Botan::TLS::Hello_Verify_Request Class Reference

#include <tls_messages.h>

Inheritance diagram for Botan::TLS::Hello_Verify_Request:

Public Member Functions
const std::vector< uint8_t > &	cookie () const
	Hello_Verify_Request (const std::vector< uint8_t > &buf)
	Hello_Verify_Request (const std::vector< uint8_t > &client_hello_bits, const std::string &client_identity, const SymmetricKey &secret_key)
std::vector< uint8_t >	serialize () const override
Handshake_Type	type () const override
std::string	type_string () const

Detailed Description

DTLS Hello Verify Request

Definition at line 50 of file tls_messages.h.

Constructor & Destructor Documentation

Botan::TLS::Hello_Verify_Request::Hello_Verify_Request ( const std::vector< uint8_t > &  buf )

explicit

Definition at line 15 of file msg_hello_verify.cpp.

References Botan::TLS::Protocol_Version::DTLS_V10, and Botan::TLS::Protocol_Version::DTLS_V12.

   {
   if(buf.size() < 3)
      throw Decoding_Error("Hello verify request too small");

   Protocol_Version version(buf[0], buf[1]);

   if(version != Protocol_Version::DTLS_V10 &&
      version != Protocol_Version::DTLS_V12)
      {
      throw Decoding_Error("Unknown version from server in hello verify request");
      }

   if(static_cast<size_t>(buf[2]) + 3 != buf.size())
      throw Decoding_Error("Bad length in hello verify request");

   m_cookie.assign(buf.begin() + 3, buf.end());
   }

Botan::TLS::Hello_Verify_Request::Hello_Verify_Request	(	const std::vector< uint8_t > &	client_hello_bits,
		const std::string &	client_identity,
		const SymmetricKey &	secret_key
	)

Definition at line 34 of file msg_hello_verify.cpp.

References Botan::MessageAuthenticationCode::create_or_throw().

   {
   std::unique_ptr<MessageAuthenticationCode> hmac = MessageAuthenticationCode::create_or_throw("HMAC(SHA-256)");
   hmac->set_key(secret_key);

   hmac->update_be(static_cast<uint64_t>(client_hello_bits.size()));
   hmac->update(client_hello_bits);
   hmac->update_be(static_cast<uint64_t>(client_identity.size()));
   hmac->update(client_identity);

   m_cookie.resize(hmac->output_length());
   hmac->final(m_cookie.data());
   }

Member Function Documentation

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

inline

Definition at line 56 of file tls_messages.h.

Referenced by Botan::TLS::Client_Hello::update_hello_cookie().

{ return m_cookie; }

std::vector< uint8_t > Botan::TLS::Hello_Verify_Request::serialize ( ) const

overridevirtual

Returns

DER representation of this message

Implements Botan::TLS::Handshake_Message.

Definition at line 50 of file msg_hello_verify.cpp.

References Botan::TLS::Protocol_Version::DTLS_V10, Botan::TLS::Protocol_Version::major_version(), and Botan::TLS::Protocol_Version::minor_version().

   {
   /* DTLS 1.2 server implementations SHOULD use DTLS version 1.0
      regardless of the version of TLS that is expected to be
      negotiated (RFC 6347, section 4.2.1)
   */

   Protocol_Version format_version(Protocol_Version::DTLS_V10);

   std::vector<uint8_t> bits;
   bits.push_back(format_version.major_version());
   bits.push_back(format_version.minor_version());
   bits.push_back(static_cast<uint8_t>(m_cookie.size()));
   bits += m_cookie;
   return bits;
   }

Handshake_Type Botan::TLS::Hello_Verify_Request::type ( ) const

inlineoverridevirtual

Returns

the message type

Implements Botan::TLS::Handshake_Message.

Definition at line 54 of file tls_messages.h.

References Botan::TLS::HELLO_VERIFY_REQUEST.

{ return HELLO_VERIFY_REQUEST; }

std::string Botan::TLS::Handshake_Message::type_string ( ) const

inherited

Returns

string representation of this message type

Definition at line 19 of file tls_handshake_state.cpp.

References Botan::TLS::handshake_type_to_string(), and Botan::TLS::Handshake_Message::type().

   {
   return handshake_type_to_string(type());
   }

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The documentation for this class was generated from the following files:

• src/lib/tls/tls_messages.h
• src/lib/tls/msg_hello_verify.cpp