DwmCredenceXChaCha20Poly1305OutBuffer.hh

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//===========================================================================
// @(#) $DwmPath$
//===========================================================================
//  Copyright (c) Daniel W. McRobb 2022
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//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
 
#ifndef _DWMCREDENCEXCHACHA20POLY1305OUTBUFFER_HH_
#define _DWMCREDENCEXCHACHA20POLY1305OUTBUFFER_HH_
 
#include <iostream>
#include <string>
 
namespace Dwm {
 
  namespace Credence {
 
    namespace XChaCha20Poly1305 {
 
      //----------------------------------------------------------------------
      //----------------------------------------------------------------------
      class OutBuffer
        : public std::streambuf
      {
      public:
        //--------------------------------------------------------------------
        //--------------------------------------------------------------------
        OutBuffer(std::ostream & os, const std::string & key);
        
      protected:
        int_type overflow(int_type c) override;
        int sync() override;
        std::streamsize xsputn(const char *p, std::streamsize n) override;
 
      private:
        std::ostream    & _os;
        std::string       _key;
        std::string       _plainbuf;
      };
      
 
    }  // namespace XChaCha20Poly1305
 
  }  // namespace Credence
 
}  // namespace Dwm
      
#endif  // _DWMCREDENCEXCHACHA20POLY1305OUTBUFFER_HH_