9#include <botan/tls_messages.h>
11#include <botan/credentials_manager.h>
12#include <botan/ecdh.h>
15#include <botan/tls_extensions.h>
16#include <botan/internal/ct_utils.h>
17#include <botan/internal/tls_handshake_hash.h>
18#include <botan/internal/tls_handshake_io.h>
19#include <botan/internal/tls_handshake_state.h>
20#include <botan/internal/tls_reader.h>
32 std::string_view hostname,
37 std::string identity_hint;
41 identity_hint = reader.
get_string(2, 0, 65535);
44 m_psk_identity = creds.
psk_identity(
"tls-client", std::string(hostname), identity_hint);
48 SymmetricKey psk = creds.
psk(
"tls-client", std::string(hostname), m_psk_identity.value());
50 std::vector<uint8_t> zeros(psk.
length());
60 std::string identity_hint = reader.
get_string(2, 0, 65535);
62 m_psk_identity = creds.
psk_identity(
"tls-client", std::string(hostname), identity_hint);
66 psk = creds.
psk(
"tls-client", std::string(hostname), m_psk_identity.value());
72 const std::vector<uint8_t> peer_public_value = reader.
get_range<uint8_t>(2, 1, 65535);
81 throw TLS_Exception(Alert::InsufficientSecurity,
"DH group validation failed");
89 const uint8_t curve_type = reader.
get_byte();
95 const std::vector<uint8_t> peer_public_value = reader.
get_range<uint8_t>(1, 1, 255);
99 "Server selected a group that is not compatible with the negotiated ciphersuite");
103 throw TLS_Exception(Alert::HandshakeFailure,
"Server sent ECC curve prohibited by policy");
111 m_pre_master = std::move(shared_secret);
118 auto* ecdh_key =
dynamic_cast<ECDH_PublicKey*
>(private_key.get());
119 if(ecdh_key ==
nullptr) {
120 throw TLS_Exception(Alert::InternalError,
"Application did not provide a ECDH_PublicKey");
123 ecdh_key->public_value(state.
server_hello()->prefers_compressed_ec_points()
131 throw Internal_Error(
"Client_Key_Exchange: Unknown key exchange method was negotiated");
139 throw Unexpected_Message(
"No server kex message, but negotiated a key exchange that required it");
142 if(server_public_key ==
nullptr) {
146 if(
const auto* rsa_pub =
dynamic_cast<const RSA_PublicKey*
>(server_public_key)) {
155 const std::vector<uint8_t> encrypted_key = encryptor.
encrypt(m_pre_master, rng);
160 "Expected a RSA key in server cert but got " + server_public_key->
algo_name());
180 "RSA key exchange negotiated so server sent a certificate");
182 if(server_rsa_kex_key ==
nullptr) {
183 throw Internal_Error(
"Expected RSA kex but no server kex key set");
186 if(server_rsa_kex_key->
algo_name() !=
"RSA") {
191 const std::vector<uint8_t> encrypted_pre_master = reader.
get_range<uint8_t>(2, 0, 65535);
196 const uint8_t client_major = state.
client_hello()->legacy_version().major_version();
197 const uint8_t client_minor = state.
client_hello()->legacy_version().minor_version();
205 const size_t expected_plaintext_size = 48;
206 const size_t expected_content_size = 2;
207 const uint8_t expected_content_bytes[expected_content_size] = {client_major, client_minor};
208 const uint8_t expected_content_pos[expected_content_size] = {0, 1};
211 encrypted_pre_master.size(),
212 expected_plaintext_size,
214 expected_content_bytes,
215 expected_content_pos,
216 expected_content_size);
223 m_psk_identity = reader.
get_string(2, 0, 65535);
225 psk = creds.
psk(
"tls-server", state.
client_hello()->sni_hostname(), m_psk_identity.value());
231 throw TLS_Exception(Alert::UnknownPSKIdentity,
"No PSK for identifier " + m_psk_identity.value());
237 std::vector<uint8_t> zeros(psk.
length());
243 const std::vector<uint8_t> client_pubkey = (ka_key.
algo_name() ==
"DH")
247 const auto shared_group = state.
server_kex()->shared_group();
262 m_pre_master = shared_secret;
269 }
catch(std::exception&) {
281 throw Internal_Error(
"Client_Key_Exchange: Unknown key exchange negotiated");
#define BOTAN_STATE_CHECK(expr)
#define BOTAN_ASSERT(expr, assertion_made)
virtual std::string algo_name() const =0
static BigInt from_bytes(std::span< const uint8_t > bytes)
virtual std::string psk_identity(const std::string &type, const std::string &context, const std::string &identity_hint)
virtual SymmetricKey psk(const std::string &type, const std::string &context, const std::string &identity)
bool verify_group(RandomNumberGenerator &rng, bool strong=true) const
const char * what() const noexcept override
secure_vector< uint8_t > bits_of() const
secure_vector< uint8_t > decrypt_or_random(const uint8_t in[], size_t length, size_t expected_pt_len, RandomNumberGenerator &rng) const
std::vector< uint8_t > encrypt(const uint8_t in[], size_t length, RandomNumberGenerator &rng) const
virtual std::vector< uint8_t > public_value() const =0
void random_vec(std::span< uint8_t > v)
virtual secure_vector< uint8_t > tls_ephemeral_key_agreement(const std::variant< TLS::Group_Params, DL_Group > &group, const PK_Key_Agreement_Key &private_key, const std::vector< uint8_t > &public_value, RandomNumberGenerator &rng, const Policy &policy)
virtual std::unique_ptr< PK_Key_Agreement_Key > tls_generate_ephemeral_key(const std::variant< TLS::Group_Params, DL_Group > &group, RandomNumberGenerator &rng)
Kex_Algo kex_method() const
Client_Key_Exchange(Handshake_IO &io, Handshake_State &state, const Policy &policy, Credentials_Manager &creds, const Public_Key *server_public_key, std::string_view hostname, RandomNumberGenerator &rng)
constexpr bool is_ecdh_named_curve() const
constexpr bool is_x448() const
constexpr bool is_x25519() const
void update(const uint8_t in[], size_t length)
virtual std::vector< uint8_t > send(const Handshake_Message &msg)=0
void client_hello(std::unique_ptr< Client_Hello_12 > client_hello)
Callbacks & callbacks() const
void server_hello(std::unique_ptr< Server_Hello_12 > server_hello)
const Ciphersuite & ciphersuite() const
void server_kex(std::unique_ptr< Server_Key_Exchange > server_kex)
void server_certs(std::unique_ptr< Certificate_12 > server_certs)
virtual bool hide_unknown_users() const
virtual Group_Params choose_key_exchange_group(const std::vector< Group_Params > &supported_by_peer, const std::vector< Group_Params > &offered_by_peer) const
uint8_t major_version() const
uint8_t minor_version() const
std::string get_string(size_t len_bytes, size_t min_bytes, size_t max_bytes)
std::vector< T > get_range(size_t len_bytes, size_t min_elems, size_t max_elems)
size_t remaining_bytes() const
secure_vector< uint8_t > strip_leading_zeros(std::span< const uint8_t > input)
void append_tls_length_value(std::vector< uint8_t, Alloc > &buf, const T *vals, size_t vals_size, size_t tag_size)
bool key_exchange_is_psk(Kex_Algo m)
std::span< const uint8_t > as_span_of_bytes(const char *s, size_t len)