Qt How sent post HTTPS with SSL - c++

Question

Qt How send simple post HTTPS with SSL ?
The program is supposed to send posts via HTTPS using QNetworkAccessManager.
Below is a simple example of my code.
QUrlQuery params;
QByteArray dane;
params.addQueryItem("mWyslijpost", ui->lineEdit->text());
dane.append(params.toString());
QUrl url("https://81.2.244.83/Testpostssl/infotest.php");
QNetworkRequest request(url);
request.setHeader(QNetworkRequest::ContentTypeHeader,"application/x-www-form-urlencoded");
QNetworkReply *reply = manager->post(request, dane);
QFile certFile(":/crt/cert.crt");
Q_ASSERT(certFile.open(QIODevice::ReadOnly));
QSslCertificate cert(&certFile, QSsl::Pem);
QSslSocket * sslSocket = new QSslSocket(this);
sslSocket->addCaCertificate(cert);
sslSocket->connectToHostEncrypted(SERVER, 443);
if (!sslSocket->waitForEncrypted())
{
qDebug() << "Info " << sslSocket->errorString();
return false;
}
QSslConfiguration config = sslSocket->sslConfiguration();
config.setProtocol(QSsl::TlsV1_2);
sslSocket->setSslConfiguration(config);
reply->setSslConfiguration(config);
// wait
QEventLoop elCzekaj;
connect(reply, SIGNAL(finished()), &elCzekaj, SLOT(quit()));
elCzekaj.exec();
if(reply->error() == QNetworkReply::NoError)
{
qDebug() << reply->readAll();
}
else
{
qDebug() << "Error...";
qDebug() << reply->errorString();
}
How to download certificates from server ?
How to configure QSsl ?

Answer 1

To get the cert from the peer try something like this:
QSslSocket *socket = new QSslSocket();
QObject::connect(socket,
&QSslSocket::encrypted,
[=](){qDebug() << socket->peerCertificate() << " cert";}
);
socket->connectToHostEncrypted("stackoverflow.com", 443);
Regarding the question: "How to configure QSsl", that depends on what you want to do. If you simply want to fetch something from a Webserver over TLS, just use the QNetworkAccessManager. The defaults there will do.