diff --git a/lang/qt/tests/t-various.cpp b/lang/qt/tests/t-various.cpp
index 8563b681..72a2487a 100644
--- a/lang/qt/tests/t-various.cpp
+++ b/lang/qt/tests/t-various.cpp
@@ -1,428 +1,428 @@
 /* t-various.cpp
 
     This file is part of qgpgme, the Qt API binding for gpgme
     Copyright (c) 2017 by Bundesamt für Sicherheit in der Informationstechnik
     Software engineering by 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.
 */
 
 #ifdef HAVE_CONFIG_H
  #include "config.h"
 #endif
 
 #include <QDebug>
 #include <QTest>
 #include <QSignalSpy>
 #include <QTemporaryDir>
 #include "keylistjob.h"
 #include "protocol.h"
 #include "keylistresult.h"
 #include "context.h"
 #include "engineinfo.h"
 #include "dn.h"
 #include "data.h"
 #include "dataprovider.h"
 #include "signkeyjob.h"
 
 #include "t-support.h"
 
 using namespace QGpgME;
 using namespace GpgME;
 
 static const char aKey[] = "-----BEGIN PGP PUBLIC KEY BLOCK-----\n"
 "\n"
 "mDMEWG+w/hYJKwYBBAHaRw8BAQdAiq1oStvDYg8ZfFs5DgisYJo8dJxD+C/AA21O\n"
 "K/aif0O0GXRvZnVfY29uZmxpY3RAZXhhbXBsZS5jb22IlgQTFggAPhYhBHoJBLaV\n"
 "DamYAgoa1L5BwMOl/x88BQJYb7D+AhsDBQkDwmcABQsJCAcCBhUICQoLAgQWAgMB\n"
 "Ah4BAheAAAoJEL5BwMOl/x88GvwA/0SxkbLyAcshGm2PRrPsFQsSVAfwaSYFVmS2\n"
 "cMVIw1PfAQDclRH1Z4MpufK07ju4qI33o4s0UFpVRBuSxt7A4P2ZD7g4BFhvsP4S\n"
 "CisGAQQBl1UBBQEBB0AmVrgaDNJ7K2BSalsRo2EkRJjHGqnp5bBB0tapnF81CQMB\n"
 "CAeIeAQYFggAIBYhBHoJBLaVDamYAgoa1L5BwMOl/x88BQJYb7D+AhsMAAoJEL5B\n"
 "wMOl/x88OR0BAMq4/vmJUORRTmzjHcv/DDrQB030DSq666rlckGIKTShAPoDXM9N\n"
 "0gZK+YzvrinSKZXHmn0aSwmC1/hyPybJPEljBw==\n"
 "=p2Oj\n"
 "-----END PGP PUBLIC KEY BLOCK-----\n";
 
 class TestVarious: public QGpgMETest
 {
     Q_OBJECT
 
 Q_SIGNALS:
     void asyncDone();
 
 private Q_SLOTS:
     void testDN()
     {
         DN dn(QStringLiteral("CN=Before\\0DAfter,OU=Test,DC=North America,DC=Fabrikam,DC=COM"));
         QVERIFY(dn.dn() == QStringLiteral("CN=Before\rAfter,OU=Test,DC=North America,DC=Fabrikam,DC=COM"));
         QStringList attrOrder;
         attrOrder << QStringLiteral("DC") << QStringLiteral("OU") << QStringLiteral("CN");
         dn.setAttributeOrder(attrOrder);
         QVERIFY(dn.prettyDN() == QStringLiteral("DC=North America,DC=Fabrikam,DC=COM,OU=Test,CN=Before\rAfter"));
     }
 
     void testKeyFromFile()
     {
         if (GpgME::engineInfo(GpgME::GpgEngine).engineVersion() < "2.1.14") {
             return;
         }
         QGpgME::QByteArrayDataProvider dp(aKey);
         Data data(&dp);
         const auto keys = data.toKeys();
         QVERIFY(keys.size() == 1);
         const auto key = keys[0];
         QVERIFY(!key.isNull());
         QVERIFY(key.primaryFingerprint() == QStringLiteral("7A0904B6950DA998020A1AD4BE41C0C3A5FF1F3C"));
     }
 
     void testDataRewind()
     {
         if (GpgME::engineInfo(GpgME::GpgEngine).engineVersion() < "2.1.14") {
             return;
         }
         QGpgME::QByteArrayDataProvider dp(aKey);
         Data data(&dp);
         char buf[20];
         data.read(buf, 20);
 
         auto keys = data.toKeys();
         QVERIFY(keys.size() == 0);
 
         data.rewind();
 
         keys = data.toKeys();
         QVERIFY(keys.size() == 1);
     }
 
     void testQuickUid()
     {
         if (GpgME::engineInfo(GpgME::GpgEngine).engineVersion() < "2.1.13") {
             return;
         }
         KeyListJob *job = openpgp()->keyListJob(false, true, true);
         std::vector<GpgME::Key> keys;
         GpgME::KeyListResult result = job->exec(QStringList() << QStringLiteral("alfa@example.net"),
                                                 false, keys);
         delete job;
         QVERIFY (!result.error());
         QVERIFY (keys.size() == 1);
         Key key = keys.front();
 
