msg_key_update.cpp

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/*
* Key Update message
* (C) 2022 Jack Lloyd
*     2022 René Meusel, Hannes Rantzsch - neXenio GmbH
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
 
#include <botan/tls_messages.h>
 
#include <botan/tls_exceptn.h>
 
namespace Botan::TLS {
 
Key_Update::Key_Update(const bool request_peer_update) : m_update_requested(request_peer_update) {}
 
Key_Update::Key_Update(const std::vector<uint8_t>& buf) {
   if(buf.size() != 1) {
      throw TLS_Exception(Alert::DecodeError, "malformed key_update");
   }
 
   // RFC 8446 4.6.3
   //    If an implementation receives any other value [than 0 or 1], it MUST
   //    terminate the connection with an "illegal_parameter" alert.
   const uint8_t update_requested = buf.at(0);
   if(update_requested > 1) {
      throw TLS_Exception(Alert::IllegalParameter, "unexpected key_update parameter");
   }
 
   m_update_requested = update_requested == 1;
}
 
std::vector<uint8_t> Key_Update::serialize() const {
   return std::vector<uint8_t>(1, (m_update_requested ? 1 : 0));
}
 
}  // namespace Botan::TLS