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/*
* TLS Record Handling
* (C) 2004-2010 Jack Lloyd
*
* Released under the terms of the Botan license
*/
#ifndef BOTAN_TLS_RECORDS_H__
#define BOTAN_TLS_RECORDS_H__
#include <botan/tls_suites.h>
#include <botan/pipe.h>
#include <botan/mac.h>
#include <botan/secqueue.h>
#include <vector>
#if defined(BOTAN_USE_STD_TR1)
#if defined(BOTAN_BUILD_COMPILER_IS_MSVC)
#include <functional>
#else
#include <tr1/functional>
#endif
#elif defined(BOTAN_USE_BOOST_TR1)
#include <boost/tr1/functional.hpp>
#else
#error "No TR1 library defined for use"
#endif
namespace Botan {
using namespace std::tr1::placeholders;
class SessionKeys;
/**
* TLS Record Writer
*/
class BOTAN_DLL Record_Writer
{
public:
void send(byte type, const byte input[], size_t length);
void send(byte type, byte val) { send(type, &val, 1); }
void alert(Alert_Level level, Alert_Type type);
void activate(const TLS_Cipher_Suite& suite,
const SessionKeys& keys,
Connection_Side side);
void set_version(Version_Code version);
Version_Code get_version() const;
void reset();
void set_maximum_fragment_size(size_t max_fragment);
Record_Writer(std::tr1::function<void (const byte[], size_t)> output_fn);
~Record_Writer() { delete m_mac; }
private:
void send_record(byte type, const byte input[], size_t length);
std::tr1::function<void (const byte[], size_t)> m_output_fn;
Pipe m_cipher;
MessageAuthenticationCode* m_mac;
size_t m_block_size, m_mac_size, m_iv_size, m_max_fragment;
u64bit m_seq_no;
byte m_major, m_minor;
};
/**
* TLS Record Reader
*/
class BOTAN_DLL Record_Reader
{
public:
void add_input(const byte input[], size_t input_size);
/**
* @param msg_type (output variable)
* @param buffer (output variable)
* @return Number of bytes still needed (minimum), or 0 if success
*/
size_t get_record(byte& msg_type,
MemoryRegion<byte>& buffer);
SecureVector<byte> get_record(byte& msg_type);
void activate(const TLS_Cipher_Suite& suite,
const SessionKeys& keys,
Connection_Side side);
void set_version(Version_Code version);
Version_Code get_version() const;
void reset();
bool currently_empty() const { return input_queue.size() == 0; }
Record_Reader() { mac = 0; reset(); }
~Record_Reader() { delete mac; }
private:
SecureQueue input_queue;
Pipe cipher;
MessageAuthenticationCode* mac;
size_t block_size, mac_size, iv_size;
u64bit seq_no;
byte major, minor;
};
}
#endif
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