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/*
* TLS Messages
* (C) 2004-2011,2015 Jack Lloyd
* 2016 Matthias Gierlings
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_TLS_MESSAGES_H__
#define BOTAN_TLS_MESSAGES_H__
#include <botan/internal/tls_handshake_state.h>
#include <botan/internal/tls_extensions.h>
#include <botan/tls_handshake_msg.h>
#include <botan/tls_session.h>
#include <botan/tls_policy.h>
#include <botan/tls_ciphersuite.h>
#include <botan/bigint.h>
#include <botan/x509cert.h>
#include <vector>
#include <string>
#include <set>
namespace Botan {
class Credentials_Manager;
#if defined(BOTAN_HAS_SRP6)
class SRP6_Server_Session;
#endif
namespace TLS {
class Session;
class Handshake_IO;
std::vector<byte> make_hello_random(RandomNumberGenerator& rng,
const Policy& policy);
/**
* DTLS Hello Verify Request
*/
class BOTAN_DLL Hello_Verify_Request final : public Handshake_Message
{
public:
std::vector<byte> serialize() const override;
Handshake_Type type() const override { return HELLO_VERIFY_REQUEST; }
std::vector<byte> cookie() const { return m_cookie; }
explicit 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);
private:
std::vector<byte> m_cookie;
};
/**
* Client Hello Message
*/
class BOTAN_DLL Client_Hello final : public Handshake_Message
{
public:
class Settings
{
public:
Settings(const Protocol_Version version,
const std::string& hostname = "",
const std::string& srp_identifier = "")
: m_new_session_version(version),
m_hostname(hostname),
m_srp_identifier(srp_identifier) {};
const Protocol_Version protocol_version() const { return m_new_session_version; };
const std::string& hostname() const { return m_hostname; };
const std::string& srp_identifier() const { return m_srp_identifier; }
private:
const Protocol_Version m_new_session_version;
const std::string m_hostname;
const std::string m_srp_identifier;
};
Handshake_Type type() const override { return CLIENT_HELLO; }
Protocol_Version version() const { return m_version; }
const std::vector<byte>& random() const { return m_random; }
const std::vector<byte>& session_id() const { return m_session_id; }
std::vector<u16bit> ciphersuites() const { return m_suites; }
std::vector<byte> compression_methods() const { return m_comp_methods; }
bool offered_suite(u16bit ciphersuite) const;
bool sent_fallback_scsv() const;
std::vector<std::pair<std::string, std::string>> supported_algos() const
{
if(Signature_Algorithms* sigs = m_extensions.get<Signature_Algorithms>())
return sigs->supported_signature_algorthms();
return std::vector<std::pair<std::string, std::string>>();
}
std::set<std::string> supported_sig_algos() const
{
std::set<std::string> sig;
for(auto&& hash_and_sig : supported_algos())
sig.insert(hash_and_sig.second);
return sig;
}
std::vector<std::string> supported_ecc_curves() const
{
if(Supported_Elliptic_Curves* ecc = m_extensions.get<Supported_Elliptic_Curves>())
return ecc->curves();
return std::vector<std::string>();
}
bool prefers_compressed_ec_points() const
{
if(Supported_Point_Formats* ecc_formats = m_extensions.get<Supported_Point_Formats>())
{
return ecc_formats->prefers_compressed();
}
return false;
}
std::string sni_hostname() const
{
if(Server_Name_Indicator* sni = m_extensions.get<Server_Name_Indicator>())
return sni->host_name();
return "";
}
#if defined(BOTAN_HAS_SRP6)
std::string srp_identifier() const
{
if(SRP_Identifier* srp = m_extensions.get<SRP_Identifier>())
return srp->identifier();
return "";
}
#endif
bool secure_renegotiation() const
{
return m_extensions.has<Renegotiation_Extension>();
}
std::vector<byte> renegotiation_info() const
{
if(Renegotiation_Extension* reneg = m_extensions.get<Renegotiation_Extension>())
return reneg->renegotiation_info();
return std::vector<byte>();
}
bool supports_session_ticket() const
{
return m_extensions.has<Session_Ticket>();
}
std::vector<byte> session_ticket() const
{
