Remove SessionState from IFingerprint

Bug: 183570051
Test: atest VtsHalBiometricsFingerprintTargetTest
Change-Id: I82edc57b7bb36d9688428bc7a65470145aadcb89
This commit is contained in:
Ilya Matyukhin
2021-03-23 17:15:08 -07:00
parent a42f20168d
commit 2ad929d986
7 changed files with 85 additions and 273 deletions

View File

@@ -34,17 +34,17 @@
package android.hardware.biometrics.fingerprint;
@VintfStability
interface ISession {
void generateChallenge(in int cookie);
void revokeChallenge(in int cookie, in long challenge);
android.hardware.biometrics.common.ICancellationSignal enroll(in int cookie, in android.hardware.keymaster.HardwareAuthToken hat);
android.hardware.biometrics.common.ICancellationSignal authenticate(in int cookie, in long operationId);
android.hardware.biometrics.common.ICancellationSignal detectInteraction(in int cookie);
void enumerateEnrollments(in int cookie);
void removeEnrollments(in int cookie, in int[] enrollmentIds);
void getAuthenticatorId(in int cookie);
void invalidateAuthenticatorId(in int cookie);
void resetLockout(in int cookie, in android.hardware.keymaster.HardwareAuthToken hat);
void close(in int cookie);
void generateChallenge();
void revokeChallenge(in long challenge);
android.hardware.biometrics.common.ICancellationSignal enroll(in android.hardware.keymaster.HardwareAuthToken hat);
android.hardware.biometrics.common.ICancellationSignal authenticate(in long operationId);
android.hardware.biometrics.common.ICancellationSignal detectInteraction();
void enumerateEnrollments();
void removeEnrollments(in int[] enrollmentIds);
void getAuthenticatorId();
void invalidateAuthenticatorId();
void resetLockout(in android.hardware.keymaster.HardwareAuthToken hat);
void close();
void onPointerDown(in int pointerId, in int x, in int y, in float minor, in float major);
void onPointerUp(in int pointerId);
void onUiReady();

View File

@@ -34,7 +34,6 @@
package android.hardware.biometrics.fingerprint;
@VintfStability
interface ISessionCallback {
void onStateChanged(in int cookie, in android.hardware.biometrics.fingerprint.SessionState state);
void onChallengeGenerated(in long challenge);
void onChallengeRevoked(in long challenge);
void onAcquired(in android.hardware.biometrics.fingerprint.AcquiredInfo info, in int vendorCode);

View File

@@ -1,49 +0,0 @@
/*
* 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.
*/
///////////////////////////////////////////////////////////////////////////////
// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE. //
///////////////////////////////////////////////////////////////////////////////
// This file is a snapshot of an AIDL file. Do not edit it manually. There are
// two cases:
// 1). this is a frozen version file - do not edit this in any case.
// 2). this is a 'current' file. If you make a backwards compatible change to
// the interface (from the latest frozen version), the build system will
// prompt you to update this file with `m <name>-update-api`.
//
// You must not make a backward incompatible change to any AIDL file built
// with the aidl_interface module type with versions property set. The module
// type is used to build AIDL files in a way that they can be used across
// independently updatable components of the system. If a device is shipped
// with such a backward incompatible change, it has a high risk of breaking
// later when a module using the interface is updated, e.g., Mainline modules.
package android.hardware.biometrics.fingerprint;
@Backing(type="byte") @VintfStability
enum SessionState {
IDLING = 0,
CLOSED = 1,
GENERATING_CHALLENGE = 2,
REVOKING_CHALLENGE = 3,
ENROLLING = 4,
AUTHENTICATING = 5,
DETECTING_INTERACTION = 6,
ENUMERATING_ENROLLMENTS = 7,
REMOVING_ENROLLMENTS = 8,
GETTING_AUTHENTICATOR_ID = 9,
INVALIDATING_AUTHENTICATOR_ID = 10,
RESETTING_LOCKOUT = 11,
}

