1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/*
* Copyright (C) 2020 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.security;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.hardware.security.keymint.HardwareAuthToken;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.ServiceSpecificException;
import android.security.authorization.IKeystoreAuthorization;
import android.security.authorization.LockScreenEvent;
import android.system.keystore2.ResponseCode;
import android.util.Log;
/**
* @hide This is the client side for IKeystoreAuthorization AIDL.
* It shall only be used by biometric authentication providers and Gatekeeper.
*/
public class Authorization {
private static final String TAG = "KeystoreAuthorization";
public static final int SYSTEM_ERROR = ResponseCode.SYSTEM_ERROR;
private static IKeystoreAuthorization getService() {
return IKeystoreAuthorization.Stub.asInterface(
ServiceManager.checkService("android.security.authorization"));
}
/**
* Adds an auth token to keystore2.
*
* @param authToken created by Android authenticators.
* @return 0 if successful or {@code ResponseCode.SYSTEM_ERROR}.
*/
public static int addAuthToken(@NonNull HardwareAuthToken authToken) {
try {
getService().addAuthToken(authToken);
return 0;
} catch (RemoteException | NullPointerException e) {
Log.w(TAG, "Can not connect to keystore", e);
return SYSTEM_ERROR;
} catch (ServiceSpecificException e) {
return e.errorCode;
}
}
/**
* Add an auth token to Keystore 2.0 in the legacy serialized auth token format.
* @param authToken
* @return 0 if successful or a {@code ResponseCode}.
*/
public static int addAuthToken(@NonNull byte[] authToken) {
return addAuthToken(AuthTokenUtils.toHardwareAuthToken(authToken));
}
/**
* Informs keystore2 about lock screen event.
*
* @param locked - whether it is a lock (true) or unlock (false) event
* @param syntheticPassword - if it is an unlock event with the password, pass the synthetic
* password provided by the LockSettingService
*
* @return 0 if successful or a {@code ResponseCode}.
*/
public static int onLockScreenEvent(@NonNull boolean locked, @NonNull int userId,
@Nullable byte[] syntheticPassword) {
try {
if (locked) {
getService().onLockScreenEvent(LockScreenEvent.LOCK, userId, null);
} else {
getService().onLockScreenEvent(LockScreenEvent.UNLOCK, userId, syntheticPassword);
}
return 0;
} catch (RemoteException | NullPointerException e) {
Log.w(TAG, "Can not connect to keystore", e);
return SYSTEM_ERROR;
} catch (ServiceSpecificException e) {
return e.errorCode;
}
}
}
|
