Revert of Non-plafrom-specific part of an OwnerSettingsService is moved to components/ownership/*.

chrome/browser/chromeos/ownership/owner_settings_service.cc

+// 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.h"
+
+#include <string>
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/command_line.h"
+#include "base/prefs/pref_service.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/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/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 {
+
+DeviceSettingsService* g_device_settings_service_for_testing = NULL;
+
+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;
+}
+
+// Assembles PolicyData based on |settings|, |policy_data| and
+// |user_id|.
+scoped_ptr<em::PolicyData> 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();
+}
+
+std::string AssembleAndSignPolicy(scoped_ptr<em::PolicyData> policy,
+                                  crypto::RSAPrivateKey* private_key) {
+  // Assemble the policy.
+  em::PolicyFetchResponse policy_response;
+  if (!policy->SerializeToString(policy_response.mutable_policy_data())) {
+    LOG(ERROR) << "Failed to encode policy payload.";
+    return std::string();
+  }
+
+  // Generate the signature.
+  scoped_ptr<crypto::SignatureCreator> signature_creator(
+      crypto::SignatureCreator::Create(private_key));
+  signature_creator->Update(
+      reinterpret_cast<const uint8*>(policy_response.policy_data().c_str()),
+      policy_response.policy_data().size());
+  std::vector<uint8> signature_bytes;
+  std::string policy_blob;
+  if (!signature_creator->Final(&signature_bytes)) {
+    LOG(ERROR) << "Failed to create policy signature.";
+    return std::string();
+  }
+
+  policy_response.mutable_policy_data_signature()->assign(
+      reinterpret_cast<const char*>(vector_as_array(&signature_bytes)),
+      signature_bytes.size());
+  return policy_response.SerializeAsString();
+}
+
+void LoadPrivateKeyByPublicKey(
+    const scoped_refptr<OwnerKeyUtil>& owner_key_util,
+    scoped_refptr<PublicKey> public_key,
+    const std::string& username_hash,
+    const base::Callback<void(scoped_refptr<PublicKey> public_key,
+                              scoped_refptr<PrivateKey> private_key)>&
+        callback) {
+  crypto::EnsureNSSInit();
+  crypto::ScopedPK11Slot slot =
+      crypto::GetPublicSlotForChromeOSUser(username_hash);
+  scoped_refptr<PrivateKey> private_key(new PrivateKey(
+      owner_key_util->FindPrivateKeyInSlot(public_key->data(), 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(
+                        scoped_refptr<PublicKey> public_key,
+                        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 OwnerSettingsService::IsOwnerCallback& callback) {
+  if (!owner_key_util) {
+    callback.Run(false);
+    return;
+  }
+  scoped_refptr<base::TaskRunner> task_runner =
+      content::BrowserThread::GetBlockingPool()
+          ->GetTaskRunnerWithShutdownBehavior(
+              base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
+  base::PostTaskAndReplyWithResult(
+      task_runner.get(),
+      FROM_HERE,
+      base::Bind(&DoesPrivateKeyExistAsyncHelper, owner_key_util),
+      callback);
+}
+
+// Returns the current management mode.
+em::PolicyData::ManagementMode GetManagementMode(
+    DeviceSettingsService* service) {
+  if (!service) {
+    LOG(ERROR) << "DeviceSettingsService is not initialized";
+    return em::PolicyData::NOT_MANAGED;
+  }
+
+  const em::PolicyData* policy_data = service->policy_data();
+  if (policy_data && policy_data->has_management_mode())
+    return policy_data->management_mode();
+  return em::PolicyData::NOT_MANAGED;
+}
+
+// Returns true if it is okay to transfer from the current mode to the new
+// mode. This function should be called in SetManagementMode().
+bool CheckManagementModeTransition(em::PolicyData::ManagementMode current_mode,
+                                   em::PolicyData::ManagementMode new_mode) {
+  // Mode is not changed.
+  if (current_mode == new_mode)
+    return true;
+
+  switch (current_mode) {
+    case em::PolicyData::NOT_MANAGED:
+      // For consumer management enrollment.
+      return new_mode == em::PolicyData::CONSUMER_MANAGED;
+
+    case em::PolicyData::ENTERPRISE_MANAGED:
+      // Management mode cannot be set when it is currently ENTERPRISE_MANAGED.
+      return false;
+
+    case em::PolicyData::CONSUMER_MANAGED:
+      // For consumer management unenrollment.
