Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (c) 2014-2015 Tozny LLC
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * Created by Isaac Potoczny-Jones on 11/12/14.
 */

import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

import javax.crypto.Mac;
import javax.crypto.SecretKey;

public class Main {
    private static final String HMAC_ALGORITHM = "HmacSHA256";

    /**
     * Generate the mac based on HMAC_ALGORITHM
     *
     * @param integrityKey The key used for hmac
     * @param byteCipherText the cipher text
     * @return A byte array of the HMAC for the given key & ciphertext
     * @throws NoSuchAlgorithmException
     * @throws InvalidKeyException
     */
    public static byte[] generateMac(byte[] byteCipherText, SecretKey integrityKey)
            throws NoSuchAlgorithmException, InvalidKeyException {
        //Now compute the mac for later integrity checking
        Mac sha256_HMAC = Mac.getInstance(HMAC_ALGORITHM);
        sha256_HMAC.init(integrityKey);
        return sha256_HMAC.doFinal(byteCipherText);
    }
}