104 lines
3.8 KiB
C
104 lines
3.8 KiB
C
/*
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File: file_vault.c
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Copyright (C) 2011 Christophe GRENIER <grenier@cgsecurity.org>
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This software is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write the Free Software Foundation, Inc., 51
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Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_vault)
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include <stdio.h>
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#include "types.h"
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#include "filegen.h"
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/*@ requires valid_register_header_check(file_stat); */
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static void register_header_check_vault(file_stat_t *file_stat);
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const file_hint_t file_hint_vault = {
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.extension = "vault",
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.description = "McAfee Anti-Theft/FileVault",
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.max_filesize = PHOTOREC_MAX_FILE_SIZE,
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.recover = 1,
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.enable_by_default = 1,
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.register_header_check = ®ister_header_check_vault
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};
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/*
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* 03200be0 00 00 00 38 65 31 39 37 34 32 30 2d 39 35 65 34 |...8e197420-95e4|
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* 03200bf0 2d 34 36 33 33 2d 61 33 34 66 2d 34 61 66 64 36 |-4633-a34f-4afd6|
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* 03200c00 30 64 61 62 64 64 37 00 |0dabdd7.|
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* */
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/*@
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@ requires buffer_size >= 2*29;
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@ requires file_recovery->data_check==&data_check_vault;
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@ requires valid_data_check_param(buffer, buffer_size, file_recovery);
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@ ensures valid_data_check_result(\result, file_recovery);
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@ assigns file_recovery->calculated_file_size;
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@*/
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static data_check_t data_check_vault(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
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{
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unsigned int i;
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/*@ assert file_recovery->calculated_file_size <= PHOTOREC_MAX_FILE_SIZE; */
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/*@ assert file_recovery->file_size <= PHOTOREC_MAX_FILE_SIZE; */
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/*@ loop assigns i, file_recovery->calculated_file_size; */
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for(i = (buffer_size / 2) - 28; i + 29 <= buffer_size; i++)
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{
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if(buffer[i] == '-' && buffer[i + 5] == '-' && buffer[i + 10] == '-' && buffer[i + 15] == '-' && buffer[i + 28] == '\0')
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{
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file_recovery->calculated_file_size = file_recovery->file_size + i + 29 - (buffer_size / 2);
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return DC_STOP;
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}
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}
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file_recovery->calculated_file_size = file_recovery->file_size + (buffer_size / 2);
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return DC_CONTINUE;
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}
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/*@
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@ requires separation: \separated(&file_hint_vault, buffer+(..), file_recovery, file_recovery_new);
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@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
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@ ensures valid_header_check_result(\result, file_recovery_new);
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@ assigns *file_recovery_new;
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@*/
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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)
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{
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reset_file_recovery(file_recovery_new);
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file_recovery_new->extension = file_hint_vault.extension;
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if(file_recovery_new->blocksize >= 29)
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{
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file_recovery_new->data_check = &data_check_vault;
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file_recovery_new->file_check = &file_check_size;
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}
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return 1;
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}
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static void register_header_check_vault(file_stat_t *file_stat)
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{
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static const unsigned char vault_header[0x12] = {
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'S', 'a', 'f', 'e', 'B', 'o', 'o', 't',
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'E', 'n', 'c', 'V', 'o', 'l', '1', 0x00,
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0x01, 0x01
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};
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register_header_check(0, vault_header, sizeof(vault_header), &header_check_vault, file_stat);
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}
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#endif
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