summaryrefslogtreecommitdiffstats
path: root/src/analyse.c
blob: b121986c927fd4ad8556d5bfdfaa5ae80fd0ac2d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
/*

    File: analyse.c

    Copyright (C) 1998-2015 Christophe GRENIER <grenier@cgsecurity.org>
  
    This software is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
  
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
  
    You should have received a copy of the GNU General Public License along
    with this program; if not, write the Free Software Foundation, Inc., 51
    Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include "types.h"
#include "common.h"
#include "analyse.h"
#include "bfs.h"
#include "bsd.h"
#include "btrfs.h"
#include "cramfs.h"
#include "exfat.h"
#include "ext2.h"
#include "fat.h"
#include "fatx.h"
#include "f2fs_fs.h"
#include "f2fs.h"
#include "gfs2.h"
#include "hfs.h"
#include "hfsp.h"
#include "jfs_superblock.h"
#include "jfs.h"
#include "hpfs.h"
#include "luks.h"
#include "lvm.h"
#include "md.h"
#include "netware.h"
#include "ntfs.h"
#include "refs.h"
#include "rfs.h"
#include "sun.h"
#include "swap.h"
#include "sysv.h"
#include "ufs.h"
#include "vmfs.h"
#include "wbfs.h"
#include "xfs.h"
#include "zfs.h"
#include "log.h"
#include "parti386.h"

int search_NTFS_backup(unsigned char *buffer, disk_t *disk, partition_t *partition, const int verbose, const int dump_ind)
{
  if(disk->pread(disk, buffer, DEFAULT_SECTOR_SIZE, partition->part_offset) != DEFAULT_SECTOR_SIZE)
      return -1;
  {
    const struct ntfs_boot_sector *ntfs_header=(const struct ntfs_boot_sector*)buffer;
    /* NTFS recovery using backup sector */
    if(le16(ntfs_header->marker)==0xAA55 &&
	recover_NTFS(disk, ntfs_header, partition, verbose, dump_ind, 1)==0)
      return 1;
  }
  return 0;
}

int search_HFS_backup(unsigned char *buffer, disk_t *disk, partition_t *partition, const int verbose, const int dump_ind)
{
  if(disk->pread(disk, buffer, 0x400, partition->part_offset)!= 0x400)
    return -1;
  {
    const hfs_mdb_t *hfs_mdb=(const hfs_mdb_t *)buffer;
    const struct hfsp_vh *vh=(const struct hfsp_vh *)buffer;
    /* HFS recovery using backup sector */
    if(hfs_mdb->drSigWord==be16(HFS_SUPER_MAGIC) &&
	recover_HFS(disk, hfs_mdb, partition, verbose, dump_ind, 1)==0)
    {
      strncpy(partition->info,"HFS found using backup sector!",sizeof(partition->info));
      return 1;
    }
    if((be16(vh->version)==4 || be16(vh->version)==5) &&
	recover_HFSP(disk, vh, partition, verbose, dump_ind, 1)==0)
    {
      strncpy(partition->info,"HFS+ found using backup sector!",sizeof(partition->info));
      return 1;
    }
  }
  return 0;
}

int search_exFAT_backup(unsigned char *buffer, disk_t *disk, partition_t *partition)
{
  if(disk->pread(disk, buffer, DEFAULT_SECTOR_SIZE, partition->part_offset) != DEFAULT_SECTOR_SIZE)
    return -1;
  {
    const struct exfat_super_block *exfat_header=(const struct exfat_super_block *)buffer;
    /* EXFAT recovery using backup sector */
    if(le16(exfat_header->signature)==0xAA55 &&
	recover_exFAT(disk, exfat_header, partition)==0)
    {
      /* part_offset has already been updated if found using backup sector */
      return 1;
    }
  }
  return 0;
}

int search_FAT_backup(unsigned char *buffer, disk_t *disk, partition_t *partition, const int verbose, const int dump_ind)
{
  if(disk->pread(disk, buffer, DEFAULT_SECTOR_SIZE, partition->part_offset)!=DEFAULT_SECTOR_SIZE)
    return -1;
  {
    const struct fat_boot_sector *fat_header=(const struct fat_boot_sector *)buffer;
    /* FAT32 recovery using backup sector */
    if(le16(fat_header->marker)==0xAA55 &&
	recover_FAT(disk, fat_header, partition, verbose, dump_ind, 1)==0)
      return 1;
  }
  return 0;
}

