tdesktop/Telegram/SourceFiles/storage/storage_domain.cpp

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/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#include "storage/storage_domain.h"
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#include "storage/details/storage_file_utilities.h"
#include "storage/serialize_common.h"
#include "mtproto/mtproto_config.h"
#include "main/main_domain.h"
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#include "main/main_account.h"
namespace Storage {
namespace {
using namespace details;
[[nodiscard]] QString BaseGlobalPath() {
return cWorkingDir() + qsl("tdata/");
}
[[nodiscard]] QString ComputeKeyName(const QString &dataName) {
// We dropped old test authorizations when migrated to multi auth.
//return "key_" + dataName + (cTestMode() ? "[test]" : "");
return "key_" + dataName;
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}
} // namespace
Domain::Domain(not_null<Main::Domain*> owner, const QString &dataName)
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: _owner(owner)
, _dataName(dataName) {
}
Domain::~Domain() = default;
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StartResult Domain::start(const QByteArray &passcode) {
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const auto modern = startModern(passcode);
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if (modern == StartModernResult::Success) {
if (_oldVersion < AppVersion) {
writeAccounts();
}
return StartResult::Success;
} else if (modern == StartModernResult::IncorrectPasscode) {
return StartResult::IncorrectPasscode;
} else if (modern == StartModernResult::Failed) {
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startFromScratch();
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return StartResult::Success;
}
auto legacy = std::make_unique<Main::Account>(_owner, _dataName, 0);
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const auto result = legacy->legacyStart(passcode);
if (result == StartResult::Success) {
_oldVersion = legacy->local().oldMapVersion();
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startWithSingleAccount(passcode, std::move(legacy));
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}
return result;
}
void Domain::startAdded(
not_null<Main::Account*> account,
std::unique_ptr<MTP::Config> config) {
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Expects(_localKey != nullptr);
account->prepareToStartAdded(_localKey);
account->start(std::move(config));
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}
void Domain::startWithSingleAccount(
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const QByteArray &passcode,
std::unique_ptr<Main::Account> account) {
Expects(account != nullptr);
if (auto localKey = account->local().peekLegacyLocalKey()) {
_localKey = std::move(localKey);
encryptLocalKey(passcode);
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account->start(nullptr);
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} else {
generateLocalKey();
account->start(account->prepareToStart(_localKey));
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}
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_owner->accountAddedInStorage(Main::Domain::AccountWithIndex{
.account = std::move(account)
});
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writeAccounts();
}
void Domain::generateLocalKey() {
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Expects(_localKey == nullptr);
Expects(_passcodeKeySalt.isEmpty());
Expects(_passcodeKeyEncrypted.isEmpty());
auto pass = QByteArray(MTP::AuthKey::kSize, Qt::Uninitialized);
auto salt = QByteArray(LocalEncryptSaltSize, Qt::Uninitialized);
memset_rand(pass.data(), pass.size());
memset_rand(salt.data(), salt.size());
_localKey = CreateLocalKey(pass, salt);
encryptLocalKey(QByteArray());
}
void Domain::encryptLocalKey(const QByteArray &passcode) {
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_passcodeKeySalt.resize(LocalEncryptSaltSize);
memset_rand(_passcodeKeySalt.data(), _passcodeKeySalt.size());
_passcodeKey = CreateLocalKey(passcode, _passcodeKeySalt);
EncryptedDescriptor passKeyData(MTP::AuthKey::kSize);
_localKey->write(passKeyData.stream);
_passcodeKeyEncrypted = PrepareEncrypted(passKeyData, _passcodeKey);
_hasLocalPasscode = !passcode.isEmpty();
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}
Domain::StartModernResult Domain::startModern(
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const QByteArray &passcode) {
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const auto name = ComputeKeyName(_dataName);
FileReadDescriptor keyData;
if (!ReadFile(keyData, name, BaseGlobalPath())) {
return StartModernResult::Empty;
}
LOG(("App Info: reading accounts info..."));
QByteArray salt, keyEncrypted, infoEncrypted;
keyData.stream >> salt >> keyEncrypted >> infoEncrypted;
if (!CheckStreamStatus(keyData.stream)) {
return StartModernResult::Failed;
