@duncte123/obs-websocket-js/lib/util/authenticationHashing.js

Fork of obs ws v4 so I can create a bridge to v5

const SHA256 = require('sha.js/sha256');

/**
 * SHA256 Hashing.
 *
 * @param  {String} [salt=''] salt.
 * @param  {String} [challenge=''] challenge.
 * @param  {String} msg Message to encode.
 * @return {String} sha256 encoded string.
 */
// eslint-disable-next-line default-param-last
module.exports = function (salt = '', challenge = '', msg) {
  const hash = new SHA256()
    .update(msg)
    .update(salt)
    .digest('base64');

  const resp = new SHA256()
    .update(hash)
    .update(challenge)
    .digest('base64');

  return resp;
};