#include <ctype.h>

#include "resip/stack/BasicNonceHelper.hxx"

#include "rutil/Logger.hxx"

#include "rutil/ParseBuffer.hxx"

#include "rutil/Random.hxx"

using namespace resip;

#define RESIPROCATE_SUBSYSTEM Subsystem::SIP

/**

 * BasicNonceHelper implements the makeNonce function in the same way

 * as the original implementation of makeNonce within Helper.cxx

 *

 * 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

 *

 * To operate with SER, use the SERNonceHelper instead, as that generates

 * the nonce string the same way as SER.  You must also observe the same

 * conditions above regarding clock and key synchronization.

 */

BasicNonceHelper::BasicNonceHelper() 

{

  //privateKey = Data("asdfklsadflkj");

  privateKey = Random::getCryptoRandomHex(24);

}

BasicNonceHelper::~BasicNonceHelper() 

{

}

void

BasicNonceHelper::setPrivateKey(const Data& pprivateKey)

{

  this->privateKey = pprivateKey;

}

Data 

BasicNonceHelper::makeNonce(const SipMessage& request, const Data& timestamp) 

{

   Data nonce(100, Data::Preallocate);

   nonce += timestamp;

   nonce += Symbols::COLON;

   Data noncePrivate(100, Data::Preallocate);

   noncePrivate += timestamp;

   noncePrivate += Symbols::COLON;

   // !jf! don't include the Call-Id since it might not be the same.

   // noncePrivate += request.header(h_CallId).value();

   noncePrivate += request.header(h_From).uri().user();

   noncePrivate += privateKey;

   nonce += noncePrivate.md5();

   return nonce;

}

NonceHelper::Nonce

BasicNonceHelper::parseNonce(const Data& nonce) 

{

   ParseBuffer pb(nonce.data(), nonce.size());

   if (!pb.eof() && !isdigit(static_cast< unsigned char >(*pb.position())))

   {

      DebugLog(<< "Invalid nonce; expected timestamp.");

      return BasicNonceHelper::Nonce(0);

   }

   const char* anchor = pb.position();

   pb.skipToChar(Symbols::COLON[0]);

   if (pb.eof())

   {

      DebugLog(<< "Invalid nonce; expected timestamp terminator.");

      return BasicNonceHelper::Nonce(0);

   }

   Data creationTime;

   pb.data(creationTime, anchor);

   return BasicNonceHelper::Nonce(creationTime.convertUInt64());

}

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

 * The Vovida Software License, Version 1.0

 *

 * Copyright (c) 2000 Vovida Networks, Inc.  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. The names "VOCAL", "Vovida Open Communication Application Library",

 *    and "Vovida Open Communication Application Library (VOCAL)" must

 *    not be used to endorse or promote products derived from this

 *    software without prior written permission. For written

 *    permission, please contact vocal@vovida.org.

 *

 * 4. Products derived from this software may not be called "VOCAL", nor

 *    may "VOCAL" appear in their name, without prior written

 *    permission of Vovida Networks, Inc.

 *

 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED

 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND

 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL VOVIDA

 * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES

 * IN EXCESS OF $1,000, NOR FOR ANY 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.

 *

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

 *

 * This software consists of voluntary contributions made by Vovida

 * Networks, Inc. and many individuals on behalf of Vovida Networks,

 * Inc.  For more information on Vovida Networks, Inc., please see

 * <http://www.vovida.org/>.

 *

 */