#include <tls_extensions.h>

Inheritance diagram for Botan::TLS::Supported_Groups:

Public Member Functions
std::vector< Group_Params >	dh_groups () const

std::vector< Group_Params >	ec_groups () const

bool	empty () const override

std::vector< uint8_t >	serialize (Connection_Side whoami) const override

	Supported_Groups (const std::vector< Group_Params > &groups)

	Supported_Groups (TLS_Data_Reader &reader, uint16_t extension_size)

Handshake_Extension_Type	type () const override

Static Public Member Functions
static Handshake_Extension_Type	static_type ()

Detailed Description

Supported Groups Extension (RFC 7919)

Definition at line 240 of file tls_extensions.h.

Constructor & Destructor Documentation

◆ Supported_Groups() [1/2]

Botan::TLS::Supported_Groups::Supported_Groups ( const std::vector< Group_Params > & groups )

explicit

Definition at line 310 of file tls_extensions.cpp.

                                                                        : m_groups(groups)
   {
   }

◆ Supported_Groups() [2/2]

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

Definition at line 357 of file tls_extensions.cpp.

   {
   const uint16_t len = reader.get_uint16_t();
 
   if(len + 2 != extension_size)
      throw Decoding_Error("Inconsistent length field in supported groups list");
 
   if(len % 2 == 1)
      throw Decoding_Error("Supported groups list of strange size");
 
   const size_t elems = len / 2;
 
   for(size_t i = 0; i != elems; ++i)
      {
      const uint16_t id = reader.get_uint16_t();
      m_groups.push_back(static_cast<Group_Params>(id));
      }
   }

References Botan::TLS::TLS_Data_Reader::get_uint16_t().

Member Function Documentation

◆ dh_groups()

std::vector< Group_Params > Botan::TLS::Supported_Groups::dh_groups ( ) const

Definition at line 325 of file tls_extensions.cpp.

   {
   std::vector<Group_Params> dh;
   for(auto g : m_groups)
      {
      if(group_param_is_dh(g) == true)
         dh.push_back(g);
      }
   return dh;
   }

References Botan::TLS::group_param_is_dh().

◆ ec_groups()

std::vector< Group_Params > Botan::TLS::Supported_Groups::ec_groups ( ) const

Definition at line 314 of file tls_extensions.cpp.

   {
   std::vector<Group_Params> ec;
   for(auto g : m_groups)
      {
      if(group_param_is_dh(g) == false)
         ec.push_back(g);
      }
   return ec;
   }

References Botan::TLS::group_param_is_dh().

◆ empty()

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

inlineoverridevirtual

Returns: if we should encode this extension or not

Implements Botan::TLS::Extension.

Definition at line 258 of file tls_extensions.h.

258{ return m_groups.empty(); }

◆ serialize()

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

overridevirtual

Returns: serialized binary for the extension

Implements Botan::TLS::Extension.

Definition at line 336 of file tls_extensions.cpp.

   {
   std::vector<uint8_t> buf(2);
 
   for(auto g : m_groups)
      {
      const uint16_t id = static_cast<uint16_t>(g);
 
      if(id > 0)
         {
         buf.push_back(get_byte(0, id));
         buf.push_back(get_byte(1, id));
         }
      }
 
   buf[0] = get_byte(0, static_cast<uint16_t>(buf.size()-2));
   buf[1] = get_byte(1, static_cast<uint16_t>(buf.size()-2));
 
   return buf;
   }