1 /*
2  * Copyright (C) 2019 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.packageinstaller.permission.data;
18 
19 import static android.os.UserHandle.getUserHandleForUid;
20 
21 import static com.android.packageinstaller.permission.utils.Utils.FLAGS_ALWAYS_USER_SENSITIVE;
22 
23 import android.app.Application;
24 import android.content.pm.ApplicationInfo;
25 import android.content.pm.PackageManager;
26 import android.os.AsyncTask;
27 import android.os.UserHandle;
28 import android.util.ArrayMap;
29 
30 import androidx.annotation.MainThread;
31 import androidx.annotation.NonNull;
32 import androidx.lifecycle.MediatorLiveData;
33 
34 import java.util.ArrayList;
35 
36 /**
37  * Live data of packages that are not fully user sensitive by default.
38  *
39  * <p>Data source: {@link UidToSensitivityLiveData}
40  */
41 public class NonSensitivePackagesLiveData extends MediatorLiveData<ArrayList<ApplicationInfo>> {
42     private static NonSensitivePackagesLiveData sInstance;
43 
44     /**
45      * Get a (potentially shared) live data.
46      *
47      * @param application The application context
48      *
49      * @return The live data
50      */
51     @MainThread
get(@onNull Application application)52     public static NonSensitivePackagesLiveData get(@NonNull Application application) {
53         if (sInstance == null) {
54             sInstance = new NonSensitivePackagesLiveData(application);
55         }
56 
57         return sInstance;
58     }
59 
NonSensitivePackagesLiveData(@onNull Application application)60     private NonSensitivePackagesLiveData(@NonNull Application application) {
61         UidToSensitivityLiveData uidLiveData = UidToSensitivityLiveData.get(application);
62 
63         addSource(uidLiveData, uidToSensitivity -> AsyncTask.execute(() -> {
64             PackageManager pm = application.getPackageManager();
65 
66             ArrayList<ApplicationInfo> pkgs = new ArrayList<>();
67 
68             int numUids = uidToSensitivity.size();
69             for (int uidNum = 0; uidNum < numUids; uidNum++) {
70                 int uid = uidToSensitivity.keyAt(uidNum);
71                 UserHandle user = getUserHandleForUid(uid);
72                 ArrayMap<String, Integer> sensitivity = uidToSensitivity.valueAt(uidNum);
73 
74                 int numPerms = sensitivity.size();
75                 for (int permNum = 0; permNum < numPerms; permNum++) {
76                     if (sensitivity.valueAt(permNum) != FLAGS_ALWAYS_USER_SENSITIVE) {
77                         String[] uidPkgs = pm.getPackagesForUid(uid);
78 
79                         if (uidPkgs != null) {
80                             for (String pkg : uidPkgs) {
81                                 ApplicationInfo appInfo;
82                                 try {
83                                     appInfo = pm.getApplicationInfoAsUser(pkg, 0, user);
84                                 } catch (PackageManager.NameNotFoundException e) {
85                                     continue;
86                                 }
87 
88                                 pkgs.add(appInfo);
89                             }
90                         }
91                         break;
92                     }
93                 }
94 
95             }
96 
97             postValue(pkgs);
98         }));
99     }
100 }
101