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s3:registry: extract the reg_util prototypes into their own header.
[Samba/ekacnet.git] / source3 / registry / regfio.c
blob60a05040e264fd13ed05125cf376de9b155428ff
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 #include "reg_objects.h"
23
24 #undef DBGC_CLASS
25 #define DBGC_CLASS DBGC_REGISTRY
26
27 /*******************************************************************
28 *
29 * TODO : Right now this code basically ignores classnames.
30 *
31 ******************************************************************/
32
33
34 /*******************************************************************
35 *******************************************************************/
36
37 static int write_block( REGF_FILE *file, prs_struct *ps, uint32 offset )
38 {
39 int bytes_written, returned;
40 char *buffer = prs_data_p( ps );
41 uint32 buffer_size = prs_data_size( ps );
42 SMB_STRUCT_STAT sbuf;
43
44 if ( file->fd == -1 )
45 return -1;
46
47 /* check for end of file */
48
49 if (sys_fstat(file->fd, &sbuf, false)) {
50 DEBUG(0,("write_block: stat() failed! (%s)\n", strerror(errno)));
51 return -1;
52 }
53
54 if ( lseek( file->fd, offset, SEEK_SET ) == -1 ) {
55 DEBUG(0,("write_block: lseek() failed! (%s)\n", strerror(errno) ));
56 return -1;
57 }
58
59 bytes_written = returned = 0;
60 while ( bytes_written < buffer_size ) {
61 if ( (returned = write( file->fd, buffer+bytes_written, buffer_size-bytes_written )) == -1 ) {
62 DEBUG(0,("write_block: write() failed! (%s)\n", strerror(errno) ));
63 return False;
64 }
65
66 bytes_written += returned;
67 }
68
69 return bytes_written;
70 }
71
72 /*******************************************************************
73 *******************************************************************/
74
75 static int read_block( REGF_FILE *file, prs_struct *ps, uint32 file_offset, uint32 block_size )
76 {
77 int bytes_read, returned;
78 char *buffer;
79 SMB_STRUCT_STAT sbuf;
80
81 /* check for end of file */
82
83 if (sys_fstat(file->fd, &sbuf, false)) {
84 DEBUG(0,("read_block: stat() failed! (%s)\n", strerror(errno)));
85 return -1;
86 }
87
88 if ( (size_t)file_offset >= sbuf.st_ex_size )
89 return -1;
90
91 /* if block_size == 0, we are parsing HBIN records and need
92 to read some of the header to get the block_size from there */
93
94 if ( block_size == 0 ) {
95 char hdr[0x20];
96
97 if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
98 DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));
99 return -1;
100 }
101
102 returned = read( file->fd, hdr, 0x20 );
103 if ( (returned == -1) || (returned < 0x20) ) {
104 DEBUG(0,("read_block: failed to read in HBIN header. Is the file corrupt?\n"));
105 return -1;
106 }
107
108 /* make sure this is an hbin header */
109
110 if ( strncmp( hdr, "hbin", HBIN_HDR_SIZE ) != 0 ) {
111 DEBUG(0,("read_block: invalid block header!\n"));
112 return -1;
113 }
114
115 block_size = IVAL( hdr, 0x08 );
116 }
117
118 DEBUG(10,("read_block: block_size == 0x%x\n", block_size ));
119
120 /* set the offset, initialize the buffer, and read the block from disk */
121
122 if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
123 DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));
124 return -1;
125 }
126
127 if (!prs_init( ps, block_size, file->mem_ctx, UNMARSHALL )) {
128 DEBUG(0,("read_block: prs_init() failed! (%s)\n", strerror(errno) ));
129 return -1;
130 }
131 buffer = prs_data_p( ps );
132 bytes_read = returned = 0;
133
134 while ( bytes_read < block_size ) {
135 if ( (returned = read( file->fd, buffer+bytes_read, block_size-bytes_read )) == -1 ) {
136 DEBUG(0,("read_block: read() failed (%s)\n", strerror(errno) ));
137 return False;
138 }
139 if ( (returned == 0) && (bytes_read < block_size) ) {
140 DEBUG(0,("read_block: not a vald registry file ?\n" ));
141 return False;
142 }
143
144 bytes_read += returned;
145 }
146
147 return bytes_read;
148 }
149
150 /*******************************************************************
151 *******************************************************************/
152
153 static bool write_hbin_block( REGF_FILE *file, REGF_HBIN *hbin )
154 {
155 if ( !hbin->dirty )
156 return True;
157
158 /* write free space record if any is available */
159
160 if ( hbin->free_off != REGF_OFFSET_NONE ) {
161 uint32 header = 0xffffffff;
162
163 if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32) ) )
164 return False;
165 if ( !prs_uint32( "free_size", &hbin->ps, 0, &hbin->free_size ) )
166 return False;
167 if ( !prs_uint32( "free_header", &hbin->ps, 0, &header ) )
168 return False;
169 }
170
171 hbin->dirty = (write_block( file, &hbin->ps, hbin->file_off ) != -1);
172
173 return hbin->dirty;
174 }
175
176 /*******************************************************************
177 *******************************************************************/
178
179 static bool hbin_block_close( REGF_FILE *file, REGF_HBIN *hbin )
180 {
181 REGF_HBIN *p;
182
183 /* remove the block from the open list and flush it to disk */
184
185 for ( p=file->block_list; p && p!=hbin; p=p->next )
186 ;;
187
188 if ( p == hbin ) {
189 DLIST_REMOVE( file->block_list, hbin );
190 }
191 else
192 DEBUG(0,("hbin_block_close: block not in open list!\n"));
193
194 if ( !write_hbin_block( file, hbin ) )
195 return False;
196
197 return True;
198 }
199
200 /*******************************************************************
201 *******************************************************************/
202
203 static bool prs_regf_block( const char *desc, prs_struct *ps, int depth, REGF_FILE *file )
204 {
205 prs_debug(ps, depth, desc, "prs_regf_block");
206 depth++;
207
208 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)file->header, sizeof( file->header )) )
209 return False;
210
211 /* yes, these values are always identical so store them only once */
212
213 if ( !prs_uint32( "unknown1", ps, depth, &file->unknown1 ))
214 return False;
215 if ( !prs_uint32( "unknown1 (again)", ps, depth, &file->unknown1 ))
216 return False;
217
218 /* get the modtime */
219
220 if ( !prs_set_offset( ps, 0x0c ) )
221 return False;
222 if ( !smb_io_time( "modtime", &file->mtime, ps, depth ) )
223 return False;
224
225 /* constants */
226
227 if ( !prs_uint32( "unknown2", ps, depth, &file->unknown2 ))
228 return False;
229 if ( !prs_uint32( "unknown3", ps, depth, &file->unknown3 ))
230 return False;
231 if ( !prs_uint32( "unknown4", ps, depth, &file->unknown4 ))
232 return False;
233 if ( !prs_uint32( "unknown5", ps, depth, &file->unknown5 ))
234 return False;
235
236 /* get file offsets */
237
238 if ( !prs_set_offset( ps, 0x24 ) )
239 return False;
240 if ( !prs_uint32( "data_offset", ps, depth, &file->data_offset ))
241 return False;
242 if ( !prs_uint32( "last_block", ps, depth, &file->last_block ))
243 return False;
244
245 /* one more constant */
246
247 if ( !prs_uint32( "unknown6", ps, depth, &file->unknown6 ))
248 return False;
249
250 /* get the checksum */
251
252 if ( !prs_set_offset( ps, 0x01fc ) )
253 return False;
254 if ( !prs_uint32( "checksum", ps, depth, &file->checksum ))
255 return False;
256
257 return True;
258 }
259
260 /*******************************************************************
261 *******************************************************************/
262
263 static bool prs_hbin_block( const char *desc, prs_struct *ps, int depth, REGF_HBIN *hbin )
264 {
265 uint32 block_size2;
266
267 prs_debug(ps, depth, desc, "prs_regf_block");
268 depth++;
269
270 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)hbin->header, sizeof( hbin->header )) )
271 return False;
272
273 if ( !prs_uint32( "first_hbin_off", ps, depth, &hbin->first_hbin_off ))
274 return False;
275
276 /* The dosreg.cpp comments say that the block size is at 0x1c.
