tdlight/td/telegram/DeviceTokenManager.cpp

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//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2021
//
// 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)
//
#include "td/telegram/DeviceTokenManager.h"
#include "td/telegram/Global.h"
#include "td/telegram/misc.h"
#include "td/telegram/net/NetQueryDispatcher.h"
#include "td/telegram/td_api.hpp"
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#include "td/telegram/TdDb.h"
#include "td/telegram/telegram_api.h"
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#include "td/telegram/UserId.h"
#include "td/mtproto/DhHandshake.h"
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#include "td/utils/algorithm.h"
#include "td/utils/base64.h"
#include "td/utils/buffer.h"
#include "td/utils/format.h"
#include "td/utils/JsonBuilder.h"
#include "td/utils/logging.h"
#include "td/utils/Random.h"
#include "td/utils/SliceBuilder.h"
#include "td/utils/Status.h"
#include "td/utils/tl_helpers.h"
#include <type_traits>
namespace td {
template <class StorerT>
void DeviceTokenManager::TokenInfo::store(StorerT &storer) const {
using td::store;
bool has_other_user_ids = !other_user_ids.empty();
bool is_sync = state == State::Sync;
bool is_unregister = state == State::Unregister;
bool is_register = state == State::Register;
CHECK(state != State::Reregister);
BEGIN_STORE_FLAGS();
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STORE_FLAG(false);
STORE_FLAG(is_sync);
STORE_FLAG(is_unregister);
STORE_FLAG(is_register);
STORE_FLAG(is_app_sandbox);
STORE_FLAG(encrypt);
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STORE_FLAG(has_other_user_ids);
END_STORE_FLAGS();
store(token, storer);
if (has_other_user_ids) {
store(other_user_ids, storer);
}
if (encrypt) {
store(encryption_key, storer);
store(encryption_key_id, storer);
}
}
template <class ParserT>
void DeviceTokenManager::TokenInfo::parse(ParserT &parser) {
using td::parse;
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bool has_other_user_ids_legacy;
bool has_other_user_ids;
bool is_sync;
bool is_unregister;
bool is_register;
BEGIN_PARSE_FLAGS();
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PARSE_FLAG(has_other_user_ids_legacy);
PARSE_FLAG(is_sync);
PARSE_FLAG(is_unregister);
PARSE_FLAG(is_register);
PARSE_FLAG(is_app_sandbox);
PARSE_FLAG(encrypt);
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PARSE_FLAG(has_other_user_ids);
END_PARSE_FLAGS();
CHECK(is_sync + is_unregister + is_register == 1);
if (is_sync) {
state = State::Sync;
} else if (is_unregister) {
state = State::Unregister;
} else {
state = State::Register;
}
parse(token, parser);
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if (has_other_user_ids_legacy) {
vector<int32> other_user_ids_legacy;
parse(other_user_ids_legacy, parser);
other_user_ids = transform(other_user_ids_legacy, [](int32 user_id) { return static_cast<int64>(user_id); });
}
if (has_other_user_ids) {
parse(other_user_ids, parser);
}
if (encrypt) {
parse(encryption_key, parser);
parse(encryption_key_id, parser);
}
}
StringBuilder &operator<<(StringBuilder &string_builder, const DeviceTokenManager::TokenInfo::State &state) {
switch (state) {
case DeviceTokenManager::TokenInfo::State::Sync:
return string_builder << "Synchronized";
case DeviceTokenManager::TokenInfo::State::Unregister:
return string_builder << "Unregister";
case DeviceTokenManager::TokenInfo::State::Register:
return string_builder << "Register";
case DeviceTokenManager::TokenInfo::State::Reregister:
return string_builder << "Reregister";
default:
UNREACHABLE();
return string_builder;
}
}
StringBuilder &operator<<(StringBuilder &string_builder, const DeviceTokenManager::TokenInfo &token_info) {
string_builder << token_info.state << " token \"" << format::escaped(token_info.token) << "\"";
if (!token_info.other_user_ids.empty()) {
string_builder << ", with other users " << token_info.other_user_ids;
}
if (token_info.is_app_sandbox) {
string_builder << ", sandboxed";
}
