(Android™) Write PKCS1 or PKCS8 Public Key PEM

Demonstrates how to write either PKCS1 or PKCS8 format PEM files. PKCS1 public keys have this PEM format:

-----BEGIN RSA PUBLIC KEY-----
BASE64 ENCODED DATA
-----END RSA PUBLIC KEY-----

-----BEGIN PUBLIC KEY-----
BASE64 ENCODED DATA
-----END PUBLIC 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);

    // Unlock the Chilkat API.
    // Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
    // by calling UnlockBundle.  It requires a Bundle unlock code.
    CkGlobal chilkatGlob = new CkGlobal();
    boolean success = chilkatGlob.UnlockBundle("Anything for 30-day trial.");
    if (success != true) {
        Log.i(TAG, chilkatGlob.lastErrorText());
        return;
        }

    CkPem pem = new CkPem();

    // Load a public key from a PEM file.
    // (Assume the PEM contains at least one public key..)
    success = pem.LoadPemFile("/Users/chilkat/testData/pem/myPublicKey.pem");
    if (success != true) {
        Log.i(TAG, pem.lastErrorText());
        return;
        }

    int i;
    int numPublicKeys = pem.get_NumPublicKeys();
    if (numPublicKeys == 0) {
        Log.i(TAG, ("Error: Expected the PEM to contain public keys."));
        return;
        }

    // Get each public key as PEM, first in PKCS1 format, then in PKCS8.
    for (i = 1; i <= numPublicKeys; i++) {

        // First output to PKCS1 PEM format:
        Log.i(TAG, "This is PKCS1 format:");
        pem.put_PublicKeyFormat("pkcs1");
        Log.i(TAG, pem.toPem());

        // Now PKCS8 PEM format:
        Log.i(TAG, "This is PKCS8 format:");
        pem.put_PublicKeyFormat("pkcs8");
        Log.i(TAG, pem.toPem());

        }


  }

  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."
  }
}