From 9dba973e316611d3f612b492db16b52c18514916 Mon Sep 17 00:00:00 2001
From: Raul Metsma <raul@metsma.ee>
Date: Mon, 13 Feb 2023 08:31:57 +0200
Subject: [PATCH] Create Settings class (#1152)

IB-7607

Signed-off-by: Raul Metsma <raul@metsma.ee>
---
 client/Application.cpp               | 158 ++++++++++++++-------------
 client/Application.h                 |   2 +
 client/CMakeLists.txt                | 101 ++++++++---------
 client/CryptoDoc.cpp                 |   1 -
 client/Diagnostics.cpp               |  26 ++---
 client/DocumentModel.cpp             |  21 +---
 client/DocumentModel.h               |   2 +-
 client/MainWindow.cpp                |  24 ++--
 client/Settings.cpp                  |  91 +++++++++++++++
 client/Settings.h                    | 131 ++++++++++++++++++++++
 client/dialogs/AddRecipients.cpp     |  11 +-
 client/dialogs/FileDialog.cpp        |  25 +++--
 client/dialogs/FileDialog.h          |   3 +-
 client/dialogs/MobileDialog.cpp      |  21 ++--
 client/dialogs/MobileProgress.cpp    |  36 +++---
 client/dialogs/RoleAddressDialog.cpp |  25 ++---
 client/dialogs/SettingsDialog.cpp    |  98 +++++++----------
 client/dialogs/SettingsDialog.h      |   1 -
 client/dialogs/SmartIDDialog.cpp     |  24 ++--
 client/dialogs/SmartIDProgress.cpp   |  41 +++----
 client/sslConnect.cpp                |  13 +--
 client/translations/en.ts            |  26 ++---
 client/translations/et.ts            |  24 ++--
 client/translations/ru.ts            |  24 ++--
 client/widgets/ContainerPage.cpp     |  29 ++---
 client/widgets/MainAction.cpp        |  19 ++--
 client/widgets/MainAction.h          |   3 +-
 27 files changed, 565 insertions(+), 415 deletions(-)
 create mode 100644 client/Settings.cpp
 create mode 100644 client/Settings.h

diff --git a/client/Application.cpp b/client/Application.cpp
index 0a8adec45..5e898c2dc 100644
--- a/client/Application.cpp
+++ b/client/Application.cpp
@@ -25,6 +25,7 @@
 #include "QSigner.h"
 #include "QSmartCard.h"
 #include "DigiDoc.h"
+#include "Settings.h"
 #include "Styles.h"
 #ifdef Q_OS_MAC
 #include "MacMenuBar.h"
@@ -52,7 +53,6 @@ class MacMenuBar {};
 #include <QtCore/QJsonObject>
 #include <QtCore/QProcess>
 #include <QtCore/QRegularExpression>
-#include <QtCore/QSettings>
 #include <QtCore/QStandardPaths>
 #include <QtCore/QTimer>
 #include <QtCore/QTranslator>
@@ -90,8 +90,7 @@ class DigidocConf final: public digidoc::XmlConfCurrent
 public:
 	DigidocConf()
 	{
-		debug = s.value(QStringLiteral("LibdigidocppDebug"), false).toBool();
-		s.remove(QStringLiteral("LibdigidocppDebug"));
+		Settings::LIBDIGIDOCPP_DEBUG = false;
 
 #ifdef CONFIG_URL
 		reload();
@@ -121,73 +120,74 @@ class DigidocConf final: public digidoc::XmlConfCurrent
 	std::string proxyHost() const final
 	{
 		return proxyConf(&QNetworkProxy::hostName,
-			QStringLiteral("ProxyHost"), [this] { return digidoc::XmlConfCurrent::proxyHost(); });
+			Settings::PROXY_HOST, [this] { return digidoc::XmlConfCurrent::proxyHost(); });
 	}
 
 	std::string proxyPort() const final
 	{
 		return proxyConf([](const QNetworkProxy &systemProxy) { return QString::number(systemProxy.port()); },
-			QStringLiteral("ProxyPort"), [this] { return digidoc::XmlConfCurrent::proxyPort(); });
+			Settings::PROXY_PORT, [this] { return digidoc::XmlConfCurrent::proxyPort(); });
 	}
 
 	std::string proxyUser() const final
 	{
 		return proxyConf(&QNetworkProxy::user,
-			QStringLiteral("ProxyUser"), [this] { return digidoc::XmlConfCurrent::proxyUser(); });
+			Settings::PROXY_USER, [this] { return digidoc::XmlConfCurrent::proxyUser(); });
 	}
 
 	std::string proxyPass() const final
 	{
 		return proxyConf(&QNetworkProxy::password,
-			QStringLiteral("ProxyPass"), [this] { return digidoc::XmlConfCurrent::proxyPass(); });
+			Settings::PROXY_PASS, [this] { return digidoc::XmlConfCurrent::proxyPass(); });
 	}
 
 #ifdef Q_OS_MAC
 	bool proxyTunnelSSL() const final
-	{ return s.value(QStringLiteral("ProxyTunnelSSL"), digidoc::XmlConfCurrent::proxyTunnelSSL()).toBool(); }
+	{ return Settings::PROXY_TUNNEL_SSL.value(digidoc::XmlConfCurrent::proxyTunnelSSL()); }
 	bool PKCS12Disable() const final
-	{ return s.value(QStringLiteral("PKCS12Disable"), digidoc::XmlConfCurrent::PKCS12Disable()).toBool(); }
+	{ return Settings::PKCS12_DISABLE.value(digidoc::XmlConfCurrent::PKCS12Disable()); }
 	std::string TSLCache() const final
 	{ return QStandardPaths::writableLocation(QStandardPaths::AppLocalDataLocation).toStdString(); }
 	bool TSLOnlineDigest() const final
-	{ return s.value(QStringLiteral("TSLOnlineDigest"), digidoc::XmlConfCurrent::TSLOnlineDigest()).toBool(); }
+	{ return Settings::TSL_ONLINE_DIGEST.value(digidoc::XmlConfCurrent::TSLOnlineDigest()); }
 
 	void setProxyHost( const std::string &host ) final
-	{ SettingsDialog::setValueEx(QStringLiteral("ProxyHost"), fromStdString(host)); }
+	{ Settings::PROXY_HOST = host; }
 	void setProxyPort( const std::string &port ) final
-	{ SettingsDialog::setValueEx(QStringLiteral("ProxyPort"), fromStdString(port)); }
+	{ Settings::PROXY_PORT = port; }
 	void setProxyUser( const std::string &user ) final
-	{ SettingsDialog::setValueEx(QStringLiteral("ProxyUser"), fromStdString(user)); }
+	{ Settings::PROXY_USER = user; }
 	void setProxyPass( const std::string &pass ) final
-	{ SettingsDialog::setValueEx(QStringLiteral("ProxyPass"), fromStdString(pass)); }
+	{ Settings::PROXY_PASS = pass; }
 	void setProxyTunnelSSL( bool enable ) final
-	{ SettingsDialog::setValueEx(QStringLiteral("ProxyTunnelSSL"), enable, digidoc::XmlConfCurrent::proxyTunnelSSL()); }
+	{ Settings::PROXY_TUNNEL_SSL.setValue(enable, digidoc::XmlConfCurrent::proxyTunnelSSL()); }
 	void setPKCS12Cert( const std::string & /*cert*/) final {}
 	void setPKCS12Pass( const std::string & /*pass*/) final {}
 	void setPKCS12Disable( bool disable ) final
-	{ SettingsDialog::setValueEx(QStringLiteral("PKCS12Disable"), disable, digidoc::XmlConfCurrent::PKCS12Disable()); }
+	{ Settings::PKCS12_DISABLE.setValue(disable, digidoc::XmlConfCurrent::PKCS12Disable()); }
 	void setTSLOnlineDigest( bool enable ) final
-	{ SettingsDialog::setValueEx(QStringLiteral("TSLOnlineDigest"), enable, digidoc::XmlConfCurrent::TSLOnlineDigest()); }
+	{ Settings::TSL_ONLINE_DIGEST.setValue(enable, digidoc::XmlConfCurrent::TSLOnlineDigest()); }
 #endif
 
 	std::vector<digidoc::X509Cert> TSCerts() const final
 	{
 		std::vector<digidoc::X509Cert> list = toCerts(QLatin1String("CERT-BUNDLE"));
-		if(digidoc::X509Cert cert = toCert(fromBase64(s.value(QStringLiteral("TSA-CERT")))))
+		if(digidoc::X509Cert cert = toCert(fromBase64(QVariant(Settings::TSA_CERT))))
 			list.push_back(cert);
 		return list;
 	}
 
 	std::string TSUrl() const final
 	{
-		if(s.value(QStringLiteral("TSA-URL-CUSTOM"), s.contains(QStringLiteral("TSA-URL"))).toBool())
-			return valueUserScope(QStringLiteral("TSA-URL"), digidoc::XmlConfCurrent::TSUrl());
-		return valueSystemScope(QStringLiteral("TSA-URL"), digidoc::XmlConfCurrent::TSUrl());
+		if(Settings::TSA_URL_CUSTOM)
+			return valueUserScope(Settings::TSA_URL, digidoc::XmlConfCurrent::TSUrl());
+		return valueSystemScope(Settings::TSA_URL.KEY, digidoc::XmlConfCurrent::TSUrl());
 	}
 	void setTSUrl(const std::string &url) final
-	{ SettingsDialog::setValueEx(QStringLiteral("TSA-URL"), fromStdString(url)); }
+	{ Settings::TSA_URL = url; }
 
-	std::string TSLUrl() const final { return valueSystemScope(QStringLiteral("TSL-URL"), digidoc::XmlConfCurrent::TSLUrl()); }
+	std::string TSLUrl() const final
+	{ return valueSystemScope(QLatin1String("TSL-URL"), digidoc::XmlConfCurrent::TSLUrl()); }
 	std::vector<digidoc::X509Cert> TSLCerts() const final
 	{
 		std::vector<digidoc::X509Cert> tslcerts = toCerts(QLatin1String("TSL-CERTS"));
@@ -196,10 +196,8 @@ class DigidocConf final: public digidoc::XmlConfCurrent
 
 	digidoc::X509Cert verifyServiceCert() const final
 	{
-		QByteArray cert = fromBase64(obj.value(QStringLiteral("SIVA-CERT")));
-		if(cert.isEmpty())
-			return digidoc::XmlConfCurrent::verifyServiceCert();
-		return toCert(cert);
+		QByteArray cert = fromBase64(obj.value(Settings::SIVA_CERT.KEY));
+		return cert.isEmpty() ? digidoc::XmlConfCurrent::verifyServiceCert() : toCert(cert);
 	}
 	std::vector<digidoc::X509Cert> verifyServiceCerts() const final
 	{
@@ -210,12 +208,12 @@ class DigidocConf final: public digidoc::XmlConfCurrent
 	}
 	std::string verifyServiceUri() const final
 	{
-		if(s.value(QStringLiteral("SIVA-URL-CUSTOM"), s.contains(QStringLiteral("SIVA-URL"))).toBool())
-			return valueUserScope(QStringLiteral("SIVA-URL"), digidoc::XmlConfCurrent::verifyServiceUri());
-		return valueSystemScope(QStringLiteral("SIVA-URL"), digidoc::XmlConfCurrent::verifyServiceUri());
+		if(Settings::SIVA_URL_CUSTOM)
+			return valueUserScope(Settings::SIVA_URL, digidoc::XmlConfCurrent::verifyServiceUri());
+		return valueSystemScope(Settings::SIVA_URL.KEY, digidoc::XmlConfCurrent::verifyServiceUri());
 	}
 	void setVerifyServiceUri(const std::string &url) final
-	{ SettingsDialog::setValueEx(QStringLiteral("SIVA-URL"), QString::fromStdString(url), QString()); }
+	{ Settings::SIVA_URL = url; }
 
 	std::string ocsp(const std::string &issuer) const final
 	{
@@ -225,7 +223,7 @@ class DigidocConf final: public digidoc::XmlConfCurrent
 			if(issuer == i.key().toStdString())
 				return i.value().toString().toStdString();
 		}
-		return obj.value(QStringLiteral("OCSP-URL")).toString(fromStdString(digidoc::XmlConfCurrent::ocsp(issuer))).toStdString();
+		return valueSystemScope(QLatin1String("OCSP-URL"), digidoc::XmlConfCurrent::ocsp(issuer));
 	}
 
 	bool TSLAllowExpired() const final
@@ -249,8 +247,8 @@ class DigidocConf final: public digidoc::XmlConfCurrent
 	void reload()
 	{
 		obj = qApp->conf()->object();
-		if(s.value(QStringLiteral("TSA-URL")) == obj.value(QStringLiteral("TSA-URL")))
-			s.remove(QStringLiteral("TSA-URL")); // Cleanup user conf if it is default url
+		if(Settings::TSA_URL == obj.value(Settings::TSA_URL.KEY).toString())
+			Settings::TSA_URL.clear(); // Cleanup user conf if it is default url
 		QList<QSslCertificate> list;
 		for(const auto &cert: obj.value(QStringLiteral("CERT-BUNDLE")).toArray())
 			list.append(QSslCertificate(fromBase64(cert), QSsl::Der));
@@ -260,23 +258,25 @@ class DigidocConf final: public digidoc::XmlConfCurrent
 	}
 #endif
 
-	std::string valueSystemScope(const QString &key, const std::string &defaultValue) const
+	template<class T>
+	std::string valueSystemScope(const T &key, std::string &&defaultValue) const
 	{
-		return obj.value(key).toString(fromStdString(defaultValue)).toStdString();
+		return obj.contains(key) ? obj.value(key).toString().toStdString() : std::forward<std::string>(defaultValue);
 	}
 
-	std::string valueUserScope(const QString &key, const std::string &defaultValue) const
+	template<typename Option>
+	std::string valueUserScope(const Option &option, std::string &&defaultValue) const
 	{
-		return s.value(key, obj.value(key).toString(fromStdString(defaultValue))).toString().toStdString();
+		return option.isSet() ? option : valueSystemScope(option.KEY, std::forward<std::string>(defaultValue));
 	}
 
-	template<typename System, typename Config>
-	std::string proxyConf(System &&system, const QString &key, Config &&config) const
+	template<typename System, typename Config, class Option>
+	std::string proxyConf(System &&system, const Option &option, Config &&config) const
 	{
-		switch(s.value(QStringLiteral("ProxyConfig")).toUInt())
+		switch(Settings::PROXY_CONFIG)
 		{
-		case 0: return {};
-		case 1: return std::invoke(system, [] {
+		case Settings::ProxyNone: return {};
+		case Settings::ProxySystem: return std::invoke(system, [] {
 				for(const QNetworkProxy &proxy: QNetworkProxyFactory::systemProxyForQuery())
 				{
 					if(proxy.type() == QNetworkProxy::HttpProxy)
@@ -284,7 +284,7 @@ class DigidocConf final: public digidoc::XmlConfCurrent
 				}
 				return QNetworkProxy{};
 			}()).toStdString();
-		default: return s.contains(key) ? s.value(key).toString().toStdString() : config();
+		default: return option.isSet() ? option : config();
 		}
 	}
 
@@ -310,9 +310,7 @@ class DigidocConf final: public digidoc::XmlConfCurrent
 		return certs;
 	}
 
-	static constexpr auto fromStdString = &QString::fromStdString;
-	QSettings s;
-	bool debug = false;
+	bool	debug = Settings::LIBDIGIDOCPP_DEBUG;
 public:
 	QJsonObject obj;
 };
@@ -389,7 +387,7 @@ Application::Application( int &argc, char **argv )
 	connect(d->newClientAction, &QAction::triggered, this, [&]{ showClient({}, false, false, true); });
 
