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Viewing changes to source3/registry/regfio.c

  • Committer: Chuck Short
  • Date: 2010-09-28 20:38:39 UTC
  • Revision ID: zulcss@ubuntu.com-20100928203839-pgjulytsi9ue63x1
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source3/registry/regfio.c
 
1
/*
 
2
 * Unix SMB/CIFS implementation.
 
3
 * Windows NT registry I/O library
 
4
 * Copyright (c) Gerald (Jerry) Carter               2005
 
5
 *
 
6
 * This program is free software; you can redistribute it and/or modify
 
7
 * it under the terms of the GNU General Public License as published by
 
8
 * the Free Software Foundation; either version 3 of the License, or
 
9
 * (at your option) any later version.
 
10
 *
 
11
 * This program is distributed in the hope that it will be useful,
 
12
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
13
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
14
 * GNU General Public License for more details.
 
15
 *
 
16
 * You should have received a copy of the GNU General Public License
 
17
 * along with this program; if not, see <http://www.gnu.org/licenses/>.  
 
18
 */
 
19
 
 
20
#include "includes.h"
 
21
#include "regfio.h"
 
22
 
 
23
#undef DBGC_CLASS
 
24
#define DBGC_CLASS DBGC_REGISTRY
 
25
 
 
26
/*******************************************************************
 
27
 *
 
28
 * TODO : Right now this code basically ignores classnames.
 
29
 *
 
30
 ******************************************************************/
 
31
 
 
32
 
 
33
/*******************************************************************
 
34
*******************************************************************/
 
35
 
 
36
static int write_block( REGF_FILE *file, prs_struct *ps, uint32 offset )
 
37
{
 
38
        int bytes_written, returned;
 
39
        char *buffer = prs_data_p( ps );
 
40
        uint32 buffer_size = prs_data_size( ps );
 
41
        SMB_STRUCT_STAT sbuf;
 
42
 
 
43
        if ( file->fd == -1 )
 
44
                return -1;
 
45
 
 
46
        /* check for end of file */
 
47
 
 
48
        if ( sys_fstat( file->fd, &sbuf ) ) {
 
49
                DEBUG(0,("write_block: stat() failed! (%s)\n", strerror(errno)));
 
50
                return -1;
 
51
        }
 
52
 
 
53
        if ( lseek( file->fd, offset, SEEK_SET ) == -1 ) {
 
54
                DEBUG(0,("write_block: lseek() failed! (%s)\n", strerror(errno) ));
 
55
                return -1;
 
56
        }
 
57
        
 
58
        bytes_written = returned = 0;
 
59
        while ( bytes_written < buffer_size ) {
 
60
                if ( (returned = write( file->fd, buffer+bytes_written, buffer_size-bytes_written )) == -1 ) {
 
61
                        DEBUG(0,("write_block: write() failed! (%s)\n", strerror(errno) ));
 
62
                        return False;
 
63
                }
 
64
                                
 
65
                bytes_written += returned;
 
66
        }
 
67
        
 
68
        return bytes_written;
 
69
}
 
70
 
 
71
/*******************************************************************
 
72
*******************************************************************/
 
73
 
 
74
static int read_block( REGF_FILE *file, prs_struct *ps, uint32 file_offset, uint32 block_size )
 
75
{
 
76
        int bytes_read, returned;
 
77
        char *buffer;
 
78
        SMB_STRUCT_STAT sbuf;
 
79
 
 
80
        /* check for end of file */
 
81
 
 
82
        if ( sys_fstat( file->fd, &sbuf ) ) {
 
83
                DEBUG(0,("read_block: stat() failed! (%s)\n", strerror(errno)));
 
84
                return -1;
 
85
        }
 
86
 
 
87
        if ( (size_t)file_offset >= sbuf.st_size )
 
88
                return -1;
 
89
        
 
90
        /* if block_size == 0, we are parsing HBIN records and need 
 
91
           to read some of the header to get the block_size from there */
 
92
           
 
93
        if ( block_size == 0 ) {
 
94
                char hdr[0x20];
 
95
 
 
96
                if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
 
97
                        DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));
 
98
                        return -1;
 
99
                }
 
100
 
 
101
                returned = read( file->fd, hdr, 0x20 );
 
102
                if ( (returned == -1) || (returned < 0x20) ) {
 
103
                        DEBUG(0,("read_block: failed to read in HBIN header. Is the file corrupt?\n"));
 
104
                        return -1;
 
105
                }
 
106
 
 
107
                /* make sure this is an hbin header */
 
108
 
 
109
                if ( strncmp( hdr, "hbin", HBIN_HDR_SIZE ) != 0 ) {
 
110
                        DEBUG(0,("read_block: invalid block header!\n"));
 
111
                        return -1;
 
112
                }
 
113
 
 
114
                block_size = IVAL( hdr, 0x08 );
 
115
        }
 
116
 
 
117
        DEBUG(10,("read_block: block_size == 0x%x\n", block_size ));
 
118
 
 
119
        /* set the offset, initialize the buffer, and read the block from disk */
 
120
 
 
121
        if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
 
122
                DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));
 
123
                return -1;
 
124
        }
 
125
        
 
126
        if (!prs_init( ps, block_size, file->mem_ctx, UNMARSHALL )) {
 
127
                DEBUG(0,("read_block: prs_init() failed! (%s)\n", strerror(errno) ));
 
128
                return -1;
 
129
        }
 
130
        buffer = prs_data_p( ps );
 
131
        bytes_read = returned = 0;
 
132
 
 
133
        while ( bytes_read < block_size ) {
 
134
                if ( (returned = read( file->fd, buffer+bytes_read, block_size-bytes_read )) == -1 ) {
 
135
                        DEBUG(0,("read_block: read() failed (%s)\n", strerror(errno) ));
 
136
                        return False;
 
137
                }
 
138
                if ( (returned == 0) && (bytes_read < block_size) ) {
 
139
                        DEBUG(0,("read_block: not a vald registry file ?\n" ));
 
140
                        return False;
 
141
                }       
 
142
                
 
143
                bytes_read += returned;
 
144
        }
 
145
        
 
146
        return bytes_read;
 
147
}
 
148
 
 
149
/*******************************************************************
 
150
*******************************************************************/
 
151
 
 
152
static bool write_hbin_block( REGF_FILE *file, REGF_HBIN *hbin )
 
153
{
 
154
        if ( !hbin->dirty )
 
155
                return True;
 
156
 
 
157
        /* write free space record if any is available */
 
158
 
 
159
        if ( hbin->free_off != REGF_OFFSET_NONE ) {
 
160
                uint32 header = 0xffffffff;
 
161
 
 
162
                if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32) ) )
 
163
                        return False;
 
164
                if ( !prs_uint32( "free_size", &hbin->ps, 0, &hbin->free_size ) )
 
165
                        return False;
 
166
                if ( !prs_uint32( "free_header", &hbin->ps, 0, &header ) )
 
167
                        return False;
 
168
        }
 
169
 
 
170
        hbin->dirty = (write_block( file, &hbin->ps, hbin->file_off ) != -1);
 
171
 
 
172
        return hbin->dirty;
 
173
}
 
174
 
 
175
/*******************************************************************
 
176
*******************************************************************/
 
177
 
 
178
static bool hbin_block_close( REGF_FILE *file, REGF_HBIN *hbin )
 
179
{
 
180
        REGF_HBIN *p;
 
181
 
 
182
        /* remove the block from the open list and flush it to disk */
 
183
 
 
184
        for ( p=file->block_list; p && p!=hbin; p=p->next )
 
185
                ;;
 
186
 
 
187
        if ( p == hbin ) {
 
188
                DLIST_REMOVE( file->block_list, hbin );
 
189
        }
 
190
        else
 
191
                DEBUG(0,("hbin_block_close: block not in open list!\n"));
 
192
 
 
193
        if ( !write_hbin_block( file, hbin ) )
 
194
                return False;
 
195
 
 
196
        return True;
 
197
}
 
198
 
 
199
/*******************************************************************
 
200
*******************************************************************/
 
201
 
 
202
static bool prs_regf_block( const char *desc, prs_struct *ps, int depth, REGF_FILE *file )
 
203
{
 
204
        prs_debug(ps, depth, desc, "prs_regf_block");
 
205
        depth++;
 
206
        
 
207
        if ( !prs_uint8s( True, "header", ps, depth, (uint8*)file->header, sizeof( file->header )) )
 
208
                return False;
 
209
        
 
210
        /* yes, these values are always identical so store them only once */
 
211
        
 
212
        if ( !prs_uint32( "unknown1", ps, depth, &file->unknown1 ))
 
213
                return False;
 
214
        if ( !prs_uint32( "unknown1 (again)", ps, depth, &file->unknown1 ))
 
215
                return False;
 
216
 
 
217
        /* get the modtime */
 
218
        
 
219
        if ( !prs_set_offset( ps, 0x0c ) )
 
220
                return False;
 
221
        if ( !smb_io_time( "modtime", &file->mtime, ps, depth ) )
 
222
                return False;
 
223
 
 
224
        /* constants */
 
225
        
 
226
        if ( !prs_uint32( "unknown2", ps, depth, &file->unknown2 ))
 
227
                return False;
 
228
        if ( !prs_uint32( "unknown3", ps, depth, &file->unknown3 ))
 
229
                return False;
 
230
        if ( !prs_uint32( "unknown4", ps, depth, &file->unknown4 ))
 
231
                return False;
 
232
        if ( !prs_uint32( "unknown5", ps, depth, &file->unknown5 ))
 
233
                return False;
 
234
 
 
235
        /* get file offsets */
 
236
        
 
237
        if ( !prs_set_offset( ps, 0x24 ) )
 
238
                return False;
 
239
        if ( !prs_uint32( "data_offset", ps, depth, &file->data_offset ))
 
240
                return False;
 
241
        if ( !prs_uint32( "last_block", ps, depth, &file->last_block ))
 
242
                return False;
 
243
                
 
244
        /* one more constant */
 
245
        
 
246
        if ( !prs_uint32( "unknown6", ps, depth, &file->unknown6 ))
 
247
                return False;
 
248
                
 
249
        /* get the checksum */
 
250
        
 
251
        if ( !prs_set_offset( ps, 0x01fc ) )
 
252
                return False;
 
253
        if ( !prs_uint32( "checksum", ps, depth, &file->checksum ))
 
254
                return False;
 
255
        
 
256
        return True;
 
257
}
 
258
 
 
259
/*******************************************************************
 
260
*******************************************************************/
 
261
 
 
262
static bool prs_hbin_block( const char *desc, prs_struct *ps, int depth, REGF_HBIN *hbin )
 
263
{
 
264
        uint32 block_size2;
 
265
 
 
266
        prs_debug(ps, depth, desc, "prs_regf_block");
 
267
        depth++;
 
268
        
 
269
        if ( !prs_uint8s( True, "header", ps, depth, (uint8*)hbin->header, sizeof( hbin->header )) )
 
270
                return False;
 
271
 
 
272
        if ( !prs_uint32( "first_hbin_off", ps, depth, &hbin->first_hbin_off ))
 
273
                return False;
 
274
 
 
275
        /* The dosreg.cpp comments say that the block size is at 0x1c.
 