View File

@@ -32,27 +32,14 @@ interface IFingerprint {
/**
* createSession:
*
* Creates a session which can then be used by the framework to perform operations such as
* enroll, authenticate, etc for the given sensorId and userId.
* Creates a instance of ISession which can be used by the framework to perform operations
* such as ISession#enroll, ISession#authenticate, etc. for the given sensorId and userId.
*
* Calling this method while there is an active session is considered an error. If the
* framework is in a bad state and for some reason cannot close its session, it should use
* the reset method below.
*
* A physical sensor identified by sensorId typically supports only a single in-flight session
* at a time. As such, if a session is currently in a state other than SessionState::IDLING, the
* HAL MUST finish or cancel the current operation and return to SessionState::IDLING before the
* new session is created. For example:
* 1) If a session for sensorId=0, userId=0 is currently in a cancellable state (see
* ICancellationSignal) such as SessionState::AUTHENTICATING and the framework requests a
* new session for sensorId=0, userId=10, the HAL must end the current session with
* Error::CANCELED, invoke ISessionCallback#onStateChanged with SessionState::IDLING, and
* then return a new session for sensorId=0, userId=10.
* 2) If a session for sensorId=0, userId=0 is currently in a non-cancellable state such as
* SessionState::REMOVING_ENROLLMENTS, and the framework requests a new session for
* sensorId=0, userId=10, the HAL must finish the current operation before invoking
* ISessionCallback#onStateChanged with SessionState::IDLING, and return a new session for
* sensorId=0, userId=10.
* Calling this method while there is an active session is considered an error. If the framework
* wants to create a new session when it already has an active session, it must first cancel the
* current operation if it's cancellable, or wait until it completes. Then, the framework must
* explicitly close the session with ISession#close. Once the framework receives
* ISessionCallback#onSessionClosed, a new session can be created.
*
* Implementations must store user-specific state or metadata in /data/vendor_de/<user>/fpdata
* as specified by the SeLinux policy. This directory is created/removed by vold (see

