1 /* 2 * Copyright (C) 2020 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.pm.verify.domain; 18 19 import android.annotation.CheckResult; 20 import android.annotation.NonNull; 21 import android.content.Intent; 22 import android.content.pm.ApplicationInfo; 23 import android.content.pm.PackageManager; 24 import android.content.pm.PackageManager.NameNotFoundException; 25 import android.text.TextUtils; 26 import android.util.Patterns; 27 28 import com.android.internal.util.CollectionUtils; 29 import com.android.server.compat.PlatformCompat; 30 import com.android.server.pm.PackageManagerService; 31 import com.android.server.pm.parsing.pkg.AndroidPackage; 32 33 import java.util.Set; 34 import java.util.regex.Matcher; 35 36 public final class DomainVerificationUtils { 37 38 private static final ThreadLocal<Matcher> sCachedMatcher = ThreadLocal.withInitial( 39 () -> Patterns.DOMAIN_NAME.matcher("")); 40 41 /** 42 * Consolidates package exception messages. A generic unavailable message is included since the 43 * caller doesn't bother to check why the package isn't available. 44 */ 45 @CheckResult throwPackageUnavailable(@onNull String packageName)46 static NameNotFoundException throwPackageUnavailable(@NonNull String packageName) 47 throws NameNotFoundException { 48 throw new NameNotFoundException("Package " + packageName + " unavailable"); 49 } 50 isDomainVerificationIntent(Intent intent, @PackageManager.ResolveInfoFlags int resolveInfoFlags)51 public static boolean isDomainVerificationIntent(Intent intent, 52 @PackageManager.ResolveInfoFlags int resolveInfoFlags) { 53 if (!intent.isWebIntent()) { 54 return false; 55 } 56 57 String host = intent.getData().getHost(); 58 if (TextUtils.isEmpty(host)) { 59 return false; 60 } 61 62 if (!sCachedMatcher.get().reset(host).matches()) { 63 return false; 64 } 65 66 Set<String> categories = intent.getCategories(); 67 int categoriesSize = CollectionUtils.size(categories); 68 if (categoriesSize > 2) { 69 // Specifying at least one non-app-link category 70 return false; 71 } else if (categoriesSize == 2) { 72 // Check for explicit app link intent with exactly BROWSABLE && DEFAULT 73 return intent.hasCategory(Intent.CATEGORY_DEFAULT) 74 && intent.hasCategory(Intent.CATEGORY_BROWSABLE); 75 } 76 77 boolean matchDefaultByFlags = (resolveInfoFlags & PackageManager.MATCH_DEFAULT_ONLY) != 0; 78 79 // Check if matches (BROWSABLE || none) && DEFAULT 80 if (categoriesSize == 0) { 81 // No categories, only allow matching DEFAULT by flags 82 return matchDefaultByFlags; 83 } else if (intent.hasCategory(Intent.CATEGORY_BROWSABLE)) { 84 // Intent matches BROWSABLE, must match DEFAULT by flags 85 return matchDefaultByFlags; 86 } else { 87 // Otherwise only needs to have DEFAULT 88 return intent.hasCategory(Intent.CATEGORY_DEFAULT); 89 } 90 } 91 isChangeEnabled(PlatformCompat platformCompat, AndroidPackage pkg, long changeId)92 static boolean isChangeEnabled(PlatformCompat platformCompat, AndroidPackage pkg, 93 long changeId) { 94 return platformCompat.isChangeEnabledInternalNoLogging(changeId, buildMockAppInfo(pkg)); 95 } 96 97 /** 98 * Passed to {@link PlatformCompat} because this can be invoked mid-install process or when 99 * {@link PackageManagerService#mLock} is being held, and {@link PlatformCompat} will not be 100 * able to query the pending {@link ApplicationInfo} from {@link PackageManager}. 101 * <p> 102 * TODO(b/177613575): Can a different API be used? 103 */ 104 @NonNull buildMockAppInfo(@onNull AndroidPackage pkg)105 private static ApplicationInfo buildMockAppInfo(@NonNull AndroidPackage pkg) { 106 ApplicationInfo appInfo = new ApplicationInfo(); 107 appInfo.packageName = pkg.getPackageName(); 108 appInfo.targetSdkVersion = pkg.getTargetSdkVersion(); 109 return appInfo; 110 } 111 } 112