;
1490
1491 /* check for a large enough available chunk */
1492
1493 if ( (hbin->block_size - hbin->free_off) >= size ) {
1494 DLIST_PROMOTE( file->block_list, hbin );
1495 goto done;
1496 }
1497 }
1498
1499 /* parse the file until we find a block with
1500 enough free space; save the last non-filled hbin */
1501
1502 block_off = REGF_BLOCKSIZE;
1503 do {
1504 /* cleanup before the next round */
1505 cached = False;
1506 if ( hbin )
1507 prs_mem_free( &hbin->ps );
1508
1509 hbin = read_hbin_block( file, block_off );
1510
1511 if ( hbin ) {
1512
1513 /* make sure that we don't already have this block in memory */
1514
1515 for ( p_hbin=file->block_list; p_hbin!=NULL; p_hbin=p_hbin->next ) {
1516 if ( p_hbin->file_off == hbin->file_off ) {
1517 cached = True;
1518 break;
1519 }
1520 }
1521
1522 block_off = hbin->file_off + hbin->block_size;
1523
1524 if ( cached ) {
1525 prs_mem_free( &hbin->ps );
1526 hbin = NULL;
1527 continue;
1528 }
1529 }
1530 /* if (cached block or (new block and not enough free space)) then continue looping */
1531 } while ( cached || (hbin && (hbin->free_size < size)) );
1532
1533 /* no free space; allocate a new one */
1534
1535 if ( !hbin ) {
1536 uint32 alloc_size;
1537
1538 /* allocate in multiples of REGF_ALLOC_BLOCK; make sure (size + hbin_header) fits */
1539
1540 alloc_size = (((size+HBIN_HEADER_REC_SIZE) / REGF_ALLOC_BLOCK ) + 1 ) * REGF_ALLOC_BLOCK;
1541
1542 if ( !(hbin = regf_hbin_allocate( file, alloc_size )) ) {
1543 DEBUG(0,("find_free_space: regf_hbin_allocate() failed!\n"));
1544 return NULL;
1545 }
1546 DLIST_ADD( file->block_list, hbin );
1547 }
1548
1549done:
1550 /* set the offset to be ready to write */
1551
1552 if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32) ) )
1553 return NULL;
1554
1555 /* write the record size as a placeholder for now, it should be
1556 probably updated by the caller once it all of the data necessary
1557 for the record */
1558
1559 if ( !prs_uint32("allocated_size", &hbin->ps, 0, &size) )
1560 return False;
1561
1562 update_free_space( hbin, size );
1563
1564 return hbin;
1565}
1566
1567/*******************************************************************
1568*******************************************************************/
1569
1570static uint32 sk_record_data_size( SEC_DESC * sd )
1571{
1572 uint32 size, size_mod8;
1573
1574 size_mod8 = 0;
1575
1576 /* the record size is sizeof(hdr) + name + static members + data_size_field */
1577
1578 size = sizeof(uint32)*5 + ndr_size_security_descriptor(sd, NULL, 0) + sizeof(uint32);
1579
1580 /* multiple of 8 */
1581 size_mod8 = size & 0xfffffff8;
1582 if ( size_mod8 < size )
1583 size_mod8 += 8;
1584
1585 return size_mod8;
1586}
1587
1588/*******************************************************************
1589*******************************************************************/
1590
1591static uint32 vk_record_data_size( REGF_VK_REC *vk )
1592{
1593 uint32 size, size_mod8;
1594
1595 size_mod8 = 0;
1596
1597 /* the record size is sizeof(hdr) + name + static members + data_size_field */
1598
1599 size = REC_HDR_SIZE + (sizeof(uint16)*3) + (sizeof(uint32)*3) + sizeof(uint32);
1600
1601 if ( vk->valuename )
1602 size += strlen(vk->valuename);
1603
1604 /* multiple of 8 */
1605 size_mod8 = size & 0xfffffff8;
