Botan::TLS::Hello_Verify_Request Class Reference

#include <tls_messages.h>

Inheritance diagram for Botan::TLS::Hello_Verify_Request:

List of all members.

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

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Detailed Description

DTLS Hello Verify Request

Definition at line 39 of file tls_messages.h.

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Constructor & Destructor Documentation

Botan::TLS::Hello_Verify_Request::Hello_Verify_Request

(

const std::vector< byte > &

buf

)

Definition at line 16 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[3], &buf[buf.size()]);
   }

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

Definition at line 35 of file msg_hello_verify.cpp.

References Botan::get_mac(), and Botan::unlock().

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

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

   m_cookie = unlock(hmac->final());
   }

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Member Function Documentation

std::vector<byte> Botan::TLS::Hello_Verify_Request::cookie

(

)

const [inline]

Definition at line 45 of file tls_messages.h.

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

{ return m_cookie; }

std::vector< byte > Botan::TLS::Hello_Verify_Request::serialize

(

)

const [override, virtual]

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<byte> bits;
   bits.push_back(format_version.major_version());
   bits.push_back(format_version.minor_version());
   bits.push_back(static_cast<byte>(m_cookie.size()));
   bits += m_cookie;
   return bits;
   }

Handshake_Type Botan::TLS::Hello_Verify_Request::type

(

)

const [inline, override, virtual]

Implements Botan::TLS::Handshake_Message.

Definition at line 43 of file tls_messages.h.

References Botan::TLS::HELLO_VERIFY_REQUEST.

{ return HELLO_VERIFY_REQUEST; }

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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