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
|
/*
*
* D-Bus helper library
*
* Copyright (C) 2004-2011 Marcel Holtmann <marcel@holtmann.org>
*
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <errno.h>
#include <dbus/dbus.h>
#include <glib.h>
int polkit_check_authorization(DBusConnection *conn,
const char *action, gboolean interaction,
void (*function) (dbus_bool_t authorized,
void *user_data),
void *user_data, int timeout);
static void add_dict_with_string_value(DBusMessageIter *iter,
const char *key, const char *str)
{
DBusMessageIter dict, entry, value;
dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY,
DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING
DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
dbus_message_iter_open_container(&dict, DBUS_TYPE_DICT_ENTRY,
NULL, &entry);
dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &key);
dbus_message_iter_open_container(&entry, DBUS_TYPE_VARIANT,
DBUS_TYPE_STRING_AS_STRING, &value);
dbus_message_iter_append_basic(&value, DBUS_TYPE_STRING, &str);
dbus_message_iter_close_container(&entry, &value);
dbus_message_iter_close_container(&dict, &entry);
dbus_message_iter_close_container(iter, &dict);
}
static void add_empty_string_dict(DBusMessageIter *iter)
{
DBusMessageIter dict;
dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY,
DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_STRING_AS_STRING
DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
dbus_message_iter_close_container(iter, &dict);
}
static void add_arguments(DBusConnection *conn, DBusMessageIter *iter,
const char *action, dbus_uint32_t flags)
{
const char *busname = dbus_bus_get_unique_name(conn);
const char *kind = "system-bus-name";
const char *cancel = "";
DBusMessageIter subject;
dbus_message_iter_open_container(iter, DBUS_TYPE_STRUCT,
NULL, &subject);
dbus_message_iter_append_basic(&subject, DBUS_TYPE_STRING, &kind);
add_dict_with_string_value(&subject, "name", busname);
dbus_message_iter_close_container(iter, &subject);
dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING, &action);
add_empty_string_dict(iter);
dbus_message_iter_append_basic(iter, DBUS_TYPE_UINT32, &flags);
dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING, &cancel);
}
static dbus_bool_t parse_result(DBusMessageIter *iter)
{
DBusMessageIter result;
dbus_bool_t authorized, challenge;
dbus_message_iter_recurse(iter, &result);
dbus_message_iter_get_basic(&result, &authorized);
dbus_message_iter_get_basic(&result, &challenge);
return authorized;
}
struct authorization_data {
void (*function) (dbus_bool_t authorized, void *user_data);
void *user_data;
};
static void authorization_reply(DBusPendingCall *call, void *user_data)
{
struct authorization_data *data = user_data;
DBusMessage *reply;
DBusMessageIter iter;
dbus_bool_t authorized = FALSE;
reply = dbus_pending_call_steal_reply(call);
if (dbus_message_get_type(reply) == DBUS_MESSAGE_TYPE_ERROR)
goto done;
if (dbus_message_has_signature(reply, "(bba{ss})") == FALSE)
goto done;
dbus_message_iter_init(reply, &iter);
authorized = parse_result(&iter);
done:
if (data->function != NULL)
data->function(authorized, data->user_data);
dbus_message_unref(reply);
dbus_pending_call_unref(call);
}
#define AUTHORITY_DBUS "org.freedesktop.PolicyKit1"
#define AUTHORITY_INTF "org.freedesktop.PolicyKit1.Authority"
#define AUTHORITY_PATH "/org/freedesktop/PolicyKit1/Authority"
int polkit_check_authorization(DBusConnection *conn,
const char *action, gboolean interaction,
void (*function) (dbus_bool_t authorized,
void *user_data),
void *user_data, int timeout)
{
struct authorization_data *data;
DBusMessage *msg;
DBusMessageIter iter;
DBusPendingCall *call;
dbus_uint32_t flags = 0x00000000;
if (conn == NULL)
return -EINVAL;
data = dbus_malloc0(sizeof(*data));
if (data == NULL)
return -ENOMEM;
msg = dbus_message_new_method_call(AUTHORITY_DBUS, AUTHORITY_PATH,
AUTHORITY_INTF, "CheckAuthorization");
if (msg == NULL) {
dbus_free(data);
return -ENOMEM;
}
if (interaction == TRUE)
flags |= 0x00000001;
if (action == NULL)
action = "org.freedesktop.policykit.exec";
dbus_message_iter_init_append(msg, &iter);
add_arguments(conn, &iter, action, flags);
if (dbus_connection_send_with_reply(conn, msg,
&call, timeout) == FALSE) {
dbus_message_unref(msg);
dbus_free(data);
return -EIO;
}
if (call == NULL) {
dbus_message_unref(msg);
dbus_free(data);
return -EIO;
}
data->function = function;
data->user_data = user_data;
dbus_pending_call_set_notify(call, authorization_reply,
data, dbus_free);
dbus_message_unref(msg);
return 0;
}
|
