QSslConfiguration: toggle on demand loading of root certs properly

make sure we keep track of when we can load root certs and when we
cannot (we cannot when the developer set the certs explicitly). This is
implemented the same way for QSslSocket already, and needs to be
duplicated because we have 2 methods for setting CA certificates: one in
QSslSocket and one in QSslConfiguration.
In addition, adapt the auto test which checks whether setting a default
QSslConfiguration works: There is no way to set on demand loading
through the API, so it should be enabled by default.

Task-number: QTBUG-29103
Change-Id: I5146128aaa385dfcc0ad1e0ef81a92d9350ec5f2
Reviewed-by: Richard J. Moore <rich@kde.org>

src/network/ssl/qsslconfiguration.cpp

@@ -181,6 +181,7 @@ bool QSslConfiguration::operator==(const QSslConfiguration &other) const
         d->protocol == other.d->protocol &&
         d->peerVerifyMode == other.d->peerVerifyMode &&
         d->peerVerifyDepth == other.d->peerVerifyDepth &&
+        d->allowRootCertOnDemandLoading == other.d->allowRootCertOnDemandLoading &&
         d->sslOptions == other.d->sslOptions;
 }
 
@@ -208,6 +209,7 @@ bool QSslConfiguration::isNull() const
     return (d->protocol == QSsl::SecureProtocols &&
             d->peerVerifyMode == QSslSocket::AutoVerifyPeer &&
             d->peerVerifyDepth == 0 &&
+            d->allowRootCertOnDemandLoading == true &&
             d->caCertificates.count() == 0 &&
             d->ciphers.count() == 0 &&
             d->localCertificate.isNull() &&
@@ -519,6 +521,7 @@ QList<QSslCertificate> QSslConfiguration::caCertificates() const
 void QSslConfiguration::setCaCertificates(const QList<QSslCertificate> &certificates)
 {
     d->caCertificates = certificates;
+    d->allowRootCertOnDemandLoading = false;
 }
 
 /*!

src/network/ssl/qsslconfiguration_p.h

@@ -83,6 +83,7 @@ public:
         : protocol(QSsl::SecureProtocols),
           peerVerifyMode(QSslSocket::AutoVerifyPeer),
           peerVerifyDepth(0),
+          allowRootCertOnDemandLoading(true),
           sslOptions(QSslConfigurationPrivate::defaultSslOptions)
     { }
 
@@ -98,6 +99,7 @@ public:
     QSsl::SslProtocol protocol;
     QSslSocket::PeerVerifyMode peerVerifyMode;
     int peerVerifyDepth;
+    bool allowRootCertOnDemandLoading;
 
     QSsl::SslOptions sslOptions;
 

src/network/ssl/qsslsocket.cpp

@@ -903,7 +903,12 @@ void QSslSocket::setSslConfiguration(const QSslConfiguration &configuration)
     d->configuration.peerVerifyMode = configuration.peerVerifyMode();
     d->configuration.protocol = configuration.protocol();
     d->configuration.sslOptions = configuration.d->sslOptions;
-    d->allowRootCertOnDemandLoading = false;
+
+    // if the CA certificates were set explicitly (either via
+    // QSslConfiguration::setCaCertificates() or QSslSocket::setCaCertificates(),
+    // we cannot load the certificates on demand
+    if (!configuration.d->allowRootCertOnDemandLoading)
+        d->allowRootCertOnDemandLoading = false;
 }
 
 /*!
@@ -2378,6 +2383,14 @@ QByteArray QSslSocketPrivate::peek(qint64 maxSize)
     }
 }
 
+/*!
+    \internal
+*/
+bool QSslSocketPrivate::rootCertOnDemandLoadingSupported()
+{
+    return s_loadRootCertsOnDemand;
+}
+
 /*!
     \internal
 */

src/network/ssl/qsslsocket_p.h

@@ -182,6 +182,8 @@ public:
     virtual QSslCipher sessionCipher() const = 0;
     virtual void continueHandshake() = 0;
 
+    Q_AUTOTEST_EXPORT static bool rootCertOnDemandLoadingSupported();
+
 private:
     static bool ensureLibraryLoaded();
     static void ensureCiphersAndCertsLoaded();

tests/auto/network/ssl/qsslsocket_onDemandCertificates_member/tst_qsslsocket_onDemandCertificates_member.cpp

@@ -46,7 +46,10 @@
 #include <QNetworkProxy>
 #include <QAuthenticator>
 
+#ifdef QT_BUILD_INTERNAL
 #include "private/qhostinfo_p.h"
+#include "private/qsslsocket_p.h"
+#endif
 
 #include "../../../network-settings.h"
 
@@ -211,12 +214,31 @@ void tst_QSslSocket_onDemandCertificates_member::onDemandRootCertLoadingMemberMe
     socket3->connectToHostEncrypted(host, 443);
     QVERIFY(!socket3->waitForEncrypted());
 