276
           According to a WINXP NTUSER.dat file, this is wrong.  The block_size
 
277
           is at 0x08 */
 
278
 
 
279
        if ( !prs_uint32( "block_size", ps, depth, &hbin->block_size ))
 
280
                return False;
 
281
 
 
282
        block_size2 = hbin->block_size;
 
283
        prs_set_offset( ps, 0x1c );
 
284
        if ( !prs_uint32( "block_size2", ps, depth, &block_size2 ))
 
285
                return False;
 
286
 
 
287
        if ( MARSHALLING(ps) )
 
288
                hbin->dirty = True;
 
289
        
 
290
 
 
291
        return True;
 
292
}
 
293
 
 
294
/*******************************************************************
 
295
*******************************************************************/
 
296
 
 
297
static bool prs_nk_rec( const char *desc, prs_struct *ps, int depth, REGF_NK_REC *nk )
 
298
{
 
299
        uint16 class_length, name_length;
 
300
        uint32 start;
 
301
        uint32 data_size, start_off, end_off;
 
302
        uint32 unknown_off = REGF_OFFSET_NONE;
 
303
 
 
304
        nk->hbin_off = prs_offset( ps );
 
305
        start = nk->hbin_off;
 
306
        
 
307
        prs_debug(ps, depth, desc, "prs_nk_rec");
 
308
        depth++;
 
309
        
 
310
        /* back up and get the data_size */
 
311
        
 
312
        if ( !prs_set_offset( ps, prs_offset(ps)-sizeof(uint32)) )
 
313
                return False;
 
314
        start_off = prs_offset( ps );
 
315
        if ( !prs_uint32( "rec_size", ps, depth, &nk->rec_size ))
 
316
                return False;
 
317
        
 
318
        if ( !prs_uint8s( True, "header", ps, depth, (uint8*)nk->header, sizeof( nk->header )) )
 
319
                return False;
 
320
                
 
321
        if ( !prs_uint16( "key_type", ps, depth, &nk->key_type ))
 
322
                return False;
 
323
        if ( !smb_io_time( "mtime", &nk->mtime, ps, depth ))
 
324
                return False;
 
325
                
 
326
        if ( !prs_set_offset( ps, start+0x0010 ) )
 
327
                return False;
 
328
        if ( !prs_uint32( "parent_off", ps, depth, &nk->parent_off ))
 
329
                return False;
 
330
        if ( !prs_uint32( "num_subkeys", ps, depth, &nk->num_subkeys ))
 
331
                return False;
 
332
                
 
333
        if ( !prs_set_offset( ps, start+0x001c ) )
 
334
                return False;
 
335
        if ( !prs_uint32( "subkeys_off", ps, depth, &nk->subkeys_off ))
 
336
                return False;
 
337
        if ( !prs_uint32( "unknown_off", ps, depth, &unknown_off) )
 
338
                return False;
 
339
                
 
340
        if ( !prs_set_offset( ps, start+0x0024 ) )
 
341
                return False;
 
342
        if ( !prs_uint32( "num_values", ps, depth, &nk->num_values ))
 
343
                return False;
 
344
        if ( !prs_uint32( "values_off", ps, depth, &nk->values_off ))
 
345
                return False;
 
346
        if ( !prs_uint32( "sk_off", ps, depth, &nk->sk_off ))
 
347
                return False;
 
348
        if ( !prs_uint32( "classname_off", ps, depth, &nk->classname_off ))
 
349
                return False;
 
350
 
 
351
        if ( !prs_uint32( "max_bytes_subkeyname", ps, depth, &nk->max_bytes_subkeyname))
 
352
                return False;
 
353
        if ( !prs_uint32( "max_bytes_subkeyclassname", ps, depth, &nk->max_bytes_subkeyclassname))
 
354
                return False;
 
355
        if ( !prs_uint32( "max_bytes_valuename", ps, depth, &nk->max_bytes_valuename))
 
356
                return False;
 
357
        if ( !prs_uint32( "max_bytes_value", ps, depth, &nk->max_bytes_value))
 
358
                return False;
 
359
        if ( !prs_uint32( "unknown index", ps, depth, &nk->unk_index))
 
360
                return False;
 
361
 
 
362
        name_length = nk->keyname ? strlen(nk->keyname) : 0 ;
 
363
        class_length = nk->classname ? strlen(nk->classname) : 0 ;
 
364
        if ( !prs_uint16( "name_length", ps, depth, &name_length ))
 
365
                return False;
 
366
        if ( !prs_uint16( "class_length", ps, depth, &class_length ))
 
367
                return False;   
 
368
                
 
369
        if ( class_length ) {
 
370
                ;;
 
371
        }
 
372
        
 
373
        if ( name_length ) {
 
374
                if ( UNMARSHALLING(ps) ) {
 
375
                        if ( !(nk->keyname = PRS_ALLOC_MEM( ps, char, name_length+1 )) )
 
376
                                return False;
 
377
                }
 
378
 
 
379
                if ( !prs_uint8s( True, "name", ps, depth, (uint8*)nk->keyname, name_length) )
 
380
                        return False;
 
381
 
 
382
                if ( UNMARSHALLING(ps) ) 
 
383
                        nk->keyname[name_length] = '\0';
 
384
        }
 
385
 
 
386
        end_off = prs_offset( ps );
 
387
 
 
388
        /* data_size must be divisible by 8 and large enough to hold the original record */
 
389
 
 
390
        data_size = ((start_off - end_off) & 0xfffffff8 );
 
391
        if ( data_size > nk->rec_size )
 
392
                DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, nk->rec_size));
 
393
 
 
394
        if ( MARSHALLING(ps) )
 
395
                nk->hbin->dirty = True;
 
396
 
 
397
        return True;
 
398
}
 
399
 
 
400
/*******************************************************************
 
401
*******************************************************************/
 
402
 
 
403
static uint32 regf_block_checksum( prs_struct *ps )
 
404
{
 
405
        char *buffer = prs_data_p( ps );
 
406
        uint32 checksum, x;
 
407
        int i;
 
408
 
 
409
        /* XOR of all bytes 0x0000 - 0x01FB */
 
410
                
 
411
        checksum = x = 0;
 
412
        
 
413
        for ( i=0; i<0x01FB; i+=4 ) {
 
414
                x = IVAL(buffer, i );
 
415
                checksum ^= x;
 
416
        }
 
417
        
 
418
        return checksum;
 
419
}
 
420
 
 
421
/*******************************************************************
 
422
*******************************************************************/
 
423
 
 
424
static bool read_regf_block( REGF_FILE *file )
 
425
{
 
426
        prs_struct ps;
 
427
        uint32 checksum;
 
428
        
 
429
        /* grab the first block from the file */
 
430
                
 
431
        if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) == -1 )
 
432
                return False;
 
433
        
 
434
        /* parse the block and verify the checksum */
 
435
        
 
436
        if ( !prs_regf_block( "regf_header", &ps, 0, file ) )
 
437
                return False;   
 
438
                
 
439
        checksum = regf_block_checksum( &ps );
 
440
        
 
441
        prs_mem_free( &ps );
 
442
        
 
443
        if ( file->checksum !=  checksum ) {
 
444
                DEBUG(0,("read_regf_block: invalid checksum\n" ));
 
445
                return False;
 
446
        }
 
447
 
 
448
        return True;
 
449
}
 
450
 
 
451
/*******************************************************************
 
452
*******************************************************************/
 
453
 
 
454
static REGF_HBIN* read_hbin_block( REGF_FILE *file, off_t offset )
 
455
{
 
456
        REGF_HBIN *hbin;
 
457
        uint32 record_size, curr_off, block_size, header;
 
458
        
 
459
        if ( !(hbin = TALLOC_ZERO_P(file->mem_ctx, REGF_HBIN)) ) 
 
460
                return NULL;
 
461
        hbin->file_off = offset;
 
462
        hbin->free_off = -1;
 
463
                
 
464
        if ( read_block( file, &hbin->ps, offset, 0 ) == -1 )
 
465
                return NULL;
 
466
        
 
467
        if ( !prs_hbin_block( "hbin", &hbin->ps, 0, hbin ) )
 
468
                return NULL;    
 
469
 
 
470
        /* this should be the same thing as hbin->block_size but just in case */
 
471
 
 
472
        block_size = prs_data_size( &hbin->ps );        
 
473
 
 
474
        /* Find the available free space offset.  Always at the end,
 
475
           so walk the record list and stop when you get to the end.
 