277 According to a WINXP NTUSER.dat file, this is wrong. The block_size
278 is at 0x08 */
279
280 if ( !prs_uint32( "block_size", ps, depth, &hbin->block_size ))
281 return False;
282
283 block_size2 = hbin->block_size;
284 prs_set_offset( ps, 0x1c );
285 if ( !prs_uint32( "block_size2", ps, depth, &block_size2 ))
286 return False;
287
288 if ( MARSHALLING(ps) )
289 hbin->dirty = True;
290
291
292 return True;
293 }
294
295 /*******************************************************************
296 *******************************************************************/
297
298 static bool prs_nk_rec( const char *desc, prs_struct *ps, int depth, REGF_NK_REC *nk )
299 {
300 uint16 class_length, name_length;
301 uint32 start;
302 uint32 data_size, start_off, end_off;
303 uint32 unknown_off = REGF_OFFSET_NONE;
304
305 nk->hbin_off = prs_offset( ps );
306 start = nk->hbin_off;
307
308 prs_debug(ps, depth, desc, "prs_nk_rec");
309 depth++;
310
311 /* back up and get the data_size */
312
313 if ( !prs_set_offset( ps, prs_offset(ps)-sizeof(uint32)) )
314 return False;
315 start_off = prs_offset( ps );
316 if ( !prs_uint32( "rec_size", ps, depth, &nk->rec_size ))
317 return False;
318
319 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)nk->header, sizeof( nk->header )) )
320 return False;
321
322 if ( !prs_uint16( "key_type", ps, depth, &nk->key_type ))
323 return False;
324 if ( !smb_io_time( "mtime", &nk->mtime, ps, depth ))
325 return False;
326
327 if ( !prs_set_offset( ps, start+0x0010 ) )
328 return False;
329 if ( !prs_uint32( "parent_off", ps, depth, &nk->parent_off ))
330 return False;
331 if ( !prs_uint32( "num_subkeys", ps, depth, &nk->num_subkeys ))
332 return False;
333
334 if ( !prs_set_offset( ps, start+0x001c ) )
335 return False;
336 if ( !prs_uint32( "subkeys_off", ps, depth, &nk->subkeys_off ))
337 return False;
338 if ( !prs_uint32( "unknown_off", ps, depth, &unknown_off) )
339 return False;
340
341 if ( !prs_set_offset( ps, start+0x0024 ) )
342 return False;
343 if ( !prs_uint32( "num_values", ps, depth, &nk->num_values ))
344 return False;
345 if ( !prs_uint32( "values_off", ps, depth, &nk->values_off ))
346 return False;
347 if ( !prs_uint32( "sk_off", ps, depth, &nk->sk_off ))
348 return False;
349 if ( !prs_uint32( "classname_off", ps, depth, &nk->classname_off ))
350 return False;
351
352 if ( !prs_uint32( "max_bytes_subkeyname", ps, depth, &nk->max_bytes_subkeyname))
353 return False;
354 if ( !prs_uint32( "max_bytes_subkeyclassname", ps, depth, &nk->max_bytes_subkeyclassname))
355 return False;
356 if ( !prs_uint32( "max_bytes_valuename", ps, depth, &nk->max_bytes_valuename))
357 return False;
358 if ( !prs_uint32( "max_bytes_value", ps, depth, &nk->max_bytes_value))
359 return False;
360 if ( !prs_uint32( "unknown index", ps, depth, &nk->unk_index))
361 return False;
362
363 name_length = nk->keyname ? strlen(nk->keyname) : 0 ;
364 class_length = nk->classname ? strlen(nk->classname) : 0 ;
365 if ( !prs_uint16( "name_length", ps, depth, &name_length ))
366 return False;
367 if ( !prs_uint16( "class_length", ps, depth, &class_length ))
368 return False;
369
370 if ( class_length ) {
371 ;;
372 }
373
374 if ( name_length ) {
375 if ( UNMARSHALLING(ps) ) {
376 if ( !(nk->keyname = PRS_ALLOC_MEM( ps, char, name_length+1 )) )
377 return False;
378 }
379
380 if ( !prs_uint8s( True, "name", ps, depth, (uint8*)nk->keyname, name_length) )
381 return False;
382
383 if ( UNMARSHALLING(ps) )
384 nk->keyname[name_length] = '\0';
385 }
386
387 end_off = prs_offset( ps );
388
389 /* data_size must be divisible by 8 and large enough to hold the original record */
390
391 data_size = ((start_off - end_off) & 0xfffffff8 );
392 if ( data_size > nk->rec_size )
393 DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, nk->rec_size));
394
395 if ( MARSHALLING(ps) )
396 nk->hbin->dirty = True;
397
398 return True;
399 }
400
401 /*******************************************************************
402 *******************************************************************/
403
404 static uint32 regf_block_checksum( prs_struct *ps )
405 {
406 char *buffer = prs_data_p( ps );
407 uint32 checksum, x;
408 int i;
409
410 /* XOR of all bytes 0x0000 - 0x01FB */
411
412 checksum = x = 0;
413
414 for ( i=0; i<0x01FB; i+=4 ) {
415 x = IVAL(buffer, i );
416 checksum ^= x;
417 }
418
419 return checksum;
420 }
421
422 /*******************************************************************
423 *******************************************************************/
424
425 static bool read_regf_block( REGF_FILE *file )
426 {
427 prs_struct ps;
428 uint32 checksum;
429
430 /* grab the first block from the file */
431
432 if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) == -1 )
433 return False;
434
435 /* parse the block and verify the checksum */
436
437 if ( !prs_regf_block( "regf_header", &ps, 0, file ) )
438 return False;
439
440 checksum = regf_block_checksum( &ps );
441
442 prs_mem_free( &ps );
443
444 if ( file->checksum != checksum ) {
445 DEBUG(0,("read_regf_block: invalid checksum\n" ));
446 return False;
447 }
448
449 return True;
450 }
451
452 /*******************************************************************
453 *******************************************************************/
454
455 static REGF_HBIN* read_hbin_block( REGF_FILE *file, off_t offset )
456 {
457 REGF_HBIN *hbin;
458 uint32 record_size, curr_off, block_size, header;
459
460 if ( !(hbin = TALLOC_ZERO_P(file->mem_ctx, REGF_HBIN)) )
461 return NULL;
462 hbin->file_off = offset;
463 hbin->free_off = -1;
464
465 if ( read_block( file, &hbin->ps, offset, 0 ) == -1 )
466 return NULL;
467
468 if ( !prs_hbin_block( "hbin", &hbin->ps, 0, hbin ) )
469 return NULL;
470
471 /* this should be the same thing as hbin->block_size but just in case */
472
473 block_size = prs_data_size( &hbin->ps );
474
475 /* Find the available free space offset. Always at the end,
476 so walk the record list and stop when you get to the end.
