#include <tls_extensions_13.h>

Inheritance diagram for Botan::TLS::Cookie:

Public Member Functions
	Cookie (const std::vector< uint8_t > &cookie)
	Cookie (TLS_Data_Reader &reader, uint16_t extension_size)
bool	empty () const override
const std::vector< uint8_t > &	get_cookie () const
virtual bool	is_implemented () const
std::vector< uint8_t >	serialize (Connection_Side whoami) const override
Extension_Code	type () const override

Static Public Member Functions
static Extension_Code	static_type ()

Detailed Description

Cookie from RFC 8446 4.2.2

Definition at line 42 of file tls_extensions_13.h.

Constructor & Destructor Documentation

◆ Cookie() [1/2]

Botan::TLS::Cookie::Cookie ( const std::vector< uint8_t > & cookie )

explicit

Definition at line 24 of file tls_extensions_13.cpp.

24: m_cookie(cookie) {}

◆ Cookie() [2/2]

Botan::TLS::Cookie::Cookie	(	TLS_Data_Reader &	reader,
		uint16_t	extension_size )

explicit

Definition at line 26 of file tls_extensions_13.cpp.

                                                               {
   if(extension_size == 0) {
      return;
   }
 
   const uint16_t len = reader.get_uint16_t();
 
   if(len == 0) {
      // Based on RFC 8446 4.2.2, len of the Cookie buffer must be at least 1
      throw Decoding_Error("Cookie length must be at least 1 byte");
   }
 
   if(len > reader.remaining_bytes()) {
      throw Decoding_Error("Not enough bytes in the buffer to decode Cookie");
   }
 
   for(size_t i = 0; i < len; ++i) {
      m_cookie.push_back(reader.get_byte());
   }
}

References Botan::TLS::TLS_Data_Reader::get_byte(), Botan::TLS::TLS_Data_Reader::get_uint16_t(), and Botan::TLS::TLS_Data_Reader::remaining_bytes().

Member Function Documentation

◆ empty()

bool Botan::TLS::Cookie::empty ( ) const

inlineoverridevirtual

Returns: if we should encode this extension or not

Implements Botan::TLS::Extension.

Definition at line 50 of file tls_extensions_13.h.

50{ return m_cookie.empty(); }

◆ get_cookie()

const std::vector< uint8_t > & Botan::TLS::Cookie::get_cookie ( ) const

inline

Definition at line 52 of file tls_extensions_13.h.

52{ return m_cookie; }

Referenced by Botan::TLS::Client_Hello_13::retry().

◆ is_implemented()

virtual bool Botan::TLS::Extension::is_implemented ( ) const

inlinevirtualinherited

Returns: true if this extension is known and implemented by Botan

Reimplemented in Botan::TLS::Unknown_Extension.

Definition at line 95 of file tls_extensions.h.

95{ return true; }

◆ serialize()

std::vector< uint8_t > Botan::TLS::Cookie::serialize ( Connection_Side whoami ) const

overridevirtual

Returns: serialized binary for the extension

Implements Botan::TLS::Extension.

Definition at line 47 of file tls_extensions_13.cpp.

                                                            {
   std::vector<uint8_t> buf;
 
   const uint16_t len = static_cast<uint16_t>(m_cookie.size());
 
   buf.push_back(get_byte<0>(len));
   buf.push_back(get_byte<1>(len));
 
   for(const auto& cookie_byte : m_cookie) {
      buf.push_back(cookie_byte);
   }
 
   return buf;
}