/* t-tofuinfo.cpp

    This file is part of qgpgme, the Qt API binding for gpgme
    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 <QDebug>
#include <QTest>
#include <QTemporaryDir>
#include "protocol.h"
#include "tofuinfo.h"
#include "verifyopaquejob.h"
#include "verificationresult.h"
#include "signingresult.h"
#include "keylistjob.h"
#include "keylistresult.h"
#include "qgpgmesignjob.h"
#include "key.h"
#include "t-support.h"
#include <iostream>

using namespace QGpgME;
using namespace GpgME;

static const char testMsg1[] =
"-----BEGIN PGP MESSAGE-----\n"
"\n"
"owGbwMvMwCSoW1RzPCOz3IRxjXQSR0lqcYleSUWJTZOvjVdpcYmCu1+oQmaJIleH\n"
"GwuDIBMDGysTSIqBi1MApi+nlGGuwDeHao53HBr+FoVGP3xX+kvuu9fCMJvl6IOf\n"
"y1kvP4y+8D5a11ang0udywsA\n"
"=Crq6\n"
"-----END PGP MESSAGE-----\n";

class TofuInfoTest: public QObject
{
    Q_OBJECT

    void testTofuCopy(TofuInfo other, const TofuInfo &orig)
    {
        Q_ASSERT(!orig.isNull());
        Q_ASSERT(!other.isNull());
        Q_ASSERT(!strcmp(orig.fingerprint(), other.fingerprint()));
        Q_ASSERT(orig.lastSeen() == other.lastSeen());
        Q_ASSERT(orig.signCount() == other.signCount());
        Q_ASSERT(orig.validity() == other.validity());
        Q_ASSERT(orig.policy() == other.policy());
    }

    void signAndVerify(const QString &what, const GpgME::Key &key, int expected)
    {
        Context *ctx = Context::createForProtocol(OpenPGP);
        ctx->setPassphraseProvider(new TestPassphraseProvider);
        ctx->setPinentryMode(Context::PinentryLoopback);
        auto *job = new QGpgMESignJob(ctx);

        std::vector<Key> keys;
        keys.push_back(key);
        QByteArray signedData;
        auto sigResult = job->exec(keys, what.toUtf8(), NormalSignatureMode, signedData);

        Q_ASSERT(!sigResult.error());

        auto verifyJob = openpgp()->verifyOpaqueJob();
        QByteArray verified;

        auto result = verifyJob->exec(signedData, verified);

        Q_ASSERT(!result.error());
        Q_ASSERT(verified == what.toUtf8());

        Q_ASSERT(result.numSignatures() == 1);
        auto sig = result.signatures()[0];

        Q_FOREACH(const TofuInfo stats, sig.tofuInfo()) {
            Q_ASSERT(!stats.isNull());
            Q_ASSERT(!strcmp(stats.fingerprint(), sig.fingerprint()));
            Q_ASSERT(stats.signCount() == expected);
        }
        /* FIXME: GnuPG-Bug-Id 2405 makes the wait necessary. */
        QTest::qWait(1000);
    }

private:
    QTemporaryDir mDir;

private Q_SLOTS:
    void testTofuNull()
    {
        TofuInfo tofu;
        Q_ASSERT(tofu.isNull());
        Q_ASSERT(!tofu.fingerprint());
        Q_ASSERT(!tofu.address());
        Q_ASSERT(!tofu.description());
        Q_ASSERT(!tofu.signCount());
        Q_ASSERT(!tofu.lastSeen());
        Q_ASSERT(!tofu.firstSeen());
        Q_ASSERT(tofu.validity() == TofuInfo::ValidityUnknown);
        Q_ASSERT(tofu.policy() == TofuInfo::PolicyUnknown);
    }

    void testTofuInfo()
    {
        auto *job = openpgp()->verifyOpaqueJob(true);
        const QByteArray data1(testMsg1);
        QByteArray plaintext;

        auto result = job->exec(data1, plaintext);

        Q_ASSERT(!result.isNull());
        Q_ASSERT(!result.error());
        Q_ASSERT(!strcmp(plaintext.constData(), "Just GNU it!\n"));

        Q_ASSERT(result.numSignatures() == 1);
        Signature sig = result.signatures()[0];
        /* TOFU is always marginal */
        Q_ASSERT(sig.validity() == Signature::Marginal);