477 The end is defined by a record header of 0xffffffff. The
478 previous 4 bytes contains the amount of free space remaining
479 in the hbin block. */
480
481 /* remember that the record_size is in the 4 bytes preceeding the record itself */
482
483 if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE-sizeof(uint32) ) )
484 return False;
485
486 record_size = 0;
487 header = 0;
488 curr_off = prs_offset( &hbin->ps );
489 while ( header != 0xffffffff ) {
490 /* not done yet so reset the current offset to the
491 next record_size field */
492
493 curr_off = curr_off+record_size;
494
495 /* for some reason the record_size of the last record in
496 an hbin block can extend past the end of the block
497 even though the record fits within the remaining
498 space....aaarrrgggghhhhhh */
499
500 if ( curr_off >= block_size ) {
501 record_size = -1;
502 curr_off = -1;
503 break;
504 }
505
506 if ( !prs_set_offset( &hbin->ps, curr_off) )
507 return False;
508
509 if ( !prs_uint32( "rec_size", &hbin->ps, 0, &record_size ) )
510 return False;
511 if ( !prs_uint32( "header", &hbin->ps, 0, &header ) )
512 return False;
513
514 SMB_ASSERT( record_size != 0 );
515
516 if ( record_size & 0x80000000 ) {
517 /* absolute_value(record_size) */
518 record_size = (record_size ^ 0xffffffff) + 1;
519 }
520 }
521
522 /* save the free space offset */
523
524 if ( header == 0xffffffff ) {
525
526 /* account for the fact that the curr_off is 4 bytes behind the actual
527 record header */
528
529 hbin->free_off = curr_off + sizeof(uint32);
530 hbin->free_size = record_size;
531 }
532
533 DEBUG(10,("read_hbin_block: free space offset == 0x%x\n", hbin->free_off));
534
535 if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE ) )
536 return False;
537
538 return hbin;
539 }
540
541 /*******************************************************************
542 Input a random offset and receive the corresponding HBIN
543 block for it
544 *******************************************************************/
545
546 static bool hbin_contains_offset( REGF_HBIN *hbin, uint32 offset )
547 {
548 if ( !hbin )
549 return False;
550
551 if ( (offset > hbin->first_hbin_off) && (offset < (hbin->first_hbin_off+hbin->block_size)) )
552 return True;
553
554 return False;
555 }
556
557 /*******************************************************************
558 Input a random offset and receive the corresponding HBIN
559 block for it
560 *******************************************************************/
561
562 static REGF_HBIN* lookup_hbin_block( REGF_FILE *file, uint32 offset )
563 {
564 REGF_HBIN *hbin = NULL;
565 uint32 block_off;
566
567 /* start with the open list */
568
569 for ( hbin=file->block_list; hbin; hbin=hbin->next ) {
570 DEBUG(10,("lookup_hbin_block: address = 0x%x [0x%lx]\n", hbin->file_off, (unsigned long)hbin ));
571 if ( hbin_contains_offset( hbin, offset ) )
572 return hbin;
573 }
574
575 if ( !hbin ) {
576 /* start at the beginning */
577
578 block_off = REGF_BLOCKSIZE;
579 do {
580 /* cleanup before the next round */
581 if ( hbin )
582 prs_mem_free( &hbin->ps );
583
584 hbin = read_hbin_block( file, block_off );
585
586 if ( hbin )
587 block_off = hbin->file_off + hbin->block_size;
588
589 } while ( hbin && !hbin_contains_offset( hbin, offset ) );
590 }
591
592 if ( hbin )
593 DLIST_ADD( file->block_list, hbin );
594
595 return hbin;
596 }
597
598 /*******************************************************************
599 *******************************************************************/
600
601 static bool prs_hash_rec( const char *desc, prs_struct *ps, int depth, REGF_HASH_REC *hash )
602 {
603 prs_debug(ps, depth, desc, "prs_hash_rec");
604 depth++;
605
606 if ( !prs_uint32( "nk_off", ps, depth, &hash->nk_off ))
607 return False;
608 if ( !prs_uint8s( True, "keycheck", ps, depth, hash->keycheck, sizeof( hash->keycheck )) )
609 return False;
610
611 return True;
612 }
613
614 /*******************************************************************
615 *******************************************************************/
616
617 static bool hbin_prs_lf_records( const char *desc, REGF_HBIN *hbin, int depth, REGF_NK_REC *nk )
618 {
619 int i;
620 REGF_LF_REC *lf = &nk->subkeys;
621 uint32 data_size, start_off, end_off;
622
623 prs_debug(&hbin->ps, depth, desc, "prs_lf_records");
624 depth++;
625
626 /* check if we have anything to do first */
627
628 if ( nk->num_subkeys == 0 )
629 return True;
630
631 /* move to the LF record */
632
633 if ( !prs_set_offset( &hbin->ps, nk->subkeys_off + HBIN_HDR_SIZE - hbin->first_hbin_off ) )
634 return False;
635
636 /* backup and get the data_size */
637
638 if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
639 return False;
640 start_off = prs_offset( &hbin->ps );
641 if ( !prs_uint32( "rec_size", &hbin->ps, depth, &lf->rec_size ))
642 return False;
643
644 if ( !prs_uint8s( True, "header", &hbin->ps, depth, (uint8*)lf->header, sizeof( lf->header )) )
645 return False;
646
647 if ( !prs_uint16( "num_keys", &hbin->ps, depth, &lf->num_keys))
648 return False;
649
650 if ( UNMARSHALLING(&hbin->ps) ) {
651 if (lf->num_keys) {
652 if ( !(lf->hashes = PRS_ALLOC_MEM( &hbin->ps, REGF_HASH_REC, lf->num_keys )) )
653 return False;
654 } else {
655 lf->hashes = NULL;
656 }
657 }
658
659 for ( i=0; i<lf->num_keys; i++ ) {
660 if ( !prs_hash_rec( "hash_rec", &hbin->ps, depth, &lf->hashes[i] ) )
661 return False;
662 }
663
664 end_off = prs_offset( &hbin->ps );
665
666 /* data_size must be divisible by 8 and large enough to hold the original record */
667
668 data_size = ((start_off - end_off) & 0xfffffff8 );
669 if ( data_size > lf->rec_size )
670 DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, lf->rec_size));
671
672 if ( MARSHALLING(&hbin->ps) )
673 hbin->dirty = True;
674
675 return True;
676 }
677
678 /*******************************************************************
679 *******************************************************************/
