| // |
| // ======================================================================== |
| // Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.websocket.common.io.payload; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.eclipse.jetty.websocket.api.extensions.Frame; |
| |
| public class DeMaskProcessor implements PayloadProcessor |
| { |
| private byte[] maskBytes; |
| private int maskInt; |
| private int maskOffset; |
| |
| @Override |
| public void process(ByteBuffer payload) |
| { |
| if (maskBytes == null) |
| { |
| return; |
| } |
| |
| int maskInt = this.maskInt; |
| int start = payload.position(); |
| int end = payload.limit(); |
| int offset = this.maskOffset; |
| int remaining; |
| while ((remaining = end - start) > 0) |
| { |
| if (remaining >= 4 && (offset & 3) == 0) |
| { |
| payload.putInt(start,payload.getInt(start) ^ maskInt); |
| start += 4; |
| offset += 4; |
| } |
| else |
| { |
| payload.put(start,(byte)(payload.get(start) ^ maskBytes[offset & 3])); |
| ++start; |
| ++offset; |
| } |
| } |
| maskOffset = offset; |
| } |
| |
| public void reset(byte[] mask) |
| { |
| this.maskBytes = mask; |
| int maskInt = 0; |
| if (mask != null) |
| { |
| for (byte maskByte : mask) |
| maskInt = (maskInt << 8) + (maskByte & 0xFF); |
| } |
| this.maskInt = maskInt; |
| this.maskOffset = 0; |
| } |
| |
| @Override |
| public void reset(Frame frame) |
| { |
| reset(frame.getMask()); |
| } |
| } |