How to encrypt or decrypt string in javascript

Question

I want to encrypt and decrypt string in javascript using following code.But i got crypto js is not defined.

var encrypted = CryptoJS.AES.encrypt("Message", "Secret Passphrase");
var decrypted = CryptoJS.AES.decrypt(encrypted, "Secret Passphrase");

<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/aes.js"></script>

I placed your logic in a snippet where it appears to work (although the response appears to be objects not strings). Check to ensure you're including the crypto script in the page before you run your own logic. — Rory McCrossan
– Rory McCrossan, Commented May 21, 2018 at 12:58
You're not working with the responses from the method calls properly. See the AES section of the documentation about 2/3 of the way down this page: github.com/brix/crypto-js — Rory McCrossan
– Rory McCrossan, Commented May 21, 2018 at 13:00

Rory McCrossan · Accepted Answer · 2018-05-21 13:01:27Z

11

Works fine for me.

JSFiddle: https://jsfiddle.net/xbk736br/

// Encrypt
var ciphertext = CryptoJS.AES.encrypt('my message', 'secret key 123');

// Decrypt
var bytes = CryptoJS.AES.decrypt(ciphertext.toString(), 'secret key 123');
var plaintext = bytes.toString(CryptoJS.enc.Utf8);

console.log(plaintext);

<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/aes.js"></script>

edited May 21, 2018 at 13:01

Rory McCrossan

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answered May 21, 2018 at 13:00

Alex

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Comments

ajimae · Accepted Answer · 2019-08-28 00:34:48Z

If you are building a react or nodejs app, you can simply use this library ncrypt-js to encrypt and decrypt your data.

See example on codesandbox

usage:

es5

var ncrypt = require('ncrypt-js'); // or var { encrypt, decrypt } = require('ncrypt-js);

let encryptData = ncrypt.encrypt('super secret data', 'secret_key');
// or
// let encryptData = encrypt('super secret data', 'secret_key');

console.log(encryptData); // 11ab949601eb136f58ac3fe846e30d76.f9ce133b20adc35eef32af95957547abbb6fbfc5cb91cd14f5b0a088bd031883963cde1a56fd62fe2aeb75451a065d21
var decryptedData = ncrypt.decrypt(encryptData);
// or
// var decryptedData = decrypt(encryptData);

console.log(decryptedData); // super secret data

es6

import ncrypt from 'ncrypt-js'; // or import { encrypt, decrypt } from 'ncrypt-js';

const encryptData = ncrypt.encrypt('super secret data', 'secret_key');
// or
// const encryptData = encrypt('super secret data', 'secret_key');

console.log(encryptData); // 11ab949601eb136f58ac3fe846e30d76.f9ce133b20adc35eef32af95957547abbb6fbfc5cb91cd14f5b0a088bd031883963cde1a56fd62fe2aeb75451a065d21
const decryptedData = ncrypt.decrypt(encryptData);
// or
// const decryptedData = decrypt(encryptData);

console.log(decryptedData); // super secret data

Let Me Tink About It · Accepted Answer · 2020-03-04 21:01:53Z

2

encrypted.toString() will return the correct string value.

var encrypted = CryptoJS.AES.encrypt("Message", "Secret Passphrase");
alert(encrypted.toString());
var decrypted = CryptoJS.AES.decrypt(encrypted, "Secret Passphrase");

<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/aes.js"></script>

edited Mar 4, 2020 at 21:01

Let Me Tink About It

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answered May 21, 2018 at 12:58

Ankita

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2 Comments

Ankita Over a year ago

while encrypting? I am not getting any error actually.

Ankita Over a year ago

Double check whether your code is placed correctly in <script> tag

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