(Android™) Generate RSA Public/Private Key

Android™ example code showing how to generate an RSA public/private key.

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.
    // Note: Starting in Chilkat v9.5.0.49, RSA key sizes can be up to 8192 bits.
    // It takes a considerable amount of time and processing power to generate
    // an 8192-bit key.
    boolean success = rsa.GenerateKey(1024);
    if (success != true) {
        Log.i(TAG, rsa.lastErrorText());
        return;
        }

    // Keys are exported in XML format:
    String publicKey = rsa.exportPublicKey();
    Log.i(TAG, publicKey);

    String privateKey = rsa.exportPrivateKey();
    Log.i(TAG, privateKey);

  }

  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."
  }
}