| /* |
| * Copyright (C) 2021 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.permissioncontroller.permission.data |
| |
| import android.app.Application |
| import android.app.admin.DeviceAdminReceiver |
| import android.content.Intent |
| import android.content.pm.PackageManager |
| import android.os.UserHandle |
| import com.android.permissioncontroller.DumpableLog |
| import com.android.permissioncontroller.PermissionControllerApplication |
| import com.android.permissioncontroller.hibernation.DEBUG_AUTO_REVOKE_POLICY |
| import com.android.permissioncontroller.permission.utils.Utils.getUserContext |
| import kotlinx.coroutines.Job |
| |
| /** |
| * A LiveData which tracks broadcast receivers for a certain type |
| * |
| * @param app The current application |
| * @param intentAction The name of the action the receiver receives |
| * @param permission The permission required for the receiver |
| * @param user The user the receivers should be determined for |
| */ |
| class BroadcastReceiverLiveData( |
| private val app: Application, |
| override val intentAction: String, |
| private val permission: String, |
| private val user: UserHandle |
| ) : SmartAsyncMediatorLiveData<Set<String>>(), |
| PackageBroadcastReceiver.PackageBroadcastListener, |
| HasIntentAction { |
| |
| private val name = intentAction.substringAfterLast(".") |
| |
| private val enabledDeviceAdminsLiveDataLiveData = EnabledDeviceAdminsLiveData[user] |
| |
| init { |
| if (intentAction == DeviceAdminReceiver.ACTION_DEVICE_ADMIN_ENABLED) { |
| addSource(enabledDeviceAdminsLiveDataLiveData) { |
| updateAsync() |
| } |
| } |
| } |
| |
| override fun onPackageUpdate(packageName: String) { |
| updateAsync() |
| } |
| |
| override suspend fun loadDataAndPostValue(job: Job) { |
| if (job.isCancelled) { |
| return |
| } |
| if (intentAction == DeviceAdminReceiver.ACTION_DEVICE_ADMIN_ENABLED && |
| !enabledDeviceAdminsLiveDataLiveData.isInitialized) { |
| return |
| } |
| |
| val packageNames = getUserContext(app, user).packageManager |
| .queryBroadcastReceivers( |
| Intent(intentAction), |
| PackageManager.GET_RECEIVERS or PackageManager.GET_META_DATA) |
| .mapNotNull { resolveInfo -> |
| if (resolveInfo?.activityInfo?.permission != permission) { |
| return@mapNotNull null |
| } |
| val packageName = resolveInfo?.activityInfo?.packageName |
| if (!isReceiverEnabled(packageName)) { |
| if (DEBUG_AUTO_REVOKE_POLICY) { |
| DumpableLog.i(LOG_TAG, |
| "Not exempting $packageName - not an active $name " + |
| "for u${user.identifier}") |
| } |
| return@mapNotNull null |
| } |
| packageName |
| }.toSet() |
| if (DEBUG_AUTO_REVOKE_POLICY) { |
| DumpableLog.i(LOG_TAG, |
| "Detected ${intentAction.substringAfterLast(".")}s: $packageNames") |
| } |
| |
| postValue(packageNames) |
| } |
| |
| private fun isReceiverEnabled(pkg: String?): Boolean { |
| if (pkg == null) { |
| return false |
| } |
| return when (intentAction) { |
| DeviceAdminReceiver.ACTION_DEVICE_ADMIN_ENABLED -> { |
| pkg in enabledDeviceAdminsLiveDataLiveData.value!! |
| } |
| else -> true |
| } |
| } |
| |
| override fun onActive() { |
| super.onActive() |
| |
| PackageBroadcastReceiver.addAllCallback(this) |
| } |
| |
| override fun onInactive() { |
| super.onInactive() |
| |
| PackageBroadcastReceiver.removeAllCallback(this) |
| } |
| |
| /** |
| * Repository for [BroadcastReceiverLiveData] |
| * |
| * <p> Key value is a (string intent action, required permission, user) triple, value is its |
| * corresponding LiveData. |
| */ |
| companion object : DataRepositoryForPackage<Triple<String, String, UserHandle>, |
| BroadcastReceiverLiveData>() { |
| private const val LOG_TAG = "BroadcastReceiverLiveData" |
| |
| override fun newValue(key: Triple<String, String, UserHandle>): BroadcastReceiverLiveData { |
| return BroadcastReceiverLiveData(PermissionControllerApplication.get(), |
| key.first, key.second, key.third) |
| } |
| } |
| } |