#if !defined(RESIP_NONCEHELPER_HXX)

#define RESIP_NONCEHELPER_HXX

#include "resip/stack/SipMessage.hxx"

#include "rutil/Data.hxx"

namespace resip

{

class NonceHelper 

{

   public:

      class Nonce 

      {

         private:

            uint64_t creationTime;

         public:

            Nonce(uint64_t creationTime);

            virtual ~Nonce();

            uint64_t getCreationTime() { return creationTime; };

      };

      virtual ~NonceHelper()=0;

      // Generate a nonce string

      virtual Data makeNonce(const SipMessage& request, const Data& timestamp) = 0;

      // Read a nonce string into a Nonce instance, so that we can inspect

      // the un-encrypted time stamp

      virtual NonceHelper::Nonce parseNonce(const Data& nonce) = 0;

};

}

#endif

/* ====================================================================

 *

 * Copyright 2012 Daniel Pocock.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 *

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in

 *    the documentation and/or other materials provided with the

 *    distribution.

 *

 * 3. Neither the name of the author(s) nor the names of any contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTORS "AS IS" AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 * ====================================================================

 *

 *

 */