4 * Copyright (c) 2015 Samsung Electronics Co., Ltd. All rights reserved.
6 * Contact: Yong Yeon Kim <yy9875.kim@samsung.com>
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
23 * This file contains Cynara integration code
25 * @file media-util-cynara.c
26 * @author Jacek Bukarewicz (j.bukarewicz@samsung.com)
35 #include <sys/socket.h>
38 #include <media-util-cynara.h>
39 #include <media-util-dbg.h>
40 #include <media-util-err.h>
41 #include <media-util-ipc.h>
42 #include <media-util-internal.h>
44 #include <cynara-client.h>
45 #include <cynara-session.h>
46 #include <cynara-error.h>
47 #include <cynara-creds-socket.h>
50 /* this definition is missing in glibc headers (version 2.21). It was introduced in kernel version 2.6.17 */
52 #define SCM_SECURITY 0x03
55 static cynara *_cynara = NULL;
56 static cynara_configuration *_p_conf = NULL;
57 G_LOCK_DEFINE_STATIC(cynara_mutex);
59 static void ms_cynara_dbg_err(const char *prefix, int error_code)
61 char error_buffer[256];
63 error_buffer[0] = '\0';
65 err = cynara_strerror(error_code, error_buffer, sizeof(error_buffer));
66 if (err == CYNARA_API_SUCCESS)
67 MSAPI_DBG_ERR("%s: %s", prefix, error_buffer);
69 MSAPI_DBG_ERR("%s: error code %i", prefix, error_code);
72 int ms_cynara_initialize(void)
76 ret = cynara_configuration_create(&_p_conf);
77 if (ret != CYNARA_API_SUCCESS) {
78 ms_cynara_dbg_err("cynara_configuration_create", ret);
79 return MS_MEDIA_ERR_INTERNAL;
81 ret = cynara_configuration_set_cache_size(_p_conf, 100);
82 if (ret != CYNARA_API_SUCCESS) {
83 ms_cynara_dbg_err("cynara_configuration_set_cache_size", ret);
84 return MS_MEDIA_ERR_INTERNAL;
86 ret = cynara_initialize(&_cynara, _p_conf);
87 if (ret != CYNARA_API_SUCCESS) {
88 ms_cynara_dbg_err("cynara_initialize", ret);
89 return MS_MEDIA_ERR_INTERNAL;
92 cynara_configuration_destroy(_p_conf);
94 return MS_MEDIA_ERR_NONE;
97 void ms_cynara_finish(void)
99 cynara_finish(_cynara);
103 int ms_cynara_receive_untrusted_message(int sockfd, ms_comm_msg_s *recv_msg, ms_peer_credentials *credentials)
106 int recv_msg_size = 0;
108 if (!recv_msg || !credentials)
109 return MS_MEDIA_ERR_INVALID_PARAMETER;
111 if ((recv_msg_size = read(sockfd, recv_msg, sizeof(ms_comm_msg_s))) < 0) {
112 if (errno == EWOULDBLOCK) {
113 MSAPI_DBG_ERR("Timeout. Can't try any more");
114 return MS_MEDIA_ERR_SOCKET_RECEIVE_TIMEOUT;
116 MSAPI_DBG_ERR("recv failed");
117 return MS_MEDIA_ERR_SOCKET_RECEIVE;
121 MSAPI_DBG_SLOG("receive msg from [%d] %d, %s", recv_msg->pid, recv_msg->msg_type, recv_msg->msg);
123 if (!(recv_msg->msg_size > 0 && recv_msg->msg_size < MAX_MSG_SIZE)) {
124 MSAPI_DBG_ERR("IPC message is wrong. message size is %d", recv_msg->msg_size);
125 return MS_MEDIA_ERR_INVALID_IPC_MESSAGE;
128 ret = cynara_creds_socket_get_pid(sockfd, &(credentials->pid));
130 MSAPI_DBG_ERR("cynara_creds_socket_get_pid failed");
131 return MS_MEDIA_ERR_INTERNAL;
134 ret = cynara_creds_socket_get_user(sockfd, USER_METHOD_UID, &(credentials->uid));
136 MSAPI_DBG_ERR("cynara_creds_socket_get_user failed");
137 return MS_MEDIA_ERR_INTERNAL;
140 ret = cynara_creds_socket_get_client(sockfd, CLIENT_METHOD_SMACK, &(credentials->smack));
142 MSAPI_DBG_ERR("cynara_creds_socket_get_client failed");
143 return MS_MEDIA_ERR_INTERNAL;
146 // MSAPI_DBG_ERR("cynara_creds_info : P[%d]U[%s]S[%s]", credentials->pid, credentials->uid, credentials->smack);
148 return MS_MEDIA_ERR_NONE;
151 int ms_cynara_receive_untrusted_message_thumb(int sockfd, thumbMsg *recv_msg, ms_peer_credentials *credentials)
155 int recv_msg_size = 0;
156 unsigned char *buf = NULL;
158 if (!recv_msg || !credentials)