int search_type_0(const unsigned char *buffer, disk_t *disk, partition_t *partition, const int verbose, const int dump_ind)
{
  /* Expect a buffer filled with 8k to handle the SWAP detection */
  const pv_disk_t *pv=(const pv_disk_t *)buffer;
  const struct cramfs_super *cramfs=(const struct cramfs_super *)buffer;
  const struct disk_fatx *fatx_block=(const struct disk_fatx*)buffer;
  const struct disk_netware *netware_block=(const struct disk_netware *)buffer;
  const struct exfat_super_block *exfat_header=(const struct exfat_super_block *)buffer;
  const struct fat_boot_sector *fat_header=(const struct fat_boot_sector *)buffer;
  const struct luks_phdr *luks=(const struct luks_phdr *)buffer;
  const struct mdp_superblock_1 *sb1=(const struct mdp_superblock_1 *)buffer;
  const struct ntfs_boot_sector *ntfs_header=(const struct ntfs_boot_sector*)buffer;
  const struct wbfs_head *wbfs=(const struct wbfs_head *)buffer;
  const struct xfs_sb *xfs=(const struct xfs_sb *)buffer;
  const union swap_header *swap_header=(const union swap_header *)buffer;
  const struct ReFS_boot_sector *refs_header=(const struct ReFS_boot_sector *)buffer;
  static const uint8_t LUKS_MAGIC[LUKS_MAGIC_L] = {'L','U','K','S', 0xba, 0xbe};
//  assert(sizeof(union swap_header)<=8*DEFAULT_SECTOR_SIZE);
//  assert(sizeof(pv_disk_t)<=8*DEFAULT_SECTOR_SIZE);
//  assert(sizeof(struct fat_boot_sector)<=8*DEFAULT_SECTOR_SIZE);
//  assert(sizeof(struct ntfs_boot_sector)<=8*DEFAULT_SECTOR_SIZE);
//  assert(sizeof(struct disk_netware)<=8*DEFAULT_SECTOR_SIZE);
//  assert(sizeof(struct xfs_sb)<=8*DEFAULT_SECTOR_SIZE);
//  assert(sizeof(struct disk_fatx)<=8*DEFAULT_SECTOR_SIZE);
  if(verbose>2)
  {
    log_trace("search_type_0 lba=%lu\n",
	(long unsigned)(partition->part_offset/disk->sector_size));
  }
  if((memcmp(swap_header->magic.magic, "SWAP", 4)==0 ||
	memcmp(swap_header->magic8k.magic, "SWAP", 4)==0) &&
      recover_Linux_SWAP(swap_header, partition)==0)
    return 1;
  if(memcmp((const char *)pv->id,LVM_ID,sizeof(pv->id)) == 0 &&
      recover_LVM(disk, pv, partition, verbose, dump_ind)==0)
    return 1;
  if(le16(fat_header->marker)==0xAA55 &&
      recover_FAT(disk, fat_header, partition, verbose, dump_ind, 0)==0)
    return 1;
  if(le16(exfat_header->signature)==0xAA55 &&
      recover_exFAT(disk, exfat_header, partition)==0)
    return 1;
  if(le16(fat_header->marker)==0xAA55 &&
      recover_HPFS(disk, fat_header, partition, verbose)==0)
    return 1;
  if(le16(fat_header->marker)==0xAA55 &&
      recover_OS2MB(disk, fat_header, partition, verbose, dump_ind)==0)
    return 1;
  if(le16(ntfs_header->marker)==0xAA55 &&
      recover_NTFS(disk, ntfs_header, partition, verbose, dump_ind, 0)==0)
    return 1;
  if(memcmp(netware_block->magic, "Nw_PaRtItIoN", 12)==0 &&
      recover_netware(disk, netware_block, partition)==0)
    return 1;
  if (xfs->sb_magicnum==be32(XFS_SB_MAGIC) &&
      recover_xfs(disk, xfs, partition, verbose, dump_ind)==0)
    return 1;
  if(memcmp(fatx_block->magic,"FATX",4)==0 &&
      recover_FATX(fatx_block, partition)==0)
    return 1;
  if(memcmp(luks->magic,LUKS_MAGIC,LUKS_MAGIC_L)==0 &&
      recover_LUKS(disk, luks, partition, verbose, dump_ind)==0)
    return 1;
  if(refs_header->fsname==be32(0x52654653) &&
      recover_ReFS(disk, refs_header, partition)==0)
    return 1;
  /* MD 1.1 */
  if(le32(sb1->major_version)==1 &&
      recover_MD(disk, (const struct mdp_superblock_s*)buffer, partition, verbose, dump_ind)==0)
  {
    partition->part_offset-=le64(sb1->super_offset)*512;
    return 1;
  }
  if(memcmp(&wbfs->magic,"WBFS",4)==0 &&
      recover_WBFS(disk, wbfs, partition, verbose, dump_ind)==0)
    return 1;
  if(cramfs->magic==le32(CRAMFS_MAGIC) &&
      recover_cramfs(disk, cramfs, partition, verbose, dump_ind)==0)
    return 1;
  /* Try to locate logical partition that may host truecrypt encrypted filesystem */
  if(buffer[0x1fe]==0x55 && buffer[0x1ff]==0xAA &&
    recover_i386_logical(disk, buffer, partition)==0 &&
    partition->upart_type==UP_UNK)
      return 1;
  return 0;
}