 	// This is needed to release application from memory (Windows)
-	setQuitOnLastWindowClosed( true ); 
+	setQuitOnLastWindowClosed( true );
 	d->lastWindowTimer.setSingleShot(true);
 	connect(&d->lastWindowTimer, &QTimer::timeout, this, []{ if(topLevelWindows().isEmpty()) quit(); });
 	connect(this, &Application::lastWindowClosed, this, [&]{ d->lastWindowTimer.start(10s); });
@@ -452,7 +450,7 @@ Application::Application( int &argc, char **argv )
 	QTimer::singleShot(0, this, [this] {
 		QWidget *parent = mainWindow();
 #ifdef Q_OS_MAC
-		if(QSettings().value(QStringLiteral("plugins")).isNull())
+		if(!Settings::PLUGINS.isSet())
 		{
 			auto *dlg = new WarningDialog(tr(
 				"In order to authenticate and sign in e-services with an ID-card you need to install the web browser components."), parent);
@@ -465,15 +463,15 @@ Application::Application( int &argc, char **argv )
 				{
 				case QMessageBox::Open: QDesktopServices::openUrl(tr("https://www.id.ee/en/article/install-id-software/")); break;
 				case QMessageBox::Ignore: break;
-				default: QSettings().setValue(QStringLiteral("plugins"), "ignore");
+				default: Settings::PLUGINS = QStringLiteral("ignore");
 				}
 			});
 			dlg->open();
 		}
 #endif
-		if(QSettings().value(QStringLiteral("showIntro"), true).toBool())
+		if(Settings::SHOW_INTRO)
 		{
-			QSettings().setValue(QStringLiteral("showIntro"), false);
+			Settings::SHOW_INTRO = false;
 			auto *dlg = new FirstRun(parent);
 			connect(dlg, &FirstRun::langChanged, this, [this](const QString& lang) { loadTranslation( lang ); });
 			dlg->open();
@@ -611,6 +609,19 @@ Configuration* Application::conf()
 	return d->conf;
 }
 
+template<class T>
+QJsonValue Application::confValue(const T &key)
+{
+#ifdef CONFIG_URL
+	return qApp->conf()->object().value(key);
+#else
+	return {};
+#endif
+}
+
+template QJsonValue Application::confValue<QString>(const QString &key);
+template QJsonValue Application::confValue<QLatin1String>(const QLatin1String &key);
+
 QVariant Application::confValue( ConfParameter parameter, const QVariant &value )
 {
 	auto *i = static_cast<DigidocConf*>(digidoc::Conf::instance());
@@ -680,7 +691,7 @@ void Application::loadTranslation( const QString &lang )
 {
 	if( d->lang == lang )
 		return;
-	QSettings().setValue(QStringLiteral("Language"), d->lang = lang);
+	Settings::LANGUAGE = d->lang = lang;
 
 	if(lang == QLatin1String("en")) QLocale::setDefault(QLocale(QLocale::English, QLocale::UnitedKingdom));
 	else if(lang == QLatin1String("ru")) QLocale::setDefault(QLocale( QLocale::Russian, QLocale::RussianFederation));
@@ -830,14 +841,14 @@ void Application::migrateSettings()
 #endif
 	newSettings.remove(QStringLiteral("Client/Type"));
 
-	if(newSettings.value(QStringLiteral("SettingsMigrated"), false).toBool())
+	if(Settings::SETTINGS_MIGRATED)
 		return;
 
 #ifdef Q_OS_WIN
 	QSettings reg(QStringLiteral("HKEY_CURRENT_USER\\Software"), QSettings::NativeFormat);
 	if(!reg.childGroups().contains(QStringLiteral("Estonian ID Card")))
 	{
-		newSettings.setValue(QStringLiteral("SettingsMigrated"), true);
+		Settings::SETTINGS_MIGRATED = true;
 		return;
 	}
 
@@ -854,34 +865,34 @@ void Application::migrateSettings()
 #endif
 
 	static const QVector<QPair<QString,QString>> orgOldNewKeys {
-		{"showIntro", "showIntro"},
+		{"showIntro", Settings::SHOW_INTRO.KEY},
 		{"PKCS12Disable","PKCS12Disable"},
-		{"Client/MobileCode","MobileCode"},
-		{"Client/MobileNumber","MobileNumber"},
-		{"ProxyHost","ProxyHost"},
-		{"ProxyPass","ProxyPass"},
-		{"ProxyPort","ProxyPort"},
-		{"ProxyUser","ProxyUser"},
+		{"Client/MobileCode", Settings::MOBILEID_CODE.KEY},
+		{"Client/MobileNumber", Settings::MOBILEID_NUMBER.KEY},
+		{"ProxyHost", Settings::PROXY_HOST.KEY},
+		{"ProxyPass", Settings::PROXY_PASS.KEY},
+		{"ProxyPort", Settings::PROXY_PORT.KEY},
+		{"ProxyUser", Settings::PROXY_USER.KEY},
 		{"Client/City","City"},
 		{"Client/Country","Country"},
 		{"Client/Zip","Zip"},
 		{"Client/Role","Role"},
 		{"Client/State","State"},
 		{"Client/Resolution","Resolution"},
-		{"Main/language","Language"},
-		{"Client/DefaultDir","DefaultDir"},
+		{"Main/language", Settings::LANGUAGE.KEY},
+		{"Client/DefaultDir",  Settings::DEFAULT_DIR.KEY},
 		{"ProxyTunnelSSL","ProxyTunnelSSL"}
 	};
 
 	static const QVector<QPair<QString,QString>> appOldNewKeys {
 		{"TSLOnlineDigest", "TSLOnlineDigest"},
-		{"Client/proxyConfig", "ProxyConfig"},
-		{"lastPath", "lastPath"},
+		{"Client/proxyConfig",  Settings::PROXY_CONFIG.KEY},
+		{"lastPath", Settings::LAST_PATH.KEY},
 		{"LastCheck", "LastCheck"},
-		{"Client/RoleAddressInfo", "RoleAddressInfo"},
-		{"Client/ShowPrintSummary", "ShowPrintSummary"},
-		{"TSA-URL", "TSA-URL"},
-		{"MobileSettings", "MobileSettings"},
+		{"Client/RoleAddressInfo", Settings::SHOW_ROLE_ADDRESS_INFO.KEY},
+		{"Client/ShowPrintSummary",  Settings::SHOW_PRINT_SUMMARY.KEY},
+		{"TSA-URL", Settings::TSA_URL.KEY},
+		{"MobileSettings", Settings::MOBILEID_REMEMBER.KEY},
 	};
 
 	for(const QPair<QString,QString> &keypairs: orgOldNewKeys) {
@@ -917,13 +928,12 @@ void Application::migrateSettings()
 			newSettings.setValue(key, oldAppSettings.value(key));
 	}
 
-	newSettings.setValue(QStringLiteral("SettingsMigrated"), true);
+	Settings::SETTINGS_MIGRATED = true;
 
 #ifndef Q_OS_MAC
-	QString key = "proxyConfig";
-	if(!newSettings.contains("showIntro") && !newSettings.contains("ProxyConfig") && dd3Settings.contains(key))
+	if(!Settings::SHOW_INTRO && !Settings::PROXY_CONFIG.isSet() && dd3Settings.contains(Settings::PROXY_CONFIG.KEY))
 	{
-		newSettings.setValue("ProxyConfig", dd3Settings.value(key));
+		Settings::PROXY_CONFIG = dd3Settings.value(Settings::PROXY_CONFIG.KEY);
 		SettingsDialog::loadProxy(digidoc::Conf::instance());
 	}
 
diff --git a/client/Application.h b/client/Application.h
index 00eea9f30..32594414a 100644
--- a/client/Application.h
+++ b/client/Application.h
@@ -70,6 +70,8 @@ class Application final: public Common
 	void waitForTSL( const QString &file );
 
 	static void addRecent( const QString &file );
+	template<class T>
+	static QJsonValue confValue(const T &key);
 	static QVariant confValue(ConfParameter parameter, const QVariant &value = {});
 	static void clearConfValue( ConfParameter parameter );
 	static void initDiagnosticConf();
diff --git a/client/CMakeLists.txt b/client/CMakeLists.txt
index 5344d3e1c..5932bfae7 100644
--- a/client/CMakeLists.txt
+++ b/client/CMakeLists.txt
@@ -13,7 +13,7 @@ configure_file( translations/tr.qrc tr.qrc COPYONLY )
 qt_add_translation(SOURCES translations/en.ts translations/et.ts translations/ru.ts)
 
 add_executable(${PROJECT_NAME} WIN32 MACOSX_BUNDLE
-    ${PROJECT_NAME}.rc
+	${PROJECT_NAME}.rc
 	${SOURCES}
 	images/images.qrc
 	fonts/fonts.qrc
@@ -41,6 +41,7 @@ add_executable(${PROJECT_NAME} WIN32 MACOSX_BUNDLE
 	sslConnect.cpp
 	Styles.cpp
 	PrintSheet.cpp
+	Settings.cpp
 	SslCertificate.cpp
 	TokenData.cpp
 	dialogs/AccessCert.cpp
@@ -137,21 +138,21 @@ endif()
 
 if(${QT_VERSION_MAJOR} STREQUAL "6")
 	find_package(Qt6 COMPONENTS Core5Compat SvgWidgets REQUIRED)
-    target_link_libraries(${PROJECT_NAME} Qt6::Core5Compat Qt6::SvgWidgets)
+	target_link_libraries(${PROJECT_NAME} Qt6::Core5Compat Qt6::SvgWidgets)
 elseif(WIN32)
 	find_package(Qt5 COMPONENTS WinExtras)
-    target_compile_definitions(${PROJECT_NAME} PRIVATE QT_WIN_EXTRAS)
-    target_link_libraries(${PROJECT_NAME} Qt5::WinExtras)
+	target_compile_definitions(${PROJECT_NAME} PRIVATE QT_WIN_EXTRAS)
+	target_link_libraries(${PROJECT_NAME} Qt5::WinExtras)
 endif()
 
 set_target_properties(${PROJECT_NAME} PROPERTIES
 	AUTOUIC ON
 	AUTORCC ON
 	MACOSX_BUNDLE_INFO_PLIST ${CMAKE_CURRENT_SOURCE_DIR}/mac/Info.plist.cmake
-    MACOSX_BUNDLE_BUNDLE_NAME ${PROJECT_NAME}
-    MACOSX_BUNDLE_GUI_IDENTIFIER "ee.ria.${PROJECT_NAME}"
+	MACOSX_BUNDLE_BUNDLE_NAME ${PROJECT_NAME}
+	MACOSX_BUNDLE_GUI_IDENTIFIER "ee.ria.${PROJECT_NAME}"
 )
-target_include_directories(${PROJECT_NAME} PRIVATE ${CMAKE_SOURCE_DIR} ${LIBDIGIDOCPP_INCLUDE_DIR} )
+target_include_directories(${PROJECT_NAME} PRIVATE ${CMAKE_SOURCE_DIR} ${LIBDIGIDOCPP_INCLUDE_DIR})
 target_compile_definitions(${PROJECT_NAME} PRIVATE
 	MOBILEID_URL="${MOBILEID_URL}"
 	SMARTID_URL="${SMARTID_URL}"
@@ -168,58 +169,58 @@ if( APPLE )
 		set_source_files_properties( ${_file} PROPERTIES MACOSX_PACKAGE_LOCATION ${_file_dir})
 	endforeach(_file)
 
-    target_sources(${PROJECT_NAME} PRIVATE ${RESOURCE_FILES} Application_mac.mm MacMenuBar.cpp dialogs/CertificateDetails_mac.mm Diagnostics_unix.cpp)
+	target_sources(${PROJECT_NAME} PRIVATE ${RESOURCE_FILES} Application_mac.mm MacMenuBar.cpp dialogs/CertificateDetails_mac.mm Diagnostics_unix.cpp)
 	set_source_files_properties( Application_mac.mm dialogs/CertificateDetails_mac.mm PROPERTIES COMPILE_FLAGS "-fobjc-arc" )
 	set_source_files_properties( LdapSearch.cpp PROPERTIES COMPILE_FLAGS "-Wno-deprecated-declarations" )
-    target_link_libraries(${PROJECT_NAME} "-framework Security" "-framework Quartz" "-framework Cocoa" "-fobjc-arc")
-    add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
-        COMMAND cp -a ${PKCS11_MODULE} $<TARGET_FILE_DIR:${PROJECT_NAME}>
-        COMMAND mkdir -p $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Library/QuickLook
-        COMMAND cp -a $<TARGET_BUNDLE_DIR:DigiDocQL> $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Library/QuickLook
+	target_link_libraries(${PROJECT_NAME} "-framework Security" "-framework Quartz" "-framework Cocoa" "-fobjc-arc")
+	add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
+		COMMAND cp -a ${PKCS11_MODULE} $<TARGET_FILE_DIR:${PROJECT_NAME}>
+		COMMAND mkdir -p $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Library/QuickLook
+		COMMAND cp -a $<TARGET_BUNDLE_DIR:DigiDocQL> $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Library/QuickLook
 	)
-    add_custom_target(macdeployqt DEPENDS ${PROJECT_NAME}
-        COMMAND ${qtCore_install_prefix}/macdeployqt $<TARGET_BUNDLE_DIR:${PROJECT_NAME}>
-        COMMAND rm -rf $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/PlugIns/bearer
-        COMMAND cp -a /Library/Frameworks/digidocpp.framework $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks
-        COMMAND rm $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks/digidocpp.framework/Resources/digidoc-tool
-        COMMAND find $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks -name Headers | xargs rm -rf
-        COMMAND install_name_tool -delete_rpath /Library/Frameworks $<TARGET_FILE:${PROJECT_NAME}>
+	add_custom_target(macdeployqt DEPENDS ${PROJECT_NAME}
+		COMMAND ${qtCore_install_prefix}/macdeployqt $<TARGET_BUNDLE_DIR:${PROJECT_NAME}>
+		COMMAND rm -rf $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/PlugIns/bearer
+		COMMAND cp -a /Library/Frameworks/digidocpp.framework $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks
+		COMMAND rm $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks/digidocpp.framework/Resources/digidoc-tool
+		COMMAND find $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks -name Headers | xargs rm -rf
+		COMMAND install_name_tool -delete_rpath /Library/Frameworks $<TARGET_FILE:${PROJECT_NAME}>
 		COMMAND ln -sf digidocpp.framework/Libraries/libcrypto.dylib
-            $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks/libcrypto.1.1.dylib
+			$<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks/libcrypto.1.1.dylib
 		COMMAND ln -sf digidocpp.framework/Libraries/libssl.dylib
-            $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks/libssl.1.1.dylib
+			$<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks/libssl.1.1.dylib
 	)
 
-    add_custom_target(codesign DEPENDS ${PROJECT_NAME}
+	add_custom_target(codesign DEPENDS ${PROJECT_NAME}
 		COMMAND codesign -f -s \"$$SIGNCERT\"
-            $<TARGET_FILE_DIR:${PROJECT_NAME}>/*.*
-            $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks/digidocpp.framework/Libraries/*
-            $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks/*.framework
-            $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/PlugIns/*/*
-            $<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Library/QuickLook/DigiDocQL.qlgenerator
+			$<TARGET_FILE_DIR:${PROJECT_NAME}>/*.*
+			$<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks/digidocpp.framework/Libraries/*
+			$<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Frameworks/*.framework
+			$<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/PlugIns/*/*
+			$<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Library/QuickLook/DigiDocQL.qlgenerator
 		COMMAND if echo \"$$SIGNCERT\" | grep -q "Developer ID" \; then
-                codesign -f -s \"$$SIGNCERT\" $<TARGET_BUNDLE_DIR:${PROJECT_NAME}> --entitlements ${CMAKE_SOURCE_DIR}/${PROJECT_NAME}.eToken.entitlements\;
+				codesign -f -s \"$$SIGNCERT\" $<TARGET_BUNDLE_DIR:${PROJECT_NAME}> --entitlements ${CMAKE_SOURCE_DIR}/${PROJECT_NAME}.eToken.entitlements\;
 			else
-                codesign -f -s \"$$SIGNCERT\" $<TARGET_BUNDLE_DIR:${PROJECT_NAME}> --entitlements ${CMAKE_SOURCE_DIR}/${PROJECT_NAME}.entitlements\;
+				codesign -f -s \"$$SIGNCERT\" $<TARGET_BUNDLE_DIR:${PROJECT_NAME}> --entitlements ${CMAKE_SOURCE_DIR}/${PROJECT_NAME}.entitlements\;
 			fi
 	)
 