159 return MS_MEDIA_ERR_INVALID_PARAMETER;
161 header_size = sizeof(thumbMsg) -(MAX_FILEPATH_LEN * 2) - sizeof(unsigned char *);
162 MS_MALLOC(buf, header_size);
164 if ((recv_msg_size = recv(sockfd, buf, header_size, 0)) < 0) {
165 if (errno == EWOULDBLOCK) {
166 MSAPI_DBG_ERR("Timeout. Can't try any more");
168 return MS_MEDIA_ERR_SOCKET_RECEIVE_TIMEOUT;
170 MSAPI_DBG_ERR("recv failed");
172 return MS_MEDIA_ERR_SOCKET_RECEIVE;
176 memcpy(recv_msg, buf, header_size);
180 if (recv_msg->origin_path_size <= 0) {
182 MSAPI_DBG_ERR("msg->origin_path_size is invalid %d", recv_msg->origin_path_size);
183 return MS_MEDIA_ERR_INVALID_PARAMETER;
186 MS_MALLOC(buf, (unsigned int)(recv_msg->origin_path_size));
188 MSAPI_DBG_STRERROR("malloc failed");
189 return MS_MEDIA_ERR_OUT_OF_MEMORY;
192 if ((recv_msg_size = recv(sockfd, buf, recv_msg->origin_path_size, 0)) < 0) {
194 if (errno == EWOULDBLOCK) {
195 MSAPI_DBG_ERR("Timeout. Can't try any more");
196 return MS_MEDIA_ERR_SOCKET_RECEIVE_TIMEOUT;
198 MSAPI_DBG_ERR("recv failed");
199 return MS_MEDIA_ERR_SOCKET_RECEIVE;
204 SAFE_STRLCPY(recv_msg->org_path, (char*)buf, sizeof(recv_msg->org_path));
207 if (recv_msg->dest_path_size <= 0) {
209 MSAPI_DBG_ERR("msg->origin_path_size is invalid %d", recv_msg->dest_path_size);
210 return MS_MEDIA_ERR_INVALID_PARAMETER;
213 MS_MALLOC(buf, (unsigned int)(recv_msg->dest_path_size));
215 MSAPI_DBG_STRERROR("malloc failed");
216 return MS_MEDIA_ERR_OUT_OF_MEMORY;
219 if ((recv_msg_size = recv(sockfd, buf, recv_msg->dest_path_size, 0)) < 0) {
221 if (errno == EWOULDBLOCK) {
222 MSAPI_DBG_ERR("Timeout. Can't try any more");
223 return MS_MEDIA_ERR_SOCKET_RECEIVE_TIMEOUT;
225 MSAPI_DBG_ERR("recv failed");
226 return MS_MEDIA_ERR_SOCKET_RECEIVE;
231 SAFE_STRLCPY(recv_msg->dst_path, (char*)buf, sizeof(recv_msg->dst_path));
235 ret = cynara_creds_socket_get_pid(sockfd, &(credentials->pid));
237 MSAPI_DBG_ERR("cynara_creds_socket_get_pid failed");
238 return MS_MEDIA_ERR_INTERNAL;
241 ret = cynara_creds_socket_get_user(sockfd, USER_METHOD_UID, &(credentials->uid));
243 MSAPI_DBG_ERR("cynara_creds_socket_get_user failed");
244 return MS_MEDIA_ERR_INTERNAL;
247 ret = cynara_creds_socket_get_client(sockfd, CLIENT_METHOD_SMACK, &(credentials->smack));
249 MSAPI_DBG_ERR("cynara_creds_socket_get_client failed");
250 return MS_MEDIA_ERR_INTERNAL;
253 // MSAPI_DBG_ERR("cynara_creds_info : P[%d]U[%s]S[%s]", credentials->pid, credentials->uid, credentials->smack);
255 return MS_MEDIA_ERR_NONE;
258 int ms_cynara_check(const ms_peer_credentials *creds, const char *privilege)
263 if (!creds || !privilege)
264 return MS_MEDIA_ERR_INVALID_PARAMETER;
266 session = cynara_session_from_pid(creds->pid);
267 if (session == NULL) {
268 MSAPI_DBG_ERR("cynara_session_from_pid failed");
269 return MS_MEDIA_ERR_INTERNAL;
272 G_LOCK(cynara_mutex);
273 result = cynara_check(_cynara, creds->smack, session, creds->uid, privilege);
274 G_UNLOCK(cynara_mutex);
276 if (result != CYNARA_API_ACCESS_ALLOWED)
277 ms_cynara_dbg_err("cynara_check", result);
279 MS_SAFE_FREE(session);
280 return result == CYNARA_API_ACCESS_ALLOWED ? MS_MEDIA_ERR_NONE : MS_MEDIA_ERR_PERMISSION_DENIED;
283 int ms_cynara_enable_credentials_passing(int fd)
285 const int optval = 1;
288 err = setsockopt(fd, SOL_SOCKET, SO_PASSSEC, &optval, sizeof(optval));
290 MSAPI_DBG_ERR("Failed to set SO_PASSSEC socket option");
291 return MS_MEDIA_ERR_SOCKET_INTERNAL;
294 err = setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &optval, sizeof(optval));
296 MSAPI_DBG_ERR("Failed to set SO_PASSCRED socket option");
297 return MS_MEDIA_ERR_SOCKET_INTERNAL;
300 return MS_MEDIA_ERR_NONE;