View File

@@ -22,23 +22,28 @@ import android.hardware.keymaster.HardwareAuthToken;
/**
* Operations that can be performed for unique sessions retrieved via IFingerprint#createSession.
* Methods defined within this interface can be split into the following categories:
* 1) Methods associated with a state (see the SessionState enum). State-based operations are
* handled by the HAL in FIFO order.
* 1a) Cancellable state-based operations. If a cancellable operation is in-progress and the
* framework requests a subsequent state-based operation, the implementation should finish
* the operation via ISessionCallback#onError with Error::CANCELED.
* 1b) Non-cancellable state-based operations. These operations should fully complete before the
* next state-based operation can be started.
* 2) Methods without a state. These methods may be invoked by the framework depending on its
* use case. For example on devices with sensors of FingerprintSensorType::UNDER_DISPLAY_*,
* ISession#onFingerDown may be invoked while the HAL is in SessionState::ENROLLING,
* SessionState::AUTHENTICATING, or SessionState::DETECTING_INTERACTION.
* 1) Non-interrupting operations. These operations are handled by the HAL in FIFO order.
* 1a) Cancellable operations. These are usually the operations that can execute for several
* minutes. To allow for cancellation, they return an instance of ICancellationSignal that
* lets the framework cancel them by calling ICancellationSignal#cancel. If such an operation
* is cancelled, it must notify the framework by calling ISessionCallback#onError with
* Error::CANCELED.
* 1b) Non-cancellable operations. Such operations cannot be cancelled once started.
* 2) Interrupting operations. These operations may be invoked by the framework immediately,
* regardless of whether another operation is executing. For example, on devices with sensors
* of FingerprintSensorType::UNDER_DISPLAY_*, ISession#onFingerDown may be invoked while the
* HAL is executing ISession#enroll, ISession#authenticate or ISession#detectInteraction.
*
* If the HAL has multiple operations in its queue, it is not required to notify the framework
* of SessionState::IDLING between each operation. However, it must notify the framework when all
* work is completed. See ISessionCallback#onStateChanged. For example, the following is a valid
* sequence of ISessionCallback#onStateChanged invocations: SessionState::IDLING -->
* SessionState::ENROLLING --> SessionState::ENUMERATING_ENROLLMENTS --> SessionState::IDLING.
* The lifecycle of a non-interrupting operation ends when one of its terminal callbacks is called.
* For example, ISession#authenticate is considered completed when either of the following callbacks
* is called: ISessionCallback#onError or ISessionCallback#onAuthenticationSucceeded.
*
* The lifecycle of an interrupting operation ends when it returns. Interrupting operations do not
* have callbacks.
*
* ISession only supports execution of one non-interrupting operation at a time, regardless of
* whether it's cancellable. The framework must wait for a corresponding callback indicating the end of
* the current non-interrupting operation before a new non-interrupting operation can be started.
*/
@VintfStability
interface ISession {
@@ -84,9 +89,8 @@ interface ISession {
* | 0 | 10 | <Time4> | <Random4> |
* ----------------------------------------------
*
* @param cookie A unique number identifying this operation
*/
void generateChallenge(in int cookie);
void generateChallenge();
/**
* revokeChallenge:
@@ -95,23 +99,17 @@ interface ISession {
* parameters is requested, the implementation must still notify the framework using the
* provided callback.
*
* @param cookie A unique number identifying this operation
* @param challenge Challenge that should be revoked.
*/
void revokeChallenge(in int cookie, in long challenge);
void revokeChallenge(in long challenge);
/**
* enroll:
*
* A request to add a fingerprint enrollment.
*
* Once the HAL is able to start processing the enrollment request, it must notify the framework
* via ISessionCallback#onStateChanged with SessionState::ENROLLING.
*
* At any point during enrollment, if a non-recoverable error occurs, the HAL must notify the
* framework via ISessionCallback#onError with the applicable enrollment-specific error, and
* then send ISessionCallback#onStateChanged(cookie, SessionState::IDLING) if no subsequent
* operation is in the queue.
* framework via ISessionCallback#onError with the applicable enrollment-specific error.
*
* Before capturing fingerprint data, the implementation must first verify the authenticity and
* integrity of the provided HardwareAuthToken. In addition, it must check that the challenge
@@ -132,24 +130,17 @@ interface ISession {
* implementation MUST update and associate this (sensorId, userId) pair with a new new
* entropy-encoded random identifier. See ISession#getAuthenticatorId for more information.
*
* @param cookie An identifier used to track subsystem operations related to this call path. The
* client must guarantee that it is unique per ISession.
* @param hat See above documentation.
*/
ICancellationSignal enroll(in int cookie, in HardwareAuthToken hat);
ICancellationSignal enroll(in HardwareAuthToken hat);
/**
* authenticate:
*
* A request to start looking for fingerprints to authenticate.
*
* Once the HAL is able to start processing the authentication request, it must notify framework
* via ISessionCallback#onStateChanged with SessionState::AUTHENTICATING.
*
* At any point during authentication, if a non-recoverable error occurs, the HAL must notify
* the framework via ISessionCallback#onError with the applicable authentication-specific error,
* and then send ISessionCallback#onStateChanged(cookie, SessionState::IDLING) if no
* subsequent operation is in the queue.
* the framework via ISessionCallback#onError with the applicable authentication-specific error.
*
* During authentication, the implementation may notify the framework via
* ISessionCallback#onAcquired with messages that may be used to guide the user. This callback
@@ -171,8 +162,6 @@ interface ISession {
* must be set with the operationId passed in during #authenticate. If the sensor is NOT
* SensorStrength::STRONG, the HardwareAuthToken MUST be null.
*
* @param cookie An identifier used to track subsystem operations related to this call path. The
* client must guarantee that it is unique per ISession.
* @param operationId For sensors configured as SensorStrength::STRONG, this must be used ONLY
* upon successful authentication and wrapped in the HardwareAuthToken's
* "challenge" field and sent to the framework via
@@ -184,7 +173,7 @@ interface ISession {
* setUserAuthenticationParameters in KeyGenParameterSpec.Builder and
* KeyProtection.Builder.
*/
ICancellationSignal authenticate(in int cookie, in long operationId);
ICancellationSignal authenticate(in long operationId);
/**
* detectInteraction:
@@ -193,17 +182,12 @@ interface ISession {
