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Fix smbclient/tarmode panic on connecting to Windows 2000 clients.
[Samba.git] / source3 / registry / regfio.c
blobc56cfbdb3b6b72f583fe91eef28e90bdbb1a2ea6
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 "system/filesys.h"
22 #include "regfio.h"
23 #include "../librpc/gen_ndr/ndr_security.h"
24 #include "../libcli/security/security_descriptor.h"
25
26 #undef DBGC_CLASS
27 #define DBGC_CLASS DBGC_REGISTRY
28
29 /*******************************************************************
30 *
31 * TODO : Right now this code basically ignores classnames.
32 *
33 ******************************************************************/
34
35 #if defined(PARANOID_MALLOC_CHECKER)
36 #define PRS_ALLOC_MEM(ps, type, count) (type *)prs_alloc_mem_((ps),sizeof(type),(count))
37 #else
38 #define PRS_ALLOC_MEM(ps, type, count) (type *)prs_alloc_mem((ps),sizeof(type),(count))
39 #endif
40
41 /*******************************************************************
42 Reads or writes an NTTIME structure.
43 ********************************************************************/
44
45 static bool smb_io_time(const char *desc, NTTIME *nttime, prs_struct *ps, int depth)
46 {
47 uint32 low, high;
48 if (nttime == NULL)
49 return False;
50
51 prs_debug(ps, depth, desc, "smb_io_time");
52 depth++;
53
54 if(!prs_align(ps))
55 return False;
56
57 if (MARSHALLING(ps)) {
58 low = *nttime & 0xFFFFFFFF;
59 high = *nttime >> 32;
60 }
61
62 if(!prs_uint32("low ", ps, depth, &low)) /* low part */
63 return False;
64 if(!prs_uint32("high", ps, depth, &high)) /* high part */
65 return False;
66
67 if (UNMARSHALLING(ps)) {
68 *nttime = (((uint64_t)high << 32) + low);
69 }
70
71 return True;
72 }
73
74 /*******************************************************************
75 *******************************************************************/
76
77 static int write_block( REGF_FILE *file, prs_struct *ps, uint32 offset )
78 {
79 int bytes_written, returned;
80 char *buffer = prs_data_p( ps );
81 uint32 buffer_size = prs_data_size( ps );
82 SMB_STRUCT_STAT sbuf;
83
84 if ( file->fd == -1 )
85 return -1;
86
87 /* check for end of file */
88
89 if (sys_fstat(file->fd, &sbuf, false)) {
90 DEBUG(0,("write_block: stat() failed! (%s)\n", strerror(errno)));
91 return -1;
92 }
93
94 if ( lseek( file->fd, offset, SEEK_SET ) == -1 ) {
95 DEBUG(0,("write_block: lseek() failed! (%s)\n", strerror(errno) ));
96 return -1;
97 }
98
99 bytes_written = returned = 0;
100 while ( bytes_written < buffer_size ) {
101 if ( (returned = write( file->fd, buffer+bytes_written, buffer_size-bytes_written )) == -1 ) {
102 DEBUG(0,("write_block: write() failed! (%s)\n", strerror(errno) ));
103 return False;
104 }
105
106 bytes_written += returned;
107 }
108
109 return bytes_written;
110 }
111
112 /*******************************************************************
113 *******************************************************************/
114
115 static int read_block( REGF_FILE *file, prs_struct *ps, uint32 file_offset, uint32 block_size )
116 {
117 int bytes_read, returned;
118 char *buffer;
119 SMB_STRUCT_STAT sbuf;
120
121 /* check for end of file */
122
123 if (sys_fstat(file->fd, &sbuf, false)) {
124 DEBUG(0,("read_block: stat() failed! (%s)\n", strerror(errno)));
125 return -1;
126 }
127
128 if ( (size_t)file_offset >= sbuf.st_ex_size )
129 return -1;
130
131 /* if block_size == 0, we are parsing HBIN records and need
132 to read some of the header to get the block_size from there */
133
134 if ( block_size == 0 ) {
135 char hdr[0x20];
136
137 if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
138 DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));
139 return -1;
140 }
141
142 returned = read( file->fd, hdr, 0x20 );
143 if ( (returned == -1) || (returned < 0x20) ) {
144 DEBUG(0,("read_block: failed to read in HBIN header. Is the file corrupt?\n"));
145 return -1;
146 }
147
148 /* make sure this is an hbin header */
149
150 if ( strncmp( hdr, "hbin", HBIN_HDR_SIZE ) != 0 ) {
151 DEBUG(0,("read_block: invalid block header!\n"));
152 return -1;
153 }
154
155 block_size = IVAL( hdr, 0x08 );
156 }
157
158 DEBUG(10,("read_block: block_size == 0x%x\n", block_size ));
159
160 /* set the offset, initialize the buffer, and read the block from disk */
161
162 if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
163 DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));
164 return -1;
165 }
166
167 if (!prs_init( ps, block_size, file->mem_ctx, UNMARSHALL )) {
168 DEBUG(0,("read_block: prs_init() failed! (%s)\n", strerror(errno) ));
169 return -1;
170 }
171 buffer = prs_data_p( ps );
172 bytes_read = returned = 0;
173
174 while ( bytes_read < block_size ) {
175 if ( (returned = read( file->fd, buffer+bytes_read, block_size-bytes_read )) == -1 ) {
176 DEBUG(0,("read_block: read() failed (%s)\n", strerror(errno) ));
177 return False;
178 }
179 if ( (returned == 0) && (bytes_read < block_size) ) {
180 DEBUG(0,("read_block: not a vald registry file ?\n" ));
181 return False;
182 }
183
184 bytes_read += returned;
185 }
186
187 return bytes_read;
188 }
189
190 /*******************************************************************
191 *******************************************************************/
192
193 static bool write_hbin_block( REGF_FILE *file, REGF_HBIN *hbin )
194 {
195 if ( !hbin->dirty )
196 return True;
197
198 /* write free space record if any is available */
199
200 if ( hbin->free_off != REGF_OFFSET_NONE ) {
201 uint32 header = 0xffffffff;
202
203 if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32) ) )
204 return False;
205 if ( !prs_uint32( "free_size", &hbin->ps, 0, &hbin->free_size ) )
206 return False;
207 if ( !prs_uint32( "free_header", &hbin->ps, 0, &header ) )
208 return False;
209 }
210
211 hbin->dirty = (write_block( file, &hbin->ps, hbin->file_off ) != -1);
212
213 return hbin->dirty;
214 }
215
216 /*******************************************************************
217 *******************************************************************/
218
219 static bool hbin_block_close( REGF_FILE *file, REGF_HBIN *hbin )
220 {
221 REGF_HBIN *p;
222
223 /* remove the block from the open list and flush it to disk */
224
225 for ( p=file->block_list; p && p!=hbin; p=p->next )
226 ;;
227
228 if ( p == hbin ) {
229 DLIST_REMOVE( file->block_list, hbin );
230 }
231 else
232 DEBUG(0,("hbin_block_close: block not in open list!\n"));
233
234 if ( !write_hbin_block( file, hbin ) )
235 return False;
236
237 return True;
238 }
239
240 /*******************************************************************
241 *******************************************************************/
242
243 static bool prs_regf_block( const char *desc, prs_struct *ps, int depth, REGF_FILE *file )
244 {
245 prs_debug(ps, depth, desc, "prs_regf_block");
246 depth++;
247
248 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)file->header, sizeof( file->header )) )
249 return False;
250
251 /* yes, these values are always identical so store them only once */
252
253 if ( !prs_uint32( "unknown1", ps, depth, &file->unknown1 ))
254 return False;
255 if ( !prs_uint32( "unknown1 (again)", ps, depth, &file->unknown1 ))
256 return False;
257
258 /* get the modtime */
259
260 if ( !prs_set_offset( ps, 0x0c ) )
261 return False;
262 if ( !smb_io_time( "modtime", &file->mtime, ps, depth ) )
263 return False;
264
265 /* constants */
266
267 if ( !prs_uint32( "unknown2", ps, depth, &file->unknown2 ))
268 return False;
269 if ( !prs_uint32( "unknown3", ps, depth, &file->unknown3 ))
270 return False;
271 if ( !prs_uint32( "unknown4", ps, depth, &file->unknown4 ))
272 return False;
273 if ( !prs_uint32( "unknown5", ps, depth, &file->unknown5 ))
274 return False;
275
276 /* get file offsets */
277
278 if ( !prs_set_offset( ps, 0x24 ) )
279 return False;
280 if ( !prs_uint32( "data_offset", ps, depth, &file->data_offset ))
281 return False;
282 if ( !prs_uint32( "last_block", ps, depth, &file->last_block ))
283 return False;
284
285 /* one more constant */
286
287 if ( !prs_uint32( "unknown6", ps, depth, &file->unknown6 ))
288 return False;
289
290 /* get the checksum */
291
292 if ( !prs_set_offset( ps, 0x01fc ) )
293 return False;
294 if ( !prs_uint32( "checksum", ps, depth, &file->checksum ))
295 return False;
296
297 return True;
298 }
299
300 /*******************************************************************
301 *******************************************************************/
302
303 static bool prs_hbin_block( const char *desc, prs_struct *ps, int depth, REGF_HBIN *hbin )
304 {
305 uint32 block_size2;
306
307 prs_debug(ps, depth, desc, "prs_regf_block");
308 depth++;
309
310 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)hbin->header, sizeof( hbin->header )) )
311 return False;
312
313 if ( !prs_uint32( "first_hbin_off", ps, depth, &hbin->first_hbin_off ))
314 return False;
315
316 /* The dosreg.cpp comments say that the block size is at 0x1c.
