title: Login flow : WSSE Authentication & Facebook Sign in
body: <p>I am playing with WSSE Authentication (through Symfony2) and I have defined the following classic Login flow : </p>
  
  <ol>
  <li>User enters its username &amp; password &amp; get the associated salt from the server</li>
  <li>username &amp; password are checked on  the server (ajax call) through a WSSE header check</li>
  <li>If Credentials are valid then, required data (i.e data that allow to re-generate a WSSE Header at each request) is stored on the browser</li>
  </ol>
  
  <p>This is fully working.</p>
  
  <p>Now, I would like to add the "Signin with facebook" feature. That's not a problem there's plenty of documentation on it, BUT, my purpose &amp; my difficulty is to keep the WSSE logical working</p>
  
  <p>As the user never enters its password if he logs in with Facebook, I am unable to generate wsse headers, and for this there is no documentation at all.</p>
  
  <p>Would someone have already dealt with such an operation? Thanks in advance</p>