-    add_custom_target(productbuild DEPENDS ${PROJECT_NAME}
-        COMMAND productbuild --component $<TARGET_BUNDLE_DIR:${PROJECT_NAME}> /Applications
+	add_custom_target(productbuild DEPENDS ${PROJECT_NAME}
+		COMMAND productbuild --component $<TARGET_BUNDLE_DIR:${PROJECT_NAME}> /Applications
 			--sign \"$$INSTCERT\" ${CMAKE_BINARY_DIR}/qdigidoc4-store_${VERSION}$ENV{VER_SUFFIX}.pkg
 	)
-    add_custom_target(zip DEPENDS ${PROJECT_NAME}
-        COMMAND zip --symlinks -r -D ${CMAKE_BINARY_DIR}/qdigidoc4_${VERSION}$ENV{VER_SUFFIX}.zip ${PROJECT_NAME}.app
+	add_custom_target(zip DEPENDS ${PROJECT_NAME}
+		COMMAND zip --symlinks -r -D ${CMAKE_BINARY_DIR}/qdigidoc4_${VERSION}$ENV{VER_SUFFIX}.zip ${PROJECT_NAME}.app
 	)
-    add_custom_target(zipdebug DEPENDS ${PROJECT_NAME}
-        COMMAND dsymutil -o ${PROJECT_NAME}.dSYM $<TARGET_FILE:${PROJECT_NAME}>
-        COMMAND zip -r ${CMAKE_BINARY_DIR}/qdigidoc4-dbg_${VERSION}$ENV{VER_SUFFIX}.zip ${PROJECT_NAME}.dSYM
+	add_custom_target(zipdebug DEPENDS ${PROJECT_NAME}
+		COMMAND dsymutil -o ${PROJECT_NAME}.dSYM $<TARGET_FILE:${PROJECT_NAME}>
+		COMMAND zip -r ${CMAKE_BINARY_DIR}/qdigidoc4-dbg_${VERSION}$ENV{VER_SUFFIX}.zip ${PROJECT_NAME}.dSYM
 	)
 elseif(WIN32)
-    target_sources(${PROJECT_NAME} PRIVATE QCNG.cpp CertStore.cpp Diagnostics_win.cpp)
-    target_compile_options(${PROJECT_NAME} PRIVATE "/guard:cf")
-    target_link_options(${PROJECT_NAME} PRIVATE "/guard:cf" $<$<BOOL:${CROSSSIGNCERT}>:/INTEGRITYCHECK>)
-    target_link_libraries(${PROJECT_NAME} NCrypt Crypt32 Cryptui)
+	target_sources(${PROJECT_NAME} PRIVATE QCNG.cpp CertStore.cpp Diagnostics_win.cpp)
+	target_compile_options(${PROJECT_NAME} PRIVATE "/guard:cf")
+	target_link_options(${PROJECT_NAME} PRIVATE "/guard:cf" $<$<BOOL:${CROSSSIGNCERT}>:/INTEGRITYCHECK>)
+	target_link_libraries(${PROJECT_NAME} NCrypt Crypt32 Cryptui)
 	get_filename_component(LIBS_PATH ${LIBDIGIDOCPP_LIBRARIES} DIRECTORY)
 	if(CMAKE_SIZEOF_VOID_P EQUAL 8)
 		set(PLATFORM x64)
@@ -230,7 +231,7 @@ elseif(WIN32)
 	endif()
 	set(MSI_FILE "Digidoc4_Client-${VERSION}$ENV{VER_SUFFIX}.${PLATFORM}")
 	list(APPEND CANDLE_CMD "$ENV{WIX}bin\\candle.exe" -nologo -arch ${PLATFORM} -dMSI_VERSION=${VERSION} -dPlatform=${PLATFORM}
-        -dlibs_path="${LIBS_PATH}" -dclient_path=$<TARGET_FILE:${PROJECT_NAME}> -dico_path=${CMAKE_CURRENT_SOURCE_DIR}/images/digidoc.ico
+		-dlibs_path="${LIBS_PATH}" -dclient_path=$<TARGET_FILE:${PROJECT_NAME}> -dico_path=${CMAKE_CURRENT_SOURCE_DIR}/images/digidoc.ico
 		-dqtconf=${CMAKE_SOURCE_DIR}/qt.conf -dschemasLocation=${LIBS_PATH}/schema SchemasFragment.wxs
 		-dqt_ver_major=${QT_VERSION_MAJOR} -dqt_suffix=$<$<CONFIG:Debug>:d> ${CMAKE_SOURCE_DIR}/qdigidoc4.wxs
 		${CMAKE_SOURCE_DIR}/cmake/modules/WelcomeDlg2.wxs ${CMAKE_SOURCE_DIR}/cmake/modules/WixUI_Minimal2.wxs)
@@ -238,7 +239,7 @@ elseif(WIN32)
 		qdigidoc4.wixobj SchemasFragment.wixobj WelcomeDlg2.wixobj WixUI_Minimal2.wixobj
 		-dWixUIDialogBmp=${CMAKE_SOURCE_DIR}/cmake/modules/dlgbmp.bmp
 		-dWixUIBannerBmp=${CMAKE_SOURCE_DIR}/cmake/modules/banner.bmp)
-    add_custom_target(msi DEPENDS ${PROJECT_NAME}
+	add_custom_target(msi DEPENDS ${PROJECT_NAME}
 		COMMAND "$ENV{WIX}bin\\heat.exe" dir ${LIBS_PATH}/schema -nologo -cg Schemas -gg -scom -sreg -sfrag -srd -dr SchemaFolder -var var.schemasLocation -out SchemasFragment.wxs
 		COMMAND ${CANDLE_CMD}
 		COMMAND ${LIGHT_CMD} -loc ${CMAKE_SOURCE_DIR}/qdigidoc4.en-US.wxl -cultures:en-US -o "${MSI_FILE}.en-US.msi"
@@ -252,8 +253,8 @@ elseif(WIN32)
 	if(SIGNCERT)
 		list(APPEND SIGNCMD signtool.exe sign /a /v /s MY /n "${SIGNCERT}" /fd SHA256
 			/du http://installer.id.ee /tr http://sha256timestamp.ws.symantec.com/sha256/timestamp /td SHA256)
-        add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
-            COMMAND ${SIGNCMD} "$<$<BOOL:${CROSSSIGNCERT}>:/ph;/ac;${CROSSSIGNCERT}>" $<TARGET_FILE:${PROJECT_NAME}>
+		add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
+			COMMAND ${SIGNCMD} "$<$<BOOL:${CROSSSIGNCERT}>:/ph;/ac;${CROSSSIGNCERT}>" $<TARGET_FILE:${PROJECT_NAME}>
 			COMMAND_EXPAND_LISTS
 		)
 		add_custom_command(TARGET msi POST_BUILD
@@ -262,12 +263,12 @@ elseif(WIN32)
 		)
 	endif()
 	configure_file(${CMAKE_SOURCE_DIR}/AppxManifest.xml.cmake ${CMAKE_BINARY_DIR}/AppxManifest.xml)
-    add_custom_target(appx DEPENDS ${PROJECT_NAME}
+	add_custom_target(appx DEPENDS ${PROJECT_NAME}
 		COMMAND ${CMAKE_COMMAND} -E remove ${MSI_FILE}.appx
 		COMMAND ${CMAKE_COMMAND} -E remove_directory appx
 		COMMAND ${CMAKE_COMMAND} -E make_directory appx
 		COMMAND ${CMAKE_COMMAND} -E copy AppxManifest.xml appx
-        COMMAND ${CMAKE_COMMAND} -E copy $<TARGET_FILE:${PROJECT_NAME}> appx
+		COMMAND ${CMAKE_COMMAND} -E copy $<TARGET_FILE:${PROJECT_NAME}> appx
 		COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_SOURCE_DIR}/qt.conf appx
 		COMMAND ${CMAKE_COMMAND} -E copy ${LIBS_PATH}/798.p12 appx
 		COMMAND ${CMAKE_COMMAND} -E copy ${LIBS_PATH}/libcrypto-1_1${OPENSSL_SUFFIX}.dll appx
@@ -293,10 +294,10 @@ elseif(WIN32)
 	)
 else()
 	find_package( Threads REQUIRED )
-    target_sources(${PROJECT_NAME} PRIVATE Diagnostics_unix.cpp)
-    target_link_libraries(${PROJECT_NAME} Threads::Threads )
+	target_sources(${PROJECT_NAME} PRIVATE Diagnostics_unix.cpp)
+	target_link_libraries(${PROJECT_NAME} Threads::Threads )
 	configure_file( qdigidoc4.1.cmake qdigidoc4.1 )
-    install(TARGETS ${PROJECT_NAME} DESTINATION ${CMAKE_INSTALL_BINDIR})
+	install(TARGETS ${PROJECT_NAME} DESTINATION ${CMAKE_INSTALL_BINDIR})
 	install( FILES ${CMAKE_CURRENT_BINARY_DIR}/qdigidoc4.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1 )
 	install( FILES qdigidoc4.desktop DESTINATION ${CMAKE_INSTALL_DATADIR}/applications )
 	install( FILES qdigidoc4.xml DESTINATION ${CMAKE_INSTALL_DATADIR}/mime/packages )
diff --git a/client/CryptoDoc.cpp b/client/CryptoDoc.cpp
index ac6dde463..69798c741 100644
--- a/client/CryptoDoc.cpp
+++ b/client/CryptoDoc.cpp
@@ -41,7 +41,6 @@
 #include <QtCore/QUrl>
 #include <QtCore/QXmlStreamReader>
 #include <QtCore/QXmlStreamWriter>
-#include <QtCore/QSettings>
 #include <QtGui/QDesktopServices>
 #include <QtNetwork/QSslKey>
 
diff --git a/client/Diagnostics.cpp b/client/Diagnostics.cpp
index ec8bfb27d..45e42eec4 100644
--- a/client/Diagnostics.cpp
+++ b/client/Diagnostics.cpp
@@ -22,9 +22,8 @@
 #include "QPCSC.h"
 
 #ifdef CONFIG_URL
-#include "Configuration.h"
+#include "Settings.h"
 #include <QtCore/QJsonObject>
-#include <QtCore/QSettings>
 #endif
 
 #include <QtCore/QDir>
@@ -38,21 +37,14 @@ void Diagnostics::generalInfo(QTextStream &s)
 		<< "<b>" << "URLs:" << "</b>"
 #ifdef CONFIG_URL
 		<< "<br />CONFIG_URL: " << CONFIG_URL
-		<< "<br />SID-PROXY-URL: " << qApp->conf()->object().value(QStringLiteral("SID-PROXY-URL")).toString(QStringLiteral(SMARTID_URL))
-		<< "<br />SIDV2-PROXY-URL: " << qApp->conf()->object().value(QStringLiteral("SIDV2-PROXY-URL")).toString(QStringLiteral(SMARTID_URL))
-		<< "<br />SID-SK-URL: " << qApp->conf()->object().value(QStringLiteral("SID-SK-URL")).toString(QStringLiteral(SMARTID_URL))
-		<< "<br />SIDV2-SK-URL: " << qApp->conf()->object().value(QStringLiteral("SIDV2-SK-URL")).toString(QStringLiteral(SMARTID_URL))
-		<< "<br />MID-PROXY-URL: " << qApp->conf()->object().value(QStringLiteral("MID-PROXY-URL")).toString(QStringLiteral(MOBILEID_URL))
-		<< "<br />MID-SK-URL: " << qApp->conf()->object().value(QStringLiteral("MID-SK-URL")).toString(QStringLiteral(MOBILEID_URL))
-		<< "<br />RPUUID: " << (QSettings().value(QStringLiteral("MIDUUID-CUSTOM"), QSettings().contains(QStringLiteral("MIDUUID"))).toBool() ? tr("is set manually") : tr("is set by default"))
-#else
-#ifdef MOBILEID_URL
-		<< "<br />MOBILEID_URL: " << MOBILEID_URL
-#endif
-#ifdef SMARTID_URL
-		<< "<br />SMARTID_URL: " << SMARTID_URL
-#endif
 #endif
+		<< "<br />SID-PROXY-URL: " << qApp->confValue(QLatin1String("SID-PROXY-URL")).toString(QStringLiteral(SMARTID_URL))
+		<< "<br />SIDV2-PROXY-URL: " << qApp->confValue(QLatin1String("SIDV2-PROXY-URL")).toString(QStringLiteral(SMARTID_URL))
+		<< "<br />SID-SK-URL: " << qApp->confValue(QLatin1String("SID-SK-URL")).toString(QStringLiteral(SMARTID_URL))
+		<< "<br />SIDV2-SK-URL: " << qApp->confValue(QLatin1String("SIDV2-SK-URL")).toString(QStringLiteral(SMARTID_URL))
+		<< "<br />MID-PROXY-URL: " << Settings::MID_PROXY_URL
+		<< "<br />MID-SK-URL: " << Settings::MID_SK_URL
+		<< "<br />RPUUID: " << (Settings::MID_UUID_CUSTOM ? tr("is set manually") : tr("is set by default"))
 		<< "<br />TSL_URL: " << qApp->confValue(Application::TSLUrl).toString()
 		<< "<br />TSA_URL: " << qApp->confValue(Application::TSAUrl).toString()
 		<< "<br />SIVA_URL: " << qApp->confValue(Application::SiVaUrl).toString()
@@ -72,7 +64,7 @@ void Diagnostics::generalInfo(QTextStream &s)
 
 #ifdef CONFIG_URL
 	s << "<b>" << tr("Central Configuration") << ":</b>";
-	QJsonObject metainf = qApp->conf()->object().value(QStringLiteral("META-INF")).toObject();
+	QJsonObject metainf = qApp->confValue(QLatin1String("META-INF")).toObject();
 	for(QJsonObject::const_iterator i = metainf.constBegin(), end = metainf.constEnd(); i != end; ++i)
 	{
 		if(i.value().type() == QJsonValue::Double)
diff --git a/client/DocumentModel.cpp b/client/DocumentModel.cpp
index d82f72867..bb5115d6d 100644
--- a/client/DocumentModel.cpp
+++ b/client/DocumentModel.cpp
@@ -23,9 +23,6 @@
 #include "dialogs/FileDialog.h"
 #include "dialogs/WarningDialog.h"
 
-#include <common/Configuration.h>
-
-#include <QtCore/QJsonObject>
 #include <QtCore/QJsonArray>
 #include <QtCore/QFileInfo>
 #include <QtCore/QProcessEnvironment>
@@ -47,19 +44,13 @@ QStringList DocumentModel::tempFiles() const
 	{
 		QFileInfo f(save(i, FileDialog::tempPath(data(i))));
 		if(f.exists())
-			copied << f.absoluteFilePath();
+			copied.append(f.absoluteFilePath());
 	}
-
 	return copied;
 }
 
 bool DocumentModel::verifyFile(const QString &f)
 {
-	QJsonObject obj;
-#ifdef CONFIG_URL
-	obj = qApp->conf()->object();
-#endif
-
 	static const QJsonArray defaultArray {
 			QStringLiteral("ddoc"), QStringLiteral("bdoc") ,QStringLiteral("edoc"), QStringLiteral("adoc"), QStringLiteral("asice"), QStringLiteral("cdoc"), QStringLiteral("asics"),
 			QStringLiteral("txt"), QStringLiteral("doc"), QStringLiteral("docx"), QStringLiteral("odt"), QStringLiteral("ods"), QStringLiteral("tex"), QStringLiteral("wks"), QStringLiteral("wps"),
@@ -67,12 +58,12 @@ bool DocumentModel::verifyFile(const QString &f)
 			QStringLiteral("pps"), QStringLiteral("ppt"), QStringLiteral("pptx"), QStringLiteral("png"), QStringLiteral("jpg"), QStringLiteral("jpeg"), QStringLiteral("bmp"), QStringLiteral("ai"),
 			QStringLiteral("gif"), QStringLiteral("ico"), QStringLiteral("ps"), QStringLiteral("psd"), QStringLiteral("tif"), QStringLiteral("tiff"), QStringLiteral("csv")};
 