if(Session_Ticket* ticket = m_extensions.get<Session_Ticket>())
return ticket->contents();
return std::vector<byte>();
}
bool supports_alpn() const
{
return m_extensions.has<Application_Layer_Protocol_Notification>();
}
bool supports_extended_master_secret() const
{
return m_extensions.has<Extended_Master_Secret>();
}
bool supports_encrypt_then_mac() const
{
return m_extensions.has<Encrypt_then_MAC>();
}
bool sent_signature_algorithms() const
{
return m_extensions.has<Signature_Algorithms>();
}
std::vector<std::string> next_protocols() const
{
if(auto alpn = m_extensions.get<Application_Layer_Protocol_Notification>())
return alpn->protocols();
return std::vector<std::string>();
}
std::vector<u16bit> srtp_profiles() const
{
if(SRTP_Protection_Profiles* srtp = m_extensions.get<SRTP_Protection_Profiles>())
return srtp->profiles();
return std::vector<u16bit>();
}
void update_hello_cookie(const Hello_Verify_Request& hello_verify);
std::set<Handshake_Extension_Type> extension_types() const
{ return m_extensions.extension_types(); }
Client_Hello(Handshake_IO& io,
Handshake_Hash& hash,
const Policy& policy,
RandomNumberGenerator& rng,
const std::vector<byte>& reneg_info,
const Client_Hello::Settings& client_settings,
const std::vector<std::string>& next_protocols);
Client_Hello(Handshake_IO& io,
Handshake_Hash& hash,
const Policy& policy,
RandomNumberGenerator& rng,
const std::vector<byte>& reneg_info,
const Session& resumed_session,
const std::vector<std::string>& next_protocols);
explicit Client_Hello(const std::vector<byte>& buf);
private:
std::vector<byte> serialize() const override;
Protocol_Version m_version;
std::vector<byte> m_session_id;
std::vector<byte> m_random;
std::vector<u16bit> m_suites;
std::vector<byte> m_comp_methods;
std::vector<byte> m_hello_cookie; // DTLS only
Extensions m_extensions;
};
/**
* Server Hello Message
*/
class BOTAN_DLL Server_Hello final : public Handshake_Message
{
public:
class Settings
{
public:
Settings(const std::vector<byte> new_session_id,
Protocol_Version new_session_version,
u16bit ciphersuite,
byte compression,
bool offer_session_ticket)
: m_new_session_id(new_session_id),
m_new_session_version(new_session_version),
m_ciphersuite(ciphersuite),
m_compression(compression),
m_offer_session_ticket(offer_session_ticket) {};
const std::vector<byte>& session_id() const { return m_new_session_id; };
Protocol_Version protocol_version() const { return m_new_session_version; };
u16bit ciphersuite() const { return m_ciphersuite; };
byte compression() const { return m_compression; }
bool offer_session_ticket() const { return m_offer_session_ticket; }
private:
const std::vector<byte> m_new_session_id;
Protocol_Version m_new_session_version;
u16bit m_ciphersuite;
byte m_compression;
bool m_offer_session_ticket;
};
Handshake_Type type() const override { return SERVER_HELLO; }
Protocol_Version version() const { return m_version; }
const std::vector<byte>& random() const { return m_random; }
const std::vector<byte>& session_id() const { return m_session_id; }
u16bit ciphersuite() const { return m_ciphersuite; }
byte compression_method() const { return m_comp_method; }
bool secure_renegotiation() const
{
return m_extensions.has<Renegotiation_Extension>();
}
std::vector<byte> renegotiation_info() const
{
if(Renegotiation_Extension* reneg = m_extensions.get<Renegotiation_Extension>())
return reneg->renegotiation_info();
return std::vector<byte>();
}
bool supports_extended_master_secret() const
{
return m_extensions.has<Extended_Master_Secret>();
}
bool supports_encrypt_then_mac() const
{
return m_extensions.has<Encrypt_then_MAC>();
}
bool supports_session_ticket() const
{
return m_extensions.has<Session_Ticket>();
}
u16bit srtp_profile() const
{
if(auto srtp = m_extensions.get<SRTP_Protection_Profiles>())
{
auto prof = srtp->profiles();
if(prof.size() != 1 || prof[0] == 0)
throw Decoding_Error("Server sent malformed DTLS-SRTP extension");
