MaskingHelper.java

/*
 * Copyright (c) 2014-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

package com.facebook.stetho.websocket;

class MaskingHelper {
  public static void unmask(byte[] key, byte[] data, int offset, int count) {
    int index = 0;
    while (count-- > 0) {
      data[offset++] ^= key[index++ % key.length];
    }
  }
}