blob: 3609c7f7736f804515219768e0e7f868cda4ba0c [file] [log] [blame]
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/chromeos/ownership/owner_settings_service_chromeos.h"
#include <string>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "base/command_line.h"
#include "base/prefs/pref_service.h"
#include "base/threading/thread_checker.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/chromeos/profiles/profile_helper.h"
#include "chrome/browser/chromeos/settings/cros_settings.h"
#include "chrome/browser/chromeos/settings/device_settings_provider.h"
#include "chrome/browser/chromeos/settings/session_manager_operation.h"
#include "chrome/browser/profiles/profile.h"
#include "chromeos/dbus/dbus_thread_manager.h"
#include "chromeos/tpm_token_loader.h"
#include "components/ownership/owner_key_util.h"
#include "components/policy/core/common/cloud/cloud_policy_constants.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/notification_details.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_source.h"
#include "content/public/common/content_switches.h"
#include "crypto/nss_util.h"
#include "crypto/nss_util_internal.h"
#include "crypto/rsa_private_key.h"
#include "crypto/scoped_nss_types.h"
#include "crypto/signature_creator.h"
namespace em = enterprise_management;
using content::BrowserThread;
using ownership::OwnerKeyUtil;
using ownership::PrivateKey;
using ownership::PublicKey;
namespace chromeos {
namespace {
bool IsOwnerInTests(const std::string& user_id) {
if (user_id.empty() ||
!CommandLine::ForCurrentProcess()->HasSwitch(::switches::kTestType) ||
!CrosSettings::IsInitialized()) {
return false;
}
const base::Value* value = CrosSettings::Get()->GetPref(kDeviceOwner);
if (!value || value->GetType() != base::Value::TYPE_STRING)
return false;
return static_cast<const base::StringValue*>(value)->GetString() == user_id;
}
void LoadPrivateKeyByPublicKey(
const scoped_refptr<OwnerKeyUtil>& owner_key_util,
scoped_refptr<PublicKey> public_key,
const std::string& username_hash,
const base::Callback<void(const scoped_refptr<PublicKey>& public_key,
const scoped_refptr<PrivateKey>& private_key)>&
callback) {
crypto::EnsureNSSInit();
crypto::ScopedPK11Slot public_slot =
crypto::GetPublicSlotForChromeOSUser(username_hash);
crypto::ScopedPK11Slot private_slot = crypto::GetPrivateSlotForChromeOSUser(
username_hash, base::Callback<void(crypto::ScopedPK11Slot)>());
// If private slot is already available, this will check it. If not,
// we'll get called again later when the TPM Token is ready, and the
// slot will be available then.
scoped_refptr<PrivateKey> private_key(
new PrivateKey(owner_key_util->FindPrivateKeyInSlot(public_key->data(),
private_slot.get())));
if (!private_key->key()) {
private_key = new PrivateKey(owner_key_util->FindPrivateKeyInSlot(
public_key->data(), public_slot.get()));
}
BrowserThread::PostTask(BrowserThread::UI,
FROM_HERE,
base::Bind(callback, public_key, private_key));
}
void LoadPrivateKey(
const scoped_refptr<OwnerKeyUtil>& owner_key_util,
const std::string username_hash,
const base::Callback<void(const scoped_refptr<PublicKey>& public_key,
const scoped_refptr<PrivateKey>& private_key)>&
callback) {
std::vector<uint8> public_key_data;
scoped_refptr<PublicKey> public_key;
if (!owner_key_util->ImportPublicKey(&public_key_data)) {
scoped_refptr<PrivateKey> private_key;
BrowserThread::PostTask(BrowserThread::UI,
FROM_HERE,
base::Bind(callback, public_key, private_key));
return;
}
public_key = new PublicKey();
public_key->data().swap(public_key_data);
bool rv = BrowserThread::PostTask(BrowserThread::IO,
FROM_HERE,
base::Bind(&LoadPrivateKeyByPublicKey,
owner_key_util,
public_key,
username_hash,
callback));
if (!rv) {
// IO thread doesn't exists in unit tests, but it's safe to use NSS from
// BlockingPool in unit tests.
