Add a passphrase dialog for managed user accounts.

chrome/browser/ui/webui/managed_user_passphrase_dialog.cc

+// Copyright (c) 2013 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/ui/webui/managed_user_passphrase_dialog.h"
+
+#include <string>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/memory/weak_ptr.h"
+#include "base/prefs/pref_service.h"
+#include "base/values.h"
+#include "chrome/browser/managed_mode/managed_user_passphrase.h"
+#include "chrome/browser/managed_mode/managed_user_service.h"
+#include "chrome/browser/managed_mode/managed_user_service_factory.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/webui/constrained_web_dialog_ui.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/common/url_constants.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_ui_data_source.h"
+#include "content/public/browser/web_ui_message_handler.h"
+#include "grit/browser_resources.h"
+#include "grit/generated_resources.h"
+#include "ui/gfx/size.h"
+
+namespace {
+
+// Handles the message when the user entered a passphrase and clicks the Unlock
+// button.
+class ManagedUserPassphraseDialogMessageHandler
+    : public content::WebUIMessageHandler {
+
+ public:
+  ManagedUserPassphraseDialogMessageHandler();
+  virtual ~ManagedUserPassphraseDialogMessageHandler() {}
+
+  // content::WebUIMessageHandler implementation.
+  virtual void RegisterMessages() OVERRIDE;
+
+ private:
+  // Gets called from the UI with the entered passphrase as a parameter. The
+  // correctness of the passphrase is checked and the result is returned to the
+  // UI.
+  void CheckPassphrase(const base::ListValue* args) const;
+
+  base::WeakPtrFactory<ManagedUserPassphraseDialogMessageHandler> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ManagedUserPassphraseDialogMessageHandler);
+};
+
+ManagedUserPassphraseDialogMessageHandler
+    ::ManagedUserPassphraseDialogMessageHandler() : weak_factory_(this) {
+}
+
+void ManagedUserPassphraseDialogMessageHandler::RegisterMessages() {
+  web_ui()->RegisterMessageCallback(
+      "checkPassphrase",
+      base::Bind(&ManagedUserPassphraseDialogMessageHandler::CheckPassphrase,
+                 weak_factory_.GetWeakPtr()));
+}
+
+void ManagedUserPassphraseDialogMessageHandler::CheckPassphrase(
+    const base::ListValue* args) const {
+  // Extract the passphrase from the provided ListValue parameter.
+  const base::Value* passphrase_arg = NULL;
+  args->Get(0, &passphrase_arg);
+  std::string passphrase;
+  passphrase_arg->GetAsString(&passphrase);
+
+  // Get the hashed passphrase and the salt that was used to calculate it.
+  Profile* profile = Profile::FromWebUI(web_ui());
+  PrefService* pref_service = profile->GetPrefs();
+  std::string stored_passphrase_hash =
+      pref_service->GetString(prefs::kManagedModeLocalPassphrase);
+  std::string salt = pref_service->GetString(prefs::kManagedModeLocalSalt);
+
+  // Calculate the hash of the entered passphrase.
+  ManagedUserPassphrase passphrase_key_generator(salt);
+  std::string encoded_passphrase_hash;
+  passphrase_key_generator.GenerateHashFromPassphrase(passphrase,
+                                                      &encoded_passphrase_hash);
+
+  // Check if the entered passphrase is correct and possibly set the managed
+  // user into the elevated state which for example allows to modify settings.