+      return new_mode == em::PolicyData::NOT_MANAGED;
+  }
+
+  NOTREACHED();
+  return false;
+}
+
+}  // namespace
+
+OwnerSettingsService::OwnerSettingsService(
+    Profile* profile,
+    const scoped_refptr<OwnerKeyUtil>& owner_key_util)
+    : profile_(profile),
+      owner_key_util_(owner_key_util),
+      waiting_for_profile_creation_(true),
+      waiting_for_tpm_token_(true),
+      weak_factory_(this) {
+  if (TPMTokenLoader::IsInitialized()) {
+    TPMTokenLoader::TPMTokenStatus tpm_token_status =
+        TPMTokenLoader::Get()->IsTPMTokenEnabled(
+            base::Bind(&OwnerSettingsService::OnTPMTokenReady, as_weak_ptr()));
+    waiting_for_tpm_token_ =
+        tpm_token_status == TPMTokenLoader::TPM_TOKEN_STATUS_UNDETERMINED;
+  }
+
+  if (DBusThreadManager::IsInitialized() &&
+      DBusThreadManager::Get()->GetSessionManagerClient()) {
+    DBusThreadManager::Get()->GetSessionManagerClient()->AddObserver(this);
+  }
+
+  registrar_.Add(this,
+                 chrome::NOTIFICATION_PROFILE_CREATED,
+                 content::Source<Profile>(profile_));
+}
+
+OwnerSettingsService::~OwnerSettingsService() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (DBusThreadManager::IsInitialized() &&
+      DBusThreadManager::Get()->GetSessionManagerClient()) {
+    DBusThreadManager::Get()->GetSessionManagerClient()->RemoveObserver(this);
+  }
+}
+
+bool OwnerSettingsService::IsOwner() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  return private_key_ && private_key_->key();
+}
+
+void OwnerSettingsService::IsOwnerAsync(const IsOwnerCallback& callback) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (private_key_) {
+    base::MessageLoop::current()->PostTask(FROM_HERE,
+                                           base::Bind(callback, IsOwner()));
+  } else {
+    pending_is_owner_callbacks_.push_back(callback);
+  }
+}
+
+bool OwnerSettingsService::AssembleAndSignPolicyAsync(
+    scoped_ptr<em::PolicyData> policy,
+    const AssembleAndSignPolicyCallback& callback) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (!IsOwner())
+    return false;
+  base::PostTaskAndReplyWithResult(
+      BrowserThread::GetBlockingPool(),
+      FROM_HERE,
+      base::Bind(
+          &AssembleAndSignPolicy, base::Passed(&policy), private_key_->key()),
+      callback);
+  return true;
+}
+
+void OwnerSettingsService::SignAndStoreAsync(
+    scoped_ptr<em::ChromeDeviceSettingsProto> settings,
+    const base::Closure& callback) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  scoped_ptr<em::PolicyData> policy = AssemblePolicy(
+      user_id_, GetDeviceSettingsService()->policy_data(), settings.get());
+  if (!policy) {
+    HandleError(DeviceSettingsService::STORE_POLICY_ERROR, callback);
+    return;
+  }
+
+  EnqueueSignAndStore(policy.Pass(), callback);
+}
+
+void OwnerSettingsService::SetManagementSettingsAsync(
+    em::PolicyData::ManagementMode management_mode,
+    const std::string& request_token,
+    const std::string& device_id,
+    const base::Closure& callback) {
+  em::PolicyData::ManagementMode current_mode =
+      GetManagementMode(GetDeviceSettingsService());
+  if (!CheckManagementModeTransition(current_mode, management_mode)) {
+    LOG(ERROR) << "Invalid management mode transition: current mode = "
+               << current_mode << ", new mode = " << management_mode;
+    HandleError(DeviceSettingsService::STORE_POLICY_ERROR, callback);
+    return;
+  }
+
+  DeviceSettingsService* service = GetDeviceSettingsService();
+  scoped_ptr<em::PolicyData> policy = AssemblePolicy(
+      user_id_, service->policy_data(), service->device_settings());
+  if (!policy) {
+    HandleError(DeviceSettingsService::STORE_POLICY_ERROR, callback);
+    return;
+  }
+
+  policy->set_management_mode(management_mode);
+  policy->set_request_token(request_token);
+  policy->set_device_id(device_id);
+
+  EnqueueSignAndStore(policy.Pass(), callback);
+}
+
+void OwnerSettingsService::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;
+  ReloadPrivateKey();
+}
+
+void OwnerSettingsService::OnTPMTokenReady(bool /* unused 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.
