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 nsIProtectedAuthThread
  This is used to communicate with the thread login on to 
  a token with CKF_PROTECTED_AUTHENTICATION_PATH set.
[scriptable, uuid(4bb27cb7-8984-4cee-8ce7-9b014c3d091b)]
interface nsIProtectedAuthThread : nsISupports

Attributes

 The PKCS11 slot
readonly attribute nsIPKCS11Slot slot

Methods

 Gets token to be logged in name.
AString getTokenName() 
 login - run the thread
   A user interface implementing this interface needs to
   call this method as soon as the message to the user is
   displayed. This will trigger login operation. No user 
   cancellation is possible during login operation.

   When the login is done, the observe method of @observer will
   be called on the UI thread with a topic of "login-finished"
   and null data and subject.
void login(in nsIObserver observer)