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/*
File: file_crw.c
Copyright (C) 1998-2005,2007-2008 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_crw)
#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"
#include "log.h"
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_crw(file_stat_t *file_stat);
const file_hint_t file_hint_crw= {
.extension="crw",
.description="Canon Raw picture",
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_crw
};
/*@
@ 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_crw(file_recovery_t *file_recovery)
{
const unsigned char crw_footer[2]= { 0x0A, 0x30};
file_search_footer(file_recovery, crw_footer, sizeof(crw_footer), 12);
}
/*@
@ requires buffer_size >= 6+8;
@ requires separation: \separated(&file_hint_crw, 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_crw(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(((buffer[0]==0x49 && buffer[1]==0x49)||(buffer[0]==0x4D && buffer[1]==0x4D))
&& memcmp(buffer+6,"HEAPCCDR",8)==0)
{
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_crw.extension;
file_recovery_new->file_check=&file_check_crw;
return 1;
}
return 0;
}
static void register_header_check_crw(file_stat_t *file_stat)
{
static const unsigned char crw_header_be[2]= {'I','I'};
static const unsigned char crw_header_le[2]= {'M','M'};
register_header_check(0, crw_header_be, sizeof(crw_header_be), &header_check_crw, file_stat);
#ifndef DISABLED_FOR_FRAMAC
register_header_check(0, crw_header_le, sizeof(crw_header_le), &header_check_crw, file_stat);
#endif
}
#endif
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