testdisk/src/file_fh5.c

85 lines
3 KiB
C

/*
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.
*/
#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__ ((__packed__));
typedef struct fh5_header_s fh5_header_t;
static void register_header_check_fh5(file_stat_t *file_stat);
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);
static void file_check_fh5(file_recovery_t *file_recovery);
const file_hint_t file_hint_fh5= {
.extension="fh5",
.description="Macromedia Freehand 5",
.min_header_distance=0,
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=&register_header_check_fh5
};
static const unsigned char fh5_header[8] = { 0x41, 0x47, 0x44, 0x31, 0xbe, 0xb8, 0xbb, 0xce };
static void register_header_check_fh5(file_stat_t *file_stat)
{
register_header_check(0, fh5_header,sizeof(fh5_header), &header_check_fh5, file_stat);
}
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;
if(memcmp(fh5_buffer->id,fh5_header,sizeof(fh5_header))==0)
{
reset_file_recovery(file_recovery_new);
file_recovery_new->min_filesize=4096,
file_recovery_new->calculated_file_size=be32(fh5_buffer->datalen);
file_recovery_new->extension=file_hint_fh5.extension;
file_recovery_new->file_check=file_check_fh5;
// log_debug("header_check_fh5: Guessed length : %u\n", fh5_file_size);
return 1;
}
return 0;
}
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;
}