317 According to a WINXP NTUSER.dat file, this is wrong. The block_size
318 is at 0x08 */
319
320 if ( !prs_uint32( "block_size", ps, depth, &hbin->block_size ))
321 return False;
322
323 block_size2 = hbin->block_size;
324 prs_set_offset( ps, 0x1c );
325 if ( !prs_uint32( "block_size2", ps, depth, &block_size2 ))
326 return False;
327
328 if ( MARSHALLING(ps) )
329 hbin->dirty = True;
330
331
332 return True;
333 }
334
335 /*******************************************************************
336 *******************************************************************/
337
338 static bool prs_nk_rec( const char *desc, prs_struct *ps, int depth, REGF_NK_REC *nk )
339 {
340 uint16 class_length, name_length;
341 uint32 start;
342 uint32 data_size, start_off, end_off;
343 uint32 unknown_off = REGF_OFFSET_NONE;
344
345 nk->hbin_off = prs_offset( ps );
346 start = nk->hbin_off;
347
348 prs_debug(ps, depth, desc, "prs_nk_rec");
349 depth++;
350
351 /* back up and get the data_size */
352
353 if ( !prs_set_offset( ps, prs_offset(ps)-sizeof(uint32)) )
354 return False;
355 start_off = prs_offset( ps );
356 if ( !prs_uint32( "rec_size", ps, depth, &nk->rec_size ))
357 return False;
358
359 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)nk->header, sizeof( nk->header )) )
360 return False;
361
362 if ( !prs_uint16( "key_type", ps, depth, &nk->key_type ))
363 return False;
364 if ( !smb_io_time( "mtime", &nk->mtime, ps, depth ))
365 return False;
366
367 if ( !prs_set_offset( ps, start+0x0010 ) )
368 return False;
369 if ( !prs_uint32( "parent_off", ps, depth, &nk->parent_off ))
370 return False;
371 if ( !prs_uint32( "num_subkeys", ps, depth, &nk->num_subkeys ))
372 return False;
373
374 if ( !prs_set_offset( ps, start+0x001c ) )
375 return False;
376 if ( !prs_uint32( "subkeys_off", ps, depth, &nk->subkeys_off ))
377 return False;
378 if ( !prs_uint32( "unknown_off", ps, depth, &unknown_off) )
379 return False;
380
381 if ( !prs_set_offset( ps, start+0x0024 ) )
382 return False;
383 if ( !prs_uint32( "num_values", ps, depth, &nk->num_values ))
384 return False;
385 if ( !prs_uint32( "values_off", ps, depth, &nk->values_off ))
386 return False;
387 if ( !prs_uint32( "sk_off", ps, depth, &nk->sk_off ))
388 return False;
389 if ( !prs_uint32( "classname_off", ps, depth, &nk->classname_off ))
390 return False;
391
392 if ( !prs_uint32( "max_bytes_subkeyname", ps, depth, &nk->max_bytes_subkeyname))
393 return False;
394 if ( !prs_uint32( "max_bytes_subkeyclassname", ps, depth, &nk->max_bytes_subkeyclassname))
395 return False;
396 if ( !prs_uint32( "max_bytes_valuename", ps, depth, &nk->max_bytes_valuename))
397 return False;
398 if ( !prs_uint32( "max_bytes_value", ps, depth, &nk->max_bytes_value))
399 return False;
400 if ( !prs_uint32( "unknown index", ps, depth, &nk->unk_index))
401 return False;
402
403 name_length = nk->keyname ? strlen(nk->keyname) : 0 ;
404 class_length = nk->classname ? strlen(nk->classname) : 0 ;
405 if ( !prs_uint16( "name_length", ps, depth, &name_length ))
406 return False;
407 if ( !prs_uint16( "class_length", ps, depth, &class_length ))
408 return False;
409
410 if ( class_length ) {
411 ;;
412 }
413
414 if ( name_length ) {
415 if ( UNMARSHALLING(ps) ) {
416 if ( !(nk->keyname = PRS_ALLOC_MEM( ps, char, name_length+1 )) )
417 return False;
418 }
419
420 if ( !prs_uint8s( True, "name", ps, depth, (uint8*)nk->keyname, name_length) )
421 return False;
422
423 if ( UNMARSHALLING(ps) )
424 nk->keyname[name_length] = '\0';
425 }
426
427 end_off = prs_offset( ps );
428
429 /* data_size must be divisible by 8 and large enough to hold the original record */
430
431 data_size = ((start_off - end_off) & 0xfffffff8 );
432 if ( data_size > nk->rec_size )
433 DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, nk->rec_size));
434
435 if ( MARSHALLING(ps) )
436 nk->hbin->dirty = True;
437
438 return True;
439 }
440
441 /*******************************************************************
442 *******************************************************************/
443
444 static uint32 regf_block_checksum( prs_struct *ps )
445 {
446 char *buffer = prs_data_p( ps );
447 uint32 checksum, x;
448 int i;
449
450 /* XOR of all bytes 0x0000 - 0x01FB */
451
452 checksum = x = 0;
453
454 for ( i=0; i<0x01FB; i+=4 ) {
455 x = IVAL(buffer, i );
456 checksum ^= x;
457 }
458
459 return checksum;
460 }
461
462 /*******************************************************************
463 *******************************************************************/
464
465 static bool read_regf_block( REGF_FILE *file )
466 {
467 prs_struct ps;
468 uint32 checksum;
469
470 /* grab the first block from the file */
471
472 if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) == -1 )
473 return False;
474
475 /* parse the block and verify the checksum */
476
477 if ( !prs_regf_block( "regf_header", &ps, 0, file ) )
478 return False;
479
480 checksum = regf_block_checksum( &ps );
481
482 prs_mem_free( &ps );
483
484 if ( file->checksum != checksum ) {
485 DEBUG(0,("read_regf_block: invalid checksum\n" ));
486 return False;
487 }
488
489 return True;
490 }
491
492 /*******************************************************************
493 *******************************************************************/
494
495 static REGF_HBIN* read_hbin_block( REGF_FILE *file, off_t offset )
496 {
497 REGF_HBIN *hbin;
498 uint32 record_size, curr_off, block_size, header;
499
500 if ( !(hbin = TALLOC_ZERO_P(file->mem_ctx, REGF_HBIN)) )
501 return NULL;
502 hbin->file_off = offset;
503 hbin->free_off = -1;
504
505 if ( read_block( file, &hbin->ps, offset, 0 ) == -1 )
506 return NULL;
507
508 if ( !prs_hbin_block( "hbin", &hbin->ps, 0, hbin ) )
509 return NULL;
510
511 /* this should be the same thing as hbin->block_size but just in case */
512
513 block_size = prs_data_size( &hbin->ps );
514
515 /* Find the available free space offset. Always at the end,
516 so walk the record list and stop when you get to the end.