680
681 static bool hbin_prs_sk_rec( const char *desc, REGF_HBIN *hbin, int depth, REGF_SK_REC *sk )
682 {
683 prs_struct *ps = &hbin->ps;
684 uint16 tag = 0xFFFF;
685 uint32 data_size, start_off, end_off;
686
687
688 prs_debug(ps, depth, desc, "hbin_prs_sk_rec");
689 depth++;
690
691 if ( !prs_set_offset( &hbin->ps, sk->sk_off + HBIN_HDR_SIZE - hbin->first_hbin_off ) )
692 return False;
693
694 /* backup and get the data_size */
695
696 if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
697 return False;
698 start_off = prs_offset( &hbin->ps );
699 if ( !prs_uint32( "rec_size", &hbin->ps, depth, &sk->rec_size ))
700 return False;
701
702 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)sk->header, sizeof( sk->header )) )
703 return False;
704 if ( !prs_uint16( "tag", ps, depth, &tag))
705 return False;
706
707 if ( !prs_uint32( "prev_sk_off", ps, depth, &sk->prev_sk_off))
708 return False;
709 if ( !prs_uint32( "next_sk_off", ps, depth, &sk->next_sk_off))
710 return False;
711 if ( !prs_uint32( "ref_count", ps, depth, &sk->ref_count))
712 return False;
713 if ( !prs_uint32( "size", ps, depth, &sk->size))
714 return False;
715
716 {
717 NTSTATUS status;
718 TALLOC_CTX *mem_ctx = prs_get_mem_context(&hbin->ps);
719 DATA_BLOB blob;
720
721 if (MARSHALLING(&hbin->ps)) {
722 status = marshall_sec_desc(mem_ctx,
723 sk->sec_desc,
724 &blob.data, &blob.length);
725 if (!NT_STATUS_IS_OK(status))
726 return False;
727 if (!prs_copy_data_in(&hbin->ps, (const char *)blob.data, blob.length))
728 return False;
729 } else {
730 blob = data_blob_const(prs_data_p(&hbin->ps),
731 prs_data_size(&hbin->ps));
732 status = unmarshall_sec_desc(mem_ctx,
733 blob.data, blob.length,
734 &sk->sec_desc);
735 if (!NT_STATUS_IS_OK(status))
736 return False;
737 prs_set_offset(&hbin->ps, blob.length);
738 }
739 }
740
741 end_off = prs_offset( &hbin->ps );
742
743 /* data_size must be divisible by 8 and large enough to hold the original record */
744
745 data_size = ((start_off - end_off) & 0xfffffff8 );
746 if ( data_size > sk->rec_size )
747 DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, sk->rec_size));
748
749 if ( MARSHALLING(&hbin->ps) )
750 hbin->dirty = True;
751
752 return True;
753 }
754
755 /*******************************************************************
756 *******************************************************************/
757
758 static bool hbin_prs_vk_rec( const char *desc, REGF_HBIN *hbin, int depth, REGF_VK_REC *vk, REGF_FILE *file )
759 {
760 uint32 offset;
761 uint16 name_length;
762 prs_struct *ps = &hbin->ps;
763 uint32 data_size, start_off, end_off;
764
765 prs_debug(ps, depth, desc, "prs_vk_rec");
766 depth++;
767
768 /* backup and get the data_size */
769
770 if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
771 return False;
772 start_off = prs_offset( &hbin->ps );
773 if ( !prs_uint32( "rec_size", &hbin->ps, depth, &vk->rec_size ))
774 return False;
775
776 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)vk->header, sizeof( vk->header )) )
777 return False;
778
779 if ( MARSHALLING(&hbin->ps) )
780 name_length = strlen(vk->valuename);
781
782 if ( !prs_uint16( "name_length", ps, depth, &name_length ))
783 return False;
784 if ( !prs_uint32( "data_size", ps, depth, &vk->data_size ))
785 return False;
786 if ( !prs_uint32( "data_off", ps, depth, &vk->data_off ))
787 return False;
788 if ( !prs_uint32( "type", ps, depth, &vk->type))
789 return False;
790 if ( !prs_uint16( "flag", ps, depth, &vk->flag))
791 return False;
792
793 offset = prs_offset( ps );
794 offset += 2; /* skip 2 bytes */
795 prs_set_offset( ps, offset );
796
797 /* get the name */
798
799 if ( vk->flag&VK_FLAG_NAME_PRESENT ) {
800
801 if ( UNMARSHALLING(&hbin->ps) ) {
802 if ( !(vk->valuename = PRS_ALLOC_MEM( ps, char, name_length+1 )))
803 return False;
804 }
805 if ( !prs_uint8s( True, "name", ps, depth, (uint8*)vk->valuename, name_length ) )
806 return False;
807 }
808
809 end_off = prs_offset( &hbin->ps );
810
811 /* get the data if necessary */
812
813 if ( vk->data_size != 0 ) {
814 bool charmode = False;
815
816 if ( (vk->type == REG_SZ) || (vk->type == REG_MULTI_SZ) )
817 charmode = True;
818
819 /* the data is stored in the offset if the size <= 4 */
820
821 if ( !(vk->data_size & VK_DATA_IN_OFFSET) ) {
822 REGF_HBIN *hblock = hbin;
823 uint32 data_rec_size;
824
825 if ( UNMARSHALLING(&hbin->ps) ) {
826 if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8, vk->data_size) ) )
827 return False;
828 }
829
830 /* this data can be in another hbin */
831 if ( !hbin_contains_offset( hbin, vk->data_off ) ) {
832 if ( !(hblock = lookup_hbin_block( file, vk->data_off )) )
833 return False;
834 }
835 if ( !(prs_set_offset( &hblock->ps, (vk->data_off+HBIN_HDR_SIZE-hblock->first_hbin_off)-sizeof(uint32) )) )
836 return False;
837
838 if ( MARSHALLING(&hblock->ps) ) {
839 data_rec_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
840 data_rec_size = ( data_rec_size - 1 ) ^ 0xFFFFFFFF;
841 }
842 if ( !prs_uint32( "data_rec_size", &hblock->ps, depth, &data_rec_size ))
843 return False;
844 if ( !prs_uint8s( charmode, "data", &hblock->ps, depth, vk->data, vk->data_size) )
845 return False;
846
847 if ( MARSHALLING(&hblock->ps) )
848 hblock->dirty = True;
849 }
850 else {
851 if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8, 4 ) ) )
852 return False;
853 SIVAL( vk->data, 0, vk->data_off );
854 }
855
856 }
857
858 /* data_size must be divisible by 8 and large enough to hold the original record */
859
860 data_size = ((start_off - end_off ) & 0xfffffff8 );
861 if ( data_size != vk->rec_size )
862 DEBUG(10,("prs_vk_rec: data_size check failed (0x%x < 0x%x)\n", data_size, vk->rec_size));
863
864 if ( MARSHALLING(&hbin->ps) )
865 hbin->dirty = True;
866
867 return True;
868 }
869
870 /*******************************************************************
871 read a VK record which is contained in the HBIN block stored
872 in the prs_struct *ps.
