tdlight/td/mtproto/Handshake.h

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//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2024
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/mtproto/AuthKey.h"
#include "td/mtproto/RSA.h"
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#include "td/utils/common.h"
#include "td/utils/Slice.h"
#include "td/utils/Status.h"
#include "td/utils/StorerBase.h"
#include "td/utils/UInt.h"
namespace td {
namespace mtproto {
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class DhCallback;
class AuthKeyHandshakeContext {
public:
virtual ~AuthKeyHandshakeContext() = default;
virtual DhCallback *get_dh_callback() = 0;
virtual PublicRsaKeyInterface *get_public_rsa_key_interface() = 0;
};
class AuthKeyHandshake {
public:
class Callback {
public:
Callback() = default;
Callback(const Callback &) = delete;
Callback &operator=(const Callback &) = delete;
virtual ~Callback() = default;
virtual void send_no_crypto(const Storer &storer) = 0;
};
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AuthKeyHandshake(int32 dc_id, int32 expires_in);
void set_timeout_in(double timeout_in);
bool is_ready_for_finish() const;
void on_finish();
void resume(Callback *connection);
Status on_message(Slice message, Callback *connection, AuthKeyHandshakeContext *context) TD_WARN_UNUSED_RESULT;
void clear();
const AuthKey &get_auth_key() const {
return auth_key_;
}
AuthKey release_auth_key() {
return std::move(auth_key_);
}
double get_server_time_diff() const {
return server_time_diff_;
}
uint64 get_server_salt() const {
return server_salt_;
}
private:
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enum State : int32 { Start, ResPQ, ServerDHParams, DHGenResponse, Finish };
State state_ = Start;
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enum class Mode : int32 { Main, Temp };
Mode mode_ = Mode::Main;
int32 dc_id_ = 0;
int32 expires_in_ = 0;
double expires_at_ = 0;
double start_time_ = 0;
double timeout_in_ = 0;
AuthKey auth_key_;
double server_time_diff_ = 0;
uint64 server_salt_ = 0;
UInt128 nonce_;
UInt128 server_nonce_;
UInt256 new_nonce_;
string last_query_;
template <class T>
static string store_object(const T &object);
void send(Callback *connection, const Storer &storer);
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static void do_send(Callback *connection, const Storer &storer);
Status on_start(Callback *connection) TD_WARN_UNUSED_RESULT;
Status on_res_pq(Slice message, Callback *connection, PublicRsaKeyInterface *public_rsa_key) TD_WARN_UNUSED_RESULT;
Status on_server_dh_params(Slice message, Callback *connection, DhCallback *dh_callback) TD_WARN_UNUSED_RESULT;
Status on_dh_gen_response(Slice message, Callback *connection) TD_WARN_UNUSED_RESULT;
};
} // namespace mtproto
} // namespace td