1 /*
2  * Copyright (C) 2021 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.net.module.util;
18 
19 import android.annotation.NonNull;
20 import android.annotation.Nullable;
21 
22 /**
23  * Utilities to examine {@link android.net.NetworkIdentity}.
24  * @hide
25  */
26 public class NetworkIdentityUtils {
27     /**
28      * Scrub given IMSI on production builds.
29      */
30     @NonNull
scrubSubscriberId(@ullable String subscriberId)31     public static String scrubSubscriberId(@Nullable String subscriberId) {
32         if (subscriberId != null) {
33             // TODO: parse this as MCC+MNC instead of hard-coding
34             return subscriberId.substring(0, Math.min(6, subscriberId.length())) + "...";
35         } else {
36             return "null";
37         }
38     }
39 
40     /**
41      * Scrub given IMSI on production builds.
42      */
43     @Nullable
scrubSubscriberIds(@ullable String[] subscriberIds)44     public static String[] scrubSubscriberIds(@Nullable String[] subscriberIds) {
45         if (subscriberIds == null) return null;
46         final String[] res = new String[subscriberIds.length];
47         for (int i = 0; i < res.length; i++) {
48             res[i] = scrubSubscriberId(subscriberIds[i]);
49         }
50         return res;
51     }
52 }
53