File: SERNonceHelper.hxx

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#if !defined(RESIP_BASICNONCEHELPER_HXX)
#define RESIP_BASICNONCEHELPER_HXX

#include "resip/stack/NonceHelper.hxx"
#include "resip/stack/SipMessage.hxx"
#include "rutil/Data.hxx"

/**
 * SERNonceHelper implements the makeNonce function in the same way
 * as SIP Express Router (SER) - http://www.iptel.org/ser
 *
 * To operate a farm/cluster of UASs/proxies, you must:
 * a) make sure the clocks are sychronized (using ntpd for instance)
 * b) use the same privateKey value on every instance of the application
 * c) call Helper::setNonceHelper(mySERNonceHelper) to over-ride
 *    the default implementation of NonceHelper in the reSIProcate stack
 *
 */

namespace resip
{

class SERNonceHelper : public NonceHelper {

   private:
      Data privateKey; 
      // SER puts the expiry time in the nonce, while the reSIProcate stack
      // expects to work with the creation time of the nonce.  Therefore,
      // serOffset should be initialised to the duration for which a SER
      // generated nonce is valid, in seconds.
      int serOffset;

   public:
      SERNonceHelper(int serOffset);
      virtual ~SERNonceHelper();
      void setPrivateKey(const Data& privateKey);
      Data makeNonce(const SipMessage& request, const Data& timestamp);  
      Nonce parseNonce(const Data& nonce);

};

}

#endif


/* ====================================================================
 * The Vovida Software License, Version 1.0
 *
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 *
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 * This software consists of voluntary contributions made by Vovida
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