NovaClient.java :  » Game » settlers-of-catan » ssh » Java Open Source

package ssh;

import com.jcraft.jsch.*;
import java.awt.*;
import javax.swing.*;
import log.Logger;
import log.Logger.OutputType;

public class NovaClient {

  public static final String nova = "nova.cs.tau.ac.il";
  protected Session mSession = null;

  public static void main(String[] args) {
    new NovaClient(true);
  }

  public NovaClient(boolean redirectIO) {
    try {
      JSch jsch = new JSch();
      String user = JOptionPane.showInputDialog(null, "Enter nova username:", nova + " username", JOptionPane.QUESTION_MESSAGE);
      mSession = jsch.getSession(user, nova, 22);
      UserInfo ui = new MyUserInfo();
      mSession.setUserInfo(ui);
      mSession.connect();
      if (redirectIO) {
        Channel channel = null;
        channel = mSession.openChannel("shell");
        channel.setInputStream(System.in);
        channel.setOutputStream(System.out);
        channel.connect();
      }
    } catch (Exception e) {
      Logger.println("Failed to connect to " + nova, OutputType.ERROR);
    }
  }

  public void close() {
    mSession.disconnect();
  }

  public static class MyUserInfo implements UserInfo, UIKeyboardInteractive {
    public String getPassword() {
      return password;
    }

    public boolean promptYesNo(String str) {
/* choose whether to authorize this unknown host or not
      Object[] options = {"yes", "no"};
      int foo = JOptionPane.showOptionDialog(null, str, "Warning", JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE, null, options, options[0]);
      return foo == 0;
*/
      return true;
    }

    String password;
    JTextField passwordField = (JTextField) new JPasswordField(20);

    public String getPassphrase() {
      return null;
    }

    public boolean promptPassphrase(String message) {
      return false;
    }

    public boolean promptPassword(String message) {
      Object[] ob = {passwordField};
      int result = JOptionPane.showConfirmDialog(null, ob, message, JOptionPane.OK_CANCEL_OPTION);
      if (result == JOptionPane.OK_OPTION) {
        password = passwordField.getText();
        return true;
      } else {
        return false;
      }
    }

    public void showMessage(String message) {
      JOptionPane.showMessageDialog(null, message);
    }

    final GridBagConstraints gbc = new GridBagConstraints(0, 0, 1, 1, 1, 1, GridBagConstraints.NORTHWEST, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0);
    private Container panel;

    public String[] promptKeyboardInteractive(String destination, String name, String instruction, String[] prompt, boolean[] echo) {
      panel = new JPanel();
      panel.setLayout(new GridBagLayout());

      gbc.weightx = 1.0;
      gbc.gridwidth = GridBagConstraints.REMAINDER;
      gbc.gridx = 0;
      panel.add(new JLabel(instruction), gbc);
      gbc.gridy++;

      gbc.gridwidth = GridBagConstraints.RELATIVE;

      JTextField[] texts = new JTextField[prompt.length];
      for (int i = 0; i < prompt.length; i++) {
        gbc.fill = GridBagConstraints.NONE;
        gbc.gridx = 0;
        gbc.weightx = 1;
        panel.add(new JLabel(prompt[i]), gbc);

        gbc.gridx = 1;
        gbc.fill = GridBagConstraints.HORIZONTAL;
        gbc.weighty = 1;
        if (echo[i]) {
          texts[i] = new JTextField(20);
        } else {
          texts[i] = new JPasswordField(20);
        }
        panel.add(texts[i], gbc);
        gbc.gridy++;
      }

      if (JOptionPane.showConfirmDialog(null, panel, destination + ": " + name, JOptionPane.OK_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE) == JOptionPane.OK_OPTION) {
        String[] response = new String[prompt.length];
        for (int i = 0; i < prompt.length; i++) {
          response[i] = texts[i].getText();
        }
        return response;
      } else {
        return null; // cancel
      }
    }
  }
}