1606 if ( size_mod8 < size )
1607 size_mod8 += 8;
1608
1609 return size_mod8;
1610}
1611
1612/*******************************************************************
1613*******************************************************************/
1614
1615static uint32 lf_record_data_size( uint32 num_keys )
1616{
1617 uint32 size, size_mod8;
1618
1619 size_mod8 = 0;
1620
1621 /* the record size is sizeof(hdr) + num_keys + sizeof of hash_array + data_size_uint32 */
1622
1623 size = REC_HDR_SIZE + sizeof(uint16) + (sizeof(REGF_HASH_REC) * num_keys) + sizeof(uint32);
1624
1625 /* multiple of 8 */
1626 size_mod8 = size & 0xfffffff8;
1627 if ( size_mod8 < size )
1628 size_mod8 += 8;
1629
1630 return size_mod8;
1631}
1632
1633/*******************************************************************
1634*******************************************************************/
1635
1636static uint32 nk_record_data_size( REGF_NK_REC *nk )
1637{
1638 uint32 size, size_mod8;
1639
1640 size_mod8 = 0;
1641
1642 /* the record size is static + length_of_keyname + length_of_classname + data_size_uint32 */
1643
1644 size = 0x4c + strlen(nk->keyname) + sizeof(uint32);
1645
1646 if ( nk->classname )
1647 size += strlen( nk->classname );
1648
1649 /* multiple of 8 */
1650 size_mod8 = size & 0xfffffff8;
1651 if ( size_mod8 < size )
1652 size_mod8 += 8;
1653
1654 return size_mod8;
1655}
1656
1657/*******************************************************************
1658*******************************************************************/
1659
1660static bool create_vk_record(REGF_FILE *file, REGF_VK_REC *vk,
1661 struct regval_blob *value)
1662{
1663 char *name = regval_name(value);
1664 REGF_HBIN *data_hbin;
1665
1666 ZERO_STRUCTP( vk );
1667
1668 memcpy( vk->header, "vk", REC_HDR_SIZE );
1669
1670 if ( name ) {
1671 vk->valuename = talloc_strdup( file->mem_ctx, regval_name(value) );
1672 vk->flag = VK_FLAG_NAME_PRESENT;
1673 }
1674
1675 vk->data_size = regval_size( value );
1676 vk->type = regval_type( value );
1677
1678 if ( vk->data_size > sizeof(uint32) ) {
1679 uint32 data_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
1680
1681 vk->data = (uint8 *)TALLOC_MEMDUP( file->mem_ctx,
1682 regval_data_p(value),
1683 vk->data_size );
1684 if (vk->data == NULL) {
1685 return False;
1686 }
1687
1688 /* go ahead and store the offset....we'll pick this hbin block back up when
1689 we stream the data */
1690
1691 if ((data_hbin = find_free_space(file, data_size )) == NULL) {
1692 return False;
1693 }
1694 vk->data_off = prs_offset( &data_hbin->ps ) + data_hbin->first_hbin_off - HBIN_HDR_SIZE;
1695 }
1696 else {
1697 /* make sure we don't try to copy from a NULL value pointer */
1698
1699 if ( vk->data_size != 0 )
1700 memcpy( &vk->data_off, regval_data_p(value), sizeof(uint32) );
1701 vk->data_size |= VK_DATA_IN_OFFSET;
1702 }
1703
1704 return True;
1705}
1706
1707/*******************************************************************
1708*******************************************************************/
1709
1710static int hashrec_cmp( REGF_HASH_REC *h1, REGF_HASH_REC *h2 )
1711{
1712 return StrCaseCmp( h1->fullname, h2->fullname );
1713}
1714
1715/*******************************************************************
1716*******************************************************************/
