/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.net;
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import static android.Manifest.permission.NETWORK_STACK;
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import static android.content.pm.PackageManager.PERMISSION_GRANTED;
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import android.annotation.NonNull;
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import android.annotation.SystemApi;
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import android.annotation.TestApi;
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import android.content.Context;
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import java.util.ArrayList;
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import java.util.Arrays;
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/**
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*
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* Constants for client code communicating with the network stack service.
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* @hide
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*/
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@SystemApi
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@TestApi
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public class NetworkStack {
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/**
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* Permission granted only to the NetworkStack APK, defined in NetworkStackStub with signature
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* protection level.
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* @hide
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*/
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@SystemApi
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@TestApi
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public static final String PERMISSION_MAINLINE_NETWORK_STACK =
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"android.permission.MAINLINE_NETWORK_STACK";
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private NetworkStack() {}
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/**
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* If the NetworkStack, MAINLINE_NETWORK_STACK are not allowed for a particular process, throw a
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* {@link SecurityException}.
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*
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* @param context {@link android.content.Context} for the process.
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*
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* @hide
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*/
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public static void checkNetworkStackPermission(final @NonNull Context context) {
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checkNetworkStackPermissionOr(context);
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}
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/**
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* If the NetworkStack, MAINLINE_NETWORK_STACK or other specified permissions are not allowed
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* for a particular process, throw a {@link SecurityException}.
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*
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* @param context {@link android.content.Context} for the process.
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* @param otherPermissions The set of permissions that could be the candidate permissions , or
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* empty string if none of other permissions needed.
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* @hide
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*/
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public static void checkNetworkStackPermissionOr(final @NonNull Context context,
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final @NonNull String... otherPermissions) {
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ArrayList<String> permissions = new ArrayList<String>(Arrays.asList(otherPermissions));
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permissions.add(NETWORK_STACK);
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permissions.add(PERMISSION_MAINLINE_NETWORK_STACK);
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enforceAnyPermissionOf(context, permissions.toArray(new String[0]));
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}
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private static void enforceAnyPermissionOf(final @NonNull Context context,
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final @NonNull String... permissions) {
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if (!checkAnyPermissionOf(context, permissions)) {
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throw new SecurityException("Requires one of the following permissions: "
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+ String.join(", ", permissions) + ".");
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}
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}
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private static boolean checkAnyPermissionOf(final @NonNull Context context,
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final @NonNull String... permissions) {
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for (String permission : permissions) {
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if (context.checkCallingOrSelfPermission(permission) == PERMISSION_GRANTED) {
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return true;
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}
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}
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return false;
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}
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}
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