Random bytes and bits for Node.js #javascript #typescript

random_bytes_bits.ts

import crypto from 'crypto';

/**
 * Gets random bytes as Uint8Array
 */
function randomBytes(size: number): Uint8Array {
  return crypto.randomBytes(size);
}

/**
 * Gets random bit string
 */
function randomBits(size: number): string {
  const bytes = randomBytes(Math.ceil(size / 8));
  const bits = [...bytes].map((n) => dec2bin(n, 8)).join('');
  return bits.substr(0, size);
}