/*
* Next Protocol Negotiation
* (C) 2012 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include <botan/internal/tls_messages.h>
#include <botan/internal/tls_extensions.h>
#include <botan/internal/tls_reader.h>
#include <botan/internal/tls_handshake_io.h>

namespace Botan {

namespace TLS {

Next_Protocol::Next_Protocol(Handshake_IO& io,
                             Handshake_Hash& hash,
                             const std::string& protocol) :
   m_protocol(protocol)
   {
   hash.update(io.send(*this));
   }

Next_Protocol::Next_Protocol(const std::vector<byte>& buf)
   {
   TLS_Data_Reader reader("NextProtocol", buf);

   m_protocol = reader.get_string(1, 0, 255);

   reader.get_range_vector<byte>(1, 0, 255); // padding, ignored
   }

std::vector<byte> Next_Protocol::serialize() const
   {
   std::vector<byte> buf;

   append_tls_length_value(buf,
                           reinterpret_cast<const byte*>(m_protocol.data()),
                           m_protocol.size(),
                           1);

   const byte padding_len = 32 - ((m_protocol.size() + 2) % 32);

   buf.push_back(padding_len);

   for(size_t i = 0; i != padding_len; ++i)
      buf.push_back(0);

   return buf;
   }

}

}