randombytes.js

function getRandomValues(byteArray) {
	var i = 0;
	for (i = 0; i < byteArray.length; i++) {
		byteArray[i] = Math.floor(256 * Math.random());
	}
}
function randomBytes(size, cb) {
	// phantomjs needs to throw
	if (size > 65536) throw new Error('requested too many random bytes');
	// in case browserify  isn't using the Uint8Array version
	var rawBytes = new global.Uint8Array(size);

	// This will not work in older browsers.
	// See https://developer.mozilla.org/en-US/docs/Web/API/window.crypto.getRandomValues
	if (size > 0) {
		// getRandomValues fails on IE if size == 0
		getRandomValues(rawBytes);
	}
	// XXX: phantomjs doesn't like a buffer being passed here
	var bytes = Buffer.from(rawBytes.buffer);

	if (cb) {
		cb(bytes);
	}
	return bytes;
}
module.exports = randomBytes;