1/****************************************************************************
2**
3** Copyright (C) 2017 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtNetwork 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#include "qhstsstore_p.h"
41#include "qhstspolicy.h"
42
43#include "qstandardpaths.h"
44#include "qdatastream.h"
45#include "qbytearray.h"
46#include "qdatetime.h"
47#include "qvariant.h"
48#include "qstring.h"
49#include "qdir.h"
50
51#include <utility>
52
53QT_BEGIN_NAMESPACE
54
55static QString host_name_to_settings_key(const QString &hostName)
56{
57 const QByteArray hostNameAsHex(hostName.toUtf8().toHex());
58 return QString::fromLatin1(hostNameAsHex);
59}
60
61static QString settings_key_to_host_name(const QString &key)
62{
63 const QByteArray hostNameAsUtf8(QByteArray::fromHex(key.toLatin1()));
64 return QString::fromUtf8(hostNameAsUtf8);
65}
66
67QHstsStore::QHstsStore(const QString &dirName)
68 : store(absoluteFilePath(dirName), QSettings::IniFormat)
69{
70 // Disable fallbacks, we do not want to use anything but our own ini file.
71 store.setFallbacksEnabled(false);
72}
73
74QHstsStore::~QHstsStore()
75{
76 synchronize();
77}
78
79QList<QHstsPolicy> QHstsStore::readPolicies()
80{
81 // This function only attempts to read policies, making no decision about
82 // expired policies. It's up to a user (QHstsCache) to mark these policies
83 // for deletion and sync the store later. But we immediately remove keys/values
84 // (if the store isWritable) for the policies that we fail to read.
85 QList<QHstsPolicy> policies;
86
87 beginHstsGroups();
88
89 const QStringList keys = store.childKeys();
90 for (const auto &key : keys) {
91 QHstsPolicy restoredPolicy;
92 if (deserializePolicy(key, restoredPolicy)) {
93 restoredPolicy.setHost(settings_key_to_host_name(key));
94 policies.push_back(std::move(restoredPolicy));
95 } else if (isWritable()) {
96 evictPolicy(key);
97 }
98 }
99
100 endHstsGroups();
101
102 return policies;
103}
104
105void QHstsStore::addToObserved(const QHstsPolicy &policy)
106{
107 observedPolicies.push_back(policy);
108}
109
110void QHstsStore::synchronize()
111{
112 if (!isWritable())
113 return;
114
115 if (observedPolicies.size()) {
116 beginHstsGroups();
117 for (const QHstsPolicy &policy : qAsConst(observedPolicies)) {
118 const QString key(host_name_to_settings_key(policy.host()));
119 // If we fail to write a new, updated policy, we also remove the old one.
120 if (policy.isExpired() || !serializePolicy(key, policy))
121 evictPolicy(key);
122 }
123 observedPolicies.clear();
124 endHstsGroups();
125 }
126
127 store.sync();
128}
129
130bool QHstsStore::isWritable() const
131{
132 return store.isWritable();
133}
134
135QString QHstsStore::absoluteFilePath(const QString &dirName)
136{
137 const QDir dir(dirName.isEmpty() ? QStandardPaths::writableLocation(QStandardPaths::CacheLocation)
138 : dirName);
139 return dir.absoluteFilePath(QLatin1String("hstsstore"));
140}
141
142void QHstsStore::beginHstsGroups()
143{
144 store.beginGroup(QLatin1String("StrictTransportSecurity"));
145 store.beginGroup(QLatin1String("Policies"));
146}
147
148void QHstsStore::endHstsGroups()
149{
150 store.endGroup();
151 store.endGroup();
152}
153
154bool QHstsStore::deserializePolicy(const QString &key, QHstsPolicy &policy)
155{
156 Q_ASSERT(store.contains(key));
157
158 const QVariant data(store.value(key));
159 if (data.isNull() || !data.canConvert<QByteArray>())
160 return false;
161
162 const QByteArray serializedData(data.toByteArray());
163 QDataStream streamer(serializedData);
164 qint64 expiryInMS = 0;
165 streamer >> expiryInMS;
166 if (streamer.status() != QDataStream::Ok)
167 return false;
168 bool includesSubDomains = false;
169 streamer >> includesSubDomains;
170 if (streamer.status() != QDataStream::Ok)
171 return false;
172
173 policy.setExpiry(QDateTime::fromMSecsSinceEpoch(expiryInMS));
174 policy.setIncludesSubDomains(includesSubDomains);
175
176 return true;
177}
178
179bool QHstsStore::serializePolicy(const QString &key, const QHstsPolicy &policy)
180{
181 Q_ASSERT(store.isWritable());
182
183 QByteArray serializedData;
184 QDataStream streamer(&serializedData, QIODevice::WriteOnly);
185 streamer << policy.expiry().toMSecsSinceEpoch();
186 streamer << policy.includesSubDomains();
187
188 if (streamer.status() != QDataStream::Ok)
189 return false;
190
191 store.setValue(key, serializedData);
192 return true;
193}
194
195void QHstsStore::evictPolicy(const QString &key)
196{
197 Q_ASSERT(store.isWritable());
198 if (store.contains(key))
199 store.remove(key);
200}
201
202QT_END_NAMESPACE
203