title: sharepoint as authentication provider
body: <p>Is it possible to use sharepoint as an authentication provider?</p>
  
  <p>This is my setup:</p>
  
  <p>Server A -> IIS web application loading custom dll's for different user providers</p>
  
  <p>Server B -> Sharepoint 2007</p>
  
  <p>Server C &amp; D -> Multiple AD's</p>
  
  <p>Sharepoint is configured to use multiple AD's as user provider</p>
  
  <p>This is what I want to achieve:</p>
  
  <p>A user enters his sharepoint credentials in the web application, this automaticly loads the dll (which I need to create)
  This dll then forwards the credentials somehow to sharepoint and retreives some sort of user object.
  The dll parses the sharepoint user object to it's own class and sends it back to the webapp.
  Is this possible? If yes, what would be the best way to do this? I know sharepoint has webservices etc but I don't know if this could work.</p>
  
  <p>All servers are in the same network, accessed locally so passing the credentials isn't a big problem.</p>