Open a Forwarded Channel through an SSH Tunnel

See more Socket/SSL/TLS Examples

Demonstrates Socket.SshNewChannel, which opens a port-forwarded channel through an authenticated SSH tunnel to a destination host and port, populating a Socket with the connected channel.

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    boolean success = false;

    CkSocket socket = new CkSocket();

    //  Connect to the SSH server and initialize an SSH tunneling session.  Port 22 is conventional but
    //  not required.
    success = socket.SshOpenTunnel("ssh.example.com",22);
    if (success == false) {
        Log.i(TAG, socket.lastErrorText());
        return;
        }

    //  Authenticate the SSH session before opening forwarded channels.
    //  The SSH password should come from a secure source rather than being hard-coded.
    String sshPassword = "mySshPassword";
    success = socket.SshAuthenticatePw("sshUser",sshPassword);
    if (success == false) {
        Log.i(TAG, socket.lastErrorText());
        return;
        }

    //  Open a port-forwarded channel through the authenticated SSH tunnel to the destination host and
    //  port, populating a Socket with the connected channel.  Set the 3rd argument to true to establish
    //  TLS to the destination inside the tunnel.
    boolean bTls = false;
    int maxWaitMs = 20000;
    CkSocket channel = new CkSocket();
    success = socket.SshNewChannel("db.internal",5432,bTls,maxWaitMs,channel);
    if (success == false) {
        Log.i(TAG, socket.lastErrorText());
        return;
        }

    //  Use the channel socket to send and receive with the destination through the tunnel.
    Log.i(TAG, "Forwarded channel opened to the destination.");

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}