1717
1718 REGF_NK_REC* regfio_write_key( REGF_FILE *file, const char *name,
1719 struct regval_ctr *values, struct regsubkey_ctr *subkeys,
1720 SEC_DESC *sec_desc, REGF_NK_REC *parent )
1721{
1722 REGF_NK_REC *nk;
1723 REGF_HBIN *vlist_hbin = NULL;
1724 uint32 size;
1725
1726 if ( !(nk = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) )
1727 return NULL;
1728
1729 memcpy( nk->header, "nk", REC_HDR_SIZE );
1730
1731 if ( !parent )
1732 nk->key_type = NK_TYPE_ROOTKEY;
1733 else
1734 nk->key_type = NK_TYPE_NORMALKEY;
1735
1736 /* store the parent offset (or -1 if a the root key */
1737
1738 nk->parent_off = parent ? (parent->hbin_off + parent->hbin->file_off - REGF_BLOCKSIZE - HBIN_HDR_SIZE ) : REGF_OFFSET_NONE;
1739
1740 /* no classname currently */
1741
1742 nk->classname_off = REGF_OFFSET_NONE;
1743 nk->classname = NULL;
1744 nk->keyname = talloc_strdup( file->mem_ctx, name );
1745
1746 /* current modification time */
1747
1748 unix_to_nt_time( &nk->mtime, time(NULL) );
1749
1750 /* allocate the record on disk */
1751
1752 size = nk_record_data_size( nk );
1753 nk->rec_size = ( size - 1 ) ^ 0XFFFFFFFF;
1754 if ((nk->hbin = find_free_space( file, size )) == NULL) {
1755 return NULL;
1756 }
1757 nk->hbin_off = prs_offset( &nk->hbin->ps );
1758
1759 /* Update the hash record in the parent */
1760
1761 if ( parent ) {
1762 REGF_HASH_REC *hash = &parent->subkeys.hashes[parent->subkey_index];
1763
1764 hash->nk_off = prs_offset( &nk->hbin->ps ) + nk->hbin->first_hbin_off - HBIN_HDR_SIZE;
1765 memcpy( hash->keycheck, name, sizeof(uint32) );
1766 hash->fullname = talloc_strdup( file->mem_ctx, name );
1767 parent->subkey_index++;
1768
1769 /* sort the list by keyname */
1770
1771 qsort( parent->subkeys.hashes, parent->subkey_index, sizeof(REGF_HASH_REC), QSORT_CAST hashrec_cmp );
1772
1773 if ( !hbin_prs_lf_records( "lf_rec", parent->subkeys.hbin, 0, parent ) )
1774 return False;
1775 }
1776
1777 /* write the security descriptor */
1778
1779 nk->sk_off = REGF_OFFSET_NONE;
1780 if ( sec_desc ) {
1781 uint32 sk_size = sk_record_data_size( sec_desc );
1782 REGF_HBIN *sk_hbin;
1783
1784 /* search for it in the existing list of sd's */
1785
1786 if ( (nk->sec_desc = find_sk_record_by_sec_desc( file, sec_desc )) == NULL ) {
1787 /* not found so add it to the list */
1788
1789 if (!(sk_hbin = find_free_space( file, sk_size ))) {
1790 return NULL;
1791 }
1792
1793 if ( !(nk->sec_desc = TALLOC_ZERO_P( file->mem_ctx, REGF_SK_REC )) )
1794 return NULL;
1795
1796 /* now we have to store the security descriptor in the list and
1797 update the offsets */
1798
1799 memcpy( nk->sec_desc->header, "sk", REC_HDR_SIZE );
1800 nk->sec_desc->hbin = sk_hbin;
1801 nk->sec_desc->hbin_off = prs_offset( &sk_hbin->ps );
1802 nk->sec_desc->sk_off = prs_offset( &sk_hbin->ps ) + sk_hbin->first_hbin_off - HBIN_HDR_SIZE;
1803 nk->sec_desc->rec_size = (sk_size-1) ^ 0xFFFFFFFF;
1804
1805 nk->sec_desc->sec_desc = sec_desc;
1806 nk->sec_desc->ref_count = 0;
1807
1808 /* size value must be self-inclusive */
1809 nk->sec_desc->size = ndr_size_security_descriptor(sec_desc, NULL, 0)
1810 + sizeof(uint32);
1811
1812 DLIST_ADD_END( file->sec_desc_list, nk->sec_desc, REGF_SK_REC *);
1813
1814 /* update the offsets for us and the previous sd in the list.
