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Move away from using an event loop to access secrets

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Fixes messages in room flickering and being stuck

fixes #760
relates to #770
relates to #789
This commit is contained in:
Nicolas Werner 2021-11-07 03:38:48 +01:00
parent d112d6b11f
commit 5ca1fb18bb
No known key found for this signature in database
GPG key ID: C8D75E610773F2D9
11 changed files with 267 additions and 208 deletions
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4
resources/qml/MessageView.qml
View file

@ -363,7 +363,7 @@ ScrollView {
anchors.horizontalCenter: parent ? parent.horizontalCenter : undefined
width: chat.delegateMaxWidth
height: Math.max(section.active ? section.height + timelinerow.height : timelinerow.height, 10)
height: section.active ? section.height + timelinerow.height : timelinerow.height
Rectangle {
id: scrollHighlight
@ -420,7 +420,7 @@ ScrollView {
property string day: wrapper.day
property string previousMessageDay: wrapper.previousMessageDay
property string userName: wrapper.userName
property var timestamp: wrapper.timestamp
property date timestamp: wrapper.timestamp
z: 4
active: previousMessageUserId !== undefined && previousMessageUserId !== userId || previousMessageDay !== day

2
resources/qml/delegates/MessageDelegate.qml
View file

@ -34,7 +34,7 @@ Item {
required property int encryptionError
required property int relatedEventCacheBuster
height: Math.max(chooser.child.height, 20)
height: chooser.child ? chooser.child.height : Nheko.paddingLarge
DelegateChooser {
id: chooser

2
resources/qml/dialogs/LogoutDialog.qml
View file

@ -14,6 +14,6 @@ MessageDialog {
text: CallManager.isOnCall ? qsTr("A call is in progress. Log out?") : qsTr("Are you sure you want to log out?")
modality: Qt.WindowModal
flags: Qt.Tool | Qt.WindowStaysOnTopHint | Qt.WindowCloseButtonHint | Qt.WindowTitleHint
buttons: Dialog.Ok | Dialog.Cancel
buttons: MessageDialog.Ok | MessageDialog.Cancel
onAccepted: Nheko.logout()
}

2
resources/qml/dialogs/RoomSettings.qml
View file

@ -239,7 +239,7 @@ ApplicationWindow {
onRejected: {
encryptionToggle.checked = false;
}
buttons: Dialog.Ok | Dialog.Cancel
buttons: Platform.MessageDialog.Ok | Platform.MessageDialog.Cancel
}
MatrixText {

