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// Copyright 2016 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/policy/handlers/bluetooth_policy_handler.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/memory/ref_counted.h"
#include "base/syslog_logging.h"
#include "base/values.h"
#include "chromeos/ash/components/login/login_state/login_state.h"
#include "chromeos/ash/components/settings/cros_settings_names.h"
#include "chromeos/ash/components/settings/cros_settings_provider.h"
#include "device/bluetooth/bluetooth_adapter_factory.h"
#include "device/bluetooth/public/cpp/bluetooth_uuid.h"
namespace policy {
namespace {
void SetJustWorksBluetoothPairingPolicy(
ash::CrosSettings* cros_settings,
scoped_refptr<device::BluetoothAdapter> adapter,
base::OnceClosure callback,
base::OnceClosure error_callback) {
bool allow_just_works_bluetooth_pairing = false;
bool has_policy_value =
cros_settings->GetBoolean(ash::kDeviceBluetoothJustWorksPairingEnabled,
&allow_just_works_bluetooth_pairing);
if (has_policy_value && ash::LoginState::IsInitialized() &&
ash::LoginState::Get()->IsUserLoggedIn()) {
adapter->SetSimpleSecurePairingEnabled(allow_just_works_bluetooth_pairing,
std::move(callback),
std::move(error_callback));
return;
}
// When not in session always disable just works pairing.
adapter->SetSimpleSecurePairingEnabled(/*enabled=*/false, std::move(callback),
std::move(error_callback));
}
} // namespace
BluetoothPolicyHandler::BluetoothPolicyHandler(ash::CrosSettings* cros_settings)
: cros_settings_(cros_settings) {
allow_bluetooth_subscription_ = cros_settings_->AddSettingsObserver(
ash::kAllowBluetooth,
base::BindRepeating(&BluetoothPolicyHandler::OnBluetoothPolicyChanged,
weak_factory_.GetWeakPtr()));
allowed_services_subscription_ = cros_settings_->AddSettingsObserver(
ash::kDeviceAllowedBluetoothServices,
base::BindRepeating(&BluetoothPolicyHandler::OnBluetoothPolicyChanged,
weak_factory_.GetWeakPtr()));
allow_just_works_pairing_subscription_ = cros_settings_->AddSettingsObserver(
ash::kDeviceBluetoothJustWorksPairingEnabled,
base::BindRepeating(&BluetoothPolicyHandler::OnBluetoothPolicyChanged,
weak_factory_.GetWeakPtr()));
device::BluetoothAdapterFactory::Get()->GetAdapter(
base::BindOnce(&BluetoothPolicyHandler::InitializeOnAdapterReady,
weak_factory_.GetWeakPtr()));
ash::LoginState::Get()->AddObserver(this);
// Fire it once so we're sure we get an invocation on startup.
OnBluetoothPolicyChanged();
}
BluetoothPolicyHandler::~BluetoothPolicyHandler() {
if (adapter_) {
adapter_->RemoveObserver(this);
}
// During Shutdown, Check if |LoginState| is still initialized before removing
// the observer to prevent a CHECK failure.
if (ash::LoginState::IsInitialized()) {
ash::LoginState::Get()->RemoveObserver(this);
}
}
void BluetoothPolicyHandler::AdapterPresentChanged(
device::BluetoothAdapter* adapter,
bool present) {
SetBluetoothPolicy();
}
void BluetoothPolicyHandler::AdapterPoweredChanged(
device::BluetoothAdapter* adapter,
bool powered) {
SetBluetoothPolicy();
}
void BluetoothPolicyHandler::LoggedInStateChanged() {
// Force a policy update so that the in-session policies can be applied
// properly.
OnBluetoothPolicyChanged();
}
void BluetoothPolicyHandler::InitializeOnAdapterReady(
scoped_refptr<device::BluetoothAdapter> adapter) {
adapter_ = std::move(adapter);
adapter_->AddObserver(this);
SetBluetoothPolicy();
}
void BluetoothPolicyHandler::OnBluetoothPolicyChanged() {
ash::CrosSettingsProvider::TrustedStatus status =
cros_settings_->PrepareTrustedValues(
base::BindOnce(&BluetoothPolicyHandler::OnBluetoothPolicyChanged,
weak_factory_.GetWeakPtr()));
if (status != ash::CrosSettingsProvider::TRUSTED) {
return;
}
new_policy_update_pending_ = true;
SetBluetoothPolicy();
}
void SetServiceAllowListSuccess() {
SYSLOG(INFO) << "Set ServiceAllowList Success";
}
void SetServiceAllowListFailed() {
SYSLOG(ERROR) << "Set ServiceAllowList Failed";
}
void SetJustWorksPairingEnabledSuccess() {
SYSLOG(INFO) << "Set JustWorksPairingEnabled Success";
}
void SetJustWorksPairingEnabledFailed() {
SYSLOG(ERROR) << "Set JustWorksPairingEnabled Failed";
}
void BluetoothPolicyHandler::SetBluetoothPolicy() {
// Get the updated policy.
bool allow_bluetooth = true;
const base::Value::List* allowed_services_list = nullptr;
std::vector<device::BluetoothUUID> allowed_services;
if (!adapter_ || !adapter_->IsInitialized() || !adapter_->IsPresent() ||
!adapter_->IsPowered() || !new_policy_update_pending_) {
return;
}
cros_settings_->GetBoolean(ash::kAllowBluetooth, &allow_bluetooth);
if (!allow_bluetooth) {
adapter_->SetPowered(false, base::DoNothing(), base::DoNothing());
adapter_->Shutdown();
}
// Pass empty list to SetServiceAllowList means no restriction for users,
// which is the same behavior as leaving DeviceAllowedBluetoothService unset.
// Therefore, we don't need to handle the case when device management server
// returns an empty list even if the policy did not set.
if (cros_settings_->GetList(ash::kDeviceAllowedBluetoothServices,
&allowed_services_list)) {
for (const auto& list_value : *allowed_services_list) {
if (!list_value.is_string()) {
continue;
}
const std::string& uuid_str = list_value.GetString();
device::BluetoothUUID uuid(uuid_str);
if (!uuid.IsValid()) {
SYSLOG(WARNING) << "Failed to parse '" << uuid_str
<< "' into UUID struct";
continue;
}
allowed_services.push_back(uuid);
}
std::ostringstream info_stream;
info_stream << "Setting " << allowed_services.size()
<< " UUIDs as allowed services;";
for (size_t i = 0; i < allowed_services.size(); i++) {
info_stream << " " << i << "th allowed service uuid: "
<< allowed_services[i].canonical_value() << ";";
}
SYSLOG(INFO) << info_stream.str();
adapter_->SetServiceAllowList(allowed_services,
base::BindOnce(SetServiceAllowListSuccess),
base::BindOnce(SetServiceAllowListFailed));
}
SetJustWorksBluetoothPairingPolicy(
cros_settings_, adapter_,
base::BindOnce(SetJustWorksPairingEnabledSuccess),
base::BindOnce(SetJustWorksPairingEnabledFailed));
// Reset the indicator to false to make sure we don't bother setting the same
// policy to the daemon, although it is harmless.
new_policy_update_pending_ = false;
}
} // namespace policy
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