ProtectedPackages.java revision c29f62c7388f550da2c7368c5dbc0aec7d1564fe 
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
17package com.android.server.pm;
18
19import android.annotation.UserIdInt;
20import android.os.UserHandle;
21import 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 */
30public 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     */
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
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     */
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     */
86    public boolean canPackageBeWiped(@UserIdInt int userId, String packageName) {
87        return hasDeviceOwnerOrProfileOwner(userId, packageName);
88    }
89}
90