(Android™) SFTP Authentication using an SSH Certificate

See more SFTP Examples

Note: This example requires Chilkat v11.0.0 or greater.

For more information, see https://www.chilkatsoft.com/understanding_ssh_certificates.asp

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.

    CkStringBuilder sbSshCert = new CkStringBuilder();
    boolean success = sbSshCert.LoadFile("qa_data/sshCert/user_ecdsa_key-cert.pub","utf-8");
    if (success == false) {
        Log.i(TAG, "Failed to load user_ecdsa_key-cert.pub");
        return;
        }

    CkStringBuilder sbPrivKey = new CkStringBuilder();
    success = sbPrivKey.LoadFile("qa_data/sshKeys/user_ecdsa_key","utf-8");
    if (success == false) {
        Log.i(TAG, "Failed to load user_ecdsa_key");
        return;
        }

    CkSshKey key = new CkSshKey();
    // Provide the password if the user_ecdsa_key is stored in an encrypted format.
    key.put_Password("secret");
    success = key.FromOpenSshPrivateKey(sbPrivKey.getAsString());
    if (success == false) {
        Log.i(TAG, key.lastErrorText());
        return;
        }

    // Indicate that the SSH certificate is to be used for authentication.
    // The UseSshCertificate method was added in Chilkat v11.0.0
    key.UseSshCertificate(sbSshCert.getAsString());

    CkSFtp sftp = new CkSFtp();

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

    success = sftp.AuthenticatePk("myLogin",key);
    if (success != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    Log.i(TAG, "Public-Key Authentication using an SSH Certificate was 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."
  }
}