100 lines
3.4 KiB
C
100 lines
3.4 KiB
C
/*
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File: file_win.c
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Copyright (C) 2009 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_win)
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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_STDLIB_H
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#include <stdlib.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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#include "utfsize.h"
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#include "common.h"
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/*@ requires valid_register_header_check(file_stat); */
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static void register_header_check_win(file_stat_t *file_stat);
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const file_hint_t file_hint_win = {
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.extension = "win",
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.description = "Opera preferences",
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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_win
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};
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/*@
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@ requires file_recovery->data_check==&data_check_win;
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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_win(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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unsigned int offset = 0;
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if(file_recovery->calculated_file_size == 0)
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offset = 3;
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i = UTFsize(&buffer[buffer_size / 2 + offset], buffer_size / 2 - offset);
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if(i < buffer_size / 2 - offset)
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{
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if(i >= 10)
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file_recovery->calculated_file_size = file_recovery->file_size + offset + i;
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return DC_STOP;
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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_win, 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_win(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_win.extension;
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file_recovery_new->data_check = &data_check_win;
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file_recovery_new->file_check = &file_check_size;
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/*@ assert valid_file_recovery(file_recovery_new); */
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return 1;
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}
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static void register_header_check_win(file_stat_t *file_stat)
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{
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static const unsigned char win_header[31] = {
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0xef, 0xbb, 0xbf, 'O', 'p', 'e', 'r', 'a',
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' ', 'P', 'r', 'e', 'f', 'e', 'r', 'e',
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'n', 'c', 'e', 's', ' ', 'v', 'e', 'r',
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's', 'i', 'o', 'n', ' ', '2', '.'
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};
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register_header_check(0, win_header, sizeof(win_header), &header_check_win, file_stat);
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}
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#endif
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