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/*
File: file_wpd.c
Copyright (C) 1998-2007 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_wpd)
#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_wpd(file_stat_t *file_stat);
const file_hint_t file_hint_wpd = {
.extension = "wpd",
.description = "Corel Documents",
.max_filesize = PHOTOREC_MAX_FILE_SIZE,
.recover = 1,
.enable_by_default = 1,
.register_header_check = ®ister_header_check_wpd
};
struct wpd_hdr
{
unsigned char magic[4];
uint32_t documentOffset;
uint8_t productType;
uint8_t fileType;
uint8_t majorVersion;
uint8_t minorVersion;
uint16_t documentEncryption;
uint16_t indexHeaderOffset; /* 14 */
uint32_t unk;
uint32_t documentSize; /* 20: WP 6.1 or later ? */
} __attribute__((gcc_struct, __packed__));
/*@
@ requires buffer_size >= sizeof(struct wpd_hdr);
@ requires separation: \separated(&file_hint_wpd, 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_wpd(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 wpd_hdr *hdr = (const struct wpd_hdr *)buffer;
const unsigned int documentOffset = le32(hdr->documentOffset);
if(hdr->fileType == 0x0a && hdr->majorVersion == 0x02)
{
const unsigned int documentSize = le32(hdr->documentSize);
/* WP 6 */
if(hdr->minorVersion == 0)
{
if(documentOffset < 20)
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension = file_hint_wpd.extension;
file_recovery_new->min_filesize = documentOffset;
return 1;
}
if(documentOffset < sizeof(struct wpd_hdr) || documentSize < documentOffset)
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension = file_hint_wpd.extension;
file_recovery_new->calculated_file_size = documentSize;
file_recovery_new->data_check = &data_check_size;
file_recovery_new->file_check = &file_check_size;
return 1;
}
if(/* WP5 */
(hdr->fileType == 0x0a && hdr->majorVersion == 0x00) ||
/* WP MAC 2.x, 3.0-3.5, 3.5e */
(hdr->fileType == 0x2c && (hdr->majorVersion >= 0x02 && hdr->majorVersion <= 0x04)))
{
if(documentOffset < 20)
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension = file_hint_wpd.extension;
file_recovery_new->min_filesize = documentOffset;
return 1;
}
return 0;
}
static void register_header_check_wpd(file_stat_t *file_stat)
{
static const unsigned char wpd_header[4] = { 0xff, 'W', 'P', 'C' };
register_header_check(0, wpd_header, sizeof(wpd_header), &header_check_wpd, file_stat);
}
#endif
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