QMaskGenerator Class
The QMaskGenerator class provides an abstract base for custom 32-bit mask generators. More...
| Header: | #include <QMaskGenerator> |
| qmake: | QT += websockets |
| Since: | Qt 5.3 |
| Inherits: | QObject. |
Public Functions
| QMaskGenerator(QObject * parent = 0) | |
| virtual | ~QMaskGenerator() |
| virtual quint32 | nextMask() = 0 |
| virtual bool | seed() = 0 |
- 31 public functions inherited from QObject
Additional Inherited Members
- 1 property inherited from QObject
- 1 public slot inherited from QObject
- 2 signals inherited from QObject
- 11 static public members inherited from QObject
- 9 protected functions inherited from QObject
Detailed Description
The QMaskGenerator class provides an abstract base for custom 32-bit mask generators.
The WebSockets specification as outlined in RFC 6455 requires that all communication from client to server be masked. This is to prevent malicious scripts from attacking badly behaving proxies. For more information about the importance of good masking, see http://w2spconf.com/2011/papers/websocket.pdf. By default QWebSocket uses the cryptographically insecure qrand() function. The best measure against attacks mentioned in the document above, is to use QWebSocket over a secure connection (wss://). In general, always be careful to not have 3rd party script access to a QWebSocket in your application.
Member Function Documentation
QMaskGenerator::QMaskGenerator(QObject * parent = 0)
Creates a new QMaskGenerator object with the given optional QObject parent.
[virtual] QMaskGenerator::~QMaskGenerator()
Destroys the QMaskGenerator object.
[pure virtual] quint32 QMaskGenerator::nextMask()
Returns a new random 32-bit mask. The randomness depends on the RNG used to created the mask.
[pure virtual] bool QMaskGenerator::seed()
Initializes the QMaskGenerator by seeding the randomizer. When seed() is not called, it depends on the specific implementation of a subclass if a default seed is used or no seed is used at all. Returns true if seeding succeeds, otherwise false.
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