1 /*
2 * Copyright (C) 2022-2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "permission_adapter.h"
17
18 #include <string>
19 #include <unordered_map>
20 #include <vector>
21
22 #include "accesstoken_kit.h"
23 #include "ipc_sdk.h"
24 #include "ipc_skeleton.h"
25
26 #include "device_auth_defines.h"
27 #include "hc_log.h"
28
29 using namespace std;
30 using namespace OHOS;
31 using namespace OHOS::Security::AccessToken;
32
33 #define PROC_NAME_DEVICE_MANAGER "device_manager"
34 #define PROC_NAME_SOFT_BUS "softbus_server"
35 #define PROC_NAME_DEVICE_SECURITY_LEVEL "dslm_service"
36 #define PROC_NAME_ISHARE "CollaborationFwk"
37
38 static unordered_map<int32_t, vector<string>> g_apiAccessWhitelist = {
39 { IPC_CALL_ID_PROCESS_CREDENTIAL, { PROC_NAME_DEVICE_MANAGER } },
40 { IPC_CALL_ID_DA_AUTH_DEVICE, { PROC_NAME_DEVICE_MANAGER, PROC_NAME_SOFT_BUS } },
41 { IPC_CALL_ID_DA_PROC_DATA, { PROC_NAME_DEVICE_MANAGER, PROC_NAME_SOFT_BUS } },
42 { IPC_CALL_ID_DA_CANCEL_REQUEST, { PROC_NAME_DEVICE_MANAGER, PROC_NAME_SOFT_BUS } },
43 };
44
45 static unordered_map<int32_t, vector<string>> g_apiAccessConfig = {
46 { IPC_CALL_ID_REG_CB, { PROC_NAME_DEVICE_MANAGER } },
47 { IPC_CALL_ID_UNREG_CB, { PROC_NAME_DEVICE_MANAGER } },
48 { IPC_CALL_ID_CREATE_GROUP, { PROC_NAME_DEVICE_MANAGER } },
49 { IPC_CALL_ID_DEL_GROUP, { PROC_NAME_DEVICE_MANAGER } },
50 { IPC_CALL_ID_ADD_GROUP_MEMBER, { PROC_NAME_DEVICE_MANAGER } },
51 { IPC_CALL_ID_DEL_GROUP_MEMBER, { PROC_NAME_DEVICE_MANAGER } },
52 { IPC_CALL_ID_GM_PROC_DATA, { PROC_NAME_DEVICE_MANAGER } },
53 { IPC_CALL_ID_APPLY_REG_INFO, { PROC_NAME_DEVICE_MANAGER } },
54 { IPC_CALL_ID_ADD_MULTI_GROUP_MEMBERS, { PROC_NAME_DEVICE_MANAGER } },
55 { IPC_CALL_ID_DEL_MULTI_GROUP_MEMBERS, { PROC_NAME_DEVICE_MANAGER } },
56 { IPC_CALL_GM_CANCEL_REQUEST, { PROC_NAME_DEVICE_MANAGER } },
57 { IPC_CALL_ID_AUTH_DEVICE, { PROC_NAME_SOFT_BUS, PROC_NAME_DEVICE_MANAGER, PROC_NAME_ISHARE } },
58 { IPC_CALL_ID_GA_PROC_DATA, { PROC_NAME_SOFT_BUS, PROC_NAME_DEVICE_MANAGER, PROC_NAME_ISHARE } },
59 { IPC_CALL_GA_CANCEL_REQUEST, { PROC_NAME_SOFT_BUS, PROC_NAME_DEVICE_MANAGER, PROC_NAME_ISHARE } },
60 { IPC_CALL_ID_GET_PK_INFO_LIST, { PROC_NAME_DEVICE_SECURITY_LEVEL } },
61 };
62
IsProcessAllowAccess(const string & processName,int32_t methodId)63 static bool IsProcessAllowAccess(const string &processName, int32_t methodId)
64 {
65 if (g_apiAccessConfig.find(methodId) == g_apiAccessConfig.end()) {
66 return true;
67 }
68 return find(g_apiAccessConfig[methodId].begin(), g_apiAccessConfig[methodId].end(), processName) !=
69 g_apiAccessConfig[methodId].end();
70 }
71
IsProcessInWhitelist(const string & processName,int32_t methodId)72 static bool IsProcessInWhitelist(const string& processName, int32_t methodId)
73 {
74 if (g_apiAccessWhitelist.find(methodId) == g_apiAccessWhitelist.end()) {
75 return true;
76 }
77 bool ret = find(g_apiAccessWhitelist[methodId].begin(), g_apiAccessWhitelist[methodId].end(), processName) !=
78 g_apiAccessWhitelist[methodId].end();
79 if (!ret) {
80 LOGE("Access Denied: Process(%s) not in access whitlist", processName.c_str());
81 }
82 return ret;
83 }
84
CheckPermission(int32_t methodId)85 int32_t CheckPermission(int32_t methodId)
86 {
87 AccessTokenID tokenId = IPCSkeleton::GetCallingTokenID();
88 ATokenTypeEnum tokenType = AccessTokenKit::GetTokenTypeFlag(tokenId);
89 if (tokenType != TOKEN_NATIVE) {
90 LOGE("Invalid token type: %d", tokenType);
91 return HC_ERROR;
92 }
93 NativeTokenInfo findInfo;
94 if (AccessTokenKit::GetNativeTokenInfo(tokenId, findInfo) != 0) {
95 LOGE("GetNativeTokenInfo failed!");
96 return HC_ERROR;
97 }
98 if ((findInfo.apl != APL_SYSTEM_CORE) && (findInfo.apl != APL_SYSTEM_BASIC)) {
99 LOGE("Check permission(APL3=SYSTEM_CORE or APL2=SYSTEM_BASIC) failed! APL: %d", findInfo.apl);
100 return HC_ERROR;
101 }
102
103 if (!IsProcessInWhitelist(findInfo.processName, methodId)) {
104 LOGE("Check permission(Access Whitelist) failed!");
105 return HC_ERROR;
106 }
107
108 if (!IsProcessAllowAccess(findInfo.processName, methodId)) {
109 LOGE("Check permission(Interface Access List) failed!");
110 return HC_ERROR;
111 }
112 return HC_SUCCESS;
113 }