"use strict";
const crypto = require("crypto");

//封装使用AES加密的方法
function aesEncrept(data, key){
　　//实例化一个cipher加密对象，使用aes192进行加密，key作为密钥
　　const cipher = crypto.createCipher("aes192",key);
　　//使用cipher对data进行加密，源数据类型为utf-8，输出数据类型为hex
　　let crypted = cipher.update(data, "utf-8", "hex");
　　crypted += cipher.final("hex");
　　return crypted;
}

//封装对应的AES解密方法
function aesDecrept(encrepted, key) {
　　//实例化一个decipher解密对象，使用aes192进行解密，key作为密钥
　　const decipher = crypto.createDecipher("aes192", key);
　　//使用decipher对encrepted进行解密，源数据类型为hex，输出数据类型为utf-8
　　let decrypted = decipher.update(encrepted, "hex", "utf-8");
　　decrypted += decipher.final("utf-8");
　　return decrypted;
}

//需要加密的数据
let data = "This is what needs to be encrepted"；

//AES加密的密钥
let keyword = "This is the key"；

//使用自定义的aesEncrept方法进行加密
let encrepted = aesEncrept(data, keyword)；

//使用自定义的aesDecrept方法对加密数据进行解密
let decrepted = aesDecrept(encrepted, keyword);

console.log( "原始数据：" + data );
console.log( "经AES加密后：" + encrepted );
console.log( "经相应的解密后：" + decrepted );