Use QSslConfiguration to set-up a SSL connection.

src/mqtt/qmqtt_client.cpp

@@ -43,6 +43,19 @@ QMQTT::Client::Client(const QHostAddress& host,
     d->init(host, port);
 }
 
+#ifndef QT_NO_SSL
+QMQTT::Client::Client(const QString &hostName,
+                      const quint16 port,
+                      const QSslConfiguration &config,
+                      const bool ignoreSelfSigned, QObject *parent)
+    : QObject(parent)
+    , d_ptr(new ClientPrivate(this))
+{
+    Q_D(Client);
+    d->init(hostName, port, config, ignoreSelfSigned);
+}
+#endif // QT_NO_SSL
+
 QMQTT::Client::Client(const QString &hostName,
                       const quint16 port,
                       const bool ssl,

src/mqtt/qmqtt_client.h

@@ -39,6 +39,10 @@
 #include <QScopedPointer>
 #include <QHostAddress>
 
+#ifndef QT_NO_SSL
+QT_FORWARD_DECLARE_CLASS(QSslConfiguration)
+#endif // QT_NO_SSL
+
 namespace QMQTT {
 
 static const quint8 LIBRARY_VERSION_MAJOR = 0;
@@ -116,6 +120,18 @@ class Q_MQTT_EXPORT Client : public QObject
            const quint16 port = 1883,
            QObject* parent = NULL);
 
+#ifndef QT_NO_SSL
+    Client(const QString& hostName,
+           const quint16 port,
+           const QSslConfiguration& config,
+           const bool ignoreSelfSigned=false,
+           QObject* parent = NULL);
+#endif // QT_NO_SSL
+
+    // This function is provided for backward compatibility with older versions of QMQTT.
+    // If the ssl parameter is true, this function will load a private key ('cert.key') and a local
+    // certificate ('cert.crt') from the current working directory. It will also set PeerVerifyMode
+    // to None. This may not be the safest way to set up a SSL connection.
     Client(const QString& hostName,
            const quint16 port,
            const bool ssl,

src/mqtt/qmqtt_client_p.cpp

@@ -34,6 +34,11 @@
 #include "qmqtt_message.h"
 #include <QLoggingCategory>
 #include <QUuid>
+#ifndef QT_NO_SSL
+#include <QFile>
+#include <QSslConfiguration>
+#include <QSslKey>
+#endif // QT_NO_SSL
 
 Q_LOGGING_CATEGORY(client, "qmqtt.client")
 
@@ -61,51 +66,62 @@ QMQTT::ClientPrivate::~ClientPrivate()
 
 void QMQTT::ClientPrivate::init(const QHostAddress& host, const quint16 port, NetworkInterface* network)
 {
-    Q_Q(Client);
-
     _host = host;
     _port = port;
     if(network == NULL)
     {
-        _network.reset(new Network);
+        init(new Network);
     }
     else
     {
-        _network.reset(network);
+        init(network);
     }
-
-    initializeErrorHash();
-
-    QObject::connect(&_timer, &QTimer::timeout, q, &Client::onTimerPingReq);
-    QObject::connect(_network.data(), &Network::connected,
-                     q, &Client::onNetworkConnected);
-    QObject::connect(_network.data(), &Network::disconnected,
-                     q, &Client::onNetworkDisconnected);
-    QObject::connect(_network.data(), &Network::received,
-                     q, &Client::onNetworkReceived);
-    QObject::connect(_network.data(), &Network::error,
-                     q, &Client::onNetworkError);
 }
 
-void QMQTT::ClientPrivate::init(const QString& hostName, const quint16 port, const bool ssl, const bool ignoreSelfSigned)
+#ifndef QT_NO_SSL
+void QMQTT::ClientPrivate::init(const QString& hostName, const quint16 port,
+                                const QSslConfiguration &config, const bool ignoreSelfSigned)
 {
-    Q_Q(Client);
+    _hostName = hostName;
+    _port = port;
+    init(new SslNetwork(config, ignoreSelfSigned));
+}
+#endif // QT_NO_SSL
 
+void QMQTT::ClientPrivate::init(const QString& hostName, const quint16 port, const bool ssl,
+                                const bool ignoreSelfSigned)
+{
     _hostName = hostName;
     _port = port;
     if (ssl)
     {
 #ifndef QT_NO_SSL
-        _network.reset(new SslNetwork(ignoreSelfSigned));
+        QSslConfiguration sslConf = QSslConfiguration::defaultConfiguration();
+        QList<QSslCertificate> certs = QSslCertificate::fromPath(QStringLiteral("./cert.crt"));
+        if (!certs.isEmpty())
+            sslConf.setLocalCertificate(certs.first());
+        QFile file(QStringLiteral("./cert.key"));
+        if (file.open(QIODevice::ReadOnly)) {
+            sslConf.setPrivateKey(QSslKey(file.readAll(), QSsl::Rsa));
+        }
+        sslConf.setPeerVerifyMode(QSslSocket::VerifyNone);
+        init(hostName, port, sslConf, ignoreSelfSigned);
 #else
         Q_UNUSED(ignoreSelfSigned)
         qCritical() << "SSL not supported in this QT build";
 #endif // QT_NO_SSL
     }
     else
     {
-        _network.reset(new Network);
+        init(new Network);
     }
+}
+
+void QMQTT::ClientPrivate::init(NetworkInterface* network)
+{
+    Q_Q(Client);
+
+    _network.reset(network);
 
     initializeErrorHash();
 

