node中的密碼安全(加密)

const NodeRSA = require('node-rsa')
const fs = require('fs')

// Generate new 512bit-length key
var key = new NodeRSA({b: 512})
key.setOptions({encryptionScheme: 'pkcs1'})

var privatePem = key.exportKey('pkcs1-private-pem')
var publicDer = key.exportKey('pkcs8-public-der')
var publicDerStr = publicDer.toString('base64')

// 保存返回到前端的公鑰
fs.writeFile('./pem/public.pem', publicDerStr, (err) => {
 if (err) throw err
 console.log('公鑰已保存！')
})
// 保存私鑰
fs.writeFile('./pem/private.pem', privatePem, (err) => {
 if (err) throw err
 console.log('私鑰已保存！')
})

 <script src="https://cdn.bootcss.com/jsencrypt/2.3.1/jsencrypt.min.js"></script>
 <script src="https://cdn.bootcss.com/axios/0.18.0/axios.min.js"></script>
 <script>
 function reg() {
 axios({
 method: 'post',
 url: 'http://127.0.0.1:3000/getPublicKey'
 })
 .then(res => {
 let result = res.data

 // 從后端獲取的公鑰 String
 var publicPem = result
 // 用JSEncrypt對(duì)密碼進(jìn)行加密
 var encrypt = new JSEncrypt()
 encrypt.setPublicKey(publicPem)
 var password = 'abc123'
 password = encrypt.encrypt(password)

 axios({
 method: 'post',
 url: 'http://127.0.0.1:3000/reg',
 data: {
 password: password
 }
 })
 .then(res => {
 let result = res.data
 console.log(result)
 })
 .catch(error => {
 console.log(error)
 })
 })
 }
 </script>

const express = require('express');
const crypto = require('crypto');
const fs = require('fs');

var privatePem = fs.readFileSync('./pem/private.pem');

var app = express();
app.use(express.json());

// CORS 注意：要放在處理路由前
function crossDomain(req, res, next) {
 res.header('Access-Control-Allow-Origin', '*');
 res.header('Access-Control-Allow-Headers', 'Content-Type');

 next();
}
app.use(crossDomain)

app.use(function (req, res, next) {
 // 不加會(huì)報(bào)錯(cuò)
 if (req.method === 'OPTIONS') {
 res.end('ok')
 return
 }

 switch (req.url) {
 case '/getPublicKey':
 let publicPem = fs.readFileSync('./pem/public.pem', 'utf-8')
 res.json(publicPem)
 break
 case '/reg':
 // 解密
 var privateKey = fs.readFileSync('./pem/private.pem', 'utf8')
 var password = req.body.password
 var buffer2 = Buffer.from(password, 'base64')
 var decrypted = crypto.privateDecrypt(
 {
 key: privateKey,
 padding: crypto.constants.RSA_PKCS1_PADDING // 注意這里的常量值要設(shè)置為RSA_PKCS1_PADDING
 },
 buffer2
 )
 console.log(decrypted.toString('utf8'))

 // sha1加密
 var sha1 = crypto.createHash('sha1');
 var password = sha1.update(decrypted).digest('hex');
 console.log('輸入到數(shù)據(jù)庫(kù)中的密碼是: ', password)
 // 存入數(shù)據(jù)庫(kù)中
 // store to db...
 res.end('reg ok')
 break
 }
})

app.listen(3000, '127.0.0.1')