(Android™) Use HTTPS Client Certificate from .cer and .key Files

Demonstrates how to load a cert + private key from .cer and .key (base64) files and use it for mutual TLS authentication (client-side certificate).

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

    CkHttp http = new CkHttp();

    CkCert cert = new CkCert();
    CkPrivateKey privKey = new CkPrivateKey();

    // Load any type of certificate (.cer, .p7b, .pem, etc.) by calling LoadFromFile.
    boolean success = cert.LoadFromFile("qa_data/certs/sample_cert_a.cer");
    if (success != true) {
        Log.i(TAG, cert.lastErrorText());
        return;
        }

    // Load the private key.
    CkBinData bd = new CkBinData();
    success = bd.LoadFile("qa_data/certs/sample_key_a.key");
    success = privKey.LoadAnyFormat(bd,"privateKeyPasswordIfNecessary");
    if (success != true) {
        Log.i(TAG, privKey.lastErrorText());
        return;
        }

    // Associate the private key with the cert.
    success = cert.SetPrivateKey(privKey);
    if (success != true) {
        Log.i(TAG, cert.lastErrorText());
        return;
        }

    // Set the certificate to be used for mutual TLS authentication
    // (i.e. sets the client-side certificate for two-way TLS authentication)
    success = http.SetSslClientCert(cert);
    if (success != true) {
        Log.i(TAG, http.lastErrorText());
        return;
        }

    // At this point, the HTTP object instance is setup with the client-side cert, and any SSL/TLS
    // connection will automatically use it if the server demands a client-side cert.

  }

  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."
  }
}