src/mqtt/qmqtt_client_p.h

@@ -38,6 +38,10 @@
 #include "qmqtt_ssl_network_p.h"
 #include <QTimer>
 
+#ifndef QT_NO_SSL
+QT_FORWARD_DECLARE_CLASS(QSslConfiguration)
+#endif // QT_NO_SSL
+
 namespace QMQTT {
 
 class ClientPrivate
@@ -47,7 +51,12 @@ class ClientPrivate
     ~ClientPrivate();
 
     void init(const QHostAddress& host, const quint16 port, NetworkInterface* network = NULL);
+#ifndef QT_NO_SSL
+    void init(const QString& hostName, const quint16 port, const QSslConfiguration& config,
+              const bool ignoreSelfSigned=false);
+#endif // QT_NO_SSL
     void init(const QString& hostName, const quint16 port, const bool ssl, const bool ignoreSelfSigned);
+    void init(NetworkInterface* network);
 
     QHostAddress _host;
     QString _hostName;

src/mqtt/qmqtt_ssl_network.cpp

@@ -42,14 +42,14 @@ const quint16 DEFAULT_PORT = 8883;
 const bool DEFAULT_AUTORECONNECT = false;
 const int DEFAULT_AUTORECONNECT_INTERVAL_MS = 5000;
 
-QMQTT::SslNetwork::SslNetwork(bool ignoreSelfSigned, QObject* parent)
+QMQTT::SslNetwork::SslNetwork(const QSslConfiguration &config, bool ignoreSelfSigned, QObject* parent)
     : NetworkInterface(parent)
     , _port(DEFAULT_PORT)
     , _hostName(DEFAULT_HOST_NAME)
     , _autoReconnect(DEFAULT_AUTORECONNECT)
     , _autoReconnectInterval(DEFAULT_AUTORECONNECT_INTERVAL_MS)
     , _bytesRemaining(0)
-    , _socket(new QMQTT::SslSocket(ignoreSelfSigned))
+    , _socket(new QMQTT::SslSocket(config, ignoreSelfSigned))
     , _autoReconnectTimer(new QMQTT::Timer)
 {
     initialize();

src/mqtt/qmqtt_ssl_network_p.h

@@ -44,6 +44,8 @@
 
 #ifndef QT_NO_SSL
 
+QT_FORWARD_DECLARE_CLASS(QSslConfiguration)
+
 namespace QMQTT {
 
 class SocketInterface;
@@ -54,7 +56,7 @@ class SslNetwork : public NetworkInterface
     Q_OBJECT
 
 public:
-    SslNetwork(bool ignoreSelfSigned, QObject* parent = NULL);
+    SslNetwork(const QSslConfiguration& config, bool ignoreSelfSigned, QObject* parent = NULL);
     SslNetwork(SocketInterface* socketInterface, TimerInterface* timerInterface,
             QObject* parent = NULL);
     ~SslNetwork();

src/mqtt/qmqtt_ssl_socket.cpp

@@ -38,11 +38,12 @@
 
 #ifndef QT_NO_SSL
 
-QMQTT::SslSocket::SslSocket(bool ignoreSelfSigned, QObject* parent)
+QMQTT::SslSocket::SslSocket(const QSslConfiguration &config, bool ignoreSelfSigned, QObject* parent)
     : SocketInterface(parent)
     , _socket(new QSslSocket)
     , _ignoreSelfSigned(ignoreSelfSigned)
 {
+    _socket->setSslConfiguration(config);
     connect(_socket.data(), &QSslSocket::encrypted,    this, &SocketInterface::connected);
     connect(_socket.data(), &QSslSocket::disconnected, this, &SocketInterface::disconnected);
     connect(_socket.data(),
@@ -73,16 +74,9 @@ void QMQTT::SslSocket::connectToHost(const QHostAddress& address, quint16 port)
     emit _socket->error(QAbstractSocket::ConnectionRefusedError);
 }
 
-//put the crt and key file into application running directory
-//todo:set file path on instance if necessary
 void QMQTT::SslSocket::connectToHost(const QString& hostName, quint16 port)
 {
-    QSslConfiguration sslConf = _socket.data()->sslConfiguration();
-    sslConf.setLocalCertificate(QSslCertificate::fromPath(QStringLiteral("./cert.crt")).first());   //LocalCertificate
-    _socket.data()->setSslConfiguration(sslConf);
-    _socket.data()->setPrivateKey(QStringLiteral("./cert.key"));                    //LocalPrivateKey
     _socket->connectToHostEncrypted(hostName, port);
-    _socket.data()->setPeerVerifyMode(QSslSocket::VerifyNone);                      //important
 
     if (!_socket->waitForEncrypted())
     {

src/mqtt/qmqtt_ssl_socket_p.h

@@ -41,6 +41,7 @@
 
 QT_FORWARD_DECLARE_CLASS(QSslSocket)
 QT_FORWARD_DECLARE_CLASS(QSslError)
+QT_FORWARD_DECLARE_CLASS(QSslConfiguration)
 
 namespace QMQTT
 {
@@ -49,7 +50,7 @@ class SslSocket : public SocketInterface
 {
     Q_OBJECT
 public:
-    explicit SslSocket(bool ignoreSelfSigned, QObject* parent = NULL);
+    explicit SslSocket(const QSslConfiguration &config, bool ignoreSelfSigned, QObject* parent = NULL);
     virtual ~SslSocket();
 
     virtual QIODevice *ioDevice();