+  ManagedUserService* managed_user_service =
+      ManagedUserServiceFactory::GetForProfile(profile);
+  if (stored_passphrase_hash == encoded_passphrase_hash) {
+    managed_user_service->SetElevated(true);
+    web_ui()->CallJavascriptFunction("passphraseCorrect");
+  } else {
+    managed_user_service->SetElevated(false);
+    web_ui()->CallJavascriptFunction("passphraseIncorrect");
+  }
+}
+
+}  // namespace
+
+ManagedUserPassphraseDialog::ManagedUserPassphraseDialog(
+    content::WebContents* web_contents,
+    const PassphraseCheckedCallback& callback) : callback_(callback) {
+  Profile* profile =
+      Profile::FromBrowserContext(web_contents->GetBrowserContext());
+  CreateDataSource(profile);
+  CreateConstrainedWebDialog(profile, this, NULL, web_contents);
+}
+
+
+ui::ModalType ManagedUserPassphraseDialog::GetDialogModalType() const {
+  return ui::MODAL_TYPE_WINDOW;
+}
+
+string16 ManagedUserPassphraseDialog::GetDialogTitle() const {
+  return string16();
+}
+
+GURL ManagedUserPassphraseDialog::GetDialogContentURL() const {
+  return GURL(chrome::kChromeUIManagedUserPassphrasePageURL);
+}
+
+void ManagedUserPassphraseDialog::GetWebUIMessageHandlers(
+    std::vector<content::WebUIMessageHandler*>* handlers) const {
+  DCHECK(handlers);
+  // The constrained window delegate takes care of registering the handler.
+  // The handler is also deleted automatically.
+  handlers->push_back(new ManagedUserPassphraseDialogMessageHandler());
+}
+
+void ManagedUserPassphraseDialog::GetDialogSize(gfx::Size* size) const {
+  const int kDialogWidth = 400;
+  const int kDialogHeight = 310;
+  size->SetSize(kDialogWidth, kDialogHeight);
+}
+
+std::string ManagedUserPassphraseDialog::GetDialogArgs() const {
+  return std::string();
+}
+
+void ManagedUserPassphraseDialog::OnDialogClosed(
+    const std::string& json_retval) {
+  if (!callback_.is_null()) {
+    callback_.Run(!json_retval.empty());
+    callback_.Reset();
+  }
+}
+
+void ManagedUserPassphraseDialog::OnCloseContents(
+    content::WebContents* source, bool* out_close_dialog) {
+}
+
+bool ManagedUserPassphraseDialog::ShouldShowDialogTitle() const {
+  return false;
+}
+
+ManagedUserPassphraseDialog::~ManagedUserPassphraseDialog() {
+}
+
+void ManagedUserPassphraseDialog::CreateDataSource(Profile* profile) const {
+  content::WebUIDataSource* data_source = content::WebUIDataSource::Create(
+      chrome::kChromeUIManagedUserPassphrasePageHost);
+  data_source->SetDefaultResource(IDR_MANAGED_USER_PASSPHRASE_DIALOG_HTML);
+  data_source->AddResourcePath("managed_user_passphrase_dialog.js",
+                               IDR_MANAGED_USER_PASSPHRASE_DIALOG_JS);
+  data_source->AddResourcePath("managed_user_passphrase_dialog.css",
+                               IDR_MANAGED_USER_PASSPHRASE_DIALOG_CSS);
+  data_source->AddResourcePath("managed_user.png",
+                               IDR_MANAGED_USER_PASSPHRASE_DIALOG_IMG);
+  data_source->AddLocalizedString("managedModePassphrasePage",
+                                  IDS_PASSPHRASE_TITLE);
+  data_source->AddLocalizedString("unlockPassphraseButton",
+                                  IDS_UNLOCK_PASSPHRASE_BUTTON);
+  data_source->AddLocalizedString("passphraseInstruction",
+                                  IDS_PASSPHRASE_INSTRUCTION);
+  data_source->AddLocalizedString("incorrectPassphraseWarning",
+                                  IDS_INCORRECT_PASSPHRASE_WARNING);
+  data_source->AddLocalizedString("cancelPassphraseButton", IDS_CANCEL);
+  data_source->SetJsonPath("strings.js");
+  data_source->SetUseJsonJSFormatV2();
+  content::WebUIDataSource::Add(profile, data_source);
+}