(Android™) Generate RSA Key and Export to Encrypted PEM

Android™ sample showing how to generate an RSA key and export to encrypted PEM.

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.

    CkRsa rsa = new CkRsa();

    // Generate a 1024-bit key.  Chilkat RSA supports
    // key sizes ranging from 512 bits to 4096 bits.
    boolean success = rsa.GenerateKey(1024);
    if (success != true) {
        Log.i(TAG, rsa.lastErrorText());
        return;
        }

    // Get the private key as unencrypted XML:
    String keyXml = rsa.exportPrivateKey();
    Log.i(TAG, keyXml);

    // To encrypt the key -- meaning to get the key in
    // an encrypted PEM format -- load it into a PrivateKey object,
    // and then export to encrypted PEM:
    CkPrivateKey privKey = new CkPrivateKey();

    success = privKey.LoadXml(keyXml);
    if (success != true) {
        Log.i(TAG, privKey.lastErrorText());
        return;
        }

    String strEncPem;

    strEncPem = privKey.getPkcs8EncryptedPem("myPassword");

    // You now have the private key in an encrypted format,
    // which may be (for example) saved to a database

  }

  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."
  }
}