Android™

Example: Crypt2.ClearEncryptCerts method

Demonstrates how to call the ClearEncryptCerts method. Android™

// 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;

    CkCrypt2 crypt = new CkCrypt2();

    //  Tell the crypt object to use 3 certificates.
    //  Do this by calling AddEncryptCert for each certificate.

    CkCert cert1 = new CkCert();
    //  ...
    //  Load the cert from a source such as a .pfx/.p12 file, smart card, USB token, Apple keychain, Windows certificate store, etc.
    //  ...
    crypt.AddEncryptCert(cert1);

    CkCert cert2 = new CkCert();
    //  ...
    crypt.AddEncryptCert(cert2);

    CkCert cert3 = new CkCert();
    //  ...
    crypt.AddEncryptCert(cert3);

    //  Params for public-key encryption to create PKCS7 enveloped-data
    crypt.put_CryptAlgorithm("pki");
    crypt.put_Pkcs7CryptAlg("aes");
    crypt.put_KeyLength(256);
    crypt.put_OaepHash("sha256");
    crypt.put_OaepPadding(true);

    CkBinData bd = new CkBinData();
    //  ...
    success = crypt.EncryptBd(bd);

    //  Let's say we now want to encrypt something else with different certs..
    //  First clear the encryption certs.
    crypt.ClearEncryptCerts();

    CkCert cert4 = new CkCert();
    //  ...
    crypt.AddEncryptCert(cert4);

    CkCert cert5 = new CkCert();
    //  ...
    crypt.AddEncryptCert(cert5);

    //  ...
    //  ...

    //  Encrypt using cert4 and cert5.
    success = crypt.EncryptBd(bd);

  }

  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."
  }
}