1 /*
2
3 File: file_myo.c
4
5 Copyright (C) 2010 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_myo(file_stat_t *file_stat);
34 static int header_check_myo(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);
35
36 const file_hint_t file_hint_myo= {
37 .extension="myo",
38 .description="Mind Your Own Business",
39 .max_filesize=PHOTOREC_MAX_FILE_SIZE,
40 .recover=1,
41 .enable_by_default=1,
42 .register_header_check=®ister_header_check_myo
43 };
44
45
header_check_myo(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)46 static int header_check_myo(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)
47 {
48 const uint64_t size=(uint64_t)buffer[0]+(((uint64_t)buffer[1])<<8)+(((uint64_t)buffer[2])<<16)+(((uint64_t)buffer[3])<<24)+1;
49 if(size < 0x9ce + 6)
50 return 0;
51 if(file_recovery->file_stat!=NULL &&
52 file_recovery->file_stat->file_hint==&file_hint_myo)
53 {
54 header_ignored(file_recovery_new);
55 return 0;
56 }
57 reset_file_recovery(file_recovery_new);
58 file_recovery_new->extension=file_hint_myo.extension;
59 file_recovery_new->calculated_file_size=size;
60 file_recovery_new->data_check=&data_check_size;
61 file_recovery_new->file_check=&file_check_size;
62 return 1;
63 }
64
65
register_header_check_myo(file_stat_t * file_stat)66 static void register_header_check_myo(file_stat_t *file_stat)
67 {
68 register_header_check(0x9ce, "FC!DEF", 6, &header_check_myo, file_stat);
69 }
70