-	QJsonArray allowedExts = obj.value(QLatin1String("ALLOWED-EXTENSIONS")).toArray(defaultArray);
-
+	QJsonArray allowedExts = qApp->confValue(QLatin1String("ALLOWED-EXTENSIONS")).toArray(defaultArray);
 	if(!allowedExts.contains(QJsonValue(QFileInfo(f).suffix().toLower()))){
-		WarningDialog dlg(tr("A file with this extension cannot be opened in the DigiDoc4 Client. Download the file to view it."), qApp->activeWindow());
-		dlg.setCancelText(tr("OK"));
-		dlg.exec();
+		auto *dlg = new WarningDialog(tr("A file with this extension cannot be opened in the DigiDoc4 Client. Download the file to view it."), qApp->activeWindow());
+		dlg->setAttribute(Qt::WA_DeleteOnClose);
+		dlg->setCancelText(tr("OK"));
+		dlg->open();
 		return false;
 	}
 
diff --git a/client/DocumentModel.h b/client/DocumentModel.h
index f84545dcf..ec1459cff 100644
--- a/client/DocumentModel.h
+++ b/client/DocumentModel.h
@@ -43,5 +43,5 @@ class DocumentModel: public QObject
 	void removed(int row);
 
 protected:
-	bool verifyFile(const QString &f);
+	static bool verifyFile(const QString &f);
 };
diff --git a/client/MainWindow.cpp b/client/MainWindow.cpp
index 7b712e262..5d42eafc0 100644
--- a/client/MainWindow.cpp
+++ b/client/MainWindow.cpp
@@ -28,6 +28,7 @@
 #include "PrintSheet.h"
 #include "QPCSC.h"
 #include "QSigner.h"
+#include "Settings.h"
 #include "Styles.h"
 #include "sslConnect.h"
 #include "TokenData.h"
@@ -49,7 +50,6 @@
 #include "widgets/WarningList.h"
 
 #include <QtCore/QMimeData>
-#include <QtCore/QSettings>
 #include <QtCore/QStandardPaths>
 #include <QtCore/QUrlQuery>
 #include <QtGui/QDesktopServices>
@@ -375,8 +375,7 @@ void MainWindow::navigateToPage( Pages page, const QStringList &files, bool crea
 		std::unique_ptr<DigiDoc> signatureContainer(new DigiDoc(this));
 		if(create)
 		{
-			QString defaultDir = QSettings().value(QStringLiteral("DefaultDir")).toString();
-			QString filename = FileDialog::createNewFileName(files[0], QStringLiteral(".asice"), tr("signature container"), defaultDir, this);
+			QString filename = FileDialog::createNewFileName(files[0], true, this);
 			if(!filename.isNull())
 			{
 				signatureContainer->create(filename);
@@ -406,8 +405,7 @@ void MainWindow::navigateToPage( Pages page, const QStringList &files, bool crea
 
 		if(create)
 		{
-			QString defaultDir = QSettings().value(QStringLiteral("DefaultDir")).toString();
-			QString filename = FileDialog::createNewFileName(files[0], QStringLiteral(".cdoc"), tr("crypto container"), defaultDir, this);
+			QString filename = FileDialog::createNewFileName(files[0], false, this);
 			if(!filename.isNull())
 			{
 				cryptoContainer->clear(filename);
@@ -510,8 +508,7 @@ void MainWindow::convertToBDoc()
 
 void MainWindow::convertToCDoc()
 {
-	QString defaultDir = QSettings().value(QStringLiteral("Client/DefaultDir")).toString();
-	QString filename = FileDialog::createNewFileName(digiDoc->fileName(), QStringLiteral(".cdoc"), tr("crypto container"), defaultDir, this);
+	QString filename = FileDialog::createNewFileName(digiDoc->fileName(), false, this);
 	if(filename.isNull())
 		return;
 
@@ -818,11 +815,11 @@ QString MainWindow::selectFile( const QString &title, const QString &filename, b
 	QString active;
 	if( fixedExt )
 	{
-		if(ext == QLatin1String("bdoc")) exts << bdoc;
-		if(ext == QLatin1String("cdoc")) exts << cdoc;
-		if(ext == QLatin1String("asice") || ext == QLatin1String("sce")) exts << asic;
-		if(ext == QLatin1String("edoc")) exts << edoc;
-		if(ext == QLatin1String("adoc")) exts << adoc;
+		if(ext == QLatin1String("bdoc")) exts.append(bdoc);
+		if(ext == QLatin1String("cdoc")) exts.append(cdoc);
+		if(ext == QLatin1String("asice") || ext == QLatin1String("sce")) exts.append(asic);
+		if(ext == QLatin1String("edoc")) exts.append(edoc);
+		if(ext == QLatin1String("adoc")) exts.append(adoc);
 	}
 	else
 	{
@@ -1094,8 +1091,7 @@ void MainWindow::warningClicked(const QString &link)
 
 bool MainWindow::wrap(const QString& wrappedFile, bool enclose)
 {
-	QString defaultDir = QSettings().value(QStringLiteral("DefaultDir")).toString();
-	QString filename = FileDialog::createNewFileName(wrappedFile, QStringLiteral(".asice"), tr("signature container"), defaultDir, this);
+	QString filename = FileDialog::createNewFileName(wrappedFile, true, this);
 	if(filename.isNull())
 		return false;
 
diff --git a/client/Settings.cpp b/client/Settings.cpp
new file mode 100644
index 000000000..12ffab6e1
--- /dev/null
+++ b/client/Settings.cpp
@@ -0,0 +1,91 @@
+/*
+ * QDigiDoc4
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include "Settings.h"
+
+#include "Application.h"
+
+#include <QtCore/QJsonValue>
+
+template<class T, class D = T>
+using Option = Settings::Option<T, D>;
+
+const Option<QString> Settings::MID_UUID { QStringLiteral("MIDUUID") };
+const Option<QString> Settings::MID_NAME { QStringLiteral("MIDNAME"), QStringLiteral("RIA DigiDoc") };
+const Option<QString, QString (*)()> Settings::MID_PROXY_URL { QStringLiteral("MID-PROXY-URL"), [] {
+	return qApp->confValue(QLatin1String("MID-PROXY-URL")).toString(QStringLiteral(MOBILEID_URL));
+}};
+const Option<QString, QString (*)()> Settings::MID_SK_URL { QStringLiteral("MID-SK-URL"), [] {
+	return qApp->confValue(QLatin1String("MID-SK-URL")).toString(QStringLiteral(MOBILEID_URL));
+}};
+const Option<bool, bool (*)()> Settings::MID_UUID_CUSTOM
+	{ QStringLiteral("MIDUUID-CUSTOM"), [] { return Settings::MID_UUID.isSet(); } };
+const Option<bool> Settings::MOBILEID_REMEMBER { QStringLiteral("MobileSettings"), true };
+const Option<QString> Settings::MOBILEID_CODE { QStringLiteral("MobileCode") };
+const Option<QString> Settings::MOBILEID_NUMBER { QStringLiteral("MobileNumber") };
+const Option<bool> Settings::MOBILEID_ORDER { QStringLiteral("MIDOrder"), true };
+
+const Option<QString> Settings::SID_UUID { QStringLiteral("SIDUUID") };
+const Option<QString> Settings::SID_NAME { QStringLiteral("SIDNAME"), QStringLiteral("RIA DigiDoc") };
+const Option<QString, QString (*)()> Settings::SID_PROXY_URL { QStringLiteral("SID-PROXY-URL"), []{
+	return qApp->confValue(QLatin1String("SIDV2-PROXY-URL")).toString(qApp->confValue(QLatin1String("SID-PROXY-URL")).toString(QStringLiteral(SMARTID_URL)));
+}};
+const Option<QString, QString (*)()> Settings::SID_SK_URL { QStringLiteral("SID-SK-URL"), []{
+	return qApp->confValue(QLatin1String("SIDV2-SK-URL")).toString(qApp->confValue(QLatin1String("SID-SK-URL")).toString(QStringLiteral(SMARTID_URL)));
+}};
+const Option<bool, bool (*)()> Settings::SID_UUID_CUSTOM
+	{ QStringLiteral("SIDUUID-CUSTOM"), [] { return Settings::SID_UUID.isSet(); } };
+const Option<bool> Settings::SMARTID_REMEMBER { QStringLiteral("SmartIDSettings"), true };
+const Option<QString> Settings::SMARTID_CODE { QStringLiteral("SmartID") };
+const Option<QString> Settings::SMARTID_COUNTRY { QStringLiteral("SmartIDCountry"), QStringLiteral("EE") };
+const QStringList Settings::SMARTID_COUNTRY_LIST = {
+	QStringLiteral("EE"),
+	QStringLiteral("LT"),
+	QStringLiteral("LV"),
+};
+
+const Option<QByteArray> Settings::SIVA_CERT { QStringLiteral("SIVA-CERT") };
+const Option<QString> Settings::SIVA_URL { QStringLiteral("SIVA-URL") };
+const Option<bool, bool (*)()> Settings::SIVA_URL_CUSTOM
+	{ QStringLiteral("SIVA-URL-CUSTOM"), [] { return Settings::SIVA_URL.isSet(); } };
+const Option<QByteArray> Settings::TSA_CERT { QStringLiteral("TSA-CERT") };
+const Option<QString> Settings::TSA_URL { QStringLiteral("TSA-URL") };
+const Option<bool, bool (*)()> Settings::TSA_URL_CUSTOM
+	{ QStringLiteral("TSA-URL-CUSTOM"), [] { return Settings::TSA_URL.isSet(); } };
+
+const Option<QString> Settings::DEFAULT_DIR { QStringLiteral("DefaultDir") };
+const Option<QString> Settings::LANGUAGE { QStringLiteral("Language") };
+const Option<QString> Settings::LAST_PATH { QStringLiteral("lastPath") };
+const Option<bool> Settings::LIBDIGIDOCPP_DEBUG { QStringLiteral("LibdigidocppDebug"), false };
+const Option<bool> Settings::SETTINGS_MIGRATED { QStringLiteral("SettingsMigrated"), false };
+const Option<bool> Settings::SHOW_INTRO { QStringLiteral("showIntro"), true };
+const Option<bool> Settings::SHOW_PRINT_SUMMARY { QStringLiteral("ShowPrintSummary"), false };
+const Option<bool> Settings::SHOW_ROLE_ADDRESS_INFO { QStringLiteral("RoleAddressInfo"), false };
+
+const Option<Settings::ProxyConfig> Settings::PROXY_CONFIG { QStringLiteral("ProxyConfig"), Settings::ProxyNone };
+const Option<QString> Settings::PROXY_HOST { QStringLiteral("ProxyHost") };
+const Option<QString> Settings::PROXY_PORT { QStringLiteral("ProxyPort") };
+const Option<QString> Settings::PROXY_USER { QStringLiteral("ProxyUser") };
+const Option<QString> Settings::PROXY_PASS { QStringLiteral("ProxyPass") };
+#ifdef Q_OS_MAC
+const Option<bool> Settings::PROXY_TUNNEL_SSL { QStringLiteral("ProxyTunnelSSL"), false };
+const Option<bool> Settings::PKCS12_DISABLE { QStringLiteral("PKCS12Disable"), false };
+const Option<QString> Settings::PLUGINS { QStringLiteral("plugins") };
+const Option<bool> Settings::TSL_ONLINE_DIGEST { QStringLiteral("TSLOnlineDigest"), true };
+#endif
diff --git a/client/Settings.h b/client/Settings.h
new file mode 100644
index 000000000..4b485ef69
--- /dev/null
+++ b/client/Settings.h
@@ -0,0 +1,131 @@
+/*
+ * QDigiDoc4
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#pragma once
+
+#include <QtCore/QSettings>
+
+template<typename T>
+using if_QString = std::enable_if_t<std::is_same_v<T,QString>, bool>;
+
+struct Settings
+{
+	template<class T, class D = T>
+	struct Option
+	{
+		operator QVariant() const {
+			return QSettings().value(KEY, defaultValue());
+		}
+		operator T() const {
+			return operator QVariant().template value<T>();
+		}
+		template <typename P = T, typename = if_QString<P>>
+		operator std::string() const {
+			return operator T().toStdString();
+		}
+		void operator =(const QVariant &value) const {
+			setValue(value, defaultValue());
+		}
+		void operator =(const T &value) const {
+			operator =(QVariant(value));
+		}
+		template <typename P = T, typename = if_QString<P>>
+		void operator =(const std::string &value) const {
+			operator =(QString::fromStdString(value));
+		}
+		void clear() const {
+			QSettings().remove(KEY);
+		}
+		bool isSet() const {
+			return QSettings().contains(KEY);
+		}
+		T value(const QVariant &def) const {
+			return QSettings().value(KEY, def).template value<T>();
+		}
+		void setValue(const QVariant &value, const QVariant &def = {}) const {
+			if(bool valueIsNullOrEmpty = value.type() == QVariant::String ? value.toString().isEmpty() : value.isNull();
+				value == def || (def.isNull() && valueIsNullOrEmpty))
+				clear();
+			else
+				QSettings().setValue(KEY, value);
+		}
+		T defaultValue() const {
+			if constexpr (std::is_invocable_v<D>)
+				return DEFAULT();
+			else
+				return DEFAULT;
+		}
+		const QString KEY;
+		const D DEFAULT {};
+	};
+
+	static const Option<QString> MID_UUID;
+	static const Option<QString> MID_NAME;
+	static const Option<QString, QString (*)()> MID_PROXY_URL;
+	static const Option<QString, QString (*)()> MID_SK_URL;
+	static const Option<bool, bool (*)()> MID_UUID_CUSTOM;
+	static const Option<bool> MOBILEID_REMEMBER;
+	static const Option<QString> MOBILEID_CODE;
+	static const Option<QString> MOBILEID_NUMBER;
+	static const Option<bool> MOBILEID_ORDER;
+
+	static const Option<QString> SID_UUID;
+	static const Option<QString> SID_NAME;
+	static const Option<QString, QString (*)()> SID_PROXY_URL;
+	static const Option<QString, QString (*)()> SID_SK_URL;
+	static const Option<bool, bool (*)()> SID_UUID_CUSTOM;
+	static const Option<bool> SMARTID_REMEMBER;
+	static const Option<QString> SMARTID_CODE;
+	static const Option<QString> SMARTID_COUNTRY;
+	static const QStringList SMARTID_COUNTRY_LIST;
+
+	static const Option<QByteArray> SIVA_CERT;
+	static const Option<QString> SIVA_URL;
+	static const Option<bool, bool (*)()> SIVA_URL_CUSTOM;
+	static const Option<QByteArray> TSA_CERT;
+	static const Option<QString> TSA_URL;
+	static const Option<bool, bool (*)()> TSA_URL_CUSTOM;
+
+	static const Option<QString> DEFAULT_DIR;
+	static const Option<QString> LANGUAGE;
+	static const Option<QString> LAST_PATH;
+	static const Option<bool> LIBDIGIDOCPP_DEBUG;
+	static const Option<bool> SETTINGS_MIGRATED;
+	static const Option<bool> SHOW_INTRO;
+	static const Option<bool> SHOW_PRINT_SUMMARY;
+	static const Option<bool> SHOW_ROLE_ADDRESS_INFO;
+
+	enum ProxyConfig {
+		ProxyNone,
+		ProxySystem,
+		ProxyManual,
+	};
+	static const Option<ProxyConfig> PROXY_CONFIG;
+	static const Option<QString> PROXY_HOST;
+	static const Option<QString> PROXY_PORT;
+	static const Option<QString> PROXY_USER;
+	static const Option<QString> PROXY_PASS;
+#ifdef Q_OS_MAC
+	static const Option<bool> PROXY_TUNNEL_SSL;
+	static const Option<bool> PKCS12_DISABLE;
+	static const Option<QString> PLUGINS;
+	static const Option<bool> TSL_ONLINE_DIGEST;
+#endif
+};
+Q_DECLARE_METATYPE(Settings::ProxyConfig)
diff --git a/client/dialogs/AddRecipients.cpp b/client/dialogs/AddRecipients.cpp
index e7b0a3c5f..3e56ad92c 100644
--- a/client/dialogs/AddRecipients.cpp
+++ b/client/dialogs/AddRecipients.cpp
@@ -169,12 +169,12 @@ void AddRecipients::addRecipientFromFile()
 	}
 	if( cert.isNull() )
 	{
-		WarningDialog::show( this, tr("Failed to read certificate"));
+		WarningDialog::show(this, tr("Failed to read certificate"));
 	}
 	else if( !SslCertificate( cert ).keyUsage().contains( SslCertificate::KeyEncipherment ) &&
 		!SslCertificate( cert ).keyUsage().contains( SslCertificate::KeyAgreement ) )
 	{
-		WarningDialog::show( this, tr("This certificate cannot be used for encryption"));
+		WarningDialog::show(this, tr("This certificate cannot be used for encryption"));
 	}
 	else if(AddressItem *item = addRecipientToLeftPane(cert))
 	{
@@ -278,12 +278,7 @@ void AddRecipients::addSelectedCerts(const QList<HistoryCertData>& selectedCertD
 
