aboutsummaryrefslogtreecommitdiffstats
path: root/include/cynara/cynara-creds-gdbus.h
blob: 2334e4545ed3f8ecdeab95116d647088e089cf32 (plain)
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
/*
 *  Copyright (c) 2015 Samsung Electronics Co., Ltd All Rights Reserved
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License
 */
/**
 * @file        src/include/cynara-creds-gdbus.h
 * @author      Jacek Bukarewicz <j.bukarewicz@samsung.com>
 * @author      Oskar Switalski <o.switalski@samsung.com>
 * @version     1.0
 * @brief       This file contains Cynara credentials helper APIs for gdbus clients.
 * @example     cynara-creds-gdbus.example
 */

#ifndef CYNARA_CREDS_GDBUS_H
#define CYNARA_CREDS_GDBUS_H

#include <gio/gio.h>
#include <sys/types.h>

#include <cynara/cynara-creds-commons.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \par Description:
 * Creates a client identification string with given method. Client is a process identified by the
 * unique name at the other side of the dbus connection.
 *
 * \par Purpose:
 * Client identification string is required for cynara_check() and cynara_async_create_request()
 * functions.
 *
 * \par Typical use case:
 * The function is called before the call of cynara_check() or cynara_async_create_request()
 * function. Returned string is used as client parameter in cynara_check() or
 * cynara_async_create_request() function. String is released with g_free() function when it is no
 * longer needed.
 *
 * \par Method of function operation:
 * The function generates client string by calling a method from DBus Interface
 * ("org.freedesktop.DBus") which is placed on system bus ("org.freedesktop.DBus").
 *
 * \par Sync (or) Async:
 * This is a synchronous API.
 *
 * \par Thread safety:
 * This function is NOT thread-safe. If functions from described API are called by multithreaded
 * application from different threads, they must be put into mutex protected critical section.
 *
 * \par Important notes:
 * Memory for returned user string should be freed with g_free().
 * Allocated string is returned only, when function succeeds.
 * If method is CLIENT_METHOD_DEFAULT then it will be chosen based on Cynara configuration file.
 *
 * \param[in] connection DBus connection to a bus. It manages incomming and outgoing messages
 * \param[in] uniqueName DBus identifier of the client
 * \param[in] method Method of client identifier creation
 * \param[out] client Placeholder for allocated string containing client id
 *
 * \return CYNARA_API_SUCCESS on success
 * \return CYNARA_API_INVALID_PARAM when client is NULL or uniqueName or client has wrong
 *                                  value (i.e NULL or non-existing)
 * \return CYNARA_API_CONFIGURATION_ERROR if the configuration file can not be opened or
 *                                        there are errors in configuration file
 * \return CYNARA_API_METHOD_NOT_SUPPORTED when requested method is not supported
 */
int cynara_creds_gdbus_get_client(GDBusConnection *connection, const gchar *uniqueName,
                                  enum cynara_client_creds method, gchar **client);

/**
 * \par Description:
 * Creates a user identification string with given method. User is an executor of process
 * at the other side of socket.
 *
 * \par Purpose:
 * User identification string is required for cynara_check() and cynara_async_create_request()
 * functions.
 *
 * \par Typical use case:
 * The function is called before the call of cynara_check() or cynara_async_create_request()
 * function. Returned string is used as user parameter in cynara_check() or
 * cynara_async_create_request() function. String is released with g_free() function when it is no
 * longer needed.
 *
 * \par Method of function operation:
 * The function generates user string by calling a method from DBus Interface
 * ("org.freedesktop.DBus") which is placed on system bus ("org.freedesktop.DBus").
 *
 * \par Sync (or) Async:
 * This is a synchronous API.
 *
 * \par Thread safety:
 * This function is NOT thread-safe. If functions from described API are called by multithreaded
 * application from different threads, they must be put into mutex protected critical section.
 *
 * \par Important notes:
 * Memory for returned user string should be freed with g_free().
 * Allocated string is returned only, when function succeeds.
 * If method is USER_METHOD_DEFAULT then it will be chosen based on Cynara configuration file.
 *
 * \param[in] connection DBus connection to a bus. It manages incomming and outgoing messages
 * \param[in] uniqueName DBus identifier of the client invoked by the user
 * \param[in] method Method of client identifier creation
 * \param[out] user Placeholder for allocated string containing user id
 *
 * \return CYNARA_API_SUCCESS on success
 * \return CYNARA_API_INVALID_PARAM when user is NULL or connection is not valid DBus connection or
 *                                  uniqueName does not represent a process conected to the DBus
 * \return CYNARA_API_CONFIGURATION_ERROR if the configuration file can not be opened or
 *                                        there are errors in configuration file
 * \return CYNARA_API_METHOD_NOT_SUPPORTED when requested method is not supported
 */
int cynara_creds_gdbus_get_user(GDBusConnection *connection, const gchar *uniqueName,
                                enum cynara_user_creds method, gchar **user);

/**
 * \par Description:
 * Return PID of a process identified by the unique name at the other side of the dbus connection.
 *
 * \par Purpose:
 * PID may be used for client_session creation with cynara_helper_session_from_pid() function
 * from libcynara-helper-session library. Client_session is needed for cynara_check()
 * and cynara_async_create_request() functions.
 *
 * \par Typical use case:
 * The function is called before the call of cynara_helper_session_from_pid() function.
 *
 * \par Method of function operation:
 * The function reads PID of the peer by calling a method from DBus Interface
 * ("org.freedesktop.DBus") which is placed on system bus ("org.freedesktop.DBus")
 * with "GetConnectionUnixProcessID" argument.
 *
 * \par Sync (or) Async:
 * This is a synchronous API.
 *
 * \par Thread safety:
 * This function is NOT thread-safe. If functions from described API are called by multithreaded
 * application from different threads, they must be put into mutex protected critical section.
 *
 * \param[in] connection DBus connection to a bus. It manages incomming and outgoing messages
 * \param[in] uniqueName DBus identifier of the client invoked by the user
 * \param[out] pid Placeholder for PID returned by function
 *
 * \return CYNARA_API_SUCCESS on success
 * \return CYNARA_API_INVALID_PARAM when one of parameters is not valid
 * \return CYNARA_API_UNKNOWN_ERROR when function fails because of unknown error
 */
int cynara_creds_gdbus_get_pid(GDBusConnection *connection, const gchar *uniqueName, pid_t *pid);

#ifdef __cplusplus
}
#endif

#endif /* CYNARA_CREDS_GDBUS_H */