1/****************************************************************************
2**
3** Copyright (C) 2016 Kurt Pattyn <pattyn.kurt@gmail.com>.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtWebSockets module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40/*!
41 \class QMaskGenerator
42
43 \inmodule QtWebSockets
44 \since 5.3
45
46 \brief The QMaskGenerator class provides an abstract base for custom 32-bit mask generators.
47
48 The WebSockets specification as outlined in \l {RFC 6455}
49 requires that all communication from client to server be masked. This is to prevent
50 malicious scripts from attacking badly behaving proxies.
51 For more information about the importance of good masking,
52 see \l {"Talking to Yourself for Fun and Profit" by Lin-Shung Huang et al}.
53 By default QWebSocket uses the reasonably secure QRandomGenerator::global()->generate() function.
54 The best measure against attacks mentioned in the document above,
55 is to use QWebSocket over a secure connection (\e wss://).
56 In general, always be careful to not have 3rd party script access to
57 a QWebSocket in your application.
58*/
59
60/*!
61 \fn bool QMaskGenerator::seed()
62
63 Initializes the QMaskGenerator by seeding the randomizer.
64 When seed() is not called, it depends on the specific implementation of a subclass if
65 a default seed is used or no seed is used at all.
66 Returns \e true if seeding succeeds, otherwise false.
67*/
68
69/*!
70 \fn quint32 QMaskGenerator::nextMask()
71
72 Returns a new random 32-bit mask. The randomness depends on the RNG used to created the
73 mask.
74*/
75
76#include "qmaskgenerator.h"
77
78QT_BEGIN_NAMESPACE
79
80/*!
81 Creates a new QMaskGenerator object with the given optional QObject \a parent.
82 */
83QMaskGenerator::QMaskGenerator(QObject *parent) :
84 QObject(parent)
85{
86}
87
88/*!
89 Destroys the QMaskGenerator object.
90 */
91QMaskGenerator::~QMaskGenerator()
92{}
93
94QT_END_NAMESPACE
95

source code of qtwebsockets/src/websockets/qmaskgenerator.cpp