517 The end is defined by a record header of 0xffffffff. The
518 previous 4 bytes contains the amount of free space remaining
519 in the hbin block. */
520
521 /* remember that the record_size is in the 4 bytes preceeding the record itself */
522
523 if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE-sizeof(uint32) ) )
524 return False;
525
526 record_size = 0;
527 header = 0;
528 curr_off = prs_offset( &hbin->ps );
529 while ( header != 0xffffffff ) {
530 /* not done yet so reset the current offset to the
531 next record_size field */
532
533 curr_off = curr_off+record_size;
534
535 /* for some reason the record_size of the last record in
536 an hbin block can extend past the end of the block
537 even though the record fits within the remaining
538 space....aaarrrgggghhhhhh */
539
540 if ( curr_off >= block_size ) {
541 record_size = -1;
542 curr_off = -1;
543 break;
544 }
545
546 if ( !prs_set_offset( &hbin->ps, curr_off) )
547 return False;
548
549 if ( !prs_uint32( "rec_size", &hbin->ps, 0, &record_size ) )
550 return False;
551 if ( !prs_uint32( "header", &hbin->ps, 0, &header ) )
552 return False;
553
554 SMB_ASSERT( record_size != 0 );
555
556 if ( record_size & 0x80000000 ) {
557 /* absolute_value(record_size) */
558 record_size = (record_size ^ 0xffffffff) + 1;
559 }
560 }
561
562 /* save the free space offset */
563
564 if ( header == 0xffffffff ) {
565
566 /* account for the fact that the curr_off is 4 bytes behind the actual
567 record header */
568
569 hbin->free_off = curr_off + sizeof(uint32);
570 hbin->free_size = record_size;
571 }
572
573 DEBUG(10,("read_hbin_block: free space offset == 0x%x\n", hbin->free_off));
574
575 if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE ) )
576 return False;
577
578 return hbin;
579 }
580
581 /*******************************************************************
582 Input a random offset and receive the corresponding HBIN
583 block for it
584 *******************************************************************/
585
586 static bool hbin_contains_offset( REGF_HBIN *hbin, uint32 offset )
587 {
588 if ( !hbin )
589 return False;
590
591 if ( (offset > hbin->first_hbin_off) && (offset < (hbin->first_hbin_off+hbin->block_size)) )
592 return True;
593
594 return False;
595 }
596
597 /*******************************************************************
598 Input a random offset and receive the corresponding HBIN
599 block for it
600 *******************************************************************/
601
602 static REGF_HBIN* lookup_hbin_block( REGF_FILE *file, uint32 offset )
603 {
604 REGF_HBIN *hbin = NULL;
605 uint32 block_off;
606
607 /* start with the open list */
608
609 for ( hbin=file->block_list; hbin; hbin=hbin->next ) {
610 DEBUG(10,("lookup_hbin_block: address = 0x%x [0x%lx]\n", hbin->file_off, (unsigned long)hbin ));
611 if ( hbin_contains_offset( hbin, offset ) )
612 return hbin;
613 }
614
615 if ( !hbin ) {
616 /* start at the beginning */
617
618 block_off = REGF_BLOCKSIZE;
619 do {
620 /* cleanup before the next round */
621 if ( hbin )
622 prs_mem_free( &hbin->ps );
623
624 hbin = read_hbin_block( file, block_off );
625
626 if ( hbin )
627 block_off = hbin->file_off + hbin->block_size;
628
629 } while ( hbin && !hbin_contains_offset( hbin, offset ) );
630 }
631
632 if ( hbin )
633 DLIST_ADD( file->block_list, hbin );
634
635 return hbin;
636 }
637
638 /*******************************************************************
639 *******************************************************************/
640
641 static bool prs_hash_rec( const char *desc, prs_struct *ps, int depth, REGF_HASH_REC *hash )
642 {
643 prs_debug(ps, depth, desc, "prs_hash_rec");
644 depth++;
645
646 if ( !prs_uint32( "nk_off", ps, depth, &hash->nk_off ))
647 return False;
648 if ( !prs_uint8s( True, "keycheck", ps, depth, hash->keycheck, sizeof( hash->keycheck )) )
649 return False;
650
651 return True;
652 }
653
654 /*******************************************************************
655 *******************************************************************/
656
657 static bool hbin_prs_lf_records( const char *desc, REGF_HBIN *hbin, int depth, REGF_NK_REC *nk )
658 {
659 int i;
660 REGF_LF_REC *lf = &nk->subkeys;
661 uint32 data_size, start_off, end_off;
662
663 prs_debug(&hbin->ps, depth, desc, "prs_lf_records");
664 depth++;
665
666 /* check if we have anything to do first */
667
668 if ( nk->num_subkeys == 0 )
669 return True;
670
671 /* move to the LF record */
672
673 if ( !prs_set_offset( &hbin->ps, nk->subkeys_off + HBIN_HDR_SIZE - hbin->first_hbin_off ) )
674 return False;
675
676 /* backup and get the data_size */
677
678 if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
679 return False;
680 start_off = prs_offset( &hbin->ps );
681 if ( !prs_uint32( "rec_size", &hbin->ps, depth, &lf->rec_size ))
682 return False;
683
684 if ( !prs_uint8s( True, "header", &hbin->ps, depth, (uint8*)lf->header, sizeof( lf->header )) )
685 return False;
686
687 if ( !prs_uint16( "num_keys", &hbin->ps, depth, &lf->num_keys))
688 return False;
689
690 if ( UNMARSHALLING(&hbin->ps) ) {
691 if (lf->num_keys) {
692 if ( !(lf->hashes = PRS_ALLOC_MEM( &hbin->ps, REGF_HASH_REC, lf->num_keys )) )
693 return False;
694 } else {
695 lf->hashes = NULL;
696 }
697 }
698
699 for ( i=0; i<lf->num_keys; i++ ) {
700 if ( !prs_hash_rec( "hash_rec", &hbin->ps, depth, &lf->hashes[i] ) )
701 return False;
702 }
703
704 end_off = prs_offset( &hbin->ps );
705
706 /* data_size must be divisible by 8 and large enough to hold the original record */
707
708 data_size = ((start_off - end_off) & 0xfffffff8 );
709 if ( data_size > lf->rec_size )
710 DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, lf->rec_size));
711
712 if ( MARSHALLING(&hbin->ps) )
713 hbin->dirty = True;
714
715 return True;
716 }
717
718 /*******************************************************************
719 *******************************************************************/
720
721 static bool hbin_prs_sk_rec( const char *desc, REGF_HBIN *hbin, int depth, REGF_SK_REC *sk )
722 {
723 prs_struct *ps = &hbin->ps;
724 uint16 tag = 0xFFFF;
725 uint32 data_size, start_off, end_off;
726
727
728 prs_debug(ps, depth, desc, "hbin_prs_sk_rec");
729 depth++;
730
731 if ( !prs_set_offset( &hbin->ps, sk->sk_off + HBIN_HDR_SIZE - hbin->first_hbin_off ) )
732 return False;
733
734 /* backup and get the data_size */
735
736 if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
737 return False;
738 start_off = prs_offset( &hbin->ps );
739 if ( !prs_uint32( "rec_size", &hbin->ps, depth, &sk->rec_size ))
740 return False;
741
742 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)sk->header, sizeof( sk->header )) )
743 return False;
744 if ( !prs_uint16( "tag", ps, depth, &tag))
745 return False;
746
747 if ( !prs_uint32( "prev_sk_off", ps, depth, &sk->prev_sk_off))
748 return False;
749 if ( !prs_uint32( "next_sk_off", ps, depth, &sk->next_sk_off))
750 return False;
751 if ( !prs_uint32( "ref_count", ps, depth, &sk->ref_count))
752 return False;
