1 /*
2 * Copyright (C) 2021 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 "telephony_permission.h"
17
18 #include "accesstoken_kit.h"
19 #include "bundle_mgr_interface.h"
20 #include "if_system_ability_manager.h"
21 #include "ipc_skeleton.h"
22 #include "iservice_registry.h"
23 #include "privacy_kit.h"
24 #include "system_ability_definition.h"
25 #include "telephony_log_wrapper.h"
26 #include "tokenid_kit.h"
27
28 namespace OHOS {
29 namespace Telephony {
30 using namespace Security::AccessToken;
31
32 /**
33 * @brief Get bundleName by callingUid.
34 * @param callingUid.
35 * @param bundleName.
36 * @return Returns true on success, false on failure.
37 */
GetBundleNameByUid(int32_t uid,std::string & bundleName)38 bool TelephonyPermission::GetBundleNameByUid(int32_t uid, std::string &bundleName)
39 {
40 OHOS::sptr<OHOS::ISystemAbilityManager> systemAbilityManager =
41 OHOS::SystemAbilityManagerClient::GetInstance().GetSystemAbilityManager();
42 if (systemAbilityManager == nullptr) {
43 TELEPHONY_LOGE("systemAbilityManager is nullptr");
44 return false;
45 }
46 OHOS::sptr<OHOS::IRemoteObject> remoteObject =
47 systemAbilityManager->GetSystemAbility(BUNDLE_MGR_SERVICE_SYS_ABILITY_ID);
48
49 sptr<AppExecFwk::IBundleMgr> iBundleMgr = OHOS::iface_cast<AppExecFwk::IBundleMgr>(remoteObject);
50 if (iBundleMgr == nullptr) {
51 TELEPHONY_LOGE("iBundleMgr is nullptr");
52 return false;
53 }
54 std::string identity = IPCSkeleton::ResetCallingIdentity();
55 ErrCode errCode = iBundleMgr->GetNameForUid(uid, bundleName);
56 IPCSkeleton::SetCallingIdentity(identity);
57 if (errCode != ERR_OK) {
58 TELEPHONY_LOGE("get name for uid failed, error code : %{public}d", errCode);
59 return false;
60 }
61 return true;
62 }
63
64 /**
65 * @brief Permission check by callingUid.
66 * @param permissionName permission name.
67 * @return Returns true on success, false on failure.
68 */
CheckPermission(const std::string & permissionName)69 bool TelephonyPermission::CheckPermission(const std::string &permissionName)
70 {
71 if (permissionName.empty()) {
72 TELEPHONY_LOGD("permission check failed, permission name is empty.");
73 return false;
74 }
75
76 auto callerToken = IPCSkeleton::GetCallingTokenID();
77 auto tokenType = AccessTokenKit::GetTokenTypeFlag(callerToken);
78 int result = AccessTokenKit::VerifyAccessToken(callerToken, permissionName);
79
80 if (permissionName == Permission::ANSWER_CALL || permissionName == Permission::READ_CALL_LOG
81 || permissionName == Permission::READ_CONTACTS || permissionName == Permission::WRITE_CONTACTS
82 || permissionName == Permission::SEND_MESSAGES) {
83 if (tokenType == ATokenTypeEnum::TOKEN_HAP) {
84 bool status = result == PermissionState::PERMISSION_GRANTED;
85 int32_t successCount = status ? 1 : 0;
86 int32_t failCount = status ? 0 : 1;
87 int32_t ret = PrivacyKit::AddPermissionUsedRecord(callerToken, permissionName, successCount, failCount);
88 if (ret != 0) {
89 TELEPHONY_LOGD("AddPermissionUsedRecord failed, permission:%{public}s, "
90 "successCount:%{public}d, failCount:%{public}d",
91 permissionName.c_str(), successCount, failCount);
92 }
93 }
94 }
95
96 if (result != PermissionState::PERMISSION_GRANTED) {
97 TELEPHONY_LOGE("permission check failed, permission:%{public}s, callerToken:%{public}u, "
98 "tokenType:%{public}d, pid:%{public}d",
99 permissionName.c_str(), callerToken, tokenType, IPCSkeleton::GetCallingPid());
100 return false;
101 }
102 return true;
103 }
104
CheckCallerIsSystemApp()105 bool TelephonyPermission::CheckCallerIsSystemApp()
106 {
107 auto callerToken = IPCSkeleton::GetCallingTokenID();
108 auto tokenType = AccessTokenKit::GetTokenTypeFlag(callerToken);
109 if (tokenType == Security::AccessToken::ATokenTypeEnum::TOKEN_NATIVE ||
110 tokenType == Security::AccessToken::ATokenTypeEnum::TOKEN_SHELL) {
111 TELEPHONY_LOGD("tokenType check passed.");
112 return true;
113 }
114
115 auto selfToken = IPCSkeleton::GetCallingFullTokenID();
116 return Security::AccessToken::TokenIdKit::IsSystemAppByFullTokenID(selfToken);
117 }
118 } // namespace Telephony
119 } // namespace OHOS
120