/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.wifi.util;
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import android.Manifest;
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import android.app.ActivityManager;
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import android.app.AppGlobals;
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import android.app.admin.DevicePolicyManagerInternal;
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import android.content.Context;
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import android.os.RemoteException;
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import android.os.UserHandle;
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import com.android.server.LocalServices;
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import java.util.List;
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/**
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* A wifi permissions dependency class to wrap around external
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* calls to static methods that enable testing.
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*/
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public class WifiPermissionsWrapper {
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private static final String TAG = "WifiPermissionsWrapper";
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private final Context mContext;
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public WifiPermissionsWrapper(Context context) {
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mContext = context;
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}
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public int getCurrentUser() {
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return ActivityManager.getCurrentUser();
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}
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/**
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* Returns the user ID corresponding to the UID
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* @param uid Calling Uid
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* @return userid Corresponding user id
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*/
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public int getCallingUserId(int uid) {
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return UserHandle.getUserId(uid);
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}
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/**
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* Get the PackageName of the top running task
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* @return String corresponding to the package
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*/
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public String getTopPkgName() {
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ActivityManager am = (ActivityManager) mContext.getSystemService(Context.ACTIVITY_SERVICE);
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String topTaskPkg = " ";
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List<ActivityManager.RunningTaskInfo> tasks = am.getRunningTasks(1);
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if (!tasks.isEmpty()) {
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return tasks.get(0).topActivity.getPackageName();
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}
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return topTaskPkg;
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}
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/**
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* API is wrap around ActivityManager class to
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* get location permissions for a certain UID
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* @param: Manifest permission string
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* @param: Uid to get permission for
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* @return: Permissions setting
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*/
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public int getUidPermission(String permissionType, int uid) {
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return ActivityManager.checkUidPermission(permissionType, uid);
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}
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/**
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* Gets the local service {link@ DevicePolicyManagerInternal}, can be null
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*/
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public DevicePolicyManagerInternal getDevicePolicyManagerInternal() {
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return LocalServices.getService(DevicePolicyManagerInternal.class);
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}
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/**
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* Determines if the caller has the override wifi config permission.
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*
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* @param uid to check the permission for
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* @return int representation of success or denied
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* @throws RemoteException
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*/
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public int getOverrideWifiConfigPermission(int uid) throws RemoteException {
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return AppGlobals.getPackageManager().checkUidPermission(
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android.Manifest.permission.OVERRIDE_WIFI_CONFIG, uid);
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}
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/**
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* Determines if the caller has the change wifi config permission.
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*
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* @param uid to check the permission for
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* @return int representation of success or denied
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* @throws RemoteException
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*/
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public int getChangeWifiConfigPermission(int uid) throws RemoteException {
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return AppGlobals.getPackageManager().checkUidPermission(
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Manifest.permission.CHANGE_WIFI_STATE, uid);
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}
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/**
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* Determines if the caller has the access wifi state permission.
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*
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* @param uid to check the permission for
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* @return int representation of success or denied
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* @throws RemoteException
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*/
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public int getAccessWifiStatePermission(int uid) throws RemoteException {
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return AppGlobals.getPackageManager().checkUidPermission(
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Manifest.permission.ACCESS_WIFI_STATE, uid);
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}
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/**
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* Determines if the caller has local mac address permission.
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*
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* @param uid to check the permission for
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* @return int representation of success or denied
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* @throws RemoteException
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*/
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public int getLocalMacAddressPermission(int uid) throws RemoteException {
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return AppGlobals.getPackageManager().checkUidPermission(
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Manifest.permission.LOCAL_MAC_ADDRESS, uid);
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}
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}
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