Qt SSL Unable to init SSL Context error

JackA

I am trying to connect an SSL client to an SSL server using the Qt SSL classes, but I am getting the error "Unable to init SSL Context". I made my code as easy as possible to figure out what the problem could be. I created the private key and certificate with the following command on my MacOS terminal:
openssl req -x509 -newkey rsa:4096 -keyout privatekey.pem -out certificate.pem -days 365. So it looks like openssl is installed? QSslSocket::supportSsl() also returns true. What do I need to do to make the server and client work so that they can communicate with eachother? My code and output is below. Thank you in advance!

Client:

#include <QSslSocket>
#include <QFile>

int main() {
    QSslSocket* socket = new QSslSocket;
    qDebug() << socket->supportsSsl();

    socket->setProtocol(QSsl::TlsV1_2);
    socket->connectToHostEncrypted("192.168.2.33", 5555, "192.168.2.33");
    if (!socket->waitForEncrypted()) {
        qDebug() << socket->errorString();
        return 0;
    }
    qDebug() << "Encryption succesfull";
    socket->write("Client here");
    qDebug() << "Written to socket";
    while (socket->waitForReadyRead()) {
        qDebug() << "Reading";
        qDebug() << socket->readAll().data();
    }

    qDebug() << "Ending program";
    delete socket;
    return 0;
}

Server:

#include <QTcpServer>
#include <QSslSocket>

int main() {
    QTcpServer* server = new QTcpServer;
    QSslSocket* socket = new QSslSocket;
    qDebug() << socket->supportsSsl();

    socket->setLocalCertificate("/mylocalfolders/certificate.pem");
    socket->setPrivateKey("/mylocalfolders/privatekey.pem",QSsl::Rsa,QSsl::Pem,"secret");
    socket->setProtocol(QSsl::TlsV1_2);
    server->listen(QHostAddress("192.168.2.33"), 5555);

    if(server->waitForNewConnection(-1)) {
        qDebug() << "New connection";
        socket->startServerEncryption();
        if (!socket->waitForEncrypted()) {
            qDebug() << socket->errorString();
            return 0;
        }
        qDebug() << "Encryption succesfull";
        socket->write("Server here");
        qDebug() << "Written to socket";
        while (socket->waitForReadyRead()) {
            qDebug() << "Reading";
            qDebug() << socket->readAll().data();
        }
    }

    qDebug() << "Ending program";
    delete server;
    delete socket;
    return 0;
}

Output client:

true
"The remote host closed the connection"

Output server:

true
New connection
"Unable to init SSL Context"

SGaist

Hi and welcome to devnet,

What version of Qt are you using ?
On what version of macOS ?

JackA

Thank you!
I am using Qt Creator 4.6.1 based on Qt 5.10.1 on macOS High Sierra 10.13.4.

SGaist

I wonder if it's related to QTBUG-59068.

Otherwise, you maybe using a key with the "modern" header which I remember has caused some trouble to another member. Can you show the header of your key ?

JackA

The header of my privatekey.pem is BEGIN ENCRYPTED PRIVATE KEY.

Today I tried to run the code again. Strangely the output is different!!! I am absolutely sure I didn't change something! The output of my server program is now:

true
Ending program

And my client:

true
"Unknown error"

The "Unknown error" appears exactly 30 seconds after I start the client. True and the server output showed up immediately.

SGaist

Update of Qt version ?
Update of OpenSSL ?