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/*
* 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;
/**
* Interface containing all of the biometric modality agnostic constants.
* @hide
*/
public interface BiometricConstants {
//
// Error messages from biometric hardware during initilization, enrollment, authentication or
// removal.
//
/**
* The hardware is unavailable. Try again later.
*/
int BIOMETRIC_ERROR_HW_UNAVAILABLE = 1;
/**
* Error state returned when the sensor was unable to process the current image.
*/
int BIOMETRIC_ERROR_UNABLE_TO_PROCESS = 2;
/**
* Error state returned when the current request has been running too long. This is intended to
* prevent programs from waiting for the biometric sensor indefinitely. The timeout is platform
* and sensor-specific, but is generally on the order of 30 seconds.
*/
int BIOMETRIC_ERROR_TIMEOUT = 3;
/**
* Error state returned for operations like enrollment; the operation cannot be completed
* because there's not enough storage remaining to complete the operation.
*/
int BIOMETRIC_ERROR_NO_SPACE = 4;
/**
* The operation was canceled because the biometric sensor is unavailable. For example, this may
* happen when the user is switched, the device is locked or another pending operation prevents
* or disables it.
*/
int BIOMETRIC_ERROR_CANCELED = 5;
/**
* The {@link BiometricManager#remove} call failed. Typically this will happen when the provided
* biometric id was incorrect.
*
* @hide
*/
int BIOMETRIC_ERROR_UNABLE_TO_REMOVE = 6;
/**
* The operation was canceled because the API is locked out due to too many attempts.
* This occurs after 5 failed attempts, and lasts for 30 seconds.
*/
int BIOMETRIC_ERROR_LOCKOUT = 7;
/**
* Hardware vendors may extend this list if there are conditions that do not fall under one of
* the above categories. Vendors are responsible for providing error strings for these errors.
* These messages are typically reserved for internal operations such as enrollment, but may be
* used to express vendor errors not otherwise covered. Applications are expected to show the
* error message string if they happen, but are advised not to rely on the message id since they
* will be device and vendor-specific
*/
int BIOMETRIC_ERROR_VENDOR = 8;
/**
* The operation was canceled because BIOMETRIC_ERROR_LOCKOUT occurred too many times.
* Biometric authentication is disabled until the user unlocks with strong authentication
* (PIN/Pattern/Password)
*/
int BIOMETRIC_ERROR_LOCKOUT_PERMANENT = 9;
/**
* The user canceled the operation. Upon receiving this, applications should use alternate
* authentication (e.g. a password). The application should also provide the means to return to
* biometric authentication, such as a "use <biometric>" button.
*/
int BIOMETRIC_ERROR_USER_CANCELED = 10;
/**
* The user does not have any biometrics enrolled.
*/
int BIOMETRIC_ERROR_NO_BIOMETRICS = 11;
/**
* The device does not have a biometric sensor.
*/
int BIOMETRIC_ERROR_HW_NOT_PRESENT = 12;
/**
* @hide
*/
int BIOMETRIC_ERROR_VENDOR_BASE = 1000;
//
// Image acquisition messages.
//
/**
* The image acquired was good.
*/
int BIOMETRIC_ACQUIRED_GOOD = 0;
/**
* Only a partial biometric image was detected. During enrollment, the user should be informed
* on what needs to happen to resolve this problem, e.g. "press firmly on sensor." (for
* fingerprint)
*/
int BIOMETRIC_ACQUIRED_PARTIAL = 1;
/**
* The biometric image was too noisy to process due to a detected condition or a possibly dirty
* sensor (See {@link #BIOMETRIC_ACQUIRED_IMAGER_DIRTY}).
*/
int BIOMETRIC_ACQUIRED_INSUFFICIENT = 2;
/**
* The biometric image was too noisy due to suspected or detected dirt on the sensor. For
* example, it's reasonable return this after multiple {@link #BIOMETRIC_ACQUIRED_INSUFFICIENT}
* or actual detection of dirt on the sensor (stuck pixels, swaths, etc.). The user is expected
* to take action to clean the sensor when this is returned.
*/
int BIOMETRIC_ACQUIRED_IMAGER_DIRTY = 3;
/**
* The biometric image was unreadable due to lack of motion.
*/
int BIOMETRIC_ACQUIRED_TOO_SLOW = 4;
/**
* The biometric image was incomplete due to quick motion. For example, this could also happen
* if the user moved during acquisition. The user should be asked to repeat the operation more
* slowly.
*/
int BIOMETRIC_ACQUIRED_TOO_FAST = 5;
/**
* Hardware vendors may extend this list if there are conditions that do not fall under one of
* the above categories. Vendors are responsible for providing error strings for these errors.
* @hide
*/
int BIOMETRIC_ACQUIRED_VENDOR = 6;
/**
* @hide
*/
int BIOMETRICT_ACQUIRED_VENDOR_BASE = 1000;
}
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