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 package com.example.android.autofill.service.datasource; 17 18 import android.content.Context; 19 import android.util.Log; 20 21 import com.example.android.autofill.service.SecurityHelper; 22 23 import static com.example.android.autofill.service.CommonUtil.TAG; 24 25 /** 26 * Singleton repository that caches the result of Digital Asset Links checks. 27 */ 28 public class SharedPrefsDigitalAssetLinksRepository implements DigitalAssetLinksDataSource { 29 30 private static SharedPrefsDigitalAssetLinksRepository sInstance; 31 32 private SharedPrefsDigitalAssetLinksRepository() { 33 } 34 35 public static SharedPrefsDigitalAssetLinksRepository getInstance() { 36 if (sInstance == null) { 37 sInstance = new SharedPrefsDigitalAssetLinksRepository(); 38 } 39 return sInstance; 40 } 41 42 @Override 43 public boolean isValid(Context context, String webDomain, String packageName) { 44 // TODO: implement caching. It could cache the whole domain -> (packagename, fingerprint), 45 // but then either invalidate when the package change or when the DAL association times out 46 // (the maxAge is part of the API response), or document that a real-life service 47 // should do that. 48 49 String fingerprint = null; 50 try { 51 fingerprint = SecurityHelper.getFingerprint(context, packageName); 52 } catch (Exception e) { 53 Log.w(TAG, "error getting fingerprint for " + packageName, e); 54 return false; 55 } 56 return SecurityHelper.isValid(webDomain, packageName, fingerprint); 57 } 58 59 @Override 60 public void clear(Context context) { 61 // TODO: implement once if caches results or remove from the interface 62 } 63 } 64