313
src/Cache.cpp
View file

@ -199,7 +199,6 @@ Cache::Cache(const QString &userId, QObject *parent)
, env_{nullptr}
, localUserId_{userId}
{
setup();
connect(this, &Cache::userKeysUpdate, this, &Cache::updateUserKeys, Qt::QueuedConnection);
connect(
this,
@ -212,6 +211,7 @@ Cache::Cache(const QString &userId, QObject *parent)
}
},
Qt::QueuedConnection);
setup();
}
void
@ -308,7 +308,178 @@ Cache::setup()
txn.commit();
databaseReady_ = true;
loadSecrets({
{mtx::secret_storage::secrets::cross_signing_master, false},
{mtx::secret_storage::secrets::cross_signing_self_signing, false},
{mtx::secret_storage::secrets::cross_signing_user_signing, false},
{mtx::secret_storage::secrets::megolm_backup_v1, false},
{"pickle_secret", true},
});
}
static void
fatalSecretError()
{
QMessageBox::critical(
ChatPage::instance(),
QCoreApplication::translate("SecretStorage", "Failed to connect to secret storage"),
QCoreApplication::translate(
"SecretStorage",
"Nheko could not connect to the secure storage to save encryption secrets to. This can "
"have multiple reasons. Check if your D-Bus service is running and you have configured a "
"service like KWallet, Gnome Keyring, KeePassXC or the equivalent for your platform. If "
"you are having trouble, feel free to open an issue here: "
"https://github.com/Nheko-Reborn/nheko/issues"));
QCoreApplication::exit(1);
exit(1);
}
static QString
secretName(std::string name, bool internal)
{
auto settings = UserSettings::instance();
return (internal ? "nheko." : "matrix.") +
QString(
QCryptographicHash::hash(settings->profile().toUtf8(), QCryptographicHash::Sha256)
.toBase64()) +
"." + QString::fromStdString(name);
}
void
Cache::loadSecrets(std::vector<std::pair<std::string, bool>> toLoad)
{
if (toLoad.empty()) {
this->databaseReady_ = true;
emit databaseReady();
return;
}
auto [name_, internal] = toLoad.front();
auto job = new QKeychain::ReadPasswordJob(QCoreApplication::applicationName());
job->setAutoDelete(true);
job->setInsecureFallback(true);
job->setSettings(UserSettings::instance()->qsettings());
auto name = secretName(name_, internal);
job->setKey(name);
connect(job,
&QKeychain::ReadPasswordJob::finished,
this,
[this, name, toLoad, job](QKeychain::Job *) mutable {
const QString secret = job->textData();
if (job->error() && job->error() != QKeychain::Error::EntryNotFound) {
nhlog::db()->error("Restoring secret '{}' failed ({}): {}",
name.toStdString(),
job->error(),
job->errorString().toStdString());
fatalSecretError();
}
if (secret.isEmpty()) {
nhlog::db()->debug("Restored empty secret '{}'.", name.toStdString());
} else {
std::unique_lock lock(secret_storage.mtx);
secret_storage.secrets[name.toStdString()] = secret.toStdString();
}
// load next secret
toLoad.erase(toLoad.begin());
// You can't start a job from the finish signal of a job.
QTimer::singleShot(0, [this, toLoad] { loadSecrets(toLoad); });
});
job->start();
}
std::optional<std::string>
Cache::secret(const std::string name_, bool internal)
{
auto name = secretName(name_, internal);
std::unique_lock lock(secret_storage.mtx);
if (auto secret = secret_storage.secrets.find(name.toStdString());
secret != secret_storage.secrets.end())
return secret->second;
else
return std::nullopt;
}
void
Cache::storeSecret(const std::string name_, const std::string secret, bool internal)
{
auto name = secretName(name_, internal);
{
std::unique_lock lock(secret_storage.mtx);
secret_storage.secrets[name.toStdString()] = secret;
}
auto settings = UserSettings::instance();
auto job = new QKeychain::WritePasswordJob(QCoreApplication::applicationName());
job->setAutoDelete(true);
job->setInsecureFallback(true);
job->setSettings(UserSettings::instance()->qsettings());
job->setKey(name);
job->setTextData(QString::fromStdString(secret));
QObject::connect(
job,
&QKeychain::WritePasswordJob::finished,
this,
[name_, this](QKeychain::Job *job) {
if (job->error()) {
nhlog::db()->warn(
"Storing secret '{}' failed: {}", name_, job->errorString().toStdString());
fatalSecretError();
} else {
// if we emit the signal directly, qtkeychain breaks and won't execute new
// jobs. You can't start a job from the finish signal of a job.
QTimer::singleShot(0, [this, name_] { emit secretChanged(name_); });
nhlog::db()->info("Storing secret '{}' successful", name_);
}
},
Qt::ConnectionType::DirectConnection);
job->start();
}
void
Cache::deleteSecret(const std::string name, bool internal)
{
auto name_ = secretName(name, internal);
{
std::unique_lock lock(secret_storage.mtx);
secret_storage.secrets.erase(name_.toStdString());
}
auto settings = UserSettings::instance();
auto job = new QKeychain::DeletePasswordJob(QCoreApplication::applicationName());
