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diff --git a/lang/qt/src/qgpgmebackend.h b/lang/qt/src/qgpgmebackend.h
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+/*
+    qgpgmebackend.h
+
+    This file is part of qgpgme, the Qt API binding for gpgme
+    Copyright (c) 2004,2005 Klarälvdalens Datakonsult AB
+    Copyright (c) 2016 Intevation GmbH
+
+    QGpgME is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.
+
+    QGpgME 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
+    General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of this program with any edition of
+    the Qt library by Trolltech AS, Norway (or with modified versions
+    of Qt that use the same license as Qt), and distribute linked
+    combinations including the two.  You must obey the GNU General
+    Public License in all respects for all of the code used other than
+    Qt.  If you modify this file, you may extend this exception to
+    your version of the file, but you are not obligated to do so.  If
+    you do not wish to do so, delete this exception statement from
+    your version.
+*/
+
+#ifndef __QGPGME_QGPGMEBACKEND_H__
+#define __QGPGME_QGPGMEBACKEND_H__
+
+#include <QString>
+
+#include "protocol.h"
+
+class QString;
+template <typename T_Key, typename T_Value> class QMap;
+
+namespace QGpgME
+{
+class CryptoConfig;
+class Protocol;
+
+
+class QGpgMEBackend
+{
+public:
+    QGpgMEBackend();
+    ~QGpgMEBackend();
+
+    QString name() const;
+    QString displayName() const;
+
+    CryptoConfig *config() const;
+
+    Protocol *openpgp() const;
+    Protocol *smime() const;
+    Protocol *protocol(const char *name) const;
+
+    static const char OpenPGP[];
+    static const char SMIME[];
+
+    bool checkForOpenPGP(QString *reason = Q_NULLPTR) const;
+    bool checkForSMIME(QString *reason = Q_NULLPTR) const;
+    bool checkForProtocol(const char *name, QString *reason) const;
+
+    bool supportsOpenPGP() const
+    {
+        return true;
+    }
+    bool supportsSMIME() const
+    {
+        return true;
+    }
+    bool supportsProtocol(const char *name) const;
+
+    const char *enumerateProtocols(int i) const;
+
+private:
+    mutable QGpgME::CryptoConfig *mCryptoConfig;
+    mutable Protocol *mOpenPGPProtocol;
+    mutable Protocol *mSMIMEProtocol;
+};
+
+}
+
+#endif // __QGPGME_QGPGMEBACKEND_H__