1/*
2 * Copyright (C) 2015 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
17package android.security;
18
19import android.content.Context;
20import android.os.RemoteException;
21import android.os.ServiceManager;
22import android.os.UserHandle;
23import android.service.gatekeeper.IGateKeeperService;
24
25/**
26 * Convenience class for accessing the gatekeeper service.
27 *
28 * @hide
29 */
30public abstract class GateKeeper {
31
32    public static final long INVALID_SECURE_USER_ID = 0;
33
34    private GateKeeper() {}
35
36    public static IGateKeeperService getService() {
37        IGateKeeperService service = IGateKeeperService.Stub.asInterface(
38                ServiceManager.getService(Context.GATEKEEPER_SERVICE));
39        if (service == null) {
40            throw new IllegalStateException("Gatekeeper service not available");
41        }
42        return service;
43    }
44
45    public static long getSecureUserId() throws IllegalStateException {
46        try {
47            return getService().getSecureUserId(UserHandle.myUserId());
48        } catch (RemoteException e) {
49            throw new IllegalStateException(
50                    "Failed to obtain secure user ID from gatekeeper", e);
51        }
52    }
53}
54