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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/device_reauth/mac/device_authenticator_mac.h"
#include "base/functional/bind.h"
#include "base/memory/ptr_util.h"
#include "base/metrics/histogram_functions.h"
#include "base/notreached.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/device_reauth/mac/authenticator_mac.h"
#include "chrome/browser/password_manager/password_manager_util_mac.h"
#include "chrome/grit/branded_strings.h"
#include "components/device_reauth/device_authenticator.h"
#include "components/password_manager/core/browser/features/password_features.h"
#include "components/password_manager/core/common/password_manager_pref_names.h"
#include "components/prefs/pref_service.h"
#include "device/fido/mac/touch_id_context.h"
#include "ui/base/l10n/l10n_util.h"
DeviceAuthenticatorMac::DeviceAuthenticatorMac(
std::unique_ptr<AuthenticatorMacInterface> authenticator,
DeviceAuthenticatorProxy* proxy,
const device_reauth::DeviceAuthParams& params)
: DeviceAuthenticatorCommon(proxy,
params.GetAuthenticationValidityPeriod(),
params.GetAuthResultHistogram()),
authenticator_(std::move(authenticator)) {}
DeviceAuthenticatorMac::~DeviceAuthenticatorMac() = default;
bool DeviceAuthenticatorMac::CanAuthenticateWithBiometrics() {
bool is_available = authenticator_->CheckIfBiometricsAvailable();
base::UmaHistogramBoolean("PasswordManager.CanUseBiometricsMac",
is_available);
if (is_available) {
// If biometrics is available, we should record that at one point in time
// biometrics was available on this device. This will never be set to false
// after setting to true here as we only record this when biometrics is
// available.
g_browser_process->local_state()->SetBoolean(
password_manager::prefs::kHadBiometricsAvailable, /*value=*/true);
}
return is_available;
}
bool DeviceAuthenticatorMac::CanAuthenticateWithBiometricOrScreenLock() {
// We check if we can authenticate strictly with biometrics first as this
// function has important side effects such as logging metrics related to how
// often users have biometrics available, and setting a pref that denotes that
// at one point biometrics was available on this device.
if (CanAuthenticateWithBiometrics()) {
return true;
}
// TODO(crbug.com/4555994): Add metrics logging for the only screen lock
// available case.
return authenticator_->CheckIfBiometricsOrScreenLockAvailable();
}
void DeviceAuthenticatorMac::Cancel() {
touch_id_auth_context_ = nullptr;
if (callback_) {
// No code should be run after the callback as the callback could already be
// destroying "this".
std::move(callback_).Run(/*success=*/false);
}
}
void DeviceAuthenticatorMac::AuthenticateWithMessage(
const std::u16string& message,
AuthenticateCallback callback) {
// Callers must ensure that previous authentication is canceled.
DCHECK(!callback_);
if (!NeedsToAuthenticate()) {
RecordAuthResultSkipped();
// No code should be run after the callback as the callback could already be
// destroying "this".
std::move(callback).Run(/*success=*/true);
return;
}
callback_ = std::move(callback);
// Always use CanAuthenticateWithBiometrics() before invoking the biometrics
// API, and if it fails use password_manager_util_mac::AuthenticateUser()
// instead, until crbug.com/1358442 is fixed.
if (!CanAuthenticateWithBiometrics()) {
OnAuthenticationCompleted(authenticator_->AuthenticateUserWithNonBiometrics(
l10n_util::GetStringFUTF16(IDS_PASSWORDS_AUTHENTICATION_PROMPT_PREFIX,
message)));
return;
}
touch_id_auth_context_ = device::fido::mac::TouchIdContext::Create();
touch_id_auth_context_->PromptTouchId(
message,
base::BindOnce(&DeviceAuthenticatorMac::OnAuthenticationCompleted,
weak_ptr_factory_.GetWeakPtr()));
}
void DeviceAuthenticatorMac::OnAuthenticationCompleted(bool success) {
touch_id_auth_context_ = nullptr;
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (!callback_) {
return;
}
RecordAuthenticationTimeIfSuccessful(success);
// No code should be run after the callback as the callback could already be
// destroying "this".
std::move(callback_).Run(success);
}
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