HKDF for Node.js and Browsers

Small package exporting a HKDF function that works both in Node.js and in browsers.

Installation

npm install --save @ctrlpanel/hkdf

Usage

const hkdf = require('@ctrlpanel/hkdf')

const salt = Buffer.from('salt')
const password = Buffer.from('super secret')
const info = Buffer.from('@ctrlpanel/hkdf')

hkdf(salt, password, info, 32, 'SHA-512').then((result) => {
  console.log(result)
  //=> ArrayBuffer { byteLength: 32 }
})

API

hkdf(salt, input, info, keylen, digest) => ArrayBuffer

• salt: ArrayBuffer | Uint8Array | Buffer - The salt used when deriving, a non-secret random value
• input: ArrayBuffer | Uint8Array | Buffer - The input key material to base the derivation on
• info: ArrayBuffer | Uint8Array | Buffer - Context and application specific information
• keylen: number - Byte length of output key
• digest: 'SHA-256' | 'SHA-384' | 'SHA-512' - Hash algorithm to use

Derive a key from input, and return it as an ArrayBuffer.