171 lines
6.5 KiB
C
171 lines
6.5 KiB
C
/*
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File: file_pst.c
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Copyright (C) 2006-2007 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_pst)
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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_pst(file_stat_t *file_stat);
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const file_hint_t file_hint_pst= {
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.extension="pst",
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.description="Outlook (pst/wab/dbx)",
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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_pst
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};
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#define INDEX_TYPE_OFFSET 0x0A
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#define FILE_SIZE_POINTER 0xA8
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#define FILE_SIZE_POINTER_64 0xB8
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#define DBX_SIZE_POINTER 0x7C
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/*@
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@ requires buffer_size >= DBX_SIZE_POINTER + 4;
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@ requires separation: \separated(&file_hint_pst, 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_dbx(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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const uint64_t size=(uint64_t)buffer[DBX_SIZE_POINTER] +
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(((uint64_t)buffer[DBX_SIZE_POINTER+1])<<8) +
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(((uint64_t)buffer[DBX_SIZE_POINTER+2])<<16) +
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(((uint64_t)buffer[DBX_SIZE_POINTER+3])<<24);
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if(size < DBX_SIZE_POINTER + 4)
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return 0;
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reset_file_recovery(file_recovery_new);
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file_recovery_new->extension="dbx";
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file_recovery_new->calculated_file_size=size;
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file_recovery_new->data_check=&data_check_size;
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file_recovery_new->file_check=&file_check_size;
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return 1;
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}
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/*
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Outlook 2000
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0x0000 uchar signature[4];
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0x000a uchar indexType;
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0x00a8 uint32_t total_file_size;
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0x00b8 uint32_t backPointer2;
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0x00bc uint32_t offsetIndex2;
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0x00c0 uint32_t backPointer1;
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0x00c4 uint32_t offsetIndex1;
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0x01cd uchar encryptionType;
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Outlook 2003
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0x0000 uchar signature[4];
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0x000a uchar indexType;
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0x00b8 uint64_t total_file_size;
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0x00d8 uint64_t backPointer2;
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0x00e0 uint64_t offsetIndex2;
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0x00e8 uint64_t backPointer1;
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0x00f0 uint64_t offsetIndex1;
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0x0201 uchar encryptionType;
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More information about the file structure can be found at
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http://www.five-ten-sg.com/libpst/
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*/
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/*@
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@ requires separation: \separated(&file_hint_pst, 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_wab(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="wab"; /* Adresse Book */
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return 1;
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}
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/*@
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@ requires buffer_size >= FILE_SIZE_POINTER + 4;
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@ requires buffer_size >= FILE_SIZE_POINTER_64 + 8;
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@ requires separation: \separated(&file_hint_pst, 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_pst(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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if(buffer[INDEX_TYPE_OFFSET]==0x0e ||
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buffer[INDEX_TYPE_OFFSET]==0x0f)
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{
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const uint64_t size=(uint64_t)buffer[FILE_SIZE_POINTER] +
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(((uint64_t)buffer[FILE_SIZE_POINTER+1])<<8) +
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(((uint64_t)buffer[FILE_SIZE_POINTER+2])<<16) +
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(((uint64_t)buffer[FILE_SIZE_POINTER+3])<<24);
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if(size < 0x1cd)
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return 0;
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/* Outlook 2000 and older versions */
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reset_file_recovery(file_recovery_new);
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file_recovery_new->extension=file_hint_pst.extension;
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file_recovery_new->calculated_file_size=size;
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file_recovery_new->data_check=&data_check_size;
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file_recovery_new->file_check=&file_check_size;
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return 1;
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}
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else
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// if(buffer[INDEX_TYPE_OFFSET]==0x15 || buffer[INDEX_TYPE_OFFSET]==0x17)
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{ /* Outlook 2003 */
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const uint64_t size=(uint64_t)buffer[FILE_SIZE_POINTER_64] +
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(((uint64_t)buffer[FILE_SIZE_POINTER_64+1])<<8) +
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(((uint64_t)buffer[FILE_SIZE_POINTER_64+2])<<16) +
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(((uint64_t)buffer[FILE_SIZE_POINTER_64+3])<<24) +
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(((uint64_t)buffer[FILE_SIZE_POINTER_64+4])<<32) +
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(((uint64_t)buffer[FILE_SIZE_POINTER_64+5])<<40) +
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(((uint64_t)buffer[FILE_SIZE_POINTER_64+6])<<48) +
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(((uint64_t)buffer[FILE_SIZE_POINTER_64+7])<<56);
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if(size < 0x201)
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return 0;
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reset_file_recovery(file_recovery_new);
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file_recovery_new->extension=file_hint_pst.extension;
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file_recovery_new->calculated_file_size=size;
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file_recovery_new->data_check=&data_check_size;
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file_recovery_new->file_check=&file_check_size;
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return 1;
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}
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}
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static void register_header_check_pst(file_stat_t *file_stat)
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{
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static const unsigned char dbx_header[4]= { 0xCF, 0xAD, 0x12, 0xFE };
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static const unsigned char wab_header[16] = { 0x9c, 0xcb, 0xcb, 0x8d, 0x13, 0x75, 0xd2, 0x11,
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0x91, 0x58, 0x00, 0xc0, 0x4f, 0x79, 0x56, 0xa4 };
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register_header_check(0, "!BDN", 4, &header_check_pst, file_stat);
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register_header_check(0, dbx_header,sizeof(dbx_header), &header_check_dbx, file_stat);
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register_header_check(0, wab_header,sizeof(wab_header), &header_check_wab, file_stat);
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}
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#endif
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