140 lines
4.0 KiB
C++
140 lines
4.0 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2022
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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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#include "td/telegram/net/PublicRsaKeyWatchdog.h"
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#include "td/telegram/Global.h"
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#include "td/telegram/net/NetQueryCreator.h"
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#include "td/telegram/TdDb.h"
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#include "td/telegram/telegram_api.h"
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#include "td/telegram/Version.h"
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#include "td/mtproto/RSA.h"
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#include "td/utils/logging.h"
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#include "td/utils/Time.h"
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namespace td {
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PublicRsaKeyWatchdog::PublicRsaKeyWatchdog(ActorShared<> parent) : parent_(std::move(parent)) {
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}
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void PublicRsaKeyWatchdog::add_public_rsa_key(std::shared_ptr<PublicRsaKeyShared> key) {
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class Listener final : public PublicRsaKeyShared::Listener {
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public:
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explicit Listener(ActorId<PublicRsaKeyWatchdog> parent) : parent_(std::move(parent)) {
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}
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bool notify() final {
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send_event(parent_, Event::yield());
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return parent_.is_alive();
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}
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private:
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ActorId<PublicRsaKeyWatchdog> parent_;
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};
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key->add_listener(make_unique<Listener>(actor_id(this)));
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sync_key(key);
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keys_.push_back(std::move(key));
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loop();
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}
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void PublicRsaKeyWatchdog::start_up() {
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flood_control_.add_limit(1, 1);
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flood_control_.add_limit(2, 60);
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flood_control_.add_limit(3, 2 * 60);
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string version = G()->td_db()->get_binlog_pmc()->get("cdn_config_version");
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current_version_ = to_string(MTPROTO_LAYER);
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if (version != current_version_) {
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G()->td_db()->get_binlog_pmc()->erase("cdn_config" + version);
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} else {
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sync(BufferSlice(G()->td_db()->get_binlog_pmc()->get("cdn_config" + version)));
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}
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CHECK(keys_.empty());
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}
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void PublicRsaKeyWatchdog::loop() {
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if (has_query_) {
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return;
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}
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auto now = Time::now();
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if (now < flood_control_.get_wakeup_at()) {
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set_timeout_at(flood_control_.get_wakeup_at() + 0.01);
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return;
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}
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bool ok = true;
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for (auto &key : keys_) {
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if (!key->has_keys()) {
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ok = false;
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}
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}
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if (ok) {
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return;
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}
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flood_control_.add_event(now);
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has_query_ = true;
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auto query = G()->net_query_creator().create(telegram_api::help_getCdnConfig());
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query->total_timeout_limit_ = 60 * 60 * 24;
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G()->net_query_dispatcher().dispatch_with_callback(std::move(query), actor_shared(this));
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}
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void PublicRsaKeyWatchdog::on_result(NetQueryPtr net_query) {
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has_query_ = false;
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yield();
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if (net_query->is_error()) {
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LOG(ERROR) << "Receive error for GetCdnConfig: " << net_query->move_as_error();
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loop();
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return;
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}
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auto buf = net_query->move_as_ok();
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G()->td_db()->get_binlog_pmc()->set("cdn_config_version", current_version_);
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G()->td_db()->get_binlog_pmc()->set("cdn_config" + current_version_, buf.as_slice().str());
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sync(std::move(buf));
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}
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void PublicRsaKeyWatchdog::sync(BufferSlice cdn_config_serialized) {
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if (cdn_config_serialized.empty()) {
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loop();
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return;
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}
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auto r_keys = fetch_result<telegram_api::help_getCdnConfig>(cdn_config_serialized);
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if (r_keys.is_error()) {
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LOG(WARNING) << "Failed to deserialize help_getCdnConfig (probably not a problem) " << r_keys.error();
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loop();
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return;
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}
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cdn_config_ = r_keys.move_as_ok();
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if (keys_.empty()) {
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LOG(INFO) << "Load " << to_string(cdn_config_);
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} else {
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LOG(INFO) << "Receive " << to_string(cdn_config_);
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for (auto &key : keys_) {
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sync_key(key);
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}
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}
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}
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void PublicRsaKeyWatchdog::sync_key(std::shared_ptr<PublicRsaKeyShared> &key) {
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if (!cdn_config_) {
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return;
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}
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for (auto &config_key : cdn_config_->public_keys_) {
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if (key->dc_id().get_raw_id() == config_key->dc_id_) {
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auto r_rsa = mtproto::RSA::from_pem_public_key(config_key->public_key_);
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if (r_rsa.is_error()) {
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LOG(ERROR) << r_rsa.error();
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continue;
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}
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LOG(INFO) << "Add CDN " << key->dc_id() << " key with fingerprint " << r_rsa.ok().get_fingerprint();
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key->add_rsa(r_rsa.move_as_ok());
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}
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}
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}
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} // namespace td
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