* authentication via exchange of private/public keys and private key was used for authentication.
     *
     * @return passphrase of the private key file
     */
    public String getPassphrase() {
        return passphrase;
    }

    /**
     * Set the passphrase of the private key file.
     *
     * @param passphrase passphrase of the private key file
     */

                            authInfo.setPassword(server.getPassword());
                            authInfo.setPrivateKey(server.getPrivateKey());
                            authInfo.setPassphrase(server.getPassphrase());

                            return authInfo;
                        }
                    }
                }
            }
        }

        // empty one to prevent NPE