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/*
File: file_exs.c
Copyright (C) 2011 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_exs)
#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_exs(file_stat_t *file_stat);
const file_hint_t file_hint_exs= {
.extension="exs",
.description="Apple Logic",
.max_filesize=1024*1024,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_exs
};
/*@
@ requires file_recovery->file_rename==&file_rename_exs;
@ requires valid_file_rename_param(file_recovery);
@ ensures valid_file_rename_result(file_recovery);
@*/
static void file_rename_exs(file_recovery_t *file_recovery)
{
unsigned char buffer[512];
FILE *file;
int buffer_size;
if((file=fopen(file_recovery->filename, "rb"))==NULL)
return;
buffer_size=fread(buffer, 1, sizeof(buffer), file);
fclose(file);
file_rename(file_recovery, buffer, buffer_size, 0x14, "exs", 0);
}
/*@
@ requires buffer_size >= 0x14;
@ requires separation: \separated(&file_hint_exs, 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);
@ ensures (\result == 1) ==> (file_recovery_new->file_rename == &file_rename_exs);
@ ensures (\result == 1) ==> (valid_read_string(file_recovery_new->extension));
@ assigns *file_recovery_new;
@*/
static int header_check_exs(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[0x10], "TBOS", 4)!=0)
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_exs.extension;
file_recovery_new->file_rename=&file_rename_exs;
return 1;
}
static void register_header_check_exs(file_stat_t *file_stat)
{
static const unsigned char exs_header[8]= {
0x01, 0x01, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00
};
register_header_check(0, exs_header, sizeof(exs_header), &header_check_exs, file_stat);
}
#endif
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