[Node.js] rsa&aes 加密解密

默认加解密方式

'use strict';

const express = require('express')
const bodyParser = require('body-parser')
var crypto = require('crypto');
var NodeRSA = require('node-rsa');

// 创建服务器
const app = express()

// 初始化 bodyParser
app.use(bodyParser.urlencoded({ extend: false }));
app.use(bodyParser.json());

// aes 加密解密
function aesEncrypt(data, key) {
    const cipher = crypto.createCipher('aes-128-cbc', key);
    var crypted = cipher.update(data, 'utf8', 'hex');
    crypted += cipher.final('hex');
    return crypted;
}
function aesDecrypt(encrypted, key) {
    const decipher = crypto.createDecipher('aes-128-cbc', key);
    var decrypted = decipher.update(encrypted, 'hex', 'utf8');
    decrypted += decipher.final('utf8');
    return decrypted;
}

// rsa 加密解密
const key = new NodeRSA({ b: 512 })                          // 512 密钥长度
key.setOptions({ encryptionScheme: 'pkcs1' })         // 指定加密格式
//var publicDer = key.exportKey('public')                      // 公钥
//var privateDer = key.exportKey('private')                   // 私钥
function rsaEncrypt(data) {

    return key.encrypt(data, 'base64')
}
function rsaDecrypt(data) {

    return key.decrypt(data, 'utf8')
}



// 测试加密
app.post('/aesEncrypt', async (req, res) => {

    res.send(aesEncrypt(req.body.data, req.body.key))

})
app.post('/rsaEncrypt', async (req, res) => {

    res.send(rsaEncrypt(req.body.data))

})

// 测试解密
app.post('/aesDecrypt', async (req, res) => {

    res.send(aesDecrypt(req.body.data, req.body.key))

})
app.post('/rsaDecrypt', async (req, res) => {

    res.send(rsaDecrypt(req.body.data))

})

// 处理 404 页面
app.use((req, res, next) => {
    res.status(404).send('404 not found')
})

// 监听端口
app.listen(3000, () => {
    console.log('server start ...')
})

---

效果图

aes：

---

rsa：

---

使用已知的密钥加解密（RSA）

	var rsaPublicKey = new NodeRSA(
        '-----BEGIN PUBLIC KEY-----\n' + 
        'MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAL+JFgh+DyMJWWHNHaGgDyS6PWIMnR9w\n' +
        '6U4qKPiJX9YcNTQx7wD7SsM0/jZj0nQOhyvhfy+rj3qG97erfsQLa9cCAwEAAQ==\n' +
        '-----END PUBLIC KEY-----'
    )
    var rsaPrviteKey = new NodeRSA(
        '-----BEGIN RSA PRIVATE KEY-----\n' +
        'MIIBOwIBAAJBAL+JFgh+DyMJWWHNHaGgDyS6PWIMnR9w6U4qKPiJX9YcNTQx7wD7\n' +
        'SsM0/jZj0nQOhyvhfy+rj3qG97erfsQLa9cCAwEAAQJAAXPXr+7MzJY4kE5O6Dff\n' +
        'hYbICmNQGbnwewBE2UWpbWU7+gxRuuLA3N2AgrITC+tFUbp/dvjzkXxehZzQD7RD\n' +
        'yQIhAP4+yjKPUqQ/AbmgsITyZkQ7eB3epIkYJ1O7OM3AcwxbAiEAwNt/i2efgiQ0\n' +
        'np+zb4F+apn4ecxvT01JfNk/3Y+IJzUCIBOeQrnuB0F3PynUtWo8zhlbwWQEpwuR\n' +
        'Go/CdZqiy/3bAiEAiPygiQ3OwCslcTKwythpSiEZ3LH4spSMSXErKx5jsK0CIQCD\n' +
        '2ZrIVjgWLwNCsHtAreZmiyyPmflqcKuxd9VbiRhwig==\n' +
        '-----END RSA PRIVATE KEY-----'
    )
    const encrypted = rsaPublicKey.encrypt('123456', 'base64')
    console.log(encrypted)
    const decrypted = rsaPrviteKey.decrypt(encrypted, 'utf8')
    console.log(decrypted)

---

补充：crypto-js 的 aes 加解密

// aes js 加密
function aesEncryptJs(data, key){
    
    const cipher = CryptoJS.AES.encrypt(data, CryptoJS.enc.Utf8.parse(key), {
        mode: CryptoJS.mode.ECB,
        padding: CryptoJS.pad.Pkcs7,
        iv: "",
    });

    const resultCipher = cipher.ciphertext.toString(CryptoJS.enc.Base64);

    return resultCipher;
}

// aes js 解密
function aesDecryptJs(encrypted, key){

    const decipher = CryptoJS.AES.decrypt(encrypted, CryptoJS.enc.Utf8.parse(key), {
        mode: CryptoJS.mode.ECB,
        padding: CryptoJS.pad.Pkcs7,
        iv: "",
    });

    const resultDecipher = CryptoJS.enc.Utf8.stringify(decipher);

    return resultDecipher;
}