1 /*
2 * Copyright (c) 2022 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_manager.h"
17
18 #include "bundle_constants.h"
19 #include "bundle_info.h"
20 #include "bundle_mgr_client.h"
21 #include "bundle_mgr_interface.h"
22 #include "bundle_mgr_proxy.h"
23 #include "if_system_ability_manager.h"
24 #include "iservice_registry.h"
25 #include "system_ability_definition.h"
26 #include "ipc_skeleton.h"
27 #include "access_token.h"
28 #include "hap_token_info.h"
29 #include "native_token_info.h"
30 #include "accesstoken_kit.h"
31 #include "dm_log.h"
32
33 using namespace OHOS::AppExecFwk;
34 using namespace OHOS::AppExecFwk::Constants;
35 using namespace OHOS::Security::AccessToken;
36
37 namespace OHOS {
38 namespace DistributedHardware {
39 IMPLEMENT_SINGLE_INSTANCE(PermissionManager);
40
GetAppId()41 const std::string PermissionManager::GetAppId()
42 {
43 AccessTokenID tokenId = IPCSkeleton::GetCallingTokenID();
44 LOGI("PermissionManager::tokenCaller ID == %d", tokenId);
45 if (AccessTokenKit::GetTokenTypeFlag(tokenId) != TOKEN_HAP) {
46 return "";
47 }
48 HapTokenInfo tokenInfo;
49 auto result = AccessTokenKit::GetHapTokenInfo(tokenId, tokenInfo);
50 if (result != RET_SUCCESS) {
51 LOGE("GetHapTokenInfo, tokenId = %d, result = %d, ", tokenId, result);
52 return "";
53 }
54
55 return tokenInfo.appID;
56 }
57
CheckPermission(void)58 bool PermissionManager::CheckPermission(void)
59 {
60 LOGI("Enter PermissionManager::CheckPermission");
61 AccessTokenID tokenCaller = IPCSkeleton::GetCallingTokenID();
62 if (tokenCaller == 0) {
63 LOGI("PermissionManager::tokenCaller == 0");
64 return false;
65 }
66 LOGI("PermissionManager::tokenCaller ID == %d", tokenCaller);
67
68 ATokenTypeEnum tokenTypeFlag = AccessTokenKit::GetTokenTypeFlag(tokenCaller);
69 if (tokenTypeFlag == ATokenTypeEnum::TOKEN_HAP) {
70 int32_t uid = IPCSkeleton::GetCallingUid();
71 if (uid < 0) {
72 LOGI("app caller uid is: %d,", uid);
73 return false;
74 }
75
76 sptr<ISystemAbilityManager> systemAbilityManager =
77 SystemAbilityManagerClient::GetInstance().GetSystemAbilityManager();
78 if (systemAbilityManager == nullptr) {
79 LOGE("failed to get system ability mgr.");
80 return false;
81 }
82 sptr<IRemoteObject> remoteObject = systemAbilityManager->GetSystemAbility(BUNDLE_MGR_SERVICE_SYS_ABILITY_ID);
83 if (remoteObject == nullptr) {
84 LOGE("failed to get bundle manager proxy.");
85 return false;
86 }
87
88 LOGI("get bundle manager proxy success.");
89 sptr<IBundleMgr> iBundleMgr = iface_cast<IBundleMgr>(remoteObject);
90 if (iBundleMgr == nullptr) {
91 LOGI("iBundleMgr is nullptr, caller may be a process");
92 return false;
93 }
94 LOGI("PermissionManager::tokenTypeFlag is hap process");
95 return iBundleMgr->CheckIsSystemAppByUid(uid);
96 } else if (tokenTypeFlag == ATokenTypeEnum::TOKEN_NATIVE || tokenTypeFlag == ATokenTypeEnum::TOKEN_SHELL) {
97 LOGI("PermissionManager::tokenTypeFlag is native process");
98 return true;
99 } else {
100 LOGI("PermissionManager::invalid tokenTypeFlag");
101 return false;
102 }
103 }
104 } // namespace DistributedHardware
105 } // namespace OHOS
106