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<?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.
 */
 
 require_once "Google_P12Signer.php";
 
 /**
 * Signs data.
 *
 * @author Brian Eaton <[email protected]>
 */
 abstract class Google_Signer {
 /**
 * Signs data, returns the signature as binary data.
 */
 abstract public function sign($data);
 }
 
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