Implement new-style CloudPolicyStore for Chrome OS device policy.

chrome/browser/policy/device_cloud_policy_store_chromeos.cc

+// Copyright (c) 2012 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/policy/device_cloud_policy_store_chromeos.h"
+
+#include "base/bind.h"
+#include "chrome/browser/policy/device_policy_decoder_chromeos.h"
+#include "chrome/browser/policy/enterprise_install_attributes.h"
+#include "chrome/browser/policy/proto/chrome_device_policy.pb.h"
+#include "chrome/browser/policy/proto/device_management_backend.pb.h"
+
+namespace em = enterprise_management;
+
+namespace policy {
+
+DeviceCloudPolicyStoreChromeOS::DeviceCloudPolicyStoreChromeOS(
+    chromeos::DeviceSettingsService* device_settings_service,
+    EnterpriseInstallAttributes* install_attributes)
+    : device_settings_service_(device_settings_service),
+      install_attributes_(install_attributes),
+      ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)) {
+  device_settings_service_->AddObserver(this);
+}
+
+DeviceCloudPolicyStoreChromeOS::~DeviceCloudPolicyStoreChromeOS() {
+  device_settings_service_->RemoveObserver(this);
+}
+
+void DeviceCloudPolicyStoreChromeOS::Store(
+    const em::PolicyFetchResponse& policy) {
+  // Cancel all pending requests.
+  weak_factory_.InvalidateWeakPtrs();
+
+  scoped_refptr<chromeos::OwnerKey> owner_key(
+      device_settings_service_->GetOwnerKey());
+  if (!install_attributes_->IsEnterpriseDevice() ||
+      !device_settings_service_->policy_data() ||
+      !owner_key || !owner_key->public_key()) {
+    status_ = STATUS_BAD_STATE;
+    NotifyStoreError();
+    return;
+  }
+
+  scoped_ptr<DeviceCloudPolicyValidator> validator(CreateValidator(policy));
+  validator->ValidateSignature(*owner_key->public_key(), true);
+  validator->ValidateAgainstCurrentPolicy(
+      device_settings_service_->policy_data(), false);
+  validator.release()->StartValidation();
+}
+
+void DeviceCloudPolicyStoreChromeOS::Load() {
+  device_settings_service_->Load();
+}
+
+void DeviceCloudPolicyStoreChromeOS::RemoveStoredPolicy() {
+  // Device policy cannot and should not be removed on Chrome OS.
+  NOTREACHED();
+}
+
+void DeviceCloudPolicyStoreChromeOS::InstallInitialPolicy(
+    const em::PolicyFetchResponse& policy) {
+  // Cancel all pending requests.
+  weak_factory_.InvalidateWeakPtrs();
+
+  if (!install_attributes_->IsEnterpriseDevice() &&
+      device_settings_service_->status() !=
+          chromeos::DeviceSettingsService::STORE_NO_POLICY) {
+    status_ = STATUS_BAD_STATE;
+    NotifyStoreError();
+    return;
+  }
+
+  scoped_ptr<DeviceCloudPolicyValidator> validator(CreateValidator(policy));
+  validator->ValidateInitialKey();
+  validator.release()->StartValidation();
+}
+
+void DeviceCloudPolicyStoreChromeOS::OwnershipStatusChanged() {
+  // Nothing to do.
+}
+
+void DeviceCloudPolicyStoreChromeOS::DeviceSettingsUpdated() {
+  if (!weak_factory_.HasWeakPtrs())
+    UpdateFromService();
+}
+
+scoped_ptr<DeviceCloudPolicyValidator>
+    DeviceCloudPolicyStoreChromeOS::CreateValidator(
+        const em::PolicyFetchResponse& policy) {
+  scoped_ptr<DeviceCloudPolicyValidator> validator(
+      DeviceCloudPolicyValidator::Create(
+          scoped_ptr<em::PolicyFetchResponse>(
+              new em::PolicyFetchResponse(policy)),
+          base::Bind(&DeviceCloudPolicyStoreChromeOS::OnPolicyToStoreValidated,
+                     weak_factory_.GetWeakPtr())));
+  validator->ValidateDomain(install_attributes_->GetDomain());
+  validator->ValidatePolicyType(dm_protocol::kChromeDevicePolicyType);
+  validator->ValidatePayload();
+  return validator.Pass();
+}
+
+void DeviceCloudPolicyStoreChromeOS::OnPolicyToStoreValidated(
+    DeviceCloudPolicyValidator* validator) {
+  if (!validator->success()) {
+    status_ = STATUS_VALIDATION_ERROR;
+    validation_status_ = validator->status();
+    NotifyStoreError();
+    return;
+  }
+
+  device_settings_service_->Store(
+      validator->policy().Pass(),
+      base::Bind(&DeviceCloudPolicyStoreChromeOS::OnPolicyStored,
+                 weak_factory_.GetWeakPtr()));
+}
+
+void DeviceCloudPolicyStoreChromeOS::OnPolicyStored() {
+  UpdateFromService();
+}
+
+void DeviceCloudPolicyStoreChromeOS::UpdateFromService() {
+  if (!install_attributes_->IsEnterpriseDevice()) {
+    status_ = STATUS_BAD_STATE;
+    NotifyStoreError();
+    return;
+  }
+
+  switch (device_settings_service_->status()) {
+    case chromeos::DeviceSettingsService::STORE_SUCCESS: {
+      status_ = STATUS_OK;
+      policy_.reset(new em::PolicyData());
+      if (device_settings_service_->policy_data())
+        policy_->MergeFrom(*device_settings_service_->policy_data());
+
+      PolicyMap new_policy_map;
+      if (is_managed()) {
+        DecodeDevicePolicy(*device_settings_service_->device_settings(),
+                           &new_policy_map, install_attributes_);
+      }
+      policy_map_.Swap(&new_policy_map);
+
+      NotifyStoreLoaded();
+      return;
+    }
+    case chromeos::DeviceSettingsService::STORE_KEY_UNAVAILABLE:
+      status_ = STATUS_BAD_STATE;
+      break;
+    case chromeos::DeviceSettingsService::STORE_POLICY_ERROR:
+    case chromeos::DeviceSettingsService::STORE_OPERATION_FAILED:
+      status_ = STATUS_STORE_ERROR;
+      break;
+    case chromeos::DeviceSettingsService::STORE_NO_POLICY:
+    case chromeos::DeviceSettingsService::STORE_INVALID_POLICY:
+    case chromeos::DeviceSettingsService::STORE_VALIDATION_ERROR:
+      status_ = STATUS_LOAD_ERROR;
+      break;
+  }
+
+  NotifyStoreError();
+}
+
+}  // namespace policy