873 *******************************************************************/
874
875 static bool hbin_prs_vk_records( const char *desc, REGF_HBIN *hbin, int depth, REGF_NK_REC *nk, REGF_FILE *file )
876 {
877 int i;
878 uint32 record_size;
879
880 prs_debug(&hbin->ps, depth, desc, "prs_vk_records");
881 depth++;
882
883 /* check if we have anything to do first */
884
885 if ( nk->num_values == 0 )
886 return True;
887
888 if ( UNMARSHALLING(&hbin->ps) ) {
889 if ( !(nk->values = PRS_ALLOC_MEM( &hbin->ps, REGF_VK_REC, nk->num_values ) ) )
890 return False;
891 }
892
893 /* convert the offset to something relative to this HBIN block */
894
895 if ( !prs_set_offset( &hbin->ps, nk->values_off+HBIN_HDR_SIZE-hbin->first_hbin_off-sizeof(uint32)) )
896 return False;
897
898 if ( MARSHALLING( &hbin->ps) ) {
899 record_size = ( ( nk->num_values * sizeof(uint32) ) & 0xfffffff8 ) + 8;
900 record_size = (record_size - 1) ^ 0xFFFFFFFF;
901 }
902
903 if ( !prs_uint32( "record_size", &hbin->ps, depth, &record_size ) )
904 return False;
905
906 for ( i=0; i<nk->num_values; i++ ) {
907 if ( !prs_uint32( "vk_off", &hbin->ps, depth, &nk->values[i].rec_off ) )
908 return False;
909 }
910
911 for ( i=0; i<nk->num_values; i++ ) {
912 REGF_HBIN *sub_hbin = hbin;
913 uint32 new_offset;
914
915 if ( !hbin_contains_offset( hbin, nk->values[i].rec_off ) ) {
916 sub_hbin = lookup_hbin_block( file, nk->values[i].rec_off );
917 if ( !sub_hbin ) {
918 DEBUG(0,("hbin_prs_vk_records: Failed to find HBIN block containing offset [0x%x]\n",
919 nk->values[i].hbin_off));
920 return False;
921 }
922 }
923
924 new_offset = nk->values[i].rec_off + HBIN_HDR_SIZE - sub_hbin->first_hbin_off;
925 if ( !prs_set_offset( &sub_hbin->ps, new_offset ) )
926 return False;
927 if ( !hbin_prs_vk_rec( "vk_rec", sub_hbin, depth, &nk->values[i], file ) )
928 return False;
929 }
930
931 if ( MARSHALLING(&hbin->ps) )
932 hbin->dirty = True;
933
934
935 return True;
936 }
937
938
939 /*******************************************************************
940 *******************************************************************/
941
942 static REGF_SK_REC* find_sk_record_by_offset( REGF_FILE *file, uint32 offset )
943 {
944 REGF_SK_REC *p_sk;
945
946 for ( p_sk=file->sec_desc_list; p_sk; p_sk=p_sk->next ) {
947 if ( p_sk->sk_off == offset )
948 return p_sk;
949 }
950
951 return NULL;
952 }
953
954 /*******************************************************************
955 *******************************************************************/
956
957 static REGF_SK_REC* find_sk_record_by_sec_desc( REGF_FILE *file, struct security_descriptor *sd )
958 {
959 REGF_SK_REC *p;
960
961 for ( p=file->sec_desc_list; p; p=p->next ) {
962 if ( security_descriptor_equal( p->sec_desc, sd ) )
963 return p;
964 }
965
966 /* failure */
967
968 return NULL;
969 }
970
971 /*******************************************************************
972 *******************************************************************/
973
974 static bool hbin_prs_key( REGF_FILE *file, REGF_HBIN *hbin, REGF_NK_REC *nk )
975 {
976 int depth = 0;
977 REGF_HBIN *sub_hbin;
978
979 prs_debug(&hbin->ps, depth, "", "fetch_key");
980 depth++;
981
982 /* get the initial nk record */
983
984 if ( !prs_nk_rec( "nk_rec", &hbin->ps, depth, nk ))
985 return False;
986
987 /* fill in values */
988
989 if ( nk->num_values && (nk->values_off!=REGF_OFFSET_NONE) ) {
990 sub_hbin = hbin;
991 if ( !hbin_contains_offset( hbin, nk->values_off ) ) {
992 sub_hbin = lookup_hbin_block( file, nk->values_off );
993 if ( !sub_hbin ) {
994 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing value_list_offset [0x%x]\n",
995 nk->values_off));
996 return False;
997 }
998 }
999
1000 if ( !hbin_prs_vk_records( "vk_rec", sub_hbin, depth, nk, file ))
1001 return False;
1002 }
1003
1004 /* now get subkeys */
1005
1006 if ( nk->num_subkeys && (nk->subkeys_off!=REGF_OFFSET_NONE) ) {
1007 sub_hbin = hbin;
1008 if ( !hbin_contains_offset( hbin, nk->subkeys_off ) ) {
1009 sub_hbin = lookup_hbin_block( file, nk->subkeys_off );
1010 if ( !sub_hbin ) {
1011 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing subkey_offset [0x%x]\n",
1012 nk->subkeys_off));
1013 return False;
1014 }
1015 }
1016
1017 if ( !hbin_prs_lf_records( "lf_rec", sub_hbin, depth, nk ))
1018 return False;
1019 }
1020
1021 /* get the to the security descriptor. First look if we have already parsed it */
1022
1023 if ( (nk->sk_off!=REGF_OFFSET_NONE) && !( nk->sec_desc = find_sk_record_by_offset( file, nk->sk_off )) ) {
1024
1025 sub_hbin = hbin;
1026 if ( !hbin_contains_offset( hbin, nk->sk_off ) ) {
1027 sub_hbin = lookup_hbin_block( file, nk->sk_off );
1028 if ( !sub_hbin ) {
1029 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing sk_offset [0x%x]\n",
1030 nk->subkeys_off));
1031 return False;
1032 }
1033 }
1034
1035 if ( !(nk->sec_desc = TALLOC_ZERO_P( file->mem_ctx, REGF_SK_REC )) )
1036 return False;
1037 nk->sec_desc->sk_off = nk->sk_off;
1038 if ( !hbin_prs_sk_rec( "sk_rec", sub_hbin, depth, nk->sec_desc ))
1039 return False;
1040
1041 /* add to the list of security descriptors (ref_count has been read from the files) */
1042
1043 nk->sec_desc->sk_off = nk->sk_off;
1044 DLIST_ADD( file->sec_desc_list, nk->sec_desc );
1045 }
1046
1047 return True;
1048 }
1049
1050 /*******************************************************************
1051 *******************************************************************/
1052
1053 static bool next_record( REGF_HBIN *hbin, const char *hdr, bool *eob )
1054 {
1055 uint8 header[REC_HDR_SIZE];
1056 uint32 record_size;
1057 uint32 curr_off, block_size;
1058 bool found = False;
1059 prs_struct *ps = &hbin->ps;
1060
1061 curr_off = prs_offset( ps );
1062 if ( curr_off == 0 )
1063 prs_set_offset( ps, HBIN_HEADER_REC_SIZE );
1064
1065 /* assume that the current offset is at the record header
1066 and we need to backup to read the record size */
1067
1068 curr_off -= sizeof(uint32);
1069
1070 block_size = prs_data_size( ps );
1071 record_size = 0;
1072 memset( header, 0x0, sizeof(uint8)*REC_HDR_SIZE );
1073 while ( !found ) {
1074
1075 curr_off = curr_off+record_size;
1076 if ( curr_off >= block_size )
1077 break;
1078
1079 if ( !prs_set_offset( &hbin->ps, curr_off) )
1080 return False;
1081
1082 if ( !prs_uint32( "record_size", ps, 0, &record_size ) )
1083 return False;
1084 if ( !prs_uint8s( True, "header", ps, 0, header, REC_HDR_SIZE ) )
1085 return False;
1086
1087 if ( record_size & 0x80000000 ) {
1088 /* absolute_value(record_size) */
1089 record_size = (record_size ^ 0xffffffff) + 1;
1090 }
1091
1092 if ( memcmp( header, hdr, REC_HDR_SIZE ) == 0 ) {
1093 found = True;
1094 curr_off += sizeof(uint32);
1095 }
1096 }
1097
1098 /* mark prs_struct as done ( at end ) if no more SK records */
1099 /* mark end-of-block as True */
