| /* |
| * Copyright (C) 2018 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 com.android.server.biometrics; |
| |
| import android.content.Context; |
| import android.hardware.biometrics.BiometricAuthenticator; |
| import android.hardware.biometrics.BiometricConstants; |
| import android.hardware.biometrics.BiometricsProtoEnums; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.util.Slog; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * A class to keep track of the remove state for a given client. |
| */ |
| public abstract class RemovalClient extends ClientMonitor { |
| private final int mBiometricId; |
| private final BiometricUtils mBiometricUtils; |
| |
| public RemovalClient(Context context, Metrics metrics, |
| BiometricServiceBase.DaemonWrapper daemon, long halDeviceId, IBinder token, |
| BiometricServiceBase.ServiceListener listener, int biometricId, int groupId, int userId, |
| boolean restricted, String owner, BiometricUtils utils) { |
| super(context, metrics, daemon, halDeviceId, token, listener, userId, groupId, restricted, |
| owner, 0 /* cookie */); |
| mBiometricId = biometricId; |
| mBiometricUtils = utils; |
| } |
| |
| @Override |
| protected int statsAction() { |
| return BiometricsProtoEnums.ACTION_REMOVE; |
| } |
| |
| @Override |
| public int start() { |
| // The biometric template ids will be removed when we get confirmation from the HAL |
| try { |
| final int result = getDaemonWrapper().remove(getGroupId(), mBiometricId); |
| if (result != 0) { |
| Slog.w(getLogTag(), "startRemove with id = " + mBiometricId + " failed, result=" + |
| result); |
| mMetricsLogger.histogram(mMetrics.tagRemoveStartError(), result); |
| onError(getHalDeviceId(), BiometricConstants.BIOMETRIC_ERROR_HW_UNAVAILABLE, |
| 0 /* vendorCode */); |
| return result; |
| } |
| } catch (RemoteException e) { |
| Slog.e(getLogTag(), "startRemove failed", e); |
| } |
| return 0; |
| } |
| |
| @Override |
| public int stop(boolean initiatedByClient) { |
| if (mAlreadyCancelled) { |
| Slog.w(getLogTag(), "stopRemove: already cancelled!"); |
| return 0; |
| } |
| |
| try { |
| final int result = getDaemonWrapper().cancel(); |
| if (result != 0) { |
| Slog.w(getLogTag(), "stopRemoval failed, result=" + result); |
| return result; |
| } |
| if (DEBUG) Slog.w(getLogTag(), "client " + getOwnerString() + " is no longer removing"); |
| } catch (RemoteException e) { |
| Slog.e(getLogTag(), "stopRemoval failed", e); |
| return ERROR_ESRCH; |
| } |
| mAlreadyCancelled = true; |
| return 0; // success |
| } |
| |
| /* |
| * @return true if we're done. |
| */ |
| private boolean sendRemoved(BiometricAuthenticator.Identifier identifier, |
| int remaining) { |
| try { |
| getListener().onRemoved(identifier, remaining); |
| } catch (RemoteException e) { |
| Slog.w(getLogTag(), "Failed to notify Removed:", e); |
| } |
| return remaining == 0; |
| } |
| |
| @Override |
| public boolean onRemoved(BiometricAuthenticator.Identifier identifier, int remaining) { |
| if (identifier.getBiometricId() != 0) { |
| mBiometricUtils.removeBiometricForUser(getContext(), getTargetUserId(), |
| identifier.getBiometricId()); |
| } |
| return sendRemoved(identifier, remaining); |
| } |
| |
| @Override |
| public boolean onEnrollResult(BiometricAuthenticator.Identifier identifier, int rem) { |
| if (DEBUG) Slog.w(getLogTag(), "onEnrollResult() called for remove!"); |
| return true; // Invalid for Remove |
| } |
| |
| @Override |
| public boolean onAuthenticated(BiometricAuthenticator.Identifier identifier, |
| boolean authenticated, ArrayList<Byte> token) { |
| if (DEBUG) Slog.w(getLogTag(), "onAuthenticated() called for remove!"); |
| return true; // Invalid for Remove. |
| } |
| |
| @Override |
| public boolean onEnumerationResult(BiometricAuthenticator.Identifier identifier, |
| int remaining) { |
| if (DEBUG) Slog.w(getLogTag(), "onEnumerationResult() called for remove!"); |
| return true; // Invalid for Remove. |
| } |
| } |