+  ReloadPrivateKey();
+}
+
+void OwnerSettingsService::OwnerKeySet(bool success) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (success)
+    ReloadPrivateKey();
+}
+
+// static
+void OwnerSettingsService::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
+void OwnerSettingsService::SetDeviceSettingsServiceForTesting(
+    DeviceSettingsService* device_settings_service) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  g_device_settings_service_for_testing = device_settings_service;
+}
+
+void OwnerSettingsService::ReloadPrivateKey() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (waiting_for_profile_creation_ || waiting_for_tpm_token_)
+    return;
+  scoped_refptr<base::TaskRunner> task_runner =
+      content::BrowserThread::GetBlockingPool()
+          ->GetTaskRunnerWithShutdownBehavior(
+              base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
+  task_runner->PostTask(
+      FROM_HERE,
+      base::Bind(&LoadPrivateKey,
+                 GetOwnerKeyUtil(),
+                 ProfileHelper::GetUserIdHashFromProfile(profile_),
+                 base::Bind(&OwnerSettingsService::OnPrivateKeyLoaded,
+                            weak_factory_.GetWeakPtr())));
+}
+
+void OwnerSettingsService::OnPrivateKeyLoaded(
+    scoped_refptr<PublicKey> public_key,
+    scoped_refptr<PrivateKey> private_key) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  public_key_ = public_key;
+  private_key_ = private_key;
+
+  user_id_ = profile_->GetProfileName();
+  const bool is_owner = IsOwner() || IsOwnerInTests(user_id_);
+  if (is_owner && GetDeviceSettingsService())
+    GetDeviceSettingsService()->InitOwner(user_id_, weak_factory_.GetWeakPtr());
+
+  std::vector<IsOwnerCallback> is_owner_callbacks;
+  is_owner_callbacks.swap(pending_is_owner_callbacks_);
+  for (std::vector<IsOwnerCallback>::iterator it(is_owner_callbacks.begin());
+       it != is_owner_callbacks.end();
+       ++it) {
+    it->Run(is_owner);
+  }
+}
+
+void OwnerSettingsService::EnqueueSignAndStore(
+    scoped_ptr<em::PolicyData> policy,
+    const base::Closure& callback) {
+  SignAndStoreSettingsOperation* operation = new SignAndStoreSettingsOperation(
+      base::Bind(&OwnerSettingsService::HandleCompletedOperation,
+                 weak_factory_.GetWeakPtr(),
+                 callback),
+      policy.Pass());
+  operation->set_delegate(weak_factory_.GetWeakPtr());
+  pending_operations_.push_back(operation);
+  if (pending_operations_.front() == operation)
+    StartNextOperation();
+}
+
+void OwnerSettingsService::StartNextOperation() {
+  DeviceSettingsService* service = GetDeviceSettingsService();
+  if (!pending_operations_.empty() && service &&
+      service->session_manager_client()) {
+    pending_operations_.front()->Start(
+        service->session_manager_client(), GetOwnerKeyUtil(), public_key_);
+  }
+}
+
+void OwnerSettingsService::HandleCompletedOperation(
+    const base::Closure& callback,
+    SessionManagerOperation* operation,
+    DeviceSettingsService::Status status) {
+  DCHECK_EQ(operation, pending_operations_.front());
+
+  DeviceSettingsService* service = GetDeviceSettingsService();
+  if (status == DeviceSettingsService::STORE_SUCCESS) {
+    service->set_policy_data(operation->policy_data().Pass());
+    service->set_device_settings(operation->device_settings().Pass());
+  }
+
+  if ((operation->public_key() && !public_key_) ||
+      (operation->public_key() && public_key_ &&
+       operation->public_key()->data() != public_key_->data())) {
+    // Public part changed so we need to reload private part too.
+    ReloadPrivateKey();
+    content::NotificationService::current()->Notify(
+        chrome::NOTIFICATION_OWNERSHIP_STATUS_CHANGED,
+        content::Source<OwnerSettingsService>(this),
+        content::NotificationService::NoDetails());
+  }
+  service->OnSignAndStoreOperationCompleted(status);
+  if (!callback.is_null())
+    callback.Run();
+
+  pending_operations_.pop_front();
+  delete operation;
+  StartNextOperation();
+}
+
+void OwnerSettingsService::HandleError(DeviceSettingsService::Status status,
+                                       const base::Closure& callback) {
+  LOG(ERROR) << "Session manager operation failed: " << status;
+  GetDeviceSettingsService()->OnSignAndStoreOperationCompleted(status);
+  if (!callback.is_null())
+    callback.Run();
+}
+
+scoped_refptr<OwnerKeyUtil> OwnerSettingsService::GetOwnerKeyUtil() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  return owner_key_util_;
+}
+
+DeviceSettingsService* OwnerSettingsService::GetDeviceSettingsService() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (g_device_settings_service_for_testing)
+    return g_device_settings_service_for_testing;
+  if (DeviceSettingsService::IsInitialized())
+    return DeviceSettingsService::Get();
+  return NULL;
+}
+
+}  // namespace chromeos