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.fingerprint.FingerprintManager; 21import android.hardware.fingerprint.IFingerprintDaemon; 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 userId, int groupId, 34 boolean restricted, String owner) { 35 super(context, halDeviceId, token, receiver, userId, groupId, restricted, owner); 36 } 37 38 @Override 39 public int start() { 40 IFingerprintDaemon 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); 49 return result; 50 } 51 } catch (RemoteException e) { 52 Slog.e(TAG, "startRemove failed", e); 53 } 54 return 0; 55 } 56 57 @Override 58 public int stop(boolean initiatedByClient) { 59 IFingerprintDaemon daemon = getFingerprintDaemon(); 60 if (daemon == null) { 61 Slog.w(TAG, "stopAuthentication: no fingeprintd!"); 62 return ERROR_ESRCH; 63 } 64 try { 65 final int result = daemon.cancelEnumeration(); 66 if (result != 0) { 67 Slog.w(TAG, "stop enumeration failed, result=" + result); 68 return result; 69 } 70 } catch (RemoteException e) { 71 Slog.e(TAG, "stop enumeration failed", e); 72 return ERROR_ESRCH; 73 } 74 // We don't actually stop enumerate, but inform the client that the cancel operation 75 // succeeded so we can start the next operation. 76 if (initiatedByClient) { 77 onError(FingerprintManager.FINGERPRINT_ERROR_CANCELED); 78 } 79 return 0; // success 80 } 81 82 @Override 83 public boolean onEnumerationResult(int fingerId, int groupId) { 84 IFingerprintServiceReceiver receiver = getReceiver(); 85 if (receiver == null) 86 return true; // client not listening 87 try { 88 receiver.onRemoved(getHalDeviceId(), fingerId, groupId); 89 } catch (RemoteException e) { 90 Slog.w(TAG, "Failed to notify enumerated:", e); 91 } 92 return fingerId == 0; // done when id hits 0 93 } 94} 95