753 if ( !prs_uint32( "size", ps, depth, &sk->size))
754 return False;
755
756 {
757 NTSTATUS status;
758 TALLOC_CTX *mem_ctx = prs_get_mem_context(&hbin->ps);
759 DATA_BLOB blob;
760
761 if (MARSHALLING(&hbin->ps)) {
762 status = marshall_sec_desc(mem_ctx,
763 sk->sec_desc,
764 &blob.data, &blob.length);
765 if (!NT_STATUS_IS_OK(status))
766 return False;
767 if (!prs_copy_data_in(&hbin->ps, (const char *)blob.data, blob.length))
768 return False;
769 } else {
770 blob = data_blob_const(prs_data_p(&hbin->ps),
771 prs_data_size(&hbin->ps));
772 status = unmarshall_sec_desc(mem_ctx,
773 blob.data, blob.length,
774 &sk->sec_desc);
775 if (!NT_STATUS_IS_OK(status))
776 return False;
777 prs_set_offset(&hbin->ps, blob.length);
778 }
779 }
780
781 end_off = prs_offset( &hbin->ps );
782
783 /* data_size must be divisible by 8 and large enough to hold the original record */
784
785 data_size = ((start_off - end_off) & 0xfffffff8 );
786 if ( data_size > sk->rec_size )
787 DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, sk->rec_size));
788
789 if ( MARSHALLING(&hbin->ps) )
790 hbin->dirty = True;
791
792 return True;
793 }
794
795 /*******************************************************************
796 *******************************************************************/
797
798 static bool hbin_prs_vk_rec( const char *desc, REGF_HBIN *hbin, int depth, REGF_VK_REC *vk, REGF_FILE *file )
799 {
800 uint32 offset;
801 uint16 name_length;
802 prs_struct *ps = &hbin->ps;
803 uint32 data_size, start_off, end_off;
804
805 prs_debug(ps, depth, desc, "prs_vk_rec");
806 depth++;
807
808 /* backup and get the data_size */
809
810 if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
811 return False;
812 start_off = prs_offset( &hbin->ps );
813 if ( !prs_uint32( "rec_size", &hbin->ps, depth, &vk->rec_size ))
814 return False;
815
816 if ( !prs_uint8s( True, "header", ps, depth, (uint8*)vk->header, sizeof( vk->header )) )
817 return False;
818
819 if ( MARSHALLING(&hbin->ps) )
820 name_length = strlen(vk->valuename);
821
822 if ( !prs_uint16( "name_length", ps, depth, &name_length ))
823 return False;
824 if ( !prs_uint32( "data_size", ps, depth, &vk->data_size ))
825 return False;
826 if ( !prs_uint32( "data_off", ps, depth, &vk->data_off ))
827 return False;
828 if ( !prs_uint32( "type", ps, depth, &vk->type))
829 return False;
830 if ( !prs_uint16( "flag", ps, depth, &vk->flag))
831 return False;
832
833 offset = prs_offset( ps );
834 offset += 2; /* skip 2 bytes */
835 prs_set_offset( ps, offset );
836
837 /* get the name */
838
839 if ( vk->flag&VK_FLAG_NAME_PRESENT ) {
840
841 if ( UNMARSHALLING(&hbin->ps) ) {
842 if ( !(vk->valuename = PRS_ALLOC_MEM( ps, char, name_length+1 )))
843 return False;
844 }
845 if ( !prs_uint8s( True, "name", ps, depth, (uint8*)vk->valuename, name_length ) )
846 return False;
847 }
848
849 end_off = prs_offset( &hbin->ps );
850
851 /* get the data if necessary */
852
853 if ( vk->data_size != 0 ) {
854 bool charmode = False;
855
856 if ( (vk->type == REG_SZ) || (vk->type == REG_MULTI_SZ) )
857 charmode = True;
858
859 /* the data is stored in the offset if the size <= 4 */
860
861 if ( !(vk->data_size & VK_DATA_IN_OFFSET) ) {
862 REGF_HBIN *hblock = hbin;
863 uint32 data_rec_size;
864
865 if ( UNMARSHALLING(&hbin->ps) ) {
866 if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8, vk->data_size) ) )
867 return False;
868 }
869
870 /* this data can be in another hbin */
871 if ( !hbin_contains_offset( hbin, vk->data_off ) ) {
872 if ( !(hblock = lookup_hbin_block( file, vk->data_off )) )
873 return False;
874 }
875 if ( !(prs_set_offset( &hblock->ps, (vk->data_off+HBIN_HDR_SIZE-hblock->first_hbin_off)-sizeof(uint32) )) )
876 return False;
877
878 if ( MARSHALLING(&hblock->ps) ) {
879 data_rec_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
880 data_rec_size = ( data_rec_size - 1 ) ^ 0xFFFFFFFF;
881 }
882 if ( !prs_uint32( "data_rec_size", &hblock->ps, depth, &data_rec_size ))
883 return False;
884 if ( !prs_uint8s( charmode, "data", &hblock->ps, depth, vk->data, vk->data_size) )
885 return False;
886
887 if ( MARSHALLING(&hblock->ps) )
888 hblock->dirty = True;
889 }
890 else {
891 if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8, 4 ) ) )
892 return False;
893 SIVAL( vk->data, 0, vk->data_off );
894 }
895
896 }
897
898 /* data_size must be divisible by 8 and large enough to hold the original record */
899
900 data_size = ((start_off - end_off ) & 0xfffffff8 );
901 if ( data_size != vk->rec_size )
902 DEBUG(10,("prs_vk_rec: data_size check failed (0x%x < 0x%x)\n", data_size, vk->rec_size));
903
904 if ( MARSHALLING(&hbin->ps) )
905 hbin->dirty = True;
906
907 return True;
908 }
909
910 /*******************************************************************
911 read a VK record which is contained in the HBIN block stored
912 in the prs_struct *ps.
913 *******************************************************************/
914
915 static bool hbin_prs_vk_records( const char *desc, REGF_HBIN *hbin, int depth, REGF_NK_REC *nk, REGF_FILE *file )
916 {
917 int i;
918 uint32 record_size;
919
920 prs_debug(&hbin->ps, depth, desc, "prs_vk_records");
921 depth++;
922
923 /* check if we have anything to do first */
924
925 if ( nk->num_values == 0 )
926 return True;
927
928 if ( UNMARSHALLING(&hbin->ps) ) {
929 if ( !(nk->values = PRS_ALLOC_MEM( &hbin->ps, REGF_VK_REC, nk->num_values ) ) )
930 return False;
931 }
932
933 /* convert the offset to something relative to this HBIN block */
934
935 if ( !prs_set_offset( &hbin->ps, nk->values_off+HBIN_HDR_SIZE-hbin->first_hbin_off-sizeof(uint32)) )
936 return False;
937
938 if ( MARSHALLING( &hbin->ps) ) {
939 record_size = ( ( nk->num_values * sizeof(uint32) ) & 0xfffffff8 ) + 8;
940 record_size = (record_size - 1) ^ 0xFFFFFFFF;
941 }
942
943 if ( !prs_uint32( "record_size", &hbin->ps, depth, &record_size ) )
944 return False;
945
946 for ( i=0; i<nk->num_values; i++ ) {
947 if ( !prs_uint32( "vk_off", &hbin->ps, depth, &nk->values[i].rec_off ) )
948 return False;
949 }
950
951 for ( i=0; i<nk->num_values; i++ ) {
952 REGF_HBIN *sub_hbin = hbin;
953 uint32 new_offset;
954
955 if ( !hbin_contains_offset( hbin, nk->values[i].rec_off ) ) {
956 sub_hbin = lookup_hbin_block( file, nk->values[i].rec_off );
957 if ( !sub_hbin ) {
958 DEBUG(0,("hbin_prs_vk_records: Failed to find HBIN block containing offset [0x%x]\n",
959 nk->values[i].hbin_off));
960 return False;
961 }
962 }
963
964 new_offset = nk->values[i].rec_off + HBIN_HDR_SIZE - sub_hbin->first_hbin_off;
965 if ( !prs_set_offset( &sub_hbin->ps, new_offset ) )
966 return False;
967 if ( !hbin_prs_vk_rec( "vk_rec", sub_hbin, depth, &nk->values[i], file ) )
968 return False;
969 }
970
971 if ( MARSHALLING(&hbin->ps) )
972 hbin->dirty = True;
973
974
975 return True;
976 }
977
978
979 /*******************************************************************
980 *******************************************************************/
981
982 static REGF_SK_REC* find_sk_record_by_offset( REGF_FILE *file, uint32 offset )
