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// Copyright 2019 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/ash/u2f/u2f_notification.h"
#include <memory>
#include <string>
#include "ash/constants/notifier_catalogs.h"
#include "ash/public/cpp/notification_utils.h"
#include "base/containers/contains.h"
#include "base/files/file_enumerator.h"
#include "base/files/file_path.h"
#include "base/functional/bind.h"
#include "chrome/browser/notifications/notification_display_service.h"
#include "chrome/browser/notifications/notification_display_service_factory.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "chrome/browser/ui/browser_navigator.h"
#include "chrome/browser/ui/browser_navigator_params.h"
#include "chrome/grit/generated_resources.h"
#include "chromeos/ash/components/dbus/debug_daemon/debug_daemon_client.h"
#include "chromeos/ash/components/settings/cros_settings.h"
#include "components/policy/proto/chrome_device_policy.pb.h"
#include "components/strings/grit/components_strings.h"
#include "third_party/cros_system_api/dbus/debugd/dbus-constants.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/gfx/vector_icon_types.h"
#include "ui/message_center/public/cpp/notification.h"
namespace ash {
namespace {
constexpr char kU2FNotificationId[] = "chrome://u2f_notification";
constexpr char kU2FAdvisoryURL[] =
"https://sites.google.com/a/chromium.org/dev/chromium-os/"
"u2f-ecdsa-vulnerability";
// Notification button identifiers.
enum class ButtonIndex : int {
kLearnMore = 0,
kReset = 1,
};
} // namespace
U2FNotification::U2FNotification() = default;
U2FNotification::~U2FNotification() = default;
void U2FNotification::Check() {
DebugDaemonClient::Get()->GetU2fFlags(base::BindOnce(
&U2FNotification::CheckStatus, weak_factory_.GetWeakPtr()));
}
void U2FNotification::CheckStatus(std::optional<std::set<std::string>> flags) {
if (!flags) {
LOG(ERROR) << "Failed to get U2F flags.";
return;
}
// The legacy implementation is only enabled if either the U2F or G2F flags
// are present and the user_keys flag is off (the latter enables the improved
// implementation).
if (!(base::Contains(*flags, debugd::u2f_flags::kU2f) ||
base::Contains(*flags, debugd::u2f_flags::kG2f)) ||
base::Contains(*flags, debugd::u2f_flags::kUserKeys)) {
return;
}
CrosSettings* settings = CrosSettings::Get();
switch (settings->PrepareTrustedValues(base::BindOnce(
&U2FNotification::CheckStatus, weak_factory_.GetWeakPtr(), flags))) {
case CrosSettingsProvider::TEMPORARILY_UNTRUSTED:
// Retry happens via the callback registered above.
return;
case CrosSettingsProvider::PERMANENTLY_UNTRUSTED:
// No device settings, so they won't take effect.
break;
case CrosSettingsProvider::TRUSTED:
// If the 2FA setting is present and not set to "unset", it disables the
// legacy implementation, so bail if that is the case. This corresponds
// with behavior in u2fd and should be kept in sync.
constexpr auto kU2fModeUnset =
enterprise_management::DeviceSecondFactorAuthenticationProto::UNSET;
int mode;
if (settings->GetInteger(kDeviceSecondFactorAuthenticationMode, &mode) &&
mode != kU2fModeUnset) {
return;
}
break;
}
// Legacy implementation is on, notify.
ShowNotification();
}
void U2FNotification::ShowNotification() {
Profile* profile = ProfileManager::GetPrimaryUserProfile();
message_center::RichNotificationData data;
data.buttons.emplace_back(l10n_util::GetStringUTF16(IDS_LEARN_MORE));
data.buttons.emplace_back(
l10n_util::GetStringUTF16(IDS_U2F_INSECURE_NOTIFICATION_RESET));
message_center::Notification notification = CreateSystemNotification(
message_center::NOTIFICATION_TYPE_SIMPLE, kU2FNotificationId,
l10n_util::GetStringUTF16(IDS_U2F_INSECURE_NOTIFICATION_TITLE),
l10n_util::GetStringUTF16(IDS_U2F_INSECURE_NOTIFICATION_MESSAGE),
std::u16string(), GURL(kU2FNotificationId),
message_center::NotifierId(message_center::NotifierType::SYSTEM_COMPONENT,
kU2FNotificationId,
NotificationCatalogName::kU2F),
data,
base::MakeRefCounted<message_center::HandleNotificationClickDelegate>(
base::BindRepeating(&U2FNotification::OnNotificationClick,
weak_factory_.GetWeakPtr())),
gfx::VectorIcon::EmptyIcon(),
message_center::SystemNotificationWarningLevel::WARNING);
notification.SetSystemPriority();
notification.set_pinned(false);
NotificationDisplayServiceFactory::GetForProfile(profile)->Display(
NotificationHandler::Type::TRANSIENT, notification,
nullptr /* metadata */);
}
void U2FNotification::OnNotificationClick(
const std::optional<int> button_index) {
Profile* profile = ProfileManager::GetPrimaryUserProfile();
if (!button_index || !profile) {
return;
}
switch (static_cast<ButtonIndex>(*button_index)) {
case ButtonIndex::kLearnMore: {
// Load the chromium.org advisory page in a new tab.
NavigateParams params(profile, GURL(kU2FAdvisoryURL),
ui::PAGE_TRANSITION_LINK);
params.disposition = WindowOpenDisposition::NEW_FOREGROUND_TAB;
params.window_action = NavigateParams::SHOW_WINDOW;
Navigate(¶ms);
break;
}
case ButtonIndex::kReset: {
// Add the user_keys flag.
DebugDaemonClient::Get()->GetU2fFlags(
base::BindOnce([](std::optional<std::set<std::string>> flags) {
if (!flags) {
LOG(ERROR) << "Failed to get U2F flags.";
return;
}
flags->insert(debugd::u2f_flags::kUserKeys);
DebugDaemonClient::Get()->SetU2fFlags(
*flags, base::BindOnce([](bool result) {
if (!result) {
LOG(ERROR) << "Failed to set U2F flags.";
return;
}
}));
}));
// TODO: Should we close in all cases?
NotificationDisplayServiceFactory::GetForProfile(profile)->Close(
NotificationHandler::Type::TRANSIENT, kU2FNotificationId);
break;
}
}
}
} // namespace ash
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