* if SensorProps#supportsDetectInteraction is true. If invoked on implementations that do not
* support this functionality, the HAL must respond with ISession#onError(UNABLE_TO_PROCESS, 0).
*
* Once the HAL is able to start processing this request, it must notify the framework via
* ISessionCallback#onStateChanged with SessionState::DETECTING_INTERACTION.
*
* The framework will use this method in cases where determing user presence is required, but
* identifying/authentication is not. For example, when the device is encrypted (first boot) or
* in lockdown mode.
*
* At any point during detectInteraction, if a non-recoverable error occurs, the HAL must notify
* the framework via ISessionCallback#onError with the applicable error, and then send
* ISessionCallback#onStateChanged(cookie, SessionState::IDLING) if no subsequent operation is
* in the queue.
* the framework via ISessionCallback#onError with the applicable error.
*
* The implementation must only check for a fingerprint-like image was detected (e.g. to
* minimize interactions due to non-fingerprint objects), and the lockout counter must not
@@ -221,10 +205,8 @@ interface ISession {
* Note that if the operation is canceled, the implementation must notify the framework via
* ISessionCallback#onError with Error::CANCELED.
*
* @param cookie An identifier used to track subsystem operations related to this call path.
* The framework will guarantee that it is unique per ISession.
*/
ICancellationSignal detectInteraction(in int cookie);
ICancellationSignal detectInteraction();
/*
* enumerateEnrollments:
@@ -232,32 +214,22 @@ interface ISession {
* A request to enumerate (list) the enrollments for this (sensorId, userId) pair. The
* framework typically uses this to ensure that its cache is in sync with the HAL.
*
* Once the HAL is able to start processing this request, it must notify the framework via
* ISessionCallback#onStateChanged with SessionState::ENUMERATING_ENROLLMENTS.
*
* The implementation must then notify the framework with a list of enrollments applicable
* for the current session via ISessionCallback#onEnrollmentsEnumerated.
*
* @param cookie An identifier used to track subsystem operations related to this call path.
* The framework will guarantee that it is unique per ISession.
*/
void enumerateEnrollments(in int cookie);
void enumerateEnrollments();
/**
* removeEnrollments:
*
* A request to remove the enrollments for this (sensorId, userId) pair.
*
* Once the HAL is able to start processing this request, it must notify the framework via
* ISessionCallback#onStateChanged with SessionState::REMOVING_ENROLLMENTS.
*
* After removing the enrollmentIds from everywhere necessary (filesystem, secure subsystems,
* etc), the implementation must notify the framework via ISessionCallback#onEnrollmentsRemoved.
*
* @param cookie An identifier used to track subsystem operations related to this call path.
* The framework will guarantee that it is unique per ISession.
*/
void removeEnrollments(in int cookie, in int[] enrollmentIds);
void removeEnrollments(in int[] enrollmentIds);
/**
* getAuthenticatorId:
@@ -285,10 +257,8 @@ interface ISession {
* 3) MUST not change if a fingerprint is deleted.
* 4) MUST be an entropy-encoded random number
*
* @param cookie An identifier used to track subsystem operations related to this call path. The
* client must guarantee that it is unique per ISession.
*/
void getAuthenticatorId(in int cookie);
void getAuthenticatorId();
/**
* invalidateAuthenticatorId:
@@ -312,10 +282,8 @@ interface ISession {
* for more details). As such, the framework would coordinate invalidation across multiple
* biometric HALs as necessary.
*
* @param cookie An identifier used to track subsystem operations related to this call path. The
* client must guarantee that it is unique per ISession.
*/
void invalidateAuthenticatorId(in int cookie);
void invalidateAuthenticatorId();
/**
* resetLockout:
@@ -326,8 +294,7 @@ interface ISession {
* 2) Verify that the timestamp provided within the HAT is relatively recent (e.g. on the
* order of minutes, not hours).
* If either of the checks fail, the HAL must invoke ISessionCallback#onError with
* Error::UNABLE_TO_PROCESS and return to SessionState::IDLING if no subsequent work is in the
* queue.
* Error::UNABLE_TO_PROCESS and return to the idling state.
*
* Upon successful verification, the HAL must clear the lockout counter and notify the framework
* via ISessionCallback#onLockoutCleared.
@@ -358,29 +325,26 @@ interface ISession {
* See the Android CDD section 7.3.10 for the full set of lockout and rate-limiting
* requirements.
*
* @param cookie An identifier used to track subsystem operations related to this call path. The
* client must guarantee that it is unique per ISession.
* @param hat HardwareAuthToken See above documentation.
*/
void resetLockout(in int cookie, in HardwareAuthToken hat);
void resetLockout(in HardwareAuthToken hat);
/*
* Close this session and allow the HAL to release the resources associated with this session.
*
* A session can only be closed when it's in SessionState::IDLING. Closing a session will
* result in a ISessionCallback#onStateChanged call with SessionState::CLOSED.
* A session can only be closed when the HAL is idling, i.e. not performing any of the
* non-interruptable operations. If the HAL is busy performing a cancellable operation, the
* operation must be explicitly cancelled with a call to ICancellationSignal#cancel before
* the session can be closed.
*
* If a session is unresponsive or stuck in a state other than SessionState::CLOSED,
* IFingerprint#reset could be used as a last resort to terminate the session and recover the
* HAL from a bad state.
* After a session is closed, the HAL must notify the framework by calling
* ISessionCallback#onSessionClosed.
*
* All sessions must be explicitly closed. Calling IFingerprint#createSession while there is an
* active session is considered an error.
*
* @param cookie An identifier used to track subsystem operations related to this call path. The
* client must guarantee that it is unique per ISession.
*/
void close(in int cookie);
void close();
/**
* Methods for notifying the under-display fingerprint sensor about external events.
@@ -394,9 +358,8 @@ interface ISession {
* of other types, the HAL must treat this as a no-op and return immediately.
*
* For sensors of type FingerprintSensorType::UNDER_DISPLAY_*, this method is used to notify the
* HAL of display touches. This method can be invoked when the session is in one of the
* following states: SessionState::ENROLLING, SessionState::AUTHENTICATING, or
* SessionState::DETECTING_INTERACTION.
* HAL of display touches. This method can be invoked when the HAL is performing any one of:
* ISession#authenticate, ISession#enroll, ISession#detectInteraction.
*
* Note that the framework will only invoke this method if the event occurred on the display on
* which this sensor is located.

