SERNonceHelper.cxx

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#include "resip/stack/SERNonceHelper.hxx"
#include "rutil/Random.hxx"
#include "resip/stack/Helper.hxx"

using namespace resip;

#define RESIPROCATE_SUBSYSTEM Subsystem::SIP


SERNonceHelper::SERNonceHelper(int serOffset) : serOffset(serOffset)
{
   //privateKey = Data("asdfklsadflkj");
   privateKey = Random::getRandomHex(24);
}

SERNonceHelper::~SERNonceHelper() 
{
}

void
SERNonceHelper::setPrivateKey(const Data& pprivateKey)
{
   this->privateKey = pprivateKey;
}

Data 
SERNonceHelper::makeNonce(const SipMessage& request, const Data& timestamp) 
{
   char buf[8];
   Data md5buf(8, Data::Preallocate);
   Data nonce(40, Data::Preallocate);
   int ts = timestamp.convertInt() + serOffset;
   Helper::integer2hex(buf, ts);
   md5buf.append(buf, 8);
   nonce.append(buf, 8);
   md5buf += privateKey;
   nonce += md5buf.md5(); 
   return nonce;
}

NonceHelper::Nonce
SERNonceHelper::parseNonce(const Data& nonce) 
{
   if(nonce.size() != 40)
   {
      return SERNonceHelper::Nonce(0);
   }
   const char *s = nonce.data();
   unsigned int ts = Helper::hex2integer(s) - serOffset;
   return SERNonceHelper::Nonce(ts); 
}


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