crypto---加密

1.nodejs中aes的使用

var crypto = require('crypto');
 
/**
 * 加密方法
 * @param key 加密key
 * @param iv       向量
 * @param data     需要加密的数据
 * @returns string
 */
var encrypt = function (key, iv, data) {
    var cipher = crypto.createCipheriv('aes-128-cbc', key, iv);
    var crypted = cipher.update(data, 'utf8', 'binary');
    crypted += cipher.final('binary');
    crypted = new Buffer(crypted, 'binary').toString('base64');
    return crypted;
};
 
/**
 * 解密方法
 * @param key      解密的key
 * @param iv       向量
 * @param crypted  密文
 * @returns string
 */
var decrypt = function (key, iv, crypted) {
    crypted = new Buffer(crypted, 'base64').toString('binary');
    var decipher = crypto.createDecipheriv('aes-128-cbc', key, iv);
    var decoded = decipher.update(crypted, 'binary', 'utf8');
    decoded += decipher.final('utf8');
    return decoded;
};
 
var key = '751f621ea5c8f930';
console.log('加密的key:', key.toString('hex'));
var iv = '2624750004598718';
console.log('加密的iv:', iv);
var data = "Hello, nodejs. 演示aes-128-cbc加密和解密";
console.log("需要加密的数据:", data);
var crypted = encrypt(key, iv, data);
console.log("数据加密后:", crypted);
var dec = decrypt(key, iv, crypted);
console.log("数据解密后:", dec);

2、浏览器中使用

下载第三方库Crypto-js.js git地址：https://github.com/brix/crypto-js

引入src下的crypto-js.js，加密代码如下：

var key = "12345678"     //秘钥必须为：8/16/32位
var message = "123456";

//加密
var encrypt = CryptoJS.AES.encrypt(message, CryptoJS.enc.Utf8.parse(key), {
    mode: CryptoJS.mode.ECB,
    padding: CryptoJS.pad.Pkcs7
});
console.log("value: "+encrypt);

//解密
var decrypt = CryptoJS.AES.decrypt(encrypt, CryptoJS.enc.Utf8.parse(key), {
    mode: CryptoJS.mode.ECB,
    padding: CryptoJS.pad.Pkcs7
});
console.log("value: "+decrypt.toString(CryptoJS.enc.Utf8));

参考：

nodejs中aes-128-cbc加密和解密

nodejs与javascript中的aes加密