         QVERIFY (key.numUserIDs() == 3);
         const char uid[] = "Foo Bar (with comment) <foo@bar.baz>";
 
         auto ctx = Context::createForProtocol(key.protocol());
         QVERIFY (ctx);
         TestPassphraseProvider provider;
         ctx->setPassphraseProvider(&provider);
         ctx->setPinentryMode(Context::PinentryLoopback);
 
         QVERIFY(!ctx->addUid(key, uid));
         delete ctx;
         key.update();
 
         QVERIFY (key.numUserIDs() == 4);
         bool id_found = false;;
         for (const auto &u: key.userIDs()) {
             if (!strcmp (u.id(), uid)) {
                 QVERIFY (!u.isRevoked());
                 id_found = true;
                 break;
             }
         }
         QVERIFY (id_found);
 
         ctx = Context::createForProtocol(key.protocol());
         QVERIFY (!ctx->revUid(key, uid));
         delete ctx;
         key.update();
 
         bool id_revoked = false;;
         for (const auto &u: key.userIDs()) {
             if (!strcmp (u.id(), uid)) {
                 id_revoked = true;
                 break;
             }
         }
         QVERIFY(id_revoked);
     }
 
     void testSetExpire()
     {
         if (GpgME::engineInfo(GpgME::GpgEngine).engineVersion() < "2.1.22") {
             return;
         }
         KeyListJob *job = openpgp()->keyListJob(false, true, true);
         std::vector<GpgME::Key> keys;
         GpgME::KeyListResult result = job->exec(QStringList() << QStringLiteral("alfa@example.net"),
                                                 false, keys);
         delete job;
         QVERIFY (!result.error());
         QVERIFY (keys.size() == 1);
         Key key = keys.front();
 
         QVERIFY (key.subkey(0).expirationTime() == time_t(0));
         QVERIFY (key.subkey(1).expirationTime() == time_t(0));
 
         auto ctx = Context::createForProtocol(key.protocol());
         QVERIFY (ctx);
         TestPassphraseProvider provider;
         ctx->setPassphraseProvider(&provider);
         ctx->setPinentryMode(Context::PinentryLoopback);
 
         // change expiration of the main key
         QVERIFY(!ctx->setExpire(key, 1000));
         delete ctx;
         key.update();
 
         QVERIFY (key.subkey(0).expirationTime() != time_t(0));
         QVERIFY (key.subkey(1).expirationTime() == time_t(0));
         time_t keyExpiration = key.subkey(0).expirationTime();
 
         // change expiration of all subkeys
         ctx = Context::createForProtocol(key.protocol());
         QVERIFY(!ctx->setExpire(key, 2000, std::vector<Subkey>(), Context::SetExpireAllSubkeys));
         delete ctx;
         key.update();
 
         QVERIFY (key.subkey(0).expirationTime() == keyExpiration);
         QVERIFY (key.subkey(1).expirationTime() != time_t(0));
         time_t subkeyExpiration = key.subkey(1).expirationTime();
 
         // change expiration of specific subkey(s)
         ctx = Context::createForProtocol(key.protocol());
         std::vector<Subkey> specificSubkeys;
         specificSubkeys.push_back(key.subkey(1));
         QVERIFY(!ctx->setExpire(key, 3000, specificSubkeys));
         delete ctx;
         key.update();
 
         QVERIFY (key.subkey(0).expirationTime() == keyExpiration);
         QVERIFY (key.subkey(1).expirationTime() != subkeyExpiration);
 
         // test error handling: calling setExpire() with the primary key as
         // subkey should fail with "subkey <primary key fpr> not found"
         ctx = Context::createForProtocol(key.protocol());
         std::vector<Subkey> primaryKey;
         primaryKey.push_back(key.subkey(0));
         const auto err = ctx->setExpire(key, 3000, primaryKey);
         QCOMPARE(err.code(), GPG_ERR_NOT_FOUND);
         delete ctx;
     }
 
     void testSignKeyWithoutExpiration()
     {
         Error err;
 
         if (!loopbackSupported()) {
             return;
         }
 
         auto ctx = Context::create(OpenPGP);
         QVERIFY(ctx);
 