-    // setting empty SSL configuration explicitly -> should not work
+    // setting empty SSL configuration explicitly -> depends on on-demand loading
     QSslSocketPtr socket4 = newSocket();
     this->socket = socket4.data();
-    socket4->setSslConfiguration(QSslConfiguration());
+    QSslConfiguration conf;
+    socket4->setSslConfiguration(conf);
     socket4->connectToHostEncrypted(host, 443);
-    QVERIFY(!socket4->waitForEncrypted());
+#ifdef QT_BUILD_INTERNAL
+    bool rootCertLoadingAllowed = QSslSocketPrivate::rootCertOnDemandLoadingSupported();
+#if defined(Q_OS_LINUX) || defined (Q_OS_BLACKBERRY)
+    QCOMPARE(rootCertLoadingAllowed, true);
+#elif defined(Q_OS_MAC)
+    QCOMPARE(rootCertLoadingAllowed, false);
+#endif // other platforms: undecided (Windows: depends on the version)
+    // when we allow on demand loading, it is enabled by default,
+    // so on Unix it will work without setting any certificates. Otherwise,
+    // the configuration contains an empty set of certificates
+    // and will fail.
+    bool works;
+#if defined (Q_OS_WIN)
+    works = false; // on Windows, this won't work even though we use on demand loading
+#else
+    works = rootCertLoadingAllowed;
+#endif
+    QCOMPARE(socket4->waitForEncrypted(), works);
+#endif // QT_BUILD_INTERNAL
 }
 
 #endif // QT_NO_OPENSSL

tests/manual/qnetworkreply/main.cpp

@@ -46,8 +46,13 @@
 #include <QtNetwork/qnetworkreply.h>
 #include <QtNetwork/qnetworkrequest.h>
 #include <QtNetwork/qnetworkaccessmanager.h>
+#include <QtNetwork/qsslconfiguration.h>
 #include "../../auto/network-settings.h"
 
+#ifdef QT_BUILD_INTERNAL
+#include "private/qsslsocket_p.h"
+#endif
+
 #define BANDWIDTH_LIMIT_BYTES (1024*100)
 #define TIME_ESTIMATION_SECONDS (97)
 
@@ -58,6 +63,8 @@ private slots:
     void initTestCase();
     void limiting_data();
     void limiting();
+    void setSslConfiguration_data();
+    void setSslConfiguration();
 };
 
 QNetworkReply *reply;
@@ -129,6 +136,42 @@ void tst_qnetworkreply::limiting()
     QVERIFY(!QTestEventLoop::instance().timeout());
 }
 
+void tst_qnetworkreply::setSslConfiguration_data()
+{
+    QTest::addColumn<QUrl>("url");
+    QTest::addColumn<bool>("works");
+
+    QTest::newRow("codereview.qt-project.org") << QUrl("https://codereview.qt-project.org") << true;
+    QTest::newRow("test-server") << QUrl("https://" + QtNetworkSettings::serverName() + "/") << false;
+}
+
+void tst_qnetworkreply::setSslConfiguration()
+{
+    QFETCH(QUrl, url);
+    QNetworkRequest request(url);
+    QSslConfiguration conf = request.sslConfiguration();
+    conf.setProtocol(QSsl::TlsV1_0); // TLS 1.0 will be used anyway, just make sure we change the configuration
+    request.setSslConfiguration(conf);
+    QNetworkAccessManager manager;
+    reply = manager.get(request);
+    QObject::connect(reply, SIGNAL(finished()), &QTestEventLoop::instance(), SLOT(exitLoop()));
+    QTestEventLoop::instance().enterLoop(15);
+    QVERIFY(!QTestEventLoop::instance().timeout());
+#ifdef QT_BUILD_INTERNAL
+    QFETCH(bool, works);
+    bool rootCertLoadingAllowed = QSslSocketPrivate::rootCertOnDemandLoadingSupported();
+#if defined(Q_OS_LINUX) || defined (Q_OS_BLACKBERRY)
+    QCOMPARE(rootCertLoadingAllowed, true);
+#elif defined(Q_OS_MAC)
+    QCOMPARE(rootCertLoadingAllowed, false);
+#endif // other platforms: undecided (Windows: depends on the version)
+    if (works) {
+        QCOMPARE(reply->error(), QNetworkReply::NoError);
+    } else {
+        QCOMPARE(reply->error(), QNetworkReply::SslHandshakeFailedError);
+    }
+#endif
+}
 
 QTEST_MAIN(tst_qnetworkreply)
 

tests/manual/qnetworkreply/qnetworkreply.pro

@@ -2,7 +2,7 @@ TEMPLATE = app
 TARGET = tst_qnetworkreply
 
 QT -= gui
-QT += network testlib
+QT += core-private network network-private testlib
 
 SOURCES += main.cpp
 DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0