LoadPrivateKeyByPublicKey(
owner_key_util, public_key, username_hash, callback);
}
}
bool DoesPrivateKeyExistAsyncHelper(
const scoped_refptr<OwnerKeyUtil>& owner_key_util) {
std::vector<uint8> public_key;
if (!owner_key_util->ImportPublicKey(&public_key))
return false;
scoped_ptr<crypto::RSAPrivateKey> key(
crypto::RSAPrivateKey::FindFromPublicKeyInfo(public_key));
bool is_owner = key.get() != NULL;
return is_owner;
}
// Checks whether NSS slots with private key are mounted or
// not. Responds via |callback|.
void DoesPrivateKeyExistAsync(
const scoped_refptr<OwnerKeyUtil>& owner_key_util,
const OwnerSettingsServiceChromeOS::IsOwnerCallback& callback) {
if (!owner_key_util.get()) {
callback.Run(false);
return;
}
scoped_refptr<base::TaskRunner> task_runner =
BrowserThread::GetBlockingPool()->GetTaskRunnerWithShutdownBehavior(
base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
base::PostTaskAndReplyWithResult(
task_runner.get(),
FROM_HERE,
base::Bind(&DoesPrivateKeyExistAsyncHelper, owner_key_util),
callback);
}
} // namespace
OwnerSettingsServiceChromeOS::OwnerSettingsServiceChromeOS(
DeviceSettingsService* device_settings_service,
Profile* profile,
const scoped_refptr<OwnerKeyUtil>& owner_key_util)
: ownership::OwnerSettingsService(owner_key_util),
device_settings_service_(device_settings_service),
profile_(profile),
waiting_for_profile_creation_(true),
waiting_for_tpm_token_(true),
has_pending_changes_(false),
weak_factory_(this),
store_settings_factory_(this) {
if (TPMTokenLoader::IsInitialized()) {
TPMTokenLoader::TPMTokenStatus tpm_token_status =
TPMTokenLoader::Get()->IsTPMTokenEnabled(
base::Bind(&OwnerSettingsServiceChromeOS::OnTPMTokenReady,
weak_factory_.GetWeakPtr()));
waiting_for_tpm_token_ =
tpm_token_status == TPMTokenLoader::TPM_TOKEN_STATUS_UNDETERMINED;
}
if (DBusThreadManager::IsInitialized() &&
DBusThreadManager::Get()->GetSessionManagerClient()) {
DBusThreadManager::Get()->GetSessionManagerClient()->AddObserver(this);
}
if (device_settings_service_)
device_settings_service_->AddObserver(this);
registrar_.Add(this,
chrome::NOTIFICATION_PROFILE_CREATED,
content::Source<Profile>(profile_));
UpdateFromService();
}
OwnerSettingsServiceChromeOS::~OwnerSettingsServiceChromeOS() {
DCHECK(thread_checker_.CalledOnValidThread());
if (device_settings_service_)
device_settings_service_->RemoveObserver(this);
if (DBusThreadManager::IsInitialized() &&
DBusThreadManager::Get()->GetSessionManagerClient()) {
DBusThreadManager::Get()->GetSessionManagerClient()->RemoveObserver(this);
}
}
void OwnerSettingsServiceChromeOS::OnTPMTokenReady(
bool /* tpm_token_enabled */) {
DCHECK(thread_checker_.CalledOnValidThread());
waiting_for_tpm_token_ = false;
// TPMTokenLoader initializes the TPM and NSS database which is necessary to
// determine ownership. Force a reload once we know these are initialized.
