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1   /*
2    * Copyright 2007-2008 Volker Fritzsch
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License. 
15   */
16  package motej;
17  
18  /**
19   * 
20   * <p>
21   * @author <a href="mailto:vfritzsch@users.sourceforge.net">Volker Fritzsch</a>
22   */
23  public abstract class AbstractExtension implements Extension {
24  
25  	protected void decrypt(byte[] data) {
26  		for (int i = 0; i < data.length; i++) {
27  			data[i] = (byte) (((byte) data[i] ^ (byte) 0x17) + (byte) 0x17);
28  		}
29  	}
30  
31  }