throw new SmbException("Invalid token");
        }

        if ( spToken instanceof NegTokenTarg && this.mechContext.isEstablished() ) {
            // already established, but server hasn't completed yet
            NegTokenTarg targ = (NegTokenTarg) spToken;

            if ( targ.getResult() == NegTokenTarg.ACCEPT_INCOMPLETE && targ.getMechanismToken() == null && targ.getMechanismListMIC() != null ) {