 QString AddRecipients::defaultUrl(QLatin1String key, const QString &defaultValue)
 {
-#ifdef CONFIG_URL
-	return qApp->conf()->object().value(key).toString(defaultValue);
-#else
-	Q_UNUSED(key)
-	return defaultValue;
-#endif
+	return qApp->confValue(key).toString(defaultValue);
 }
 
 void AddRecipients::enableRecipientFromCard()
diff --git a/client/dialogs/FileDialog.cpp b/client/dialogs/FileDialog.cpp
index 61a8be9f3..6d474a344 100644
--- a/client/dialogs/FileDialog.cpp
+++ b/client/dialogs/FileDialog.cpp
@@ -20,13 +20,13 @@
 #include "FileDialog.h"
 
 #include "Application.h"
+#include "Settings.h"
 #include "dialogs/WarningDialog.h"
 
 #include <QtCore/QCoreApplication>
 #include <QtCore/QRegularExpression>
 #include <QtCore/QStandardPaths>
 #include <QtCore/QTemporaryFile>
-#include <QtCore/QSettings>
 #include <QtWidgets/QMessageBox>
 
 #include <algorithm>
@@ -40,7 +40,7 @@ class CPtr
 {
 	T *d;
  public:
-	CPtr(T *p = nullptr): d(p) {}
+	explicit CPtr(T *p = {}): d(p) {}
 	~CPtr() { if(d) d->Release(); }
 	inline T* operator->() const { return d; }
 	inline operator T*() const { return d; }
@@ -50,8 +50,12 @@ class CPtr
 
 #include <array>
 
-QString FileDialog::createNewFileName(const QString &file, const QString &extension, const QString &type, const QString &defaultDir, QWidget *parent)
+QString FileDialog::createNewFileName(const QString &file, bool signature, QWidget *parent)
 {
+	const QString extension = signature ? QStringLiteral(".asice") : QStringLiteral(".cdoc");
+	const QString type = signature ? tr("signature container") : tr("crypto container");
+	QString capitalized = type[0].toUpper() + type.mid(1);
+	const QString defaultDir = Settings::DEFAULT_DIR;
 	const QFileInfo f(normalized(file));
 	QString dir = defaultDir.isEmpty() ? f.absolutePath() : defaultDir;
 	QString fileName = QDir::toNativeSeparators(dir + QDir::separator() + f.completeBaseName() + extension);
@@ -61,8 +65,7 @@ QString FileDialog::createNewFileName(const QString &file, const QString &extens
 	if(!QFile::exists(fileName))
 		return fileName;
 #endif
-	QString capitalized = type[0].toUpper() + type.mid(1);
-	fileName = FileDialog::getSaveFileName(parent, Application::tr("Create %1").arg(type), fileName,
+	fileName = FileDialog::getSaveFileName(parent, tr("Create %1").arg(type), fileName,
 		QStringLiteral("%1 (*%2)").arg(capitalized, extension));
 	if(!fileName.isEmpty())
 		QFile::remove(fileName);
@@ -164,13 +167,13 @@ void FileDialog::setFileZone(const QString &path, int zone)
 QString FileDialog::getDir( const QString &dir )
 {
 #ifdef Q_OS_OSX
-	Q_UNUSED(dir);
+	Q_UNUSED(dir)
 	QString path = QSettings().value(QStringLiteral("NSNavLastRootDirectory")).toString();
 	path.replace('~', QDir::homePath());
 	return path;
 #else
-	return !dir.isEmpty() ? dir : QSettings().value("lastPath",
-		QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation)).toString();
+	return !dir.isEmpty() ? dir : Settings::LAST_PATH.value(
+		QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation));
 #endif
 }
 
@@ -302,9 +305,9 @@ QString FileDialog::result( const QString &str )
 {
 #ifndef Q_OS_OSX
 	if(!str.isEmpty())
-		QSettings().setValue("lastPath", QFileInfo(str).absolutePath());
+		Settings::LAST_PATH = QFileInfo(str).absolutePath();
 #else
-	QSettings().remove(QStringLiteral("lastPath"));
+	Settings::LAST_PATH.clear();
 #endif
 	return str;
 }
@@ -313,7 +316,7 @@ QStringList FileDialog::result( const QStringList &list )
 {
 	QStringList l;
 	for( const QString &str: list )
-		l << result( str );
+		l.append(result(str));
 	return l;
 }
 
diff --git a/client/dialogs/FileDialog.h b/client/dialogs/FileDialog.h
index 1a86aba5d..f6da2a86b 100644
--- a/client/dialogs/FileDialog.h
+++ b/client/dialogs/FileDialog.h
@@ -33,8 +33,7 @@ class FileDialog : public QFileDialog
 
 	using QFileDialog::QFileDialog;
 
-	static QString createNewFileName(const QString &file, const QString &extension,
-		const QString &type, const QString &defaultDir, QWidget *parent);
+	static QString createNewFileName(const QString &file, bool signature, QWidget *parent);
 	static FileType detect(const QString &filename);
 	static bool fileIsWritable( const QString &filename );
 	static QString fileSize( quint64 bytes );
diff --git a/client/dialogs/MobileDialog.cpp b/client/dialogs/MobileDialog.cpp
index e9c39d99b..9665bf096 100644
--- a/client/dialogs/MobileDialog.cpp
+++ b/client/dialogs/MobileDialog.cpp
@@ -21,19 +21,15 @@
 #include "ui_MobileDialog.h"
 
 #include "IKValidator.h"
+#include "Settings.h"
 #include "Styles.h"
-#include "dialogs/SettingsDialog.h"
 #include "effects/Overlay.h"
 
-#include <QtCore/QSettings>
-
-#define COUNTRY_CODE_EST QStringLiteral("372")
-#define COUNTRY_CODE_LTU QStringLiteral("370")
-
 MobileDialog::MobileDialog(QWidget *parent) :
 	QDialog(parent),
 	ui(new Ui::MobileDialog)
 {
+	static const QStringList countryCodes {QStringLiteral("372"), QStringLiteral("370")};
 	new Overlay(this, parent);
 	ui->setupUi(this);
 	setWindowFlags(Qt::Dialog | Qt::FramelessWindowHint);
@@ -57,18 +53,18 @@ MobileDialog::MobileDialog(QWidget *parent) :
 
 	// Mobile
 	ui->idCode->setValidator(new NumberValidator(ui->idCode));
-	ui->idCode->setText(QSettings().value(QStringLiteral("MobileCode")).toString());
+	ui->idCode->setText(Settings::MOBILEID_CODE);
 	ui->idCode->setAttribute(Qt::WA_MacShowFocusRect, false);
 	ui->phoneNo->setValidator(new NumberValidator(ui->phoneNo));
-	ui->phoneNo->setText(QSettings().value(QStringLiteral("MobileNumber"), COUNTRY_CODE_EST).toString());
+	ui->phoneNo->setText(Settings::MOBILEID_NUMBER.value(countryCodes[0]));
 	ui->phoneNo->setAttribute(Qt::WA_MacShowFocusRect, false);
-	ui->cbRemember->setChecked(QSettings().value(QStringLiteral("MobileSettings"), true).toBool());
+	ui->cbRemember->setChecked(Settings::MOBILEID_REMEMBER);
 	ui->cbRemember->setAttribute(Qt::WA_MacShowFocusRect, false);
 	auto saveSettings = [this] {
 		bool checked = ui->cbRemember->isChecked();
-		SettingsDialog::setValueEx(QStringLiteral("MobileSettings"), checked, true);
-		SettingsDialog::setValueEx(QStringLiteral("MobileCode"), checked ? ui->idCode->text() : QString());
-		SettingsDialog::setValueEx(QStringLiteral("MobileNumber"), checked ? ui->phoneNo->text() : QString());
+		Settings::MOBILEID_REMEMBER = checked;
+		Settings::MOBILEID_CODE = checked ? ui->idCode->text() : QString();
+		Settings::MOBILEID_NUMBER = checked ? ui->phoneNo->text() : QString();
 	};
 	connect(ui->idCode, &QLineEdit::returnPressed, ui->sign, &QPushButton::click);
 	connect(ui->idCode, &QLineEdit::textEdited, this, saveSettings);
@@ -76,7 +72,6 @@ MobileDialog::MobileDialog(QWidget *parent) :
 	connect(ui->phoneNo, &QLineEdit::textEdited, this, saveSettings);
 	connect(ui->cbRemember, &QCheckBox::clicked, this, saveSettings);
 	connect(ui->sign, &QPushButton::clicked, this, [this] {
-		static const QStringList countryCodes {COUNTRY_CODE_EST, COUNTRY_CODE_LTU};
 		if(!IKValidator::isValid(idCode()))
 		{
 			ui->idCode->setStyleSheet(QStringLiteral("border-color: #c53e3e"));
diff --git a/client/dialogs/MobileProgress.cpp b/client/dialogs/MobileProgress.cpp
index bb83e3ed3..283317431 100644
--- a/client/dialogs/MobileProgress.cpp
+++ b/client/dialogs/MobileProgress.cpp
@@ -21,12 +21,12 @@
 #include "ui_MobileProgress.h"
 
 #include "Application.h"
+#include "Settings.h"
 #include "Styles.h"
 #include "Utils.h"
 #include "dialogs/WarningDialog.h"
 
 #include <common/Common.h>
-#include <common/Configuration.h>
 
 #include <digidocpp/crypto/X509Cert.h>
 
@@ -37,7 +37,6 @@
 #include <QtCore/QLoggingCategory>
 #include <QtCore/QTimeLine>
 #include <QtCore/QUuid>
-#include <QtCore/QSettings>
 #include <QtNetwork/QNetworkAccessManager>
 #include <QtNetwork/QNetworkRequest>
 #include <QtNetwork/QNetworkReply>
@@ -54,28 +53,21 @@ class MobileProgress::Private final: public QDialog, public Ui::MobileProgress
 {
 	Q_OBJECT
 public:
-	QString URL() { return !UUID.isNull() && useCustomUUID ? SKURL : PROXYURL; }
 	using QDialog::QDialog;
 	void reject() final { l.exit(QDialog::Rejected); }
-	QTimeLine *statusTimer = nullptr;
-	QNetworkAccessManager *manager = nullptr;
+	QTimeLine *statusTimer {};
+	QNetworkAccessManager *manager {};
 	QNetworkRequest req;
 	QString ssid, cell, sessionID;
 	std::vector<unsigned char> signature;
 	X509Cert cert;
 	QEventLoop l;
-#ifdef CONFIG_URL
-	QString PROXYURL = qApp->conf()->object().value(QStringLiteral("MID-PROXY-URL")).toString(QStringLiteral(MOBILEID_URL));
-	QString SKURL = qApp->conf()->object().value(QStringLiteral("MID-SK-URL")).toString(QStringLiteral(MOBILEID_URL));
-#else
-	QString PROXYURL = QSettings().value(QStringLiteral("MID-PROXY-URL"), QStringLiteral(MOBILEID_URL)).toString();
-	QString SKURL = QSettings().value(QStringLiteral("MID-SK-URL"), QStringLiteral(MOBILEID_URL)).toString();
-#endif
-	QString NAME = QSettings().value(QStringLiteral("MIDNAME"), QStringLiteral("RIA DigiDoc")).toString();
-	bool useCustomUUID = QSettings().value(QStringLiteral("MIDUUID-CUSTOM"), QSettings().contains(QStringLiteral("MIDUUID"))).toBool();
-	QString UUID = useCustomUUID ? QSettings().value(QStringLiteral("MIDUUID")).toString() : QString();
+	bool useCustomUUID = Settings::MID_UUID_CUSTOM;
+	QString NAME = Settings::MID_NAME;
+	QString UUID = useCustomUUID ? Settings::MID_UUID : QString();
+	QString URL = !UUID.isNull() && useCustomUUID ? Settings::MID_SK_URL : Settings::MID_PROXY_URL;
 #ifdef QT_WIN_EXTRAS
-	QWinTaskbarButton *taskbar = nullptr;
+	QWinTaskbarButton *taskbar {};
 #endif
 };
 
@@ -127,7 +119,7 @@ background-color: #007aff;
 	QList<QSslCertificate> trusted;
 #ifdef CONFIG_URL
 	ssl.setCaCertificates({});
-	for(const QJsonValue cert: qApp->conf()->object().value(QStringLiteral("CERT-BUNDLE")).toArray())
+	for(const auto cert: qApp->confValue(QLatin1String("CERT-BUNDLE")).toArray())
 		trusted << QSslCertificate(QByteArray::fromBase64(cert.toString().toLatin1()), QSsl::Der);
 #endif
 	d->req.setSslConfiguration(ssl);
@@ -162,7 +154,7 @@ background-color: #007aff;
 			qCWarning(MIDLog) << err;
 			stop();
 			d->hide();
-			WarningDialog *dlg = WarningDialog::show(d->parentWidget(), err, details);
+			auto *dlg = WarningDialog::show(d->parentWidget(), err, details);
 			QObject::connect(dlg, &WarningDialog::finished, &d->l, &QEventLoop::exit);
 		};
 
@@ -263,7 +255,7 @@ background-color: #007aff;
 				returnError(tr("Service result:") + endResult);
 			return;
 		}
-		d->req.setUrl(QUrl(QStringLiteral("%1/signature/session/%2?timeoutMs=10000").arg(d->URL(), d->sessionID)));
+		d->req.setUrl(QUrl(QStringLiteral("%1/signature/session/%2?timeoutMs=10000").arg(d->URL, d->sessionID)));
 		qCDebug(MIDLog).noquote() << d->req.url();
 		d->manager->get(d->req);
 	});
@@ -283,7 +275,7 @@ bool MobileProgress::init(const QString &ssid, const QString &cell)
 {
 	if(!d->UUID.isEmpty() && QUuid(d->UUID).isNull())
 	{
-		WarningDialog(tr("Failed to send request. Check your %1 service access settings.").arg(tr("mobile-ID")), {}, d->parentWidget()).exec();
+		WarningDialog::show(d->parentWidget(), tr("Failed to send request. Check your %1 service access settings.").arg(tr("mobile-ID")));
 		return false;
 	}
 	d->ssid = ssid;
@@ -297,7 +289,7 @@ bool MobileProgress::init(const QString &ssid, const QString &cell)
 		{"nationalIdentityNumber", d->ssid},
 		{"phoneNumber", d->cell},
 	})).toJson();
-	d->req.setUrl(QUrl(QStringLiteral("%1/certificate").arg(d->URL())));
+	d->req.setUrl(QUrl(QStringLiteral("%1/certificate").arg(d->URL)));
 	qCDebug(MIDLog).noquote() << d->req.url() << data;
 	d->manager->post(d->req, data);
 	return d->l.exec() == QDialog::Accepted;
@@ -339,7 +331,7 @@ std::vector<unsigned char> MobileProgress::sign(const std::string &method, const
 	})).toJson();
 	// Workaround MID proxy issues
 	data = QString::fromUtf8(data).arg(escapeUnicode(tr("Sign document"))).toUtf8();
-	d->req.setUrl(QUrl(QStringLiteral("%1/signature").arg(d->URL())));
+	d->req.setUrl(QUrl(QStringLiteral("%1/signature").arg(d->URL)));
 	qCDebug(MIDLog).noquote() << d->req.url() << data;
 	d->manager->post(d->req, data);
 	d->statusTimer->start();
diff --git a/client/dialogs/RoleAddressDialog.cpp b/client/dialogs/RoleAddressDialog.cpp
index 0edc1ba43..22ef7afc1 100644
--- a/client/dialogs/RoleAddressDialog.cpp
+++ b/client/dialogs/RoleAddressDialog.cpp
@@ -20,21 +20,15 @@
 #include "RoleAddressDialog.h"
 #include "ui_RoleAddressDialog.h"
 
