1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtAddOn.JsonStream module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "jsonuidrangeauthority.h"
#include "jsonstream.h"
#include <errno.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <pwd.h>
#include <QCoreApplication>
#include <QLocalSocket>
#include <QDebug>
QT_BEGIN_NAMESPACE_JSONSTREAM
/*!
\class JsonUIDRangeAuthority
\brief The JsonUIDRangeAuthority class authorizes clients that fall within a range of UID values.
The JsonUIDRangeAuthority class authorizes Json client connections based on the user ID of the
client. This user ID is read directly from the connected socket. The authorized range
is set with a minimum and maximum value. The range is inclusive; that is, to be authorized the client
must satisfy "minimum <= uid <= maximum". Initially the range is not set; you must set both
minimum and maximum, or all clients will be refused.
The name returned by the JsonUIDRangeAuthority class is the name entry in the /etc/passwd
database. If a name entry does not exist, the JsonUIDRangeAuthority class sets the name equal
to the string form of the uid.
Please note that actual Posix uid_t values are unsigned integers. In theory this means that
we will get into trouble if someone has a UID value greater than about 2000000000.
*/
/*!
\property JsonUIDRangeAuthority::minimum
The minimum valid UID. This must be set to at least 0, or all connections will be refused.
*/
/*!
\property JsonUIDRangeAuthority::maximum
The maximum valid UID. This must be set to at least 0, or all connections will be refused.
*/
/*!
Construct a JsonUIDRangeAuthority with optional \a parent.
*/
JsonUIDRangeAuthority::JsonUIDRangeAuthority(QObject *parent)
: JsonAuthority(parent)
, m_minimum(-1)
, m_maximum(-1)
{
}
/*!
Return the minimum value
*/
int JsonUIDRangeAuthority::minimum() const
{
return m_minimum;
}
/*!
Set the minimum value to \a minimum.
*/
void JsonUIDRangeAuthority::setMinimum(int minimum)
{
if (m_minimum != minimum) {
m_minimum = minimum;
emit minimumChanged();
}
}
/*!
Return the maximum value
*/
int JsonUIDRangeAuthority::maximum() const
{
return m_maximum;
}
/*!
Set the maximum value to \a maximum.
*/
void JsonUIDRangeAuthority::setMaximum(int maximum)
{
if (m_maximum != maximum) {
m_maximum = maximum;
emit maximumChanged();
}
}
/*!
Authorizes the connection from \a stream if and only if the uid
fall within the value range.
Returns an AuthorizationRecord.
*/
AuthorizationRecord JsonUIDRangeAuthority::clientConnected(JsonStream *stream)
{
AuthorizationRecord authRecord;
authRecord.state = JsonAuthority::StateNotAuthorized;
if (!stream)
return authRecord;
QLocalSocket *socket = qobject_cast<QLocalSocket*>(stream->device());
if (!socket)
return authRecord;
if (socket->socketDescriptor() == (quintptr)-1) {
qWarning() << Q_FUNC_INFO << "no socket descriptor available for connection" << socket;
return authRecord;
}
uid_t euid;
#if defined(Q_OS_MAC)
gid_t egid;
if (::getpeereid(socket->socketDescriptor(), &euid, &egid) != 0) {
qWarning() << "getpeereid failed with errcode" << errno << socket->socketDescriptor();
return authRecord;
}
#else
// Check the UIDRange table and return Authorized if appropriate.
struct ucred cr;
socklen_t len = sizeof(struct ucred);
if (::getsockopt(socket->socketDescriptor(), SOL_SOCKET, SO_PEERCRED, &cr, &len) != 0) {
qWarning() << "getsockopt failed with errcode" << errno << socket->socketDescriptor();
return authRecord;
}
euid = cr.uid;
#endif
if (m_minimum >= 0 && m_maximum >= 0 && euid >= (uid_t) m_minimum && euid <= (uid_t) m_maximum) {
struct passwd *passwd = getpwuid(euid);
if (passwd)
authRecord.identifier = QString::fromLatin1(passwd->pw_name);
else
authRecord.identifier = QString::number(euid);
authRecord.state = StateAuthorized;
}
return authRecord;
}
/*!
Ignore any \a message received from \a stream.
*/
AuthorizationRecord JsonUIDRangeAuthority::messageReceived(JsonStream *stream,
const QJsonObject &message)
{
Q_UNUSED(stream);
Q_UNUSED(message);
AuthorizationRecord authRecord;
authRecord.state = JsonAuthority::StateNotAuthorized;
return authRecord;
}
/*!
\fn void JsonUIDRangeAuthority::minimumChanged()
Signal emitted when the minimum value is changed.
*/
/*!
\fn void JsonUIDRangeAuthority::maximumChanged()
Signal emitted when the maximum value is changed.
*/
#include "moc_jsonuidrangeauthority.cpp"
QT_END_NAMESPACE_JSONSTREAM
|