983 {
984 REGF_SK_REC *p_sk;
985
986 for ( p_sk=file->sec_desc_list; p_sk; p_sk=p_sk->next ) {
987 if ( p_sk->sk_off == offset )
988 return p_sk;
989 }
990
991 return NULL;
992 }
993
994 /*******************************************************************
995 *******************************************************************/
996
997 static REGF_SK_REC* find_sk_record_by_sec_desc( REGF_FILE *file, struct security_descriptor *sd )
998 {
999 REGF_SK_REC *p;
1000
1001 for ( p=file->sec_desc_list; p; p=p->next ) {
1002 if ( security_descriptor_equal( p->sec_desc, sd ) )
1003 return p;
1004 }
1005
1006 /* failure */
1007
1008 return NULL;
1009 }
1010
1011 /*******************************************************************
1012 *******************************************************************/
1013
1014 static bool hbin_prs_key( REGF_FILE *file, REGF_HBIN *hbin, REGF_NK_REC *nk )
1015 {
1016 int depth = 0;
1017 REGF_HBIN *sub_hbin;
1018
1019 prs_debug(&hbin->ps, depth, "", "fetch_key");
1020 depth++;
1021
1022 /* get the initial nk record */
1023
1024 if ( !prs_nk_rec( "nk_rec", &hbin->ps, depth, nk ))
1025 return False;
1026
1027 /* fill in values */
1028
1029 if ( nk->num_values && (nk->values_off!=REGF_OFFSET_NONE) ) {
1030 sub_hbin = hbin;
1031 if ( !hbin_contains_offset( hbin, nk->values_off ) ) {
1032 sub_hbin = lookup_hbin_block( file, nk->values_off );
1033 if ( !sub_hbin ) {
1034 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing value_list_offset [0x%x]\n",
1035 nk->values_off));
1036 return False;
1037 }
1038 }
1039
1040 if ( !hbin_prs_vk_records( "vk_rec", sub_hbin, depth, nk, file ))
1041 return False;
1042 }
1043
1044 /* now get subkeys */
1045
1046 if ( nk->num_subkeys && (nk->subkeys_off!=REGF_OFFSET_NONE) ) {
1047 sub_hbin = hbin;
1048 if ( !hbin_contains_offset( hbin, nk->subkeys_off ) ) {
1049 sub_hbin = lookup_hbin_block( file, nk->subkeys_off );
1050 if ( !sub_hbin ) {
1051 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing subkey_offset [0x%x]\n",
1052 nk->subkeys_off));
1053 return False;
1054 }
1055 }
1056
1057 if ( !hbin_prs_lf_records( "lf_rec", sub_hbin, depth, nk ))
1058 return False;
1059 }
1060
1061 /* get the to the security descriptor. First look if we have already parsed it */
1062
1063 if ( (nk->sk_off!=REGF_OFFSET_NONE) && !( nk->sec_desc = find_sk_record_by_offset( file, nk->sk_off )) ) {
1064
1065 sub_hbin = hbin;
1066 if ( !hbin_contains_offset( hbin, nk->sk_off ) ) {
1067 sub_hbin = lookup_hbin_block( file, nk->sk_off );
1068 if ( !sub_hbin ) {
1069 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing sk_offset [0x%x]\n",
1070 nk->subkeys_off));
1071 return False;
1072 }
1073 }
1074
1075 if ( !(nk->sec_desc = TALLOC_ZERO_P( file->mem_ctx, REGF_SK_REC )) )
1076 return False;
1077 nk->sec_desc->sk_off = nk->sk_off;
1078 if ( !hbin_prs_sk_rec( "sk_rec", sub_hbin, depth, nk->sec_desc ))
1079 return False;
1080
1081 /* add to the list of security descriptors (ref_count has been read from the files) */
1082
1083 nk->sec_desc->sk_off = nk->sk_off;
1084 DLIST_ADD( file->sec_desc_list, nk->sec_desc );
1085 }
1086
1087 return True;
1088 }
1089
1090 /*******************************************************************
1091 *******************************************************************/
1092
1093 static bool next_record( REGF_HBIN *hbin, const char *hdr, bool *eob )
1094 {
1095 uint8 header[REC_HDR_SIZE];
1096 uint32 record_size;
1097 uint32 curr_off, block_size;
1098 bool found = False;
1099 prs_struct *ps = &hbin->ps;
1100
1101 curr_off = prs_offset( ps );
1102 if ( curr_off == 0 )
1103 prs_set_offset( ps, HBIN_HEADER_REC_SIZE );
1104
1105 /* assume that the current offset is at the record header
1106 and we need to backup to read the record size */
1107
1108 curr_off -= sizeof(uint32);
1109
1110 block_size = prs_data_size( ps );
1111 record_size = 0;
1112 memset( header, 0x0, sizeof(uint8)*REC_HDR_SIZE );
1113 while ( !found ) {
1114
1115 curr_off = curr_off+record_size;
1116 if ( curr_off >= block_size )
1117 break;
1118
1119 if ( !prs_set_offset( &hbin->ps, curr_off) )
1120 return False;
1121
1122 if ( !prs_uint32( "record_size", ps, 0, &record_size ) )
1123 return False;
1124 if ( !prs_uint8s( True, "header", ps, 0, header, REC_HDR_SIZE ) )
1125 return False;
1126
1127 if ( record_size & 0x80000000 ) {
1128 /* absolute_value(record_size) */
1129 record_size = (record_size ^ 0xffffffff) + 1;
1130 }
1131
1132 if ( memcmp( header, hdr, REC_HDR_SIZE ) == 0 ) {
1133 found = True;
1134 curr_off += sizeof(uint32);
1135 }
1136 }
1137
1138 /* mark prs_struct as done ( at end ) if no more SK records */
1139 /* mark end-of-block as True */
1140
1141 if ( !found ) {
1142 prs_set_offset( &hbin->ps, prs_data_size(&hbin->ps) );
1143 *eob = True;
1144 return False;
1145 }
1146
1147 if ( !prs_set_offset( ps, curr_off ) )
1148 return False;
1149
1150 return True;
1151 }
1152
1153 /*******************************************************************
1154 *******************************************************************/
1155
1156 static bool next_nk_record( REGF_FILE *file, REGF_HBIN *hbin, REGF_NK_REC *nk, bool *eob )
1157 {
1158 if ( next_record( hbin, "nk", eob ) && hbin_prs_key( file, hbin, nk ) )
1159 return True;
1160
1161 return False;
1162 }
1163
1164 /*******************************************************************
1165 Intialize the newly created REGF_BLOCK in *file and write the
1166 block header to disk
1167 *******************************************************************/
1168
1169 static bool init_regf_block( REGF_FILE *file )
1170 {
1171 prs_struct ps;
1172 bool result = True;
1173
1174 if ( !prs_init( &ps, REGF_BLOCKSIZE, file->mem_ctx, MARSHALL ) )
1175 return False;
1176
1177 memcpy( file->header, "regf", REGF_HDR_SIZE );
1178 file->data_offset = 0x20;
1179 file->last_block = 0x1000;
1180
1181 /* set mod time */
1182
1183 unix_to_nt_time( &file->mtime, time(NULL) );
1184
1185 /* hard coded values...no diea what these are ... maybe in time */
1186
1187 file->unknown1 = 0x2;
1188 file->unknown2 = 0x1;
1189 file->unknown3 = 0x3;
1190 file->unknown4 = 0x0;
1191 file->unknown5 = 0x1;
1192 file->unknown6 = 0x1;
1193
1194 /* write header to the buffer */
1195
1196 if ( !prs_regf_block( "regf_header", &ps, 0, file ) ) {
1197 result = False;
1198 goto out;
1199 }
1200
1201 /* calculate the checksum, re-marshall data (to include the checksum)
1202 and write to disk */
1203
1204 file->checksum = regf_block_checksum( &ps );
1205 prs_set_offset( &ps, 0 );
1206 if ( !prs_regf_block( "regf_header", &ps, 0, file ) ) {
1207 result = False;
1208 goto out;
1209 }
1210
1211 if ( write_block( file, &ps, 0 ) == -1 ) {
1212 DEBUG(0,("init_regf_block: Failed to initialize registry header block!\n"));
1213 result = False;
1214 goto out;
1215 }
1216
1217 out:
1218 prs_mem_free( &ps );
1219
1220 return result;
1221 }
1222 /*******************************************************************
1223 Open the registry file and then read in the REGF block to get the
1224 first hbin offset.
