/*
 * Copyright (C) 2008-2021 The QXmpp developers
 *
 * Author:
 *  Jeremy Lainé
 *
 * Source:
 *  https://github.com/qxmpp-project/qxmpp
 *
 * This file is a part of QXmpp library.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 */

#include "QXmppSasl_p.h"

#include "util.h"
#include <QObject>

class tst_QXmppSasl : public QObject
{
    Q_OBJECT

private slots:
    void testParsing();
    void testAuth_data();
    void testAuth();
    void testChallenge_data();
    void testChallenge();
    void testFailure();
    void testResponse_data();
    void testResponse();
    void testSuccess();

    // client
    void testClientAvailableMechanisms();
    void testClientBadMechanism();
    void testClientAnonymous();
    void testClientDigestMd5();
    void testClientDigestMd5_data();
    void testClientFacebook();
    void testClientGoogle();
    void testClientPlain();
    void testClientScramSha1();
    void testClientScramSha1_bad();
    void testClientScramSha256();
    void testClientWindowsLive();

    // server
    void testServerBadMechanism();
    void testServerAnonymous();
    void testServerDigestMd5();
    void testServerPlain();
    void testServerPlainChallenge();
};

void tst_QXmppSasl::testParsing()
{
    // empty
    QMap<QByteArray, QByteArray> empty = QXmppSaslDigestMd5::parseMessage(QByteArray());
    QCOMPARE(empty.size(), 0);
    QCOMPARE(QXmppSaslDigestMd5::serializeMessage(empty), QByteArray());

    // non-empty
    const QByteArray bytes("number=12345,quoted_plain=\"quoted string\",quoted_quote=\"quoted\\\\slash\\\"quote\",string=string");

    QMap<QByteArray, QByteArray> map = QXmppSaslDigestMd5::parseMessage(bytes);
    QCOMPARE(map.size(), 4);
    QCOMPARE(map["number"], QByteArray("12345"));
    QCOMPARE(map["quoted_plain"], QByteArray("quoted string"));
    QCOMPARE(map["quoted_quote"], QByteArray("quoted\\slash\"quote"));
    QCOMPARE(map["string"], QByteArray("string"));
    QCOMPARE(QXmppSaslDigestMd5::serializeMessage(map), bytes);
}

void tst_QXmppSasl::testAuth_data()
{
    QTest::addColumn<QByteArray>("xml");
    QTest::addColumn<QString>("mechanism");
    QTest::addColumn<QByteArray>("value");

    QTest::newRow("plain")
        << QByteArray("<auth xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\" mechanism=\"PLAIN\">AGZvbwBiYXI=</auth>")
        << "PLAIN" << QByteArray("\0foo\0bar", 8);

    QTest::newRow("digest-md5")
        << QByteArray("<auth xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\" mechanism=\"DIGEST-MD5\"/>")
        << "DIGEST-MD5" << QByteArray();
}

void tst_QXmppSasl::testAuth()
{
    QFETCH(QByteArray, xml);
    QFETCH(QString, mechanism);
    QFETCH(QByteArray, value);

    // no condition
    QXmppSaslAuth auth;
    parsePacket(auth, xml);
    QCOMPARE(auth.mechanism(), mechanism);
    QCOMPARE(auth.value(), value);
    serializePacket(auth, xml);
}

void tst_QXmppSasl::testChallenge_data()
{
    QTest::addColumn<QByteArray>("xml");
    QTest::addColumn<QByteArray>("value");

    QTest::newRow("empty")
        << QByteArray("<challenge xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\"/>")
        << QByteArray();

    QTest::newRow("value")
        << QByteArray("<challenge xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">AGZvbwBiYXI=</challenge>")
        << QByteArray("\0foo\0bar", 8);
}

void tst_QXmppSasl::testChallenge()
{
    QFETCH(QByteArray, xml);
    QFETCH(QByteArray, value);

    // no condition
    QXmppSaslChallenge challenge;
    parsePacket(challenge, xml);
    QCOMPARE(challenge.value(), value);
    serializePacket(challenge, xml);
}

void tst_QXmppSasl::testFailure()
{
    // no condition
    const QByteArray xml = "<failure xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\"/>";
    QXmppSaslFailure failure;
    parsePacket(failure, xml);
    QCOMPARE(failure.condition(), QString());
    serializePacket(failure, xml);

