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A library jar that provides APIs for Applications written for the Google Android Platform.
/*
* Copyright (C) 2020 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.sensors;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.content.Context;
import android.hardware.biometrics.BiometricAuthenticator;
import android.hardware.biometrics.BiometricsProtoEnums;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.Slog;
import com.android.server.biometrics.BiometricsProto;
import java.util.Map;
/**
* A class to keep track of the remove state for a given client.
*/
public abstract class RemovalClient
extends HalClientMonitor implements RemovalConsumer {
private static final String TAG = "Biometrics/RemovalClient";
private final BiometricUtils mBiometricUtils;
private final Map mAuthenticatorIds;
public RemovalClient(@NonNull Context context, @NonNull LazyDaemon lazyDaemon,
@NonNull IBinder token, @NonNull ClientMonitorCallbackConverter listener,
int userId, @NonNull String owner, @NonNull BiometricUtils utils, int sensorId,
@NonNull Map authenticatorIds, int statsModality) {
super(context, lazyDaemon, token, listener, userId, owner, 0 /* cookie */, sensorId,
statsModality, BiometricsProtoEnums.ACTION_REMOVE,
BiometricsProtoEnums.CLIENT_UNKNOWN);
mBiometricUtils = utils;
mAuthenticatorIds = authenticatorIds;
}
@Override
public void unableToStart() {
// Nothing to do here
}
@Override
public void start(@NonNull Callback callback) {
super.start(callback);
// The biometric template ids will be removed when we get confirmation from the HAL
startHalOperation();
}
@Override
public void onRemoved(@NonNull BiometricAuthenticator.Identifier identifier, int remaining) {
Slog.d(TAG, "onRemoved: " + identifier.getBiometricId() + " remaining: " + remaining);
mBiometricUtils.removeBiometricForUser(getContext(), getTargetUserId(),
identifier.getBiometricId());
try {
if (getListener() != null) {
getListener().onRemoved(identifier, remaining);
}
} catch (RemoteException e) {
Slog.w(TAG, "Failed to notify Removed:", e);
}
if (remaining == 0) {
if (mBiometricUtils.getBiometricsForUser(getContext(), getTargetUserId()).isEmpty()) {
Slog.d(TAG, "Last biometric removed for user: " + getTargetUserId());
// When the last biometric of a group is removed, update the authenticator id.
// Note that multiple ClientMonitors may be cause onRemoved (e.g. internal
// cleanup).
mAuthenticatorIds.put(getTargetUserId(), 0L);
}
mCallback.onClientFinished(this, true /* success */);
}
}
@Override
public int getProtoEnum() {
return BiometricsProto.CM_REMOVE;
}
@Override
public boolean interruptsPrecedingClients() {
return true;
}
}