1100
1101 if ( !found ) {
1102 prs_set_offset( &hbin->ps, prs_data_size(&hbin->ps) );
1103 *eob = True;
1104 return False;
1105 }
1106
1107 if ( !prs_set_offset( ps, curr_off ) )
1108 return False;
1109
1110 return True;
1111 }
1112
1113 /*******************************************************************
1114 *******************************************************************/
1115
1116 static bool next_nk_record( REGF_FILE *file, REGF_HBIN *hbin, REGF_NK_REC *nk, bool *eob )
1117 {
1118 if ( next_record( hbin, "nk", eob ) && hbin_prs_key( file, hbin, nk ) )
1119 return True;
1120
1121 return False;
1122 }
1123
1124 /*******************************************************************
1125 Intialize the newly created REGF_BLOCK in *file and write the
1126 block header to disk
1127 *******************************************************************/
1128
1129 static bool init_regf_block( REGF_FILE *file )
1130 {
1131 prs_struct ps;
1132 bool result = True;
1133
1134 if ( !prs_init( &ps, REGF_BLOCKSIZE, file->mem_ctx, MARSHALL ) )
1135 return False;
1136
1137 memcpy( file->header, "regf", REGF_HDR_SIZE );
1138 file->data_offset = 0x20;
1139 file->last_block = 0x1000;
1140
1141 /* set mod time */
1142
1143 unix_to_nt_time( &file->mtime, time(NULL) );
1144
1145 /* hard coded values...no diea what these are ... maybe in time */
1146
1147 file->unknown1 = 0x2;
1148 file->unknown2 = 0x1;
1149 file->unknown3 = 0x3;
1150 file->unknown4 = 0x0;
1151 file->unknown5 = 0x1;
1152 file->unknown6 = 0x1;
1153
1154 /* write header to the buffer */
1155
1156 if ( !prs_regf_block( "regf_header", &ps, 0, file ) ) {
1157 result = False;
1158 goto out;
1159 }
1160
1161 /* calculate the checksum, re-marshall data (to include the checksum)
1162 and write to disk */
1163
1164 file->checksum = regf_block_checksum( &ps );
1165 prs_set_offset( &ps, 0 );
1166 if ( !prs_regf_block( "regf_header", &ps, 0, file ) ) {
1167 result = False;
1168 goto out;
1169 }
1170
1171 if ( write_block( file, &ps, 0 ) == -1 ) {
1172 DEBUG(0,("init_regf_block: Failed to initialize registry header block!\n"));
1173 result = False;
1174 goto out;
1175 }
1176
1177 out:
1178 prs_mem_free( &ps );
1179
1180 return result;
1181 }
1182 /*******************************************************************
1183 Open the registry file and then read in the REGF block to get the
1184 first hbin offset.
1185 *******************************************************************/
1186
1187 REGF_FILE* regfio_open( const char *filename, int flags, int mode )
1188 {
1189 REGF_FILE *rb;
1190
1191 if ( !(rb = SMB_MALLOC_P(REGF_FILE)) ) {
1192 DEBUG(0,("ERROR allocating memory\n"));
1193 return NULL;
1194 }
1195 ZERO_STRUCTP( rb );
1196 rb->fd = -1;
1197
1198 if ( !(rb->mem_ctx = talloc_init( "read_regf_block" )) ) {
1199 regfio_close( rb );
1200 return NULL;
1201 }
1202
1203 rb->open_flags = flags;
1204
1205 /* open and existing file */
1206
1207 if ( (rb->fd = open(filename, flags, mode)) == -1 ) {
1208 DEBUG(0,("regfio_open: failure to open %s (%s)\n", filename, strerror(errno)));
1209 regfio_close( rb );
1210 return NULL;
1211 }
1212
1213 /* check if we are creating a new file or overwriting an existing one */
1214
1215 if ( flags & (O_CREAT|O_TRUNC) ) {
1216 if ( !init_regf_block( rb ) ) {
1217 DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));
1218 regfio_close( rb );
1219 return NULL;
1220 }
1221
1222 /* success */
1223 return rb;
1224 }
1225
1226 /* read in an existing file */
1227
1228 if ( !read_regf_block( rb ) ) {
1229 DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));
1230 regfio_close( rb );
1231 return NULL;
1232 }
1233
1234 /* success */
1235
1236 return rb;
1237 }
1238
1239 /*******************************************************************
1240 *******************************************************************/
1241
1242 static void regfio_mem_free( REGF_FILE *file )
1243 {
1244 /* free any talloc()'d memory */
1245
1246 if ( file && file->mem_ctx )
1247 talloc_destroy( file->mem_ctx );
1248 }
1249
1250 /*******************************************************************
1251 *******************************************************************/
1252
1253 int regfio_close( REGF_FILE *file )
1254 {
1255 int fd;
1256
1257 /* cleanup for a file opened for write */
1258
1259 if ((file->fd != -1) && (file->open_flags & (O_WRONLY|O_RDWR))) {
1260 prs_struct ps;
1261 REGF_SK_REC *sk;
1262
1263 /* write of sd list */
1264
1265 for ( sk=file->sec_desc_list; sk; sk=sk->next ) {
1266 hbin_prs_sk_rec( "sk_rec", sk->hbin, 0, sk );
1267 }
1268
1269 /* flush any dirty blocks */
1270
1271 while ( file->block_list ) {
1272 hbin_block_close( file, file->block_list );
1273 }
1274
1275 ZERO_STRUCT( ps );
1276
1277 unix_to_nt_time( &file->mtime, time(NULL) );
1278
1279 if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) != -1 ) {
1280 /* now use for writing */
1281 prs_switch_type( &ps, MARSHALL );
1282
1283 /* stream the block once, generate the checksum,
1284 and stream it again */
1285 prs_set_offset( &ps, 0 );
1286 prs_regf_block( "regf_blocK", &ps, 0, file );
1287 file->checksum = regf_block_checksum( &ps );
1288 prs_set_offset( &ps, 0 );
1289 prs_regf_block( "regf_blocK", &ps, 0, file );
1290
1291 /* now we are ready to write it to disk */
1292 if ( write_block( file, &ps, 0 ) == -1 )
1293 DEBUG(0,("regfio_close: failed to update the regf header block!\n"));
1294 }
1295
1296 prs_mem_free( &ps );
1297 }
1298
1299 regfio_mem_free( file );
1300
1301 /* nothing tdo do if there is no open file */
1302
1303 if (file->fd == -1)
1304 return 0;
1305
1306 fd = file->fd;
1307 file->fd = -1;
1308 SAFE_FREE( file );
1309
1310 return close( fd );
1311 }
1312
1313 /*******************************************************************
1314 *******************************************************************/
1315
1316 static void regfio_flush( REGF_FILE *file )
1317 {
1318 REGF_HBIN *hbin;
1319
1320 for ( hbin=file->block_list; hbin; hbin=hbin->next ) {
1321 write_hbin_block( file, hbin );
1322 }
1323 }
1324
1325 /*******************************************************************
1326 There should be only *one* root key in the registry file based
1327 on my experience. --jerry
1328 *******************************************************************/
1329
1330 REGF_NK_REC* regfio_rootkey( REGF_FILE *file )
1331 {
1332 REGF_NK_REC *nk;
1333 REGF_HBIN *hbin;
1334 uint32 offset = REGF_BLOCKSIZE;
1335 bool found = False;
1336 bool eob;
1337
1338 if ( !file )
1339 return NULL;
1340
1341 if ( !(nk = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) ) {
1342 DEBUG(0,("regfio_rootkey: talloc() failed!\n"));
1343 return NULL;
1344 }
1345
1346 /* scan through the file on HBIN block at a time looking
1347 for an NK record with a type == 0x002c.
