installed plugin W3 Total Cache version 2.3.2

wp-content/plugins/w3-total-cache/lib/Google/Signer/Abstract.php

@@ -0,0 +1,29 @@
+<?php
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Signs data.
+ *
+ * @author Brian Eaton <beaton@google.com>
+ */
+abstract class W3TCG_Google_Signer_Abstract
+{
+  /**
+   * Signs data, returns the signature as binary data.
+   */
+  abstract public function sign($data);
+}