signature.h

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/*
 * Copyright 2014 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.
 */


#ifndef PAGESPEED_KERNEL_BASE_SIGNATURE_H_
#define PAGESPEED_KERNEL_BASE_SIGNATURE_H_

#include "pagespeed/kernel/base/basictypes.h"
#include "pagespeed/kernel/base/string.h"
#include "pagespeed/kernel/base/string_util.h"


#ifndef ENABLE_URL_SIGNATURES
#define ENABLE_URL_SIGNATURES 1
#endif

namespace net_instaweb {

class Signature {
 public:
  explicit Signature();
  virtual ~Signature();

  GoogleString Sign(StringPiece key, StringPiece data) const;

  virtual int SignatureSizeInChars() const = 0;

 protected:
  virtual GoogleString RawSign(StringPiece key, StringPiece data) const = 0;
  virtual int RawSignatureSizeInBytes() const = 0;

 private:
  
};

} 


#endif