        Q_ASSERT(!sig.tofuInfo().empty());
        Q_FOREACH(const TofuInfo stats, sig.tofuInfo()) {
            Q_ASSERT(!stats.isNull());
            Q_ASSERT(!strcmp(stats.fingerprint(), sig.fingerprint()));
            Q_ASSERT(stats.firstSeen() == stats.lastSeen());
            Q_ASSERT(!stats.signCount());
            Q_ASSERT(stats.address());
          /* See issue2405 Comment back in when resolved
            Q_ASSERT(stats.policy() == TofuInfo::PolicyAuto); */
            Q_ASSERT(stats.validity() == TofuInfo::NoHistory);
        }

        const TofuInfo first = sig.tofuInfo()[0];
        testTofuCopy(first, first);

        /* Another verify */

        /* FIXME: GnuPG-Bug-Id 2405 makes the wait necessary. */
        QTest::qWait(1000);
        job = openpgp()->verifyOpaqueJob(true);
        result = job->exec(data1, plaintext);

        Q_ASSERT(!result.isNull());
        Q_ASSERT(!result.error());

        Q_ASSERT(result.numSignatures() == 1);
        sig = result.signatures()[0];
        /* TOFU is always marginal */
        Q_ASSERT(sig.validity() == Signature::Marginal);

        Q_ASSERT(!sig.tofuInfo().empty());
        Q_FOREACH(const TofuInfo stats, sig.tofuInfo()) {
            Q_ASSERT(!stats.isNull());
            Q_ASSERT(!strcmp(stats.fingerprint(), sig.fingerprint()));
            Q_ASSERT(stats.signCount() == 1);
            Q_ASSERT(stats.address());
            Q_ASSERT(stats.policy() == TofuInfo::PolicyAuto);
            Q_ASSERT(stats.validity() == TofuInfo::LittleHistory);
        }

        /* Verify that another call yields the same result */
        job = openpgp()->verifyOpaqueJob(true);
        result = job->exec(data1, plaintext);

        Q_ASSERT(!result.isNull());
        Q_ASSERT(!result.error());

        Q_ASSERT(result.numSignatures() == 1);
        sig = result.signatures()[0];
        /* TOFU is always marginal */
        Q_ASSERT(sig.validity() == Signature::Marginal);

        Q_ASSERT(!sig.tofuInfo().empty());
        Q_FOREACH(const TofuInfo stats, sig.tofuInfo()) {
            Q_ASSERT(!stats.isNull());
            Q_ASSERT(!strcmp(stats.fingerprint(), sig.fingerprint()));
            Q_ASSERT(stats.signCount() == 1);
            Q_ASSERT(stats.address());
            Q_ASSERT(stats.policy() == TofuInfo::PolicyAuto);
            Q_ASSERT(stats.validity() == TofuInfo::LittleHistory);
        }
    }

    void testTofuSignCount()
    {
        auto *job = openpgp()->keyListJob(false, false, false);
        std::vector<GpgME::Key> keys;
        GpgME::KeyListResult result = job->exec(QStringList() << QStringLiteral("zulu@example.net"),
                                                true, keys);
        Q_ASSERT(!keys.empty());
        Key key = keys[0];
        Q_ASSERT(!key.isNull());

        signAndVerify(QStringLiteral("Hello"), key, 0);
        signAndVerify(QStringLiteral("Hello2"), key, 1);
        signAndVerify(QStringLiteral("Hello3"), key, 2);
        signAndVerify(QStringLiteral("Hello4"), key, 3);
    }

    void initTestCase()
    {
        const QString gpgHome = qgetenv("GNUPGHOME");
        QVERIFY2(!gpgHome.isEmpty(), "GNUPGHOME environment variable is not set.");
        qputenv("GNUPGHOME", mDir.path().toUtf8());
        Q_ASSERT(mDir.isValid());
        QFile conf(mDir.path() + QStringLiteral("/gpg.conf"));
        Q_ASSERT(conf.open(QIODevice::WriteOnly));
        conf.write("trust-model tofu+pgp");
        conf.close();
        QFile agentConf(mDir.path() + QStringLiteral("/gpg-agent.conf"));
        Q_ASSERT(agentConf.open(QIODevice::WriteOnly));
        agentConf.write("allow-loopback-pinentry");
        agentConf.close();
        Q_ASSERT(QFile::copy(gpgHome + QStringLiteral("/pubring.gpg"),
                 mDir.path() + QStringLiteral("/pubring.gpg")));
        Q_ASSERT(QFile::copy(gpgHome + QStringLiteral("/secring.gpg"),
                 mDir.path() + QStringLiteral("/secring.gpg")));

    }
};

QTEST_MAIN(TofuInfoTest)

#include "t-tofuinfo.moc"