if (token_info.encrypt) {
string_builder << ", encrypted with ID " << token_info.encryption_key_id;
}
return string_builder;
}
void DeviceTokenManager::register_device(tl_object_ptr<td_api::DeviceToken> device_token_ptr,
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const vector<UserId> &other_user_ids,
Promise<td_api::object_ptr<td_api::pushReceiverId>> promise) {
CHECK(device_token_ptr != nullptr);
TokenType token_type;
string token;
bool is_app_sandbox = false;
bool encrypt = false;
switch (device_token_ptr->get_id()) {
case td_api::deviceTokenApplePush::ID: {
auto device_token = static_cast<td_api::deviceTokenApplePush *>(device_token_ptr.get());
token = std::move(device_token->device_token_);
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token_type = TokenType::Apns;
is_app_sandbox = device_token->is_app_sandbox_;
break;
}
case td_api::deviceTokenFirebaseCloudMessaging::ID: {
auto device_token = static_cast<td_api::deviceTokenFirebaseCloudMessaging *>(device_token_ptr.get());
token = std::move(device_token->token_);
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token_type = TokenType::Fcm;
encrypt = device_token->encrypt_;
break;
}
case td_api::deviceTokenMicrosoftPush::ID: {
auto device_token = static_cast<td_api::deviceTokenMicrosoftPush *>(device_token_ptr.get());
token = std::move(device_token->channel_uri_);
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token_type = TokenType::Mpns;
break;
}
case td_api::deviceTokenSimplePush::ID: {
auto device_token = static_cast<td_api::deviceTokenSimplePush *>(device_token_ptr.get());
token = std::move(device_token->endpoint_);
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token_type = TokenType::SimplePush;
break;
}
case td_api::deviceTokenUbuntuPush::ID: {
auto device_token = static_cast<td_api::deviceTokenUbuntuPush *>(device_token_ptr.get());
token = std::move(device_token->token_);
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token_type = TokenType::UbuntuPhone;
break;
}
case td_api::deviceTokenBlackBerryPush::ID: {
auto device_token = static_cast<td_api::deviceTokenBlackBerryPush *>(device_token_ptr.get());
token = std::move(device_token->token_);
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token_type = TokenType::BlackBerry;
break;
}
case td_api::deviceTokenWindowsPush::ID: {
auto device_token = static_cast<td_api::deviceTokenWindowsPush *>(device_token_ptr.get());
token = std::move(device_token->access_token_);
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token_type = TokenType::Wns;
break;
}
case td_api::deviceTokenApplePushVoIP::ID: {
auto device_token = static_cast<td_api::deviceTokenApplePushVoIP *>(device_token_ptr.get());
token = std::move(device_token->device_token_);
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token_type = TokenType::ApnsVoip;
is_app_sandbox = device_token->is_app_sandbox_;
encrypt = device_token->encrypt_;
break;
}
case td_api::deviceTokenWebPush::ID: {
auto device_token = static_cast<td_api::deviceTokenWebPush *>(device_token_ptr.get());
if (device_token->endpoint_.find(',') != string::npos) {
return promise.set_error(Status::Error(400, "Illegal endpoint value"));
}
if (!is_base64url(device_token->p256dh_base64url_)) {
return promise.set_error(Status::Error(400, "Public key must be base64url-encoded"));
}
if (!is_base64url(device_token->auth_base64url_)) {
return promise.set_error(Status::Error(400, "Authentication secret must be base64url-encoded"));
}
if (!clean_input_string(device_token->endpoint_)) {
return promise.set_error(Status::Error(400, "Endpoint must be encoded in UTF-8"));
}
if (!device_token->endpoint_.empty()) {
token = json_encode<string>(json_object([&device_token](auto &o) {
o("endpoint", device_token->endpoint_);
o("keys", json_object([&device_token](auto &o) {
o("p256dh", device_token->p256dh_base64url_);
o("auth", device_token->auth_base64url_);
}));
}));
}
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token_type = TokenType::WebPush;
break;
}
case td_api::deviceTokenMicrosoftPushVoIP::ID: {
