(Android™) SFTP Authentication using X.509 Certificates

See more SFTP Examples

Demonstrates how to authenticate with an SSH/SFTP server using an certificate's private key.

Note: See X.509v3 Certificates for SSH Authentication for more information.

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.

    CkSFtp sftp = new CkSFtp();

    String hostname = "sftp.example.com";
    int port = 22;
    boolean success = sftp.Connect(hostname,port);
    if (success != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    // Load the cert + private key from a .pfx.
    // Note: Chilkat provides methods for loading certs and private keys from many sources, including smart cards and USB tokens (HSM's)
    CkCert cert = new CkCert();
    success = cert.LoadPfxFile("qa_data/pfx/example.pfx","pfx_password");
    if (success != true) {
        Log.i(TAG, cert.lastErrorText());
        return;
        }

    // Get the cert's private key (as PEM) to be used for SSH authentication.
    // (The public key is installed on the server.)
    String privKeyPem = cert.getPrivateKeyPem();
    if (cert.get_LastMethodSuccess() == false) {
        Log.i(TAG, cert.lastErrorText());
        return;
        }

    CkSshKey key = new CkSshKey();

    // Load a private key from a PEM string:
    success = key.FromOpenSshPrivateKey(privKeyPem);
    if (success != true) {
        Log.i(TAG, key.lastErrorText());
        return;
        }

    // Authenticate with the SSH server.
    success = sftp.AuthenticatePk("myLogin",key);
    if (success != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    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."
  }
}