diff --git a/src/ui/util/stringutil.cpp b/src/ui/util/stringutil.cpp
index af3ff737..98eda7db 100644
--- a/src/ui/util/stringutil.cpp
+++ b/src/ui/util/stringutil.cpp
@@ -9,17 +9,30 @@ QString StringUtil::capitalize(const QString &text)
     return firstChar.toUpper() + text.mid(1);
 }
 
+QByteArray StringUtil::cryptoSha1(const QByteArray &data)
+{
+    return QCryptographicHash::hash(data, QCryptographicHash::Sha1);
+}
+
 QString StringUtil::cryptoHash(const QString &text)
 {
     if (text.isEmpty())
         return QString();
 
     const QByteArray data = text.toUtf8();
-    const QByteArray hash = QCryptographicHash::hash(data, QCryptographicHash::Sha1);
+    const QByteArray hash = cryptoSha1(data);
 
     return QString::fromLatin1(hash.toHex());
 }
 
+QByteArray StringUtil::serviceSid(const QString &serviceName)
+{
+    const auto name = serviceName.toUpper();
+    const QByteArray nameData((const char *) name.utf16(), name.size() * sizeof(wchar_t));
+
+    return StringUtil::cryptoSha1(nameData);
+}
+
 int StringUtil::lineStart(const QString &text, int pos, int badPos)
 {
     const int startPos = text.lastIndexOf(QLatin1Char('\n'), pos);
diff --git a/src/ui/util/stringutil.h b/src/ui/util/stringutil.h
index 52ad4f21..fddcd9b2 100644
--- a/src/ui/util/stringutil.h
+++ b/src/ui/util/stringutil.h
@@ -11,8 +11,11 @@ class StringUtil
 public:
     static QString capitalize(const QString &text);
 
+    static QByteArray cryptoSha1(const QByteArray &data);
     static QString cryptoHash(const QString &text);
 
+    static QByteArray serviceSid(const QString &serviceName);
+
     static int lineStart(const QString &text, int pos, int badPos = -1);
     static int lineEnd(const QString &text, int pos, int badPos = -1);