如何在浏览器端解密在 nodejs 加密库上加密的数据？

Question

var express = require('express');
var router = express.Router();
var crypto = require('crypto');

/* GET home page. */
router.get('/', function(req, res) {
    res.render('index', { title: 'Express' });
});

router.get('/data', function(req, res) {
    var cipher = crypto.createCipher('aes256', 'pass');
    var data = 'myMessage';
    cipher.update(data, 'utf8','hex');
    var cip = cipher.final('hex');
    console.log("Encrypted data = " + cip); // output : Encrypted data = ac56181551e250293a60b19377583462
    res.send(cip);
});

module.exports = router;

以上是我的node js代码...

请指导我如何在浏览器中解密 return 数据。我讨厌尝试以下操作，但它给出了一些错误的输出。

<script src="http://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/aes.js"></script>

...

http.get('/data').success(function(en){
    console.log('data = ' + en);
    var decrypted = CryptoJS.AES.decrypt(en, "pass");
    data = decrypted;  // output : {"words":[1554796213,1611862464,1270695700,366896005,1827398142,-336097742,936488021,959734499],"sigBytes":-26}
});

Answer 1

我认为节点的 CryptoJS 与节点的加密模块不直接兼容。所以最简单的方法就是两边都用CryptoJS。

var express = require('express');
var router = express.Router();

var CryptoJS = require('node-cryptojs-aes').CryptoJS;

/* GET home page. */
router.get('/', function(req, res) {
    res.render('index', { title: 'Express' });
});

router.get('/data', function(req, res) {
    var data = 'myMessage';
    var cip = CryptoJS.AES.encrypt(data, "pass").toString();
    console.log("Encrypted data = " + cip); // output : Encrypted data = U2FsdGVkX1/sgjVtKYMdH9lzLm3X48+kpS2eRToWlfM=
    res.send();
});

module.exports = router;

并且在浏览器中你必须对解密的对象进行编码

<script src="http://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/aes.js"></script>

...

http.get('/data').success(function(en){
    console.log('data = ' + en);
    var decrypted = CryptoJS.AES.decrypt(en, "pass");
    data = CryptoJS.enc.Utf8.stringify(decrypted);
    console.log( data );  // output : myMessage
});

顺便说一句：

一年前我写了一些小助手来在节点和浏览器之间进行编码和解码。

服务器：https://github.com/mpneuried/gmail-s3-diary/blob/master/_src/lib/json-aes.coffee

浏览器：https://github.com/mpneuried/gmail-s3-diary/blob/master/_src_template/js/lib/jsonaes.coffee

Answer 2

CryptoJS 支持与节点中的加密模块相同的 KDF 功能，但是当使用基于密码的加密调用时会生成随机盐，而节点根本不使用盐。其他参数相同：hash为MD5，只使用1次迭代

（未测试）代码：

var keySize = 256/32,
    ivSize = 128/32,
    key = CryptoJS.algo.EvpKDF.create({ keySize: keySize + ivSize })
            .compute(password /*, salt*/);

// Separate key and IV
var iv = CryptoJS.lib.WordArray.create(key.words.slice(keySize), ivSize * 4);
key.sigBytes = keySize * 4;

// decrypt
var ct = CryptoJS.enc.Hex.parse(ciphertext),
    decrypted = CryptoJS.AES.decrypt(ct, key, { iv: iv }),
    data = CryptoJS.enc.Utf8.stringify(decrypted);

Answer 3

JSON对象节点和html

的加密解密

节点JS

var CryptoJS = require('node-cryptojs-aes').CryptoJS;

var data = {
  "glossary": {
  "title": "example glossary",
  }
}

var cip = CryptoJS.AES.encrypt(JSON.stringify(data), "pass").toString();
console.log("Encrypted data = " + cip);

在浏览器端- HTML CDN-“https://cdn.jsdelivr.net/npm/crypto-js@3.1.9-1/crypto-js.js”

var decrypted =     CryptoJS.AES.decrypt('U2FsdGVkX1/ps2tRPpM+5elyGhaT7zpp3YL45esS57GmSLoCkhcRdJDBGPUy    uvt0tf4CY6lW2+kugXocBQkc6A==', "pass");
    data = CryptoJS.enc.Utf8.stringify(decrypted)
    console.log("decrypted", JSON.parse(data))

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