auto device_token = static_cast<td_api::deviceTokenMicrosoftPushVoIP *>(device_token_ptr.get());
token = std::move(device_token->channel_uri_);
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token_type = TokenType::MpnsVoip;
break;
}
case td_api::deviceTokenTizenPush::ID: {
auto device_token = static_cast<td_api::deviceTokenTizenPush *>(device_token_ptr.get());
token = std::move(device_token->reg_id_);
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token_type = TokenType::Tizen;
break;
}
default:
UNREACHABLE();
}
if (!clean_input_string(token)) {
return promise.set_error(Status::Error(400, "Device token must be encoded in UTF-8"));
}
for (auto &other_user_id : other_user_ids) {
if (!other_user_id.is_valid()) {
return promise.set_error(Status::Error(400, "Invalid user_id among other user_ids"));
}
}
auto input_user_ids = UserId::get_input_user_ids(other_user_ids);
auto &info = tokens_[token_type];
if (token.empty()) {
if (info.token.empty()) {
// already unregistered
return promise.set_value(td_api::make_object<td_api::pushReceiverId>());
}
info.state = TokenInfo::State::Unregister;
} else {
if ((info.state == TokenInfo::State::Reregister || info.state == TokenInfo::State::Sync) && info.token == token &&
info.other_user_ids == input_user_ids && info.is_app_sandbox == is_app_sandbox && encrypt == info.encrypt) {
int64 push_token_id = encrypt ? info.encryption_key_id : G()->get_my_id();
return promise.set_value(td_api::make_object<td_api::pushReceiverId>(push_token_id));
}
info.state = TokenInfo::State::Register;
info.token = std::move(token);
}
info.net_query_id = 0;
info.other_user_ids = std::move(input_user_ids);
info.is_app_sandbox = is_app_sandbox;
if (encrypt != info.encrypt) {
if (encrypt) {
constexpr size_t ENCRYPTION_KEY_LENGTH = 256;
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constexpr auto MIN_ENCRYPTION_KEY_ID = static_cast<int64>(10000000000000ll);
info.encryption_key.resize(ENCRYPTION_KEY_LENGTH);
while (true) {
Random::secure_bytes(info.encryption_key);
info.encryption_key_id = mtproto::DhHandshake::calc_key_id(info.encryption_key);
if (info.encryption_key_id <= -MIN_ENCRYPTION_KEY_ID || info.encryption_key_id >= MIN_ENCRYPTION_KEY_ID) {
// ensure that encryption key ID never collide with anything
break;
}
}
} else {
info.encryption_key.clear();
info.encryption_key_id = 0;
}
info.encrypt = encrypt;
}
info.promise.set_value(td_api::make_object<td_api::pushReceiverId>());
info.promise = std::move(promise);
save_info(token_type);
}
void DeviceTokenManager::reregister_device() {
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for (int32 token_type = 1; token_type < TokenType::Size; token_type++) {
auto &token = tokens_[token_type];
if (token.state == TokenInfo::State::Sync && !token.token.empty()) {
token.state = TokenInfo::State::Reregister;
}
}
loop();
}
vector<std::pair<int64, Slice>> DeviceTokenManager::get_encryption_keys() const {
vector<std::pair<int64, Slice>> result;
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for (int32 token_type = 1; token_type < TokenType::Size; token_type++) {
auto &info = tokens_[token_type];
if (!info.token.empty() && info.state != TokenInfo::State::Unregister) {
if (info.encrypt) {
result.emplace_back(info.encryption_key_id, info.encryption_key);
} else {
result.emplace_back(G()->get_my_id(), Slice());
}
}
}
return result;
}
string DeviceTokenManager::get_database_key(int32 token_type) {
return PSTRING() << "device_token" << token_type;
}
void DeviceTokenManager::start_up() {
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for (int32 token_type = 1; token_type < TokenType::Size; token_type++) {
auto serialized = G()->td_db()->get_binlog_pmc()->get(get_database_key(token_type));
if (serialized.empty()) {
continue;
}
auto &token = tokens_[token_type];
char c = serialized[0];
if (c == '*') {
auto status = unserialize(token, serialized.substr(1));
if (status.is_error()) {
token = TokenInfo();
LOG(ERROR) << "Invalid serialized TokenInfo: " << format::escaped(serialized) << ' ' << status;
