title: How to add padding on to a byte array?
body: <p>I have this <strong>40 bit</strong> key  in a <code>byteArray</code> of size <strong>8</strong>, and I want to add 0 padding to it until it becomes <strong>56 bit</strong>. </p>
  
  <pre><code>byte[] aKey = new byte [8];  // How I instantiated my byte array
  </code></pre>
  
  <p>Any ideas how?</p>