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/*
File: file_ds_store.c
Copyright (C) 2015 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_ds_store)
#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 "common.h"
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_ds_store(file_stat_t *file_stat);
const file_hint_t file_hint_ds_store= {
.extension="DS_Store",
.description="Apple Desktop Services Store",
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_ds_store
};
struct ds_store_header
{
uint32_t magic1;
uint32_t magic;
uint32_t offset;
uint32_t size;
uint32_t offset2;
char unk2[16];
};
/*@
@ requires buffer_size >= sizeof(struct ds_store_header);
@ requires separation: \separated(&file_hint_ds_store, 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_ds_store(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 struct ds_store_header *hdr=(const struct ds_store_header *)buffer;
if(hdr->offset!=hdr->offset2)
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_ds_store.extension;
file_recovery_new->min_filesize=(uint64_t)be32(hdr->offset)+be32(hdr->size);
return 1;
}
static void register_header_check_ds_store(file_stat_t *file_stat)
{
static const unsigned char ds_store_header[8]= {
0x00, 0x00, 0x00, 0x01, 'B' , 'u' , 'd' , '1'
};
register_header_check(0, ds_store_header, sizeof(ds_store_header), &header_check_ds_store, file_stat);
}
#endif
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