continue;
}
} else {
// legacy
if (c == '+') {
token.state = TokenInfo::State::Register;
} else if (c == '-') {
token.state = TokenInfo::State::Unregister;
} else if (c == '=') {
token.state = TokenInfo::State::Sync;
} else {
LOG(ERROR) << "Invalid serialized TokenInfo: " << format::escaped(serialized);
continue;
}
token.token = serialized.substr(1);
}
LOG(INFO) << "Have device token " << token_type << "--->" << token;
if (token.state == TokenInfo::State::Sync && !token.token.empty()) {
token.state = TokenInfo::State::Reregister;
}
}
loop();
}
void DeviceTokenManager::save_info(int32 token_type) {
LOG(INFO) << "SET device token " << token_type << "--->" << tokens_[token_type];
if (tokens_[token_type].token.empty()) {
G()->td_db()->get_binlog_pmc()->erase(get_database_key(token_type));
} else {
G()->td_db()->get_binlog_pmc()->set(get_database_key(token_type), "*" + serialize(tokens_[token_type]));
}
sync_cnt_++;
G()->td_db()->get_binlog_pmc()->force_sync(
PromiseCreator::event(self_closure(this, &DeviceTokenManager::dec_sync_cnt)));
}
void DeviceTokenManager::dec_sync_cnt() {
sync_cnt_--;
loop();
}
void DeviceTokenManager::loop() {
if (sync_cnt_ != 0 || G()->close_flag()) {
return;
}
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for (int32 token_type = 1; token_type < TokenType::Size; token_type++) {
auto &info = tokens_[token_type];
if (info.state == TokenInfo::State::Sync) {
continue;
}
if (info.net_query_id != 0) {
continue;
}
// have to send query
NetQueryPtr net_query;
if (info.state == TokenInfo::State::Unregister) {
net_query = G()->net_query_creator().create(
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telegram_api::account_unregisterDevice(token_type, info.token, vector<int64>(info.other_user_ids)));
} else {
int32 flags = telegram_api::account_registerDevice::NO_MUTED_MASK;
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net_query = G()->net_query_creator().create(
telegram_api::account_registerDevice(flags, false /*ignored*/, token_type, info.token, info.is_app_sandbox,
BufferSlice(info.encryption_key), vector<int64>(info.other_user_ids)));
}
info.net_query_id = net_query->id();
G()->net_query_dispatcher().dispatch_with_callback(std::move(net_query), actor_shared(this, token_type));
}
}
void DeviceTokenManager::on_result(NetQueryPtr net_query) {
auto token_type = static_cast<TokenType>(get_link_token());
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CHECK(token_type >= 1 && token_type < TokenType::Size);
auto &info = tokens_[token_type];
if (info.net_query_id != net_query->id()) {
net_query->clear();
return;
}
info.net_query_id = 0;
CHECK(info.state != TokenInfo::State::Sync);
static_assert(std::is_same<telegram_api::account_registerDevice::ReturnType,
telegram_api::account_unregisterDevice::ReturnType>::value,
"");
auto r_flag = fetch_result<telegram_api::account_registerDevice>(std::move(net_query));
if (r_flag.is_ok() && r_flag.ok()) {
if (info.promise) {
int64 push_token_id = 0;
if (info.state == TokenInfo::State::Register) {
if (info.encrypt) {
push_token_id = info.encryption_key_id;
} else {
push_token_id = G()->get_my_id();
}
}
info.promise.set_value(td_api::make_object<td_api::pushReceiverId>(push_token_id));
}
if (info.state == TokenInfo::State::Unregister) {
info.token.clear();
}
info.state = TokenInfo::State::Sync;
} else {
if (r_flag.is_error()) {
if (!G()->is_expected_error(r_flag.error())) {
LOG(ERROR) << "Failed to " << info.state << " device: " << r_flag.error();
}
info.promise.set_error(r_flag.move_as_error());
} else {
info.promise.set_error(Status::Error(400, "Got false as result of registerDevice server request"));
}
if (info.state == TokenInfo::State::Reregister) {
// keep trying to reregister the token
return loop();
} else if (info.state == TokenInfo::State::Register) {
info.state = TokenInfo::State::Unregister;
} else {
CHECK(info.state == TokenInfo::State::Unregister);
info.state = TokenInfo::State::Sync;
info.token.clear();
}
}
save_info(token_type);
}
} // namespace td