    // not authorized
    const QByteArray xml2 = "<failure xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\"><not-authorized/></failure>";
    QXmppSaslFailure failure2;
    parsePacket(failure2, xml2);
    QCOMPARE(failure2.condition(), QLatin1String("not-authorized"));
    serializePacket(failure2, xml2);
}

void tst_QXmppSasl::testResponse_data()
{
    QTest::addColumn<QByteArray>("xml");
    QTest::addColumn<QByteArray>("value");

    QTest::newRow("empty")
        << QByteArray("<response xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\"/>")
        << QByteArray();

    QTest::newRow("value")
        << QByteArray("<response xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">AGZvbwBiYXI=</response>")
        << QByteArray("\0foo\0bar", 8);
}

void tst_QXmppSasl::testResponse()
{
    QFETCH(QByteArray, xml);
    QFETCH(QByteArray, value);

    // no condition
    QXmppSaslResponse response;
    parsePacket(response, xml);
    QCOMPARE(response.value(), value);
    serializePacket(response, xml);
}

void tst_QXmppSasl::testSuccess()
{
    const QByteArray xml = "<success xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\"/>";
    QXmppSaslSuccess stanza;
    parsePacket(stanza, xml);
    serializePacket(stanza, xml);
}

void tst_QXmppSasl::testClientAvailableMechanisms()
{
    const QStringList expectedMechanisms = {
#if QT_VERSION >= QT_VERSION_CHECK(5, 9, 2)
        "SCRAM-SHA3-512",
#endif
        "SCRAM-SHA-512",
        "SCRAM-SHA-256",
        "SCRAM-SHA-1",
        "DIGEST-MD5",
        "PLAIN",
        "ANONYMOUS",
        "X-FACEBOOK-PLATFORM",
        "X-MESSENGER-OAUTH2",
        "X-OAUTH2"
    };

    QCOMPARE(QXmppSaslClient::availableMechanisms(), expectedMechanisms);
}

void tst_QXmppSasl::testClientBadMechanism()
{
    QXmppSaslClient *client = QXmppSaslClient::create("BAD-MECH");
    QVERIFY(client == 0);
}

void tst_QXmppSasl::testClientAnonymous()
{
    QXmppSaslClient *client = QXmppSaslClient::create("ANONYMOUS");
    QVERIFY(client != 0);
    QCOMPARE(client->mechanism(), QLatin1String("ANONYMOUS"));

    // initial step returns nothing
    QByteArray response;
    QVERIFY(client->respond(QByteArray(), response));
    QCOMPARE(response, QByteArray());

    // any further step is an error
    QVERIFY(!client->respond(QByteArray(), response));

    delete client;
}

void tst_QXmppSasl::testClientDigestMd5_data()
{
    QTest::addColumn<QByteArray>("qop");
    QTest::newRow("qop-none") << QByteArray();
    QTest::newRow("qop-auth") << QByteArray(",qop=\"auth\"");
    QTest::newRow("qop-multi") << QByteArray(",qop=\"auth,auth-int\"");
}

void tst_QXmppSasl::testClientDigestMd5()
{
    QFETCH(QByteArray, qop);

    QXmppSaslDigestMd5::setNonce("AMzVG8Oibf+sVUCPPlWLR8lZQvbbJtJB9vJd+u3c6dw=");

    QXmppSaslClient *client = QXmppSaslClient::create("DIGEST-MD5");
    QVERIFY(client != 0);
    QCOMPARE(client->mechanism(), QLatin1String("DIGEST-MD5"));

    client->setUsername("qxmpp1");
    client->setPassword("qxmpp123");
    client->setHost("jabber.ru");
    client->setServiceType("xmpp");

    // initial step returns nothing
    QByteArray response;
    QVERIFY(client->respond(QByteArray(), response));
    QCOMPARE(response, QByteArray());