476
           The end is defined by a record header of 0xffffffff.  The 
 
477
           previous 4 bytes contains the amount of free space remaining 
 
478
           in the hbin block. */
 
479
 
 
480
        /* remember that the record_size is in the 4 bytes preceeding the record itself */
 
481
 
 
482
        if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE-sizeof(uint32) ) )
 
483
                return False;
 
484
 
 
485
        record_size = 0;
 
486
        header = 0;
 
487
        curr_off = prs_offset( &hbin->ps );
 
488
        while ( header != 0xffffffff ) {
 
489
                /* not done yet so reset the current offset to the 
 
490
                   next record_size field */
 
491
 
 
492
                curr_off = curr_off+record_size;
 
493
 
 
494
                /* for some reason the record_size of the last record in
 
495
                   an hbin block can extend past the end of the block
 
496
                   even though the record fits within the remaining 
 
497
                   space....aaarrrgggghhhhhh */
 
498
 
 
499
                if ( curr_off >= block_size ) {
 
500
                        record_size = -1;
 
501
                        curr_off = -1;
 
502
                        break;
 
503
                }
 
504
 
 
505
                if ( !prs_set_offset( &hbin->ps, curr_off) )
 
506
                        return False;
 
507
 
 
508
                if ( !prs_uint32( "rec_size", &hbin->ps, 0, &record_size ) )
 
509
                        return False;
 
510
                if ( !prs_uint32( "header", &hbin->ps, 0, &header ) )
 
511
                        return False;
 
512
                
 
513
                SMB_ASSERT( record_size != 0 );
 
514
 
 
515
                if ( record_size & 0x80000000 ) {
 
516
                        /* absolute_value(record_size) */
 
517
                        record_size = (record_size ^ 0xffffffff) + 1;
 
518
                }
 
519
        }
 
520
 
 
521
        /* save the free space offset */
 
522
 
 
523
        if ( header == 0xffffffff ) {
 
524
 
 
525
                /* account for the fact that the curr_off is 4 bytes behind the actual 
 
526
                   record header */
 
527
 
 
528
                hbin->free_off = curr_off + sizeof(uint32);
 
529
                hbin->free_size = record_size;
 
530
        }
 
531
 
 
532
        DEBUG(10,("read_hbin_block: free space offset == 0x%x\n", hbin->free_off));
 
533
 
 
534
        if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE )  )
 
535
                return False;
 
536
        
 
537
        return hbin;
 
538
}
 
539
 
 
540
/*******************************************************************
 
541
 Input a random offset and receive the corresponding HBIN 
 
542
 block for it
 
543
*******************************************************************/
 
544
 
 
545
static bool hbin_contains_offset( REGF_HBIN *hbin, uint32 offset )
 
546
{
 
547
        if ( !hbin )
 
548
                return False;
 
549
        
 
550
        if ( (offset > hbin->first_hbin_off) && (offset < (hbin->first_hbin_off+hbin->block_size)) )
 
551
                return True;
 
552
                
 
553
        return False;
 
554
}
 
555
 
 
556
/*******************************************************************
 
557
 Input a random offset and receive the corresponding HBIN 
 
558
 block for it
 
559
*******************************************************************/
 
560
 
 
561
static REGF_HBIN* lookup_hbin_block( REGF_FILE *file, uint32 offset )
 
562
{
 
563
        REGF_HBIN *hbin = NULL;
 
564
        uint32 block_off;
 
565
 
 
566
        /* start with the open list */
 
567
 
 
568
        for ( hbin=file->block_list; hbin; hbin=hbin->next ) {
 
569
                DEBUG(10,("lookup_hbin_block: address = 0x%x [0x%lx]\n", hbin->file_off, (unsigned long)hbin ));
 
570
                if ( hbin_contains_offset( hbin, offset ) )
 
571
                        return hbin;
 
572
        }
 
573
        
 
574
        if ( !hbin ) {
 
575
                /* start at the beginning */
 
576
 
 
577
                block_off = REGF_BLOCKSIZE;
 
578
                do {
 
579
                        /* cleanup before the next round */
 
580
                        if ( hbin )
 
581
                                prs_mem_free( &hbin->ps );
 
582
 
 
583
                        hbin = read_hbin_block( file, block_off );
 
584
 
 
585
                        if ( hbin ) 
 
586
                                block_off = hbin->file_off + hbin->block_size;
 
587
 
 
588
                } while ( hbin && !hbin_contains_offset( hbin, offset ) );
 
589
        }
 
590
 
 
591
        if ( hbin )
 
592
                DLIST_ADD( file->block_list, hbin );
 
593
 
 
594
        return hbin;
 
595
}
 
596
 
 
597
/*******************************************************************
 
598
*******************************************************************/
 
599
 
 
600
static bool prs_hash_rec( const char *desc, prs_struct *ps, int depth, REGF_HASH_REC *hash )
 
601
{
 
602
        prs_debug(ps, depth, desc, "prs_hash_rec");
 
603
        depth++;
 
604
 
 
605
        if ( !prs_uint32( "nk_off", ps, depth, &hash->nk_off ))
 
606
                return False;
 
607
        if ( !prs_uint8s( True, "keycheck", ps, depth, hash->keycheck, sizeof( hash->keycheck )) )
 
608
                return False;
 
609
        
 
610
        return True;
 
611
}
 
612
 
 
613
/*******************************************************************
 
614
*******************************************************************/
 
615
 
 
616
static bool hbin_prs_lf_records( const char *desc, REGF_HBIN *hbin, int depth, REGF_NK_REC *nk )
 
617
{
 
618
        int i;
 
619
        REGF_LF_REC *lf = &nk->subkeys;
 
620
        uint32 data_size, start_off, end_off;
 
621
 
 
622
        prs_debug(&hbin->ps, depth, desc, "prs_lf_records");
 
623
        depth++;
 
624
 
 
625
        /* check if we have anything to do first */
 
626
        
 
627
        if ( nk->num_subkeys == 0 )
 
628
                return True;
 
629
 
 
630
        /* move to the LF record */
 
631
 
 
632
        if ( !prs_set_offset( &hbin->ps, nk->subkeys_off + HBIN_HDR_SIZE - hbin->first_hbin_off ) )
 
633
                return False;
 
634
 
 
635
        /* backup and get the data_size */
 
636
        
 
637
        if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
 
638
                return False;
 
639
        start_off = prs_offset( &hbin->ps );
 
640
        if ( !prs_uint32( "rec_size", &hbin->ps, depth, &lf->rec_size ))
 
641
                return False;
 
642
 
 
643
        if ( !prs_uint8s( True, "header", &hbin->ps, depth, (uint8*)lf->header, sizeof( lf->header )) )
 
644
                return False;
 
645
                
 
646
        if ( !prs_uint16( "num_keys", &hbin->ps, depth, &lf->num_keys))
 
647
                return False;
 
648
 
 
649
        if ( UNMARSHALLING(&hbin->ps) ) {
 
650
                if (lf->num_keys) {
 
651
                        if ( !(lf->hashes = PRS_ALLOC_MEM( &hbin->ps, REGF_HASH_REC, lf->num_keys )) )
 
652
                                return False;
 
653
                } else {
 
654
                        lf->hashes = NULL;
 
655
                }
 
656
        }
 
657
 
 
658
        for ( i=0; i<lf->num_keys; i++ ) {
 
659
                if ( !prs_hash_rec( "hash_rec", &hbin->ps, depth, &lf->hashes[i] ) )
 
660
                        return False;
 
661
        }
 
662
 
 
663
        end_off = prs_offset( &hbin->ps );
 
664
 
 
665
        /* data_size must be divisible by 8 and large enough to hold the original record */
 
666
 
 
667
        data_size = ((start_off - end_off) & 0xfffffff8 );
 
668
        if ( data_size > lf->rec_size )
 
669
                DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, lf->rec_size));
 
670
 
 
671
        if ( MARSHALLING(&hbin->ps) )
 
672
                hbin->dirty = True;
 
673
 
 
674
        return True;
 
675
}
 
676
 
 
677
/*******************************************************************
 
678
*******************************************************************/
 
679
 
 
680
static bool hbin_prs_sk_rec( const char *desc, REGF_HBIN *hbin, int depth, REGF_SK_REC *sk )
 
681
{
 
682
        prs_struct *ps = &hbin->ps;
 
683
        uint16 tag = 0xFFFF;
 
684
        uint32 data_size, start_off, end_off;
 
685
 
 
686
 
 
687
        prs_debug(ps, depth, desc, "hbin_prs_sk_rec");
 
688
        depth++;
 
689
 
 
690
        if ( !prs_set_offset( &hbin->ps, sk->sk_off + HBIN_HDR_SIZE - hbin->first_hbin_off ) )
 
691
                return False;
 
692
 
 
693
        /* backup and get the data_size */
 
694
        
 
695
        if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
 
696
                return False;
 
697
        start_off = prs_offset( &hbin->ps );
 
698
        if ( !prs_uint32( "rec_size", &hbin->ps, depth, &sk->rec_size ))
 
699
                return False;
 
700
 
 
701
        if ( !prs_uint8s( True, "header", ps, depth, (uint8*)sk->header, sizeof( sk->header )) )
 
702
                return False;
 
703
        if ( !prs_uint16( "tag", ps, depth, &tag))
 
704
                return False;
 
705
 
 
706
        if ( !prs_uint32( "prev_sk_off", ps, depth, &sk->prev_sk_off))
 
707
                return False;
 
708
        if ( !prs_uint32( "next_sk_off", ps, depth, &sk->next_sk_off))
 
709
                return False;
 
710
        if ( !prs_uint32( "ref_count", ps, depth, &sk->ref_count))
 
711
                return False;
 
712
        if ( !prs_uint32( "size", ps, depth, &sk->size))
 
713
                return False;
 
714
 
 
715
        {
 
716
                NTSTATUS status;
 
717
                TALLOC_CTX *mem_ctx = prs_get_mem_context(&hbin->ps);
 
718
                DATA_BLOB blob;
 
719
 
 
720
                if (MARSHALLING(&hbin->ps)) {
 
721
                        status = marshall_sec_desc(mem_ctx,
 
722
                                                   sk->sec_desc,
 
723
                                                   &blob.data, &blob.length);
 
724
                        if (!NT_STATUS_IS_OK(status))
 
725
                                return False;
 
726
                        if (!prs_copy_data_in(&hbin->ps, (const char *)blob.data, blob.length))
 
727
                                return False;
 
728
                } else {
 
729
                        blob = data_blob_const(prs_data_p(&hbin->ps),
 
730
                                               prs_data_size(&hbin->ps));
 
731
                        status = unmarshall_sec_desc(mem_ctx,
 
732
                                                     blob.data, blob.length,
 
733
                                                     &sk->sec_desc);
 
734
                        if (!NT_STATUS_IS_OK(status))
 
735
                                return False;
 
736
                        prs_set_offset(&hbin->ps, blob.length);
 
737
                }
 
738
        }
 
739
 
 
740
        end_off = prs_offset( &hbin->ps );
 
741
 
 
742
        /* data_size must be divisible by 8 and large enough to hold the original record */
 
743
 
 
744
        data_size = ((start_off - end_off) & 0xfffffff8 );
 
745
        if ( data_size > sk->rec_size )
 
746
                DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, sk->rec_size));
 
747
 
 
748
        if ( MARSHALLING(&hbin->ps) )
 
749
                hbin->dirty = True;
 
750
 
 
751
        return True;
 
752
}
 
753
 
 
754
/*******************************************************************
 
755
*******************************************************************/
 
756
 
 
757
static bool hbin_prs_vk_rec( const char *desc, REGF_HBIN *hbin, int depth, REGF_VK_REC *vk, REGF_FILE *file )
 
758
{
 
759
        uint32 offset;
 
760
        uint16 name_length;
 
761
        prs_struct *ps = &hbin->ps;
 
