diff --git a/3rdparty/o2/src/o2settingsstore.cpp b/3rdparty/o2/src/o2settingsstore.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..a71e5b81156e8359a3e2c1fcd650d1e755c44620
--- /dev/null
+++ b/3rdparty/o2/src/o2settingsstore.cpp
@@ -0,0 +1,47 @@
+#include <QCryptographicHash>
+#include <QByteArray>
+
+#include "o2settingsstore.h"
+
+static quint64 getHash(const QString &encryptionKey) {
+    return QCryptographicHash::hash(encryptionKey.toLatin1(), QCryptographicHash::Sha1).toULongLong();
+}
+
+O2SettingsStore::O2SettingsStore(const QString &encryptionKey, QObject *parent):
+    O2AbstractStore(parent), crypt_(getHash(encryptionKey)) {
+    settings_ = new QSettings(this);
+}
+
+O2SettingsStore::O2SettingsStore(QSettings *settings, const QString &encryptionKey, QObject *parent):
+    O2AbstractStore(parent), crypt_(getHash(encryptionKey)) {
+    settings_ = settings;
+    settings_->setParent(this);
+}
+
+O2SettingsStore::~O2SettingsStore() {
+}
+
+QString O2SettingsStore::groupKey() const {
+    return groupKey_;
+}
+
+void O2SettingsStore::setGroupKey(const QString &groupKey) {
+    if (groupKey_ == groupKey) {
+        return;
+    }
+    groupKey_ = groupKey;
+    emit groupKeyChanged();
+}
+
+QString O2SettingsStore::value(const QString &key, const QString &defaultValue) {
+    QString fullKey = groupKey_.isEmpty() ? key : (groupKey_ + '/' + key);
+    if (!settings_->contains(fullKey)) {
+        return defaultValue;
+    }
+    return crypt_.decryptToString(settings_->value(fullKey).toString());
+}
+
+void O2SettingsStore::setValue(const QString &key, const QString &value) {
+    QString fullKey = groupKey_.isEmpty() ? key : (groupKey_ + '/' + key);
+    settings_->setValue(fullKey, crypt_.encryptToString(value));
+}