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/*
* Copyright (C) 2018 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 android.net;
import static android.Manifest.permission.NETWORK_STACK;
import static android.content.pm.PackageManager.PERMISSION_GRANTED;
import android.annotation.NonNull;
import android.annotation.SystemApi;
import android.annotation.TestApi;
import android.content.Context;
import java.util.ArrayList;
import java.util.Arrays;
/**
*
* Constants for client code communicating with the network stack service.
* @hide
*/
@SystemApi
@TestApi
public class NetworkStack {
/**
* Permission granted only to the NetworkStack APK, defined in NetworkStackStub with signature
* protection level.
* @hide
*/
@SystemApi
@TestApi
public static final String PERMISSION_MAINLINE_NETWORK_STACK =
"android.permission.MAINLINE_NETWORK_STACK";
private NetworkStack() {}
/**
* If the NetworkStack, MAINLINE_NETWORK_STACK are not allowed for a particular process, throw a
* {@link SecurityException}.
*
* @param context {@link android.content.Context} for the process.
*
* @hide
*/
public static void checkNetworkStackPermission(final @NonNull Context context) {
checkNetworkStackPermissionOr(context);
}
/**
* If the NetworkStack, MAINLINE_NETWORK_STACK or other specified permissions are not allowed
* for a particular process, throw a {@link SecurityException}.
*
* @param context {@link android.content.Context} for the process.
* @param otherPermissions The set of permissions that could be the candidate permissions , or
* empty string if none of other permissions needed.
* @hide
*/
public static void checkNetworkStackPermissionOr(final @NonNull Context context,
final @NonNull String... otherPermissions) {
ArrayList<String> permissions = new ArrayList<String>(Arrays.asList(otherPermissions));
permissions.add(NETWORK_STACK);
permissions.add(PERMISSION_MAINLINE_NETWORK_STACK);
enforceAnyPermissionOf(context, permissions.toArray(new String[0]));
}
private static void enforceAnyPermissionOf(final @NonNull Context context,
final @NonNull String... permissions) {
if (!checkAnyPermissionOf(context, permissions)) {
throw new SecurityException("Requires one of the following permissions: "
+ String.join(", ", permissions) + ".");
}
}
private static boolean checkAnyPermissionOf(final @NonNull Context context,
final @NonNull String... permissions) {
for (String permission : permissions) {
if (context.checkCallingOrSelfPermission(permission) == PERMISSION_GRANTED) {
return true;
}
}
return false;
}
}
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