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
|
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright (C) 2013 Red Hat, Inc.
*/
/**
* SECTION:nm-auth-subject
* @short_description: Encapsulates authentication information about a requestor
*
* #NMAuthSubject encpasulates identifying information about an entity that
* makes requests, like process identifier and user UID.
*/
#include <config.h>
#include <glib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#if WITH_POLKIT
#include <polkit/polkit.h>
#endif
#include "nm-auth-subject.h"
#include "nm-dbus-manager.h"
G_DEFINE_TYPE (NMAuthSubject, nm_auth_subject, G_TYPE_OBJECT)
#define NM_AUTH_SUBJECT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_AUTH_SUBJECT, NMAuthSubjectPrivate))
typedef struct {
gulong pid;
gulong uid;
char *dbus_sender;
#if WITH_POLKIT
PolkitSubject *pk_subject;
#endif
} NMAuthSubjectPrivate;
static NMAuthSubject *
_new_common (DBusGMethodInvocation *context,
DBusConnection *connection,
DBusMessage *message,
gboolean internal)
{
NMAuthSubject *subject;
NMAuthSubjectPrivate *priv;
NMDBusManager *dbus_mgr;
gboolean success = FALSE;
g_return_val_if_fail (context || (connection && message) || internal, NULL);
if (internal)
g_return_val_if_fail (context == NULL && connection == NULL && message == NULL, NULL);
subject = NM_AUTH_SUBJECT (g_object_new (NM_TYPE_AUTH_SUBJECT, NULL));
priv = NM_AUTH_SUBJECT_GET_PRIVATE (subject);
dbus_mgr = nm_dbus_manager_get ();
if (internal) {
priv->uid = 0;
priv->pid = 0;
return subject;
}
if (context) {
success = nm_dbus_manager_get_caller_info (dbus_mgr,
context,
&priv->dbus_sender,
&priv->uid,
&priv->pid);
} else if (message) {
success = nm_dbus_manager_get_caller_info_from_message (dbus_mgr,
connection,
message,
&priv->dbus_sender,
&priv->uid,
&priv->pid);
} else
g_assert_not_reached ();
if (!success) {
g_object_unref (subject);
return NULL;
}
g_assert (priv->dbus_sender);
g_assert_cmpuint (priv->pid, !=, 0);
#if WITH_POLKIT
/* FIXME: should we use polkit_unix_session_new() to store the session ID
* of a short-lived process, so that the process can exit but we can still
* ask that user for authorization?
*/
priv->pk_subject = polkit_unix_process_new_for_owner (priv->pid, 0, priv->uid);
if (!priv->pk_subject)
return NULL;
#endif
return subject;
}
NMAuthSubject *
nm_auth_subject_new_from_context (DBusGMethodInvocation *context)
{
return _new_common (context, NULL, NULL, FALSE);
}
NMAuthSubject *
nm_auth_subject_new_from_message (DBusConnection *connection,
DBusMessage *message)
{
return _new_common (NULL, connection, message, FALSE);
}
/**
* nm_auth_subject_new_internal():
*
* Creates a new auth subject representing the NetworkManager process itself.
*
* Returns: the new #NMAuthSubject
*/
NMAuthSubject *
nm_auth_subject_new_internal (void)
{
return _new_common (NULL, NULL, NULL, TRUE);
}
/**************************************************************/
gulong
nm_auth_subject_get_uid (NMAuthSubject *subject)
{
return NM_AUTH_SUBJECT_GET_PRIVATE (subject)->uid;
}
gulong
nm_auth_subject_get_pid (NMAuthSubject *subject)
{
return NM_AUTH_SUBJECT_GET_PRIVATE (subject)->pid;
}
const char *
nm_auth_subject_get_dbus_sender (NMAuthSubject *subject)
{
return NM_AUTH_SUBJECT_GET_PRIVATE (subject)->dbus_sender;
}
gboolean
nm_auth_subject_get_internal (NMAuthSubject *subject)
{
/* internal requests will have no dbus sender */
return NM_AUTH_SUBJECT_GET_PRIVATE (subject)->dbus_sender ? FALSE : TRUE;
}
#if WITH_POLKIT
PolkitSubject *
nm_auth_subject_get_polkit_subject (NMAuthSubject *subject)
{
return NM_AUTH_SUBJECT_GET_PRIVATE (subject)->pk_subject;
}
#endif
/******************************************************************/
static void
nm_auth_subject_init (NMAuthSubject *self)
{
NMAuthSubjectPrivate *priv = NM_AUTH_SUBJECT_GET_PRIVATE (self);
priv->pid = G_MAXULONG;
priv->uid = G_MAXULONG;
}
static void
finalize (GObject *object)
{
NMAuthSubjectPrivate *priv = NM_AUTH_SUBJECT_GET_PRIVATE (object);
g_free (priv->dbus_sender);
#if WITH_POLKIT
if (priv->pk_subject)
g_object_unref (priv->pk_subject);
#endif
G_OBJECT_CLASS (nm_auth_subject_parent_class)->finalize (object);
}
static void
nm_auth_subject_class_init (NMAuthSubjectClass *config_class)
{
GObjectClass *object_class = G_OBJECT_CLASS (config_class);
g_type_class_add_private (config_class, sizeof (NMAuthSubjectPrivate));
/* virtual methods */
object_class->finalize = finalize;
}
|