ReloadKeypair();
}
bool OwnerSettingsServiceChromeOS::HandlesSetting(const std::string& setting) {
return DeviceSettingsProvider::IsDeviceSetting(setting);
}
bool OwnerSettingsServiceChromeOS::Set(const std::string& setting,
const base::Value& value) {
if (!IsOwner() && !IsOwnerInTests(user_id_))
return false;
UpdateDeviceSettings(setting, value, device_settings_);
em::PolicyData policy_data;
policy_data.set_username(user_id_);
CHECK(device_settings_.SerializeToString(policy_data.mutable_policy_value()));
FOR_EACH_OBSERVER(OwnerSettingsService::Observer,
observers_,
OnTentativeChangesInPolicy(policy_data));
has_pending_changes_ = true;
StoreDeviceSettings();
return true;
}
bool OwnerSettingsServiceChromeOS::CommitTentativeDeviceSettings(
scoped_ptr<enterprise_management::PolicyData> policy) {
if (!IsOwner() && !IsOwnerInTests(user_id_))
return false;
if (policy->username() != user_id_) {
LOG(ERROR) << "Username mismatch: " << policy->username() << " vs. "
<< user_id_;
return false;
}
CHECK(device_settings_.ParseFromString(policy->policy_value()));
FOR_EACH_OBSERVER(OwnerSettingsService::Observer,
observers_,
OnTentativeChangesInPolicy(*policy));
has_pending_changes_ = true;
StoreDeviceSettings();
return true;
}
void OwnerSettingsServiceChromeOS::Observe(
int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
DCHECK(thread_checker_.CalledOnValidThread());
if (type != chrome::NOTIFICATION_PROFILE_CREATED) {
NOTREACHED();
return;
}
Profile* profile = content::Source<Profile>(source).ptr();
if (profile != profile_) {
NOTREACHED();
return;
}
waiting_for_profile_creation_ = false;
ReloadKeypair();
}
void OwnerSettingsServiceChromeOS::OwnerKeySet(bool success) {
DCHECK(thread_checker_.CalledOnValidThread());
if (success)
ReloadKeypair();
}
void OwnerSettingsServiceChromeOS::OwnershipStatusChanged() {
DCHECK(thread_checker_.CalledOnValidThread());
StoreDeviceSettings();
}
void OwnerSettingsServiceChromeOS::DeviceSettingsUpdated() {
DCHECK(thread_checker_.CalledOnValidThread());
StoreDeviceSettings();
}
void OwnerSettingsServiceChromeOS::OnDeviceSettingsServiceShutdown() {
device_settings_service_ = nullptr;
}
// static
void OwnerSettingsServiceChromeOS::IsOwnerForSafeModeAsync(
const std::string& user_hash,
const scoped_refptr<OwnerKeyUtil>& owner_key_util,
const IsOwnerCallback& callback) {
CHECK(chromeos::LoginState::Get()->IsInSafeMode());
// Make sure NSS is initialized and NSS DB is loaded for the user before
// searching for the owner key.
BrowserThread::PostTaskAndReply(
BrowserThread::IO,
FROM_HERE,
base::Bind(base::IgnoreResult(&crypto::InitializeNSSForChromeOSUser),
user_hash,
ProfileHelper::GetProfilePathByUserIdHash(user_hash)),
base::Bind(&DoesPrivateKeyExistAsync, owner_key_util, callback));
}
// static
scoped_ptr<em::PolicyData> OwnerSettingsServiceChromeOS::AssemblePolicy(
const std::string& user_id,
const em::PolicyData* policy_data,
const em::ChromeDeviceSettingsProto* settings) {
scoped_ptr<em::PolicyData> policy(new em::PolicyData());
if (policy_data) {
// Preserve management settings.
if (policy_data->has_management_mode())
policy->set_management_mode(policy_data->management_mode());
if (policy_data->has_request_token())
policy->set_request_token(policy_data->request_token());
if (policy_data->has_device_id())
policy->set_device_id(policy_data->device_id());
} else {
// If there's no previous policy data, this is the first time the device
// setting is set. We set the management mode to NOT_MANAGED initially.
