1 /* 2 * Copyright (C) 2020 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.sensors; 18 19 import android.util.SparseArray; 20 21 /** 22 * Tracks biometric performance across sensors and users. 23 */ 24 public class PerformanceTracker { 25 26 private static final String TAG = "PerformanceTracker"; 27 // Keyed by SensorId 28 private static SparseArray<PerformanceTracker> sTrackers; 29 getInstanceForSensorId(int sensorId)30 public static PerformanceTracker getInstanceForSensorId(int sensorId) { 31 if (sTrackers == null) { 32 sTrackers = new SparseArray<>(); 33 } 34 35 if (!sTrackers.contains(sensorId)) { 36 sTrackers.put(sensorId, new PerformanceTracker()); 37 } 38 return sTrackers.get(sensorId); 39 } 40 41 private static class Info { 42 int mAccept; // number of accepted biometrics 43 int mReject; // number of rejected biometrics 44 int mAcquire; // total number of acquisitions. 45 46 int mAcceptCrypto; 47 int mRejectCrypto; 48 int mAcquireCrypto; 49 50 int mTimedLockout; // total number of lockouts 51 int mPermanentLockout; // total number of permanent lockouts 52 } 53 54 // Keyed by UserId 55 private final SparseArray<Info> mAllUsersInfo; 56 private int mHALDeathCount; 57 PerformanceTracker()58 private PerformanceTracker() { 59 mAllUsersInfo = new SparseArray<>(); 60 } 61 createUserEntryIfNecessary(int userId)62 private void createUserEntryIfNecessary(int userId) { 63 if (!mAllUsersInfo.contains(userId)) { 64 mAllUsersInfo.put(userId, new Info()); 65 } 66 } 67 incrementAuthForUser(int userId, boolean accepted)68 public void incrementAuthForUser(int userId, boolean accepted) { 69 createUserEntryIfNecessary(userId); 70 71 if (accepted) { 72 mAllUsersInfo.get(userId).mAccept++; 73 } else { 74 mAllUsersInfo.get(userId).mReject++; 75 } 76 } 77 incrementCryptoAuthForUser(int userId, boolean accepted)78 void incrementCryptoAuthForUser(int userId, boolean accepted) { 79 createUserEntryIfNecessary(userId); 80 81 if (accepted) { 82 mAllUsersInfo.get(userId).mAcceptCrypto++; 83 } else { 84 mAllUsersInfo.get(userId).mRejectCrypto++; 85 } 86 } 87 incrementAcquireForUser(int userId, boolean isCrypto)88 void incrementAcquireForUser(int userId, boolean isCrypto) { 89 createUserEntryIfNecessary(userId); 90 91 if (isCrypto) { 92 mAllUsersInfo.get(userId).mAcquireCrypto++; 93 } else { 94 mAllUsersInfo.get(userId).mAcquire++; 95 } 96 } 97 incrementTimedLockoutForUser(int userId)98 void incrementTimedLockoutForUser(int userId) { 99 createUserEntryIfNecessary(userId); 100 101 mAllUsersInfo.get(userId).mTimedLockout++; 102 } 103 incrementPermanentLockoutForUser(int userId)104 void incrementPermanentLockoutForUser(int userId) { 105 createUserEntryIfNecessary(userId); 106 107 mAllUsersInfo.get(userId).mPermanentLockout++; 108 } 109 incrementHALDeathCount()110 public void incrementHALDeathCount() { 111 mHALDeathCount++; 112 } 113 clear()114 public void clear() { 115 mAllUsersInfo.clear(); 116 mHALDeathCount = 0; 117 } 118 getAcceptForUser(int userId)119 public int getAcceptForUser(int userId) { 120 return mAllUsersInfo.contains(userId) ? mAllUsersInfo.get(userId).mAccept : 0; 121 } 122 getRejectForUser(int userId)123 public int getRejectForUser(int userId) { 124 return mAllUsersInfo.contains(userId) ? mAllUsersInfo.get(userId).mReject : 0; 125 } 126 getAcquireForUser(int userId)127 public int getAcquireForUser(int userId) { 128 return mAllUsersInfo.contains(userId) ? mAllUsersInfo.get(userId).mAcquire : 0; 129 } 130 getAcceptCryptoForUser(int userId)131 public int getAcceptCryptoForUser(int userId) { 132 return mAllUsersInfo.contains(userId) ? mAllUsersInfo.get(userId).mAcceptCrypto : 0; 133 } 134 getRejectCryptoForUser(int userId)135 public int getRejectCryptoForUser(int userId) { 136 return mAllUsersInfo.contains(userId) ? mAllUsersInfo.get(userId).mRejectCrypto : 0; 137 } 138 getAcquireCryptoForUser(int userId)139 public int getAcquireCryptoForUser(int userId) { 140 return mAllUsersInfo.contains(userId) ? mAllUsersInfo.get(userId).mAcquireCrypto : 0; 141 } 142 getTimedLockoutForUser(int userId)143 public int getTimedLockoutForUser(int userId) { 144 return mAllUsersInfo.contains(userId) ? mAllUsersInfo.get(userId).mTimedLockout : 0; 145 } 146 getPermanentLockoutForUser(int userId)147 public int getPermanentLockoutForUser(int userId) { 148 return mAllUsersInfo.contains(userId) ? mAllUsersInfo.get(userId).mPermanentLockout : 0; 149 } 150 getHALDeathCount()151 public int getHALDeathCount() { 152 return mHALDeathCount; 153 } 154 } 155