1 /* 2 * Copyright (C) 2023 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.healthconnect.migration; 18 19 import android.Manifest; 20 import android.content.Context; 21 import android.content.Intent; 22 import android.content.pm.PackageInfo; 23 import android.content.pm.PackageManager; 24 import android.content.pm.ResolveInfo; 25 import android.health.connect.Constants; 26 import android.health.connect.HealthConnectManager; 27 import android.util.Slog; 28 29 import libcore.util.HexEncoding; 30 31 import java.security.MessageDigest; 32 import java.security.NoSuchAlgorithmException; 33 import java.util.ArrayList; 34 import java.util.List; 35 import java.util.stream.Collectors; 36 37 /** @hide */ 38 public class MigrationUtils { 39 private static final String TAG = "HealthConnectMigrationUtils"; 40 41 /** 42 * Filters and returns the package names of applications which hold permission {@link 43 * android.Manifest.permission#MIGRATE_HEALTH_CONNECT_DATA}. 44 * 45 * @return List of filtered app package names which hold the specified permission 46 */ filterPermissions(Context context)47 public static List<String> filterPermissions(Context context) { 48 if (android.health.connect.Constants.DEBUG) { 49 Slog.d(TAG, "Calling filterPermissions()"); 50 } 51 52 String[] permissions = new String[] {Manifest.permission.MIGRATE_HEALTH_CONNECT_DATA}; 53 54 List<PackageInfo> packageInfos = 55 context.getPackageManager() 56 .getPackagesHoldingPermissions( 57 permissions, PackageManager.PackageInfoFlags.of(0)); 58 59 List<String> permissionFilteredPackages = 60 packageInfos.stream().map(info -> info.packageName).collect(Collectors.toList()); 61 62 if (android.health.connect.Constants.DEBUG) { 63 Slog.d(TAG, "permissionFilteredPackages : " + permissionFilteredPackages); 64 } 65 return permissionFilteredPackages; 66 } 67 68 /** 69 * Filters and returns the package names of applications which handle intent {@link 70 * android.health.connect.HealthConnectManager#ACTION_SHOW_MIGRATION_INFO}. 71 * 72 * @param permissionFilteredPackages List of app package names holding permission {@link 73 * android.Manifest.permission#MIGRATE_HEALTH_CONNECT_DATA} 74 * @return List of filtered app package names which handle the specified intent action 75 */ filterIntent( Context context, List<String> permissionFilteredPackages)76 public static List<String> filterIntent( 77 Context context, List<String> permissionFilteredPackages) { 78 return filterIntent(context, permissionFilteredPackages, PackageManager.MATCH_ALL); 79 } 80 81 /** 82 * Filters and returns the package names of applications which handle intent {@link 83 * android.health.connect.HealthConnectManager#ACTION_SHOW_MIGRATION_INFO}. 84 * 85 * @param permissionFilteredPackages List of app package names holding permission {@link 86 * android.Manifest.permission#MIGRATE_HEALTH_CONNECT_DATA} 87 * @param flags Additional option flags to modify the data returned. 88 * @return List of filtered app package names which handle the specified intent action 89 */ filterIntent( Context context, List<String> permissionFilteredPackages, int flags)90 public static List<String> filterIntent( 91 Context context, List<String> permissionFilteredPackages, int flags) { 92 if (android.health.connect.Constants.DEBUG) { 93 Slog.d(TAG, "Calling filterIntents()"); 94 } 95 96 List<String> filteredPackages = new ArrayList<String>(permissionFilteredPackages.size()); 97 98 for (String packageName : permissionFilteredPackages) { 99 100 if (android.health.connect.Constants.DEBUG) { 101 Slog.d(TAG, "Checking intent for package : " + packageName); 102 } 103 104 Intent intentToCheck = 105 new Intent(HealthConnectManager.ACTION_SHOW_MIGRATION_INFO) 106 .setPackage(packageName); 107 108 ResolveInfo resolveResult = 109 context.getPackageManager() 110 .resolveActivity( 111 intentToCheck, PackageManager.ResolveInfoFlags.of(flags)); 112 113 if (resolveResult != null) { 114 filteredPackages.add(packageName); 115 } 116 } 117 if (Constants.DEBUG) { 118 Slog.d(TAG, "filteredPackages : " + filteredPackages); 119 } 120 return filteredPackages; 121 } 122 123 /** Computes the SHA256 digest of the input data. */ 124 @SuppressWarnings("NullAway") // TODO(b/317029272): fix this suppression computeSha256DigestBytes(byte[] data)125 public static String computeSha256DigestBytes(byte[] data) { 126 MessageDigest messageDigest; 127 try { 128 messageDigest = MessageDigest.getInstance("SHA256"); 129 } catch (NoSuchAlgorithmException e) { 130 return null; 131 } 132 messageDigest.update(data); 133 134 return HexEncoding.encodeToString(messageDigest.digest(), /* uppercase= */ true); 135 } 136 137 /** Checks if the package is stub by checking if its installer source is not set. */ isPackageStub(Context context, String packageName)138 public static boolean isPackageStub(Context context, String packageName) { 139 try { 140 return context.getPackageManager() 141 .getInstallSourceInfo(packageName) 142 .getInstallingPackageName() 143 == null; 144 } catch (PackageManager.NameNotFoundException e) { 145 Slog.w(TAG, "Package not found " + packageName); 146 } 147 return false; 148 } 149 } 150