Export a Private Key as DER into a BinData

See more Private Key Examples

Demonstrates the Chilkat PrivateKey.GetPkcsBd method, which exports the key as DER into a BinData. The first argument selects PKCS #1 (true) versus PKCS #8 (false), the second is the password (empty for unencrypted), and the third is the BinData that receives the bytes.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

// 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;

    //  Load a private key to export.
    CkPrivateKey privKey = new CkPrivateKey();
    success = privKey.LoadPemFile("qa_data/private.pem");
    if (success == false) {
        Log.i(TAG, privKey.lastErrorText());
        return;
        }

    //  The key password is not hard-coded in a real application; obtain it from an interactive
    //  prompt, environment variable, or a secrets vault.
    String password = "myKeyPassword";

    //  Export the key as DER into a BinData.  The 1st argument selects PKCS #1 (true) versus PKCS #8
    //  (false); the 2nd is the password (empty string for an unencrypted export); the 3rd is the
    //  BinData that receives the DER bytes.
    boolean usePkcs1 = false;
    CkBinData bd = new CkBinData();
    success = privKey.GetPkcsBd(usePkcs1,password,bd);
    if (success == false) {
        Log.i(TAG, privKey.lastErrorText());
        return;
        }

    Log.i(TAG, "Exported " + String.valueOf(bd.get_NumBytes()) + " DER bytes.");

  }

  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."
  }
}