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.settings.password; 18 19 import static com.android.settings.Utils.SETTINGS_PACKAGE_NAME; 20 21 import android.annotation.Nullable; 22 import android.app.ActivityManager; 23 import android.app.IActivityManager; 24 import android.content.Context; 25 import android.content.pm.PackageManager; 26 import android.os.IBinder; 27 import android.os.RemoteException; 28 import android.os.UserHandle; 29 import android.util.Log; 30 31 import com.android.settings.Utils; 32 33 public final class PasswordUtils extends com.android.settingslib.Utils { 34 35 private static final String TAG = "Settings"; 36 37 /** 38 * Returns whether the uid which the activity with {@code activityToken} is launched from has 39 * been granted the {@code permission}. 40 */ isCallingAppPermitted(Context context, IBinder activityToken, String permission)41 public static boolean isCallingAppPermitted(Context context, IBinder activityToken, 42 String permission) { 43 try { 44 return context.checkPermission(permission, /* pid= */ -1, 45 ActivityManager.getService().getLaunchedFromUid(activityToken)) 46 == PackageManager.PERMISSION_GRANTED; 47 } catch (RemoteException e) { 48 Log.v(TAG, "Could not talk to activity manager.", e); 49 return false; 50 } 51 } 52 53 /** 54 * Returns the label of the package which the activity with {@code activityToken} is launched 55 * from or {@code null} if it is launched from the settings app itself. 56 */ 57 @Nullable getCallingAppLabel(Context context, IBinder activityToken)58 public static CharSequence getCallingAppLabel(Context context, IBinder activityToken) { 59 String pkg = getCallingAppPackageName(activityToken); 60 if (pkg == null || pkg.equals(SETTINGS_PACKAGE_NAME)) { 61 return null; 62 } 63 64 return Utils.getApplicationLabel(context, pkg); 65 } 66 67 /** 68 * Returns the package name which the activity with {@code activityToken} is launched from. 69 */ 70 @Nullable getCallingAppPackageName(IBinder activityToken)71 public static String getCallingAppPackageName(IBinder activityToken) { 72 String pkg = null; 73 try { 74 pkg = ActivityManager.getService().getLaunchedFromPackage(activityToken); 75 } catch (RemoteException e) { 76 Log.v(TAG, "Could not talk to activity manager.", e); 77 } 78 return pkg; 79 } 80 81 /** Crashes the calling application and provides it with {@code message}. */ crashCallingApplication(IBinder activityToken, String message)82 public static void crashCallingApplication(IBinder activityToken, String message) { 83 IActivityManager am = ActivityManager.getService(); 84 try { 85 int uid = am.getLaunchedFromUid(activityToken); 86 int userId = UserHandle.getUserId(uid); 87 am.crashApplication( 88 uid, 89 /* initialPid= */ -1, 90 getCallingAppPackageName(activityToken), 91 userId, 92 message, 93 false); 94 } catch (RemoteException e) { 95 Log.v(TAG, "Could not talk to activity manager.", e); 96 } 97 } 98 } 99