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1 /*
2  * Copyright (C) 2016 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.wifi.util;
18 
19 import android.Manifest;
20 import android.app.ActivityManager;
21 import android.content.Context;
22 import android.content.pm.PackageManager;
23 import android.util.Log;
24 
25 /**
26  * A wifi permissions dependency class to wrap around external
27  * calls to static methods that enable testing.
28  */
29 public class WifiPermissionsWrapper {
30     private static final String TAG = "WifiPermissionsWrapper";
31     private final Context mContext;
32     private boolean mVerboseLoggingEnabled;
33 
WifiPermissionsWrapper(Context context)34     public WifiPermissionsWrapper(Context context) {
35         mContext = context;
36     }
37 
getCurrentUser()38     public int getCurrentUser() {
39         return ActivityManager.getCurrentUser();
40     }
41 
42     /**
43      * Determine if a UID has a permission.
44      * @param permissionType permission string
45      * @param uid to get permission for
46      * @return Permissions setting
47      */
getUidPermission(String permissionType, int uid)48     public int getUidPermission(String permissionType, int uid) {
49         // We don't care about pid, pass in -1
50         int granted = mContext.checkPermission(permissionType, -1, uid);
51         if (mVerboseLoggingEnabled) {
52             Log.v(TAG, "getUidPermission(" + permissionType + ", " + uid + "): "
53                     + (granted == PackageManager.PERMISSION_GRANTED));
54         }
55         return granted;
56     }
57 
58     /**
59      * Determines if the caller has the override wifi config permission.
60      *
61      * @param uid to check the permission for
62      * @return int representation of success or denied
63      */
getOverrideWifiConfigPermission(int uid)64     public int getOverrideWifiConfigPermission(int uid) {
65         return getUidPermission(android.Manifest.permission.OVERRIDE_WIFI_CONFIG, uid);
66     }
67 
68     /**
69      * Determines if the caller has local mac address permission.
70      *
71      * @param uid to check the permission for
72      * @return int representation of success or denied
73      */
getLocalMacAddressPermission(int uid)74     public int getLocalMacAddressPermission(int uid) {
75         return getUidPermission(Manifest.permission.LOCAL_MAC_ADDRESS, uid);
76     }
77 
78     /**
79      * Sets the verbose logging level.
80      */
enableVerboseLogging(boolean enabled)81     public void enableVerboseLogging(boolean enabled) {
82         mVerboseLoggingEnabled = enabled;
83     }
84 }
85