1348 Normally this is the first nk record in the first hbin
1349 block (but I'm not assuming that for now) */
1350
1351 while ( (hbin = read_hbin_block( file, offset )) ) {
1352 eob = False;
1353
1354 while ( !eob) {
1355 if ( next_nk_record( file, hbin, nk, &eob ) ) {
1356 if ( nk->key_type == NK_TYPE_ROOTKEY ) {
1357 found = True;
1358 break;
1359 }
1360 }
1361 prs_mem_free( &hbin->ps );
1362 }
1363
1364 if ( found )
1365 break;
1366
1367 offset += hbin->block_size;
1368 }
1369
1370 if ( !found ) {
1371 DEBUG(0,("regfio_rootkey: corrupt registry file ? No root key record located\n"));
1372 return NULL;
1373 }
1374
1375 DLIST_ADD( file->block_list, hbin );
1376
1377 return nk;
1378 }
1379
1380 /*******************************************************************
1381 This acts as an interator over the subkeys defined for a given
1382 NK record. Remember that offsets are from the *first* HBIN block.
1383 *******************************************************************/
1384
1385 REGF_NK_REC* regfio_fetch_subkey( REGF_FILE *file, REGF_NK_REC *nk )
1386 {
1387 REGF_NK_REC *subkey;
1388 REGF_HBIN *hbin;
1389 uint32 nk_offset;
1390
1391 /* see if there is anything left to report */
1392
1393 if ( !nk || (nk->subkeys_off==REGF_OFFSET_NONE) || (nk->subkey_index >= nk->num_subkeys) )
1394 return NULL;
1395
1396 /* find the HBIN block which should contain the nk record */
1397
1398 if ( !(hbin = lookup_hbin_block( file, nk->subkeys.hashes[nk->subkey_index].nk_off )) ) {
1399 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing offset [0x%x]\n",
1400 nk->subkeys.hashes[nk->subkey_index].nk_off));
1401 return NULL;
1402 }
1403
1404 nk_offset = nk->subkeys.hashes[nk->subkey_index].nk_off;
1405 if ( !prs_set_offset( &hbin->ps, (HBIN_HDR_SIZE + nk_offset - hbin->first_hbin_off) ) )
1406 return NULL;
1407
1408 nk->subkey_index++;
1409 if ( !(subkey = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) )
1410 return NULL;
1411
1412 if ( !hbin_prs_key( file, hbin, subkey ) )
1413 return NULL;
1414
1415 return subkey;
1416 }
1417
1418
1419 /*******************************************************************
1420 *******************************************************************/
1421
1422 static REGF_HBIN* regf_hbin_allocate( REGF_FILE *file, uint32 block_size )
1423 {
1424 REGF_HBIN *hbin;
1425 SMB_STRUCT_STAT sbuf;
1426
1427 if ( !(hbin = TALLOC_ZERO_P( file->mem_ctx, REGF_HBIN )) )
1428 return NULL;
1429
1430 memcpy( hbin->header, "hbin", sizeof(HBIN_HDR_SIZE) );
1431
1432
1433 if (sys_fstat(file->fd, &sbuf, false)) {
1434 DEBUG(0,("regf_hbin_allocate: stat() failed! (%s)\n", strerror(errno)));
1435 return NULL;
1436 }
1437
1438 hbin->file_off = sbuf.st_ex_size;
1439
1440 hbin->free_off = HBIN_HEADER_REC_SIZE;
1441 hbin->free_size = block_size - hbin->free_off + sizeof(uint32);;
1442
1443 hbin->block_size = block_size;
1444 hbin->first_hbin_off = hbin->file_off - REGF_BLOCKSIZE;
1445
1446 if ( !prs_init( &hbin->ps, block_size, file->mem_ctx, MARSHALL ) )
1447 return NULL;
1448
1449 if ( !prs_hbin_block( "new_hbin", &hbin->ps, 0, hbin ) )
1450 return NULL;
1451
1452 if ( !write_hbin_block( file, hbin ) )
1453 return NULL;
1454
1455 file->last_block = hbin->file_off;
1456
1457 return hbin;
1458 }
1459
1460 /*******************************************************************
1461 *******************************************************************/
1462
1463 static void update_free_space( REGF_HBIN *hbin, uint32 size_used )
1464 {
1465 hbin->free_off += size_used;
1466 hbin->free_size -= size_used;
1467
1468 if ( hbin->free_off >= hbin->block_size ) {
1469 hbin->free_off = REGF_OFFSET_NONE;
1470 }
1471
1472 return;
1473 }
1474
1475 /*******************************************************************
1476 *******************************************************************/
1477
1478 static REGF_HBIN* find_free_space( REGF_FILE *file, uint32 size )
1479 {
1480 REGF_HBIN *hbin, *p_hbin;
1481 uint32 block_off;
1482 bool cached;
1483
1484 /* check open block list */
1485
1486 for ( hbin=file->block_list; hbin!=NULL; hbin=hbin->next ) {
1487 /* only check blocks that actually have available space */
1488
1489 if ( hbin->free_off == REGF_OFFSET_NONE )
1490 continue;
1491
1492 /* check for a large enough available chunk */
1493
1494 if ( (hbin->block_size - hbin->free_off) >= size ) {
1495 DLIST_PROMOTE( file->block_list, hbin );
1496 goto done;
1497 }
1498 }
1499
1500 /* parse the file until we find a block with
1501 enough free space; save the last non-filled hbin */
1502
1503 block_off = REGF_BLOCKSIZE;
1504 do {
1505 /* cleanup before the next round */
1506 cached = False;
1507 if ( hbin )
1508 prs_mem_free( &hbin->ps );
1509
1510 hbin = read_hbin_block( file, block_off );
1511
1512 if ( hbin ) {
1513
1514 /* make sure that we don't already have this block in memory */
1515
1516 for ( p_hbin=file->block_list; p_hbin!=NULL; p_hbin=p_hbin->next ) {
1517 if ( p_hbin->file_off == hbin->file_off ) {
1518 cached = True;
1519 break;
1520 }
1521 }
1522
1523 block_off = hbin->file_off + hbin->block_size;
1524
1525 if ( cached ) {
1526 prs_mem_free( &hbin->ps );
1527 hbin = NULL;
1528 continue;
1529 }
1530 }
1531 /* if (cached block or (new block and not enough free space)) then continue looping */
1532 } while ( cached || (hbin && (hbin->free_size < size)) );
1533
1534 /* no free space; allocate a new one */
1535
1536 if ( !hbin ) {
1537 uint32 alloc_size;
1538
1539 /* allocate in multiples of REGF_ALLOC_BLOCK; make sure (size + hbin_header) fits */
1540
1541 alloc_size = (((size+HBIN_HEADER_REC_SIZE) / REGF_ALLOC_BLOCK ) + 1 ) * REGF_ALLOC_BLOCK;
1542
1543 if ( !(hbin = regf_hbin_allocate( file, alloc_size )) ) {
1544 DEBUG(0,("find_free_space: regf_hbin_allocate() failed!\n"));
1545 return NULL;
1546 }
1547 DLIST_ADD( file->block_list, hbin );
1548 }
1549
1550 done:
1551 /* set the offset to be ready to write */
1552
1553 if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32) ) )
1554 return NULL;
1555
1556 /* write the record size as a placeholder for now, it should be
1557 probably updated by the caller once it all of the data necessary
1558 for the record */
1559
1560 if ( !prs_uint32("allocated_size", &hbin->ps, 0, &size) )
1561 return False;
1562
1563 update_free_space( hbin, size );
1564
1565 return hbin;
1566 }
1567
1568 /*******************************************************************
1569 *******************************************************************/
