How to use node-js crypto in javascript?

Question

I need following encryption decryption, but in java script for client-side. This code is written in Node-JS and using crypto library, i couldn't find same solution for java script for client side run.

const crypto = require('crypto');

const decrypt = (textBase64, keyBase64, ivBase64) => {
    const algorithm = 'aes-256-cbc';
    const ivBuffer = Buffer.from(ivBase64, 'base64');
    const keyBuffer = Buffer.from(keyBase64, 'base64');

    const decipher = crypto.createDecipheriv(algorithm, keyBuffer, ivBuffer);
    decipher.setAutoPadding(false);

    let decrypted = decipher.update(textBase64, 'base64', 'utf8');
    decrypted += decipher.final('utf8');
    return decrypted;
}

const encryptedMessage = '';


const key = 'cGFzc3dvcmQxMjM0NTY3ODk=';

const iv = Buffer.from(encryptedMessage, 'base64').slice(0, 16);

// the message comes from the bytes AFTER the IV - this is what you should decrypt
const message = Buffer.from(encryptedMessage, 'base64').slice(16);

const result = decrypt(message, key, iv);
console.log(result);
//console.log(Buffer.from(encryptedMessage, 'base64').slice(0, 16))

tsamaya · Accepted Answer · 2020-06-10 09:23:13Z

1

First I would say it is not recommended to decrypt on the client side as the key is visible. but you know what you do.

this library is pure JS and should be working in a browser without any pain : ricmoo/aes-js

answered Jun 10, 2020 at 9:23

tsamaya

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2 Comments

Jay seen Over a year ago

ok, thanks, may be i am missing something.. because i m getting crypto not found

tsamaya Over a year ago

what do you mean ? crypto is a built-in within node. library with the link in answer does not use crypto

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