policy->set_management_mode(em::PolicyData::NOT_MANAGED);
}
policy->set_policy_type(policy::dm_protocol::kChromeDevicePolicyType);
policy->set_timestamp(
(base::Time::Now() - base::Time::UnixEpoch()).InMilliseconds());
policy->set_username(user_id);
if (!settings->SerializeToString(policy->mutable_policy_value()))
return scoped_ptr<em::PolicyData>();
return policy.Pass();
}
// static
void OwnerSettingsServiceChromeOS::UpdateDeviceSettings(
const std::string& path,
const base::Value& value,
enterprise_management::ChromeDeviceSettingsProto& settings) {
if (path == kAccountsPrefAllowNewUser) {
em::AllowNewUsersProto* allow = settings.mutable_allow_new_users();
bool allow_value;
if (value.GetAsBoolean(&allow_value)) {
allow->set_allow_new_users(allow_value);
} else {
NOTREACHED();
}
} else if (path == kAccountsPrefAllowGuest) {
em::GuestModeEnabledProto* guest = settings.mutable_guest_mode_enabled();
bool guest_value;
if (value.GetAsBoolean(&guest_value))
guest->set_guest_mode_enabled(guest_value);
else
NOTREACHED();
} else if (path == kAccountsPrefSupervisedUsersEnabled) {
em::SupervisedUsersSettingsProto* supervised =
settings.mutable_supervised_users_settings();
bool supervised_value;
if (value.GetAsBoolean(&supervised_value))
supervised->set_supervised_users_enabled(supervised_value);
else
NOTREACHED();
} else if (path == kAccountsPrefShowUserNamesOnSignIn) {
em::ShowUserNamesOnSigninProto* show = settings.mutable_show_user_names();
bool show_value;
if (value.GetAsBoolean(&show_value))
show->set_show_user_names(show_value);
else
NOTREACHED();
} else if (path == kAccountsPrefDeviceLocalAccounts) {
em::DeviceLocalAccountsProto* device_local_accounts =
settings.mutable_device_local_accounts();
device_local_accounts->clear_account();
const base::ListValue* accounts_list = NULL;
if (value.GetAsList(&accounts_list)) {
for (base::ListValue::const_iterator entry(accounts_list->begin());
entry != accounts_list->end();
++entry) {
const base::DictionaryValue* entry_dict = NULL;
if ((*entry)->GetAsDictionary(&entry_dict)) {
em::DeviceLocalAccountInfoProto* account =
device_local_accounts->add_account();
std::string account_id;
if (entry_dict->GetStringWithoutPathExpansion(
kAccountsPrefDeviceLocalAccountsKeyId, &account_id)) {
account->set_account_id(account_id);
}
int type;
if (entry_dict->GetIntegerWithoutPathExpansion(
kAccountsPrefDeviceLocalAccountsKeyType, &type)) {
account->set_type(
static_cast<em::DeviceLocalAccountInfoProto::AccountType>(
type));
}
std::string kiosk_app_id;
if (entry_dict->GetStringWithoutPathExpansion(
kAccountsPrefDeviceLocalAccountsKeyKioskAppId,
&kiosk_app_id)) {
account->mutable_kiosk_app()->set_app_id(kiosk_app_id);
}
} else {
NOTREACHED();
}
}
} else {
NOTREACHED();
}
} else if (path == kAccountsPrefDeviceLocalAccountAutoLoginId) {
em::DeviceLocalAccountsProto* device_local_accounts =
settings.mutable_device_local_accounts();
std::string id;
if (value.GetAsString(&id))
device_local_accounts->set_auto_login_id(id);
else
NOTREACHED();
} else if (path == kAccountsPrefDeviceLocalAccountAutoLoginDelay) {
em::DeviceLocalAccountsProto* device_local_accounts =
settings.mutable_device_local_accounts();
int delay;
if (value.GetAsInteger(&delay))
device_local_accounts->set_auto_login_delay(delay);
else
NOTREACHED();
} else if (path == kAccountsPrefDeviceLocalAccountAutoLoginBailoutEnabled) {
