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/*
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.
*/
#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_als)
#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"
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_als(file_stat_t *file_stat);
const file_hint_t file_hint_als= {
.extension="als",
.description="Ableton Live Sets",
.max_filesize=100*1024*1024,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_als
};
/*@
@ requires file_recovery->file_check == &file_check_als;
@ requires \separated(file_recovery, file_recovery->handle, file_recovery->extension, &errno, &Frama_C_entropy_source);
@ requires valid_file_check_param(file_recovery);
@ ensures valid_file_check_result(file_recovery);
@ assigns *file_recovery->handle, errno, file_recovery->file_size;
@ assigns Frama_C_entropy_source;
@*/
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);
}
/*@
@ requires buffer_size >= 11+13;
@ requires separation: \separated(&file_hint_als, buffer+(..), file_recovery, file_recovery_new);
@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures valid_header_check_result(\result, file_recovery_new);
@ assigns *file_recovery_new;
@*/
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 const unsigned char als_header2[13]= {
0x0c, 'L', 'i', 'v', 'e', 'D', 'o', 'c',
'u', 'm', 'e', 'n', 't'
};
if(memcmp(buffer+11,als_header2,sizeof(als_header2))!=0)
return 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;
}
/* 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 void register_header_check_als(file_stat_t *file_stat)
{
static const unsigned char als_header[5]= {
0xab, 0x1e, 'V', 'x', 0x03
};
register_header_check(0, als_header,sizeof(als_header), &header_check_als, file_stat);
}
#endif
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