aidl/fingerprint/Session.h

/*
 * Copyright (C) 2024 The LineageOS Project
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#pragma once

#include <aidl/android/hardware/biometrics/fingerprint/BnSession.h>
#include <aidl/android/hardware/biometrics/fingerprint/ISessionCallback.h>

#include <hardware/fingerprint.h>

#include "LegacyHAL.h"
#include "LockoutTracker.h"

#define FINGERPRINT_DATA_DIR "/data/vendor/biometrics/fp/User_%d/"

using ::aidl::android::hardware::biometrics::common::ICancellationSignal;
using ::aidl::android::hardware::biometrics::common::OperationContext;
using ::aidl::android::hardware::biometrics::fingerprint::PointerContext;
using ::aidl::android::hardware::keymaster::HardwareAuthToken;

namespace aidl {
namespace android {
namespace hardware {
namespace biometrics {
namespace fingerprint {

void onClientDeath(void* cookie);

class Session : public BnSession {
public:
    Session(LegacyHAL hal, int userId, std::shared_ptr<ISessionCallback> cb,
            LockoutTracker lockoutTracker);
    ndk::ScopedAStatus generateChallenge() override;
    ndk::ScopedAStatus revokeChallenge(int64_t challenge) override;
    ndk::ScopedAStatus enroll(const HardwareAuthToken& hat,
                              std::shared_ptr<ICancellationSignal>* out) override;
    ndk::ScopedAStatus authenticate(int64_t operationId,
                                    std::shared_ptr<ICancellationSignal>* out) override;
    ndk::ScopedAStatus detectInteraction(
            std::shared_ptr<ICancellationSignal>* out) override;
    ndk::ScopedAStatus enumerateEnrollments() override;
    ndk::ScopedAStatus removeEnrollments(const std::vector<int32_t>& enrollmentIds) override;
    ndk::ScopedAStatus getAuthenticatorId() override;
    ndk::ScopedAStatus invalidateAuthenticatorId() override;
    ndk::ScopedAStatus resetLockout(const HardwareAuthToken& hat) override;
    ndk::ScopedAStatus close() override;
    ndk::ScopedAStatus onPointerDown(int32_t pointerId, int32_t x, int32_t y, float minor,
                                     float major) override;
    ndk::ScopedAStatus onPointerUp(int32_t pointerId) override;
    ndk::ScopedAStatus onUiReady() override;
    ndk::ScopedAStatus authenticateWithContext(
            int64_t operationId, const OperationContext& context,
            std::shared_ptr<ICancellationSignal>* out) override;
    ndk::ScopedAStatus enrollWithContext(
            const HardwareAuthToken& hat, const OperationContext& context,
            std::shared_ptr<ICancellationSignal>* out) override;
    ndk::ScopedAStatus detectInteractionWithContext(
            const OperationContext& context,
            std::shared_ptr<ICancellationSignal>* out) override;
    ndk::ScopedAStatus onPointerDownWithContext(const PointerContext& context) override;
    ndk::ScopedAStatus onPointerUpWithContext(const PointerContext& context) override;
    ndk::ScopedAStatus onContextChanged(const OperationContext& context) override;
    ndk::ScopedAStatus onPointerCancelWithContext(const PointerContext& context) override;
    ndk::ScopedAStatus setIgnoreDisplayTouches(bool shouldIgnore) override;

    ndk::ScopedAStatus cancel();
    binder_status_t linkToDeath(AIBinder* binder);
    bool isClosed();
    void notify(
        const fingerprint_msg_t* msg);
    void onCaptureReady();

private:
    LegacyHAL mHal;
    LockoutTracker mLockoutTracker;
    bool mClosed = false;
    bool mCaptureReady = false;

    Error VendorErrorFilter(int32_t error, int32_t* vendorCode);
    AcquiredInfo VendorAcquiredFilter(int32_t info, int32_t* vendorCode);
    bool checkSensorLockout();
    void clearLockout(bool clearAttemptCounter);
    void startLockoutTimer(int64_t timeout);
    void lockoutTimerExpired();

    // lockout timer
    bool mIsLockoutTimerStarted = false;
    bool mIsLockoutTimerAborted = false;

    // The user ID for which this session was created.
    int32_t mUserId;

    // Callback for talking to the framework. This callback must only be called from non-binder
    // threads to prevent nested binder calls and consequently a binder thread exhaustion.
    // Practically, it means that this callback should always be called from the worker thread.
    std::shared_ptr<ISessionCallback> mCb;

    // Binder death handler.
    AIBinder_DeathRecipient* mDeathRecipient;
};

} // namespace fingerprint
} // namespace biometrics
} // namespace hardware
} // namespace android
} // namespace aidl