Node.js 内置模块crypto加密模块AES入门攻略
AES：高级加密标准 ( Advanced Encryption Standard )，AES是一种对称加密算法：加密需要密钥，且加密密钥和解密密钥相同
下面是AES加密的Node实现：
"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; } let data = "This is what needs to be encrepted", keyword = "This is the key", encrepted = aesEncrept(data, keyword), decrepted = aesDecrept(encrepted, keyword); console.log( "原始数据：" + data ); console.log( "经过AES加密后：" + encrepted ); console.log( "经过相应的解密后：" + decrepted );注：
所以才有了下面的这个写法：
let decrypted = decipher.update(encrepted, "hex", "utf8"); decrypted += decipher.final("utf-8");目的就是为了对全部的数据进行加密或解密