    QVERIFY(client->respond(QByteArray("nonce=\"2530347127\"") + qop + QByteArray("charset=utf-8,algorithm=md5-sess"), response));
    QCOMPARE(response, QByteArray("charset=utf-8,cnonce=\"AMzVG8Oibf+sVUCPPlWLR8lZQvbbJtJB9vJd+u3c6dw=\",digest-uri=\"xmpp/jabber.ru\",nc=00000001,nonce=2530347127,qop=auth,response=a61fbf4320577d74038b71a8546bc7ae,username=qxmpp1"));

    QVERIFY(client->respond(QByteArray("rspauth=d92bf7f4331700c24799cbab364a14b7"), response));
    QCOMPARE(response, QByteArray());

    // any further step is an error
    QVERIFY(!client->respond(QByteArray(), response));

    delete client;
}

void tst_QXmppSasl::testClientFacebook()
{
    QXmppSaslClient *client = QXmppSaslClient::create("X-FACEBOOK-PLATFORM");
    QVERIFY(client != 0);
    QCOMPARE(client->mechanism(), QLatin1String("X-FACEBOOK-PLATFORM"));

    client->setUsername("123456789012345");
    client->setPassword("abcdefghijlkmno");

    // initial step returns nothing
    QByteArray response;
    QVERIFY(client->respond(QByteArray(), response));
    QCOMPARE(response, QByteArray());

    // challenge response
    QVERIFY(client->respond(QByteArray("version=1&method=auth.xmpp_login&nonce=AA4EFEE16F2AB64B131EEFFE6EACDDB8"), response));
    QCOMPARE(response, QByteArray("access_token=abcdefghijlkmno&api_key=123456789012345&call_id&method=auth.xmpp_login&nonce=AA4EFEE16F2AB64B131EEFFE6EACDDB8&v=1.0"));

    // any further step is an error
    QVERIFY(!client->respond(QByteArray(), response));

    delete client;
}

void tst_QXmppSasl::testClientGoogle()
{
    QXmppSaslClient *client = QXmppSaslClient::create("X-OAUTH2");
    QVERIFY(client != 0);
    QCOMPARE(client->mechanism(), QLatin1String("X-OAUTH2"));

    client->setUsername("foo");
    client->setPassword("bar");

    // initial step returns data
    QByteArray response;
    QVERIFY(client->respond(QByteArray(), response));
    QCOMPARE(response, QByteArray("\0foo\0bar", 8));

    // any further step is an error
    QVERIFY(!client->respond(QByteArray(), response));

    delete client;
}

void tst_QXmppSasl::testClientPlain()
{
    QXmppSaslClient *client = QXmppSaslClient::create("PLAIN");
    QVERIFY(client != 0);
    QCOMPARE(client->mechanism(), QLatin1String("PLAIN"));

    client->setUsername("foo");
    client->setPassword("bar");

    // initial step returns data
    QByteArray response;
    QVERIFY(client->respond(QByteArray(), response));
    QCOMPARE(response, QByteArray("\0foo\0bar", 8));

    // any further step is an error
    QVERIFY(!client->respond(QByteArray(), response));

    delete client;
}

void tst_QXmppSasl::testClientScramSha1()
{
    QXmppSaslDigestMd5::setNonce("fyko+d2lbbFgONRv9qkxdawL");

    QXmppSaslClient *client = QXmppSaslClient::create("SCRAM-SHA-1");
    QVERIFY(client != 0);
    QCOMPARE(client->mechanism(), QLatin1String("SCRAM-SHA-1"));

    client->setUsername("user");
    client->setPassword("pencil");

    // first step
    QByteArray response;
    QVERIFY(client->respond(QByteArray(), response));
    QCOMPARE(response, QByteArray("n,,n=user,r=fyko+d2lbbFgONRv9qkxdawL"));

    // second step
    QVERIFY(client->respond(QByteArray("r=fyko+d2lbbFgONRv9qkxdawL3rfcNHYJY1ZVvWVs7j,s=QSXCR+Q6sek8bf92,i=4096"), response));
    QCOMPARE(response, QByteArray("c=biws,r=fyko+d2lbbFgONRv9qkxdawL3rfcNHYJY1ZVvWVs7j,p=v0X8v3Bz2T0CJGbJQyF0X+HI4Ts="));

