(Android™) DKIM Signature using Windows Current User Certificate Store

This is a Windows-specific example to load a certificate from the Current User (registry-based) certificate store, and then use the certificate's associated private key for a DKIM signature.

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.

    CkCert cert = new CkCert();

    // The LoadByCommonName method searches the Windows Local Machine and Current User 
    // registry-based certificate stores for a certificate having the common name specified. 
    // If found, the certificate is loaded and ready for use.
    boolean success = cert.LoadByCommonName("My Certificate ABC");
    if (success != true) {
        Log.i(TAG, cert.lastErrorText());
        return;
        }

    // The certificate must have an associated private key installed, and it must be a
    // private key that has been marked "exportable" when it was originally installed.
    if (!cert.HasPrivateKey()) {
        Log.i(TAG, "This certificate does not have a private key available.");
        return;
        }

    CkPrivateKey privKey;

    privKey = cert.ExportPrivateKey();
    if (cert.get_LastMethodSuccess() == false) {
        Log.i(TAG, cert.lastErrorText());
        return;
        }

    CkDkim dkim = new CkDkim();

    // Load the private key into the DKIM object:
    success = dkim.LoadDkimPk(privKey.getPkcs8Pem(),"");
    if (success != true) {
        Log.i(TAG, dkim.lastErrorText());
        return;
        }

    // The private key has been loaded into the DKIM object.  See the other DKIM
    // examples for guidance on how to create a DKIM signature...


  }

  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."
  }
}