Warning, file /plasma/sddm-kcm/sddmauthhelper.cpp was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 /*
     SPDX-FileCopyrightText: 2019 Filip Fila <filipfila.kde@gmail.com>
     SPDX-FileCopyrightText: 2013 Reza Fatahilah Shah <rshah0385@kireihana.com>
     SPDX-FileCopyrightText: 2011, 2012 David Edmundson <kde@davidedmundson.co.uk>
 
     SPDX-License-Identifier: GPL-2.0-or-later
  */
 #include "sddmauthhelper.h"
 #include "src/config.h"
 
 #include <unistd.h>
 
 #include <QDebug>
 #include <QDir>
 #include <QFile>
 #include <QFileInfo>
 #include <QMimeDatabase>
 #include <QMimeType>
 #include <QSharedPointer>
 
 #include <KArchive>
 #include <KConfig>
 #include <KConfigGroup>
 #include <KLazyLocalizedString>
 #include <KLocalizedString>
 #include <KTar>
 #include <KUser>
 #include <KZip>
 
 static QSharedPointer<KConfig> openConfig(const QString &filePath)
 {
     // if the sddm.conf.d folder doesn't exist we fail to set the right permissions for kde_settings.conf
     QFileInfo fileLocation(filePath);
     QDir dir(fileLocation.absolutePath());
     if (!dir.exists()) {
         QDir().mkpath(dir.path());
     }
     QFile file(filePath);
     if (!file.exists()) {
         // If we are creating the config file, ensure it is world-readable: if
         // we don't do that, KConfig will create a file which is only readable
         // by root
         file.open(QIODevice::WriteOnly);
         file.close();
         file.setPermissions(QFile::ReadOwner | QFile::WriteOwner | QFile::ReadGroup | QFile::ReadOther);
     }
     // in case the file has already been created with wrong permissions
     else if (!(file.permissions() & QFile::ReadOwner & QFile::WriteOwner & QFile::ReadGroup & QFile::ReadOther)) {
         file.setPermissions(QFile::ReadOwner | QFile::WriteOwner | QFile::ReadGroup | QFile::ReadOther);
     }
 
     return QSharedPointer<KConfig>(new KConfig(file.fileName(), KConfig::SimpleConfig));
 }
 
 void SddmAuthHelper::copyDirectoryRecursively(const QString &source, const QString &destination, QSet<QString> &done)
 {
     if (done.contains(source)) {
         return;
     }
     done.insert(source);
 
     const QDir sourceDir(source);
     const auto entries = sourceDir.entryInfoList(QDir::NoDotAndDotDot | QDir::Dirs | QDir::Files);
     for (const auto &entry : entries) {
         const auto destinationPath = destination + '/' + entry.fileName();
         if (entry.isFile()) {
             copyFile(entry.absoluteFilePath(), destinationPath);
         } else {
             QDir().mkpath(destinationPath);
             copyDirectoryRecursively(entry.absoluteFilePath(), destinationPath, done);
         }
     }
 }
 
 void SddmAuthHelper::copyFile(const QString &source, const QString &destination)
 {
     KUser sddmUser(QStringLiteral("sddm"));
 
     if (QFile::exists(destination)) {
         QFile::remove(destination);
     }
 
     if (!QFile::copy(source, destination)) {
         qWarning() << "Could not copy" << source << "to" << destination;
     }
     const char *destinationConverted = destination.toLocal8Bit().data();
     if (chown(destinationConverted, sddmUser.userId().nativeId(), sddmUser.groupId().nativeId())) {
         return;
     }
 }
 
 ActionReply SddmAuthHelper::sync(const QVariantMap &args)
 {
     // initial check for sddm user; abort if user not present
     // we have to check with QString and isEmpty() instead of QDir and exists() because
     // QDir returns "." and true for exists() in the case of a non-existent user;
     QString sddmHomeDirPath = KUser("sddm").homeDir();
     if (sddmHomeDirPath.isEmpty()) {
         qDebug() << "Cannot proceed, user 'sddm' does not exist. Please check your SDDM install.";
         return ActionReply::HelperErrorReply();
     }
 