    // third step
    QVERIFY(client->respond(QByteArray("v=rmF9pqV8S7suAoZWja4dJRkFsKQ"), response));
    QCOMPARE(response, QByteArray());

    // any further step is an error
    QVERIFY(!client->respond(QByteArray(), response));

    delete client;
}

void tst_QXmppSasl::testClientScramSha1_bad()
{
    QXmppSaslDigestMd5::setNonce("fyko+d2lbbFgONRv9qkxdawL");

    QXmppSaslClient *client = QXmppSaslClient::create("SCRAM-SHA-1");
    QVERIFY(client != 0);
    QCOMPARE(client->mechanism(), QLatin1String("SCRAM-SHA-1"));

    client->setUsername("user");
    client->setPassword("pencil");

    // first step
    QByteArray response;
    QVERIFY(client->respond(QByteArray(), response));
    QCOMPARE(response, QByteArray("n,,n=user,r=fyko+d2lbbFgONRv9qkxdawL"));

    // no nonce
    QVERIFY(!client->respond(QByteArray("s=QSXCR+Q6sek8bf92,i=4096"), response));

    // no salt
    QVERIFY(!client->respond(QByteArray("r=fyko+d2lbbFgONRv9qkxdawL3rfcNHYJY1ZVvWVs7j,i=4096"), response));

    // no iterations
    QVERIFY(!client->respond(QByteArray("r=fyko+d2lbbFgONRv9qkxdawL3rfcNHYJY1ZVvWVs7j,s=QSXCR+Q6sek8bf92"), response));

    delete client;
}

void tst_QXmppSasl::testClientScramSha256()
{
    QXmppSaslDigestMd5::setNonce("rOprNGfwEbeRWgbNEkqO");

    QXmppSaslClient *client = QXmppSaslClient::create("SCRAM-SHA-256");
    QVERIFY(client != 0);
    QCOMPARE(client->mechanism(), QLatin1String("SCRAM-SHA-256"));

    client->setUsername("user");
    client->setPassword("pencil");

    // first step
    QByteArray response;
    QVERIFY(client->respond(QByteArray(), response));
    QCOMPARE(response, QByteArray("n,,n=user,r=rOprNGfwEbeRWgbNEkqO"));

    // second step
    QVERIFY(client->respond(QByteArray("r=rOprNGfwEbeRWgbNEkqO%hvYDpWUa2RaTCAfuxFIlj)hNlF$k0,s=W22ZaJ0SNY7soEsUEjb6gQ==,i=4096"), response));
    QCOMPARE(response, QByteArray("c=biws,r=rOprNGfwEbeRWgbNEkqO%hvYDpWUa2RaTCAfuxFIlj)hNlF$k0,p=dHzbZapWIk4jUhN+Ute9ytag9zjfMHgsqmmiz7AndVQ="));

    // third step
    QVERIFY(client->respond(QByteArray("v=6rriTRBi23WpRR/wtup+mMhUZUn/dB5nLTJRsjl95G4="), response));
    QCOMPARE(response, QByteArray());

    // any further step is an error
    QVERIFY(!client->respond(QByteArray(), response));

    delete client;
}

void tst_QXmppSasl::testClientWindowsLive()
{
    QXmppSaslClient *client = QXmppSaslClient::create("X-MESSENGER-OAUTH2");
    QVERIFY(client != 0);
    QCOMPARE(client->mechanism(), QLatin1String("X-MESSENGER-OAUTH2"));

    client->setPassword(QByteArray("footoken").toBase64());

    // initial step returns data
    QByteArray response;
    QVERIFY(client->respond(QByteArray(), response));
    QCOMPARE(response, QByteArray("footoken", 8));

    // any further step is an error
    QVERIFY(!client->respond(QByteArray(), response));

    delete client;
}

void tst_QXmppSasl::testServerBadMechanism()
{
    QXmppSaslServer *server = QXmppSaslServer::create("BAD-MECH");
    QVERIFY(server == 0);
}

void tst_QXmppSasl::testServerAnonymous()
{
    QXmppSaslServer *server = QXmppSaslServer::create("ANONYMOUS");
    QVERIFY(server != 0);
    QCOMPARE(server->mechanism(), QLatin1String("ANONYMOUS"));

