1/** 2 * Copyright (C) 2016 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 com.android.server.fingerprint; 18 19import android.content.Context; 20import android.hardware.biometrics.fingerprint.V2_1.IBiometricsFingerprint; 21import android.hardware.fingerprint.FingerprintManager; 22import android.hardware.fingerprint.IFingerprintServiceReceiver; 23import android.os.IBinder; 24import android.os.RemoteException; 25import android.util.Slog; 26import com.android.internal.logging.MetricsLogger; 27 28/** 29 * A class to keep track of the enumeration state for a given client. 30 */ 31public abstract class EnumerateClient extends ClientMonitor { 32 public EnumerateClient(Context context, long halDeviceId, IBinder token, 33 IFingerprintServiceReceiver receiver, int groupId, int userId, 34 boolean restricted, String owner) { 35 super(context, halDeviceId, token, receiver, userId, groupId, restricted, owner); 36 } 37 38 @Override 39 public int start() { 40 IBiometricsFingerprint daemon = getFingerprintDaemon(); 41 // The fingerprint template ids will be removed when we get confirmation from the HAL 42 try { 43 final int result = daemon.enumerate(); 44 if (result != 0) { 45 Slog.w(TAG, "start enumerate for user " + getTargetUserId() 46 + " failed, result=" + result); 47 MetricsLogger.histogram(getContext(), "fingerprintd_enum_start_error", result); 48 onError(FingerprintManager.FINGERPRINT_ERROR_HW_UNAVAILABLE, 0 /* vendorCode */); 49 return result; 50 } 51 } catch (RemoteException e) { 52 Slog.e(TAG, "startEnumeration failed", e); 53 } 54 return 0; 55 } 56 57 @Override 58 public int stop(boolean initiatedByClient) { 59 if (mAlreadyCancelled) { 60 Slog.w(TAG, "stopEnumerate: already cancelled!"); 61 return 0; 62 } 63 IBiometricsFingerprint daemon = getFingerprintDaemon(); 64 if (daemon == null) { 65 Slog.w(TAG, "stopEnumeration: no fingerprint HAL!"); 66 return ERROR_ESRCH; 67 } 68 try { 69 final int result = daemon.cancel(); 70 if (result != 0) { 71 Slog.w(TAG, "stop enumeration failed, result=" + result); 72 return result; 73 } 74 } catch (RemoteException e) { 75 Slog.e(TAG, "stopEnumeration failed", e); 76 return ERROR_ESRCH; 77 } 78 79 // We don't actually stop enumerate, but inform the client that the cancel operation 80 // succeeded so we can start the next operation. 81 if (initiatedByClient) { 82 onError(FingerprintManager.FINGERPRINT_ERROR_CANCELED, 0 /* vendorCode */); 83 } 84 mAlreadyCancelled = true; 85 return 0; // success 86 } 87 88 @Override 89 public boolean onEnumerationResult(int fingerId, int groupId, int remaining) { 90 IFingerprintServiceReceiver receiver = getReceiver(); 91 if (receiver == null) 92 return true; // client not listening 93 try { 94 receiver.onEnumerated(getHalDeviceId(), fingerId, groupId, remaining); 95 } catch (RemoteException e) { 96 Slog.w(TAG, "Failed to notify enumerated:", e); 97 } 98 return remaining == 0; 99 } 100 101 @Override 102 public boolean onAuthenticated(int fingerId, int groupId) { 103 if (DEBUG) Slog.w(TAG, "onAuthenticated() called for enumerate!"); 104 return true; // Invalid for Enumerate. 105 } 106 107 @Override 108 public boolean onEnrollResult(int fingerId, int groupId, int rem) { 109 if (DEBUG) Slog.w(TAG, "onEnrollResult() called for enumerate!"); 110 return true; // Invalid for Enumerate. 111 } 112 113 @Override 114 public boolean onRemoved(int fingerId, int groupId, int remaining) { 115 if (DEBUG) Slog.w(TAG, "onRemoved() called for enumerate!"); 116 return true; // Invalid for Enumerate. 117 } 118} 119