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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_session_key.h>
#include <botan/tls_suites.h>
#include <botan/socket.h>
#include <botan/pipe.h>
#include <botan/mac.h>
#include <botan/secqueue.h>
#include <vector>
#include <functional>
using namespace std::placeholders;
namespace Botan {
/**
* 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 flush();
void alert(Alert_Level, Alert_Type);
void set_keys(const CipherSuite&, const SessionKeys&, Connection_Side);
void set_version(Version_Code);
void reset();
Record_Writer(std::function<void (const byte[], size_t)> output_fn);
~Record_Writer() { delete mac; }
private:
void send_record(byte type, const byte input[], size_t length);
void send_record(byte type, byte major, byte minor,
const byte input[], size_t length);
std::function<void (const byte[], size_t)> output_fn;
Pipe cipher;
MessageAuthenticationCode* mac;
SecureVector<byte> buffer;
size_t buf_pos;
size_t block_size, mac_size, iv_size;
u64bit seq_no;
byte major, minor, buf_type;
};
/**
* 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 set_keys(const CipherSuite& suite,
const SessionKeys& keys,
Connection_Side side);
void set_version(Version_Code version);
void reset();
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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