+#include "Settings.h"
 #include "Styles.h"
-#include "dialogs/SettingsDialog.h"
 #include "effects/Overlay.h"
 
-#include <QtCore/QSettings>
-
 #include <QtWidgets/QCompleter>
-#include <QListView>
+#include <QtWidgets/QListView>
 #include <QtWidgets/QPushButton>
 
-class RoleAddressDialog::Private: public Ui::RoleAddressDialog
-{
-public:
-	QSettings s;
-};
+class RoleAddressDialog::Private: public Ui::RoleAddressDialog {};
 
 RoleAddressDialog::RoleAddressDialog(QWidget *parent)
 	: QDialog(parent)
@@ -68,21 +62,22 @@ RoleAddressDialog::RoleAddressDialog(QWidget *parent)
 
 	for(QLineEdit *line: findChildren<QLineEdit*>())
 	{
-		QCompleter *completer = new QCompleter(d->s.value(line->objectName()).toStringList(), line);
+		Settings::Option<QStringList> s{line->objectName()};
+		QCompleter *completer = new QCompleter(s, line);
 		completer->setMaxVisibleItems(10);
 		completer->setCompletionMode(QCompleter::PopupCompletion);
 		completer->setCaseSensitivity(Qt::CaseInsensitive);
-		line->setText(d->s.value(line->objectName()).toStringList().value(0));
+		line->setText(QStringList(s).value(0));
 		line->setFont(regularFont);
 		line->setCompleter(completer);
 		connect(line, &QLineEdit::editingFinished, this, [=] {
-			QStringList list = d->s.value(line->objectName()).toStringList();
+			QStringList list = s;
 			list.removeAll(line->text());
 			list.insert(0, line->text());
 			if(list.size() > 10)
 				list.removeLast();
-			d->s.setValue(line->objectName(), QString()); // Uses on Windows MULTI_STRING registry
-			SettingsDialog::setValueEx(line->objectName(), list);
+			s.clear(); // Uses on Windows MULTI_STRING registry
+			s = list;
 		});
 		completer->popup()->setStyleSheet("background-color:#FFFFFF; color: #000000;");
 	}
@@ -95,7 +90,7 @@ RoleAddressDialog::~RoleAddressDialog()
 
 int RoleAddressDialog::get(QString &city, QString &country, QString &state, QString &zip, QString &role)
 {
-	if(!QSettings().value(QStringLiteral("RoleAddressInfo"), false).toBool())
+	if(!Settings::SHOW_ROLE_ADDRESS_INFO)
 		return QDialog::Accepted;
 	new Overlay(this, parentWidget());
 	int result = QDialog::exec();
diff --git a/client/dialogs/SettingsDialog.cpp b/client/dialogs/SettingsDialog.cpp
index 1453f880c..676beb54c 100644
--- a/client/dialogs/SettingsDialog.cpp
+++ b/client/dialogs/SettingsDialog.cpp
@@ -30,6 +30,7 @@
 #include "Diagnostics.h"
 #include "FileDialog.h"
 #include "QSigner.h"
+#include "Settings.h"
 #include "Styles.h"
 #include "SslCertificate.h"
 #include "TokenData.h"
@@ -45,7 +46,6 @@
 
 #include <QtCore/QJsonObject>
 #include <QtCore/QProcess>
-#include <QtCore/QSettings>
 #include <QtCore/QStandardPaths>
 #include <QtCore/QThreadPool>
 #include <QtGui/QDesktopServices>
@@ -340,8 +340,6 @@ void SettingsDialog::retranslate(const QString& lang)
 
 void SettingsDialog::initFunctionality()
 {
-	QSettings s;
-
 	// pageGeneral
 	selectLanguage();
 	connect(ui->langGroup, qOverload<QAbstractButton*>(&QButtonGroup::buttonClicked), this,
@@ -351,14 +349,14 @@ void SettingsDialog::initFunctionality()
 	connect(ui->chkGeneralTslRefresh, &QCheckBox::toggled, [](bool checked) {
 		qApp->setConfValue(Application::TSLOnlineDigest, checked);
 	});
-	ui->chkShowPrintSummary->setChecked(s.value(QStringLiteral("ShowPrintSummary"), false).toBool());
+	ui->chkShowPrintSummary->setChecked(Settings::SHOW_PRINT_SUMMARY);
 	connect(ui->chkShowPrintSummary, &QCheckBox::toggled, this, &SettingsDialog::togglePrinting);
 	connect(ui->chkShowPrintSummary, &QCheckBox::toggled, this, [](bool checked) {
-		setValueEx(QStringLiteral("ShowPrintSummary"), checked, false);
+		Settings::SHOW_PRINT_SUMMARY = checked;
 	});
-	ui->chkRoleAddressInfo->setChecked(s.value(QStringLiteral("RoleAddressInfo"), false).toBool());
+	ui->chkRoleAddressInfo->setChecked(Settings::SHOW_ROLE_ADDRESS_INFO);
 	connect(ui->chkRoleAddressInfo, &QCheckBox::toggled, this, [](bool checked) {
-		setValueEx(QStringLiteral("RoleAddressInfo"), checked, false);
+		Settings::SHOW_ROLE_ADDRESS_INFO = checked;
 	});
 
 #ifdef Q_OS_MAC
@@ -369,12 +367,11 @@ void SettingsDialog::initFunctionality()
 	ui->rdGeneralSpecifyDirectory->hide();
 #else
 	connect(ui->btGeneralChooseDirectory, &QPushButton::clicked, this, [=]{
-		QString dir = FileDialog::getExistingDirectory(this, tr("Select folder"),
-			QSettings().value(QStringLiteral("DefaultDir")).toString());
+		QString dir = FileDialog::getExistingDirectory(this, tr("Select folder"), Settings::DEFAULT_DIR);
 		if(!dir.isEmpty())
 		{
 			ui->rdGeneralSpecifyDirectory->setChecked(true);
-			setValueEx(QStringLiteral("DefaultDir"), dir);
+			Settings::DEFAULT_DIR = dir;
 			ui->txtGeneralDirectory->setText(dir);
 		}
 	});
@@ -384,11 +381,11 @@ void SettingsDialog::initFunctionality()
 		if(!enable)
 			ui->txtGeneralDirectory->clear();
 	});
-	ui->txtGeneralDirectory->setText(s.value(QStringLiteral("DefaultDir")).toString());
+	ui->txtGeneralDirectory->setText(Settings::DEFAULT_DIR);
 	if(ui->txtGeneralDirectory->text().isEmpty())
 		ui->rdGeneralSameDirectory->setChecked(true);
 	connect(ui->txtGeneralDirectory, &QLineEdit::textChanged, this, [](const QString &text) {
-		setValueEx(QStringLiteral("DefaultDir"), text);
+		Settings::DEFAULT_DIR = text;
 	});
 #endif
 
@@ -398,14 +395,14 @@ void SettingsDialog::initFunctionality()
 	connect( ui->rdProxyNone, &QRadioButton::toggled, this, &SettingsDialog::setProxyEnabled );
 	connect( ui->rdProxySystem, &QRadioButton::toggled, this, &SettingsDialog::setProxyEnabled );
 	connect( ui->rdProxyManual, &QRadioButton::toggled, this, &SettingsDialog::setProxyEnabled );
-	switch(s.value(QStringLiteral("ProxyConfig"), 0).toInt())
+	switch(Settings::PROXY_CONFIG)
 	{
-	case 1: ui->rdProxySystem->setChecked(true); break;
-	case 2: ui->rdProxyManual->setChecked(true); break;
+	case Settings::ProxySystem: ui->rdProxySystem->setChecked(true); break;
+	case Settings::ProxyManual: ui->rdProxyManual->setChecked(true); break;
 	default: ui->rdProxyNone->setChecked(true); break;
 	}
 
-	ui->chkProxyEnableForSSL->setDisabled((s.value(QStringLiteral("ProxyConfig"), 0).toInt() != 2));
+	ui->chkProxyEnableForSSL->setDisabled(Settings::PROXY_CONFIG != Settings::ProxyManual);
 	updateProxy();
 
 	// pageServices - Access Cert
@@ -426,20 +423,18 @@ void SettingsDialog::initFunctionality()
 	connect(ui->rdTimeStampCustom, &QRadioButton::toggled, ui->txtTimeStamp, [this](bool checked) {
 		ui->txtTimeStamp->setEnabled(checked);
 		ui->wgtTSACert->setVisible(checked);
-		setValueEx(QStringLiteral("TSA-URL-CUSTOM"), checked, QSettings().contains(QStringLiteral("TSA-URL")));
+		Settings::TSA_URL_CUSTOM = checked;
 	});
-	ui->rdTimeStampCustom->setChecked(s.value(QStringLiteral("TSA-URL-CUSTOM"), s.contains(QStringLiteral("TSA-URL"))).toBool());
+	ui->rdTimeStampCustom->setChecked(Settings::TSA_URL_CUSTOM);
 	ui->wgtTSACert->setVisible(ui->rdTimeStampCustom->isChecked());
-#ifdef CONFIG_URL
-	ui->txtTimeStamp->setPlaceholderText(qApp->conf()->object().value(QStringLiteral("TSA-URL")).toString());
-#endif
-	QString TSA_URL = s.value(QStringLiteral("TSA-URL"), qApp->confValue(Application::TSAUrl)).toString();
+	ui->txtTimeStamp->setPlaceholderText(qApp->confValue(Settings::TSA_URL.KEY).toString());
+	QString TSA_URL = Settings::TSA_URL.value(qApp->confValue(Application::TSAUrl));
 	ui->txtTimeStamp->setText(ui->txtTimeStamp->placeholderText() == TSA_URL ? QString() : TSA_URL);
 	connect(ui->txtTimeStamp, &QLineEdit::textChanged, this, [this](const QString &url) {
 		qApp->setConfValue(Application::TSAUrl, url);
 		if(url.isEmpty())
 		{
-			QSettings().remove(QStringLiteral("TSA-CERT"));
+			Settings::TSA_CERT.clear();
 			updateTSACert(QSslCertificate());
 		}
 	});
@@ -451,22 +446,22 @@ void SettingsDialog::initFunctionality()
 			QStringLiteral("%1 (*.crt *.cer *.pem)").arg(tr("Time-Stamping service SSL certificate")));
 		if(cert.isNull())
 			return;
-		QSettings().setValue(QStringLiteral("TSA-CERT"), cert.toDer().toBase64());
+		Settings::TSA_CERT = cert.toDer().toBase64();
 		updateTSACert(cert);
 	});
-	updateTSACert(QSslCertificate(QByteArray::fromBase64(s.value(QStringLiteral("TSA-CERT")).toByteArray()), QSsl::Der));
+	updateTSACert(QSslCertificate(QByteArray::fromBase64(Settings::TSA_CERT), QSsl::Der));
 
 	// pageServices - MID
 	connect(ui->rdMIDUUIDCustom, &QRadioButton::toggled, ui->txtMIDUUID, [=](bool checked) {
 		ui->txtMIDUUID->setEnabled(checked);
-		setValueEx(QStringLiteral("MIDUUID-CUSTOM"), checked, QSettings().contains(QStringLiteral("MIDUUID")));
-		setValueEx(QStringLiteral("SIDUUID-CUSTOM"), checked, QSettings().contains(QStringLiteral("SIDUUID")));
+		Settings::MID_UUID_CUSTOM = checked;
+		Settings::SID_UUID_CUSTOM = checked;
 	});
-	ui->rdMIDUUIDCustom->setChecked(s.value(QStringLiteral("MIDUUID-CUSTOM"), s.contains(QStringLiteral("MIDUUID"))).toBool());
-	ui->txtMIDUUID->setText(s.value(QStringLiteral("MIDUUID")).toString());
+	ui->rdMIDUUIDCustom->setChecked(Settings::MID_UUID_CUSTOM);
+	ui->txtMIDUUID->setText(Settings::MID_UUID);
 	connect(ui->txtMIDUUID, &QLineEdit::textChanged, this, [](const QString &text) {
-		setValueEx(QStringLiteral("MIDUUID"), text);
-		setValueEx(QStringLiteral("SIDUUID"), text);
+		Settings::MID_UUID = text;
+		Settings::SID_UUID = text;
 	});
 	connect(ui->helpMID, &QToolButton::clicked, this, []{
 		QDesktopServices::openUrl(tr("https://www.id.ee/en/article/for-organisations-that-sign-large-quantities-of-documents-using-digidoc4-client/"));
@@ -476,20 +471,18 @@ void SettingsDialog::initFunctionality()
 	connect(ui->rdSiVaCustom, &QRadioButton::toggled, ui->txtSiVa, [this](bool checked) {
 		ui->txtSiVa->setEnabled(checked);
 		ui->wgtSiVaCert->setVisible(checked);
-		setValueEx(QStringLiteral("SIVA-URL-CUSTOM"), checked, QSettings().contains(QStringLiteral("SIVA-URL")));
+		Settings::SIVA_URL_CUSTOM = checked;
 	});
-	ui->rdSiVaCustom->setChecked(s.value(QStringLiteral("SIVA-URL-CUSTOM"), s.contains(QStringLiteral("SIVA-URL"))).toBool());
+	ui->rdSiVaCustom->setChecked(Settings::SIVA_URL_CUSTOM);
 	ui->wgtSiVaCert->setVisible(ui->rdSiVaCustom->isChecked());
-#ifdef CONFIG_URL
-	ui->txtSiVa->setPlaceholderText(qApp->conf()->object().value(QStringLiteral("SIVA-URL")).toString());
-#endif
-	QString SIVA_URL = s.value(QStringLiteral("SIVA-URL"), qApp->confValue(Application::SiVaUrl)).toString();
+	ui->txtSiVa->setPlaceholderText(qApp->confValue(Settings::SIVA_URL.KEY).toString());
+	QString SIVA_URL = Settings::SIVA_URL.value(qApp->confValue(Application::SiVaUrl));
 	ui->txtSiVa->setText(ui->txtSiVa->placeholderText() == SIVA_URL ? QString() : SIVA_URL);
 	connect(ui->txtSiVa, &QLineEdit::textChanged, this, [this](const QString &url) {
 		qApp->setConfValue(Application::SiVaUrl, url);
 		if(url.isEmpty())
 		{
-			QSettings().remove(QStringLiteral("SIVA-CERT"));
+			Settings::SIVA_CERT.clear();
 			updateSiVaCert(QSslCertificate());
 		}
 	});
@@ -501,15 +494,15 @@ void SettingsDialog::initFunctionality()
 			QStringLiteral("%1 (*.crt *.cer *.pem)").arg(tr("Digital Signature Validation Service SiVa SSL certificate")));
 		if(cert.isNull())
 			return;
-		QSettings().setValue(QStringLiteral("SIVA-CERT"), cert.toDer().toBase64());
+		Settings::SIVA_CERT = cert.toDer().toBase64();
 		updateSiVaCert(cert);
 	});
-	updateSiVaCert(QSslCertificate(QByteArray::fromBase64(s.value(QStringLiteral("SIVA-CERT")).toByteArray()), QSsl::Der));
+	updateSiVaCert(QSslCertificate(QByteArray::fromBase64(Settings::SIVA_CERT), QSsl::Der));
 