int search_type_1(const unsigned char *buffer, disk_t *disk, partition_t *partition, const int verbose, const int dump_ind)
{
  const struct disklabel *bsd_header=(const struct disklabel *)(buffer+0x200);
  const struct disk_super_block *beos_block=(const struct disk_super_block*)(buffer+0x200);
  const struct cramfs_super *cramfs=(const struct cramfs_super *)(buffer+0x200);
  const struct lvm2_label_header *lvm2=(const struct lvm2_label_header *)(buffer+0x200);
  const struct sysv4_super_block *sysv4=(const struct sysv4_super_block *)(buffer+0x200);
  const sun_partition_i386 *sunlabel=(const sun_partition_i386*)(buffer+0x200);
//  assert(sizeof(struct disklabel)<=2*0x200);
//  assert(sizeof(struct disk_super_block)<=0x200);
//  assert(sizeof(struct cramfs_super)<=2*0x200);
//  assert(sizeof(struct sysv4_super_block)<=2*0x200);
//  assert(sizeof(sun_partition_i386)<=2*0x200);
  if(verbose>2)
  {
    log_trace("search_type_1 lba=%lu\n",
	(long unsigned)(partition->part_offset/disk->sector_size));
  }
  if(le32(bsd_header->d_magic) == DISKMAGIC && le32(bsd_header->d_magic2)==DISKMAGIC &&
	recover_BSD(disk, bsd_header, partition, verbose, dump_ind)==0)
    return 1;
  if(beos_block->magic1==le32(SUPER_BLOCK_MAGIC1) &&
      recover_BeFS(disk, beos_block, partition, dump_ind)==0)
    return 1;
  if(cramfs->magic==le32(CRAMFS_MAGIC) &&
    recover_cramfs(disk, cramfs, partition, verbose, dump_ind)==0)
    return 1;
  if((sysv4->s_magic == (signed)le32(0xfd187e20) || sysv4->s_magic == (signed)be32(0xfd187e20)) &&
      recover_sysv(disk, sysv4, partition, verbose, dump_ind)==0)
    return 1;
  if(memcmp((const char *)lvm2->type, LVM2_LABEL, sizeof(lvm2->type)) == 0 &&
      recover_LVM2(disk, (buffer+0x200), partition, verbose, dump_ind)==0)
    return 1;
  if(le32(sunlabel->magic_start) == SUN_LABEL_MAGIC_START &&
      recover_sun_i386(disk, sunlabel, partition, verbose, dump_ind)==0)
    return 1;
  return 0;
}