         // Get the signing key (alfa@example.net)
         auto seckey = ctx->key("A0FF4590BB6122EDEF6E3C542D727CC768697734", err, true);
         QVERIFY(!err);
         QVERIFY(!seckey.isNull());
 
         // Get the target key (Bob / Bravo Test)
         auto target = ctx->key("D695676BDCEDCC2CDD6152BCFE180B1DA9E3B0B2", err, false);
         QVERIFY(!err);
         QVERIFY(!target.isNull());
         QVERIFY(target.numUserIDs() > 0);
 
         // Create the job
         auto job = std::unique_ptr<SignKeyJob>{openpgp()->signKeyJob()};
         QVERIFY(job);
 
         // Hack in the passphrase provider
         auto jobCtx = Job::context(job.get());
         TestPassphraseProvider provider;
         jobCtx->setPassphraseProvider(&provider);
         jobCtx->setPinentryMode(Context::PinentryLoopback);
 
         // Setup the job
         job->setExportable(true);
         job->setSigningKey(seckey);
         job->setDupeOk(true);
 
         connect(job.get(), &SignKeyJob::result,
                 this, [this] (const GpgME::Error &err2, const QString &, const GpgME::Error &) {
                     Q_EMIT asyncDone();
                     if (err2) {
                         if (err2.code() == GPG_ERR_GENERAL) {
                             QFAIL(qPrintable(QString("The SignKeyJob failed with '%1'.\n"
                                 "Hint: Run with GPGMEPP_INTERACTOR_DEBUG=stderr to debug the edit interaction.").arg(err2.asString())));
                         } else {
                             QFAIL(qPrintable(QString("The SignKeyJob failed with '%1'.").arg(err2.asString())));
                         }
                     }
                 });
 
         job->start(target);
         QSignalSpy spy{this, &TestVarious::asyncDone};
         QVERIFY(spy.wait(QSIGNALSPY_TIMEOUT));
 
         // At this point the signature should have been added.
         target.update();
         const auto keySignature = target.userID(0).signature(target.userID(0).numSignatures() - 1);
         QVERIFY(keySignature.neverExpires());
     }
 
     void testSignKeyWithExpiration()
     {
         Error err;
 
         if (!loopbackSupported()) {
             return;
         }
 
         auto ctx = Context::create(OpenPGP);
         QVERIFY(ctx);
 
         // Get the signing key (alfa@example.net)
         auto seckey = ctx->key("A0FF4590BB6122EDEF6E3C542D727CC768697734", err, true);
         QVERIFY(!err);
         QVERIFY(!seckey.isNull());
 
         // Get the target key (Bob / Bravo Test)
         auto target = ctx->key("D695676BDCEDCC2CDD6152BCFE180B1DA9E3B0B2", err, false);
         QVERIFY(!err);
         QVERIFY(!target.isNull());
         QVERIFY(target.numUserIDs() > 0);
 
         // Create the job
         auto job = std::unique_ptr<SignKeyJob>{openpgp()->signKeyJob()};
         QVERIFY(job);
 
         // Hack in the passphrase provider
         auto jobCtx = Job::context(job.get());
         TestPassphraseProvider provider;
         jobCtx->setPassphraseProvider(&provider);
         jobCtx->setPinentryMode(Context::PinentryLoopback);
 
         // Setup the job
         job->setExportable(true);
         job->setSigningKey(seckey);
         job->setDupeOk(true);
         job->setExpirationDate(QDate{2222, 2, 22});
 
         connect(job.get(), &SignKeyJob::result,
                 this, [this] (const GpgME::Error &err2, const QString &, const GpgME::Error &) {
                     Q_EMIT asyncDone();
                     if (err2) {
                         if (err2.code() == GPG_ERR_GENERAL) {
                             QFAIL(qPrintable(QString("The SignKeyJob failed with '%1'.\n"
                                 "Hint: Run with GPGMEPP_INTERACTOR_DEBUG=stderr to debug the edit interaction.").arg(err2.asString())));
                         } else {
                             QFAIL(qPrintable(QString("The SignKeyJob failed with '%1'.").arg(err2.asString())));
                         }
                     }
                 });
 
         QTest::ignoreMessage(QtWarningMsg, "Expiration of certification has been changed to QDate(\"2106-02-06\")");
 
         job->start(target);
         QSignalSpy spy{this, &TestVarious::asyncDone};
         QVERIFY(spy.wait(QSIGNALSPY_TIMEOUT));
 
