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diff --git a/lang/qt/src/qgpgmedecryptverifyjob.cpp b/lang/qt/src/qgpgmedecryptverifyjob.cpp
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+++ b/lang/qt/src/qgpgmedecryptverifyjob.cpp
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+/*
+    qgpgmedecryptverifyjob.cpp
+
+    This file is part of qgpgme, the Qt API binding for gpgme
+    Copyright (c) 2004,2008 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.
+*/
+
+#include "qgpgmedecryptverifyjob.h"
+
+#include "dataprovider.h"
+
+#include "context.h"
+#include "decryptionresult.h"
+#include "verificationresult.h"
+#include "data.h"
+
+#include <QDebug>
+#include "gpgme_backend_debug.h"
+
+#include <QBuffer>
+
+#include <cassert>
+
+using namespace QGpgME;
+using namespace GpgME;
+
+QGpgMEDecryptVerifyJob::QGpgMEDecryptVerifyJob(Context *context)
+    : mixin_type(context)
+{
+    lateInitialization();
+}
+
+QGpgMEDecryptVerifyJob::~QGpgMEDecryptVerifyJob() {}
+
+static QGpgMEDecryptVerifyJob::result_type decrypt_verify(Context *ctx, QThread *thread,
+                                                          const std::weak_ptr<QIODevice> &cipherText_,
+                                                          const std::weak_ptr<QIODevice> &plainText_)
+{
+
+    qCDebug(GPGPME_BACKEND_LOG);
+
+    const std::shared_ptr<QIODevice> cipherText = cipherText_.lock();
+    const std::shared_ptr<QIODevice> plainText = plainText_.lock();
+
+    const _detail::ToThreadMover ctMover(cipherText, thread);
+    const _detail::ToThreadMover ptMover(plainText,  thread);
+
+    QGpgME::QIODeviceDataProvider in(cipherText);
+    const Data indata(&in);
+
+    if (!plainText) {
+        QGpgME::QByteArrayDataProvider out;
+        Data outdata(&out);
+
+        const std::pair<DecryptionResult, VerificationResult> res = ctx->decryptAndVerify(indata, outdata);
+        Error ae;
+        const QString log = _detail::audit_log_as_html(ctx, ae);
+        qCDebug(GPGPME_BACKEND_LOG) << "End no plainText. Error: " << ae;
+        return std::make_tuple(res.first, res.second, out.data(), log, ae);
+    } else {
+        QGpgME::QIODeviceDataProvider out(plainText);
+        Data outdata(&out);
+
+        const std::pair<DecryptionResult, VerificationResult> res = ctx->decryptAndVerify(indata, outdata);
+        Error ae;
+        const QString log = _detail::audit_log_as_html(ctx, ae);
+        qCDebug(GPGPME_BACKEND_LOG) << "End plainText. Error: " << ae;
+        return std::make_tuple(res.first, res.second, QByteArray(), log, ae);
+    }
+
+}
+
+static QGpgMEDecryptVerifyJob::result_type decrypt_verify_qba(Context *ctx, const QByteArray &cipherText)
+{
+    const std::shared_ptr<QBuffer> buffer(new QBuffer);
+    buffer->setData(cipherText);
+    if (!buffer->open(QIODevice::ReadOnly)) {
+        assert(!"This should never happen: QBuffer::open() failed");
+    }
+    return decrypt_verify(ctx, 0, buffer, std::shared_ptr<QIODevice>());
+}
+
+Error QGpgMEDecryptVerifyJob::start(const QByteArray &cipherText)
+{
+    run(std::bind(&decrypt_verify_qba, std::placeholders::_1, cipherText));
+    return Error();
+}
+
+void QGpgMEDecryptVerifyJob::start(const std::shared_ptr<QIODevice> &cipherText, const std::shared_ptr<QIODevice> &plainText)
+{
+    run(std::bind(&decrypt_verify, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3, std::placeholders::_4), cipherText, plainText);
+}
+
+std::pair<GpgME::DecryptionResult, GpgME::VerificationResult>
+QGpgME::QGpgMEDecryptVerifyJob::exec(const QByteArray &cipherText, QByteArray &plainText)
+{
+    const result_type r = decrypt_verify_qba(context(), cipherText);
+    plainText = std::get<2>(r);
+    resultHook(r);
+    return mResult;
+}
+
+//PENDING(marc) implement showErrorDialog()
+
+void QGpgMEDecryptVerifyJob::resultHook(const result_type &tuple)
+{
+    mResult = std::make_pair(std::get<0>(tuple), std::get<1>(tuple));
+}
+#include "qgpgmedecryptverifyjob.moc"