1 /*
2 * Copyright (C) 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <mutex>
18 #include <binder/PermissionController.h>
19 #include <binder/Binder.h>
20 #include <binder/IServiceManager.h>
21
22 #include <utils/SystemClock.h>
23
24 namespace android {
25
PermissionController()26 PermissionController::PermissionController()
27 {
28 }
29
getService()30 sp<IPermissionController> PermissionController::getService()
31 {
32 std::lock_guard<Mutex> scoped_lock(mLock);
33 int64_t startTime = 0;
34 sp<IPermissionController> service = mService;
35 while (service == nullptr || !IInterface::asBinder(service)->isBinderAlive()) {
36 sp<IBinder> binder = defaultServiceManager()->checkService(String16("permission"));
37 if (binder == nullptr) {
38 // Wait for the activity service to come back...
39 if (startTime == 0) {
40 startTime = uptimeMillis();
41 ALOGI("Waiting for permission service");
42 } else if ((uptimeMillis() - startTime) > 10000) {
43 ALOGW("Waiting too long for permission service, giving up");
44 service = nullptr;
45 break;
46 }
47 sleep(1);
48 } else {
49 service = interface_cast<IPermissionController>(binder);
50 mService = service;
51 }
52 }
53 return service;
54 }
55
checkPermission(const String16 & permission,int32_t pid,int32_t uid)56 bool PermissionController::checkPermission(const String16& permission, int32_t pid, int32_t uid)
57 {
58 sp<IPermissionController> service = getService();
59 return service != nullptr ? service->checkPermission(permission, pid, uid) : false;
60 }
61
noteOp(const String16 & op,int32_t uid,const String16 & packageName)62 int32_t PermissionController::noteOp(const String16& op, int32_t uid, const String16& packageName)
63 {
64 sp<IPermissionController> service = getService();
65 return service != nullptr ? service->noteOp(op, uid, packageName) : MODE_ERRORED;
66 }
67
getPackagesForUid(const uid_t uid,Vector<String16> & packages)68 void PermissionController::getPackagesForUid(const uid_t uid, Vector<String16> &packages)
69 {
70 sp<IPermissionController> service = getService();
71 if (service != nullptr) {
72 service->getPackagesForUid(uid, packages);
73 }
74 }
75
isRuntimePermission(const String16 & permission)76 bool PermissionController::isRuntimePermission(const String16& permission)
77 {
78 sp<IPermissionController> service = getService();
79 return service != nullptr ? service->isRuntimePermission(permission) : false;
80 }
81
getPackageUid(const String16 & package,int flags)82 int PermissionController::getPackageUid(const String16& package, int flags)
83 {
84 sp<IPermissionController> service = getService();
85 return service != nullptr ? service->getPackageUid(package, flags) : -1;
86 }
87
88 } // namespace android
89