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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_DEVICE_REAUTH_DEVICE_AUTHENTICATOR_COMMON_H_
#define COMPONENTS_DEVICE_REAUTH_DEVICE_AUTHENTICATOR_COMMON_H_
#include <optional>
#include "base/gtest_prod_util.h"
#include "base/memory/weak_ptr.h"
#include "components/device_reauth/device_authenticator.h"
#include "components/keyed_service/core/keyed_service.h"
// Helper class which keeps the last good authentication timestamp such that it
// is common per profile.
class DeviceAuthenticatorProxy : public KeyedService {
public:
DeviceAuthenticatorProxy();
~DeviceAuthenticatorProxy() override;
std::optional<base::TimeTicks> GetLastGoodAuthTimestamp() {
return last_good_auth_timestamp_;
}
void UpdateLastGoodAuthTimestamp() {
last_good_auth_timestamp_ = base::TimeTicks::Now();
}
base::WeakPtr<DeviceAuthenticatorProxy> GetWeakPtr() {
return weak_ptr_factory_.GetWeakPtr();
}
private:
// Time of last successful re-auth. nullopt if there hasn't been an auth yet.
std::optional<base::TimeTicks> last_good_auth_timestamp_;
// Factory for weak pointers to this class.
base::WeakPtrFactory<DeviceAuthenticatorProxy> weak_ptr_factory_{this};
};
// Used to care of the auth validity period for biometric authenticators.
class DeviceAuthenticatorCommon : public device_reauth::DeviceAuthenticator {
public:
DeviceAuthenticatorCommon(DeviceAuthenticatorProxy* proxy,
base::TimeDelta auth_validity_period,
const std::string& auth_result_histogram);
protected:
~DeviceAuthenticatorCommon() override;
// Checks whether user needs to reauthenticate.
bool NeedsToAuthenticate() const;
// Records the authentication time if the authentication was successful.
void RecordAuthenticationTimeIfSuccessful(bool success);
// Records ReauthResult::kSkipped for the `auth_result_histogram_` metric.
void RecordAuthResultSkipped();
private:
FRIEND_TEST_ALL_PREFIXES(ChromeDeviceAuthenticatorFactoryTest,
NeedAuthentication);
// Used to obtain/update the last successful authentication timestamp.
base::WeakPtr<DeviceAuthenticatorProxy> device_authenticator_proxy_;
// Used to calculate how much time needs to pass before the user needs to
// authenticate again.
base::TimeDelta auth_validity_period_;
// Used to record histograms compatible with the device_reauth::ReauthResult
// enum.
std::string auth_result_histogram_;
};
#endif // COMPONENTS_DEVICE_REAUTH_DEVICE_AUTHENTICATOR_COMMON_H_
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