Class ToolMAC

security/src/main/java/pro/tools/security/md/ToolMAC.java:16–254

MAC加密组件 @author SeanDragon

 * @author SeanDragon
 */
public final class ToolMAC {

    private ToolMAC() {
        throw new UnsupportedOperationException("我是工具类，别初始化我。。。");
    }

    /**
     * 初始化HmacMD5密钥
     *
     * @return
     *
     * @throws Exception
     */
    public static byte[] initHmacMD5Key() throws NoSuchAlgorithmException {

        // 初始化KeyGenerator
        KeyGenerator keyGenerator = KeyGenerator.getInstance("HmacMD5");

        // 产生秘密密钥
        SecretKey secretKey = keyGenerator.generateKey();

        // 获得密钥
        return secretKey.getEncoded();
    }

    /**
     * HmacMD5加密
     *
     * @param data
     *         待加密数据
     * @param key
     *         密钥
     *
     * @return byte[] 消息摘要
     *
     * @throws Exception
     */
    public static byte[] encodeHmacMD5(byte[] data, byte[] key) throws NoSuchAlgorithmException, InvalidKeyException {

        // 还原密钥
        SecretKey secretKey = new SecretKeySpec(key, "HmacMD5");

        // 实例化Mac "SslMacMD5"
        Mac mac = Mac.getInstance("SslMacMD5");//secretKey.getAlgorithm());

        // 初始化Mac
        mac.init(secretKey);

        // 执行消息摘要
        return mac.doFinal(data);
    }

    /**
     * 初始化HmacSHA1密钥
     *
     * @return
     *
     * @throws Exception