1225 *******************************************************************/
1226
1227 REGF_FILE* regfio_open( const char *filename, int flags, int mode )
1228 {
1229 REGF_FILE *rb;
1230
1231 if ( !(rb = SMB_MALLOC_P(REGF_FILE)) ) {
1232 DEBUG(0,("ERROR allocating memory\n"));
1233 return NULL;
1234 }
1235 ZERO_STRUCTP( rb );
1236 rb->fd = -1;
1237
1238 if ( !(rb->mem_ctx = talloc_init( "read_regf_block" )) ) {
1239 regfio_close( rb );
1240 return NULL;
1241 }
1242
1243 rb->open_flags = flags;
1244
1245 /* open and existing file */
1246
1247 if ( (rb->fd = open(filename, flags, mode)) == -1 ) {
1248 DEBUG(0,("regfio_open: failure to open %s (%s)\n", filename, strerror(errno)));
1249 regfio_close( rb );
1250 return NULL;
1251 }
1252
1253 /* check if we are creating a new file or overwriting an existing one */
1254
1255 if ( flags & (O_CREAT|O_TRUNC) ) {
1256 if ( !init_regf_block( rb ) ) {
1257 DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));
1258 regfio_close( rb );
1259 return NULL;
1260 }
1261
1262 /* success */
1263 return rb;
1264 }
1265
1266 /* read in an existing file */
1267
1268 if ( !read_regf_block( rb ) ) {
1269 DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));
1270 regfio_close( rb );
1271 return NULL;
1272 }
1273
1274 /* success */
1275
1276 return rb;
1277 }
1278
1279 /*******************************************************************
1280 *******************************************************************/
1281
1282 static void regfio_mem_free( REGF_FILE *file )
1283 {
1284 /* free any talloc()'d memory */
1285
1286 if ( file && file->mem_ctx )
1287 talloc_destroy( file->mem_ctx );
1288 }
1289
1290 /*******************************************************************
1291 *******************************************************************/
1292
1293 int regfio_close( REGF_FILE *file )
1294 {
1295 int fd;
1296
1297 /* cleanup for a file opened for write */
1298
1299 if ((file->fd != -1) && (file->open_flags & (O_WRONLY|O_RDWR))) {
1300 prs_struct ps;
1301 REGF_SK_REC *sk;
1302
1303 /* write of sd list */
1304
1305 for ( sk=file->sec_desc_list; sk; sk=sk->next ) {
1306 hbin_prs_sk_rec( "sk_rec", sk->hbin, 0, sk );
1307 }
1308
1309 /* flush any dirty blocks */
1310
1311 while ( file->block_list ) {
1312 hbin_block_close( file, file->block_list );
1313 }
1314
1315 ZERO_STRUCT( ps );
1316
1317 unix_to_nt_time( &file->mtime, time(NULL) );
1318
1319 if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) != -1 ) {
1320 /* now use for writing */
1321 prs_switch_type( &ps, MARSHALL );
1322
1323 /* stream the block once, generate the checksum,
1324 and stream it again */
1325 prs_set_offset( &ps, 0 );
1326 prs_regf_block( "regf_blocK", &ps, 0, file );
1327 file->checksum = regf_block_checksum( &ps );
1328 prs_set_offset( &ps, 0 );
1329 prs_regf_block( "regf_blocK", &ps, 0, file );
1330
1331 /* now we are ready to write it to disk */
1332 if ( write_block( file, &ps, 0 ) == -1 )
1333 DEBUG(0,("regfio_close: failed to update the regf header block!\n"));
1334 }
1335
1336 prs_mem_free( &ps );
1337 }
1338
1339 regfio_mem_free( file );
1340
1341 /* nothing tdo do if there is no open file */
1342
1343 if (file->fd == -1)
1344 return 0;
1345
1346 fd = file->fd;
1347 file->fd = -1;
1348 SAFE_FREE( file );
1349
1350 return close( fd );
1351 }
1352
1353 /*******************************************************************
1354 *******************************************************************/
1355
1356 static void regfio_flush( REGF_FILE *file )
1357 {
1358 REGF_HBIN *hbin;
1359
1360 for ( hbin=file->block_list; hbin; hbin=hbin->next ) {
1361 write_hbin_block( file, hbin );
1362 }
1363 }
1364
1365 /*******************************************************************
1366 There should be only *one* root key in the registry file based
1367 on my experience. --jerry
1368 *******************************************************************/
1369
1370 REGF_NK_REC* regfio_rootkey( REGF_FILE *file )
1371 {
1372 REGF_NK_REC *nk;
1373 REGF_HBIN *hbin;
1374 uint32 offset = REGF_BLOCKSIZE;
1375 bool found = False;
1376 bool eob;
1377
1378 if ( !file )
1379 return NULL;
1380
1381 if ( !(nk = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) ) {
1382 DEBUG(0,("regfio_rootkey: talloc() failed!\n"));
1383 return NULL;
1384 }
1385
1386 /* scan through the file on HBIN block at a time looking
1387 for an NK record with a type == 0x002c.
1388 Normally this is the first nk record in the first hbin
1389 block (but I'm not assuming that for now) */
1390
1391 while ( (hbin = read_hbin_block( file, offset )) ) {
1392 eob = False;
1393
1394 while ( !eob) {
1395 if ( next_nk_record( file, hbin, nk, &eob ) ) {
1396 if ( nk->key_type == NK_TYPE_ROOTKEY ) {
1397 found = True;
1398 break;
1399 }
1400 }
1401 prs_mem_free( &hbin->ps );
1402 }
1403
1404 if ( found )
1405 break;
1406
1407 offset += hbin->block_size;
1408 }
1409
1410 if ( !found ) {
1411 DEBUG(0,("regfio_rootkey: corrupt registry file ? No root key record located\n"));
1412 return NULL;
1413 }
1414
1415 DLIST_ADD( file->block_list, hbin );
1416
1417 return nk;
1418 }
1419
1420 /*******************************************************************
1421 This acts as an interator over the subkeys defined for a given
1422 NK record. Remember that offsets are from the *first* HBIN block.
1423 *******************************************************************/
1424
1425 REGF_NK_REC* regfio_fetch_subkey( REGF_FILE *file, REGF_NK_REC *nk )
1426 {
1427 REGF_NK_REC *subkey;
1428 REGF_HBIN *hbin;
1429 uint32 nk_offset;
1430
1431 /* see if there is anything left to report */
1432
1433 if ( !nk || (nk->subkeys_off==REGF_OFFSET_NONE) || (nk->subkey_index >= nk->num_subkeys) )
1434 return NULL;
1435
1436 /* find the HBIN block which should contain the nk record */
1437
1438 if ( !(hbin = lookup_hbin_block( file, nk->subkeys.hashes[nk->subkey_index].nk_off )) ) {
1439 DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing offset [0x%x]\n",
1440 nk->subkeys.hashes[nk->subkey_index].nk_off));
1441 return NULL;
1442 }
1443
1444 nk_offset = nk->subkeys.hashes[nk->subkey_index].nk_off;
1445 if ( !prs_set_offset( &hbin->ps, (HBIN_HDR_SIZE + nk_offset - hbin->first_hbin_off) ) )
1446 return NULL;
1447
1448 nk->subkey_index++;
1449 if ( !(subkey = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) )
1450 return NULL;
1451
1452 if ( !hbin_prs_key( file, hbin, subkey ) )
1453 return NULL;
1454
1455 return subkey;
1456 }
1457
1458
1459 /*******************************************************************
1460 *******************************************************************/
1461
1462 static REGF_HBIN* regf_hbin_allocate( REGF_FILE *file, uint32 block_size )
1463 {
1464 REGF_HBIN *hbin;
1465 SMB_STRUCT_STAT sbuf;
1466
1467 if ( !(hbin = TALLOC_ZERO_P( file->mem_ctx, REGF_HBIN )) )
1468 return NULL;
1469
1470 memcpy( hbin->header, "hbin", HBIN_HDR_SIZE);
1471
1472
1473 if (sys_fstat(file->fd, &sbuf, false)) {
1474 DEBUG(0,("regf_hbin_allocate: stat() failed! (%s)\n", strerror(errno)));
1475 return NULL;
1476 }
1477
1478 hbin->file_off = sbuf.st_ex_size;
1479
1480 hbin->free_off = HBIN_HEADER_REC_SIZE;
1481 hbin->free_size = block_size - hbin->free_off + sizeof(uint32);
1482
1483 hbin->block_size = block_size;
1484 hbin->first_hbin_off = hbin->file_off - REGF_BLOCKSIZE;
1485
1486 if ( !prs_init( &hbin->ps, block_size, file->mem_ctx, MARSHALL ) )
1487 return NULL;
1488
1489 if ( !prs_hbin_block( "new_hbin", &hbin->ps, 0, hbin ) )
1490 return NULL;
1491
