加密解密

在线加密解密：
http://tool.chacuo.net/crypt3des

密码（长度8的倍数）和偏移量配置在配置文件中

3DES加密解密工具类

package com.it.util;

import java.security.Key;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;

import sun.misc. 64Decoder;
import sun.misc. 64Encoder;

public class Des3 {

	// 加密
	public static String des3EncodeCBC(String key, String keyiv, String data) throws Exception {
		byte[] str5 = des3EncodeCBC(key.getBytes(), keyiv.getBytes(), data.getBytes());
		return new  64Encoder().encode(str5);
	}

	// 解密
	public static String des3DecodeCBC(String key, String keyiv, String str) throws Exception {
		byte[] data = des3DecodeCBC(key.getBytes(), keyiv.getBytes(), new  64Decoder().decodeBuffer(str));
		return new String(data);
	}

	/**
	 * ECB加密,不要IV
	 * 
	 * @param key 密钥
	 * @param data 明文
	 * @return  64编码的密文
	 * @throws Exception
	 */
	public static byte[] des3EncodeECB(byte[] key, byte[] data) throws Exception {
		Key deskey = null;
		DESedeKeySpec spec = new DESedeKeySpec(key);
		SecretKeyFactory keyfactory = SecretKeyFactory.getInstance(\"desede\");
		deskey = keyfactory.generateSecret(spec);
		Cipher cipher = Cipher.getInstance(\"desede\" + \"/ECB/PKCS5Padding\");
		cipher.init(Cipher.ENCRYPT_MODE, deskey);
		byte[] bOut = cipher.doFinal(data);
		return bOut;
	}

	/**
	 * ECB解密,不要IV
	 * 
	 * @param key 密钥
	 * @param data  64编码的密文
	 * @return 明文
	 * @throws Exception
	 */
	public static byte[] ees3DecodeECB(byte[] key, byte[] data) throws Exception {
		Key deskey = null;
		DESedeKeySpec spec = new DESedeKeySpec(key);
		SecretKeyFactory keyfactory = SecretKeyFactory.getInstance(\"desede\");
		deskey = keyfactory.generateSecret(spec);
		Cipher cipher = Cipher.getInstance(\"desede\" + \"/ECB/PKCS5Padding\");
		cipher.init(Cipher.DECRYPT_MODE, deskey);
		byte[] bOut = cipher.doFinal(data);
		return bOut;
	}

	/**
	 * CBC加密
	 * 
	 * @param key 密钥
	 * @param keyiv 偏移量
	 * @param data 明文
	 * @return  64编码的密文
	 * @throws Exception
	 */
	public static byte[] des3EncodeCBC(byte[] key, byte[] keyiv, byte[] data) throws Exception {
		Key deskey = null;
		DESedeKeySpec spec = new DESedeKeySpec(key);
		SecretKeyFactory keyfactory = SecretKeyFactory.getInstance(\"desede\");
		deskey = keyfactory.generateSecret(spec);
		Cipher cipher = Cipher.getInstance(\"desede\" + \"/CBC/PKCS5Padding\");
		IvParameterSpec ips = new IvParameterSpec(keyiv);
		cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
		byte[] bOut = cipher.doFinal(data);
		return bOut;
	}

	/**
	 * CBC解密
	 * 
	 * @param key 密钥
	 * @param keyiv 偏移量
	 * @param data  64编码的密文
	 * @return 明文
	 * @throws Exception
	 */
	public static byte[] des3DecodeCBC(byte[] key, byte[] keyiv, byte[] data) throws Exception {
		Key deskey = null;
		DESedeKeySpec spec = new DESedeKeySpec(key);
		SecretKeyFactory keyfactory = SecretKeyFactory.getInstance(\"desede\");
		deskey = keyfactory.generateSecret(spec);
		Cipher cipher = Cipher.getInstance(\"desede\" + \"/CBC/PKCS5Padding\");
		IvParameterSpec ips = new IvParameterSpec(keyiv);
		cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
		byte[] bOut = cipher.doFinal(data);
		return bOut;
	}
}