package com.u8.server.sdk.quanmingzhushou;



import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;



import javax.crypto.Cipher;

import javax.crypto.SecretKey;

import javax.crypto.spec.SecretKeySpec;

import java.security.Security;



/**

 * author Administrator on 2015-09-21.

 */

public class ThreeDesUtil {



    static {

        //添加新安全算法,如果用JCE就要把它添加进去

        Security.addProvider(new com.sun.crypto.provider.SunJCE());

    }



    /**

     * args在java中调用sun公司提供的3DES加密解密算法时，需要使

     * 用到$JAVA_HOME/jre/lib/目录下如下的4个jar包：

     * jce.jar

     * security/US_export_policy.jar

     * security/local_policy.jar

     * ext/sunjce_provider.jar

     */





    private static final String Algorithm = "DESede"; //定义加密算法,可用 DES,DESede,Blowfish



    //keybyte为加密密钥，长度为24字节

    //src为被加密的数据缓冲区（源）

    private static byte[] encryptMode(byte[] keybyte, byte[] src) throws Exception {

        //生成密钥

        SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);

        //加密

        Cipher c1 = Cipher.getInstance(Algorithm);

        c1.init(Cipher.ENCRYPT_MODE, deskey);

        return c1.doFinal(src);//在单一方面的加密或解密

    }



    //keybyte为加密密钥，长度为24字节

    //src为加密后的缓冲区

    private static byte[] decryptMode(byte[] keybyte, byte[] src) throws Exception {

        //生成密钥

        SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);

        //解密

        Cipher c1 = Cipher.getInstance(Algorithm);

        c1.init(Cipher.DECRYPT_MODE, deskey);

        return c1.doFinal(src);

    }





//    private static byte[] hex(String str) throws Exception {

//        String f = MD5Util.getMD5HexString(str);

//        byte[] bkeys = f.getBytes();

//        byte[] enk = new byte[24];

//        System.arraycopy(bkeys, 0, enk, 0, 24);

//        return enk;

//    }



    /**

     * 加密数据

     *

     * @param key 秘钥

     * @param str 需要加密内容

     * @return 加密后的数据

     */

    public static String thressDesEncrypt(String key, String str) throws Exception {

        return Base64.encode(encryptMode(key.getBytes(), str.getBytes()));

    }



    /**

     * 解密数据

     *

     * @param key 秘钥

     * @param str 需要解密内容

     * @return 解密后的数据

     */

    public static String thressDesDecrypt(String key, String str) throws Exception {

        return new String(decryptMode(key.getBytes(), Base64.decode(str)));

    }

}