DES 双向加密算法 DESUtil

package com.xgh.encryption.algorithm.test;

import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

import junit.framework.TestCase;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

/***
 *  DES 双向加密算法
 * @author xgh
 *
 */
public class DESUtil extends TestCase{

	/***
	 * DES 双向加密算法
	 * @param content   待加密内容 
	 * @param password  加密密钥
	 * @return
	 */
	public  byte[] testEncryptDES() throws Exception{ 
		String content = "Hello,明天天气不错";
		String password = "123456";
		KeyGenerator kgen = KeyGenerator.getInstance("DES");
		kgen.init(128, new SecureRandom(password.getBytes()));
		SecretKey secretKey = kgen.generateKey();
		byte[] enCodeFormat = secretKey.getEncoded();
		SecretKeySpec key = new SecretKeySpec(enCodeFormat, "DES");
		Cipher cipher = Cipher.getInstance("DES");// 创建密码器
		byte[] byteContent = content.getBytes("UTF-8");
		cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
		byte[] result = cipher.doFinal(byteContent);
		System.out.println("DES加密原数据:");
		System.out.println(content);
		System.out.println("DES加密后的Base64结果:");
		System.out.println(new BASE64Encoder().encode(result));
		System.out.println("------------------------------------");
		return result; // 加密
	}
	
	/***
	 *  DES 双向加密算法
	 * @param content  待解密内容 
	 * @param password 解密密钥
	 * @return
	 */
	public  byte[] testDecryptDES() throws Exception{
		String content = "2M8d6HQ0qtXqSSuL83ILs348ls6C8JlZnfu0UFgCkOw=";
		String password = "123456";
		byte[] contentbyte = new BASE64Decoder().decodeBuffer(content);
		KeyGenerator kgen = KeyGenerator.getInstance("DES");
		kgen.init(128, new SecureRandom(password.getBytes()));
		SecretKey secretKey = kgen.generateKey();
		byte[] enCodeFormat = secretKey.getEncoded();
		SecretKeySpec key = new SecretKeySpec(enCodeFormat, "DES");
		Cipher cipher = Cipher.getInstance("DES");// 创建密码器
		cipher.init(Cipher.DECRYPT_MODE, key);// 初始化
		byte[] result = cipher.doFinal(contentbyte);
		System.out.println("解密结果:");
		System.out.println(new String(result,"UTF-8"));
		System.out.println("------------------------------------");
		return result; // 加密
	}
	

}