em::DeviceLocalAccountsProto* device_local_accounts =
settings.mutable_device_local_accounts();
bool enabled;
if (value.GetAsBoolean(&enabled))
device_local_accounts->set_enable_auto_login_bailout(enabled);
else
NOTREACHED();
} else if (path ==
kAccountsPrefDeviceLocalAccountPromptForNetworkWhenOffline) {
em::DeviceLocalAccountsProto* device_local_accounts =
settings.mutable_device_local_accounts();
bool should_prompt;
if (value.GetAsBoolean(&should_prompt))
device_local_accounts->set_prompt_for_network_when_offline(should_prompt);
else
NOTREACHED();
} else if (path == kSignedDataRoamingEnabled) {
em::DataRoamingEnabledProto* roam = settings.mutable_data_roaming_enabled();
bool roaming_value = false;
if (value.GetAsBoolean(&roaming_value))
roam->set_data_roaming_enabled(roaming_value);
else
NOTREACHED();
} else if (path == kReleaseChannel) {
em::ReleaseChannelProto* release_channel =
settings.mutable_release_channel();
std::string channel_value;
if (value.GetAsString(&channel_value))
release_channel->set_release_channel(channel_value);
else
NOTREACHED();
} else if (path == kStatsReportingPref) {
em::MetricsEnabledProto* metrics = settings.mutable_metrics_enabled();
bool metrics_value = false;
if (value.GetAsBoolean(&metrics_value))
metrics->set_metrics_enabled(metrics_value);
else
NOTREACHED();
} else if (path == kAccountsPrefUsers) {
em::UserWhitelistProto* whitelist_proto = settings.mutable_user_whitelist();
whitelist_proto->clear_user_whitelist();
const base::ListValue* users;
if (value.GetAsList(&users)) {
for (base::ListValue::const_iterator i = users->begin();
i != users->end();
++i) {
std::string email;
if ((*i)->GetAsString(&email))
whitelist_proto->add_user_whitelist(email);
}
}
} else if (path == kAccountsPrefEphemeralUsersEnabled) {
em::EphemeralUsersEnabledProto* ephemeral_users_enabled =
settings.mutable_ephemeral_users_enabled();
bool ephemeral_users_enabled_value = false;
if (value.GetAsBoolean(&ephemeral_users_enabled_value)) {
ephemeral_users_enabled->set_ephemeral_users_enabled(
ephemeral_users_enabled_value);
} else {
NOTREACHED();
}
} else if (path == kAllowRedeemChromeOsRegistrationOffers) {
em::AllowRedeemChromeOsRegistrationOffersProto* allow_redeem_offers =
settings.mutable_allow_redeem_offers();
bool allow_redeem_offers_value;
if (value.GetAsBoolean(&allow_redeem_offers_value)) {
allow_redeem_offers->set_allow_redeem_offers(allow_redeem_offers_value);
} else {
NOTREACHED();
}
} else if (path == kStartUpFlags) {
em::StartUpFlagsProto* flags_proto = settings.mutable_start_up_flags();
flags_proto->Clear();
const base::ListValue* flags;
if (value.GetAsList(&flags)) {
for (base::ListValue::const_iterator i = flags->begin();
i != flags->end();
++i) {
std::string flag;
if ((*i)->GetAsString(&flag))
flags_proto->add_flags(flag);
}
}
} else if (path == kSystemUse24HourClock) {
em::SystemUse24HourClockProto* use_24hour_clock_proto =
settings.mutable_use_24hour_clock();
use_24hour_clock_proto->Clear();
bool use_24hour_clock_value;
if (value.GetAsBoolean(&use_24hour_clock_value)) {
use_24hour_clock_proto->set_use_24hour_clock(use_24hour_clock_value);
} else {
NOTREACHED();
}
} else if (path == kAttestationForContentProtectionEnabled) {
em::AttestationSettingsProto* attestation_settings =
settings.mutable_attestation_settings();
bool setting_enabled;
if (value.GetAsBoolean(&setting_enabled)) {
attestation_settings->set_content_protection_enabled(setting_enabled);
