crypto.generateKeySync

type: 'hmac' | 'aes',

options: { length: number }

Synchronously generates a new random secret key of the given length. The type will determine which validations will be performed on the length.

const {
  generateKeySync,
} = await import('node:crypto');

const key = generateKeySync('hmac', { length: 512 });
console.log(key.export().toString('hex'));  // e89..........41e

The size of a generated HMAC key should not exceed the block size of the underlying hash function. See createHmac for more information.

@param type

The intended use of the generated secret key. Currently accepted values are 'hmac' and 'aes'.