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/*
File: file_vault.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_vault)
#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_vault(file_stat_t *file_stat);
const file_hint_t file_hint_vault = {
.extension = "vault",
.description = "McAfee Anti-Theft/FileVault",
.max_filesize = PHOTOREC_MAX_FILE_SIZE,
.recover = 1,
.enable_by_default = 1,
.register_header_check = ®ister_header_check_vault
};
/*
* 03200be0 00 00 00 38 65 31 39 37 34 32 30 2d 39 35 65 34 |...8e197420-95e4|
* 03200bf0 2d 34 36 33 33 2d 61 33 34 66 2d 34 61 66 64 36 |-4633-a34f-4afd6|
* 03200c00 30 64 61 62 64 64 37 00 |0dabdd7.|
* */
/*@
@ requires buffer_size >= 2*29;
@ requires file_recovery->data_check==&data_check_vault;
@ requires valid_data_check_param(buffer, buffer_size, file_recovery);
@ terminates \true;
@ ensures valid_data_check_result(\result, file_recovery);
@ assigns file_recovery->calculated_file_size;
@*/
static data_check_t data_check_vault(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
{
unsigned int i;
/*@ assert file_recovery->calculated_file_size <= PHOTOREC_MAX_FILE_SIZE; */
/*@ assert file_recovery->file_size <= PHOTOREC_MAX_FILE_SIZE; */
/*@
@ loop assigns i, file_recovery->calculated_file_size;
@ loop variant buffer_size - (i + 29);
@*/
for(i = (buffer_size / 2) - 28; i + 29 <= buffer_size; i++)
{
if(buffer[i] == '-' && buffer[i + 5] == '-' && buffer[i + 10] == '-' && buffer[i + 15] == '-' && buffer[i + 28] == '\0')
{
file_recovery->calculated_file_size = file_recovery->file_size + i + 29 - (buffer_size / 2);
return DC_STOP;
}
}
file_recovery->calculated_file_size = file_recovery->file_size + (buffer_size / 2);
return DC_CONTINUE;
}
/*@
@ requires separation: \separated(&file_hint_vault, buffer+(..), file_recovery, file_recovery_new);
@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ terminates \true;
@ ensures valid_header_check_result(\result, file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_vault(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)
{
reset_file_recovery(file_recovery_new);
file_recovery_new->extension = file_hint_vault.extension;
if(file_recovery_new->blocksize >= 29)
{
file_recovery_new->data_check = &data_check_vault;
file_recovery_new->file_check = &file_check_size;
}
return 1;
}
static void register_header_check_vault(file_stat_t *file_stat)
{
static const unsigned char vault_header[0x12] = {
'S', 'a', 'f', 'e', 'B', 'o', 'o', 't',
'E', 'n', 'c', 'V', 'o', 'l', '1', 0x00,
0x01, 0x01
};
register_header_check(0, vault_header, sizeof(vault_header), &header_check_vault, file_stat);
}
#endif
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