         // At this point the signature should have been added.
         target.update();
         const auto keySignature = target.userID(0).signature(target.userID(0).numSignatures() - 1);
         QVERIFY(!keySignature.neverExpires());
-        const auto expirationDate = QDateTime::fromSecsSinceEpoch(keySignature.expirationTime()).date();
+        const auto expirationDate = QDateTime::fromSecsSinceEpoch(uint_least32_t(keySignature.expirationTime())).date();
         QCOMPARE(expirationDate, QDate(2106, 2, 6));  // expiration date is capped at 2106-02-06
     }
 
     void testVersion()
     {
         QVERIFY(EngineInfo::Version("2.1.0") < EngineInfo::Version("2.1.1"));
         QVERIFY(EngineInfo::Version("2.1.10") < EngineInfo::Version("2.1.11"));
         QVERIFY(EngineInfo::Version("2.2.0") > EngineInfo::Version("2.1.19"));
         QVERIFY(EngineInfo::Version("1.0.0") < EngineInfo::Version("2.0.0"));
         QVERIFY(EngineInfo::Version("0.1.0") < EngineInfo::Version("1.0.0"));
         QVERIFY(!(EngineInfo::Version("2.0.0") < EngineInfo::Version("2.0.0")));
         QVERIFY(!(EngineInfo::Version("2.0.0") > EngineInfo::Version("2.0.0")));
         QVERIFY(EngineInfo::Version("3.0.0") > EngineInfo::Version("2.3.20"));
         QVERIFY(EngineInfo::Version("3.0.1") > EngineInfo::Version("3.0.0"));
         QVERIFY(EngineInfo::Version("3.1.0") > EngineInfo::Version("3.0.20"));
 
         QVERIFY(EngineInfo::Version("1.1.1") <= "2.0.0");
         QVERIFY(EngineInfo::Version("1.1.1") <= "1.2.0");
         QVERIFY(EngineInfo::Version("1.1.1") <= "1.1.2");
         QVERIFY(EngineInfo::Version("1.1.1") <= "1.1.1");
         QVERIFY(!(EngineInfo::Version("1.1.1") <= "1.1.0"));
         QVERIFY(!(EngineInfo::Version("1.1.1") <= "1.0.9"));
         QVERIFY(!(EngineInfo::Version("1.1.1") <= "0.9.9"));
 
         QVERIFY(!(EngineInfo::Version("1.1.1") == "2.0.0"));
         QVERIFY(!(EngineInfo::Version("1.1.1") == "1.2.0"));
         QVERIFY(!(EngineInfo::Version("1.1.1") == "1.1.2"));
         QVERIFY(EngineInfo::Version("1.1.1") == "1.1.1");
         QVERIFY(!(EngineInfo::Version("1.1.1") == "1.1.0"));
         QVERIFY(!(EngineInfo::Version("1.1.1") == "1.0.9"));
         QVERIFY(!(EngineInfo::Version("1.1.1") == "0.9.9"));
 
         QVERIFY(EngineInfo::Version("1.1.1") != "2.0.0");
         QVERIFY(EngineInfo::Version("1.1.1") != "1.2.0");
         QVERIFY(EngineInfo::Version("1.1.1") != "1.1.2");
         QVERIFY(!(EngineInfo::Version("1.1.1") != "1.1.1"));
         QVERIFY(EngineInfo::Version("1.1.1") != "1.1.0");
         QVERIFY(EngineInfo::Version("1.1.1") != "1.0.9");
         QVERIFY(EngineInfo::Version("1.1.1") != "0.9.9");
 
         QVERIFY(!(EngineInfo::Version("1.1.1") >= "2.0.0"));
         QVERIFY(!(EngineInfo::Version("1.1.1") >= "1.2.0"));
         QVERIFY(!(EngineInfo::Version("1.1.1") >= "1.1.2"));
         QVERIFY(EngineInfo::Version("1.1.1") >= "1.1.1");
         QVERIFY(EngineInfo::Version("1.1.1") >= "1.1.0");
         QVERIFY(EngineInfo::Version("1.1.1") >= "1.0.9");
         QVERIFY(EngineInfo::Version("1.1.1") >= "0.9.9");
     }
 
     void initTestCase()
     {
         QGpgMETest::initTestCase();
         const QString gpgHome = qgetenv("GNUPGHOME");
         QVERIFY(copyKeyrings(gpgHome, mDir.path()));
         qputenv("GNUPGHOME", mDir.path().toUtf8());
         QFile conf(mDir.path() + QStringLiteral("/gpg.conf"));
         QVERIFY(conf.open(QIODevice::WriteOnly));
         if (GpgME::engineInfo(GpgME::GpgEngine).engineVersion() >= "2.2.18") {
             conf.write("allow-weak-key-signatures");
         }
         conf.close();
     }
 
 private:
     QTemporaryDir mDir;
 };
 
 QTEST_MAIN(TestVarious)
 
 #include "t-various.moc"