(Android™) SSH Public Key Authentication

Demonstrates how to authenticate with an SSH server using public key authentication.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// 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);

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSsh ssh = new CkSsh();

    // Set some timeouts, in milliseconds:
    ssh.put_ConnectTimeoutMs(5000);
    ssh.put_IdleTimeoutMs(15000);

    // Connect to the SSH server.  
    // The standard SSH port = 22
    // The hostname may be a hostname or IP address.
    String hostname = "sftp.example.com";
    int port = 22;
    boolean success = ssh.Connect(hostname,port);
    if (success != true) {
        Log.i(TAG, ssh.lastErrorText());
        return;
        }

    CkSshKey key = new CkSshKey();

    // Read the PEM file into a string variable:
    // (This does not load the PEM file into the key.  The LoadText
    // method is a convenience method for loading the full contents of ANY text
    // file into a string variable.)
    String privKey = key.loadText("myPrivateKey.pem");
    if (key.get_LastMethodSuccess() != true) {
        Log.i(TAG, key.lastErrorText());
        return;
        }

    // Load a private key from a PEM string:
    // (Private keys may be loaded from OpenSSH and Putty formats.
    // Both encrypted and unencrypted private key file formats
    // are supported.  This example loads an unencrypted private
    // key in OpenSSH format.  PuTTY keys typically use the .ppk
    // file extension, while OpenSSH keys use the PEM format.
    // (For PuTTY keys, call FromPuttyPrivateKey instead.)
    success = key.FromOpenSshPrivateKey(privKey);
    if (success != true) {
        Log.i(TAG, key.lastErrorText());
        return;
        }

    // Authenticate with the SSH server using the login and
    // private key.  (The corresponding public key should've 
    // been installed on the SSH server beforehand.)
    success = ssh.AuthenticatePk("myLogin",key);
    if (success != true) {
        Log.i(TAG, ssh.lastErrorText());
        return;
        }

    Log.i(TAG, ssh.lastErrorText());
    Log.i(TAG, "Public-Key Authentication Successful!");

  }

  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."
  }
}