     // In plasma-framework, ThemePrivate::useCache documents the requirement to
     // clear the cache when colors change while the app that uses them isn't running;
     // that condition applies to the SDDM greeter here, so clear the cache if it
     // exists to make sure SDDM has a fresh state
     QDir sddmCacheLocation(sddmHomeDirPath + QStringLiteral("/.cache"));
     if (sddmCacheLocation.exists()) {
         sddmCacheLocation.removeRecursively();
     }
 
     // create SDDM config directory if it does not exist
     QDir sddmConfigLocation(sddmHomeDirPath + QStringLiteral("/.config"));
     if (!sddmConfigLocation.exists()) {
         QDir().mkpath(sddmConfigLocation.path());
     }
 
     // copy fontconfig (font, font rendering)
     if (!args[QStringLiteral("fontconfig")].isNull()) {
         QDir fontconfigSource(args[QStringLiteral("fontconfig")].toString());
         QStringList sourceFileEntries = fontconfigSource.entryList(QDir::Files);
         QStringList sourceDirEntries = fontconfigSource.entryList(QDir::AllDirs);
         QDir fontconfigDestination(sddmConfigLocation.path() + QStringLiteral("/fontconfig"));
 
         if (!fontconfigDestination.exists()) {
             QDir().mkpath(fontconfigDestination.path());
         }
 
         if (sourceDirEntries.count() != 0) {
             for (int i = 0; i < sourceDirEntries.count(); i++) {
                 QString directoriesSource = fontconfigSource.path() + QDir::separator() + sourceDirEntries[i];
                 QString directoriesDestination = fontconfigDestination.path() + QDir::separator() + sourceDirEntries[i];
                 fontconfigSource.mkpath(directoriesDestination);
                 copyFile(directoriesSource, directoriesDestination);
             }
         }
 
         if (sourceFileEntries.count() != 0) {
             for (int i = 0; i < sourceFileEntries.count(); i++) {
                 QString filesSource = fontconfigSource.path() + QDir::separator() + sourceFileEntries[i];
                 QString filesDestination = fontconfigDestination.path() + QDir::separator() + sourceFileEntries[i];
                 copyFile(filesSource, filesDestination);
             }
         }
     }
 
     // copy kdeglobals (color scheme)
     if (!args[QStringLiteral("kdeglobals")].isNull()) {
         QDir kdeglobalsSource(args[QStringLiteral("kdeglobals")].toString());
         QDir kdeglobalsDestination(sddmConfigLocation.path() + QStringLiteral("/kdeglobals"));
         copyFile(kdeglobalsSource.path(), kdeglobalsDestination.path());
     }
 
     // copy plasmarc (icons, UI style)
     if (!args[QStringLiteral("plasmarc")].isNull()) {
         QDir plasmarcSource(args[QStringLiteral("plasmarc")].toString());
         QDir plasmarcDestination(sddmConfigLocation.path() + QStringLiteral("/plasmarc"));
         copyFile(plasmarcSource.path(), plasmarcDestination.path());
     }
 
     // If SDDM is set up to use Wayland with KWin, NumLock is controlled by this
     if (!args[QStringLiteral("kcminputrc")].isNull()) {
         QDir kcminputrcSource(args[QStringLiteral("kcminputrc")].toString());
         QDir kcminputrcDestination(sddmConfigLocation.path() + QStringLiteral("/kcminputrc"));
         copyFile(kcminputrcSource.path(), kcminputrcDestination.path());
     }
 
     // copy kscreen config
     if (!args[QStringLiteral("kscreen-config")].isNull()) {
         const QString destinationDir = sddmHomeDirPath + "/.local/share/kscreen/";
         QSet<QString> done;
         copyDirectoryRecursively(args[QStringLiteral("kscreen-config")].toString(), destinationDir, done);
     }
 
