1 /*
2
3 File: file_als.c
4
5 Copyright (C) 2008 Christophe GRENIER <grenier@cgsecurity.org>
6
7 This software is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License along
18 with this program; if not, write the Free Software Foundation, Inc., 51
19 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20
21 */
22
23 #ifdef HAVE_CONFIG_H
24 #include <config.h>
25 #endif
26 #ifdef HAVE_STRING_H
27 #include <string.h>
28 #endif
29 #include <stdio.h>
30 #include "types.h"
31 #include "filegen.h"
32
33 static void register_header_check_als(file_stat_t *file_stat);
34
35 const file_hint_t file_hint_als= {
36 .extension="als",
37 .description="Ableton Live Sets",
38 .max_filesize=100*1024*1024,
39 .recover=1,
40 .enable_by_default=1,
41 .register_header_check=®ister_header_check_als
42 };
43
file_check_als(file_recovery_t * file_recovery)44 static void file_check_als(file_recovery_t *file_recovery)
45 {
46 static const unsigned char als_footer[0x16]= {
47 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
48 0x80, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00,
49 0x80, 0x00, 0x00, 0x00, 0x80, 0x01
50 };
51 file_search_footer(file_recovery, als_footer, sizeof(als_footer), 7);
52 }
53
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)54 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)
55 {
56 static const unsigned char als_header2[13]= {
57 0x0c, 'L', 'i', 'v', 'e', 'D', 'o', 'c',
58 'u', 'm', 'e', 'n', 't'
59 };
60 if(memcmp(buffer+11,als_header2,sizeof(als_header2))!=0)
61 return 0;
62 reset_file_recovery(file_recovery_new);
63 file_recovery_new->extension=file_hint_als.extension;
64 file_recovery_new->file_check=&file_check_als;
65 return 1;
66 }
67
68 /* Header
69 * 0000 ab 1e 56 78 03 XX 00 00 00 00 XX 0c 4c 69 76 65 | Vx Live|
70 * 0010 44 6f 63 75 6d 65 6e 74 XX 00 00 00 00 XX XX XX |Document |
71 */
register_header_check_als(file_stat_t * file_stat)72 static void register_header_check_als(file_stat_t *file_stat)
73 {
74 static const unsigned char als_header[5]= {
75 0xab, 0x1e, 'V', 'x', 0x03
76 };
77 register_header_check(0, als_header,sizeof(als_header), &header_check_als, file_stat);
78 }
79