How to decryption data in browser side which is encrypted on nodejs crypto lib?

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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;

Above is my node js code...

Please guide me how to decrypt the return data in browser. I hate tryed the following but it was give some wrong output.

<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}
});

I think node's CryptoJS is not directly compatible with node's crypto module. So the easiest way is to use CryptoJS on both sides.

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;

And within the browser you have to to encode the decrypted object

<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
});

BTW:

A year ago i wrote little helpers to encode and decode between node and browser.

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

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

Encrypt And Decrypt Data In Node.js With The Crypto Library, How to decryption data in browser side which is encrypted on nodejs crypto lib? - angularjs. <p>Node.js provides built-in library called &#8216;crypto&#8217; which you can use to perform cryptographic operations on data. You can do cryptographic operations on strings, buffer, and streams. In this article, we will go through some examples of how you can do these operations in your project. You can use multiple crypto algorithms. Check out the official [&hellip;]</p>

CryptoJS supports the same KDF function as the crypto module in node, but when the password-based encrypt call is used a random salt is generated whereas node doesn't use a salt at all. The other parameters are the same: hash is MD5 and only 1 iteration is used.

(untested) code:

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);

Stronger Encryption and Decryption in Node.js � GitHub, Learn how to encrypt and decrypt sensitive data such as passwords and private keys within a Node.js application using the Crypto library. I have been hard pressed to discover an example of how to use a publicKey sent to a Browser to the be able to decrypt in node what was encrypted in the browser with the nodejs crypto generate KeyPair's PublicKey.

Encryption and decryption of JSON object node and html

Node 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);

At browser side- 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))

Encrypt and Decrypt Data in Node.js, Do you see any way to cipher some data on one server running on PHP then deciphering it in Node using at Object.decrypt (/var/www/html/server/lib/hash.js: 20:25) how to Encryption in Node js and Decryption in browser (client Side) ? JavaScript Encrypt & Decrypt, Simple Encryption and Decryption Program in JS. When we sign up or register on a website they store our information in their database like MySQL, MongoDB, etc. But they store data in an encrypted form, not ordinary text form. Because if store our information in a normal text form, there will be chances of hacking.

How to encrypt data in browser with JavaScript and decrypt on , Node.js provides built-in library called 'crypto' which you can use to perform cryptographic operations on data. You can do cryptographic operations on strings,� plain text = convert a byte array to a string using UTF-8 encoding ( decrypt with AES-128 ( Secret Key, described above initial vector, that is your application's data decryption key, converted as a hexadecimal number to a byte array, encrypted text that must be decrypted, converted as a base64 string to a byte array ) )

In short, key is not same for crypto when decrypting. Use a 32 bytes key like abcabcabc1abcabcabc1abcabcabc132. Go for client-side encryption� ShortCrypt is a very simple encryption library, which aims to encrypt any data into something random at first glance v 1.0.23 170 no-std # crypto # qrcode # url # encrypt # decrypt ursa

Hello, in order to achieve this it should be considered to use the key and iv with 32 hex digits each, i had to solve exactly this doing my stuff and here is the way it goes

Comments
  • This is semi-unrelated, but why are you doing this in the browser in the first place?
  • To expand on @mscdex question, how is the client getting your decryption key?
  • Above CDN is removed by Google, Please let me know another reliable CDN available.
  • cdn.jsdelivr.net/npm/crypto-js@3.1.9-1/crypto-js.js This is working CDN.