(Android™) Blowfish Encryption to Match PHP's Mcrypt Extension

Demonstrates how to match Blowfish encryption results with PHP's mcrypt extension.

Please refer to this PHP (non-Chilkat) example for PHP Blowfish Encryption. The code here matches the PHP mcrypt results on that web page.

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.

    CkCrypt2 crypt = new CkCrypt2();

    // Use "blowfish2" to get proper results:
    crypt.put_CryptAlgorithm("blowfish2");

    // CipherMode may be "ecb" or "cbc"
    crypt.put_CipherMode("cbc");

    // KeyLength (in bits) may be a number between 32 and 448.
    // 128-bits is usually sufficient.  The KeyLength must be a 
    // multiple of 8.
    crypt.put_KeyLength(256);

    // Pad with NULL bytes (PHP pads with NULL bytes)
    crypt.put_PaddingScheme(3);

    // EncodingMode specifies the encoding of the output for
    // encryption, and the input for decryption.
    // It may be "hex", "url", "base64", or "quoted-printable".
    crypt.put_EncodingMode("hex");

    // The blowfish algorithm uses a 64-bit block size, 
    // therefore the IV must be 8 bytes:
    String ivAscii = "12345678";
    crypt.SetEncodedIV(ivAscii,"ascii");

    // For 256-bit encryption, the key is 32 bytes:
    String keyAscii = "1234567890123456ABCDEFGHIJKLMNOP";
    crypt.SetEncodedKey(keyAscii,"ascii");

    String plainText;
    plainText = "The quick brown fox jumped over the lazy dog";

    String cipherText = crypt.encryptStringENC(plainText);
    Log.i(TAG, cipherText);
    // Output should be (case insensitive):
    // 276855ca6c0d60f7d9708210440c1072e05d078e733b34b4198d609dc2fcc2f0c30926cdef3b6d52baf6e345aa03f83e

    // Do 128-bit Blowfish encryption:
    crypt.put_KeyLength(128);
    keyAscii = "1234567890123456";
    crypt.SetEncodedKey(keyAscii,"ascii");

    cipherText = crypt.encryptStringENC(plainText);
    Log.i(TAG, cipherText);
    // Output should be (case insensitive):
    // d2b5abb73208aea3790621d028afcc74d8dd65fb9ea8e666444a72523f5ecca60df79a424e2c714fa6efbafcc40bdca

  }

  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."
  }
}