return prof[0];
}
return 0;
}
std::string next_protocol() const
{
if(auto alpn = m_extensions.get<Application_Layer_Protocol_Notification>())
return alpn->single_protocol();
return "";
}
std::set<Handshake_Extension_Type> extension_types() const
{ return m_extensions.extension_types(); }
bool prefers_compressed_ec_points() const
{
if(auto ecc_formats = m_extensions.get<Supported_Point_Formats>())
{
return ecc_formats->prefers_compressed();
}
return false;
}
Server_Hello(Handshake_IO& io,
Handshake_Hash& hash,
const Policy& policy,
RandomNumberGenerator& rng,
const std::vector<byte>& secure_reneg_info,
const Client_Hello& client_hello,
const Server_Hello::Settings& settings,
const std::string next_protocol);
Server_Hello(Handshake_IO& io,
Handshake_Hash& hash,
const Policy& policy,
RandomNumberGenerator& rng,
const std::vector<byte>& secure_reneg_info,
const Client_Hello& client_hello,
Session& resumed_session,
bool offer_session_ticket,
const std::string& next_protocol);
explicit Server_Hello(const std::vector<byte>& buf);
private:
std::vector<byte> serialize() const override;
Protocol_Version m_version;
std::vector<byte> m_session_id, m_random;
u16bit m_ciphersuite;
byte m_comp_method;
Extensions m_extensions;
};
/**
* Client Key Exchange Message
*/
class Client_Key_Exchange final : public Handshake_Message
{
public:
Handshake_Type type() const override { return CLIENT_KEX; }
const secure_vector<byte>& pre_master_secret() const
{ return m_pre_master; }
Client_Key_Exchange(Handshake_IO& io,
Handshake_State& state,
const Policy& policy,
Credentials_Manager& creds,
const Public_Key* server_public_key,
const std::string& hostname,
RandomNumberGenerator& rng);
Client_Key_Exchange(const std::vector<byte>& buf,
const Handshake_State& state,
const Private_Key* server_rsa_kex_key,
Credentials_Manager& creds,
const Policy& policy,
RandomNumberGenerator& rng);
private:
std::vector<byte> serialize() const override
{ return m_key_material; }
std::vector<byte> m_key_material;
secure_vector<byte> m_pre_master;
};
/**
* Certificate Message
*/
class Certificate final : public Handshake_Message
{
public:
Handshake_Type type() const override { return CERTIFICATE; }
const std::vector<X509_Certificate>& cert_chain() const { return m_certs; }
size_t count() const { return m_certs.size(); }
bool empty() const { return m_certs.empty(); }
Certificate(Handshake_IO& io,
Handshake_Hash& hash,
const std::vector<X509_Certificate>& certs);
explicit Certificate(const std::vector<byte>& buf, const Policy &policy);
private:
std::vector<byte> serialize() const override;
std::vector<X509_Certificate> m_certs;
};
/**
* Certificate Request Message
*/
class Certificate_Req final : public Handshake_Message
{
public:
Handshake_Type type() const override { return CERTIFICATE_REQUEST; }
const std::vector<std::string>& acceptable_cert_types() const
{ return m_cert_key_types; }
std::vector<X509_DN> acceptable_CAs() const { return m_names; }
std::vector<std::pair<std::string, std::string> > supported_algos() const
{ return m_supported_algos; }
Certificate_Req(Handshake_IO& io,
Handshake_Hash& hash,
const Policy& policy,
const std::vector<X509_DN>& allowed_cas,
Protocol_Version version);
Certificate_Req(const std::vector<byte>& buf,
Protocol_Version version);
private:
std::vector<byte> serialize() const override;
std::vector<X509_DN> m_names;
std::vector<std::string> m_cert_key_types;
std::vector<std::pair<std::string, std::string> > m_supported_algos;
};
/**
* Certificate Verify Message
*/
class BOTAN_DLL Certificate_Verify final : public Handshake_Message
{
public:
Handshake_Type type() const override { return CERTIFICATE_VERIFY; }
/**
* Check the signature on a certificate verify message
* @param cert the purported certificate
* @param state the handshake state
* @param policy the TLS policy
*/
bool verify(const X509_Certificate& cert,
