How to create fixed digit crypto key using Node.js Crypto

Question

I am new to this, but my requirement is that I want 20 characters long crypto key using Node.js Crypto module.

I tried but could not get fixed length key.

Can anyone please help me.

Thanks in advance.

Answer 1

You can use crypto.randomBytes to generate keys, for example:

const crypto = require('crypto');

const key = crypto.randomBytes(10).toString('hex');
console.log(`key: ${key} length: ${key.length}`);

You can also use the crypto.scrypt function to derive a fixed-length key from a longer passphrase:

const crypto = require('crypto');

const key = crypto.scryptSync('my secret pass phrase', 'my salt', 10).toString('hex');
console.log(`key: ${key} length: ${key.length}`);