     // write cursor theme, NumLock preference, and scaling DPI to config file
     ActionReply reply = ActionReply::HelperErrorReply();
     QSharedPointer<KConfig> sddmConfig = openConfig(args[QStringLiteral("kde_settings.conf")].toString());
     QSharedPointer<KConfig> sddmOldConfig = openConfig(args[QStringLiteral("sddm.conf")].toString());
 
     QMap<QString, QVariant>::const_iterator iterator;
 
     for (iterator = args.constBegin(); iterator != args.constEnd(); ++iterator) {
         if (iterator.key() == QLatin1String("kde_settings.conf")) {
             continue;
         }
 
         QStringList configFields = iterator.key().split(QLatin1Char('/'));
         if (configFields.size() != 3) {
             continue;
         }
 
         QSharedPointer<KConfig> config;
         QString fileName = configFields[0];
         QString groupName = configFields[1];
         QString keyName = configFields[2];
 
         if (fileName == QLatin1String("kde_settings.conf") && iterator.value().isValid()) {
             sddmConfig->group(groupName).writeEntry(keyName, iterator.value());
             sddmOldConfig->group(groupName).deleteEntry(keyName);
         }
     }
 
     sddmOldConfig->sync();
     sddmConfig->sync();
 
     return ActionReply::SuccessReply();
 }
 
 ActionReply SddmAuthHelper::reset(const QVariantMap &args)
 {
     // initial check for sddm user; abort if user not present
     // we have to check with QString and isEmpty() instead of QDir and exists() because
     // QDir returns "." and true for exists() in the case of a non-existent user;
     QString sddmHomeDirPath = KUser("sddm").homeDir();
     if (sddmHomeDirPath.isEmpty()) {
         qDebug() << "Cannot proceed, user 'sddm' does not exist. Please check your SDDM install.";
         return ActionReply::HelperErrorReply();
     }
 
     QDir sddmConfigLocation(sddmHomeDirPath + QStringLiteral("/.config"));
     QDir fontconfigDir(args[QStringLiteral("sddmUserConfig")].toString() + QStringLiteral("/fontconfig"));
 
     fontconfigDir.removeRecursively();
     QFile::remove(sddmConfigLocation.path() + QStringLiteral("/kdeglobals"));
     QFile::remove(sddmConfigLocation.path() + QStringLiteral("/plasmarc"));
 
     QDir(sddmHomeDirPath + "/.local/share/kscreen/").removeRecursively();
 
     // remove cursor theme, NumLock preference, and scaling DPI from config file
     ActionReply reply = ActionReply::HelperErrorReply();
     QSharedPointer<KConfig> sddmConfig = openConfig(args[QStringLiteral("kde_settings.conf")].toString());
     QSharedPointer<KConfig> sddmOldConfig = openConfig(args[QStringLiteral("sddm.conf")].toString());
 
     QMap<QString, QVariant>::const_iterator iterator;
 
     for (iterator = args.constBegin(); iterator != args.constEnd(); ++iterator) {
         if (iterator.key() == QLatin1String("kde_settings.conf")) {
             continue;
         }
 
         QStringList configFields = iterator.key().split(QLatin1Char('/'));
         if (configFields.size() != 3) {
             continue;
         }
 
         QSharedPointer<KConfig> config;
         QString fileName = configFields[0];
         QString groupName = configFields[1];
         QString keyName = configFields[2];
 
         if (fileName == QLatin1String("kde_settings.conf")) {
             sddmConfig->group(groupName).deleteEntry(keyName);
             sddmOldConfig->group(groupName).deleteEntry(keyName);
         }
     }
 
     sddmOldConfig->sync();
     sddmConfig->sync();
 
     return ActionReply::SuccessReply();
 }
 
 ActionReply SddmAuthHelper::save(const QVariantMap &args)
 {
     ActionReply reply = ActionReply::HelperErrorReply();
     QSharedPointer<KConfig> sddmConfig = openConfig(QString{QLatin1String(SDDM_CONFIG_DIR "/") + QStringLiteral("kde_settings.conf")});
     QSharedPointer<KConfig> sddmOldConfig = openConfig(QStringLiteral(SDDM_CONFIG_FILE));
     QSharedPointer<KConfig> themeConfig;
     QString themeConfigFile = args[QStringLiteral("theme.conf.user")].toString();
 
     if (!themeConfigFile.isEmpty()) {
         themeConfig = openConfig(themeConfigFile);
     }
 