762
        uint32 data_size, start_off, end_off;
 
763
 
 
764
        prs_debug(ps, depth, desc, "prs_vk_rec");
 
765
        depth++;
 
766
 
 
767
        /* backup and get the data_size */
 
768
        
 
769
        if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32)) )
 
770
                return False;
 
771
        start_off = prs_offset( &hbin->ps );
 
772
        if ( !prs_uint32( "rec_size", &hbin->ps, depth, &vk->rec_size ))
 
773
                return False;
 
774
 
 
775
        if ( !prs_uint8s( True, "header", ps, depth, (uint8*)vk->header, sizeof( vk->header )) )
 
776
                return False;
 
777
 
 
778
        if ( MARSHALLING(&hbin->ps) )
 
779
                name_length = strlen(vk->valuename);
 
780
 
 
781
        if ( !prs_uint16( "name_length", ps, depth, &name_length ))
 
782
                return False;
 
783
        if ( !prs_uint32( "data_size", ps, depth, &vk->data_size ))
 
784
                return False;
 
785
        if ( !prs_uint32( "data_off", ps, depth, &vk->data_off ))
 
786
                return False;
 
787
        if ( !prs_uint32( "type", ps, depth, &vk->type))
 
788
                return False;
 
789
        if ( !prs_uint16( "flag", ps, depth, &vk->flag))
 
790
                return False;
 
791
 
 
792
        offset = prs_offset( ps );
 
793
        offset += 2;    /* skip 2 bytes */
 
794
        prs_set_offset( ps, offset );
 
795
 
 
796
        /* get the name */
 
797
 
 
798
        if ( vk->flag&VK_FLAG_NAME_PRESENT ) {
 
799
 
 
800
                if ( UNMARSHALLING(&hbin->ps) ) {
 
801
                        if ( !(vk->valuename = PRS_ALLOC_MEM( ps, char, name_length+1 )))
 
802
                                return False;
 
803
                }
 
804
                if ( !prs_uint8s( True, "name", ps, depth, (uint8*)vk->valuename, name_length ) )
 
805
                        return False;
 
806
        }
 
807
 
 
808
        end_off = prs_offset( &hbin->ps );
 
809
 
 
810
        /* get the data if necessary */
 
811
 
 
812
        if ( vk->data_size != 0 ) {
 
813
                bool charmode = False;
 
814
 
 
815
                if ( (vk->type == REG_SZ) || (vk->type == REG_MULTI_SZ) )
 
816
                        charmode = True;
 
817
 
 
818
                /* the data is stored in the offset if the size <= 4 */
 
819
 
 
820
                if ( !(vk->data_size & VK_DATA_IN_OFFSET) ) {
 
821
                        REGF_HBIN *hblock = hbin;
 
822
                        uint32 data_rec_size;
 
823
 
 
824
                        if ( UNMARSHALLING(&hbin->ps) ) {
 
825
                                if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8, vk->data_size) ) )
 
826
                                        return False;
 
827
                        }
 
828
 
 
829
                        /* this data can be in another hbin */
 
830
                        if ( !hbin_contains_offset( hbin, vk->data_off ) ) {
 
831
                                if ( !(hblock = lookup_hbin_block( file, vk->data_off )) )
 
832
                                        return False;
 
833
                        }
 
834
                        if ( !(prs_set_offset( &hblock->ps, (vk->data_off+HBIN_HDR_SIZE-hblock->first_hbin_off)-sizeof(uint32) )) )
 
835
                                return False;
 
836
 
 
837
                        if ( MARSHALLING(&hblock->ps) ) {
 
838
                                data_rec_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
 
839
                                data_rec_size = ( data_rec_size - 1 ) ^ 0xFFFFFFFF;
 
840
                        }
 
841
                        if ( !prs_uint32( "data_rec_size", &hblock->ps, depth, &data_rec_size ))
 
842
                                return False;
 
843
                        if ( !prs_uint8s( charmode, "data", &hblock->ps, depth, vk->data, vk->data_size) )
 
844
                                return False;
 
845
 
 
846
                        if ( MARSHALLING(&hblock->ps) )
 
847
                                hblock->dirty = True;
 
848
                }
 
849
                else {
 
850
                        if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8, 4 ) ) )
 
851
                                return False;
 
852
                        SIVAL( vk->data, 0, vk->data_off );
 
853
                }
 
854
                
 
855
        }
 
856
 
 
857
        /* data_size must be divisible by 8 and large enough to hold the original record */
 
858
 
 
859
        data_size = ((start_off - end_off ) & 0xfffffff8 );
 
860
        if ( data_size !=  vk->rec_size )
 
861
                DEBUG(10,("prs_vk_rec: data_size check failed (0x%x < 0x%x)\n", data_size, vk->rec_size));
 
862
 
 
863
        if ( MARSHALLING(&hbin->ps) )
 
864
                hbin->dirty = True;
 
865
 
 
866
        return True;
 
867
}
 
868
 
 
869
/*******************************************************************
 
870
 read a VK record which is contained in the HBIN block stored 
 
871
 in the prs_struct *ps.
 
872
*******************************************************************/
 
873
 
 
874
static bool hbin_prs_vk_records( const char *desc, REGF_HBIN *hbin, int depth, REGF_NK_REC *nk, REGF_FILE *file )
 
875
{
 
876
        int i;
 
877
        uint32 record_size;
 
878
 
 
879
        prs_debug(&hbin->ps, depth, desc, "prs_vk_records");
 
880
        depth++;
 
881
        
 
882
        /* check if we have anything to do first */
 
883
        
 
884
        if ( nk->num_values == 0 )
 
885
                return True;
 
886
                
 
887
        if ( UNMARSHALLING(&hbin->ps) ) {
 
888
                if ( !(nk->values = PRS_ALLOC_MEM( &hbin->ps, REGF_VK_REC, nk->num_values ) ) )
 
889
                        return False;
 
890
        }
 
891
        
 
892
        /* convert the offset to something relative to this HBIN block */
 
893
        
 
894
        if ( !prs_set_offset( &hbin->ps, nk->values_off+HBIN_HDR_SIZE-hbin->first_hbin_off-sizeof(uint32)) )
 
895
                return False;
 
896
 
 
897
        if ( MARSHALLING( &hbin->ps) ) { 
 
898
                record_size = ( ( nk->num_values * sizeof(uint32) ) & 0xfffffff8 ) + 8;
 
899
                record_size = (record_size - 1) ^ 0xFFFFFFFF;
 
900
        }
 
901
 
 
902
        if ( !prs_uint32( "record_size", &hbin->ps, depth, &record_size ) )
 
903
                return False;
 
904
                
 
905
        for ( i=0; i<nk->num_values; i++ ) {
 
906
                if ( !prs_uint32( "vk_off", &hbin->ps, depth, &nk->values[i].rec_off ) )
 
907
                        return False;
 
908
        }
 
909
 
 
910
        for ( i=0; i<nk->num_values; i++ ) {
 
911
                REGF_HBIN *sub_hbin = hbin;
 
912
                uint32 new_offset;
 
913
        
 
914
                if ( !hbin_contains_offset( hbin, nk->values[i].rec_off ) ) {
 
915
                        sub_hbin = lookup_hbin_block( file, nk->values[i].rec_off );
 
916
                        if ( !sub_hbin ) {
 
917
                                DEBUG(0,("hbin_prs_vk_records: Failed to find HBIN block containing offset [0x%x]\n", 
 
918
                                        nk->values[i].hbin_off));
 
919
                                return False;
 
920
                        }
 
921
                }
 
922
                
 
923
                new_offset = nk->values[i].rec_off + HBIN_HDR_SIZE - sub_hbin->first_hbin_off;
 
924
                if ( !prs_set_offset( &sub_hbin->ps, new_offset ) )
 
925
                        return False;
 
926
                if ( !hbin_prs_vk_rec( "vk_rec", sub_hbin, depth, &nk->values[i], file ) )
 
927
                        return False;
 
928
        }
 
929
 
 
930
        if ( MARSHALLING(&hbin->ps) )
 
931
                hbin->dirty = True;
 
932
 
 
933
 
 
934
        return True;
 
935
}
 
936
 
 
937
 
 
938
/*******************************************************************
 
939
*******************************************************************/
 
940
 
 
941
static REGF_SK_REC* find_sk_record_by_offset( REGF_FILE *file, uint32 offset )
 
942
{
 
943
        REGF_SK_REC *p_sk;
 
944
        
 
945
        for ( p_sk=file->sec_desc_list; p_sk; p_sk=p_sk->next ) {
 
946
                if ( p_sk->sk_off == offset ) 
 
947
                        return p_sk;
 
948
        }
 
949
        
 
950
        return NULL;
 
951
}
 
952
 
 
953
/*******************************************************************
 
954
*******************************************************************/
 
955
 
 
956
static REGF_SK_REC* find_sk_record_by_sec_desc( REGF_FILE *file, SEC_DESC *sd )
 
957
{
 
958
        REGF_SK_REC *p;
 
959
 
 
960
        for ( p=file->sec_desc_list; p; p=p->next ) {
 
961
                if ( sec_desc_equal( p->sec_desc, sd ) )
 
962
                        return p;
 
963
        }
 
964
 
 
965
        /* failure */
 
966
 
 
967
        return NULL;
 
968
}
 
969
 
 
970
/*******************************************************************
 
971
*******************************************************************/
 
972
 
 
973
static bool hbin_prs_key( REGF_FILE *file, REGF_HBIN *hbin, REGF_NK_REC *nk )
 
974
{
 
975
        int depth = 0;
 
976
        REGF_HBIN *sub_hbin;
 
977
        
 
978
        prs_debug(&hbin->ps, depth, "", "fetch_key");
 
979
        depth++;
 
980
 
 
981
        /* get the initial nk record */
 
982
        
 
983
        if ( !prs_nk_rec( "nk_rec", &hbin->ps, depth, nk ))
 
984
                return False;
 
985
 
 
986
        /* fill in values */
 
987
        
 
988
        if ( nk->num_values && (nk->values_off!=REGF_OFFSET_NONE) ) {
 
989
                sub_hbin = hbin;
 
990
                if ( !hbin_contains_offset( hbin, nk->values_off ) ) {
 
991
                        sub_hbin = lookup_hbin_block( file, nk->values_off );
 
992
                        if ( !sub_hbin ) {
 
993
                                DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing value_list_offset [0x%x]\n", 
 
994
                                        nk->values_off));
 
995
                                return False;
 
