simple Node.js CSPRNG

.js

/**
 * Dependencies
 */

import { inRange } from 'lodash'
import { randomBytes } from 'crypto'

/**
 * CSPRNG
 * Generates numbers between start and up to but not including, end
 * @param {number} start - start of range, min: 0
 * @param {number} end - end of range, max: 255
 */

function random (start, end) {
  const rand = randomBytes(1)[0]
  return inRange(rand, start, end)
    ? rand
    : random(start, end)
}