code: protected KeyStore loadKeyStore(char[] pw) throws VectorPrintException {
        try {
           return CertificateHelper.loadKeyStore(getValue(KEYSTORE, URL.class).openStream(),
               getValue(KEYSTORETYPE_PARAM, KEYSTORETYPE.class).name(), pw);
        } catch (IOException | KeyStoreException | NoSuchAlgorithmException | CertificateException ex) {
           throw new VectorPrintException(ex);
        }
     }
docs: loads a keystore using {@link #getSignKeystore() } and {@link #getKeystoretype() }, uses configured
  {@link #KEYSTORE_PASSWORD keystorepassword}.
  
  @return
  @throws VectorPrintException