simple-pkce-browser

PKCE HMAC or hash SHA256 base64 challenge & verifier generator for any browser (using fast-sha256)

Installation

npm i simple-pkce-browser

Usage

Library exports single function - createPKCEHelper(isHMAC = true)

This function returns object with two methods on it:

• getChallenge(verifier: string) => string - for getting challenge from verifier
• generateChallenge(verifierLength: number) => PKCEChallenge - generates verifier of given length and returns PKCEChallenge:

interface PKCEChallenge {
    verifier: string;
    challenge: string;
}

Examples

if you need SHA256 base64 HMAC challenge:

import { createPKCEHelper, PKCEChallenge, PKCEHelperLegacyBrowser } from 'simple-pkce-browser'

const VERIFIER_LENGTH = 64
const { generateChallenge, getChallenge }: PKCEHelperLegacyBrowser = createPKCEHelper()
const { verifier, challenge }: PKCEChallenge = generateChallenge(VERIFIER_LENGTH)

if you need SHA256 base64 hash you do exactly the same, but need to pass false as the first parameter to createPKCEHelper():

import { createPKCEHelper, PKCEChallenge, PKCEHelperLegacyBrowser } from 'simple-pkce-browser'

const VERIFIER_LENGTH = 64
const { generateChallenge, getChallenge }: PKCEHelperLegacyBrowser = createPKCEHelper(false)
const { verifier, challenge }: PKCEChallenge = generateChallenge(VERIFIER_LENGTH)