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(Android™) Generate an RSA Key and Get as Base64 DERDemonstrates how to generate a 2048-bit RSA key and return the public and private parts as unencrypted Base64 encoded DER. Note: This example requires Chilkat v11.0.0 or greater.
// 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 assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. CkRsa rsa = new CkRsa(); // Generate a 2048-bit key. CkPrivateKey privKey = new CkPrivateKey(); success = rsa.GenKey(2048,privKey); if (success == false) { Log.i(TAG, rsa.lastErrorText()); return; } // Get the public part of the key. CkPublicKey pubKey = new CkPublicKey(); privKey.ToPublicKey(pubKey); // There are two possible formats for representing the RSA public key // in ASN.1 (DER). The possible formats are PKCS1 and PKCS8. // We can get either by setting bChoosePkcs1 to true or false. boolean bChoosePkcs1 = true; String pubKeyBase64Der = pubKey.getEncoded(bChoosePkcs1,"base64"); Log.i(TAG, "Public Key Base64 DER:"); Log.i(TAG, pubKeyBase64Der); // Get the private key as Base64 DER: // We can get PKCS1 or PKCS8, but with different methods: String privKeyPkcs1 = privKey.getPkcs1ENC("base64"); Log.i(TAG, "Private Key PKCS1 Base64 DER:"); Log.i(TAG, privKeyPkcs1); String privKeyPkcs8 = privKey.getPkcs8ENC("base64"); Log.i(TAG, "Private Key PKCS8 Base64 DER:"); Log.i(TAG, privKeyPkcs8); } 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." } } |
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