9#include <botan/tls_messages.h>
10#include <botan/tls_extensions.h>
13#include <botan/internal/tls_reader.h>
14#include <botan/internal/tls_handshake_io.h>
15#include <botan/internal/tls_handshake_state.h>
16#include <botan/internal/tls_handshake_hash.h>
17#include <botan/credentials_manager.h>
18#include <botan/internal/ct_utils.h>
22#if defined(BOTAN_HAS_CECPQ1)
23 #include <botan/cecpq1.h>
36 const std::string& hostname,
43 std::string identity_hint =
"";
48 identity_hint = reader.
get_string(2, 0, 65535);
51 const std::string psk_identity =
52 creds.
psk_identity(
"tls-client", hostname, identity_hint);
58 std::vector<uint8_t> zeros(psk.
length());
71 std::string identity_hint = reader.
get_string(2, 0, 65535);
73 const std::string psk_identity =
74 creds.
psk_identity(
"tls-client", hostname, identity_hint);
78 psk = creds.
psk(
"tls-client", hostname, psk_identity);
83 const std::vector<uint8_t> modulus = reader.
get_range<uint8_t>(2, 1, 65535);
84 const std::vector<uint8_t> generator = reader.
get_range<uint8_t>(2, 1, 65535);
85 const std::vector<uint8_t> peer_public_value = reader.
get_range<uint8_t>(2, 1, 65535);
90 const std::pair<secure_vector<uint8_t>, std::vector<uint8_t>> dh_result =
94 m_pre_master = dh_result.first;
106 const uint8_t curve_type = reader.
get_byte();
111 const std::vector<uint8_t> peer_public_value = reader.
get_range<uint8_t>(1, 1, 255);
116 "Server sent ECC curve prohibited by policy");
121 if(curve_name.empty())
125 const std::pair<secure_vector<uint8_t>, std::vector<uint8_t>> ecdh_result =
131 m_pre_master = ecdh_result.first;
141#if defined(BOTAN_HAS_CECPQ1)
144 const std::vector<uint8_t> cecpq1_offer = reader.get_range<uint8_t>(2, 1, 65535);
151 CECPQ1_accept(shared_secret.data(), newhope_accept.data(), cecpq1_offer.data(), rng);
153 m_pre_master = shared_secret;
158 throw Internal_Error(
"Client_Key_Exchange: Unknown key exchange method was negotiated");
161 reader.assert_done();
168 throw Unexpected_Message(
"No server kex message, but negotiated a key exchange that required it");
175 const Protocol_Version offered_version = state.client_hello()->legacy_version();
177 rng.random_vec(m_pre_master, 48);
183 const std::vector<uint8_t> encrypted_key = encryptor.encrypt(m_pre_master, rng);
189 "Expected a RSA key in server cert but got " +
193 state.hash().update(io.send(*
this));
199Client_Key_Exchange::Client_Key_Exchange(
const std::vector<uint8_t>& contents,
208 if(kex_algo == Kex_Algo::STATIC_RSA)
211 "RSA key exchange negotiated so server sent a certificate");
213 if(!server_rsa_kex_key)
214 throw Internal_Error(
"Expected RSA kex but no server kex key set");
216 if(server_rsa_kex_key->
algo_name() !=
"RSA")
220 const std::vector<uint8_t> encrypted_pre_master = reader.
get_range<uint8_t>(2, 0, 65535);
225 const uint8_t client_major = state.
client_hello()->legacy_version().major_version();
226 const uint8_t client_minor = state.
client_hello()->legacy_version().minor_version();
234 const size_t expected_plaintext_size = 48;
235 const size_t expected_content_size = 2;
236 const uint8_t expected_content_bytes[expected_content_size] = { client_major, client_minor };
237 const uint8_t expected_content_pos[expected_content_size] = { 0, 1 };
241 encrypted_pre_master.size(),
242 expected_plaintext_size,
244 expected_content_bytes,
245 expected_content_pos,
246 expected_content_size);
256 const std::string psk_identity = reader.
get_string(2, 0, 65535);
258 psk = creds.
psk(
"tls-server",
268 "No PSK for identifier " + psk_identity);
272 if(kex_algo == Kex_Algo::PSK)
274 std::vector<uint8_t> zeros(psk.
length());
278#if defined(BOTAN_HAS_CECPQ1)
279 else if(kex_algo == Kex_Algo::CECPQ1)
283 const std::vector<uint8_t> cecpq1_accept = reader.
get_range<uint8_t>(2, 0, 65535);
288 CECPQ1_finish(m_pre_master.data(), cecpq1_offer, cecpq1_accept.data());
291 else if(kex_algo == Kex_Algo::DH ||
292 kex_algo == Kex_Algo::ECDH ||
293 kex_algo == Kex_Algo::ECDHE_PSK)
304 std::vector<uint8_t> client_pubkey;
308 client_pubkey = reader.
get_range<uint8_t>(2, 0, 65535);
312 client_pubkey = reader.
get_range<uint8_t>(1, 1, 255);
324 if(kex_algo == Kex_Algo::ECDHE_PSK)
330 m_pre_master = shared_secret;
336 catch(std::exception&)
350 throw Internal_Error(
"Client_Key_Exchange: Unknown key exchange negotiated");
#define BOTAN_ASSERT(expr, assertion_made)
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)
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
virtual std::vector< uint8_t > public_value() const =0
SymmetricKey derive_key(size_t key_len, const uint8_t in[], size_t in_len, const uint8_t params[], size_t params_len) const
virtual std::string algo_name() const =0
secure_vector< uint8_t > random_vec(size_t bytes)
virtual std::string tls_decode_group_param(Group_Params group_param)
virtual std::pair< secure_vector< uint8_t >, std::vector< uint8_t > > tls_dh_agree(const std::vector< uint8_t > &modulus, const std::vector< uint8_t > &generator, const std::vector< uint8_t > &peer_public_value, const Policy &policy, RandomNumberGenerator &rng)
virtual std::pair< secure_vector< uint8_t >, std::vector< uint8_t > > tls_ecdh_agree(const std::string &curve_name, const std::vector< uint8_t > &peer_public_value, const Policy &policy, RandomNumberGenerator &rng, bool compressed)
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, const std::string &hostname, RandomNumberGenerator &rng)
void server_certs(Certificate_12 *server_certs)
void server_hello(Server_Hello_12 *server_hello)
void server_kex(Server_Key_Exchange *server_kex)
Callbacks & callbacks() const
const Ciphersuite & ciphersuite() const
void client_hello(Client_Hello_12 *client_hello)
virtual bool hide_unknown_users() const
virtual Group_Params choose_key_exchange_group(const std::vector< Group_Params > &peer_groups) 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
std::string to_string(const BER_Object &obj)
secure_vector< uint8_t > strip_leading_zeros(const uint8_t in[], size_t length)
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)
void CECPQ1_finish(uint8_t shared_key[CECPQ1_SHARED_KEY_BYTES], const CECPQ1_key &offer_key, const uint8_t received[CECPQ1_ACCEPT_BYTES])
@ CECPQ1_SHARED_KEY_BYTES
void CECPQ1_accept(uint8_t shared_key[CECPQ1_SHARED_KEY_BYTES], uint8_t send[CECPQ1_ACCEPT_BYTES], const uint8_t received[CECPQ1_OFFER_BYTES], RandomNumberGenerator &rng)
std::vector< T, secure_allocator< T > > secure_vector
std::unique_ptr< Public_Key > server_public_key