Android™

Workaround for the deprecated EncryptString and DecryptString methods

Shows how to replace the deprecated EncryptString and DecryptString methods. (Chilkat is moving away from the use of CkByteData.) 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();

    crypt.put_CryptAlgorithm("aes");
    crypt.put_CipherMode("cbc");
    crypt.put_KeyLength(128);
    crypt.put_PaddingScheme(0);
    crypt.SetEncodedKey("000102030405060708090A0B0C0D0E0F","hex");
    crypt.SetEncodedIV("000102030405060708090A0B0C0D0E0F","hex");

    success = false;

    crypt.put_Charset("utf-8");
    String plainText = "text to be encrypted";

    //  ------------------------------------------------------------------------
    //  The EncryptString and DecryptString methods are deprecated:

    CkByteData encryptedBytes = new CkByteData();
    success = crypt.EncryptString(plainText,encryptedBytes);

    String decryptedStr = crypt.decryptString(encryptedBytes);
    Log.i(TAG, "Decrypted: " + decryptedStr);

    //  ------------------------------------------------------------------------
    //  Replace the above CkByteData usage with the following code:
    //  (Chilkat is moving away from using CkByteData)

    CkBinData bd = new CkBinData();
    bd.AppendString(plainText,"utf-8");

    //  in-place encrypt
    crypt.EncryptBd(bd);

    //  in-place decrypt
    crypt.DecryptBd(bd);
    decryptedStr = bd.getString("utf-8");
    Log.i(TAG, "Decrypted: " + decryptedStr);

  }

  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."
  }
}