const Handshake_State& state,
const Policy& policy) const;
Certificate_Verify(Handshake_IO& io,
Handshake_State& state,
const Policy& policy,
RandomNumberGenerator& rng,
const Private_Key* key);
Certificate_Verify(const std::vector<byte>& buf,
Protocol_Version version);
private:
std::vector<byte> serialize() const override;
std::string m_sig_algo; // sig algo used to create signature
std::string m_hash_algo; // hash used to create signature
std::vector<byte> m_signature;
};
/**
* Finished Message
*/
class Finished final : public Handshake_Message
{
public:
Handshake_Type type() const override { return FINISHED; }
std::vector<byte> verify_data() const
{ return m_verification_data; }
bool verify(const Handshake_State& state,
Connection_Side side) const;
Finished(Handshake_IO& io,
Handshake_State& state,
Connection_Side side);
explicit Finished(const std::vector<byte>& buf);
private:
std::vector<byte> serialize() const override;
std::vector<byte> m_verification_data;
};
/**
* Hello Request Message
*/
class BOTAN_DLL Hello_Request final : public Handshake_Message
{
public:
Handshake_Type type() const override { return HELLO_REQUEST; }
explicit Hello_Request(Handshake_IO& io);
explicit Hello_Request(const std::vector<byte>& buf);
private:
std::vector<byte> serialize() const override;
};
/**
* Server Key Exchange Message
*/
class Server_Key_Exchange final : public Handshake_Message
{
public:
Handshake_Type type() const override { return SERVER_KEX; }
const std::vector<byte>& params() const { return m_params; }
bool verify(const Public_Key& server_key,
const Handshake_State& state,
const Policy& policy) const;
// Only valid for certain kex types
const Private_Key& server_kex_key() const;
#if defined(BOTAN_HAS_SRP6)
// Only valid for SRP negotiation
SRP6_Server_Session& server_srp_params() const
{
BOTAN_ASSERT_NONNULL(m_srp_params);
return *m_srp_params;
}
#endif
Server_Key_Exchange(Handshake_IO& io,
Handshake_State& state,
const Policy& policy,
Credentials_Manager& creds,
RandomNumberGenerator& rng,
const Private_Key* signing_key = nullptr);
Server_Key_Exchange(const std::vector<byte>& buf,
const std::string& kex_alg,
const std::string& sig_alg,
Protocol_Version version);
~Server_Key_Exchange();
private:
std::vector<byte> serialize() const override;
#if defined(BOTAN_HAS_SRP6)
std::unique_ptr<SRP6_Server_Session> m_srp_params;
#endif
std::unique_ptr<Private_Key> m_kex_key;
std::vector<byte> m_params;
std::string m_sig_algo; // sig algo used to create signature
std::string m_hash_algo; // hash used to create signature
std::vector<byte> m_signature;
};
/**
* Server Hello Done Message
*/
class Server_Hello_Done final : public Handshake_Message
{
public:
Handshake_Type type() const override { return SERVER_HELLO_DONE; }
Server_Hello_Done(Handshake_IO& io, Handshake_Hash& hash);
explicit Server_Hello_Done(const std::vector<byte>& buf);
private:
std::vector<byte> serialize() const override;
};
/**
* New Session Ticket Message
*/
class BOTAN_DLL New_Session_Ticket final : public Handshake_Message
{
public:
Handshake_Type type() const override { return NEW_SESSION_TICKET; }
u32bit ticket_lifetime_hint() const { return m_ticket_lifetime_hint; }
const std::vector<byte>& ticket() const { return m_ticket; }
New_Session_Ticket(Handshake_IO& io,
Handshake_Hash& hash,
const std::vector<byte>& ticket,
u32bit lifetime);
New_Session_Ticket(Handshake_IO& io,
Handshake_Hash& hash);
explicit New_Session_Ticket(const std::vector<byte>& buf);
private:
std::vector<byte> serialize() const override;
u32bit m_ticket_lifetime_hint = 0;
std::vector<byte> m_ticket;
};
/**
* Change Cipher Spec
*/
class Change_Cipher_Spec final : public Handshake_Message
{
public:
Handshake_Type type() const override { return HANDSHAKE_CCS; }
std::vector<byte> serialize() const override
{ return std::vector<byte>(1, 1); }
};
}
}
#endif
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