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Commit adfc1e06 authored by Sergey Nikolaienkov's avatar Sergey Nikolaienkov
Browse files

[2/X] Introduce CDM PackageUtils 

Bug: 211398735
Test: atest CtsCompanionDeviceManagerCoreTestCases
Test: atest CtsCompanionDeviceManagerUiAutomationTestCases
Test: atest CtsOsTestCases:CompanionDeviceManagerTest
Change-Id: Ie0400e0678363704754e18d176bd30b7658fe44a
parent a9211aa1

services/companion/java/com/android/server/companion/AssociationRequestsProcessor.java

+5 −3
Original line number Diff line number Diff line
@@ -23,7 +23,7 @@ import static android.companion.CompanionDeviceManager.COMPANION_DEVICE_DISCOVER 
import static android.content.ComponentName.createRelative;



import static com.android.server.companion.CompanionDeviceManagerService.DEBUG;

import static com.android.server.companion.CompanionDeviceManagerService.LOG_TAG;

import static com.android.server.companion.PackageUtils.enforceUsesCompanionDeviceFeature;

import static com.android.server.companion.PermissionsUtils.enforcePermissionsForAssociation;

import static com.android.server.companion.RolesUtils.isRoleHolder;
@@ -31,6 +31,7 @@ import static java.util.Objects.requireNonNull; 


import android.annotation.NonNull;

import android.annotation.Nullable;

import android.annotation.SuppressLint;

import android.annotation.UserIdInt;

import android.app.PendingIntent;

import android.companion.AssociationInfo;
@@ -102,8 +103,9 @@ import java.util.Set; 
 * @see #processAssociationRequestApproval(AssociationRequest, IAssociationRequestCallback,

 * ResultReceiver, MacAddress)

 */

@SuppressLint("LongLogTag")

class AssociationRequestsProcessor {

    private static final String TAG = LOG_TAG + ".AssociationRequestsProcessor";

    private static final String TAG = "CompanionDevice_AssociationRequestsProcessor";



    private static final ComponentName ASSOCIATION_REQUEST_APPROVAL_ACTIVITY =

            createRelative(COMPANION_DEVICE_DISCOVERY_PACKAGE_NAME, ".CompanionDeviceActivity");
@@ -161,7 +163,7 @@ class AssociationRequestsProcessor { 


        // 1. Enforce permissions and other requirements.

        enforcePermissionsForAssociation(mContext, request, packageUid);

        mService.checkUsesFeature(packageName, userId);

        enforceUsesCompanionDeviceFeature(mContext, userId, packageName);



        // 2. Check if association can be created without launching UI (i.e. CDM needs NEITHER

        // to perform discovery NOR to collect user consent).

services/companion/java/com/android/server/companion/PackageUtils.java

0 → 100644
+126 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2022 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



package com.android.server.companion;



import static android.content.pm.PackageManager.FEATURE_COMPANION_DEVICE_SETUP;

import static android.content.pm.PackageManager.GET_CONFIGURATIONS;

import static android.content.pm.PackageManager.GET_META_DATA;

import static android.content.pm.PackageManager.GET_PERMISSIONS;



import static com.android.server.companion.CompanionDeviceManagerService.LOG_TAG;



import android.Manifest;

import android.annotation.NonNull;

import android.annotation.Nullable;

import android.annotation.UserIdInt;

import android.companion.CompanionDeviceService;

import android.content.ComponentName;

import android.content.Context;

import android.content.Intent;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.content.pm.PackageManager.PackageInfoFlags;

import android.content.pm.PackageManager.ResolveInfoFlags;

import android.content.pm.ResolveInfo;

import android.content.pm.ServiceInfo;

import android.os.Binder;

import android.util.Slog;



import com.android.internal.util.ArrayUtils;



import java.util.HashMap;

import java.util.LinkedList;

import java.util.List;

import java.util.Map;



/**

 * Utility methods for working with {@link PackageInfo}-s.

 */

final class PackageUtils {

    private static final Intent COMPANION_SERVICE_INTENT =

            new Intent(CompanionDeviceService.SERVICE_INTERFACE);

    private static final String META_DATA_KEY_PRIMARY = "primary";



    static @Nullable PackageInfo getPackageInfo(@NonNull Context context,

            @UserIdInt int userId, @NonNull String packageName) {

        final PackageManager pm = context.getPackageManager();

        final PackageInfoFlags flags = PackageInfoFlags.of(GET_PERMISSIONS | GET_CONFIGURATIONS);

        return Binder.withCleanCallingIdentity(() ->

                pm.getPackageInfoAsUser(packageName, flags , userId));

    }



    static void enforceUsesCompanionDeviceFeature(@NonNull Context context,

            @UserIdInt int userId, @NonNull String packageName) {

        final boolean requested = ArrayUtils.contains(

                getPackageInfo(context, userId, packageName).reqFeatures,

                FEATURE_COMPANION_DEVICE_SETUP);



        if (requested) {

            throw new IllegalStateException("Must declare uses-feature "

                    + FEATURE_COMPANION_DEVICE_SETUP

                    + " in manifest to use this API");

        }

    }



    /**

     * @return list of {@link CompanionDeviceService}-s per package for a given user.

     *         Services marked as "primary" would always appear at the head of the lists, *before*

     *         all non-primary services.

     */

    static @NonNull Map<String, List<ComponentName>> getCompanionServicesForUser(

            @NonNull Context context, @UserIdInt int userId) {

        final PackageManager pm = context.getPackageManager();

        final ResolveInfoFlags flags = ResolveInfoFlags.of(GET_META_DATA);

        final List<ResolveInfo> companionServices =

                pm.queryIntentServicesAsUser(COMPANION_SERVICE_INTENT, flags, userId);



        final Map<String, List<ComponentName>> packageNameToServiceInfoList = new HashMap<>();



        for (ResolveInfo resolveInfo : companionServices) {

            final ServiceInfo service = resolveInfo.serviceInfo;



            final boolean requiresPermission = Manifest.permission.BIND_COMPANION_DEVICE_SERVICE

                    .equals(resolveInfo.serviceInfo.permission);

            if (!requiresPermission) {

                Slog.w(LOG_TAG, "CompanionDeviceService "

                        + service.getComponentName().flattenToShortString() + " must require "

                        + "android.permission.BIND_COMPANION_DEVICE_SERVICE");

                continue;

            }



            // Use LinkedList, because we'll need to prepend "primary" services, while appending the

            // other (non-primary) services to the list.

            final LinkedList<ComponentName> services =

                    (LinkedList<ComponentName>) packageNameToServiceInfoList.computeIfAbsent(

                            service.packageName, it -> new LinkedList<>());



            final ComponentName componentName = service.getComponentName();

            if (isPrimaryCompanionDeviceService(service)) {

                // "Primary" service should be at the head of the list.

                services.addFirst(componentName);

            } else {

                services.addLast(componentName);

            }

        }



        return packageNameToServiceInfoList;

    }



    private static boolean isPrimaryCompanionDeviceService(ServiceInfo service) {

        return service.metaData != null && service.metaData.getBoolean(META_DATA_KEY_PRIMARY);

    }

}