testdisk/src/file_als.c
2009-05-27 09:19:13 +02:00

85 lines
2.8 KiB
C

/*
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);
}