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diff --git a/lang/qt/src/filelistdataprovider.h b/lang/qt/src/filelistdataprovider.h
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+/*
+    filelistdataprovider.h
+
+    This file is part of qgpgme, the Qt API binding for gpgme
+    Copyright (c) 2023 g10 Code GmbH
+    Software engineering by Ingo Klöcker <[email protected]>
+
+    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_FILELISTDATAPROVIDER_H__
+#define __QGPGME_FILELISTDATAPROVIDER_H__
+
+#include "qgpgme_export.h"
+
+#ifdef BUILDING_QGPGME
+#include <interfaces/dataprovider.h>
+#else
+#include <gpgme++/interfaces/dataprovider.h>
+#endif
+
+#include <memory>
+#include <vector>
+
+class QString;
+
+namespace QGpgME
+{
+
+/**
+ * This read-only data provider simplifies providing a nul-separated list of
+ * UTF-8-encoded filenames, e.g. for creating signed or encrypted archives.
+ */
+class QGPGME_EXPORT FileListDataProvider : public GpgME::DataProvider
+{
+public:
+    explicit FileListDataProvider(const std::vector<QString> &filenames);
+    ~FileListDataProvider() override;
+
+private:
+    bool isSupported(Operation op) const override
+    {
+        return op != Operation::Write;
+    }
+    ssize_t read(void *buffer, size_t bufSize) override;
+    ssize_t write(const void *buffer, size_t bufSize) override;
+    off_t seek(off_t offset, int whence) override;
+    void release() override;
+
+private:
+    std::unique_ptr<GpgME::DataProvider> mProvider;
+};
+
+}
+
+#endif // __QGPGME_FILELISTDATAPROVIDER_H__