summaryrefslogtreecommitdiffstats
path: root/src/file_als.c
blob: c83c3dfae9566256dea3fb084034798f56fb618f (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
/*

    File: file_als.c

    Copyright (C) 2008 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
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include "types.h"
#include "filegen.h"

static void register_header_check_als(file_stat_t *file_stat);
static int header_check_als(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new);
static void file_check_als(file_recovery_t *file_recovery);

const file_hint_t file_hint_als= {
  .extension="als",
  .description="Ableton Live Sets",
  .min_header_distance=0,
  .max_filesize=100*1024*1024,
  .recover=1,
  .enable_by_default=1,
  .register_header_check=&register_header_check_als
};

/* Header
 * 0000  ab 1e 56 78 03 XX 00 00  00 00 XX 0c 4c 69 76 65  |  Vx        Live|
 * 0010  44 6f 63 75 6d 65 6e 74  XX 00 00 00 00 XX XX XX  |Document        |
 */
static const unsigned char als_header[5]= {
  0xab, 0x1e,  'V',  'x', 0x03
};
static const unsigned char als_header2[13]= {
  0x0c, 'L', 'i', 'v', 'e', 'D',  'o',  'c',
   'u', 'm', 'e', 'n', 't'
};

static void register_header_check_als(file_stat_t *file_stat)
{
  register_header_check(0, als_header,sizeof(als_header), &header_check_als, file_stat);
}

static int header_check_als(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
{
  if(memcmp(buffer,als_header,sizeof(als_header))==0 &&
      memcmp(buffer+11,als_header2,sizeof(als_header2))==0)
  {
    reset_file_recovery(file_recovery_new);
    file_recovery_new->extension=file_hint_als.extension;
    file_recovery_new->file_check=file_check_als;
    return 1;
  }
  return 0;
}

static void file_check_als(file_recovery_t *file_recovery)
{
  static const unsigned char als_footer[0x16]= {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x80, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00,
    0x80, 0x00, 0x00, 0x00, 0x80, 0x01
  };
  file_search_footer(file_recovery, als_footer, sizeof(als_footer), 7);
}