}
        try {
            NegTokenInit tok = new NegTokenInit(initialToken);
            if ( log.isDebugEnabled() ) {
                log.debug("Have initial token " + tok);
            }
            if ( tok.getMechanisms() != null ) {
                Set<ASN1ObjectIdentifier> mechs = new HashSet<>(Arrays.asList(tok.getMechanisms()));
                boolean foundKerberos = false;