title: Can we detect if a root CA certificate is installed?
body: <p>Is this possible with JavaScript or PHP? I want to be able to detect if my private CA is installed on the user's iOS or Android device. From there I can decide whether to provide instructions for installation or not. I've been "googlin" and haven't found anything useful. Has anyone tried this before? I want to find out what I should spend my time learning. If it's not possible, could you suggest an in browser alternative?</p>
  
  <p><strong>EDIT :</strong> I don't have a choice here and it's not my decision. A private CA certificate is going to be used for other security reasons.</p>