SHA1Stream.cxx

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#include <assert.h>

#if defined(HAVE_CONFIG_H)
  #include "config.h"
#endif

#include "rutil/Socket.hxx"  // for ntohl under windows
#include "rutil/WinLeakCheck.hxx"

#if defined(USE_SSL)
#include "rutil/ssl/SHA1Stream.hxx"

// Remove warning about 'this' use in initiator list - pointer is only stored
# if defined(WIN32) && !defined(__GNUC__)
#   pragma warning( disable : 4355 ) // using this in base member initializer list 
# endif // WIN32

using namespace resip;

SHA1Buffer::SHA1Buffer()
        : mContext(new SHA_CTX()),
          mBuf(SHA_DIGEST_LENGTH),
          mBlown(false)
{
   SHA1_Init(mContext.get());
   setp(&mBuf[0], (&mBuf[mBuf.size()-1])+1);
}

SHA1Buffer::~SHA1Buffer()
{
}

int
SHA1Buffer::sync()
{
   size_t len = pptr() - pbase();
   if (len > 0) 
   {
      SHA1_Update(mContext.get(), reinterpret_cast <unsigned const char*>(pbase()), len);
      // reset the put buffer
      setp(&mBuf[0], (&mBuf[mBuf.size()-1])+1);
   }
   return 0;
}

int
SHA1Buffer::overflow(int c)
{
   sync();
   if (c != -1) 
   {
      mBuf[0] = c;
      pbump(1);
      return c;
   }
   return 0;
}

Data 
SHA1Buffer::getHex()
{
   assert(mBlown == false);
   SHA1_Final((unsigned char*)&mBuf[0], mContext.get());
   mBlown = true;
   Data digest(Data::Share, (const char*)&mBuf[0], mBuf.size());
   return digest.hex();   
}

Data
SHA1Buffer::getBin(unsigned int bits)
{
   assert(mBlown == false);
   assert (bits % 8 == 0);
   assert (bits / 8 <= mBuf.size());
   SHA1_Final((unsigned char*)&mBuf[0], mContext.get());
   mBlown = true;
   return Data(&mBuf[20-bits/8], bits / 8);
}

SHA1Stream::SHA1Stream()
   : std::ostream(this)
{
}

SHA1Stream::~SHA1Stream()
{}

Data 
SHA1Stream::getHex()
{
   flush();
   return SHA1Buffer::getHex();
   //return mStreambuf.getHex();
}

Data
SHA1Stream::getBin(unsigned int bits)
{
   flush();
   return SHA1Buffer::getBin(bits);
}

UInt32
SHA1Stream::getUInt32()
{
   flush();
   UInt32 input = *((UInt32*)getBin(32).c_str());
   return ntohl(input);
}


#endif // USE_SSL

/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
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