996
                        }
 
997
                }
 
998
                
 
999
                if ( !hbin_prs_vk_records( "vk_rec", sub_hbin, depth, nk, file ))
 
1000
                        return False;
 
1001
        }
 
1002
                
 
1003
        /* now get subkeys */
 
1004
        
 
1005
        if ( nk->num_subkeys && (nk->subkeys_off!=REGF_OFFSET_NONE) ) {
 
1006
                sub_hbin = hbin;
 
1007
                if ( !hbin_contains_offset( hbin, nk->subkeys_off ) ) {
 
1008
                        sub_hbin = lookup_hbin_block( file, nk->subkeys_off );
 
1009
                        if ( !sub_hbin ) {
 
1010
                                DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing subkey_offset [0x%x]\n", 
 
1011
                                        nk->subkeys_off));
 
1012
                                return False;
 
1013
                        }
 
1014
                }
 
1015
                
 
1016
                if ( !hbin_prs_lf_records( "lf_rec", sub_hbin, depth, nk ))
 
1017
                        return False;
 
1018
        }
 
1019
 
 
1020
        /* get the to the security descriptor.  First look if we have already parsed it */
 
1021
        
 
1022
        if ( (nk->sk_off!=REGF_OFFSET_NONE) && !( nk->sec_desc = find_sk_record_by_offset( file, nk->sk_off )) ) {
 
1023
 
 
1024
                sub_hbin = hbin;
 
1025
                if ( !hbin_contains_offset( hbin, nk->sk_off ) ) {
 
1026
                        sub_hbin = lookup_hbin_block( file, nk->sk_off );
 
1027
                        if ( !sub_hbin ) {
 
1028
                                DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing sk_offset [0x%x]\n", 
 
1029
                                        nk->subkeys_off));
 
1030
                                return False;
 
1031
                        }
 
1032
                }
 
1033
                
 
1034
                if ( !(nk->sec_desc = TALLOC_ZERO_P( file->mem_ctx, REGF_SK_REC )) )
 
1035
                        return False;
 
1036
                nk->sec_desc->sk_off = nk->sk_off;
 
1037
                if ( !hbin_prs_sk_rec( "sk_rec", sub_hbin, depth, nk->sec_desc ))
 
1038
                        return False;
 
1039
                        
 
1040
                /* add to the list of security descriptors (ref_count has been read from the files) */
 
1041
 
 
1042
                nk->sec_desc->sk_off = nk->sk_off;
 
1043
                DLIST_ADD( file->sec_desc_list, nk->sec_desc );
 
1044
        }
 
1045
                
 
1046
        return True;
 
1047
}
 
1048
 
 
1049
/*******************************************************************
 
1050
*******************************************************************/
 
1051
 
 
1052
static bool next_record( REGF_HBIN *hbin, const char *hdr, bool *eob )
 
1053
{
 
1054
        uint8 header[REC_HDR_SIZE];
 
1055
        uint32 record_size;
 
1056
        uint32 curr_off, block_size;
 
1057
        bool found = False;
 
1058
        prs_struct *ps = &hbin->ps;
 
1059
        
 
1060
        curr_off = prs_offset( ps );
 
1061
        if ( curr_off == 0 )
 
1062
                prs_set_offset( ps, HBIN_HEADER_REC_SIZE );
 
1063
 
 
1064
        /* assume that the current offset is at the record header 
 
1065
           and we need to backup to read the record size */
 
1066
 
 
1067
        curr_off -= sizeof(uint32);
 
1068
 
 
1069
        block_size = prs_data_size( ps );
 
1070
        record_size = 0;
 
1071
        memset( header, 0x0, sizeof(uint8)*REC_HDR_SIZE );
 
1072
        while ( !found ) {
 
1073
 
 
1074
                curr_off = curr_off+record_size;
 
1075
                if ( curr_off >= block_size ) 
 
1076
                        break;
 
1077
 
 
1078
                if ( !prs_set_offset( &hbin->ps, curr_off) )
 
1079
                        return False;
 
1080
 
 
1081
                if ( !prs_uint32( "record_size", ps, 0, &record_size ) )
 
1082
                        return False;
 
1083
                if ( !prs_uint8s( True, "header", ps, 0, header, REC_HDR_SIZE ) )
 
1084
                        return False;
 
1085
 
 
1086
                if ( record_size & 0x80000000 ) {
 
1087
                        /* absolute_value(record_size) */
 
1088
                        record_size = (record_size ^ 0xffffffff) + 1;
 
1089
                }
 
1090
 
 
1091
                if ( memcmp( header, hdr, REC_HDR_SIZE ) == 0 ) {
 
1092
                        found = True;
 
1093
                        curr_off += sizeof(uint32);
 
1094
                }
 
1095
        } 
 
1096
 
 
1097
        /* mark prs_struct as done ( at end ) if no more SK records */
 
1098
        /* mark end-of-block as True */
 
1099
        
 
1100
        if ( !found ) {
 
1101
                prs_set_offset( &hbin->ps, prs_data_size(&hbin->ps) );
 
1102
                *eob = True;
 
1103
                return False;
 
1104
        }
 
1105
                
 
1106
        if ( !prs_set_offset( ps, curr_off ) )
 
1107
                return False;
 
1108
 
 
1109
        return True;
 
1110
}
 
1111
 
 
1112
/*******************************************************************
 
1113
*******************************************************************/
 
1114
 
 
1115
static bool next_nk_record( REGF_FILE *file, REGF_HBIN *hbin, REGF_NK_REC *nk, bool *eob )
 
1116
{
 
1117
        if ( next_record( hbin, "nk", eob ) && hbin_prs_key( file, hbin, nk ) )
 
1118
                return True;
 
1119
        
 
1120
        return False;
 
1121
}
 
1122
 
 
1123
/*******************************************************************
 
1124
 Intialize the newly created REGF_BLOCK in *file and write the 
 
1125
 block header to disk 
 
1126
*******************************************************************/
 
1127
 
 
1128
static bool init_regf_block( REGF_FILE *file )
 
1129
{       
 
1130
        prs_struct ps;
 
1131
        bool result = True;
 
1132
        
 
1133
        if ( !prs_init( &ps, REGF_BLOCKSIZE, file->mem_ctx, MARSHALL ) )
 
1134
                return False;
 
1135
                
 
1136
        memcpy( file->header, "regf", REGF_HDR_SIZE );
 
1137
        file->data_offset = 0x20;
 
1138
        file->last_block  = 0x1000;
 
1139
        
 
1140
        /* set mod time */
 
1141
        
 
1142
        unix_to_nt_time( &file->mtime, time(NULL) );
 
1143
        
 
1144
        /* hard coded values...no diea what these are ... maybe in time */
 
1145
        
 
1146
        file->unknown1 = 0x2;
 
1147
        file->unknown2 = 0x1;
 
1148
        file->unknown3 = 0x3;
 
1149
        file->unknown4 = 0x0;
 
1150
        file->unknown5 = 0x1;
 
1151
        file->unknown6 = 0x1;
 
1152
        
 
1153
        /* write header to the buffer */
 
1154
        
 
1155
        if ( !prs_regf_block( "regf_header", &ps, 0, file ) ) {
 
1156
                result = False;
 
1157
                goto out;
 
1158
        }
 
1159
        
 
1160
        /* calculate the checksum, re-marshall data (to include the checksum) 
 
1161
           and write to disk */
 
1162
        
 
1163
        file->checksum = regf_block_checksum( &ps );
 
1164
        prs_set_offset( &ps, 0 );
 
1165
        if ( !prs_regf_block( "regf_header", &ps, 0, file ) ) {
 
1166
                result = False;
 
1167
                goto out;
 
1168
        }
 
1169
                
 
1170
        if ( write_block( file, &ps, 0 ) == -1 ) {
 
1171
                DEBUG(0,("init_regf_block: Failed to initialize registry header block!\n"));
 
1172
                result = False;
 
1173
                goto out;
 
1174
        }
 
1175
        
 
1176
out:
 
1177
        prs_mem_free( &ps );
 
1178
 
 
1179
        return result;
 
1180
}
 
1181
/*******************************************************************
 
1182
 Open the registry file and then read in the REGF block to get the 
 
1183
 first hbin offset.
 
1184
*******************************************************************/
 
1185
 
 
1186
 REGF_FILE* regfio_open( const char *filename, int flags, int mode )
 
1187
{
 
1188
        REGF_FILE *rb;
 
1189
        
 
1190
        if ( !(rb = SMB_MALLOC_P(REGF_FILE)) ) {
 
1191
                DEBUG(0,("ERROR allocating memory\n"));
 
1192
                return NULL;
 
1193
        }
 
1194
        ZERO_STRUCTP( rb );
 
1195
        rb->fd = -1;
 
1196
        
 
1197
        if ( !(rb->mem_ctx = talloc_init( "read_regf_block" )) ) {
 
1198
                regfio_close( rb );
 
1199
                return NULL;
 
1200
        }
 
1201
 
 
1202
        rb->open_flags = flags;
 
1203
        
 
1204
        /* open and existing file */
 
1205
 
 
1206
        if ( (rb->fd = open(filename, flags, mode)) == -1 ) {
 
1207
                DEBUG(0,("regfio_open: failure to open %s (%s)\n", filename, strerror(errno)));
 
1208
                regfio_close( rb );
 
1209
                return NULL;
 
1210
        }
 
1211
        
 
1212
        /* check if we are creating a new file or overwriting an existing one */
 
1213
                
 
1214
        if ( flags & (O_CREAT|O_TRUNC) ) {
 
1215
                if ( !init_regf_block( rb ) ) {
 
1216
                        DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));
 
1217
                        regfio_close( rb );
 
1218
                        return NULL;
 
1219
                }
 
1220
                
 
1221
                /* success */
 
1222
                return rb;
 
1223
        }
 
1224
        
 
1225
        /* read in an existing file */
 
1226
        
 
1227
        if ( !read_regf_block( rb ) ) {
 
1228
                DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));
 
1229
                regfio_close( rb );
 
1230
                return NULL;
 
1231
        }
 
1232
        
 
1233
        /* success */
 
1234
        
 
1235
        return rb;
 
1236
}
 
1237
 
 
1238
/*******************************************************************
 
1239
*******************************************************************/
 
1240
 
 
1241
static void regfio_mem_free( REGF_FILE *file )
 
1242
{
 
1243
        /* free any talloc()'d memory */
 
1244
        
 
1245
        if ( file && file->mem_ctx )
 
1246
                talloc_destroy( file->mem_ctx );        
 
