/*
* Funambol is a mobile platform developed by Funambol, Inc.
* Copyright (C) 2003 - 2007 Funambol, Inc.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU Affero General Public License version 3 as published by
* the Free Software Foundation with the addition of the following permission
* added to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED
* WORK IN WHICH THE COPYRIGHT IS OWNED BY FUNAMBOL, FUNAMBOL DISCLAIMS THE
* WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA.
*
* You can contact Funambol, Inc. headquarters at 643 Bair Island Road, Suite
* 305, Redwood City, CA 94063, USA, or at email address info@funambol.com.
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License version 3.
*
* In accordance with Section 7(b) of the GNU Affero General Public License
* version 3, these Appropriate Legal Notices must retain the display of the
* "Powered by Funambol" logo. If the display of the logo is not reasonably
* feasible for technical reasons, the Appropriate Legal Notices must display
* the words "Powered by Funambol".
*/
package com.funambol.syncclient.blackberry.email.impl;
import java.io.*;
import net.rim.device.api.crypto.*;
import net.rim.device.api.util.DataBuffer;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import com.funambol.syncclient.util.StaticDataHelper;
import net.rim.device.api.crypto.MD5Digest;
/**
* <code>Sync4jCrypto</code> Uses TripleDES Encryption & Decryption to encrypt & decrypt the data
*
*/
public class Sync4jCrypto {
TripleDESKey key;
private byte [] cred;
public Sync4jCrypto(byte [] cred ) {
this.cred = cred;
MD5Digest md = new MD5Digest();
md.update(cred);
byte[] keyBytes = md.getDigest(true);
key = new TripleDESKey(keyBytes);
}
/**
*@param String: data
*encrypts the data
*
**/
public byte[] encryptData(String data){
try{
TripleDESEncryptorEngine encryptionEngine = new TripleDESEncryptorEngine( key );
PKCS5FormatterEngine formatterEngine = new PKCS5FormatterEngine( encryptionEngine );
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
BlockEncryptor encryptor = new BlockEncryptor( formatterEngine, outputStream );
// Encrypt the actual data.
encryptor.write( data.getBytes() );
encryptor.close();
return outputStream.toByteArray();
}catch( CryptoTokenException e ) {
StaticDataHelper.log(e.toString());
} catch (CryptoUnsupportedOperationException e) {
StaticDataHelper.log(e.toString());
} catch( IOException e ) {
StaticDataHelper.log(e.toString());
}
return null;
}
/**
*@param byte [] : data
*@return String : data
*decrypts the data
*
**/
public String decryptData(byte[] data){
try{
TripleDESDecryptorEngine decryptorEngine = new TripleDESDecryptorEngine( key );
PKCS5UnformatterEngine unformatterEngine = new PKCS5UnformatterEngine( decryptorEngine );
ByteArrayInputStream inputStream = new ByteArrayInputStream(data);
BlockDecryptor decryptor = new BlockDecryptor( unformatterEngine, inputStream );
byte[] read = new byte[data.length];
DataBuffer databuffer = new DataBuffer();
int bytesRead = decryptor.read( read );
if( bytesRead > 0 ) {
databuffer.write(read, 0, bytesRead);
}
byte[] decryptedData = databuffer.toArray();
return decryptedData.toString();
}catch( CryptoTokenException e ) {
StaticDataHelper.log(e.toString());
} catch (CryptoUnsupportedOperationException e) {
StaticDataHelper.log(e.toString());
} catch( IOException e ) {
StaticDataHelper.log(e.toString());
}
return null;
}
}