1492 if ( !write_hbin_block( file, hbin ) )
1493 return NULL;
1494
1495 file->last_block = hbin->file_off;
1496
1497 return hbin;
1498 }
1499
1500 /*******************************************************************
1501 *******************************************************************/
1502
1503 static void update_free_space( REGF_HBIN *hbin, uint32 size_used )
1504 {
1505 hbin->free_off += size_used;
1506 hbin->free_size -= size_used;
1507
1508 if ( hbin->free_off >= hbin->block_size ) {
1509 hbin->free_off = REGF_OFFSET_NONE;
1510 }
1511
1512 return;
1513 }
1514
1515 /*******************************************************************
1516 *******************************************************************/
1517
1518 static REGF_HBIN* find_free_space( REGF_FILE *file, uint32 size )
1519 {
1520 REGF_HBIN *hbin, *p_hbin;
1521 uint32 block_off;
1522 bool cached;
1523
1524 /* check open block list */
1525
1526 for ( hbin=file->block_list; hbin!=NULL; hbin=hbin->next ) {
1527 /* only check blocks that actually have available space */
1528
1529 if ( hbin->free_off == REGF_OFFSET_NONE )
1530 continue;
1531
1532 /* check for a large enough available chunk */
1533
1534 if ( (hbin->block_size - hbin->free_off) >= size ) {
1535 DLIST_PROMOTE( file->block_list, hbin );
1536 goto done;
1537 }
1538 }
1539
1540 /* parse the file until we find a block with
1541 enough free space; save the last non-filled hbin */
1542
1543 block_off = REGF_BLOCKSIZE;
1544 do {
1545 /* cleanup before the next round */
1546 cached = False;
1547 if ( hbin )
1548 prs_mem_free( &hbin->ps );
1549
1550 hbin = read_hbin_block( file, block_off );
1551
1552 if ( hbin ) {
1553
1554 /* make sure that we don't already have this block in memory */
1555
1556 for ( p_hbin=file->block_list; p_hbin!=NULL; p_hbin=p_hbin->next ) {
1557 if ( p_hbin->file_off == hbin->file_off ) {
1558 cached = True;
1559 break;
1560 }
1561 }
1562
1563 block_off = hbin->file_off + hbin->block_size;
1564
1565 if ( cached ) {
1566 prs_mem_free( &hbin->ps );
1567 hbin = NULL;
1568 continue;
1569 }
1570 }
1571 /* if (cached block or (new block and not enough free space)) then continue looping */
1572 } while ( cached || (hbin && (hbin->free_size < size)) );
1573
1574 /* no free space; allocate a new one */
1575
1576 if ( !hbin ) {
1577 uint32 alloc_size;
1578
1579 /* allocate in multiples of REGF_ALLOC_BLOCK; make sure (size + hbin_header) fits */
1580
1581 alloc_size = (((size+HBIN_HEADER_REC_SIZE) / REGF_ALLOC_BLOCK ) + 1 ) * REGF_ALLOC_BLOCK;
1582
1583 if ( !(hbin = regf_hbin_allocate( file, alloc_size )) ) {
1584 DEBUG(0,("find_free_space: regf_hbin_allocate() failed!\n"));
1585 return NULL;
1586 }
1587 DLIST_ADD( file->block_list, hbin );
1588 }
1589
1590 done:
1591 /* set the offset to be ready to write */
1592
1593 if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32) ) )
1594 return NULL;
1595
1596 /* write the record size as a placeholder for now, it should be
1597 probably updated by the caller once it all of the data necessary
1598 for the record */
1599
1600 if ( !prs_uint32("allocated_size", &hbin->ps, 0, &size) )
1601 return False;
1602
1603 update_free_space( hbin, size );
1604
1605 return hbin;
1606 }
1607
1608 /*******************************************************************
1609 *******************************************************************/
1610
1611 static uint32 sk_record_data_size( struct security_descriptor * sd )
1612 {
1613 uint32 size, size_mod8;
1614
1615 size_mod8 = 0;
1616
1617 /* the record size is sizeof(hdr) + name + static members + data_size_field */
1618
1619 size = sizeof(uint32)*5 + ndr_size_security_descriptor(sd, 0) + sizeof(uint32);
1620
1621 /* multiple of 8 */
1622 size_mod8 = size & 0xfffffff8;
1623 if ( size_mod8 < size )
1624 size_mod8 += 8;
1625
1626 return size_mod8;
1627 }
1628
1629 /*******************************************************************
1630 *******************************************************************/
1631
1632 static uint32 vk_record_data_size( REGF_VK_REC *vk )
1633 {
1634 uint32 size, size_mod8;
1635
1636 size_mod8 = 0;
1637
1638 /* the record size is sizeof(hdr) + name + static members + data_size_field */
1639
1640 size = REC_HDR_SIZE + (sizeof(uint16)*3) + (sizeof(uint32)*3) + sizeof(uint32);
1641
1642 if ( vk->valuename )
1643 size += strlen(vk->valuename);
1644
1645 /* multiple of 8 */
1646 size_mod8 = size & 0xfffffff8;
1647 if ( size_mod8 < size )
1648 size_mod8 += 8;
1649
1650 return size_mod8;
1651 }
1652
1653 /*******************************************************************
1654 *******************************************************************/
1655
1656 static uint32 lf_record_data_size( uint32 num_keys )
1657 {
1658 uint32 size, size_mod8;
1659
1660 size_mod8 = 0;
1661
1662 /* the record size is sizeof(hdr) + num_keys + sizeof of hash_array + data_size_uint32 */
1663
1664 size = REC_HDR_SIZE + sizeof(uint16) + (sizeof(REGF_HASH_REC) * num_keys) + sizeof(uint32);
1665
1666 /* multiple of 8 */
1667 size_mod8 = size & 0xfffffff8;
1668 if ( size_mod8 < size )
1669 size_mod8 += 8;
1670
1671 return size_mod8;
1672 }
1673
1674 /*******************************************************************
1675 *******************************************************************/
1676
1677 static uint32 nk_record_data_size( REGF_NK_REC *nk )
1678 {
1679 uint32 size, size_mod8;
1680
1681 size_mod8 = 0;
1682
1683 /* the record size is static + length_of_keyname + length_of_classname + data_size_uint32 */
1684
1685 size = 0x4c + strlen(nk->keyname) + sizeof(uint32);
1686
1687 if ( nk->classname )
1688 size += strlen( nk->classname );
1689
1690 /* multiple of 8 */
1691 size_mod8 = size & 0xfffffff8;
1692 if ( size_mod8 < size )
1693 size_mod8 += 8;
1694
1695 return size_mod8;
1696 }
1697
1698 /*******************************************************************
1699 *******************************************************************/
1700
1701 static bool create_vk_record(REGF_FILE *file, REGF_VK_REC *vk,
1702 struct regval_blob *value)
1703 {
1704 char *name = regval_name(value);
1705 REGF_HBIN *data_hbin;
1706
1707 ZERO_STRUCTP( vk );
1708
1709 memcpy( vk->header, "vk", REC_HDR_SIZE );
1710
1711 if ( name ) {
1712 vk->valuename = talloc_strdup( file->mem_ctx, regval_name(value) );
1713 vk->flag = VK_FLAG_NAME_PRESENT;
1714 }
1715
1716 vk->data_size = regval_size( value );
1717 vk->type = regval_type( value );
1718
1719 if ( vk->data_size > sizeof(uint32) ) {
1720 uint32 data_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
1721
1722 vk->data = (uint8 *)TALLOC_MEMDUP( file->mem_ctx,
1723 regval_data_p(value),
1724 vk->data_size );
1725 if (vk->data == NULL) {
1726 return False;
1727 }
1728
1729 /* go ahead and store the offset....we'll pick this hbin block back up when
1730 we stream the data */
1731
1732 if ((data_hbin = find_free_space(file, data_size )) == NULL) {
1733 return False;
1734 }
1735 vk->data_off = prs_offset( &data_hbin->ps ) + data_hbin->first_hbin_off - HBIN_HDR_SIZE;
1736 }
1737 else {
1738 /* make sure we don't try to copy from a NULL value pointer */
1739
1740 if ( vk->data_size != 0 )
1741 memcpy( &vk->data_off, regval_data_p(value), sizeof(uint32) );
1742 vk->data_size |= VK_DATA_IN_OFFSET;
1743 }
1744
1745 return True;
1746 }
1747
1748 /*******************************************************************
1749 *******************************************************************/
1750
1751 static int hashrec_cmp( REGF_HASH_REC *h1, REGF_HASH_REC *h2 )
