1 /*
2
3 File: file_bz2.c
4
5 Copyright (C) 1998-2005,2007 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_bz2(file_stat_t *file_stat);
34 static int header_check_bz2(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_bz2= {
37 .extension="bz2",
38 .description="bzip2 compressed data",
39 .max_filesize=PHOTOREC_MAX_FILE_SIZE,
40 .recover=1,
41 .enable_by_default=1,
42 .register_header_check=®ister_header_check_bz2
43 };
44
45 static const unsigned char bz2_header[3]= {'B','Z','h'};
46
register_header_check_bz2(file_stat_t * file_stat)47 static void register_header_check_bz2(file_stat_t *file_stat)
48 {
49 register_header_check(0, bz2_header,sizeof(bz2_header), &header_check_bz2, file_stat);
50 }
51
header_check_bz2(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)52 static int header_check_bz2(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)
53 {
54 if(buffer[0]=='B' && buffer[1]=='Z' && buffer[2]=='h' && buffer[3]>='0' && buffer[4]=='1' && buffer[5]=='A' && buffer[6]=='Y' && buffer[7]=='&' && buffer[8]=='S' && buffer[9]=='Y')
55 {
56 reset_file_recovery(file_recovery_new);
57 file_recovery_new->extension=file_hint_bz2.extension;
58 return 1;
59 }
60 return 0;
61 }
62