 	// pageDiagnostics
-	ui->chkLibdigidocppDebug->setChecked(s.value(QStringLiteral("LibdigidocppDebug"), false).toBool());
+	ui->chkLibdigidocppDebug->setChecked(Settings::LIBDIGIDOCPP_DEBUG);
 	connect(ui->chkLibdigidocppDebug, &QCheckBox::toggled, this, [this](bool checked) {
-		setValueEx(QStringLiteral("LibdigidocppDebug"), checked, false);
+		Settings::LIBDIGIDOCPP_DEBUG = checked;
 		if(!checked)
 		{
 			QFile::remove(qdigidoc4log);
@@ -613,11 +606,11 @@ void SettingsDialog::updateVersion()
 void SettingsDialog::saveProxy()
 {
 	if(ui->rdProxyNone->isChecked())
-		setValueEx(QStringLiteral("ProxyConfig"), 0, 0);
+		Settings::PROXY_CONFIG = Settings::ProxyNone;
 	else if(ui->rdProxySystem->isChecked())
-		setValueEx(QStringLiteral("ProxyConfig"), 1, 0);
+		Settings::PROXY_CONFIG = Settings::ProxySystem;
 	else if(ui->rdProxyManual->isChecked())
-		setValueEx(QStringLiteral("ProxyConfig"), 2, 0);
+		Settings::PROXY_CONFIG = Settings::ProxyManual;
 	Application::setConfValue( Application::ProxyHost, ui->txtProxyHost->text() );
 	Application::setConfValue( Application::ProxyPort, ui->txtProxyPort->text() );
 	Application::setConfValue( Application::ProxyUser, ui->txtProxyUsername->text() );
@@ -627,24 +620,15 @@ void SettingsDialog::saveProxy()
 	updateProxy();
 }
 
-void SettingsDialog::setValueEx(const QString &key, const QVariant &value, const QVariant &def)
-{
-	bool valueIsNull = value.type() == QVariant::String ? value.toString().isEmpty() : value.isNull();
-	if(value == def || (def.isNull() && valueIsNull))
-		QSettings().remove(key);
-	else
-		QSettings().setValue(key, value);
-}
-
 void SettingsDialog::loadProxy( const digidoc::Conf *conf )
 {
-	switch(QSettings().value(QStringLiteral("ProxyConfig"), 0).toUInt())
+	switch(Settings::PROXY_CONFIG)
 	{
-	case 0:
+	case Settings::ProxyNone:
 		QNetworkProxyFactory::setUseSystemConfiguration(false);
 		QNetworkProxy::setApplicationProxy({});
 		break;
-	case 1:
+	case Settings::ProxySystem:
 		QNetworkProxyFactory::setUseSystemConfiguration(true);
 		break;
 	default:
diff --git a/client/dialogs/SettingsDialog.h b/client/dialogs/SettingsDialog.h
index 0649a60f3..d84131f1c 100644
--- a/client/dialogs/SettingsDialog.h
+++ b/client/dialogs/SettingsDialog.h
@@ -57,7 +57,6 @@ class SettingsDialog final: public QDialog
 	void showPage(int page);
 	static QString certInfo(const SslCertificate &c);
 	static void loadProxy( const digidoc::Conf *conf );
-	static void setValueEx(const QString &key, const QVariant &value, const QVariant &def = {});
 
 signals:
 	void langChanged(const QString& lang);
diff --git a/client/dialogs/SmartIDDialog.cpp b/client/dialogs/SmartIDDialog.cpp
index 7f93714e1..9b155f280 100644
--- a/client/dialogs/SmartIDDialog.cpp
+++ b/client/dialogs/SmartIDDialog.cpp
@@ -21,17 +21,15 @@
 #include "ui_SmartIDDialog.h"
 
 #include "IKValidator.h"
+#include "Settings.h"
 #include "Styles.h"
-#include "dialogs/SettingsDialog.h"
 #include "effects/Overlay.h"
 
-#include <QtCore/QSettings>
-
 SmartIDDialog::SmartIDDialog(QWidget *parent)
 	: QDialog(parent)
 	, ui(new Ui::SmartIDDialog)
 {
-	static QString EE = QStringLiteral("EE");
+	static const QString &EE = Settings::SMARTID_COUNTRY_LIST[0];
 	new Overlay(this, parent);
 
 	ui->setupUi(this);
@@ -56,20 +54,18 @@ SmartIDDialog::SmartIDDialog(QWidget *parent)
 	ui->sign->setFont(condensed);
 	ui->cancel->setFont(condensed);
 
-	QSettings s;
 	QValidator *ik = new NumberValidator(ui->idCode);
 	ui->idCode->setValidator(ik);
-	ui->idCode->setText(s.value(QStringLiteral("SmartID")).toString());
-	ui->idCountry->setItemData(0, "EE");
-	ui->idCountry->setItemData(1, "LT");
-	ui->idCountry->setItemData(2, "LV");
-	ui->idCountry->setCurrentIndex(ui->idCountry->findData(s.value(QStringLiteral("SmartIDCountry"), QStringLiteral("EE")).toString()));
-	ui->cbRemember->setChecked(s.value(QStringLiteral("SmartIDSettings"), true).toBool());
+	ui->idCode->setText(Settings::SMARTID_CODE);
+	for(int i = 0, count = Settings::SMARTID_COUNTRY_LIST.size(); i < count; ++i)
+		ui->idCountry->setItemData(i, Settings::SMARTID_COUNTRY_LIST[i]);
+	ui->idCountry->setCurrentIndex(ui->idCountry->findData(Settings::SMARTID_COUNTRY));
+	ui->cbRemember->setChecked(Settings::SMARTID_REMEMBER);
 	auto saveSettings = [this]{
 		bool checked = ui->cbRemember->isChecked();
-		SettingsDialog::setValueEx(QStringLiteral("SmartIDSettings"), checked, true);
-		SettingsDialog::setValueEx(QStringLiteral("SmartID"), checked ? idCode() : QString());
-		SettingsDialog::setValueEx(QStringLiteral("SmartIDCountry"), checked ? country() : EE, EE);
+		Settings::SMARTID_REMEMBER = checked;
+		Settings::SMARTID_CODE = checked ? idCode() : QString();
+		Settings::SMARTID_COUNTRY = checked ? country() : EE;
 	};
 	connect(ui->idCode, &QLineEdit::returnPressed, ui->sign, &QPushButton::click);
 	connect(ui->idCode, &QLineEdit::textEdited, this, saveSettings);
diff --git a/client/dialogs/SmartIDProgress.cpp b/client/dialogs/SmartIDProgress.cpp
index e94a175e2..2f516e7cd 100644
--- a/client/dialogs/SmartIDProgress.cpp
+++ b/client/dialogs/SmartIDProgress.cpp
@@ -21,12 +21,12 @@
 #include "ui_MobileProgress.h"
 
 #include "Application.h"
+#include "Settings.h"
 #include "Styles.h"
 #include "Utils.h"
 #include "dialogs/WarningDialog.h"
 
 #include <common/Common.h>
-#include <common/Configuration.h>
 
 #include <digidocpp/crypto/X509Cert.h>
 
@@ -38,7 +38,6 @@
 #include <QtCore/QLoggingCategory>
 #include <QtCore/QTimeLine>
 #include <QtCore/QUuid>
-#include <QtCore/QSettings>
 #include <QtNetwork/QNetworkAccessManager>
 #include <QtNetwork/QNetworkRequest>
 #include <QtNetwork/QNetworkReply>
@@ -55,7 +54,6 @@ class SmartIDProgress::Private final: public QDialog, public Ui::MobileProgress
 {
 	Q_OBJECT
 public:
-	QString URL() { return !UUID.isNull() && useCustomUUID ? SKURL : PROXYURL; }
 	using QDialog::QDialog;
 	void reject() final { l.exit(QDialog::Rejected); }
 	void setVisible(bool visible) final {
@@ -63,26 +61,19 @@ class SmartIDProgress::Private final: public QDialog, public Ui::MobileProgress
 		QDialog::setVisible(visible);
 		if(!visible && hider) hider.reset();
 	}
-	QTimeLine *statusTimer = nullptr;
-	QNetworkAccessManager *manager = nullptr;
+	QTimeLine *statusTimer {};
+	QNetworkAccessManager *manager {};
 	QNetworkRequest req;
 	QString documentNumber, sessionID, fileName;
 	X509Cert cert;
 	std::vector<unsigned char> signature;
 	QEventLoop l;
-#ifdef CONFIG_URL
-	QJsonObject config = qApp->conf()->object();
-	QString PROXYURL = config.value(QLatin1String("SIDV2-PROXY-URL")).toString(config.value(QLatin1String("SID-PROXY-URL")).toString(QStringLiteral(SMARTID_URL)));
-	QString SKURL = config.value(QLatin1String("SIDV2-SK-URL")).toString(config.value(QLatin1String("SID-SK-URL")).toString(QStringLiteral(SMARTID_URL)));
-#else
-	QString PROXYURL = QSettings().value(QStringLiteral("SID-PROXY-URL"), QStringLiteral(SMARTID_URL)).toString();
-	QString SKURL = QSettings().value(QStringLiteral("SID-SK-URL"), QStringLiteral(SMARTID_URL)).toString();
-#endif
-	QString NAME = QSettings().value(QStringLiteral("SIDNAME"), QStringLiteral("RIA DigiDoc")).toString();
-	bool useCustomUUID = QSettings().value(QStringLiteral("SIDUUID-CUSTOM"), QSettings().contains(QStringLiteral("SIDUUID"))).toBool();
-	QString UUID = useCustomUUID ? QSettings().value(QStringLiteral("SIDUUID")).toString() : QString();
+	bool useCustomUUID = Settings::SID_UUID_CUSTOM;
+	QString UUID = useCustomUUID ? Settings::SID_UUID : QString();
+	QString NAME = Settings::SID_NAME;
+	QString URL = !UUID.isNull() && useCustomUUID ? Settings::SID_SK_URL : Settings::SID_PROXY_URL;
 #ifdef QT_WIN_EXTRAS
-	QWinTaskbarButton *taskbar = nullptr;
+	QWinTaskbarButton *taskbar {};
 #endif
 	std::unique_ptr<WaitDialogHider> hider;
 };
@@ -137,8 +128,8 @@ background-color: #007aff;
 	QList<QSslCertificate> trusted;
 #ifdef CONFIG_URL
 	ssl.setCaCertificates({});
-	for(const QJsonValue c: d->config.value(QLatin1String("CERT-BUNDLE")).toArray())
-		trusted << QSslCertificate(QByteArray::fromBase64(c.toString().toLatin1()), QSsl::Der);
+	for(const QJsonValue c: qApp->confValue(QLatin1String("CERT-BUNDLE")).toArray())
+		trusted.append(QSslCertificate(QByteArray::fromBase64(c.toString().toLatin1()), QSsl::Der));
 #endif
 	d->req.setSslConfiguration(ssl);
 	d->req.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");
@@ -171,7 +162,7 @@ background-color: #007aff;
 		auto returnError = [=](const QString &err, const QString &details = {}) {
 			qCWarning(SIDLog) << err;
 			d->hide();
-			WarningDialog *dlg = WarningDialog::show(d->parentWidget(), err, details);
+			auto *dlg = WarningDialog::show(d->parentWidget(), err, details);
 			QObject::connect(dlg, &WarningDialog::finished, &d->l, &QEventLoop::exit);
 		};
 
@@ -274,7 +265,7 @@ background-color: #007aff;
 		} else {
 			d->show();
 		}
-		d->req.setUrl(QUrl(QStringLiteral("%1/session/%2?timeoutMs=10000").arg(d->URL(), d->sessionID)));
+		d->req.setUrl(QUrl(QStringLiteral("%1/session/%2?timeoutMs=10000").arg(d->URL, d->sessionID)));
 		qCDebug(SIDLog).noquote() << d->req.url();
 		d->manager->get(d->req);
 	});
@@ -294,7 +285,7 @@ bool SmartIDProgress::init(const QString &country, const QString &idCode, const
 {
 	if(!d->UUID.isEmpty() && QUuid(d->UUID).isNull())
 	{
-		WarningDialog(tr("Failed to send request. Check your %1 service access settings.").arg(tr("Smart-ID")), {}, d->parentWidget()).exec();
+		WarningDialog::show(d->parentWidget(), tr("Failed to send request. Check your %1 service access settings.").arg(tr("Smart-ID")));
 		return false;
 	}
 	QFileInfo info(fileName);
@@ -311,9 +302,9 @@ bool SmartIDProgress::init(const QString &country, const QString &idCode, const
 		{"nonce", QUuid::createUuid().toString().remove('-').mid(1, 30)}
 	}).toJson();
 	if (d->req.url().path().contains(QLatin1String("v1"), Qt::CaseInsensitive)) {
-		d->req.setUrl(QUrl(QStringLiteral("%1/certificatechoice/pno/%2/%3").arg(d->URL(), country, idCode)));
+		d->req.setUrl(QUrl(QStringLiteral("%1/certificatechoice/pno/%2/%3").arg(d->URL, country, idCode)));
 	} else {
-		d->req.setUrl(QUrl(QStringLiteral("%1/certificatechoice/etsi/PNO%2-%3").arg(d->URL(), country, idCode)));
+		d->req.setUrl(QUrl(QStringLiteral("%1/certificatechoice/etsi/PNO%2-%3").arg(d->URL, country, idCode)));
 	}
 	qCDebug(SIDLog).noquote() << d->req.url() << data;
 	d->manager->post(d->req, data);
@@ -366,7 +357,7 @@ std::vector<unsigned char> SmartIDProgress::sign(const std::string &method, cons
 	}
 	// Workaround SID proxy issues
 	QByteArray data = QString::fromUtf8(QJsonDocument(req).toJson()).arg(escapeUnicode(escape)).toUtf8();
-	d->req.setUrl(QUrl(QStringLiteral("%1/signature/document/%2").arg(d->URL(), d->documentNumber)));
+	d->req.setUrl(QUrl(QStringLiteral("%1/signature/document/%2").arg(d->URL, d->documentNumber)));
 	qCDebug(SIDLog).noquote() << d->req.url() << data;
 	d->manager->post(d->req, data);
 	d->statusTimer->start();
diff --git a/client/sslConnect.cpp b/client/sslConnect.cpp
index eceabb03d..81b65e077 100644
--- a/client/sslConnect.cpp
+++ b/client/sslConnect.cpp
@@ -25,9 +25,6 @@
 #include "TokenData.h"
 #include "dialogs/WaitDialog.h"
 
-#include <common/Configuration.h>
-
-#include <QtCore/QJsonObject>
 #include <QtCore/QJsonArray>
 #include <QtNetwork/QNetworkAccessManager>
 #include <QtNetwork/QNetworkRequest>
@@ -47,8 +44,8 @@ SSLConnect::SSLConnect(QObject *parent)
 {
 #ifdef CONFIG_URL
 	d->ssl.setCaCertificates({});
-	for(const QJsonValue c: qApp->conf()->object().value(QStringLiteral("CERT-BUNDLE")).toArray())
-		d->trusted << QSslCertificate(QByteArray::fromBase64(c.toString().toLatin1()), QSsl::Der);
+	for(const auto c: qApp->confValue(QLatin1String("CERT-BUNDLE")).toArray())
+		d->trusted.append(QSslCertificate(QByteArray::fromBase64(c.toString().toLatin1()), QSsl::Der));
 #endif
 }
 
@@ -81,15 +78,11 @@ void SSLConnect::fetch()
 	d->ssl.setPrivateKey(key);
 	d->ssl.setLocalCertificate(cert);
 
-	QJsonObject obj;
-#ifdef CONFIG_URL
-	obj = qApp->conf()->object();
-#endif
 	QNetworkRequest req;
 	req.setSslConfiguration(d->ssl);
 	req.setRawHeader("User-Agent", QString(QStringLiteral("%1/%2 (%3)"))
 		.arg(qApp->applicationName(), qApp->applicationVersion(), Common::applicationOs()).toUtf8());
-	req.setUrl(obj.value(QLatin1String("PICTURE-URL")).toString(QStringLiteral("https://sisene.www.eesti.ee/idportaal/portaal.idpilt")));
+	req.setUrl(qApp->confValue(QLatin1String("PICTURE-URL")).toString(QStringLiteral("https://sisene.www.eesti.ee/idportaal/portaal.idpilt")));
 