job->setAutoDelete(true);
job->setInsecureFallback(true);
job->setSettings(UserSettings::instance()->qsettings());
job->setKey(name_);
job->connect(
job, &QKeychain::Job::finished, this, [this, name]() { emit secretChanged(name); });
job->start();
}
std::string
Cache::pickleSecret()
{
if (pickle_secret_.empty()) {
auto s = secret("pickle_secret", true);
if (!s) {
this->pickle_secret_ = mtx::client::utils::random_token(64, true);
storeSecret("pickle_secret", pickle_secret_, true);
} else {
this->pickle_secret_ = *s;
}
}
return pickle_secret_;
}
void
@ -758,144 +929,6 @@ Cache::backupVersion()
}
}
static void
fatalSecretError()
{
QMessageBox::critical(
ChatPage::instance(),
QCoreApplication::translate("SecretStorage", "Failed to connect to secret storage"),
QCoreApplication::translate(
"SecretStorage",
"Nheko could not connect to the secure storage to save encryption secrets to. This can "
"have multiple reasons. Check if your D-Bus service is running and you have configured a "
"service like KWallet, Gnome Keyring, KeePassXC or the equivalent for your platform. If "
"you are having trouble, feel free to open an issue here: "
"https://github.com/Nheko-Reborn/nheko/issues"));
QCoreApplication::exit(1);
exit(1);
}
void
Cache::storeSecret(const std::string name, const std::string secret, bool internal)
{
auto settings = UserSettings::instance();
auto job = new QKeychain::WritePasswordJob(QCoreApplication::applicationName());
job->setAutoDelete(true);
job->setInsecureFallback(true);
job->setSettings(UserSettings::instance()->qsettings());
job->setKey(
(internal ? "nheko." : "matrix.") +
QString(QCryptographicHash::hash(settings->profile().toUtf8(), QCryptographicHash::Sha256)
.toBase64()) +
"." + QString::fromStdString(name));
job->setTextData(QString::fromStdString(secret));
QObject::connect(
job,
&QKeychain::WritePasswordJob::finished,
this,
[name, this](QKeychain::Job *job) {
if (job->error()) {
nhlog::db()->warn(
"Storing secret '{}' failed: {}", name, job->errorString().toStdString());
fatalSecretError();
} else {
// if we emit the signal directly, qtkeychain breaks and won't execute new
// jobs. You can't start a job from the finish signal of a job.
QTimer::singleShot(100, [this, name] { emit secretChanged(name); });
nhlog::db()->info("Storing secret '{}' successful", name);
}
},
Qt::ConnectionType::DirectConnection);
job->start();
}
void
Cache::deleteSecret(const std::string name, bool internal)
{
auto settings = UserSettings::instance();
QKeychain::DeletePasswordJob job(QCoreApplication::applicationName());
job.setAutoDelete(false);
job.setInsecureFallback(true);
job.setSettings(UserSettings::instance()->qsettings());
job.setKey(
(internal ? "nheko." : "matrix.") +
QString(QCryptographicHash::hash(settings->profile().toUtf8(), QCryptographicHash::Sha256)
.toBase64()) +
"." + QString::fromStdString(name));
// FIXME(Nico): Nested event loops are dangerous. Some other slots may resume in the mean
// time!
QEventLoop loop;
job.connect(&job, &QKeychain::Job::finished, &loop, &QEventLoop::quit);
job.start();
loop.exec();
emit secretChanged(name);
}
std::optional<std::string>
Cache::secret(const std::string name, bool internal)
{
auto settings = UserSettings::instance();
QKeychain::ReadPasswordJob job(QCoreApplication::applicationName());
job.setAutoDelete(false);
job.setInsecureFallback(true);
job.setSettings(UserSettings::instance()->qsettings());
job.setKey(
(internal ? "nheko." : "matrix.") +
QString(QCryptographicHash::hash(settings->profile().toUtf8(), QCryptographicHash::Sha256)
.toBase64()) +
"." + QString::fromStdString(name));
// FIXME(Nico): Nested event loops are dangerous. Some other slots may resume in the mean
// time!
QEventLoop loop;
job.connect(&job, &QKeychain::Job::finished, &loop, &QEventLoop::quit);
job.start();
loop.exec();
const QString secret = job.textData();
if (job.error()) {
if (job.error() == QKeychain::Error::EntryNotFound)
return std::nullopt;
nhlog::db()->error("Restoring secret '{}' failed ({}): {}",
name,
job.error(),
job.errorString().toStdString());
fatalSecretError();
return std::nullopt;
}
if (secret.isEmpty()) {
nhlog::db()->debug("Restored empty secret '{}'.", name);
return std::nullopt;
}
return secret.toStdString();
}
std::string
Cache::pickleSecret()
{
if (pickle_secret_.empty()) {
auto s = secret("pickle_secret", true);
if (!s) {
this->pickle_secret_ = mtx::client::utils::random_token(64, true);
storeSecret("pickle_secret", pickle_secret_, true);
} else {
this->pickle_secret_ = *s;
}
}
return pickle_secret_;
}
void
Cache::removeInvite(lmdb::txn &txn, const std::string &room_id)
{