int search_type_2(const unsigned char *buffer, disk_t *disk, partition_t *partition, const int verbose, const int dump_ind)
{
  const hfs_mdb_t *hfs_mdb=(const hfs_mdb_t *)(buffer+0x400);
  const struct hfsp_vh *vh=(const struct hfsp_vh *)(buffer+0x400);
  const struct ext2_super_block *sb=(const struct ext2_super_block*)(buffer+0x400);
  const struct f2fs_super_block *sb_f2fs=(const struct f2fs_super_block *)(buffer+0x400);
//  assert(sizeof(struct ext2_super_block)<=1024);
//  assert(sizeof(hfs_mdb_t)<=1024);
//  assert(sizeof(struct hfsp_vh)<=1024);
//  assert(sizeof(struct f2fs_super_block)==3072);
  if(verbose>2)
  {
    log_trace("search_type_2 lba=%lu\n",
	(long unsigned)(partition->part_offset/disk->sector_size));
  }
  if(le16(sb->s_magic)==EXT2_SUPER_MAGIC &&
      recover_EXT2(disk, sb, partition, verbose, dump_ind)==0)
    return 1;
  if(hfs_mdb->drSigWord==be16(HFS_SUPER_MAGIC) &&
      recover_HFS(disk, hfs_mdb, partition, verbose, dump_ind, 0)==0)
    return 1;
  if((be16(vh->version)==4 || be16(vh->version)==5) &&
      recover_HFSP(disk, vh, partition, verbose, dump_ind, 0)==0)
    return 1;
  if(sb_f2fs->magic == le32(F2FS_SUPER_MAGIC) &&
      recover_f2fs(disk, sb_f2fs, partition)==0)
    return 1;
  return 0;
}

int search_type_8(unsigned char *buffer, disk_t *disk,partition_t *partition,const int verbose, const int dump_ind)
{
  if(verbose>2)
  {
    log_trace("search_type_8 lba=%lu\n",
	(long unsigned)(partition->part_offset/disk->sector_size));
  }
  if(disk->pread(disk, buffer, 4096, partition->part_offset + 4096) != 4096)
    return -1;
  { /* MD 1.2 */
    const struct mdp_superblock_1 *sb1=(const struct mdp_superblock_1 *)buffer;
    if(le32(sb1->major_version)==1 &&
        recover_MD(disk, (const struct mdp_superblock_s*)buffer, partition, verbose, dump_ind)==0)
    {
      partition->part_offset-=(uint64_t)le64(sb1->super_offset)*512-4096;
      return 1;
    }
  }
  return 0;
}

int search_type_16(unsigned char *buffer, disk_t *disk,partition_t *partition,const int verbose, const int dump_ind)
{
  if(verbose>2)
  {
    log_trace("search_type_16 lba=%lu\n",
	(long unsigned)(partition->part_offset/disk->sector_size));
  }
  /* 8k offset */
  if(disk->pread(disk, buffer, 3 * DEFAULT_SECTOR_SIZE, partition->part_offset + 16 * 512) != 3 * DEFAULT_SECTOR_SIZE)
    return -1;
  {
    const struct ufs_super_block *ufs=(const struct ufs_super_block *)buffer;
    const struct vdev_boot_header *zfs=(const struct vdev_boot_header*)buffer;
    /* Test UFS */
    if((le32(ufs->fs_magic)==UFS_MAGIC || be32(ufs->fs_magic)==UFS_MAGIC ||
	  le32(ufs->fs_magic)==UFS2_MAGIC || be32(ufs->fs_magic)==UFS2_MAGIC) &&
	recover_ufs(disk, ufs, partition, verbose, dump_ind)==0)
      return 1;
    if(le64(zfs->vb_magic)==VDEV_BOOT_MAGIC &&
	recover_ZFS(disk, zfs, partition, verbose, dump_ind)==0)
      return 1;
  }
  return 0;
}