 	QNetworkAccessManager *nam = new QNetworkAccessManager(this);
 	connect(nam, &QNetworkAccessManager::sslErrors, this, [=](QNetworkReply *reply, const QList<QSslError> &errors){
diff --git a/client/translations/en.ts b/client/translations/en.ts
index baa45b538..7f519757c 100644
--- a/client/translations/en.ts
+++ b/client/translations/en.ts
@@ -209,10 +209,6 @@
         <source>Loading TSL lists</source>
         <translation>Loading TSL lists</translation>
     </message>
-    <message>
-        <source>Create %1</source>
-        <translation>Create %1</translation>
-    </message>
     <message>
         <source>Added file(s) exceeds the maximum size limit of the container(120MB).</source>
         <translation>Added file(s) exceeds the maximum size limit of the container (~120MB).</translation>
@@ -924,6 +920,18 @@
         <source>Choose</source>
         <translation>Choose</translation>
     </message>
+    <message>
+        <source>signature container</source>
+        <translation>signature container</translation>
+    </message>
+    <message>
+        <source>crypto container</source>
+        <translation>crypto container</translation>
+    </message>
+    <message>
+        <source>Create %1</source>
+        <translation>Create %1</translation>
+    </message>
 </context>
 <context>
     <name>FileItem</name>
@@ -1490,14 +1498,6 @@ ID-CARD</translation>
         <source>Open file for encryption or decryption</source>
         <translation>... OR LOAD FILE FROM DISK</translation>
     </message>
-    <message>
-        <source>signature container</source>
-        <translation>signature container</translation>
-    </message>
-    <message>
-        <source>crypto container</source>
-        <translation>crypto container</translation>
-    </message>
     <message>
         <source>Decryption succeeded!</source>
         <translation>Decryption succeeded!</translation>
@@ -2791,7 +2791,7 @@ Additional licenses and components</translation>
     </message>
     <message>
         <source>Select Time-Stamping server certificate</source>
-        <translation type="unfinished"></translation>
+        <translation>Select Time-Stamping server certificate</translation>
     </message>
     <message>
         <source>Time-Stamping service SSL certificate</source>
diff --git a/client/translations/et.ts b/client/translations/et.ts
index d159f4f54..85b7c0d2e 100644
--- a/client/translations/et.ts
+++ b/client/translations/et.ts
@@ -209,10 +209,6 @@
         <source>Loading TSL lists</source>
         <translation>Laadin TSL-nimekirja</translation>
     </message>
-    <message>
-        <source>Create %1</source>
-        <translation>Loo %1</translation>
-    </message>
     <message>
         <source>Added file(s) exceeds the maximum size limit of the container(120MB).</source>
         <translation>Lisatud fail(id) ületab turvaümbriku maksimaalset suurust (~120MB).</translation>
@@ -924,6 +920,18 @@
         <source>Choose</source>
         <translation>Vali</translation>
     </message>
+    <message>
+        <source>signature container</source>
+        <translation>allkirjaümbrik</translation>
+    </message>
+    <message>
+        <source>crypto container</source>
+        <translation>krüptoümbrik</translation>
+    </message>
+    <message>
+        <source>Create %1</source>
+        <translation>Loo %1</translation>
+    </message>
 </context>
 <context>
     <name>FileItem</name>
@@ -1490,14 +1498,6 @@ ID-KAARDIGA</translation>
         <source>Open file for encryption or decryption</source>
         <translation>... VÕI VALI FAIL KETTALT</translation>
     </message>
-    <message>
-        <source>signature container</source>
-        <translation>allkirja ümbrik</translation>
-    </message>
-    <message>
-        <source>crypto container</source>
-        <translation>krüpto ümbrik</translation>
-    </message>
     <message>
         <source>Decryption succeeded!</source>
         <translation>Dekrüpteerimine õnnestus!</translation>
diff --git a/client/translations/ru.ts b/client/translations/ru.ts
index c1834edd5..516c92574 100644
--- a/client/translations/ru.ts
+++ b/client/translations/ru.ts
@@ -209,10 +209,6 @@
         <source>Loading TSL lists</source>
         <translation>Загружаем список TSL</translation>
     </message>
-    <message>
-        <source>Create %1</source>
-        <translation>Создайте %1</translation>
-    </message>
     <message>
         <source>Added file(s) exceeds the maximum size limit of the container(120MB).</source>
         <translation>Вложенные файл(ы) превышают размер контейнера безопасности (~120 МБ).</translation>
@@ -926,6 +922,18 @@
         <source>Choose</source>
         <translation>Выбрать</translation>
     </message>
+    <message>
+        <source>signature container</source>
+        <translation>контейнер подписи</translation>
+    </message>
+    <message>
+        <source>crypto container</source>
+        <translation>криптоконтейнер</translation>
+    </message>
+    <message>
+        <source>Create %1</source>
+        <translation>Создайте %1</translation>
+    </message>
 </context>
 <context>
     <name>FileItem</name>
@@ -1492,14 +1500,6 @@ ID-КАРТОЙ</translation>
         <source>Open file for encryption or decryption</source>
         <translation>... ИЛИ ЗАГРУЗИТЕ ФАЙЛ С ДИСКА</translation>
     </message>
-    <message>
-        <source>signature container</source>
-        <translation>контейнер подписи</translation>
-    </message>
-    <message>
-        <source>crypto container</source>
-        <translation>криптоконтейнер</translation>
-    </message>
     <message>
         <source>Decryption succeeded!</source>
         <translation>Расшифровывание прошло успешно!</translation>
diff --git a/client/widgets/ContainerPage.cpp b/client/widgets/ContainerPage.cpp
index 1a3f14db5..20e006c2b 100644
--- a/client/widgets/ContainerPage.cpp
+++ b/client/widgets/ContainerPage.cpp
@@ -22,6 +22,7 @@
 
 #include "CryptoDoc.h"
 #include "DigiDoc.h"
+#include "Settings.h"
 #include "Styles.h"
 #include "SslCertificate.h"
 #include "dialogs/AddRecipients.h"
@@ -38,8 +39,6 @@
 #include <QFontMetrics>
 #include <QMessageBox>
 
-#include <QtCore/QSettings>
-
 using namespace ria::qdigidoc4;
 
 ContainerPage::ContainerPage(QWidget *parent)
@@ -63,7 +62,7 @@ ContainerPage::ContainerPage(QWidget *parent)
 	ui->summary->init( LabelButton::BoxedDeepCerulean, tr("PRINT SUMMARY"), Actions::ContainerSummary );
 	ui->save->init( LabelButton::BoxedDeepCerulean, tr("SAVE WITHOUT SIGNING"), Actions::ContainerSave );
 
-	mobileCode = QSettings().value(QStringLiteral("MobileCode")).toString();
+	mobileCode = Settings::MOBILEID_CODE;
 
 	connect(this, &ContainerPage::moved,this, &ContainerPage::setHeader);
 	connect(ui->changeLocation, &LabelButton::clicked, this, &ContainerPage::forward);
@@ -82,7 +81,7 @@ ContainerPage::ContainerPage(QWidget *parent)
 	connect(ui->containerFile, &QLabel::linkActivated, this, [this](const QString &link)
 		{ emit action(Actions::ContainerNavigate, link); });
 
-	ui->summary->setVisible(QSettings().value(QStringLiteral("ShowPrintSummary"), false).toBool());
+	ui->summary->setVisible(Settings::SHOW_PRINT_SUMMARY);
 }
 
 ContainerPage::~ContainerPage()
@@ -126,7 +125,7 @@ bool ContainerPage::checkAction(int code, const QString& selectedCard, const QSt
 		if(ui->rightPane->hasItem(
 			[selectedCard, selectedMobile, code](Item* const item) -> bool
 			{
-				auto signatureItem = qobject_cast<SignatureItem* const>(item);
+				auto *signatureItem = qobject_cast<SignatureItem* const>(item);
 				return signatureItem && signatureItem->isSelfSigned(selectedCard, (code == SignatureMobile) ? selectedMobile: QString());
 			}
 		))
@@ -179,15 +178,13 @@ void ContainerPage::forward(int code)
 	{
 	case SignatureMobile:
 	{
-		MobileDialog dlg(this);
-		QString newCode = QSettings().value(QStringLiteral("MobileCode")).toString();
-		if(dlg.exec() == QDialog::Accepted)
+		if(MobileDialog dlg(this); dlg.exec() == QDialog::Accepted)
 		{
 			if(checkAction(SignatureMobile, dlg.idCode(), dlg.phoneNo()))
 				emit action(SignatureMobile, dlg.idCode(), dlg.phoneNo());
 		}
 
-		if (newCode != mobileCode)
+		if(QString newCode = Settings::MOBILEID_CODE; newCode != mobileCode)
 		{
 			mobileCode = newCode;
 			cardChanged(cardInReader);
@@ -196,15 +193,13 @@ void ContainerPage::forward(int code)
 	}
 	case SignatureSmartID:
 	{
-		SmartIDDialog dlg(this);
-		QString newCode = QSettings().value(QStringLiteral("SmartID")).toString();
-		if(dlg.exec() == QDialog::Accepted)
+		if(SmartIDDialog dlg(this); dlg.exec() == QDialog::Accepted)
 		{
 			if(checkAction(SignatureMobile, dlg.idCode(), {}))
 				emit action(SignatureSmartID, dlg.country(), dlg.idCode());
 		}
 
-		if (newCode != mobileCode)
+		if(QString newCode = Settings::SMARTID_CODE; newCode != mobileCode)
 		{
 			mobileCode = newCode;
 			cardChanged(cardInReader);
@@ -266,7 +261,7 @@ void ContainerPage::showMainAction(const QList<Actions> &actions)
 {
 	if(!mainAction)
 	{
-		mainAction.reset(new MainAction(this));
+		mainAction = std::make_unique<MainAction>(this);
 		connect(mainAction.get(), &MainAction::action, this, &ContainerPage::forward);
 	}
 	mainAction->showActions(actions);
@@ -327,7 +322,7 @@ void ContainerPage::transition(DigiDoc* container)
 
 		for(const DigiDocSignature &c: container->timestamps())
 		{
-			SignatureItem *item = new SignatureItem(c, container->state(), ui->rightPane);
+			auto *item = new SignatureItem(c, container->state(), ui->rightPane);
 			if(c.isInvalid())
 				addError(item);
 			ui->rightPane->addHeaderWidget(item);
@@ -336,7 +331,7 @@ void ContainerPage::transition(DigiDoc* container)
 
 	for(const DigiDocSignature &c: container->signatures())
 	{
-		SignatureItem *item = new SignatureItem(c, container->state(), ui->rightPane);
+		auto *item = new SignatureItem(c, container->state(), ui->rightPane);
 		if(c.isInvalid())
 			addError(item);
 		ui->rightPane->addWidget(item);
@@ -391,7 +386,7 @@ void ContainerPage::updatePanes(ContainerState state)
 {
 	ui->leftPane->stateChange(state);
 	ui->rightPane->stateChange(state);
-	bool showPrintSummary = QSettings().value(QStringLiteral("ShowPrintSummary"), false).toBool();
+	bool showPrintSummary = Settings::SHOW_PRINT_SUMMARY;
 	auto setButtonsVisible = [](const QVector<QWidget*> &buttons, bool visible) {
 		for(QWidget *button: buttons) button->setVisible(visible);
 	};
diff --git a/client/widgets/MainAction.cpp b/client/widgets/MainAction.cpp
index 56677d3a7..9a3fe55d4 100644
--- a/client/widgets/MainAction.cpp
+++ b/client/widgets/MainAction.cpp
@@ -19,10 +19,9 @@
 
 #include "MainAction.h"
 #include "ui_MainAction.h"
+#include "Settings.h"
 #include "Styles.h"
-#include "dialogs/SettingsDialog.h"
 
-#include <QtCore/QSettings>
 #include <QtGui/QPainter>
 #include <QtGui/QPainterPath>
 #include <QtGui/QPaintEvent>
@@ -49,9 +48,9 @@ MainAction::MainAction(QWidget *parent)
 
 	connect(ui->mainAction, &QPushButton::clicked, this, [&]{
 		if (ui->actions.value(0) == Actions::SignatureMobile)
-			SettingsDialog::setValueEx("MIDOrder", true, true);
+			Settings::MOBILEID_ORDER = true;
 		if (ui->actions.value(0) == Actions::SignatureSmartID)
-			SettingsDialog::setValueEx("MIDOrder", false, true);
+			Settings::MOBILEID_ORDER = false;
 	});
 	connect(ui->mainAction, &QPushButton::clicked, this, [&]{ emit action(ui->actions.value(0)); });
 	connect(ui->mainAction, &QPushButton::clicked, this, &MainAction::hideDropdown);
@@ -103,7 +102,7 @@ bool MainAction::eventFilter(QObject *watched, QEvent *event)
 	case QEvent::Paint:
 		if(watched == ui->otherCards)
 		{
-			QToolButton *button = qobject_cast<QToolButton*>(watched);
+			auto *button = qobject_cast<QToolButton*>(watched);
 			QPainter painter(button);
 			painter.setRenderHint(QPainter::Antialiasing);
 			if(ui->otherCards->property("pressed").toBool())
@@ -128,7 +127,7 @@ bool MainAction::eventFilter(QObject *watched, QEvent *event)
 }
 
 
-QString MainAction::label(Actions action) const
+QString MainAction::label(Actions action)
 {
 	switch(action)
 	{
@@ -154,7 +153,7 @@ void MainAction::showActions(const QList<Actions> &actions)
 		std::all_of(order.cbegin(), order.cend(), [] (Actions action) {
 			return action == SignatureMobile || action == SignatureSmartID;
 		}) &&
-		!QSettings().value("MIDOrder", true).toBool())
+		!Settings::MOBILEID_ORDER)
 	{
 		std::reverse(order.begin(), order.end());
 	}
@@ -170,7 +169,7 @@ void MainAction::showDropdown()
 	{
 		for(QList<Actions>::const_iterator i = ui->actions.cbegin() + 1; i != ui->actions.cend(); ++i)
 		{
-			QPushButton *other = new QPushButton(label(*i), parentWidget());
+			auto *other = new QPushButton(label(*i), parentWidget());
 			other->setAccessibleName(label(*i).toLower());
 			other->setCursor(ui->mainAction->cursor());
 			other->setFont(ui->mainAction->font());
@@ -180,9 +179,9 @@ void MainAction::showDropdown()
 			other->setStyleSheet(ui->mainAction->styleSheet() +
 				QStringLiteral("\nborder-top-left-radius: 2px; border-top-right-radius: 2px;"));
 			if (*i == Actions::SignatureMobile)
-				connect(other, &QPushButton::clicked, this, []{ SettingsDialog::setValueEx("MIDOrder", true, true); });
+				connect(other, &QPushButton::clicked, this, []{ Settings::MOBILEID_ORDER = true; });
 			if (*i == Actions::SignatureSmartID)
-				connect(other, &QPushButton::clicked, this, []{ SettingsDialog::setValueEx("MIDOrder", false, true); });
+				connect(other, &QPushButton::clicked, this, []{ Settings::MOBILEID_ORDER = false; });
 			connect(other, &QPushButton::clicked, this, &MainAction::hideDropdown);
 			connect(other, &QPushButton::clicked, this, [=]{ emit this->action(*i); });
 			ui->list.push_back(other);
diff --git a/client/widgets/MainAction.h b/client/widgets/MainAction.h
index 80349614c..263d95ff0 100644
--- a/client/widgets/MainAction.h
+++ b/client/widgets/MainAction.h
@@ -41,10 +41,11 @@ class MainAction final : public QWidget
 private:
 	void changeEvent(QEvent* event) override;
 	bool eventFilter(QObject *watched, QEvent *event) override;
-	QString label(ria::qdigidoc4::Actions action) const;
 	void showDropdown();
 	void update();
 
+	static QString label(ria::qdigidoc4::Actions action);
+
 	class Private;
 	Private *ui;
 };