+ QByteArray knownDigest(const QHostAddress &address);
+ void saveKnownHost(const QHostAddress &address, const QByteArray &certDigest);
+ bool isKnownHost(const QHostAddress &address, const QByteArray &certDigest);
+
+#ifdef HAVE_SSL
+ QByteArray knownDigest(const QSslSocket *socket);
+ void saveKnownHost(const QSslSocket *socket);
+ bool isKnownHost(const QSslSocket *socket);
+#endif