var SecureRandom = require('../common/SecureRandom');

SecureRandom.getRandomBuffer = function(size) {
  if (!window.crypto && !window.msCrypto)
    throw new Error('window.crypto not available');

  if (window.crypto && window.crypto.getRandomValues)
    var crypto = window.crypto;
  else if (window.msCrypto && window.msCrypto.getRandomValues) //internet explorer
    var crypto = window.msCrypto;
  else
    throw new Error('window.crypto.getRandomValues not available');

  var bbuf = new Uint8Array(size);
  crypto.getRandomValues(bbuf);
  var buf = new Buffer(bbuf);

  return buf;
};

module.exports = SecureRandom;