View File

@@ -18,16 +18,10 @@ package android.hardware.biometrics.fingerprint;
import android.hardware.biometrics.fingerprint.AcquiredInfo;
import android.hardware.biometrics.fingerprint.Error;
import android.hardware.biometrics.fingerprint.SessionState;
import android.hardware.keymaster.HardwareAuthToken;
@VintfStability
interface ISessionCallback {
/**
* Used to notify the framework of session state changes. See ISession for more information.
*/
void onStateChanged(in int cookie, in SessionState state);
/**
* Notifies the framework when a challenge is successfully generated.
*/
@@ -39,10 +33,10 @@ interface ISessionCallback {
void onChallengeRevoked(in long challenge);
/**
* This method must only be used to notify the framework during the following states:
* 1) SessionState::ENROLLING
* 2) SessionState::AUTHENTICATING
* 3) SessionState::DETECTING_INTERACTION
* This method must only be used to notify the framework during the following operations:
* 1) ISession#enroll
* 2) ISession#authenticate
* 3) ISession#detectInteraction
*
* These messages may be used to provide user guidance multiple times if necessary per
* operation.
@@ -56,18 +50,18 @@ interface ISessionCallback {
void onAcquired(in AcquiredInfo info, in int vendorCode);
/**
* This method must only be used to notify the framework during the following states:
* 1) SessionState::ENROLLING
* 2) SessionState::AUTHENTICATING
* 3) SessionState::DETECTING_INTERACTION
* 4) SessionState::INVALIDATING_AUTHENTICATOR_ID
* 5) SessionState::RESETTING_LOCKOUT
* This method must only be used to notify the framework during the following operations:
* 1) ISession#enroll
* 2) ISession#authenticate
* 3) ISession#detectInteraction
* 4) ISession#invalidateAuthenticatorId
* 5) ISession#resetLockout
*
* These messages may be used to notify the framework or user that a non-recoverable error
* has occurred. The operation is finished, and the HAL must proceed with the next operation
* or return to SessionState::IDLING if the queue is empty.
* has occurred. The operation is finished, and the HAL can proceed with the next operation
* or return to the idling state.
*
* Note that cancellation (see common::ICancellationSignal) and preemption most be followed with
* Note that cancellation (see common::ICancellationSignal) and preemption must be followed with
* an Error::CANCELED message.
*
* @param error See the Error enum.
@@ -79,8 +73,7 @@ interface ISessionCallback {
void onError(in Error error, in int vendorCode);
/**
* This method must only be used to notify the framework during the following state:
* 1) SessionState::ENROLLING
* This method must only be used to notify the framework during the ISession#enroll operation.
*
* @param enrollmentId Unique stable identifier for the enrollment that's being added by this
* ISession#enroll invocation.
@@ -89,7 +82,7 @@ interface ISessionCallback {
void onEnrollmentProgress(in int enrollmentId, int remaining);
/**
* This method must only be used to notify the framework during SessionState::AUTHENTICATING.
* This method must only be used to notify the framework during ISession#authenticate.
*
* Used to notify the framework upon successful authentication. Note that the authentication
* lifecycle ends when either 1) a fingerprint is accepted, or 2) an error occurred. The
@@ -104,7 +97,7 @@ interface ISessionCallback {
void onAuthenticationSucceeded(in int enrollmentId, in HardwareAuthToken hat);
/**
* This method must only be used to notify the framework during SessionState::AUTHENTICATING.
* This method must only be used to notify the framework during ISession#authenticate.
*
* Used to notify the framework upon rejected attempts. Note that the authentication
* lifecycle ends when either 1) a fingerprint is accepted, or 2) an occurred. The
@@ -113,7 +106,7 @@ interface ISessionCallback {
void onAuthenticationFailed();
/**
* This method must only be used to notify the framework during SessionState::AUTHENTICATING.
* This method must only be used to notify the framework during ISession#authenticate.
*
* Authentication is locked out due to too many unsuccessful attempts. This is a rate-limiting
* lockout, and authentication can be restarted after a period of time. See
@@ -126,7 +119,7 @@ interface ISessionCallback {
void onLockoutTimed(in long durationMillis);
/**
* This method must only be used to notify the framework during SessionState::AUTHENTICATING.
* This method must only be used to notify the framework during ISession#authenticate.
*
* Authentication is disabled until the user unlocks with their device credential
* (PIN/Pattern/Password). See ISession#resetLockout.
@@ -153,7 +146,7 @@ interface ISessionCallback {
/**
* This method must only be used to notify the framework during
* SessionState::DETECTING_INTERACTION
* ISession#detectInteraction
*
* Notifies the framework that user interaction occurred. See ISession#detectInteraction.
*/
@@ -161,7 +154,7 @@ interface ISessionCallback {
/**
* This method must only be used to notify the framework during
* SessionState::ENUMERATING_ENROLLMENTS.
* ISession#enumerateEnrollments.
*
* Notifies the framework of the current enrollments. See ISession#enumerateEnrollments.
*
@@ -171,7 +164,7 @@ interface ISessionCallback {
/**
* This method must only be used to notify the framework during
* SessionState::REMOVING_ENROLLMENTS.
* ISession#removeEnrollments.
*
* Notifies the framework that the specified enrollments are removed.
*
@@ -181,7 +174,7 @@ interface ISessionCallback {
/**
* This method must only be used to notify the framework during
* SessionState::GETTING_AUTHENTICATOR_ID.
* ISession#getAuthenticatorId.
*
* Notifies the framework with the authenticatorId corresponding to this session's
* (userId, sensorId) pair.
@@ -192,7 +185,7 @@ interface ISessionCallback {
/**
* This method must only be used to notify the framework during
* SessionState::INVALIDATING_AUTHENTICATOR_ID.
* ISession#invalidateAuthenticatorId.
*
* See ISession#invalidateAuthenticatorId for more information.
*