1247
}
 
1248
 
 
1249
/*******************************************************************
 
1250
*******************************************************************/
 
1251
 
 
1252
 int regfio_close( REGF_FILE *file )
 
1253
{
 
1254
        int fd;
 
1255
 
 
1256
        /* cleanup for a file opened for write */
 
1257
 
 
1258
        if ((file->fd != -1) && (file->open_flags & (O_WRONLY|O_RDWR))) {
 
1259
                prs_struct ps;
 
1260
                REGF_SK_REC *sk;
 
1261
 
 
1262
                /* write of sd list */
 
1263
 
 
1264
                for ( sk=file->sec_desc_list; sk; sk=sk->next ) {
 
1265
                        hbin_prs_sk_rec( "sk_rec", sk->hbin, 0, sk );
 
1266
                }
 
1267
 
 
1268
                /* flush any dirty blocks */
 
1269
 
 
1270
                while ( file->block_list ) {
 
1271
                        hbin_block_close( file, file->block_list );
 
1272
                } 
 
1273
 
 
1274
                ZERO_STRUCT( ps );
 
1275
 
 
1276
                unix_to_nt_time( &file->mtime, time(NULL) );
 
1277
 
 
1278
                if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) != -1 ) {
 
1279
                        /* now use for writing */
 
1280
                        prs_switch_type( &ps, MARSHALL );
 
1281
 
 
1282
                        /* stream the block once, generate the checksum, 
 
1283
                           and stream it again */
 
1284
                        prs_set_offset( &ps, 0 );
 
1285
                        prs_regf_block( "regf_blocK", &ps, 0, file );
 
1286
                        file->checksum = regf_block_checksum( &ps );
 
1287
                        prs_set_offset( &ps, 0 );
 
1288
                        prs_regf_block( "regf_blocK", &ps, 0, file );
 
1289
 
 
1290
                        /* now we are ready to write it to disk */
 
1291
                        if ( write_block( file, &ps, 0 ) == -1 )
 
1292
                                DEBUG(0,("regfio_close: failed to update the regf header block!\n"));
 
1293
                }
 
1294
 
 
1295
                prs_mem_free( &ps );
 
1296
        }
 
1297
        
 
1298
        regfio_mem_free( file );
 
1299
 
 
1300
        /* nothing tdo do if there is no open file */
 
1301
 
 
1302
        if (file->fd == -1)
 
1303
                return 0;
 
1304
                
 
1305
        fd = file->fd;
 
1306
        file->fd = -1;
 
1307
        SAFE_FREE( file );
 
1308
 
 
1309
        return close( fd );
 
1310
}
 
1311
 
 
1312
/*******************************************************************
 
1313
*******************************************************************/
 
1314
 
 
1315
static void regfio_flush( REGF_FILE *file )
 
1316
{
 
1317
        REGF_HBIN *hbin;
 
1318
 
 
1319
        for ( hbin=file->block_list; hbin; hbin=hbin->next ) {
 
1320
                write_hbin_block( file, hbin );
 
1321
        }
 
1322
}
 
1323
 
 
1324
/*******************************************************************
 
1325
 There should be only *one* root key in the registry file based 
 
1326
 on my experience.  --jerry
 
1327
*******************************************************************/
 
1328
 
 
1329
REGF_NK_REC* regfio_rootkey( REGF_FILE *file )
 
1330
{
 
1331
        REGF_NK_REC *nk;
 
1332
        REGF_HBIN   *hbin;
 
1333
        uint32      offset = REGF_BLOCKSIZE;
 
1334
        bool        found = False;
 
1335
        bool        eob;
 
1336
        
 
1337
        if ( !file )
 
1338
                return NULL;
 
1339
                
 
1340
        if ( !(nk = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) ) {
 
1341
                DEBUG(0,("regfio_rootkey: talloc() failed!\n"));
 
1342
                return NULL;
 
1343
        }
 
1344
        
 
1345
        /* scan through the file on HBIN block at a time looking 
 
1346
           for an NK record with a type == 0x002c.
 
1347
           Normally this is the first nk record in the first hbin 
 
1348
           block (but I'm not assuming that for now) */
 
1349
        
 
1350
        while ( (hbin = read_hbin_block( file, offset )) ) {
 
1351
                eob = False;
 
1352
 
 
1353
                while ( !eob) {
 
1354
                        if ( next_nk_record( file, hbin, nk, &eob ) ) {
 
1355
                                if ( nk->key_type == NK_TYPE_ROOTKEY ) {
 
1356
                                        found = True;
 
1357
                                        break;
 
1358
                                }
 
1359
                        }
 
1360
                        prs_mem_free( &hbin->ps );
 
1361
                }
 
1362
                
 
1363
                if ( found ) 
 
1364
                        break;
 
1365
 
 
1366
                offset += hbin->block_size;
 
1367
        }
 
1368
        
 
1369
        if ( !found ) {
 
1370
                DEBUG(0,("regfio_rootkey: corrupt registry file ?  No root key record located\n"));
 
1371
                return NULL;
 
1372
        }
 
1373
 
 
1374
        DLIST_ADD( file->block_list, hbin );
 
1375
 
 
1376
        return nk;              
 
1377
}
 
1378
 
 
1379
/*******************************************************************
 
1380
 This acts as an interator over the subkeys defined for a given 
 
1381
 NK record.  Remember that offsets are from the *first* HBIN block.
 
1382
*******************************************************************/
 
1383
 
 
1384
 REGF_NK_REC* regfio_fetch_subkey( REGF_FILE *file, REGF_NK_REC *nk )
 
1385
{
 
1386
        REGF_NK_REC *subkey;
 
1387
        REGF_HBIN   *hbin;
 
1388
        uint32      nk_offset;
 
1389
 
 
1390
        /* see if there is anything left to report */
 
1391
        
 
1392
        if ( !nk || (nk->subkeys_off==REGF_OFFSET_NONE) || (nk->subkey_index >= nk->num_subkeys) )
 
1393
                return NULL;
 
1394
 
 
1395
        /* find the HBIN block which should contain the nk record */
 
1396
        
 
1397
        if ( !(hbin = lookup_hbin_block( file, nk->subkeys.hashes[nk->subkey_index].nk_off )) ) {
 
1398
                DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing offset [0x%x]\n", 
 
1399
                        nk->subkeys.hashes[nk->subkey_index].nk_off));
 
1400
                return NULL;
 
1401
        }
 
1402
        
 
1403
        nk_offset = nk->subkeys.hashes[nk->subkey_index].nk_off;
 
1404
        if ( !prs_set_offset( &hbin->ps, (HBIN_HDR_SIZE + nk_offset - hbin->first_hbin_off) ) )
 
1405
                return NULL;
 
1406
                
 
1407
        nk->subkey_index++;
 
1408
        if ( !(subkey = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) )
 
1409
                return NULL;
 
1410
                
 
1411
        if ( !hbin_prs_key( file, hbin, subkey ) )
 
1412
                return NULL;
 
1413
        
 
1414
        return subkey;
 
1415
}
 
1416
 
 
1417
 
 
1418
/*******************************************************************
 
1419
*******************************************************************/
 
1420
 
 
1421
static REGF_HBIN* regf_hbin_allocate( REGF_FILE *file, uint32 block_size )
 
1422
{
 
1423
        REGF_HBIN *hbin;
 
1424
        SMB_STRUCT_STAT sbuf;
 
1425
 
 
1426
        if ( !(hbin = TALLOC_ZERO_P( file->mem_ctx, REGF_HBIN )) )
 
1427
                return NULL;
 
1428
 
 
1429
        memcpy( hbin->header, "hbin", sizeof(HBIN_HDR_SIZE) );
 
1430
 
 
1431
 
 
1432
        if ( sys_fstat( file->fd, &sbuf ) ) {
 
1433
                DEBUG(0,("regf_hbin_allocate: stat() failed! (%s)\n", strerror(errno)));
 
1434
                return NULL;
 
1435
        }
 
1436
 
 
1437
        hbin->file_off       = sbuf.st_size;
 
1438
 
 
1439
        hbin->free_off       = HBIN_HEADER_REC_SIZE;
 
1440
        hbin->free_size      = block_size - hbin->free_off + sizeof(uint32);;
 
1441
 
 
1442
        hbin->block_size     = block_size;
 
1443
        hbin->first_hbin_off = hbin->file_off - REGF_BLOCKSIZE;
 
1444
 
 
1445
        if ( !prs_init( &hbin->ps, block_size, file->mem_ctx, MARSHALL ) )
 
1446
                return NULL;
 
1447
 
 
1448
        if ( !prs_hbin_block( "new_hbin", &hbin->ps, 0, hbin ) )
 
1449
                return NULL;
 
1450
 
 
1451
        if ( !write_hbin_block( file, hbin ) )
 
1452
                return NULL;
 
1453
 
 
1454
        file->last_block = hbin->file_off;
 
1455
 
 
1456
        return hbin;
 
1457
}
 
1458
 
 
1459
/*******************************************************************
 
1460
*******************************************************************/
 
1461
 
 
1462
static void update_free_space( REGF_HBIN *hbin, uint32 size_used )
 
1463
{
 
1464
        hbin->free_off  += size_used;
 
1465
        hbin->free_size -= size_used;
 
1466
 
 
1467
        if ( hbin->free_off >= hbin->block_size ) {
 
1468
                hbin->free_off = REGF_OFFSET_NONE;
 
1469
        }
 
1470
 
 
1471
        return;
 
1472
}
 
1473
 
 
1474
/*******************************************************************
 
1475
*******************************************************************/
 
1476
 
 
1477
static REGF_HBIN* find_free_space( REGF_FILE *file, uint32 size )
 
1478
{
 
1479
        REGF_HBIN *hbin, *p_hbin;
 
1480
        uint32 block_off;
 
1481
        bool cached;
 
1482
 
 
1483
        /* check open block list */
 
1484
 
 
1485
        for ( hbin=file->block_list; hbin!=NULL; hbin=hbin->next ) {
 
1486
                /* only check blocks that actually have available space */
 
1487
 
 
1488
                if ( hbin->free_off == REGF_OFFSET_NONE )
 
1489
                        continue;
 
1490
 
 
1491
                /* check for a large enough available chunk */
 
1492
 
 
1493
                if ( (hbin->block_size - hbin->free_off) >= size ) {
 
1494
                        DLIST_PROMOTE( file->block_list, hbin );
 
1495
                        goto done;                      
 