    // initial step returns success
    QByteArray response;
    QCOMPARE(server->respond(QByteArray(), response), QXmppSaslServer::Succeeded);
    QCOMPARE(response, QByteArray());

    // any further step is an error
    QCOMPARE(server->respond(QByteArray(), response), QXmppSaslServer::Failed);

    delete server;
}

void tst_QXmppSasl::testServerDigestMd5()
{
    QXmppSaslDigestMd5::setNonce("OI08/m+QRm6Ma+fKOjuqVXtz40sR5u9/u5GN6sSW0rs=");

    QXmppSaslServer *server = QXmppSaslServer::create("DIGEST-MD5");
    QVERIFY(server != 0);
    QCOMPARE(server->mechanism(), QLatin1String("DIGEST-MD5"));

    // initial step returns challenge
    QByteArray response;
    QCOMPARE(server->respond(QByteArray(), response), QXmppSaslServer::Challenge);
    QCOMPARE(response, QByteArray("algorithm=md5-sess,charset=utf-8,nonce=\"OI08/m+QRm6Ma+fKOjuqVXtz40sR5u9/u5GN6sSW0rs=\",qop=auth"));

    // password needed
    const QByteArray request = QByteArray("charset=utf-8,cnonce=\"AMzVG8Oibf+sVUCPPlWLR8lZQvbbJtJB9vJd+u3c6dw=\",digest-uri=\"xmpp/jabber.ru\",nc=00000001,nonce=\"OI08/m+QRm6Ma+fKOjuqVXtz40sR5u9/u5GN6sSW0rs=\",qop=auth,response=70e9063257ee2bf6bfd108975b917410,username=qxmpp1");
    QCOMPARE(server->respond(request, response), QXmppSaslServer::InputNeeded);
    QCOMPARE(server->username(), QLatin1String("qxmpp1"));
    server->setPassword("qxmpp123");

    // second challenge
    QCOMPARE(server->respond(request, response), QXmppSaslServer::Challenge);
    QCOMPARE(response, QByteArray("rspauth=2821a3add271b9ae02b813bed57ec878"));

    // success
    QCOMPARE(server->respond(QByteArray(), response), QXmppSaslServer::Succeeded);
    QCOMPARE(response, QByteArray());

    // any further step is an error
    QCOMPARE(server->respond(QByteArray(), response), QXmppSaslServer::Failed);

    delete server;
}

void tst_QXmppSasl::testServerPlain()
{
    QXmppSaslServer *server = QXmppSaslServer::create("PLAIN");
    QVERIFY(server != 0);
    QCOMPARE(server->mechanism(), QLatin1String("PLAIN"));

    // initial step returns success
    QByteArray response;
    QCOMPARE(server->respond(QByteArray("\0foo\0bar", 8), response), QXmppSaslServer::InputNeeded);
    QCOMPARE(response, QByteArray());
    QCOMPARE(server->username(), QLatin1String("foo"));
    QCOMPARE(server->password(), QLatin1String("bar"));

    // any further step is an error
    QCOMPARE(server->respond(QByteArray(), response), QXmppSaslServer::Failed);

    delete server;
}

void tst_QXmppSasl::testServerPlainChallenge()
{
    QXmppSaslServer *server = QXmppSaslServer::create("PLAIN");
    QVERIFY(server != 0);
    QCOMPARE(server->mechanism(), QLatin1String("PLAIN"));

    // initial step returns challenge
    QByteArray response;
    QCOMPARE(server->respond(QByteArray(), response), QXmppSaslServer::Challenge);
    QCOMPARE(response, QByteArray());

    // initial step returns success
    QCOMPARE(server->respond(QByteArray("\0foo\0bar", 8), response), QXmppSaslServer::InputNeeded);
    QCOMPARE(response, QByteArray());
    QCOMPARE(server->username(), QLatin1String("foo"));
    QCOMPARE(server->password(), QLatin1String("bar"));

    // any further step is an error
    QCOMPARE(server->respond(QByteArray(), response), QXmppSaslServer::Failed);

    delete server;
}

QTEST_MAIN(tst_QXmppSasl)
#include "tst_qxmppsasl.moc"