Android™

Get the Certificate with Private Key from a Java KeyStore

See more Java KeyStore (JKS) Examples

Load a Chilkat certificate object from a Java KeyStore. Android™

// 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;

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

    // Most of the time a .jks contains one certificate with it's associated private key.
    // (Similar to how a .pfx/.p12 usually contains a particular certificate with private key.)
    // This example demonstrates how to get the certificate with private key such that it can be used
    // by other Chilkat classes wherever a cert w/ private key is needed.
    CkJavaKeyStore jks = new CkJavaKeyStore();
    String password = "secret";
    success = jks.LoadFile(password,"qa_data/jks/test_secret.jks");
    if (success == false) {
        Log.i(TAG, jks.lastErrorText());
        return;
        }

    // Make sure we have a private key.
    if (jks.get_NumPrivateKeys() < 1) {
        Log.i(TAG, "No private key available.");
        return;
        }

    // -------------------------------------------------------------------------
    // Get the certificate chain associated with the 1st (and probably only) private key in the JKS.

    CkCertChain chain = new CkCertChain();
    success = jks.CertChainAt(0,chain);
    if (success == false) {
        Log.i(TAG, jks.lastErrorText());
        return;
        }

    CkCert cert = new CkCert();
    success = chain.CertAt(0,cert);
    if (success == false) {
        Log.i(TAG, chain.lastErrorText());
        return;
        }

    // Verify again that this cert has a private key.
    if (cert.HasPrivateKey() != true) {
        Log.i(TAG, "Certificate has no associated private key.");
        return;
        }

    // We now have the cert object with it's associated private key, and it can be used in other Chilkat classes where needed.
    // For example..

    CkCrypt2 crypt = new CkCrypt2();
    success = crypt.SetSigningCert(cert);
    if (success == false) {
        Log.i(TAG, crypt.lastErrorText());
        return;
        }

    // ...
    // ...

  }

  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."
  }
}