'use strict';const crypto = require('crypto');/** * AES加密的配置  * 1.密鑰  * 2.偏移向量  * 3.算法模式CBC  * 4.補全值 */var AES_conf = {  key: getSecretKey(), //密鑰  iv: '1012132405963708', //偏移向量  padding: 'PKCS7Padding' //補全值}/** * 讀取密鑰key * 更具當前客戶端的版本vid、平臺platform獲取對應的key */function getSecretKey(){  return "abcdabcdabcdabcd";}/** * AES_128_CBC 加密  * 128位  * return base64 */function encryption(data) {  let key = AES_conf.key;  let iv = AES_conf.iv;  // let padding = AES_conf.padding;  var cipherChunks = [];  var cipher = crypto.createCipheriv('aes-128-cbc', key, iv);  cipher.setAutoPadding(true);  cipherChunks.push(cipher.update(data, 'utf8', 'base64'));  cipherChunks.push(cipher.final('base64'));  return cipherChunks.join('');}/** * 解密 * return utf8 */function decryption(data){  let key = AES_conf.key;  let iv = AES_conf.iv;  // let padding = AES_conf.padding;  var cipherChunks = [];  var decipher = crypto.createDecipheriv('aes-128-cbc', key, iv);  decipher.setAutoPadding(true);  cipherChunks.push(decipher.update(data, 'base64', 'utf8'));  cipherChunks.push(decipher.final('utf8'));  return cipherChunks.join('');}console.log(encryption('aaaaa4')); console.log(decryption('VuoXtyUolFyPrK50JnNUdw=='));