Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Advance Sudoku - a sudoku puzzle game for Android.
 * Copyright 2015 Joachim Thilo
 *
 * This file is part of Andoku.
 *
 * Advance Sudoku 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 3 of the License, or
 * (at your option) any later version.
 *
 * Advance Sudoku 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 Advance Sudoku .  If not, see <http://www.gnu.org/licenses/>.
 */

import java.io.UnsupportedEncodingException;
import java.security.GeneralSecurityException;

import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

public class Main {
    private static final String MAC_NAME = "HmacSHA1";

    private static byte[] sign(String keyString, byte[] message) throws GeneralSecurityException {
        byte[] keyBytes = utf8(keyString);

        SecretKey key = new SecretKeySpec(keyBytes, MAC_NAME);
        Mac mac = Mac.getInstance(MAC_NAME);
        mac.init(key);

        return mac.doFinal(message);
    }

    private static byte[] utf8(String keyString) {
        try {
            return keyString.getBytes("utf-8");
        } catch (UnsupportedEncodingException e) {
            throw new IllegalStateException(e); // utf-8 is supported!
        }
    }
}