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/**
* This program enables you to connect to sshd server and get the shell prompt. You will be asked
* username, hostname and passwd. If everything works fine, you will get the shell prompt. Output
* may be ugly because of lacks of terminal-emulation, but you can issue commands.
*/
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.UIKeyboardInteractive;
import com.jcraft.jsch.UserInfo;
import javax.swing.JOptionPane;
public class Shell {
public static void main(String[] arg) {
try {
JSch jsch = new JSch();
// jsch.setKnownHosts("/home/foo/.ssh/known_hosts");
String host = null;
if (arg.length > 0) {
host = arg[0];
} else {
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);
String passwd = JOptionPane.showInputDialog("Enter password");
session.setPassword(passwd);
UserInfo ui = new MyUserInfo() {
@Override
public void showMessage(String message) {
JOptionPane.showMessageDialog(null, message);
}
@Override
public boolean promptYesNo(String message) {
Object[] options = {"yes", "no"};
int foo = JOptionPane.showOptionDialog(null, message, "Warning",
JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE, null, options, options[0]);
return foo == 0;
}
// If password is not given before the invocation of Session#connect(),
// implement also following methods,
// * UserInfo#getPassword(),
// * UserInfo#promptPassword(String message) and
// * UIKeyboardInteractive#promptKeyboardInteractive()
};
session.setUserInfo(ui);
// It must not be recommended, but if you want to skip host-key check,
// invoke following,
// session.setConfig("StrictHostKeyChecking", "no");
// session.connect();
session.connect(30000); // making a connection with timeout.
Channel channel = session.openChannel("shell");
// Enable agent-forwarding.
// ((ChannelShell) channel).setAgentForwarding(true);
channel.setInputStream(System.in);
// a hack for MS-DOS prompt on Windows.
// channel.setInputStream(new FilterInputStream(System.in) {
// @Override
// public int read(byte[] b, int off, int len) throws IOException {
// return in.read(b, off, len > 1024 ? 1024 : len);
// }
// });
channel.setOutputStream(System.out);
// Choose the pty-type "vt102".
// ((ChannelShell) channel).setPtyType("vt102");
// Set environment variable "LANG" as "ja_JP.eucJP".
// ((ChannelShell) channel).setEnv("LANG", "ja_JP.eucJP");
// channel.connect();
channel.connect(3 * 1000);
} catch (Exception e) {
System.out.println(e);
}
}
public abstract static class MyUserInfo implements UserInfo, UIKeyboardInteractive {
@Override
public String getPassword() {
return null;
}
@Override
public String getPassphrase() {
return null;
}
@Override
public boolean promptPassphrase(String message) {
return false;
}
@Override
public boolean promptPassword(String message) {
return false;
}
@Override
public String[] promptKeyboardInteractive(String destination, String name, String instruction,
String[] prompt, boolean[] echo) {
return null;
}
}
}
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