3DES的前后端加密代码实例

分享一下 3DES 的前后端加密。

Java：

package com.core.util;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
import java.security.Key;
import java.util.*;
import java.util.concurrent.TimeUnit;

/**
 * 3DES加密工具类
 */
public class DesUtils {
    // 密钥  
    private final static String secretKey = "自己的";
    // 向量  
    private final static String iv = "01234567";
    // 加解密统一使用的编码方式  
    private final static String encoding = "utf-8";

    /**
     * 3DES加密
     *
     * @param plainText 普通文本
     * @return
     * @throws Exception
     */
    public static String encode(String plainText) throws Exception {
        Key deskey = null;
        DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);
        Cipher cipher = Cipher.getInstance("desede/CBC/PKCS5Padding");
        IvParameterSpec ips = new IvParameterSpec(iv.getBytes());
        cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
        byte[] encryptData = cipher.doFinal(plainText.getBytes(encoding));
        return Base64.encode(encryptData);
    }

    /**
     * 3DES解密
     *
     * @param encryptText 加密文本
     * @return
     * @throws Exception
     */
    public static String decode(String encryptText) throws Exception {
        Key deskey = null;
        DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);
        Cipher cipher = Cipher.getInstance("desede/CBC/PKCS5Padding");
        IvParameterSpec ips = new IvParameterSpec(iv.getBytes());
        cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
        byte[] decryptData = cipher.doFinal(Base64.decode(encryptText));
        return new String(decryptData, encoding);
    }
 }

Java中用到的base64加密前参考之前的 BASE43 加密

微信小程序 js

var cryptoJS = require('../utils/CryptoJS.js');

var key = "自己的";//秘钥
var iv = "01234567";//向量

/**
 * 加密
 */
function encryptByDES(message) {
  var keyHex = cryptoJS.CryptoJS.enc.Utf8.parse(key);
  var encrypted = cryptoJS.CryptoJS.TripleDES.encrypt(message, keyHex, {
    iv: cryptoJS.CryptoJS.enc.Utf8.parse(iv),
    mode: cryptoJS.CryptoJS.mode.CBC,
    padding: cryptoJS.CryptoJS.pad.Pkcs7
  });
  return encrypted.toString();
}

/**
 * 解密
 */
function decryptByDES(ciphertext) {
  var keyHex = cryptoJS.CryptoJS.enc.Utf8.parse(key);
  
  var decrypted = cryptoJS.CryptoJS.TripleDES.decrypt({
    ciphertext: cryptoJS.CryptoJS.enc.Base64.parse(ciphertext)
  }, keyHex, {
      iv: cryptoJS.CryptoJS.enc.Utf8.parse(iv),
      mode: cryptoJS.CryptoJS.mode.CBC,
      padding: cryptoJS.CryptoJS.pad.Pkcs7
    });

  return decrypted.toString(cryptoJS.CryptoJS.enc.Utf8);
}   


module.exports = {
  encryptByDES: encryptByDES,
  decryptByDES: decryptByDES
}      

导入的 CryptoJS.js 在本人的博客中，请自行查找。