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/*
File: file_vmg.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_vmg)
#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_vmg(file_stat_t *file_stat);
const file_hint_t file_hint_vmg = {
.extension = "vmg",
.description = "Nokia Text Message",
.max_filesize = PHOTOREC_MAX_FILE_SIZE,
.recover = 1,
.enable_by_default = 1,
.register_header_check = ®ister_header_check_vmg
};
/*@
@ requires file_recovery->file_check == &file_check_vmg;
@ requires valid_file_check_param(file_recovery);
@ ensures valid_file_check_result(file_recovery);
@ assigns *file_recovery->handle, errno, file_recovery->file_size;
@ assigns Frama_C_entropy_source;
@*/
static void file_check_vmg(file_recovery_t *file_recovery)
{
const unsigned char vmg_footer[0x15] = {
0x00, '\n', 0x00, 'E', 0x00, 'N', 0x00, 'D',
0x00, ':', 0x00, 'V', 0x00, 'M', 0x00, 'S',
0x00, 'G', 0x00, '\n', 0x00
};
file_search_footer(file_recovery, vmg_footer, sizeof(vmg_footer), 0);
}
/*@
@ requires separation: \separated(&file_hint_vmg, 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_vmg(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_vmg.extension;
file_recovery_new->file_check = &file_check_vmg;
return 1;
}
static void register_header_check_vmg(file_stat_t *file_stat)
{
static const unsigned char vmg_header[0x28] = {
'B', 0x00, 'E', 0x00, 'G', 0x00, 'I', 0x00,
'N', 0x00, ':', 0x00, 'V', 0x00, 'M', 0x00,
'S', 0x00, 'G', 0x00, '\n', 0x00, 'V', 0x00,
'E', 0x00, 'R', 0x00, 'S', 0x00, 'I', 0x00,
'O', 0x00, 'N', 0x00, ':', 0x00, '1', 0x00
};
register_header_check(0, vmg_header, sizeof(vmg_header), &header_check_vmg, file_stat);
}
#endif
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