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/*
* TLS Session
* (C) 2011-2012 Jack Lloyd
*
* Released under the terms of the Botan license
*/
#ifndef TLS_SESSION_STATE_H__
#define TLS_SESSION_STATE_H__
#include <botan/x509cert.h>
#include <botan/tls_magic.h>
#include <botan/secmem.h>
#include <botan/symkey.h>
namespace Botan {
/**
* Class representing a TLS session state
*/
class BOTAN_DLL TLS_Session
{
public:
/**
* Uninitialized session
*/
TLS_Session() :
m_start_time(0),
m_version(0),
m_ciphersuite(0),
m_compression_method(0),
m_connection_side(static_cast<Connection_Side>(0)),
m_secure_renegotiation_supported(false),
m_fragment_size(0)
{}
/**
* New session (sets session start time)
*/
TLS_Session(const MemoryRegion<byte>& session_id,
const MemoryRegion<byte>& master_secret,
Version_Code version,
u16bit ciphersuite,
byte compression_method,
Connection_Side side,
bool secure_renegotiation_supported,
size_t fragment_size,
const std::vector<X509_Certificate>& peer_certs,
const std::string& sni_hostname = "",
const std::string& srp_identifier = "");
/**
* Load a session from BER (created by BER_encode)
*/
TLS_Session(const byte ber[], size_t ber_len);
/**
* Encrypt a session (useful for serialization or session tickets)
*/
MemoryVector<byte> encrypt(const SymmetricKey& key,
const MemoryRegion<byte>& key_name,
RandomNumberGenerator& rng);
static TLS_Session decrypt(const MemoryRegion<byte>& ctext,
const SymmetricKey& key,
const MemoryRegion<byte>& key_name);
/**
* Encode this session data for storage
* @warning if the master secret is compromised so is the
* session traffic
*/
SecureVector<byte> BER_encode() const;
/**
* Get the version of the saved session
*/
Version_Code version() const
{ return static_cast<Version_Code>(m_version); }
/**
* Get the ciphersuite of the saved session
*/
u16bit ciphersuite() const { return m_ciphersuite; }
/**
* Get the compression method used in the saved session
*/
byte compression_method() const { return m_compression_method; }
/**
* Get which side of the connection the resumed session we are/were
* acting as.
*/
Connection_Side side() const { return m_connection_side; }
/**
* Get the SNI hostname (if sent by the client in the initial handshake)
*/
std::string sni_hostname() const { return m_sni_hostname; }
/**
* Get the SRP identity (if sent by the client in the initial handshake)
*/
std::string srp_identifier() const { return m_srp_identifier; }
/**
* Get the saved master secret
*/
const SecureVector<byte>& master_secret() const
{ return m_master_secret; }
/**
* Get the session identifier
*/
const MemoryVector<byte>& session_id() const
{ return m_identifier; }
/**
* Get the negotiated maximum fragment size (or 0 if default)
*/
size_t fragment_size() const { return m_fragment_size; }
/**
* Is secure renegotiation supported?
*/
bool secure_renegotiation() const
{ return m_secure_renegotiation_supported; }
/**
* Get the time this session began (seconds since Epoch)
*/
u64bit start_time() const { return m_start_time; }
private:
enum { TLS_SESSION_PARAM_STRUCT_VERSION = 1 };
u64bit m_start_time;
MemoryVector<byte> m_identifier;
SecureVector<byte> m_master_secret;
u16bit m_version;
u16bit m_ciphersuite;
byte m_compression_method;
Connection_Side m_connection_side;
bool m_secure_renegotiation_supported;
size_t m_fragment_size;
MemoryVector<byte> m_peer_certificate; // optional
std::string m_sni_hostname; // optional
std::string m_srp_identifier; // optional
};
}
#endif
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