     QMap<QString, QVariant>::const_iterator iterator;
 
     for (iterator = args.constBegin(); iterator != args.constEnd(); ++iterator) {
         if (iterator.key() == QLatin1String("kde_settings.conf") || iterator.key() == QLatin1String("theme.conf.user")) {
             continue;
         }
 
         QStringList configFields = iterator.key().split(QLatin1Char('/'));
         if (configFields.size() != 3) {
             continue;
         }
 
         QString fileName = configFields[0];
         QString groupName = configFields[1];
         QString keyName = configFields[2];
 
         // if there is an identical keyName in "sddm.conf" we want to delete it so SDDM doesn't read from the old file
         // hierarchically SDDM prefers "etc/sddm.conf" to "/etc/sddm.conf.d/some_file.conf"
 
         if (fileName == QLatin1String("kde_settings.conf")) {
             sddmConfig->group(groupName).writeEntry(keyName, iterator.value());
             sddmOldConfig->group(groupName).deleteEntry(keyName);
         } else if (fileName == QLatin1String("theme.conf.user") && !themeConfig.isNull()) {
             QFileInfo themeConfigFileInfo(themeConfigFile);
             QDir configRootDirectory = themeConfigFileInfo.absoluteDir();
 
             if (keyName == QLatin1String("background")) {
                 QFileInfo newBackgroundFileInfo(iterator.value().toString());
                 QString previousBackground = themeConfig->group(groupName).readEntry(keyName);
 
                 bool backgroundChanged = newBackgroundFileInfo.fileName() != previousBackground;
                 if (backgroundChanged) {
                     if (!previousBackground.isEmpty()) {
                         QString previousBackgroundPath = configRootDirectory.filePath(previousBackground);
                         if (QFile::remove(previousBackgroundPath)) {
                             qDebug() << "Removed previous background " << previousBackgroundPath;
                         }
                     }
 
                     if (newBackgroundFileInfo.exists()) {
                         QString newBackgroundPath = configRootDirectory.filePath(newBackgroundFileInfo.fileName());
                         qDebug() << "Copying background from " << newBackgroundFileInfo.absoluteFilePath() << " to " << newBackgroundPath;
                         if (QFile::copy(newBackgroundFileInfo.absoluteFilePath(), newBackgroundPath)) {
                             QFile::setPermissions(newBackgroundPath, QFile::ReadOwner | QFile::WriteOwner | QFile::ReadGroup | QFile::ReadOther);
                             themeConfig->group(groupName).writeEntry(keyName, newBackgroundFileInfo.fileName());
                         }
                     } else {
                         themeConfig->group(groupName).deleteEntry(keyName);
                     }
                 }
             } else {
                 themeConfig->group(groupName).writeEntry(keyName, iterator.value());
             }
         }
     }
 
     sddmOldConfig->sync();
     sddmConfig->sync();
 
     if (!themeConfig.isNull()) {
         themeConfig->sync();
     }
 
     return ActionReply::SuccessReply();
 }
 
 ActionReply SddmAuthHelper::installtheme(const QVariantMap &args)
 {
     const QString filePath = args[QStringLiteral("filePath")].toString();
     if (filePath.isEmpty()) {
         return ActionReply::HelperErrorReply();
     }
 
     const QString themesBaseDir = QStandardPaths::locate(QStandardPaths::GenericDataLocation, QStringLiteral("sddm/themes"), QStandardPaths::LocateDirectory);
     QDir dir(themesBaseDir);
     if (!dir.exists()) {
         return ActionReply::HelperErrorReply();
     }
 
     qDebug() << "Installing " << filePath << " into " << themesBaseDir;
 
     if (!QFile::exists(filePath)) {
         return ActionReply::HelperErrorReply();
     }
 