1496
                }
 
1497
        }
 
1498
 
 
1499
        /* parse the file until we find a block with 
 
1500
           enough free space; save the last non-filled hbin */
 
1501
 
 
1502
        block_off = REGF_BLOCKSIZE;
 
1503
        do {
 
1504
                /* cleanup before the next round */
 
1505
                cached = False;
 
1506
                if ( hbin )
 
1507
                        prs_mem_free( &hbin->ps );
 
1508
 
 
1509
                hbin = read_hbin_block( file, block_off );
 
1510
 
 
1511
                if ( hbin ) {
 
1512
 
 
1513
                        /* make sure that we don't already have this block in memory */
 
1514
 
 
1515
                        for ( p_hbin=file->block_list; p_hbin!=NULL; p_hbin=p_hbin->next ) {
 
1516
                                if ( p_hbin->file_off == hbin->file_off ) {
 
1517
                                        cached = True;  
 
1518
                                        break;
 
1519
                                }
 
1520
                        }
 
1521
 
 
1522
                        block_off = hbin->file_off + hbin->block_size;
 
1523
 
 
1524
                        if ( cached ) {
 
1525
                                prs_mem_free( &hbin->ps );
 
1526
                                hbin = NULL;
 
1527
                                continue;
 
1528
                        }
 
1529
                }
 
1530
        /* if (cached block or (new block and not enough free space)) then continue looping */
 
1531
        } while ( cached || (hbin && (hbin->free_size < size)) );
 
1532
        
 
1533
        /* no free space; allocate a new one */
 
1534
 
 
1535
        if ( !hbin ) {
 
1536
                uint32 alloc_size;
 
1537
 
 
1538
                /* allocate in multiples of REGF_ALLOC_BLOCK; make sure (size + hbin_header) fits */
 
1539
 
 
1540
                alloc_size = (((size+HBIN_HEADER_REC_SIZE) / REGF_ALLOC_BLOCK ) + 1 ) * REGF_ALLOC_BLOCK;
 
1541
 
 
1542
                if ( !(hbin = regf_hbin_allocate( file, alloc_size )) ) {
 
1543
                        DEBUG(0,("find_free_space: regf_hbin_allocate() failed!\n"));
 
1544
                        return NULL;
 
1545
                }
 
1546
                DLIST_ADD( file->block_list, hbin );
 
1547
        }
 
1548
 
 
1549
done:
 
1550
        /* set the offset to be ready to write */
 
1551
 
 
1552
        if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32) ) )
 
1553
                return NULL;
 
1554
 
 
1555
        /* write the record size as a placeholder for now, it should be
 
1556
           probably updated by the caller once it all of the data necessary 
 
1557
           for the record */
 
1558
 
 
1559
        if ( !prs_uint32("allocated_size", &hbin->ps, 0, &size) )
 
1560
                return False;
 
1561
 
 
1562
        update_free_space( hbin, size );
 
1563
        
 
1564
        return hbin;
 
1565
}
 
1566
 
 
1567
/*******************************************************************
 
1568
*******************************************************************/
 
1569
 
 
1570
static uint32 sk_record_data_size( SEC_DESC * sd )
 
1571
{
 
1572
        uint32 size, size_mod8;
 
1573
 
 
1574
        size_mod8 = 0;
 
1575
 
 
1576
        /* the record size is sizeof(hdr) + name + static members + data_size_field */
 
1577
 
 
1578
        size = sizeof(uint32)*5 + ndr_size_security_descriptor(sd, NULL, 0) + sizeof(uint32);
 
1579
 
 
1580
        /* multiple of 8 */
 
1581
        size_mod8 = size & 0xfffffff8;
 
1582
        if ( size_mod8 < size )
 
1583
                size_mod8 += 8;
 
1584
 
 
1585
        return size_mod8;
 
1586
}
 
1587
 
 
1588
/*******************************************************************
 
1589
*******************************************************************/
 
1590
 
 
1591
static uint32 vk_record_data_size( REGF_VK_REC *vk )
 
1592
{
 
1593
        uint32 size, size_mod8;
 
1594
 
 
1595
        size_mod8 = 0;
 
1596
 
 
1597
        /* the record size is sizeof(hdr) + name + static members + data_size_field */
 
1598
 
 
1599
        size = REC_HDR_SIZE + (sizeof(uint16)*3) + (sizeof(uint32)*3) + sizeof(uint32);
 
1600
 
 
1601
        if ( vk->valuename )
 
1602
                size += strlen(vk->valuename);
 
1603
 
 
1604
        /* multiple of 8 */
 
1605
        size_mod8 = size & 0xfffffff8;
 
1606
        if ( size_mod8 < size )
 
1607
                size_mod8 += 8;
 
1608
 
 
1609
        return size_mod8;
 
1610
}
 
1611
 
 
1612
/*******************************************************************
 
1613
*******************************************************************/
 
1614
 
 
1615
static uint32 lf_record_data_size( uint32 num_keys )
 
1616
{
 
1617
        uint32 size, size_mod8;
 
1618
 
 
1619
        size_mod8 = 0;
 
1620
 
 
1621
        /* the record size is sizeof(hdr) + num_keys + sizeof of hash_array + data_size_uint32 */
 
1622
 
 
1623
        size = REC_HDR_SIZE + sizeof(uint16) + (sizeof(REGF_HASH_REC) * num_keys) + sizeof(uint32);
 
1624
 
 
1625
        /* multiple of 8 */
 
1626
        size_mod8 = size & 0xfffffff8;
 
1627
        if ( size_mod8 < size )
 
1628
                size_mod8 += 8;
 
1629
 
 
1630
        return size_mod8;
 
1631
}
 
1632
 
 
1633
/*******************************************************************
 
1634
*******************************************************************/
 
1635
 
 
1636
static uint32 nk_record_data_size( REGF_NK_REC *nk )
 
1637
{
 
1638
        uint32 size, size_mod8;
 
1639
 
 
1640
        size_mod8 = 0;
 
1641
 
 
1642
        /* the record size is static + length_of_keyname + length_of_classname + data_size_uint32 */
 
1643
 
 
1644
        size = 0x4c + strlen(nk->keyname) + sizeof(uint32);
 
1645
 
 
1646
        if ( nk->classname )
 
1647
                size += strlen( nk->classname );
 
1648
 
 
1649
        /* multiple of 8 */
 
1650
        size_mod8 = size & 0xfffffff8;
 
1651
        if ( size_mod8 < size )
 
1652
                size_mod8 += 8;
 
1653
 
 
1654
        return size_mod8;
 
1655
}
 
1656
 
 
1657
/*******************************************************************
 
1658
*******************************************************************/
 
1659
 
 
1660
static bool create_vk_record( REGF_FILE *file, REGF_VK_REC *vk, REGISTRY_VALUE *value )
 
1661
{
 
1662
        char *name = regval_name(value);
 
1663
        REGF_HBIN *data_hbin;
 
1664
 
 
1665
        ZERO_STRUCTP( vk );
 
1666
 
 
1667
        memcpy( vk->header, "vk", REC_HDR_SIZE );
 
1668
 
 
1669
        if ( name ) {
 
1670
                vk->valuename = talloc_strdup( file->mem_ctx, regval_name(value) );
 
1671
                vk->flag = VK_FLAG_NAME_PRESENT;
 
1672
        }
 
1673
 
 
1674
        vk->data_size = regval_size( value );
 
1675
        vk->type      = regval_type( value );
 
1676
 
 
1677
        if ( vk->data_size > sizeof(uint32) ) {
 
1678
                uint32 data_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
 
1679
 
 
1680
                vk->data = (uint8 *)TALLOC_MEMDUP( file->mem_ctx,
 
1681
                                                   regval_data_p(value),
 
1682
                                                   vk->data_size );
 
1683
                if (vk->data == NULL) {
 
1684
                        return False;
 
1685
                }
 
1686
 
 
1687
                /* go ahead and store the offset....we'll pick this hbin block back up when 
 
1688
                   we stream the data */
 
1689
 
 
1690
                if ((data_hbin = find_free_space(file, data_size )) == NULL) {
 
1691
                        return False;
 
1692
                }
 
1693
                vk->data_off = prs_offset( &data_hbin->ps ) + data_hbin->first_hbin_off - HBIN_HDR_SIZE;
 
1694
        }
 
1695
        else {
 
1696
                /* make sure we don't try to copy from a NULL value pointer */
 
1697
 
 
1698
                if ( vk->data_size != 0 ) 
 
1699
                        memcpy( &vk->data_off, regval_data_p(value), sizeof(uint32) );
 
1700
                vk->data_size |= VK_DATA_IN_OFFSET;             
 
1701
        }
 
1702
 
 
1703
        return True;
 
1704
}
 
1705
 
 
1706
/*******************************************************************
 
1707
*******************************************************************/
 
1708
 
 
1709
static int hashrec_cmp( REGF_HASH_REC *h1, REGF_HASH_REC *h2 )
 
1710
{
 
1711
        return StrCaseCmp( h1->fullname, h2->fullname );
 
1712
}
 
1713
 
 
1714
/*******************************************************************
 
1715
*******************************************************************/
 
1716
 
 
1717
 REGF_NK_REC* regfio_write_key( REGF_FILE *file, const char *name, 
 
1718
                               REGVAL_CTR *values, struct regsubkey_ctr *subkeys,
 
1719
                               SEC_DESC *sec_desc, REGF_NK_REC *parent )
 
1720
{
 
1721
        REGF_NK_REC *nk;
 
1722
        REGF_HBIN *vlist_hbin = NULL;
 
1723
        uint32 size;
 
1724
 
 
1725
        if ( !(nk = TALLOC_ZERO_P( file->mem_ctx, REGF_NK_REC )) )
 
1726
                return NULL;
 
1727
 
 
1728
        memcpy( nk->header, "nk", REC_HDR_SIZE );
 
1729
 
 
1730
        if ( !parent )
 
1731
                nk->key_type = NK_TYPE_ROOTKEY;
 
1732
        else
 
1733
                nk->key_type = NK_TYPE_NORMALKEY;
 
1734
 
 
1735
        /* store the parent offset (or -1 if a the root key */
 
1736
 
 
1737
        nk->parent_off = parent ? (parent->hbin_off + parent->hbin->file_off - REGF_BLOCKSIZE - HBIN_HDR_SIZE ) : REGF_OFFSET_NONE;
 
1738
 
 
1739
        /* no classname currently */
 
1740
 
 
1741
        nk->classname_off = REGF_OFFSET_NONE;
 
1742
        nk->classname = NULL;
 
1743
        nk->keyname = talloc_strdup( file->mem_ctx, name );
 
