Access Challenge Response throws PAPAuthenticator into a loop

[Sovietaced]

Hi all, while doing some work with the RSA RADIUS server I noticed that under some circumstances it would return an Access Challenge Response (new PIN mode, next token code mode). Currently the PAPAuthenticator (and I think anything besides the EAPAuthenticator) will end up looping indefinitely.

public RadiusResponse authenticate(AccessRequest p, RadiusAuthenticator auth, int retries)
    	throws RadiusException, UnknownAttributeException, NoSuchAlgorithmException
    {
        if (auth == null) auth = new PAPAuthenticator();

        auth.setupRequest(this, p);
        auth.processRequest(p);

        while (true)
        {
            RadiusResponse reply = transport.sendReceive(p, retries);

            if (reply instanceof AccessChallenge)
            {
                auth.processChallenge(p, reply);
            }
            else
            {
                return reply;
            }
        }
    }