Establishing the connection through the SSH using the Java:
import com.jcraft.jsch.*;
import java.awt.*;
import javax.swing.*;
import java.io.*;
public class Exec {
public static void main(String[] arg) {
try {
JSch jsch = new JSch();
String host = null;
if (arg.length > 0) {
host = arg[0];
} else {
// Need to provide the UserName and HostName: Eg,
// root@192.168.0.33
host = JOptionPane.showInputDialog("Enter username@hostname",
System.getProperty("user.name") + "@localhost");
}
String user = host.substring(0, host.indexOf('@'));
host = host.substring(host.indexOf('@') + 1);
Session session = jsch.getSession(user, host, 22);
UserInfo ui = new MyUserInfo();
// session.setPassword("*******");
session.setUserInfo(ui);
session.connect();
String c = null;
Channel channel = null;
do {
channel = session.openChannel("exec");
// Enter the command to execute: Eg: ls, cd.. etc
String command = JOptionPane.showInputDialog("Enter command",
"set|grep SSH");
exec_Command(channel, session, command);
c = JOptionPane.showInputDialog("Wish to /cont");
} while (c.equalsIgnoreCase("YES"));
channel.disconnect();
session.disconnect();
} catch (Exception e) {
System.out.println(e);
}
}
public static class MyUserInfo implements UserInfo, UIKeyboardInteractive {
public String getPassword() {
return passwd;
}
public boolean promptYesNo(String str) {
Object[] options = { "yes", "no" };
int foo = JOptionPane.showOptionDialog(null, str, "Warning",
JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE,
null, options, options[0]);
return foo == 0;
}
String passwd;
JTextField passwordField = (JTextField) new JPasswordField(20);
public String getPassphrase() {
return null;
}
public boolean promptPassphrase(String message) {
return true;
}
public boolean promptPassword(String message) {
Object[] ob = { passwordField };
int result = JOptionPane.showConfirmDialog(null, ob, message,
JOptionPane.OK_CANCEL_OPTION);
if (result == JOptionPane.OK_OPTION) {
passwd = 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
}
}
}
public static void exec_Command(Channel channel, Session session,
String command) throws JSchException, IOException {
((ChannelExec) channel).setCommand(command);
channel.setInputStream(null);
((ChannelExec) channel).setErrStream(System.err);
InputStream in = channel.getInputStream();
channel.connect();
byte[] tmp = new byte[1024];
while (true) {
while (in.available() > 0) {
int i = in.read(tmp, 0, 1024);
if (i < 0)
break;
System.out.print(new String(tmp, 0, i));
}
if (channel.isClosed()) {
System.out.println("exit-status: " + channel.getExitStatus());
break;
}
}
try {
Thread.sleep(1000);
} catch (Exception ee) {
}
}
}
