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/*
File: file_fh5.c
Copyright (C) 2007 Christophe GRENIER <grenier@cgsecurity.org>
Copyright (C) 2007 Peter Turczak <pspamt@netconsequence.de>
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_fh5)
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include "types.h"
#include "common.h"
#include "filegen.h"
struct fh5_header_s
{
unsigned char id[8];
uint32_t datalen; /* Big Endian size w/o headers */
} __attribute__ ((gcc_struct, __packed__));
typedef struct fh5_header_s fh5_header_t;
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_fh5(file_stat_t *file_stat);
const file_hint_t file_hint_fh5= {
.extension="fh5",
.description="Macromedia Freehand 5",
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_fh5
};
/*@
@ requires file_recovery->file_check == &file_check_fh5;
@ requires valid_file_check_param(file_recovery);
@ ensures valid_file_check_result(file_recovery);
@ assigns file_recovery->file_size;
@*/
static void file_check_fh5(file_recovery_t *file_recovery)
{
if(file_recovery->file_size < file_recovery->calculated_file_size)
file_recovery->file_size=0;
else if(file_recovery->file_size> file_recovery->calculated_file_size+4096)
file_recovery->file_size=file_recovery->calculated_file_size+4096;
}
/*@
@ requires buffer_size >= sizeof(fh5_header_t);
@ requires separation: \separated(&file_hint_fh5, 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_fh5(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)
{
const fh5_header_t *fh5_buffer=(const fh5_header_t *) buffer;
const unsigned int datalen=be32(fh5_buffer->datalen);
if(datalen < sizeof(struct fh5_header_s))
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->min_filesize=4096;
file_recovery_new->calculated_file_size=datalen;
file_recovery_new->extension=file_hint_fh5.extension;
file_recovery_new->file_check=&file_check_fh5;
return 1;
}
static void register_header_check_fh5(file_stat_t *file_stat)
{
static const unsigned char fh5_header[8] = { 0x41, 0x47, 0x44, 0x31, 0xbe, 0xb8, 0xbb, 0xce };
register_header_check(0, fh5_header,sizeof(fh5_header), &header_check_fh5, file_stat);
}
#endif
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