1570
1571 static uint32 sk_record_data_size( struct security_descriptor * sd )
1572 {
1573 uint32 size, size_mod8;
1574
1575 size_mod8 = 0;
1576
1577 /* the record size is sizeof(hdr) + name + static members + data_size_field */
1578
1579 size = sizeof(uint32)*5 + ndr_size_security_descriptor(sd, 0) + sizeof(uint32);
1580
1581 /* multiple of 8 */
1582 size_mod8 = size & 0xfffffff8;
1583 if ( size_mod8 < size )
1584 size_mod8 += 8;
1585
1586 return size_mod8;
1587 }
1588
1589 /*******************************************************************
1590 *******************************************************************/
1591
1592 static uint32 vk_record_data_size( REGF_VK_REC *vk )
1593 {
1594 uint32 size, size_mod8;
1595
1596 size_mod8 = 0;
1597
1598 /* the record size is sizeof(hdr) + name + static members + data_size_field */
1599
1600 size = REC_HDR_SIZE + (sizeof(uint16)*3) + (sizeof(uint32)*3) + sizeof(uint32);
1601
1602 if ( vk->valuename )
1603 size += strlen(vk->valuename);
1604
1605 /* multiple of 8 */
1606 size_mod8 = size & 0xfffffff8;
1607 if ( size_mod8 < size )
1608 size_mod8 += 8;
1609
1610 return size_mod8;
1611 }
1612
1613 /*******************************************************************
1614 *******************************************************************/
1615
1616 static uint32 lf_record_data_size( uint32 num_keys )
1617 {
1618 uint32 size, size_mod8;
1619
1620 size_mod8 = 0;
1621
1622 /* the record size is sizeof(hdr) + num_keys + sizeof of hash_array + data_size_uint32 */
1623
1624 size = REC_HDR_SIZE + sizeof(uint16) + (sizeof(REGF_HASH_REC) * num_keys) + sizeof(uint32);
1625
1626 /* multiple of 8 */
1627 size_mod8 = size & 0xfffffff8;
1628 if ( size_mod8 < size )
1629 size_mod8 += 8;
1630
1631 return size_mod8;
1632 }
1633
1634 /*******************************************************************
1635 *******************************************************************/
1636
1637 static uint32 nk_record_data_size( REGF_NK_REC *nk )
1638 {
1639 uint32 size, size_mod8;
1640
1641 size_mod8 = 0;
1642
1643 /* the record size is static + length_of_keyname + length_of_classname + data_size_uint32 */
1644
1645 size = 0x4c + strlen(nk->keyname) + sizeof(uint32);
1646
1647 if ( nk->classname )
1648 size += strlen( nk->classname );
1649
1650 /* multiple of 8 */
1651 size_mod8 = size & 0xfffffff8;
1652 if ( size_mod8 < size )
1653 size_mod8 += 8;
1654
1655 return size_mod8;
1656 }
1657
1658 /*******************************************************************
1659 *******************************************************************/
1660
1661 static bool create_vk_record(REGF_FILE *file, REGF_VK_REC *vk,
1662 struct regval_blob *value)
1663 {
1664 char *name = regval_name(value);
1665 REGF_HBIN *data_hbin;
1666
1667 ZERO_STRUCTP( vk );
1668
1669 memcpy( vk->header, "vk", REC_HDR_SIZE );
1670
1671 if ( name ) {
1672 vk->valuename = talloc_strdup( file->mem_ctx, regval_name(value) );
1673 vk->flag = VK_FLAG_NAME_PRESENT;
1674 }
1675
1676 vk->data_size = regval_size( value );
1677 vk->type = regval_type( value );
1678
1679 if ( vk->data_size > sizeof(uint32) ) {
1680 uint32 data_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
1681
1682 vk->data = (uint8 *)TALLOC_MEMDUP( file->mem_ctx,
1683 regval_data_p(value),
1684 vk->data_size );
1685 if (vk->data == NULL) {
1686 return False;
1687 }
1688
1689 /* go ahead and store the offset....we'll pick this hbin block back up when
1690 we stream the data */
1691
1692 if ((data_hbin = find_free_space(file, data_size )) == NULL) {
1693 return False;
1694 }
1695 vk->data_off = prs_offset( &data_hbin->ps ) + data_hbin->first_hbin_off - HBIN_HDR_SIZE;
1696 }
1697 else {
1698 /* make sure we don't try to copy from a NULL value pointer */
1699
1700 if ( vk->data_size != 0 )
1701 memcpy( &vk->data_off, regval_data_p(value), sizeof(uint32) );
1702 vk->data_size |= VK_DATA_IN_OFFSET;
1703 }
1704
1705 return True;
1706 }
1707
1708 /*******************************************************************
1709 *******************************************************************/
1710
1711 static int hashrec_cmp( REGF_HASH_REC *h1, REGF_HASH_REC *h2 )
1712 {
1713 return StrCaseCmp( h1->fullname, h2->fullname );
1714 }
1715
1716 /*******************************************************************
1717 *******************************************************************/
1718
1719 REGF_NK_REC* regfio_write_key( REGF_FILE *file, const char *name,
1720 struct regval_ctr *values, struct regsubkey_ctr *subkeys,
1721 struct security_descriptor *sec_desc, REGF_NK_REC *parent )
1722 {
1723 REGF_NK_REC *nk;
1724 REGF_HBIN *vlist_hbin = NULL;
1725 uint32 size;
1726
1727 if ( !(nk = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) )
1728 return NULL;
1729
1730 memcpy( nk->header, "nk", REC_HDR_SIZE );
1731
1732 if ( !parent )
1733 nk->key_type = NK_TYPE_ROOTKEY;
1734 else
1735 nk->key_type = NK_TYPE_NORMALKEY;
1736
1737 /* store the parent offset (or -1 if a the root key */
1738
1739 nk->parent_off = parent ? (parent->hbin_off + parent->hbin->file_off - REGF_BLOCKSIZE - HBIN_HDR_SIZE ) : REGF_OFFSET_NONE;
1740
1741 /* no classname currently */
1742
1743 nk->classname_off = REGF_OFFSET_NONE;
1744 nk->classname = NULL;
1745 nk->keyname = talloc_strdup( file->mem_ctx, name );
1746
1747 /* current modification time */
1748
1749 unix_to_nt_time( &nk->mtime, time(NULL) );
1750
1751 /* allocate the record on disk */
1752
1753 size = nk_record_data_size( nk );
1754 nk->rec_size = ( size - 1 ) ^ 0XFFFFFFFF;
1755 if ((nk->hbin = find_free_space( file, size )) == NULL) {
1756 return NULL;
1757 }
1758 nk->hbin_off = prs_offset( &nk->hbin->ps );
1759
1760 /* Update the hash record in the parent */
1761
1762 if ( parent ) {
1763 REGF_HASH_REC *hash = &parent->subkeys.hashes[parent->subkey_index];
1764
1765 hash->nk_off = prs_offset( &nk->hbin->ps ) + nk->hbin->first_hbin_off - HBIN_HDR_SIZE;
1766 memcpy( hash->keycheck, name, sizeof(uint32) );
1767 hash->fullname = talloc_strdup( file->mem_ctx, name );
1768 parent->subkey_index++;
1769
1770 /* sort the list by keyname */
1771 TYPESAFE_QSORT(parent->subkeys.hashes, parent->subkey_index, 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, 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 ( DLIST_PREV(nk->sec_desc) ) {
1819 REGF_SK_REC *prev = DLIST_PREV(nk->sec_desc);
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