Lambda_PBKDF2_Test.js

const crypto = require('crypto');

exports.handler = async (event) => {
  const key = crypto.pbkdf2Sync(crypto.randomBytes(16), crypto.randomBytes(16), 35000, 32, 'sha512');

  return {
   "isBase64Encoded": false,
   "statusCode": 200,
   "headers": { },
   "body": key.toString('hex')
 }
};

Workers_PBKDF2_Test.js

addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request))
})

function buf2hex(buffer) {
  return Array.prototype.map.call(new Uint8Array(buffer), x => ('00' + x.toString(16)).slice(-2)).join('');
}

async function handleRequest(request) {
  const key = await crypto.subtle.importKey(
    "raw",
    crypto.getRandomValues(new Uint8Array(16)),
    {
        name: "PBKDF2",
    },
    false,
    ["deriveKey", "deriveBits"]
  )

  var resp = await crypto.subtle.deriveBits({
      name: "PBKDF2",
      salt: crypto.getRandomValues(new Uint8Array(16)),
      iterations: 35000,
      hash: {name: "SHA-512"}},
    key,
    256
  ) 

  return new Response(buf2hex(resp))
}