Problem with creating ssl server using QSslSocket
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Hey there, you might take a look into QtWebServer. This is a plug and play ssl server library that you can use for your own apps. It already has SSL support available and is very easy to use:
https://github.com/cybercatalyst/qtwebserver
It has only Qt as the only dependency, so no other libs required. Here are a bunch of examples:
https://github.com/cybercatalyst/qtwebserver-examples
This example shows you how to set up an SSL server for delivering websites over HTTPS:
https://github.com/cybercatalyst/qtwebserver-examples/tree/master/https -
Yes, I am using QSslSocket in QtWebServer.
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Yes, I am using QSslSocket in QtWebServer.
@cybercatalyst Actually I intended to implement an encryption based secure socket library for using by our Qt users such as QSslSocket. The protocol has implemented and now I want to know how QSslSocket works. After that I want to mimic QSslSocket for using our encryption protocol.
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I have implemented a ssl server using QSslSocket and run it correctly. But I have some problem with it that I couldn't solve them immediately.
I thought that just connecting readyRead() signal to a slot for reading buffer is sufficient to do that but I have recognized that the readyRead() does not emit at all in this situation and I must also use waitForReadyRead() function in my code. But the problem is using this function cause blocking read the buffer. Actually I want to know how I can read buffer when data has arrived without blocking.Bellow is my implemented ssl server:
void SslServer::incomingConnection(qintptr socketDescriptor) { socket = new QSslSocket(this); socket->setProtocol(QSsl::SslV3); connect(socket, SIGNAL(sslErrors(QList<QSslError>)), this, SLOT(showErrors())); connect(socket, SIGNAL(encrypted()), this, SLOT(ready())); connect(socket, SIGNAL(readyRead()), this, SLOT(readChannel())); QByteArray key; QFile KeyFile("server.key"); if(KeyFile.open(QIODevice::ReadOnly)) { key = KeyFile.readAll(); KeyFile.close(); } else { qDebug() << KeyFile.errorString(); } QSslKey sslKey(key, QSsl::Rsa); socket->setPrivateKey(sslKey); // Load server ssl certificate from file QByteArray cert; QFile CertFile("server.csr"); if(CertFile.open(QIODevice::ReadOnly)) { cert = CertFile.readAll(); CertFile.close(); } else { qDebug() << CertFile.errorString(); } QSslCertificate sslCert(cert); socket->setLocalCertificate(sslCert); QSslConfiguration cfg = socket->sslConfiguration(); cfg.caCertificates(); if (!socket->setSocketDescriptor(socketDescriptor))ee { qDebug() << ("! Couldn't set socket descriptor"); delete socket; return; } socket->startServerEncryption(); if(!socket->waitForEncrypted(3000)) { qDebug("Wait for encrypted!!!!"); return; } while (true) { socket->waitForReadyRead(); } } void SslServer::readChannel() { QByteArray qstrbytes = socket->readLine(); qDebug() << qstrbytes; } void SslServer::ready() { qDebug() << "Encrypted"; }Stupid question, but do you have an event loop running?
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Stupid question, but do you have an event loop running?
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The event loop is not needed for multi-threading, but is needed for signal and slots. You should check the documentation regarding this, but usually it involves creating a Q(Core)Application object in the main function and call the
runfunction. -
I have found the problem when I implement another client/server but this time with QTcpSocket. I dont know exactly why but I guess the problem is because of using socketDescriptor for creating a QSslSocket. When I created client and server with QTcpSocket they works perfectly without any event loop and only by connecting readyRead() signal to an slot. After that in order to testing some situation I have create QTcpSocket using socketDescriptor. Then I found the problem is from creating socket using socketDescriptor because this time the readyRead() signal doesn't work as before.
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I have found the problem when I implement another client/server but this time with QTcpSocket. I dont know exactly why but I guess the problem is because of using socketDescriptor for creating a QSslSocket. When I created client and server with QTcpSocket they works perfectly without any event loop and only by connecting readyRead() signal to an slot. After that in order to testing some situation I have create QTcpSocket using socketDescriptor. Then I found the problem is from creating socket using socketDescriptor because this time the readyRead() signal doesn't work as before.
Are you sure there are no SSL errors?
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Are you sure there are no SSL errors?