8
src/CacheCryptoStructs.h
View file

@ -141,6 +141,14 @@ struct VerificationStorage
std::mutex verification_storage_mtx;
};
//! In memory cache of verification status
struct SecretsStorage
{
//! secret name -> secret
std::map<std::string, std::string> secrets;
std::mutex mtx;
};
// this will store the keys of the user with whom a encrypted room is shared with
struct UserKeyCache
{

5
src/Cache_p.h
View file

@ -304,6 +304,7 @@ public:
return get_skey(a).compare(get_skey(b));
}
signals:
void newReadReceipts(const QString &room_id, const std::vector<QString> &event_ids);
void roomReadStatus(const std::map<QString, bool> &status);
@ -312,8 +313,11 @@ signals:
void verificationStatusChanged(const std::string &userid);
void selfVerificationStatusChanged();
void secretChanged(const std::string name);
void databaseReady();
private:
void loadSecrets(std::vector<std::pair<std::string, bool>> toLoad);
//! Save an invited room.
void saveInvite(lmdb::txn &txn,
lmdb::dbi &statesdb,
@ -684,6 +688,7 @@ private:
std::string pickle_secret_;
VerificationStorage verification_storage;
SecretsStorage secret_storage;
bool databaseReady_ = false;
};

117
src/ChatPage.cpp
View file

@ -316,6 +316,65 @@ ChatPage::bootstrap(QString userid, QString homeserver, QString token)
try {
cache::init(userid);
connect(cache::client(), &Cache::databaseReady, this, [this]() {
nhlog::db()->info("database ready");
const bool isInitialized = cache::isInitialized();
const auto cacheVersion = cache::formatVersion();
try {
if (!isInitialized) {
cache::setCurrentFormat();
} else {
if (cacheVersion == cache::CacheVersion::Current) {
loadStateFromCache();
return;
} else if (cacheVersion == cache::CacheVersion::Older) {
if (!cache::runMigrations()) {
QMessageBox::critical(
this,
tr("Cache migration failed!"),
tr("Migrating the cache to the current version failed. "
"This can have different reasons. Please open an "
"issue and try to use an older version in the mean "
"time. Alternatively you can try deleting the cache "
"manually."));
QCoreApplication::quit();
}
loadStateFromCache();
return;
} else if (cacheVersion == cache::CacheVersion::Newer) {
QMessageBox::critical(
this,
tr("Incompatible cache version"),
tr("The cache on your disk is newer than this version of Nheko "
"supports. Please update Nheko or clear your cache."));
QCoreApplication::quit();
return;
}
}
// It's the first time syncing with this device
// There isn't a saved olm account to restore.
nhlog::crypto()->info("creating new olm account");
olm::client()->create_new_account();
cache::saveOlmAccount(olm::client()->save(cache::client()->pickleSecret()));
} catch (const lmdb::error &e) {
nhlog::crypto()->critical("failed to save olm account {}", e.what());
emit dropToLoginPageCb(QString::fromStdString(e.what()));
return;
} catch (const mtx::crypto::olm_exception &e) {
nhlog::crypto()->critical("failed to create new olm account {}", e.what());
emit dropToLoginPageCb(QString::fromStdString(e.what()));
return;
}
getProfileInfo();
getBackupVersion();
tryInitialSync();
callManager_->refreshTurnServer();
});
connect(cache::client(),
&Cache::newReadReceipts,
view_manager_,
@ -326,66 +385,10 @@ ChatPage::bootstrap(QString userid, QString homeserver, QString token)
&notificationsManager,
&NotificationsManager::removeNotification);
const bool isInitialized = cache::isInitialized();
const auto cacheVersion = cache::formatVersion();
callManager_->refreshTurnServer();
if (!isInitialized) {
cache::setCurrentFormat();
} else {
if (cacheVersion == cache::CacheVersion::Current) {
loadStateFromCache();
return;
} else if (cacheVersion == cache::CacheVersion::Older) {
if (!cache::runMigrations()) {
QMessageBox::critical(this,
tr("Cache migration failed!"),
tr("Migrating the cache to the current version failed. "
"This can have different reasons. Please open an "
"issue and try to use an older version in the mean "
"time. Alternatively you can try deleting the cache "
"manually."));
QCoreApplication::quit();
}
loadStateFromCache();
return;
} else if (cacheVersion == cache::CacheVersion::Newer) {
QMessageBox::critical(
this,
tr("Incompatible cache version"),
tr("The cache on your disk is newer than this version of Nheko "
"supports. Please update or clear your cache."));
QCoreApplication::quit();
return;
}
}
} catch (const lmdb::error &e) {
nhlog::db()->critical("failure during boot: {}", e.what());
cache::deleteData();
nhlog::net()->info("falling back to initial sync");
emit dropToLoginPageCb(tr("Failed to open database, logging out!"));
}
try {
// It's the first time syncing with this device
// There isn't a saved olm account to restore.
nhlog::crypto()->info("creating new olm account");
olm::client()->create_new_account();
cache::saveOlmAccount(olm::client()->save(cache::client()->pickleSecret()));
} catch (const lmdb::error &e) {
nhlog::crypto()->critical("failed to save olm account {}", e.what());
emit dropToLoginPageCb(QString::fromStdString(e.what()));
return;
} catch (const mtx::crypto::olm_exception &e) {
nhlog::crypto()->critical("failed to create new olm account {}", e.what());
emit dropToLoginPageCb(QString::fromStdString(e.what()));
return;
}
getProfileInfo();
getBackupVersion();
tryInitialSync();
}
void

