Function getSecureRandom

src/modules/crypto.js:59–66

(from, to)

 * @return {Number} - a secure random number
 */
export function getSecureRandom(from, to) {
  let randUint = getSecureRandomUint();
  const bits = ((to - from)).toString(2).length;
  while ((randUint & (Math.pow(2, bits) - 1)) > (to - from)) {
    randUint = getSecureRandomUint();
  }
  return from + (Math.abs(randUint & (Math.pow(2, bits) - 1)));
}

function getSecureRandomUint() {
  const buf = new Uint8Array(4);