tst_qsslsocket: new bigChunk testcase

This new test is to find out if the BIO size of OpenSSL is limited
or not. The test passes on my Linux, however the OpenSSL docu suggests
that the BIO size is limited.
From http://www.openssl.org/docs/crypto/BIO_s_bio.html
"This is currently 17K".

Reviewed-by: Peter Hartmann

1 files changed, 45 insertions, 0 deletions

diff --git a/tests/auto/qsslsocket/tst_qsslsocket.cpp b/tests/auto/qsslsocket/tst_qsslsocket.cpp
index 6b330e1fd7..2f1c2e2f93 100644
--- a/tests/auto/qsslsocket/tst_qsslsocket.cpp
+++ b/tests/auto/qsslsocket/tst_qsslsocket.cpp
@@ -173,6 +173,7 @@ private slots:
     void disconnectFromHostWhenConnected();
     void resetProxy();
     void readFromClosedSocket();
+    void writeBigChunk();
 
     static void exitLoop()
     {
@@ -1537,6 +1538,50 @@ void tst_QSslSocket::readFromClosedSocket()
     QVERIFY(!socket->bytesToWrite());
 }
 
+void tst_QSslSocket::writeBigChunk()
+{
+    if (!QSslSocket::supportsSsl())
+        return;
+
+    QSslSocketPtr socket = newSocket();
+    this->socket = socket;
+
+    connect(socket, SIGNAL(sslErrors(const QList<QSslError> &)), this, SLOT(ignoreErrorSlot()));
+    socket->connectToHostEncrypted(QtNetworkSettings::serverName(), 443);
+
+    QByteArray data;
+    data.resize(1024*1024*10); // 10 MB
+    // init with garbage. needed so ssl cannot compress it in an efficient way.
+    for (int i = 0; i < data.size() / sizeof(int); i++) {
+        int r = qrand();
+        data.data()[i*sizeof(int)] = r;
+    }
+
+    QVERIFY(socket->waitForEncrypted(10000));
+    QString errorBefore = socket->errorString();
+
+    int ret = socket->write(data.constData(), data.size());
+    QVERIFY(data.size() == ret);
+
+    // spin the event loop once so QSslSocket::transmit() gets called
+    QCoreApplication::processEvents();
+    QString errorAfter = socket->errorString();
+
+    // no better way to do this right now since the error is the same as the default error.
+    if (socket->errorString().startsWith(QLatin1String("Unable to write data")))
+    {
+        qWarning() << socket->error() << socket->errorString();
+        QFAIL("Error while writing! Check if the OpenSSL BIO size is limited?!");
+    }
+    // also check the error string. If another error (than UnknownError) occured, it should be different than before
+    QVERIFY(errorBefore == errorAfter);
+ 
+    // check that everything has been written to OpenSSL
+    QVERIFY(socket->bytesToWrite() == 0);
+
+    socket->close();
+}
+
 #endif // QT_NO_OPENSSL
 
 QTEST_MAIN(tst_QSslSocket)