} else {
NOTREACHED();
}
} else {
// The remaining settings don't support Set(), since they are not
// intended to be customizable by the user:
// kAccountsPrefTransferSAMLCookies
// kAppPack
// kDeviceAttestationEnabled
// kDeviceOwner
// kIdleLogoutTimeout
// kIdleLogoutWarningDuration
// kReleaseChannelDelegated
// kReportDeviceActivityTimes
// kReportDeviceBootMode
// kReportDeviceLocation
// kReportDeviceVersionInfo
// kReportDeviceNetworkInterfaces
// kReportDeviceUsers
// kScreenSaverExtensionId
// kScreenSaverTimeout
// kServiceAccountIdentity
// kStartUpUrls
// kSystemTimezonePolicy
// kVariationsRestrictParameter
LOG(FATAL) << "Device setting " << path << " is read-only.";
}
}
void OwnerSettingsServiceChromeOS::OnPostKeypairLoadedActions() {
DCHECK(thread_checker_.CalledOnValidThread());
user_id_ = profile_->GetProfileName();
const bool is_owner = IsOwner() || IsOwnerInTests(user_id_);
if (is_owner && device_settings_service_)
device_settings_service_->InitOwner(user_id_, weak_factory_.GetWeakPtr());
}
void OwnerSettingsServiceChromeOS::ReloadKeypairImpl(const base::Callback<
void(const scoped_refptr<PublicKey>& public_key,
const scoped_refptr<PrivateKey>& private_key)>& callback) {
DCHECK(thread_checker_.CalledOnValidThread());
if (waiting_for_profile_creation_ || waiting_for_tpm_token_)
return;
scoped_refptr<base::TaskRunner> task_runner =
BrowserThread::GetBlockingPool()->GetTaskRunnerWithShutdownBehavior(
base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
task_runner->PostTask(
FROM_HERE,
base::Bind(&LoadPrivateKey,
owner_key_util_,
ProfileHelper::GetUserIdHashFromProfile(profile_),
callback));
}
void OwnerSettingsServiceChromeOS::StoreDeviceSettings() {
if (!has_pending_changes_ || store_settings_factory_.HasWeakPtrs())
return;
if (!UpdateFromService())
return;
scoped_ptr<em::PolicyData> policy = AssemblePolicy(
user_id_, device_settings_service_->policy_data(), &device_settings_);
has_pending_changes_ = false;
bool rv = AssembleAndSignPolicyAsync(
content::BrowserThread::GetBlockingPool(),
policy.Pass(),
base::Bind(&OwnerSettingsServiceChromeOS::OnPolicyAssembledAndSigned,
store_settings_factory_.GetWeakPtr()));
if (!rv)
OnSignedPolicyStored(false /* success */);
}
void OwnerSettingsServiceChromeOS::OnPolicyAssembledAndSigned(
scoped_ptr<em::PolicyFetchResponse> policy_response) {
if (!policy_response.get() || !device_settings_service_) {
OnSignedPolicyStored(false /* success */);
return;
}
device_settings_service_->Store(
policy_response.Pass(),
base::Bind(&OwnerSettingsServiceChromeOS::OnSignedPolicyStored,
store_settings_factory_.GetWeakPtr(),
true /* success */));
}
void OwnerSettingsServiceChromeOS::OnSignedPolicyStored(bool success) {
store_settings_factory_.InvalidateWeakPtrs();
FOR_EACH_OBSERVER(OwnerSettingsService::Observer,
observers_,
OnSignedPolicyStored(success));
StoreDeviceSettings();
if (!success)
has_pending_changes_ = true;
}
bool OwnerSettingsServiceChromeOS::UpdateFromService() {
if (!device_settings_service_ ||
device_settings_service_->status() !=
DeviceSettingsService::STORE_SUCCESS ||
!device_settings_service_->device_settings()) {
return false;
}
enterprise_management::ChromeDeviceSettingsProto settings =
*device_settings_service_->device_settings();
settings.MergeFrom(device_settings_);
device_settings_.Swap(&settings);
return true;
}
} // namespace chromeos