1815 if this is the first record, then just set the next and prev
1816 offsets to ourself. */
1817
1818 if ( nk->sec_desc->prev ) {
1819 REGF_SK_REC *prev = nk->sec_desc->prev;
1820
1821 nk->sec_desc->prev_sk_off = prev->hbin_off + prev->hbin->first_hbin_off - HBIN_HDR_SIZE;
1822 prev->next_sk_off = nk->sec_desc->sk_off;
1823
1824 /* the end must loop around to the front */
1825 nk->sec_desc->next_sk_off = file->sec_desc_list->sk_off;
1826
1827 /* and first must loop around to the tail */
1828 file->sec_desc_list->prev_sk_off = nk->sec_desc->sk_off;
1829 } else {
1830 nk->sec_desc->prev_sk_off = nk->sec_desc->sk_off;
1831 nk->sec_desc->next_sk_off = nk->sec_desc->sk_off;
1832 }
1833 }
1834
1835 /* bump the reference count +1 */
1836
1837 nk->sk_off = nk->sec_desc->sk_off;
1838 nk->sec_desc->ref_count++;
1839 }
1840
1841 /* write the subkeys */
1842
1843 nk->subkeys_off = REGF_OFFSET_NONE;
1844 if ( (nk->num_subkeys = regsubkey_ctr_numkeys( subkeys )) != 0 ) {
1845 uint32 lf_size = lf_record_data_size( nk->num_subkeys );
1846 uint32 namelen;
1847 int i;
1848
1849 if (!(nk->subkeys.hbin = find_free_space( file, lf_size ))) {
1850 return NULL;
1851 }
1852 nk->subkeys.hbin_off = prs_offset( &nk->subkeys.hbin->ps );
1853 nk->subkeys.rec_size = (lf_size-1) ^ 0xFFFFFFFF;
1854 nk->subkeys_off = prs_offset( &nk->subkeys.hbin->ps ) + nk->subkeys.hbin->first_hbin_off - HBIN_HDR_SIZE;
1855
1856 memcpy( nk->subkeys.header, "lf", REC_HDR_SIZE );
1857
1858 nk->subkeys.num_keys = nk->num_subkeys;
1859 if (nk->subkeys.num_keys) {
1860 if ( !(nk->subkeys.hashes = TALLOC_ZERO_ARRAY( file->mem_ctx, REGF_HASH_REC, nk->subkeys.num_keys )) )
1861 return NULL;
1862 } else {
1863 nk->subkeys.hashes = NULL;
1864 }
1865 nk->subkey_index = 0;
1866
1867 /* update the max_bytes_subkey{name,classname} fields */
1868 for ( i=0; i<nk->num_subkeys; i++ ) {
1869 namelen = strlen( regsubkey_ctr_specific_key(subkeys, i) );
1870 if ( namelen*2 > nk->max_bytes_subkeyname )
1871 nk->max_bytes_subkeyname = namelen * 2;
1872 }
1873 }
1874
1875 /* write the values */
1876
1877 nk->values_off = REGF_OFFSET_NONE;
1878 if ( (nk->num_values = regval_ctr_numvals( values )) != 0 ) {
1879 uint32 vlist_size = ( ( nk->num_values * sizeof(uint32) ) & 0xfffffff8 ) + 8;
1880 int i;
1881
1882 if (!(vlist_hbin = find_free_space( file, vlist_size ))) {
1883 return NULL;
1884 }
1885 nk->values_off = prs_offset( &vlist_hbin->ps ) + vlist_hbin->first_hbin_off - HBIN_HDR_SIZE;
1886
1887 if (nk->num_values) {
1888 if ( !(nk->values = TALLOC_ARRAY( file->mem_ctx, REGF_VK_REC, nk->num_values )) )
1889 return NULL;
1890 } else {
1891 nk->values = NULL;
1892 }
1893
1894 /* create the vk records */
1895
1896 for ( i=0; i<nk->num_values; i++ ) {
1897 uint32 vk_size, namelen, datalen;
1898 struct regval_blob *r;
1899
1900 r = regval_ctr_specific_value( values, i );
1901 create_vk_record( file, &nk->values[i], r );
1902 vk_size = vk_record_data_size( &nk->values[i] );
1903 nk->values[i].hbin = find_free_space( file, vk_size );
1904 nk->values[i].hbin_off = prs_offset( &nk->values[i].hbin->ps );
1905 nk->values[i].rec_size = ( vk_size - 1 ) ^ 0xFFFFFFFF;
1906 nk->values[i].rec_off = prs_offset( &nk->values[i].hbin->ps )
1907 + nk->values[i].hbin->first_hbin_off
1908 - HBIN_HDR_SIZE;
1909
1910 /* update the max bytes fields if necessary */
1911
1912 namelen = strlen( regval_name(r) );
1913 if ( namelen*2 > nk->max_bytes_valuename )
1914 nk->max_bytes_valuename = namelen * 2;
1915
1916 datalen = regval_size( r );
1917 if ( datalen > nk->max_bytes_value )
1918 nk->max_bytes_value = datalen;
1919 }
1920 }
1921
1922 /* stream the records */
1923
1924 prs_set_offset( &nk->hbin->ps, nk->hbin_off );
1925 if ( !prs_nk_rec( "nk_rec", &nk->hbin->ps, 0, nk ) )
1926 return False;
1927
1928 if ( nk->num_values ) {
1929 if ( !hbin_prs_vk_records( "vk_records", vlist_hbin, 0, nk, file ) )
1930 return False;
1931 }
1932
1933
1934 regfio_flush( file );
1935
1936 return nk;
1937}
1938
Note: See TracBrowser for help on using the repository browser.