chromeos: Remove CryptohomeLibrary::TpmGetPassword and TpmIsReady

chrome/browser/ui/webui/chromeos/cryptohome_ui.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/ui/webui/chromeos/cryptohome_ui.h"
+
+#include "base/bind.h"
+#include "chrome/browser/chromeos/cros/cros_library.h"
+#include "chrome/browser/chromeos/cros/cryptohome_library.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/webui/chrome_web_ui_data_source.h"
+#include "chrome/common/url_constants.h"
+#include "chromeos/dbus/cryptohome_client.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "content/public/browser/web_ui.h"
+#include "content/public/browser/web_ui_message_handler.h"
+#include "crypto/nss_util.h"
+#include "grit/browser_resources.h"
+
+namespace chromeos {
+
+namespace {
+
+// Returns HTML data source for chrome://cryptohome.
+ChromeWebUIDataSource* CreateCryptohomeUIHTMLSource() {
+  ChromeWebUIDataSource* source =
+      new ChromeWebUIDataSource(chrome::kChromeUICryptohomeHost);
+  source->add_resource_path("cryptohome.js", IDR_CRYPTOHOME_JS);
+  source->set_default_resource(IDR_CRYPTOHOME_HTML);
+  return source;
+}
+
+// Class to handle messages from chrome://cryptohome.
+class CryptohomeWebUIHandler : public content::WebUIMessageHandler {
+ public:
+  CryptohomeWebUIHandler() : weak_ptr_factory_(this) {}

[Evan Stade, 2012/07/19 01:53:16]

this gets its own file please

[hashimoto, 2012/07/19 07:14:54]

Done.

+
+  virtual ~CryptohomeWebUIHandler() {}
+
+  // WebUIMessageHandler override.
+  virtual void RegisterMessages() OVERRIDE {
+    web_ui()->RegisterMessageCallback(
+        "requestCryptohomeProperty",
+        base::Bind(&CryptohomeWebUIHandler::OnRequestCryptohomeProperty,
+                   weak_ptr_factory_.GetWeakPtr()));
+  }
+
+ private:
+  // This method is called from JavaScript.
+  void OnRequestCryptohomeProperty(const base::ListValue* args) {
+    std::string destination_id;
+    if (!args->GetString(0, &destination_id)) {
+      DLOG(ERROR) << "Invalid arguments.";
+      return;
+    }
+    CryptohomeClient* cryptohome_client =
+        DBusThreadManager::Get()->GetCryptohomeClient();
+    CryptohomeLibrary* cryptohome_library =
+        CrosLibrary::Get()->GetCryptohomeLibrary();
+    if (destination_id == "is-mounted") {
+      SetCryptohomeBoolProperty(destination_id,

[Evan Stade, 2012/07/19 01:53:16]

all this should just be stuffed into loadTimeData. on the C++ side it looks like

  source->AddString(...)

in CreateCryptohomeUIHTMLSource. For booleans you can either add to the
localized_strings Dictionary directly or you could add a AddBoolean function
that parallels AddString.

[hashimoto, 2012/07/19 07:14:54]

The problem with setting values to loadTimeData is that some values like
TpmIsReady are returned asynchronously. (and all Cryptohome property getters are
going to be asynchronous, crbug.com/126674)
So I prefer handling JS calls to halting page load until all asynchronous values
get ready.

Does this make sense?

+                                cryptohome_library->IsMounted());
+    } else if (destination_id == "tpm-is-ready") {
+      cryptohome_client->TpmIsReady(GetCryptohomeBoolCallback(destination_id));
+    } else if (destination_id == "tpm-is-enabled") {
+      SetCryptohomeBoolProperty(destination_id,
+                                cryptohome_library->TpmIsEnabled());
+    } else if (destination_id == "tpm-is-owned") {
+      SetCryptohomeBoolProperty(destination_id,
+                                cryptohome_library->TpmIsOwned());
+    } else if (destination_id == "tpm-is-being-owned") {
+      SetCryptohomeBoolProperty(destination_id,
+                                cryptohome_library->TpmIsBeingOwned());
+    } else if (destination_id == "pkcs11-is-tpm-token-ready") {
+      cryptohome_client->Pkcs11IsTpmTokenReady(
+          GetCryptohomeBoolCallback(destination_id));
+    } else if (destination_id == "is-tpm-token-ready") {
+      SetCryptohomeBoolProperty(destination_id, crypto::IsTPMTokenReady());
+    } else if (destination_id == "token-name") {
+      std::string token_name;
+      if (crypto::IsTPMTokenReady())
+        crypto::GetTPMTokenInfo(&token_name, NULL);
+      SetCryptohomeStringProperty(destination_id, token_name);
+    } else if (destination_id == "user-pin") {
+      std::string user_pin;
+      if (crypto::IsTPMTokenReady())
+        crypto::GetTPMTokenInfo(NULL, &user_pin);
+      SetCryptohomeStringProperty(destination_id, user_pin);
+    } else {
+      NOTREACHED();
+    }
+  }
+
+  // Returns a callback to handle Cryptohome property values.
+  CryptohomeClient::BoolMethodCallback GetCryptohomeBoolCallback(
+      const std::string& destination_id) {
+    return base::Bind(&CryptohomeWebUIHandler::OnCryptohomeBoolProperty,
+                      weak_ptr_factory_.GetWeakPtr(),
+                      destination_id);
+  }
+
+  // This method is called when Cryptohome D-Bus method call completes.
+  void OnCryptohomeBoolProperty(const std::string& destination_id,
+                                DBusMethodCallStatus call_status,
+                                bool value) {
+    if (call_status != DBUS_METHOD_CALL_SUCCESS)
+      value = false;
+    SetCryptohomeBoolProperty(destination_id, value);
+  }
+
+  // Sets textcontent of the element whose id is |destination_id| to true/false.
+  void SetCryptohomeBoolProperty(const std::string& destination_id,
+                                 bool value) {
+    SetCryptohomeStringProperty(destination_id,
+                                value ? "true" : "false");
+  }
+
+  // Sets textcontent of the element whose id is |destination_id| to |value|.
+  void SetCryptohomeStringProperty(const std::string& destination_id,
+                                   const std::string& value) {
+    web_ui()->CallJavascriptFunction("SetCryptohomeProperty",
+                                     base::StringValue(destination_id),
+                                     base::StringValue(value));
+  }
+
+  base::WeakPtrFactory<CryptohomeWebUIHandler> weak_ptr_factory_;
+  DISALLOW_COPY_AND_ASSIGN(CryptohomeWebUIHandler);
+};
+
+}  // namespace
+
+CryptohomeUI::CryptohomeUI(content::WebUI* web_ui) : WebUIController(web_ui) {
+  web_ui->AddMessageHandler(new CryptohomeWebUIHandler());
+
+  Profile* profile = Profile::FromWebUI(web_ui);
+  ChromeURLDataManager::AddDataSource(profile, CreateCryptohomeUIHTMLSource());
+}
+
+}  // namespace chromeos