Neil Fuller | 328532a | 2017-03-16 18:32:21 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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.timezone; |
| 18 | |
| 19 | import com.android.internal.R; |
| 20 | |
| 21 | import android.content.Context; |
| 22 | import android.content.Intent; |
| 23 | import android.content.pm.PackageInfo; |
| 24 | import android.content.pm.PackageManager; |
| 25 | import android.content.pm.ProviderInfo; |
| 26 | import android.content.pm.ResolveInfo; |
| 27 | import android.content.res.Resources; |
| 28 | import android.os.SystemClock; |
Neil Fuller | 1281f39 | 2017-09-22 15:32:06 +0100 | [diff] [blame] | 29 | import android.os.UserHandle; |
Neil Fuller | 328532a | 2017-03-16 18:32:21 +0000 | [diff] [blame] | 30 | import android.util.Slog; |
| 31 | |
| 32 | import java.util.List; |
| 33 | |
| 34 | /** |
| 35 | * A single class that implements multiple helper interfaces for use by {@link PackageTracker}. |
| 36 | */ |
| 37 | final class PackageTrackerHelperImpl implements ClockHelper, ConfigHelper, PackageManagerHelper { |
| 38 | |
| 39 | private static final String TAG = "PackageTrackerHelperImpl"; |
| 40 | |
| 41 | private final Context mContext; |
| 42 | private final PackageManager mPackageManager; |
| 43 | |
| 44 | PackageTrackerHelperImpl(Context context) { |
| 45 | mContext = context; |
| 46 | mPackageManager = context.getPackageManager(); |
| 47 | } |
| 48 | |
| 49 | @Override |
| 50 | public boolean isTrackingEnabled() { |
| 51 | return mContext.getResources().getBoolean(R.bool.config_timeZoneRulesUpdateTrackingEnabled); |
| 52 | } |
| 53 | |
| 54 | @Override |
| 55 | public String getUpdateAppPackageName() { |
| 56 | return mContext.getResources().getString(R.string.config_timeZoneRulesUpdaterPackage); |
| 57 | } |
| 58 | |
| 59 | @Override |
| 60 | public String getDataAppPackageName() { |
| 61 | Resources resources = mContext.getResources(); |
| 62 | return resources.getString(R.string.config_timeZoneRulesDataPackage); |
| 63 | } |
| 64 | |
| 65 | @Override |
| 66 | public int getCheckTimeAllowedMillis() { |
| 67 | return mContext.getResources().getInteger( |
| 68 | R.integer.config_timeZoneRulesCheckTimeMillisAllowed); |
| 69 | } |
| 70 | |
| 71 | @Override |
| 72 | public int getFailedCheckRetryCount() { |
| 73 | return mContext.getResources().getInteger(R.integer.config_timeZoneRulesCheckRetryCount); |
| 74 | } |
| 75 | |
| 76 | @Override |
| 77 | public long currentTimestamp() { |
| 78 | // Use of elapsedRealtime() because this is in-memory state and elapsedRealtime() shouldn't |
| 79 | // change if the system clock changes. |
| 80 | return SystemClock.elapsedRealtime(); |
| 81 | } |
| 82 | |
| 83 | @Override |
| 84 | public int getInstalledPackageVersion(String packageName) |
| 85 | throws PackageManager.NameNotFoundException { |
| 86 | int flags = PackageManager.MATCH_DISABLED_UNTIL_USED_COMPONENTS; |
| 87 | PackageInfo packageInfo = mPackageManager.getPackageInfo(packageName, flags); |
| 88 | return packageInfo.versionCode; |
| 89 | } |
| 90 | |
| 91 | @Override |
| 92 | public boolean isPrivilegedApp(String packageName) throws PackageManager.NameNotFoundException { |
| 93 | int flags = PackageManager.MATCH_DISABLED_UNTIL_USED_COMPONENTS; |
| 94 | PackageInfo packageInfo = mPackageManager.getPackageInfo(packageName, flags); |
| 95 | return packageInfo.applicationInfo.isPrivilegedApp(); |
| 96 | } |
| 97 | |
| 98 | @Override |
| 99 | public boolean usesPermission(String packageName, String requiredPermissionName) |
| 100 | throws PackageManager.NameNotFoundException { |
| 101 | int flags = PackageManager.MATCH_DISABLED_UNTIL_USED_COMPONENTS |
| 102 | | PackageManager.GET_PERMISSIONS; |
| 103 | PackageInfo packageInfo = mPackageManager.getPackageInfo(packageName, flags); |
| 104 | if (packageInfo.requestedPermissions == null) { |
| 105 | return false; |
| 106 | } |
| 107 | for (String requestedPermission : packageInfo.requestedPermissions) { |
| 108 | if (requiredPermissionName.equals(requestedPermission)) { |
| 109 | return true; |
| 110 | } |
| 111 | } |
| 112 | return false; |
| 113 | } |
| 114 | |
| 115 | @Override |
| 116 | public boolean contentProviderRegistered(String authority, String requiredPackageName) { |
| 117 | int flags = PackageManager.MATCH_DISABLED_UNTIL_USED_COMPONENTS; |
Neil Fuller | 1281f39 | 2017-09-22 15:32:06 +0100 | [diff] [blame] | 118 | ProviderInfo providerInfo = mPackageManager.resolveContentProviderAsUser( |
| 119 | authority, flags, UserHandle.SYSTEM.getIdentifier()); |
Neil Fuller | 328532a | 2017-03-16 18:32:21 +0000 | [diff] [blame] | 120 | if (providerInfo == null) { |
| 121 | Slog.i(TAG, "contentProviderRegistered: No content provider registered with authority=" |
| 122 | + authority); |
| 123 | return false; |
| 124 | } |
| 125 | boolean packageMatches = |
| 126 | requiredPackageName.equals(providerInfo.applicationInfo.packageName); |
| 127 | if (!packageMatches) { |
| 128 | Slog.i(TAG, "contentProviderRegistered: App with packageName=" + requiredPackageName |
| 129 | + " does not expose the a content provider with authority=" + authority); |
| 130 | return false; |
| 131 | } |
| 132 | return true; |
| 133 | } |
| 134 | |
| 135 | @Override |
| 136 | public boolean receiverRegistered(Intent intent, String requiredPermissionName) |
| 137 | throws PackageManager.NameNotFoundException { |
| 138 | |
| 139 | int flags = PackageManager.MATCH_DISABLED_UNTIL_USED_COMPONENTS; |
Neil Fuller | 1281f39 | 2017-09-22 15:32:06 +0100 | [diff] [blame] | 140 | List<ResolveInfo> resolveInfo = mPackageManager.queryBroadcastReceiversAsUser( |
| 141 | intent, flags, UserHandle.SYSTEM); |
Neil Fuller | 328532a | 2017-03-16 18:32:21 +0000 | [diff] [blame] | 142 | if (resolveInfo.size() != 1) { |
| 143 | Slog.i(TAG, "receiverRegistered: Zero or multiple broadcast receiver registered for" |
| 144 | + " intent=" + intent + ", found=" + resolveInfo); |
| 145 | return false; |
| 146 | } |
| 147 | |
| 148 | ResolveInfo matched = resolveInfo.get(0); |
| 149 | boolean requiresPermission = requiredPermissionName.equals(matched.activityInfo.permission); |
| 150 | if (!requiresPermission) { |
| 151 | Slog.i(TAG, "receiverRegistered: Broadcast receiver registered for intent=" |
| 152 | + intent + " must require permission " + requiredPermissionName); |
| 153 | } |
| 154 | return requiresPermission; |
| 155 | } |
| 156 | } |