View File

@@ -1,81 +0,0 @@
/*
* 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 android.hardware.biometrics.fingerprint;
@VintfStability
@Backing(type="byte")
enum SessionState {
/**
* The HAL is not processing any session requests.
*/
IDLING,
/**
* The session has been closed by the client.
*/
CLOSED,
/**
* The HAL is processing the ISession#generateChallenge request.
*/
GENERATING_CHALLENGE,
/**
* The HAL is processing the ISession#revokeChallenge request.
*/
REVOKING_CHALLENGE,
/**
* The HAL is processing the ISession#enroll request.
*/
ENROLLING,
/**
* The HAL is processing the ISession#authenticate request.
*/
AUTHENTICATING,
/**
* The HAL is processing the ISession#detectInteraction request.
*/
DETECTING_INTERACTION,
/**
* The HAL is processing the ISession#enumerateEnrollments request.
*/
ENUMERATING_ENROLLMENTS,
/**
* The HAL is processing the ISession#removeEnrollments request.
*/
REMOVING_ENROLLMENTS,
/**
* The HAL is processing the ISession#getAuthenticatorId request.
*/
GETTING_AUTHENTICATOR_ID,
/**
* The HAL is processing the ISession#invalidateAuthenticatorId request.
*/
INVALIDATING_AUTHENTICATOR_ID,
/**
* The HAL is processing the ISession#resetLockout request.
*/
RESETTING_LOCKOUT
}