1752 {
1753 return StrCaseCmp( h1->fullname, h2->fullname );
1754 }
1755
1756 /*******************************************************************
1757 *******************************************************************/
1758
1759 REGF_NK_REC* regfio_write_key( REGF_FILE *file, const char *name,
1760 struct regval_ctr *values, struct regsubkey_ctr *subkeys,
1761 struct security_descriptor *sec_desc, REGF_NK_REC *parent )
1762 {
1763 REGF_NK_REC *nk;
1764 REGF_HBIN *vlist_hbin = NULL;
1765 uint32 size;
1766
1767 if ( !(nk = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) )
1768 return NULL;
1769
1770 memcpy( nk->header, "nk", REC_HDR_SIZE );
1771
1772 if ( !parent )
1773 nk->key_type = NK_TYPE_ROOTKEY;
1774 else
1775 nk->key_type = NK_TYPE_NORMALKEY;
1776
1777 /* store the parent offset (or -1 if a the root key */
1778
1779 nk->parent_off = parent ? (parent->hbin_off + parent->hbin->file_off - REGF_BLOCKSIZE - HBIN_HDR_SIZE ) : REGF_OFFSET_NONE;
1780
1781 /* no classname currently */
1782
1783 nk->classname_off = REGF_OFFSET_NONE;
1784 nk->classname = NULL;
1785 nk->keyname = talloc_strdup( file->mem_ctx, name );
1786
1787 /* current modification time */
1788
1789 unix_to_nt_time( &nk->mtime, time(NULL) );
1790
1791 /* allocate the record on disk */
1792
1793 size = nk_record_data_size( nk );
1794 nk->rec_size = ( size - 1 ) ^ 0XFFFFFFFF;
1795 if ((nk->hbin = find_free_space( file, size )) == NULL) {
1796 return NULL;
1797 }
1798 nk->hbin_off = prs_offset( &nk->hbin->ps );
1799
1800 /* Update the hash record in the parent */
1801
1802 if ( parent ) {
1803 REGF_HASH_REC *hash = &parent->subkeys.hashes[parent->subkey_index];
1804
1805 hash->nk_off = prs_offset( &nk->hbin->ps ) + nk->hbin->first_hbin_off - HBIN_HDR_SIZE;
1806 memcpy( hash->keycheck, name, sizeof(uint32) );
1807 hash->fullname = talloc_strdup( file->mem_ctx, name );
1808 parent->subkey_index++;
1809
1810 /* sort the list by keyname */
1811 TYPESAFE_QSORT(parent->subkeys.hashes, parent->subkey_index, hashrec_cmp);
1812
1813 if ( !hbin_prs_lf_records( "lf_rec", parent->subkeys.hbin, 0, parent ) )
1814 return False;
1815 }
1816
1817 /* write the security descriptor */
1818
1819 nk->sk_off = REGF_OFFSET_NONE;
1820 if ( sec_desc ) {
1821 uint32 sk_size = sk_record_data_size( sec_desc );
1822 REGF_HBIN *sk_hbin;
1823
1824 /* search for it in the existing list of sd's */
1825
1826 if ( (nk->sec_desc = find_sk_record_by_sec_desc( file, sec_desc )) == NULL ) {
1827 /* not found so add it to the list */
1828
1829 if (!(sk_hbin = find_free_space( file, sk_size ))) {
1830 return NULL;
1831 }
1832
1833 if ( !(nk->sec_desc = TALLOC_ZERO_P( file->mem_ctx, REGF_SK_REC )) )
1834 return NULL;
1835
1836 /* now we have to store the security descriptor in the list and
1837 update the offsets */
1838
1839 memcpy( nk->sec_desc->header, "sk", REC_HDR_SIZE );
1840 nk->sec_desc->hbin = sk_hbin;
1841 nk->sec_desc->hbin_off = prs_offset( &sk_hbin->ps );
1842 nk->sec_desc->sk_off = prs_offset( &sk_hbin->ps ) + sk_hbin->first_hbin_off - HBIN_HDR_SIZE;
1843 nk->sec_desc->rec_size = (sk_size-1) ^ 0xFFFFFFFF;
1844
1845 nk->sec_desc->sec_desc = sec_desc;
1846 nk->sec_desc->ref_count = 0;
1847
1848 /* size value must be self-inclusive */
1849 nk->sec_desc->size = ndr_size_security_descriptor(sec_desc, 0)
1850 + sizeof(uint32);
1851
1852 DLIST_ADD_END( file->sec_desc_list, nk->sec_desc, REGF_SK_REC *);
1853
1854 /* update the offsets for us and the previous sd in the list.
1855 if this is the first record, then just set the next and prev
1856 offsets to ourself. */
1857
1858 if ( DLIST_PREV(nk->sec_desc) ) {
1859 REGF_SK_REC *prev = DLIST_PREV(nk->sec_desc);
1860
1861 nk->sec_desc->prev_sk_off = prev->hbin_off + prev->hbin->first_hbin_off - HBIN_HDR_SIZE;
1862 prev->next_sk_off = nk->sec_desc->sk_off;
1863
1864 /* the end must loop around to the front */
1865 nk->sec_desc->next_sk_off = file->sec_desc_list->sk_off;
1866
1867 /* and first must loop around to the tail */
1868 file->sec_desc_list->prev_sk_off = nk->sec_desc->sk_off;
1869 } else {
1870 nk->sec_desc->prev_sk_off = nk->sec_desc->sk_off;
1871 nk->sec_desc->next_sk_off = nk->sec_desc->sk_off;
1872 }
1873 }
1874
1875 /* bump the reference count +1 */
1876
1877 nk->sk_off = nk->sec_desc->sk_off;
1878 nk->sec_desc->ref_count++;
1879 }
1880
1881 /* write the subkeys */
1882
1883 nk->subkeys_off = REGF_OFFSET_NONE;
1884 if ( (nk->num_subkeys = regsubkey_ctr_numkeys( subkeys )) != 0 ) {
1885 uint32 lf_size = lf_record_data_size( nk->num_subkeys );
1886 uint32 namelen;
1887 int i;
1888
1889 if (!(nk->subkeys.hbin = find_free_space( file, lf_size ))) {
1890 return NULL;
1891 }
1892 nk->subkeys.hbin_off = prs_offset( &nk->subkeys.hbin->ps );
1893 nk->subkeys.rec_size = (lf_size-1) ^ 0xFFFFFFFF;
1894 nk->subkeys_off = prs_offset( &nk->subkeys.hbin->ps ) + nk->subkeys.hbin->first_hbin_off - HBIN_HDR_SIZE;
1895
1896 memcpy( nk->subkeys.header, "lf", REC_HDR_SIZE );
1897
1898 nk->subkeys.num_keys = nk->num_subkeys;
1899 if (nk->subkeys.num_keys) {
1900 if ( !(nk->subkeys.hashes = TALLOC_ZERO_ARRAY( file->mem_ctx, REGF_HASH_REC, nk->subkeys.num_keys )) )
1901 return NULL;
1902 } else {
1903 nk->subkeys.hashes = NULL;
1904 }
1905 nk->subkey_index = 0;
1906
1907 /* update the max_bytes_subkey{name,classname} fields */
1908 for ( i=0; i<nk->num_subkeys; i++ ) {
1909 namelen = strlen( regsubkey_ctr_specific_key(subkeys, i) );
1910 if ( namelen*2 > nk->max_bytes_subkeyname )
1911 nk->max_bytes_subkeyname = namelen * 2;
1912 }
1913 }
1914
1915 /* write the values */
1916
1917 nk->values_off = REGF_OFFSET_NONE;
1918 if ( (nk->num_values = regval_ctr_numvals( values )) != 0 ) {
1919 uint32 vlist_size = ( ( nk->num_values * sizeof(uint32) ) & 0xfffffff8 ) + 8;
1920 int i;
1921
1922 if (!(vlist_hbin = find_free_space( file, vlist_size ))) {
1923 return NULL;
1924 }
1925 nk->values_off = prs_offset( &vlist_hbin->ps ) + vlist_hbin->first_hbin_off - HBIN_HDR_SIZE;
1926
1927 if (nk->num_values) {
1928 if ( !(nk->values = TALLOC_ARRAY( file->mem_ctx, REGF_VK_REC, nk->num_values )) )
1929 return NULL;
1930 } else {
1931 nk->values = NULL;
1932 }
1933
1934 /* create the vk records */
1935
1936 for ( i=0; i<nk->num_values; i++ ) {
1937 uint32 vk_size, namelen, datalen;
1938 struct regval_blob *r;
1939
1940 r = regval_ctr_specific_value( values, i );
1941 create_vk_record( file, &nk->values[i], r );
1942 vk_size = vk_record_data_size( &nk->values[i] );
1943 nk->values[i].hbin = find_free_space( file, vk_size );
1944 nk->values[i].hbin_off = prs_offset( &nk->values[i].hbin->ps );
1945 nk->values[i].rec_size = ( vk_size - 1 ) ^ 0xFFFFFFFF;
1946 nk->values[i].rec_off = prs_offset( &nk->values[i].hbin->ps )
1947 + nk->values[i].hbin->first_hbin_off
1948 - HBIN_HDR_SIZE;
1949
1950 /* update the max bytes fields if necessary */
1951
1952 namelen = strlen( regval_name(r) );
1953 if ( namelen*2 > nk->max_bytes_valuename )
1954 nk->max_bytes_valuename = namelen * 2;
1955
1956 datalen = regval_size( r );
1957 if ( datalen > nk->max_bytes_value )
1958 nk->max_bytes_value = datalen;
1959 }
1960 }
1961
1962 /* stream the records */
1963
1964 prs_set_offset( &nk->hbin->ps, nk->hbin_off );
1965 if ( !prs_nk_rec( "nk_rec", &nk->hbin->ps, 0, nk ) )
1966 return False;
1967
1968 if ( nk->num_values ) {
1969 if ( !hbin_prs_vk_records( "vk_records", vlist_hbin, 0, nk, file ) )
1970 return False;
1971 }
1972
1973
1974 regfio_flush( file );
1975
1976 return nk;
1977 }
1978
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