kerberosnamecreator.java

java kerberos implementation

/*
  Simple Implementation of Kerberos protocol v5
  Copyright (C) 2003 Thia Yeo Ching ([e-mail])

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License
  as published by the Free Software Foundation; either version 2
  of the License, or (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
package SimpleKerberos.guitool;

import SimpleKerberos.IAuthenticationService;
import SimpleKerberos.AuthenticationServiceFactory;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;


public class KerberosNameCreator extends JFrame
  implements ActionListener
{
  public static final String TITLE = "Kerberos Name Creator";
  private JLabel nameLabel;
  private JLabel hostLabel;
  private JLabel pwdLabel;
  private JLabel retypeLabel;
  private JTextField hostText;
  private JTextField nameText;
  private JPasswordField pwdText;
  private JPasswordField retypeText;
  private JButton okButton;
  private StatusArea statusArea;

  private static final String ELLIPSIS = "...";
  private static final String RETYPE_PWD = "Please retype your password twice exactly";
  private static final String EMPTY = "";

  public static void main(String args[])
  {
    new KerberosNameCreator().setVisible(true);
  }

  public KerberosNameCreator()
  {
    super(TITLE);
    hostLabel = new JLabel("Kerberos Host Name");
    nameLabel = new JLabel("Name");
    pwdLabel = new JLabel("Password");
    retypeLabel = new JLabel("Retype Password");
    hostText = new JTextField();
    nameText = new JTextField();
    pwdText = new JPasswordField();
    retypeText = new JPasswordField();
    okButton = new JButton("OK");
    statusArea = new StatusArea();


    LayoutManager detailsLayout = new GridLayout(4, 2);
    Container detailsPane = new Container();
    detailsPane.setLayout(detailsLayout);
    detailsPane.add(hostLabel);
    detailsPane.add(hostText);
    detailsPane.add(nameLabel);
    detailsPane.add(nameText);
    detailsPane.add(pwdLabel);
    detailsPane.add(pwdText);
    detailsPane.add(retypeLabel);
    detailsPane.add(retypeText);

    LayoutManager contentLayout = new GridLayout(3, 1);
    Container contentPane = this.getContentPane();
    contentPane.setLayout(contentLayout);
    contentPane.add(detailsPane);
    contentPane.add(okButton);
    contentPane.add(statusArea);

    okButton.addActionListener(this);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    this.pack();
  }


  private boolean checkIdenticalPassword()
  {
    if ((pwdText.getPassword().length > 0 && retypeText.getPassword().length > 0)
      &&
      (new String(pwdText.getPassword()).equals(new String(retypeText.getPassword()))))
    {
      return true;
    }

    statusArea.appendStatus(RETYPE_PWD);
    pwdText.setText(EMPTY);
    retypeText.setText(EMPTY);
    return false;
  }

  public void actionPerformed(ActionEvent e)
  {
    if (e.getSource() == okButton)
    {
      statusArea.clearStatus();
      if (checkDetails())
      {
        createKerberosName(hostText.getText(), nameText.getText(), new String(pwdText.getPassword()));
      }
    }
  }

  private boolean checkName()
  {
    if (nameText.getText().length() > 0)
    {
      return true;
    }

    statusArea.appendStatus("Please enter your name");
    return false;
  }
  private boolean checkHost()
  {
    if (hostText.getText().length() > 0)
    {
      return true;
    }

    statusArea.appendStatus("Please enter your host");
    return false;
  }

  private boolean checkDetails()
  {
    boolean c1 = checkIdenticalPassword();
    boolean c2 = checkName();
    boolean c3 = checkHost();

    return c1 && c2 && c3;
  }

  private boolean do_createKerberosName(IAuthenticationService auth,
    String name, String pwd)
  {
    try
    {
      if (auth.createName(name, pwd))
      {
        return true;
      }

      statusArea.appendStatus("name "+name+" existed, cannot create again.");
    }
    catch (Exception e)
    {
      statusArea.appendStatus(e.toString());
      e.printStackTrace();
    }
    return false;
  }

  private void createKerberosName(String host, String name, String pwd)
  {
    statusArea.appendStatus("Contacting host " + host +  ELLIPSIS);
    // assuming that the services are running
    IAuthenticationService auth = AuthenticationServiceFactory.getRemoteInstance(host);
    if (auth != null)
    {
        if (do_createKerberosName(auth, name, pwd))
        {
          statusArea.appendStatus("name successfully created");
        }
        return;
    }

    //clearStatus();
    statusArea.appendStatus("failed to contact host " + host);

  }
}