| /* |
| * 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 android.hardware.biometrics; |
| |
| import static android.Manifest.permission.USE_BIOMETRIC; |
| import static android.Manifest.permission.USE_BIOMETRIC_INTERNAL; |
| |
| import android.annotation.IntDef; |
| import android.annotation.RequiresPermission; |
| import android.content.Context; |
| import android.content.pm.PackageManager; |
| import android.os.RemoteException; |
| import android.util.Slog; |
| |
| /** |
| * A class that contains biometric utilities. For authentication, see {@link BiometricPrompt}. |
| */ |
| public class BiometricManager { |
| |
| private static final String TAG = "BiometricManager"; |
| |
| /** |
| * No error detected. |
| */ |
| public static final int BIOMETRIC_SUCCESS = |
| BiometricConstants.BIOMETRIC_SUCCESS; |
| |
| /** |
| * The hardware is unavailable. Try again later. |
| */ |
| public static final int BIOMETRIC_ERROR_UNAVAILABLE = |
| BiometricConstants.BIOMETRIC_ERROR_HW_UNAVAILABLE; |
| |
| /** |
| * The user does not have any biometrics enrolled. |
| */ |
| public static final int BIOMETRIC_ERROR_NO_BIOMETRICS = |
| BiometricConstants.BIOMETRIC_ERROR_NO_BIOMETRICS; |
| |
| /** |
| * There is no biometric hardware. |
| */ |
| public static final int BIOMETRIC_ERROR_NO_HARDWARE = |
| BiometricConstants.BIOMETRIC_ERROR_HW_NOT_PRESENT; |
| |
| @IntDef({BIOMETRIC_SUCCESS, |
| BIOMETRIC_ERROR_UNAVAILABLE, |
| BIOMETRIC_ERROR_NO_BIOMETRICS, |
| BIOMETRIC_ERROR_NO_HARDWARE}) |
| @interface BiometricError {} |
| |
| private final Context mContext; |
| private final IBiometricService mService; |
| private final boolean mHasHardware; |
| |
| /** |
| * @param context |
| * @return |
| * @hide |
| */ |
| public static boolean hasBiometrics(Context context) { |
| final PackageManager pm = context.getPackageManager(); |
| return pm.hasSystemFeature(PackageManager.FEATURE_FINGERPRINT) |
| || pm.hasSystemFeature(PackageManager.FEATURE_IRIS) |
| || pm.hasSystemFeature(PackageManager.FEATURE_FACE); |
| } |
| |
| /** |
| * @hide |
| * @param context |
| * @param service |
| */ |
| public BiometricManager(Context context, IBiometricService service) { |
| mContext = context; |
| mService = service; |
| |
| mHasHardware = hasBiometrics(context); |
| } |
| |
| /** |
| * Determine if biometrics can be used. In other words, determine if {@link BiometricPrompt} |
| * can be expected to be shown (hardware available, templates enrolled, user-enabled). |
| * |
| * @return Returns {@link #BIOMETRIC_ERROR_NO_BIOMETRICS} if the user does not have any |
| * enrolled, or {@link #BIOMETRIC_ERROR_UNAVAILABLE} if none are currently |
| * supported/enabled. Returns {@link #BIOMETRIC_SUCCESS} if a biometric can currently be |
| * used (enrolled and available). |
| */ |
| @RequiresPermission(USE_BIOMETRIC) |
| public @BiometricError int canAuthenticate() { |
| if (mService != null) { |
| try { |
| return mService.canAuthenticate(mContext.getOpPackageName()); |
| } catch (RemoteException e) { |
| throw e.rethrowFromSystemServer(); |
| } |
| } else { |
| if (!mHasHardware) { |
| return BIOMETRIC_ERROR_NO_HARDWARE; |
| } else { |
| Slog.w(TAG, "hasEnrolledBiometrics(): Service not connected"); |
| return BIOMETRIC_ERROR_UNAVAILABLE; |
| } |
| } |
| } |
| |
| /** |
| * Listens for changes to biometric eligibility on keyguard from user settings. |
| * @param callback |
| * @hide |
| */ |
| @RequiresPermission(USE_BIOMETRIC_INTERNAL) |
| public void registerEnabledOnKeyguardCallback(IBiometricEnabledOnKeyguardCallback callback) { |
| if (mService != null) { |
| try { |
| mService.registerEnabledOnKeyguardCallback(callback); |
| } catch (RemoteException e) { |
| throw e.rethrowFromSystemServer(); |
| } |
| } else { |
| Slog.w(TAG, "registerEnabledOnKeyguardCallback(): Service not connected"); |
| } |
| } |
| |
| /** |
| * Sets the active user. |
| * @hide |
| */ |
| @RequiresPermission(USE_BIOMETRIC_INTERNAL) |
| public void setActiveUser(int userId) { |
| if (mService != null) { |
| try { |
| mService.setActiveUser(userId); |
| } catch (RemoteException e) { |
| throw e.rethrowFromSystemServer(); |
| } |
| } else { |
| Slog.w(TAG, "setActiveUser(): Service not connected"); |
| } |
| } |
| } |
| |