1 /*
2  * Copyright (C) 2016 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 package com.android.server.pm;
18 
19 import android.annotation.UserIdInt;
20 import android.os.UserHandle;
21 import android.util.SparseArray;
22 
23 /**
24  * Manages package names that need special protection.
25  *
26  * TODO: This class should persist the information by itself, and also keeps track of device admin
27  * packages for all users.  Then PMS.isPackageDeviceAdmin() should use it instead of talking
28  * to DPMS.
29  */
30 public class ProtectedPackages {
31     @UserIdInt
32     private int mDeviceOwnerUserId;
33 
34     private String mDeviceOwnerPackage;
35 
36     private SparseArray<String> mProfileOwnerPackages;
37 
38     private final Object mLock = new Object();
39 
40     /**
41      * Sets the device/profile owner information.
42      */
setDeviceAndProfileOwnerPackages( int deviceOwnerUserId, String deviceOwnerPackage, SparseArray<String> profileOwnerPackages)43     public void setDeviceAndProfileOwnerPackages(
44             int deviceOwnerUserId, String deviceOwnerPackage,
45             SparseArray<String> profileOwnerPackages) {
46         synchronized (mLock) {
47             mDeviceOwnerUserId = deviceOwnerUserId;
48             mDeviceOwnerPackage =
49                     (deviceOwnerUserId == UserHandle.USER_NULL) ? null : deviceOwnerPackage;
50             mProfileOwnerPackages = (profileOwnerPackages == null) ? null
51                     : profileOwnerPackages.clone();
52         }
53     }
54 
hasDeviceOwnerOrProfileOwner(int userId, String packageName)55     private boolean hasDeviceOwnerOrProfileOwner(int userId, String packageName) {
56         if (packageName == null) {
57             return false;
58         }
59         synchronized (mLock) {
60             if (mDeviceOwnerPackage != null) {
61                 if ((mDeviceOwnerUserId == userId)
62                         && (packageName.equals(mDeviceOwnerPackage))) {
63                     return true;
64                 }
65             }
66             if (mProfileOwnerPackages != null) {
67                 if (packageName.equals(mProfileOwnerPackages.get(userId))) {
68                     return true;
69                 }
70             }
71         }
72         return false;
73     }
74 
75     /**
76      * Whether a package or the components in a package's enabled state can be changed
77      * by other callers than itself.
78      */
canPackageStateBeChanged(@serIdInt int userId, String packageName)79     public boolean canPackageStateBeChanged(@UserIdInt int userId, String packageName) {
80         return hasDeviceOwnerOrProfileOwner(userId, packageName);
81     }
82 
83     /**
84      * Whether a package's data be cleared.
85      */
canPackageBeWiped(@serIdInt int userId, String packageName)86     public boolean canPackageBeWiped(@UserIdInt int userId, String packageName) {
87         return hasDeviceOwnerOrProfileOwner(userId, packageName);
88     }
89 }
90