int search_type_64(unsigned char *buffer, disk_t *disk,partition_t *partition,const int verbose, const int dump_ind)
{
  if(verbose>2)
  {
    log_trace("search_type_64 lba=%lu\n",
	(long unsigned)(partition->part_offset/disk->sector_size));
  }
  /* 32k offset */
  if(disk->pread(disk, buffer, 3 * DEFAULT_SECTOR_SIZE, partition->part_offset + 63 * 512) != 3 * DEFAULT_SECTOR_SIZE)
    return -1;
  {
    const struct jfs_superblock* jfs=(const struct jfs_superblock*)(buffer+0x200);
    /* Test JFS */
    if(memcmp(jfs->s_magic,"JFS1",4)==0 &&
	recover_JFS(disk, jfs, partition, verbose, dump_ind)==0)
      return 1;
  }
  return 0;
}

int search_type_128(unsigned char *buffer, disk_t *disk, partition_t *partition, const int verbose, const int dump_ind)
{
  if(verbose>2)
  {
    log_trace("search_type_128 lba=%lu\n",
	(long unsigned)(partition->part_offset/disk->sector_size));
  }
  if(disk->pread(disk, buffer, 11 * DEFAULT_SECTOR_SIZE, partition->part_offset + 126 * 512) != 11 * DEFAULT_SECTOR_SIZE)
    return -1;
  {
    const unsigned char *buffer_1024=buffer+0x400;
    const struct reiserfs_super_block *rfs=(const struct reiserfs_super_block *)buffer_1024;
    const struct reiser4_master_sb *rfs4=(const struct reiser4_master_sb *)buffer_1024;
    const struct ufs_super_block *ufs=(const struct ufs_super_block *)buffer_1024;
    const struct btrfs_super_block *btrfs=(const struct btrfs_super_block*)buffer_1024;
    const struct gfs2_sb *gfs2=(const struct gfs2_sb *)buffer_1024;
    /* 64k offset */
    /* Test ReiserFS */
    if((memcmp(rfs->s_magic,"ReIs",4) == 0 ||
	  memcmp(rfs4->magic,REISERFS4_SUPER_MAGIC,sizeof(REISERFS4_SUPER_MAGIC)) == 0) &&
	recover_rfs(disk, rfs, partition, verbose, dump_ind)==0)
      return 1;
    /* Test UFS2 */
    if((le32(ufs->fs_magic)==UFS_MAGIC || be32(ufs->fs_magic)==UFS_MAGIC ||
	  le32(ufs->fs_magic)==UFS2_MAGIC || be32(ufs->fs_magic)==UFS2_MAGIC) &&
	recover_ufs(disk, ufs, partition, verbose, dump_ind)==0)
      return 1;
    if(memcmp(&btrfs->magic, BTRFS_MAGIC, 8)==0 &&
      recover_btrfs(disk, btrfs, partition, verbose, dump_ind)==0)
      return 1;
    if(gfs2->sb_header.mh_magic==be32(GFS2_MAGIC) &&
	recover_gfs2(disk, gfs2, partition, dump_ind)==0)
      return 1;
  }
  return 0;
}

int search_type_2048(unsigned char *buffer, disk_t *disk, partition_t *partition, const int verbose, const int dump_ind)
{
  if(verbose>2)
  {
    log_trace("search_type_2048 lba=%lu\n",
	(long unsigned)(partition->part_offset/disk->sector_size));
  }
  if(disk->pread(disk, buffer, 2*DEFAULT_SECTOR_SIZE, partition->part_offset + 2048 * 512) != 2*DEFAULT_SECTOR_SIZE)
    return -1;
  {
    const struct vmfs_volume *sb_vmfs=(const struct vmfs_volume *)buffer;
    if(le32(sb_vmfs->magic)==0xc001d00d &&
      recover_VMFS(disk, sb_vmfs, partition, verbose, dump_ind)==0)
      return 1;
  }
  return 0;
}

int check_linux(disk_t *disk, partition_t *partition, const int verbose)
{
  if(check_JFS(disk, partition)==0 ||
      check_rfs(disk, partition, verbose)==0 ||
      check_EXT2(disk, partition, verbose)==0 ||
      check_cramfs(disk, partition, verbose)==0 ||
      check_xfs(disk, partition, verbose)==0 ||
      check_LUKS(disk, partition)==0 ||
      check_btrfs(disk, partition)==0 ||
      check_f2fs(disk, partition)==0 ||
      check_gfs2(disk, partition)==0 ||
      check_ZFS(disk, partition)==0)
    return 0;
  return 1;
}