}
if (salt.size() != LocalEncryptSaltSize) {
LOG(("App Error: bad salt in info file, size: %1").arg(salt.size()));
return StartModernResult::Failed;
}
_passcodeKey = CreateLocalKey(passcode, salt);
EncryptedDescriptor keyInnerData, info;
if (!DecryptLocal(keyInnerData, keyEncrypted, _passcodeKey)) {
LOG(("App Info: could not decrypt pass-protected key from info file, "
"maybe bad password..."));
return StartModernResult::IncorrectPasscode;
}
auto key = Serialize::read<MTP::AuthKey::Data>(keyInnerData.stream);
if (keyInnerData.stream.status() != QDataStream::Ok
|| !keyInnerData.stream.atEnd()) {
LOG(("App Error: could not read pass-protected key from info file"));
return StartModernResult::Failed;
}
_localKey = std::make_shared<MTP::AuthKey>(key);
_passcodeKeyEncrypted = keyEncrypted;
_passcodeKeySalt = salt;
_hasLocalPasscode = !passcode.isEmpty();
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if (!DecryptLocal(info, infoEncrypted, _localKey)) {
LOG(("App Error: could not decrypt info."));
return StartModernResult::Failed;
}
LOG(("App Info: reading encrypted info..."));
auto count = qint32();
info.stream >> count;
if (count <= 0 || count > Main::Domain::kMaxAccounts) {
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LOG(("App Error: bad accounts count: %1").arg(count));
return StartModernResult::Failed;
}
_oldVersion = keyData.version;
auto tried = base::flat_set<int>();
auto sessions = base::flat_set<uint64>();
auto active = 0;
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for (auto i = 0; i != count; ++i) {
auto index = qint32();
info.stream >> index;
if (index >= 0
&& index < Main::Domain::kMaxAccounts
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&& tried.emplace(index).second) {
auto account = std::make_unique<Main::Account>(
_owner,
_dataName,
index);
auto config = account->prepareToStart(_localKey);
const auto sessionId = account->willHaveSessionUniqueId(
config.get());
if (!sessions.contains(sessionId)
&& (sessionId != 0 || (sessions.empty() && i + 1 == count))) {
if (sessions.empty()) {
active = index;
}
account->start(std::move(config));
_owner->accountAddedInStorage({
.index = index,
.account = std::move(account)
});
sessions.emplace(sessionId);
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}
}
}
if (sessions.empty()) {
LOG(("App Error: no accounts read."));
return StartModernResult::Failed;
}
if (!info.stream.atEnd()) {
info.stream >> active;
}
_owner->activateFromStorage(active);
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Ensures(!sessions.empty());
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return StartModernResult::Success;
}
void Domain::writeAccounts() {
Expects(!_owner->accounts().empty());
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const auto path = BaseGlobalPath();
if (!QDir().exists(path)) {
QDir().mkpath(path);
}
FileWriteDescriptor key(ComputeKeyName(_dataName), path);
key.writeData(_passcodeKeySalt);
key.writeData(_passcodeKeyEncrypted);
const auto &list = _owner->accounts();
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auto keySize = sizeof(qint32) + sizeof(qint32) * list.size();
EncryptedDescriptor keyData(keySize);
keyData.stream << qint32(list.size());
for (const auto &[index, account] : list) {
keyData.stream << qint32(index);
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}
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keyData.stream << qint32(_owner->activeForStorage());
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key.writeEncrypted(keyData, _localKey);
}
void Domain::startFromScratch() {
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startWithSingleAccount(
QByteArray(),
std::make_unique<Main::Account>(_owner, _dataName, 0));
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}
bool Domain::checkPasscode(const QByteArray &passcode) const {
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Expects(!_passcodeKeySalt.isEmpty());
Expects(_passcodeKey != nullptr);
const auto checkKey = CreateLocalKey(passcode, _passcodeKeySalt);
return checkKey->equals(_passcodeKey);
}
void Domain::setPasscode(const QByteArray &passcode) {
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Expects(!_passcodeKeySalt.isEmpty());
Expects(_localKey != nullptr);
encryptLocalKey(passcode);
writeAccounts();
_passcodeKeyChanged.fire({});
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}
int Domain::oldVersion() const {
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return _oldVersion;
}
void Domain::clearOldVersion() {
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_oldVersion = 0;
}
QString Domain::webviewDataPath() const {
return BaseGlobalPath() + "webview";
}
rpl::producer<> Domain::localPasscodeChanged() const {
return _passcodeKeyChanged.events();
}
bool Domain::hasLocalPasscode() const {
return _hasLocalPasscode;
}
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} // namespace Storage