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/*
File: file_xpt.c
Copyright (C) 2009 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_xpt)
#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_xpt(file_stat_t *file_stat);
const file_hint_t file_hint_xpt = {
.extension = "xpt",
.description = "Mozilla XPCOM Type Library",
.max_filesize = PHOTOREC_MAX_FILE_SIZE,
.recover = 1,
.enable_by_default = 1,
.register_header_check = ®ister_header_check_xpt
};
/* Read http://www.mozilla.org/scriptable/typelib_file.html
* for more information about this file format */
struct TypeLibHeader
{
char magic[16];
uint8_t major_version;
uint8_t minor_version;
uint16_t num_interfaces;
uint32_t file_length;
} __attribute__((gcc_struct, __packed__));
/*@
@ requires buffer_size >= sizeof(struct TypeLibHeader);
@ requires separation: \separated(&file_hint_xpt, 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_xpt(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 TypeLibHeader *xpt = (const struct TypeLibHeader *)buffer;
const unsigned int file_length = be32(xpt->file_length);
if(file_length < 65)
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension = file_hint_xpt.extension;
file_recovery_new->min_filesize = 65;
file_recovery_new->calculated_file_size = file_length;
file_recovery_new->data_check = &data_check_size;
file_recovery_new->file_check = &file_check_size;
return 1;
}
static void register_header_check_xpt(file_stat_t *file_stat)
{
static const unsigned char xpt_header[16] = {
'X', 'P', 'C', 'O', 'M', '\n', 'T', 'y',
'p', 'e', 'L', 'i', 'b', '\r', '\n', 0x1a
};
register_header_check(0, xpt_header, sizeof(xpt_header), &header_check_xpt, file_stat);
}
#endif
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