109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#pragma once
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#include "td/mtproto/AuthKey.h"
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#include "td/mtproto/crypto.h"
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#include "td/mtproto/DhHandshake.h"
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#include "td/utils/buffer.h"
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#include "td/utils/Slice.h"
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#include "td/utils/Status.h"
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#include "td/utils/StorerBase.h"
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#include "td/utils/UInt.h"
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namespace td {
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namespace mtproto {
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class AuthKeyHandshakeContext {
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public:
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virtual ~AuthKeyHandshakeContext() = default;
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virtual DhCallback *get_dh_callback() = 0;
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virtual PublicRsaKeyInterface *get_public_rsa_key_interface() = 0;
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};
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class AuthKeyHandshake {
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public:
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class Callback {
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public:
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Callback() = default;
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Callback(const Callback &) = delete;
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Callback &operator=(const Callback &) = delete;
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virtual ~Callback() = default;
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virtual void send_no_crypto(const Storer &storer) = 0;
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};
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using Context = AuthKeyHandshakeContext;
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enum class Mode { Unknown, Main, Temp };
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AuthKey auth_key;
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double server_time_diff = 0;
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uint64 server_salt = 0;
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bool is_ready_for_start() const;
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Status start_main(Callback *connection) TD_WARN_UNUSED_RESULT;
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Status start_tmp(Callback *connection, int32 expires_in) TD_WARN_UNUSED_RESULT;
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bool is_ready_for_message(const UInt128 &message_nonce) const;
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bool is_ready_for_finish() const;
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void on_finish();
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AuthKeyHandshake(int32 dc_id, int32 expires_in) {
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dc_id_ = dc_id;
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if (expires_in == 0) {
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mode_ = Mode::Main;
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} else {
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mode_ = Mode::Temp;
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expires_in_ = expires_in;
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}
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}
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void init_main() {
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clear();
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mode_ = Mode::Main;
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}
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void init_temp(int32 expires_in) {
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clear();
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mode_ = Mode::Temp;
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expires_in_ = expires_in;
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}
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void resume(Callback *connection);
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Status on_message(Slice message, Callback *connection, Context *context) TD_WARN_UNUSED_RESULT;
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bool is_ready() const {
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return is_ready_for_finish();
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}
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void clear();
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private:
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using State = enum { Start, ResPQ, ServerDHParams, DHGenResponse, Finish };
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State state_ = Start;
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Mode mode_ = Mode::Unknown;
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int32 dc_id_ = 0;
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int32 expires_in_ = 0;
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double expires_at_ = 0;
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UInt128 nonce;
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UInt128 server_nonce;
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UInt256 new_nonce;
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UInt256 tmp_aes_key;
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UInt256 tmp_aes_iv;
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BufferSlice last_query_;
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template <class DataT>
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Result<size_t> fill_data_with_hash(uint8 *data_with_hash, const DataT &data) TD_WARN_UNUSED_RESULT;
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void send(Callback *connection, const Storer &storer);
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void do_send(Callback *connection, const Storer &storer);
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Status on_start(Callback *connection) TD_WARN_UNUSED_RESULT;
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Status on_res_pq(Slice message, Callback *connection, PublicRsaKeyInterface *public_rsa_key) TD_WARN_UNUSED_RESULT;
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Status on_server_dh_params(Slice message, Callback *connection, DhCallback *dh_callback) TD_WARN_UNUSED_RESULT;
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Status on_dh_gen_response(Slice message, Callback *connection) TD_WARN_UNUSED_RESULT;
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};
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} // namespace mtproto
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} // namespace td
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