2
src/UserSettingsPage.cpp
View file

@ -1098,7 +1098,7 @@ UserSettingsPage::UserSettingsPage(QSharedPointer<UserSettings> settings, QWidge
backupSecretCached,
tr("The key to decrypt online key backups. If it is cached, you can enable online "
"key backup to store encryption keys securely encrypted on the server."));
updateSecretStatus();
// updateSecretStatus();
auto scrollArea_ = new QScrollArea{this};
scrollArea_->setFrameShape(QFrame::NoFrame);

13
src/encryption/SelfVerificationStatus.cpp
View file

@ -259,15 +259,20 @@ SelfVerificationStatus::invalidate()
using namespace mtx::secret_storage;
nhlog::db()->info("Invalidating self verification status");
if (cache::isInitialized()) {
return;
}
this->hasSSSS_ = false;
emit hasSSSSChanged();
auto keys = cache::client()->userKeys(http::client()->user_id().to_string());
if (!keys || keys->device_keys.find(http::client()->device_id()) == keys->device_keys.end()) {
cache::client()->markUserKeysOutOfDate({http::client()->user_id().to_string()});
cache::client()->query_keys(http::client()->user_id().to_string(),
[](const UserKeyCache &, mtx::http::RequestErr) {});
return;
QTimer::singleShot(500, [] {
cache::client()->markUserKeysOutOfDate({http::client()->user_id().to_string()});
cache::client()->query_keys(http::client()->user_id().to_string(),
[](const UserKeyCache &, mtx::http::RequestErr) {});
});
}
if (keys->master_keys.keys.empty()) {

7
src/timeline/TimelineViewManager.cpp
View file

@ -248,7 +248,12 @@ TimelineViewManager::TimelineViewManager(CallManager *callManager, ChatPage *par
qmlRegisterSingletonInstance("im.nheko", 1, 0, "VerificationManager", verificationManager_);
qmlRegisterSingletonType<SelfVerificationStatus>(
"im.nheko", 1, 0, "SelfVerificationStatus", [](QQmlEngine *, QJSEngine *) -> QObject * {
return new SelfVerificationStatus();
auto ptr = new SelfVerificationStatus();
QObject::connect(ChatPage::instance(),
&ChatPage::initializeEmptyViews,
ptr,
&SelfVerificationStatus::invalidate);
return ptr;
});
qRegisterMetaType<mtx::events::collections::TimelineEvents>();