1744
 
 
1745
        /* current modification time */
 
1746
 
 
1747
        unix_to_nt_time( &nk->mtime, time(NULL) );
 
1748
 
 
1749
        /* allocate the record on disk */
 
1750
 
 
1751
        size = nk_record_data_size( nk );
 
1752
        nk->rec_size = ( size - 1 ) ^ 0XFFFFFFFF;
 
1753
        if ((nk->hbin = find_free_space( file, size )) == NULL) {
 
1754
                return NULL;
 
1755
        }
 
1756
        nk->hbin_off = prs_offset( &nk->hbin->ps );
 
1757
 
 
1758
        /* Update the hash record in the parent */
 
1759
        
 
1760
        if ( parent ) {
 
1761
                REGF_HASH_REC *hash = &parent->subkeys.hashes[parent->subkey_index];
 
1762
 
 
1763
                hash->nk_off = prs_offset( &nk->hbin->ps ) + nk->hbin->first_hbin_off - HBIN_HDR_SIZE;
 
1764
                memcpy( hash->keycheck, name, sizeof(uint32) );
 
1765
                hash->fullname = talloc_strdup( file->mem_ctx, name );
 
1766
                parent->subkey_index++;
 
1767
 
 
1768
                /* sort the list by keyname */
 
1769
 
 
1770
                qsort( parent->subkeys.hashes, parent->subkey_index, sizeof(REGF_HASH_REC), QSORT_CAST hashrec_cmp );
 
1771
 
 
1772
                if ( !hbin_prs_lf_records( "lf_rec", parent->subkeys.hbin, 0, parent ) )
 
1773
                        return False;
 
1774
        }
 
1775
 
 
1776
        /* write the security descriptor */
 
1777
 
 
1778
        nk->sk_off = REGF_OFFSET_NONE;
 
1779
        if ( sec_desc ) {
 
1780
                uint32 sk_size = sk_record_data_size( sec_desc );
 
1781
                REGF_HBIN *sk_hbin;
 
1782
 
 
1783
                /* search for it in the existing list of sd's */
 
1784
 
 
1785
                if ( (nk->sec_desc = find_sk_record_by_sec_desc( file, sec_desc )) == NULL ) {
 
1786
                        /* not found so add it to the list */
 
1787
 
 
1788
                        if (!(sk_hbin = find_free_space( file, sk_size ))) {
 
1789
                                return NULL;
 
1790
                        }
 
1791
 
 
1792
                        if ( !(nk->sec_desc = TALLOC_ZERO_P( file->mem_ctx, REGF_SK_REC )) )
 
1793
                                return NULL;
 
1794
        
 
1795
                        /* now we have to store the security descriptor in the list and 
 
1796
                           update the offsets */
 
1797
 
 
1798
                        memcpy( nk->sec_desc->header, "sk", REC_HDR_SIZE );
 
1799
                        nk->sec_desc->hbin      = sk_hbin;
 
1800
                        nk->sec_desc->hbin_off  = prs_offset( &sk_hbin->ps );
 
1801
                        nk->sec_desc->sk_off    = prs_offset( &sk_hbin->ps ) + sk_hbin->first_hbin_off - HBIN_HDR_SIZE;
 
1802
                        nk->sec_desc->rec_size  = (sk_size-1)  ^ 0xFFFFFFFF;
 
1803
 
 
1804
                        nk->sec_desc->sec_desc  = sec_desc;
 
1805
                        nk->sec_desc->ref_count = 0;
 
1806
                        
 
1807
                        /* size value must be self-inclusive */
 
1808
                        nk->sec_desc->size      = ndr_size_security_descriptor(sec_desc, NULL, 0)
 
1809
                                + sizeof(uint32);
 
1810
 
 
1811
                        DLIST_ADD_END( file->sec_desc_list, nk->sec_desc, REGF_SK_REC *);
 
1812
 
 
1813
                        /* update the offsets for us and the previous sd in the list.
 
1814
                           if this is the first record, then just set the next and prev
 
1815
                           offsets to ourself. */
 
1816
 
 
1817
                        if ( nk->sec_desc->prev ) {
 
1818
                                REGF_SK_REC *prev = nk->sec_desc->prev;
 
1819
 
 
1820
                                nk->sec_desc->prev_sk_off = prev->hbin_off + prev->hbin->first_hbin_off - HBIN_HDR_SIZE;
 
1821
                                prev->next_sk_off = nk->sec_desc->sk_off;
 
1822
 
 
1823
                                /* the end must loop around to the front */
 
1824
                                nk->sec_desc->next_sk_off = file->sec_desc_list->sk_off;
 
1825
 
 
1826
                                /* and first must loop around to the tail */
 
1827
                                file->sec_desc_list->prev_sk_off = nk->sec_desc->sk_off;
 
1828
                        } else {
 
1829
                                nk->sec_desc->prev_sk_off = nk->sec_desc->sk_off;
 
1830
                                nk->sec_desc->next_sk_off = nk->sec_desc->sk_off;
 
1831
                        }
 
1832
                }
 
1833
 
 
1834
                /* bump the reference count +1 */
 
1835
 
 
1836
                nk->sk_off = nk->sec_desc->sk_off;
 
1837
                nk->sec_desc->ref_count++;
 
1838
        }
 
1839
 
 
1840
        /* write the subkeys */
 
1841
 
 
1842
        nk->subkeys_off = REGF_OFFSET_NONE;
 
1843
        if ( (nk->num_subkeys = regsubkey_ctr_numkeys( subkeys )) != 0 ) {
 
1844
                uint32 lf_size = lf_record_data_size( nk->num_subkeys );
 
1845
                uint32 namelen;
 
1846
                int i;
 
1847
                
 
1848
                if (!(nk->subkeys.hbin = find_free_space( file, lf_size ))) {
 
1849
                        return NULL;
 
1850
                }
 
1851
                nk->subkeys.hbin_off = prs_offset( &nk->subkeys.hbin->ps );
 
1852
                nk->subkeys.rec_size = (lf_size-1) ^ 0xFFFFFFFF;
 
1853
                nk->subkeys_off = prs_offset( &nk->subkeys.hbin->ps ) + nk->subkeys.hbin->first_hbin_off - HBIN_HDR_SIZE;
 
1854
 
 
1855
                memcpy( nk->subkeys.header, "lf", REC_HDR_SIZE );
 
1856
                
 
1857
                nk->subkeys.num_keys = nk->num_subkeys;
 
1858
                if (nk->subkeys.num_keys) {
 
1859
                        if ( !(nk->subkeys.hashes = TALLOC_ZERO_ARRAY( file->mem_ctx, REGF_HASH_REC, nk->subkeys.num_keys )) )
 
1860
                                return NULL;
 
1861
                } else {
 
1862
                        nk->subkeys.hashes = NULL;
 
1863
                }
 
1864
                nk->subkey_index = 0;
 
1865
 
 
1866
                /* update the max_bytes_subkey{name,classname} fields */
 
1867
                for ( i=0; i<nk->num_subkeys; i++ ) {
 
1868
                        namelen = strlen( regsubkey_ctr_specific_key(subkeys, i) );
 
1869
                        if ( namelen*2 > nk->max_bytes_subkeyname )
 
1870
                                nk->max_bytes_subkeyname = namelen * 2;
 
1871
                }
 
1872
        }
 
1873
 
 
1874
        /* write the values */
 
1875
 
 
1876
        nk->values_off = REGF_OFFSET_NONE;
 
1877
        if ( (nk->num_values = regval_ctr_numvals( values )) != 0 ) {
 
1878
                uint32 vlist_size = ( ( nk->num_values * sizeof(uint32) ) & 0xfffffff8 ) + 8;
 
1879
                int i;
 
1880
                
 
1881
                if (!(vlist_hbin = find_free_space( file, vlist_size ))) {
 
1882
                        return NULL;
 
1883
                }
 
1884
                nk->values_off = prs_offset( &vlist_hbin->ps ) + vlist_hbin->first_hbin_off - HBIN_HDR_SIZE;
 
1885
        
 
1886
                if (nk->num_values) {
 
1887
                        if ( !(nk->values = TALLOC_ARRAY( file->mem_ctx, REGF_VK_REC, nk->num_values )) )
 
1888
                                return NULL;
 
1889
                } else {
 
1890
                        nk->values = NULL;
 
1891
                }
 
1892
 
 
1893
                /* create the vk records */
 
1894
 
 
1895
                for ( i=0; i<nk->num_values; i++ ) {
 
1896
                        uint32 vk_size, namelen, datalen;
 
1897
                        REGISTRY_VALUE *r;
 
1898
 
 
1899
                        r = regval_ctr_specific_value( values, i );
 
1900
                        create_vk_record( file, &nk->values[i], r );
 
1901
                        vk_size = vk_record_data_size( &nk->values[i] );
 
1902
                        nk->values[i].hbin = find_free_space( file, vk_size );
 
1903
                        nk->values[i].hbin_off = prs_offset( &nk->values[i].hbin->ps );
 
1904
                        nk->values[i].rec_size = ( vk_size - 1 ) ^ 0xFFFFFFFF;
 
1905
                        nk->values[i].rec_off = prs_offset( &nk->values[i].hbin->ps ) 
 
1906
                                + nk->values[i].hbin->first_hbin_off 
 
1907
                                - HBIN_HDR_SIZE;
 
1908
 
 
1909
                        /* update the max bytes fields if necessary */
 
1910
 
 
1911
                        namelen = strlen( regval_name(r) );
 
1912
                        if ( namelen*2 > nk->max_bytes_valuename )
 
1913
                                nk->max_bytes_valuename = namelen * 2;
 
1914
 
 
1915
                        datalen = regval_size( r );
 
1916
                        if ( datalen > nk->max_bytes_value )
 
1917
                                nk->max_bytes_value = datalen;
 
1918
                }
 
1919
        }
 
1920
 
 
1921
        /* stream the records */        
 
1922
        
 
1923
        prs_set_offset( &nk->hbin->ps, nk->hbin_off );
 
1924
        if ( !prs_nk_rec( "nk_rec", &nk->hbin->ps, 0, nk ) )
 
1925
                return False;
 
1926
 
 
1927
        if ( nk->num_values ) {
 
1928
                if ( !hbin_prs_vk_records( "vk_records", vlist_hbin, 0, nk, file ) )
 
1929
                        return False;
 
1930
        }
 
1931
 
 
1932
 
 
1933
        regfio_flush( file );
 
1934
 
 
1935
        return nk;
 
1936
}
 
1937