2 * Copyright (C) 2009 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #ifndef BINDER_PERMISSION_H
18 #define BINDER_PERMISSION_H
23 #include <utils/String16.h>
24 #include <utils/Singleton.h>
25 #include <utils/SortedVector.h>
28 // ---------------------------------------------------------------------------
31 * PermissionCache caches permission checks for a given uid.
33 * Currently the cache is not updated when there is a permission change,
34 * for instance when an application is uninstalled.
36 * IMPORTANT: for the reason stated above, only system permissions are safe
37 * to cache. This restriction may be lifted at a later time.
41 class PermissionCache : Singleton<PermissionCache> {
46 inline bool operator < (const Entry& e) const {
47 return (uid == e.uid) ? (name < e.name) : (uid < e.uid);
51 // we pool all the permission names we see, as many permissions checks
52 // will have identical names
53 SortedVector< String16 > mPermissionNamesPool;
54 // this is our cache per say. it stores pooled names.
55 SortedVector< Entry > mCache;
57 // free the whole cache, but keep the permission name pool
60 status_t check(bool* granted,
61 const String16& permission, uid_t uid) const;
63 void cache(const String16& permission, uid_t uid, bool granted);
68 static bool checkCallingPermission(const String16& permission);
70 static bool checkCallingPermission(const String16& permission,
71 int32_t* outPid, int32_t* outUid);
73 static bool checkPermission(const String16& permission,
74 pid_t pid, uid_t uid);
77 // ---------------------------------------------------------------------------
78 }; // namespace android
80 #endif /* BINDER_PERMISSION_H */