1 /*
2  * Copyright (C) 2021 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 
17 package com.android.server.biometrics;
18 
19 import static org.mockito.ArgumentMatchers.any;
20 import static org.mockito.ArgumentMatchers.anyInt;
21 import static org.mockito.ArgumentMatchers.eq;
22 import static org.mockito.Mockito.mock;
23 import static org.mockito.Mockito.never;
24 import static org.mockito.Mockito.verify;
25 import static org.mockito.Mockito.when;
26 
27 import android.annotation.NonNull;
28 import android.content.Context;
29 import android.hardware.biometrics.BiometricAuthenticator;
30 import android.hardware.biometrics.BiometricManager.Authenticators;
31 import android.hardware.biometrics.IBiometricAuthenticator;
32 import android.hardware.biometrics.IInvalidationCallback;
33 import android.platform.test.annotations.Presubmit;
34 
35 import androidx.test.filters.SmallTest;
36 
37 import com.android.server.biometrics.BiometricService.InvalidationTracker;
38 
39 import org.junit.Before;
40 import org.junit.Test;
41 import org.mockito.Mock;
42 import org.mockito.MockitoAnnotations;
43 
44 import java.util.ArrayList;
45 
46 @Presubmit
47 @SmallTest
48 public class InvalidationTrackerTest {
49 
50     @Mock
51     private Context mContext;
52 
53     @Before
setUp()54     public void setUp() {
55         MockitoAnnotations.initMocks(this);
56     }
57 
58     @Test
testCallbackReceived_whenAllStrongSensorsInvalidated()59     public void testCallbackReceived_whenAllStrongSensorsInvalidated() throws Exception {
60         final IBiometricAuthenticator authenticator1 = mock(IBiometricAuthenticator.class);
61         when(authenticator1.hasEnrolledTemplates(anyInt(), any())).thenReturn(true);
62         final TestSensor sensor1 = new TestSensor(mContext, 0 /* id */,
63                 BiometricAuthenticator.TYPE_FINGERPRINT, Authenticators.BIOMETRIC_STRONG,
64                 authenticator1);
65 
66         final IBiometricAuthenticator authenticator2 = mock(IBiometricAuthenticator.class);
67         when(authenticator2.hasEnrolledTemplates(anyInt(), any())).thenReturn(true);
68         final TestSensor sensor2 = new TestSensor(mContext, 1 /* id */,
69                 BiometricAuthenticator.TYPE_FINGERPRINT, Authenticators.BIOMETRIC_STRONG,
70                 authenticator2);
71 
72         final IBiometricAuthenticator authenticator3 = mock(IBiometricAuthenticator.class);
73         when(authenticator3.hasEnrolledTemplates(anyInt(), any())).thenReturn(true);
74         final TestSensor sensor3 = new TestSensor(mContext, 2 /* id */,
75                 BiometricAuthenticator.TYPE_FACE, Authenticators.BIOMETRIC_STRONG,
76                 authenticator3);
77 
78         final IBiometricAuthenticator authenticator4 = mock(IBiometricAuthenticator.class);
79         when(authenticator4.hasEnrolledTemplates(anyInt(), any())).thenReturn(true);
80         final TestSensor sensor4 = new TestSensor(mContext, 3 /* id */,
81                 BiometricAuthenticator.TYPE_FACE, Authenticators.BIOMETRIC_WEAK,
82                 authenticator4);
83 
84         final ArrayList<BiometricSensor> sensors = new ArrayList<>();
85         sensors.add(sensor1);
86         sensors.add(sensor2);
87         sensors.add(sensor3);
88         sensors.add(sensor4);
89 
90         final IInvalidationCallback callback = mock(IInvalidationCallback.class);
91         final InvalidationTracker tracker =
92                 InvalidationTracker.start(mock(Context.class), sensors, 0 /* userId */,
93                         0 /* fromSensorId */, callback);
94 
95         // The sensor which the request originated from should not be requested to invalidate
96         // its authenticatorId.
97         verify(authenticator1, never()).invalidateAuthenticatorId(anyInt(), any());
98 
99         // All other strong sensors should be requested to invalidate authenticatorId
100         verify(authenticator2).invalidateAuthenticatorId(eq(0) /* userId */, any());
101         verify(authenticator3).invalidateAuthenticatorId(eq(0) /* userId */, any());
102 
103         // Weak sensors are not requested to invalidate authenticatorId
104         verify(authenticator4, never()).invalidateAuthenticatorId(anyInt(), any());
105 
106         // Client is not notified until invalidation for all required sensors have completed
107         verify(callback, never()).onCompleted();
108         tracker.onInvalidated(1);
109         verify(callback, never()).onCompleted();
110         tracker.onInvalidated(2);
111         verify(callback).onCompleted();
112     }
113 
114     private static class TestSensor extends BiometricSensor {
115 
TestSensor(@onNull Context context, int id, int modality, int strength, @NonNull IBiometricAuthenticator impl)116         TestSensor(@NonNull Context context, int id, int modality, int strength,
117                 @NonNull IBiometricAuthenticator impl) {
118             super(context, id, modality, strength, impl);
119         }
120 
121         @Override
confirmationAlwaysRequired(int userId)122         boolean confirmationAlwaysRequired(int userId) {
123             return false;
124         }
125 
126         @Override
confirmationSupported()127         boolean confirmationSupported() {
128             return false;
129         }
130     }
131 }
132