biometrics/fingerprint/aidl/default/include/FakeFingerprintEngine.h

/*
 * Copyright (C) 2021 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.
 */

#pragma once
#include <aidl/android/hardware/biometrics/common/SensorStrength.h>
#include <aidl/android/hardware/biometrics/fingerprint/ISessionCallback.h>

#include <random>

#include <future>
#include <vector>

using namespace ::aidl::android::hardware::biometrics::common;

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

// A fake engine that is backed by system properties instead of hardware.
class FakeFingerprintEngine {
  public:
    FakeFingerprintEngine() : mRandom(std::mt19937::default_seed) {}

    void generateChallengeImpl(ISessionCallback* cb);
    void revokeChallengeImpl(ISessionCallback* cb, int64_t challenge);
    void enrollImpl(ISessionCallback* cb, const keymaster::HardwareAuthToken& hat,
                    const std::future<void>& cancel);
    void authenticateImpl(ISessionCallback* cb, int64_t operationId,
                          const std::future<void>& cancel);
    void detectInteractionImpl(ISessionCallback* cb, const std::future<void>& cancel);
    void enumerateEnrollmentsImpl(ISessionCallback* cb);
    void removeEnrollmentsImpl(ISessionCallback* cb, const std::vector<int32_t>& enrollmentIds);
    void getAuthenticatorIdImpl(ISessionCallback* cb);
    void invalidateAuthenticatorIdImpl(ISessionCallback* cb);
    void resetLockoutImpl(ISessionCallback* cb, const keymaster::HardwareAuthToken& /*hat*/);

    std::mt19937 mRandom;
};

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