     QMimeDatabase db;
     QMimeType mimeType = db.mimeTypeForFile(filePath);
     qWarning() << "Postinstallation: uncompress the file";
 
     QScopedPointer<KArchive> archive;
 
     // there must be a better way to do this? If not, make a static bool KZip::supportsMimeType(const QMimeType &type); ?
     // or even a factory class in KArchive
 
     if (mimeType.inherits(QStringLiteral("application/zip"))) {
         archive.reset(new KZip(filePath));
     } else if (mimeType.inherits(QStringLiteral("application/tar")) || mimeType.inherits(QStringLiteral("application/x-gzip"))
                || mimeType.inherits(QStringLiteral("application/x-bzip")) || mimeType.inherits(QStringLiteral("application/x-lzma"))
                || mimeType.inherits(QStringLiteral("application/x-xz")) || mimeType.inherits(QStringLiteral("application/x-bzip-compressed-tar"))
                || mimeType.inherits(QStringLiteral("application/x-compressed-tar"))) {
         archive.reset(new KTar(filePath));
     } else {
         auto e = ActionReply::HelperErrorReply();
         e.setErrorDescription(kli18n("Invalid theme package").untranslatedText());
         return e;
     }
 
     if (!archive->open(QIODevice::ReadOnly)) {
         auto e = ActionReply::HelperErrorReply();
         e.setErrorDescription(kli18n("Could not open file").untranslatedText());
         return e;
     }
 
     auto directory = archive->directory();
 
     QStringList installedPaths;
 
     // some basic validation
     // the top level should only have folders, and those folders should contain a valid metadata.desktop file
     // if we get anything else, abort everything before copying
     const auto entries = directory->entries();
     for (const QString &name : entries) {
         auto entry = directory->entry(name);
         if (!entry->isDirectory()) {
             auto e = ActionReply::HelperErrorReply();
             e.setErrorDescription(kli18n("Invalid theme package").untranslatedText());
             return e;
         }
         auto subDirectory = static_cast<const KArchiveDirectory *>(entry);
         auto metadataFile = subDirectory->file(QStringLiteral("metadata.desktop"));
         if (!metadataFile || !metadataFile->data().contains("[SddmGreeterTheme]")) {
             auto e = ActionReply::HelperErrorReply();
             e.setErrorDescription(kli18n("Invalid theme package").untranslatedText());
             return e;
         }
         installedPaths.append(themesBaseDir + QLatin1Char('/') + name);
     }
 
     if (!directory->copyTo(themesBaseDir)) {
         auto e = ActionReply::HelperErrorReply();
         e.setErrorDescription(kli18n("Could not decompress archive").untranslatedText());
         return e;
     }
 
     auto rc = ActionReply::SuccessReply();
     rc.addData(QStringLiteral("installedPaths"), installedPaths);
     return rc;
 }
 
 ActionReply SddmAuthHelper::uninstalltheme(const QVariantMap &args)
 {
     const QString themePath = args[QStringLiteral("filePath")].toString();
     const QString themesBaseDir = QStandardPaths::locate(QStandardPaths::GenericDataLocation, QStringLiteral("sddm/themes"), QStandardPaths::LocateDirectory);
 
     QDir dir(themePath);
     if (!dir.exists()) {
         return ActionReply::HelperErrorReply();
     }
 
     // validate the themePath is directly inside the themesBaseDir
     QDir baseDir(themesBaseDir);
     if (baseDir.absoluteFilePath(dir.dirName()) != dir.absolutePath()) {
         return ActionReply::HelperErrorReply();
     }
 
     if (!dir.removeRecursively()) {
         return ActionReply::HelperErrorReply();
     }
 
     return ActionReply::SuccessReply();
 }
 
 KAUTH_HELPER_MAIN("org.kde.kcontrol.kcmsddm", SddmAuthHelper)
 
 #include "moc_sddmauthhelper.cpp"