[Autofill] Add protobuf for Google Wallet risk parameters and a utility function for filling it out.

chrome/browser/autofill/risk/fingerprint.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/autofill/risk/fingerprint.h"
+
+#include "base/bind.h"
+#include "base/callback.h"
+#include "base/cpu.h"
+#include "base/logging.h"
+#include "base/prefs/public/pref_service_base.h"
+#include "base/string_split.h"
+#include "base/sys_info.h"
+#include "base/time.h"
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/autofill/risk/proto/fingerprint.pb.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/prefs/pref_service_simple.h"
+#include "chrome/common/chrome_version_info.h"
+#include "chrome/common/pref_names.h"
+#include "content/public/browser/content_browser_client.h"
+#include "content/public/browser/font_list_async.h"
+#include "content/public/browser/gpu_data_manager.h"
+#include "content/public/browser/gpu_data_manager_observer.h"
+#include "content/public/browser/plugin_service.h"
+#include "content/public/common/content_client.h"
+#include "content/public/common/gpu_info.h"
+#include "ui/gfx/rect.h"
+#include "ui/gfx/screen.h"
+#include "webkit/plugins/webplugininfo.h"
+
+namespace autofill {
+namespace risk {
+
+namespace {
+
+const int32 kFingerprinterVersion = 1;
+
+// Returns the delta between the time at which Chrome was installed and the Unix
+// epoch.
+base::TimeDelta GetInstallTimestamp() {
+  // TODO(isherman): If we keep this implementation, the metric should probably
+  // be renamed; or at least the comments for it should be updated.
+  PrefServiceBase* prefs = g_browser_process->local_state();
+  base::Time install_time = base::Time::FromTimeT(
+      prefs->GetInt64(prefs::kUninstallMetricsInstallDate));
+  // The install date should always be available and initialized.
+  DCHECK(!install_time.is_null());
+  return install_time - base::Time::UnixEpoch();
+}
+
+// Returns the delta between the local timezone and UTC.
+base::TimeDelta GetTimezoneOffset() {
+  base::Time utc = base::Time::Now();
+
+  base::Time::Exploded local;
+  utc.LocalExplode(&local);
+
+  return base::Time::FromUTCExploded(local) - utc;
+}
+
+// Returns the concatenation of the operating system name and version, e.g.
+// "Mac OS X 10.6.8".
+std::string GetOperatingSystemVersion() {
+  return base::SysInfo::OperatingSystemName() + " " +
+      base::SysInfo::OperatingSystemVersion();
+}
+
+// Adds the list of |fonts| to the |fingerprint|.
+void AddFontsToFingerprint(const base::ListValue& fonts,
+                           Fingerprint_MachineCharacteristics* fingerprint) {
+  for (base::ListValue::const_iterator it = fonts.begin();
+       it != fonts.end(); ++it) {
+    // Each item in the list is a two-element list such that the first element
+    // is the font family and the second is the font name.
+    const base::ListValue* font_description;
+    bool success = (*it)->GetAsList(&font_description);
+    DCHECK(success);
+
+    std::string font_name;
+    success = font_description->GetString(1, &font_name);
+    DCHECK(success);
+
+    fingerprint->add_font(font_name);
+  }
+}
+
+// Adds the list of |plugins| to the |fingerprint|.
+void AddPluginsToFingerprint(const std::vector<webkit::WebPluginInfo>& plugins,
+                             Fingerprint_MachineCharacteristics* fingerprint) {
+  for (std::vector<webkit::WebPluginInfo>::const_iterator it = plugins.begin();
+       it != plugins.end(); ++it) {
+    Fingerprint_MachineCharacteristics_Plugin* plugin =
+        fingerprint->add_plugin();
+    plugin->set_name(UTF16ToUTF8(it->name));
+    plugin->set_description(UTF16ToUTF8(it->desc));
+    for (std::vector<webkit::WebPluginMimeType>::const_iterator mime_type =
+             it->mime_types.begin();
+         mime_type != it->mime_types.end(); ++mime_type) {
+      plugin->add_mime_type(mime_type->mime_type);
+    }
+    plugin->set_version(UTF16ToUTF8(it->version));
+  }
+}
+
+// Adds the list of HTTP accept languages in |prefs| to the |fingerprint|.
+void AddAcceptLanguagesToFingerprint(
+    const std::string& accept_languages_str,
+    Fingerprint_MachineCharacteristics* fingerprint) {
+  std::vector<std::string> accept_languages;
+  base::SplitString(accept_languages_str, ',', &accept_languages);
+  for (std::vector<std::string>::const_iterator it = accept_languages.begin();
+       it != accept_languages.end(); ++it) {
+    fingerprint->add_requested_language(*it);
+  }
+}
+
+// Writes the number of screens and the primary display's screen size into the
+// |fingerprint|.
+void AddScreenInfoToFingerprint(
+    Fingerprint_MachineCharacteristics* fingerprint) {
+  // TODO(scottmg): NativeScreen maybe wrong. http://crbug.com/133312

[Ilya Sherman, 2012/12/27 00:18:12]

Scott, I copied this TODO from metrics_log.cc.  Is it still relevant?  I tried
reading through the linked bug, but couldn't tell how it applied to this code.

+  fingerprint->set_screen_count(
+      gfx::Screen::GetNativeScreen()->GetNumDisplays());
+
+  gfx::Size screen_size =
+      gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().GetSizeInPixel();
+  fingerprint->mutable_screen_size()->set_width(screen_size.width());
+  fingerprint->mutable_screen_size()->set_height(screen_size.height());
+}
+
+// Writes info about the machine's CPU into the |fingerprint|.
+void AddCpuInfoToFingerprint(Fingerprint_MachineCharacteristics* fingerprint) {
+  base::CPU cpu;
+  fingerprint->mutable_cpu()->set_vendor_name(cpu.vendor_name());
+  fingerprint->mutable_cpu()->set_brand(cpu.cpu_brand());
+}
+
+// Writes info about the machine's GPU into the |fingerprint|.
+void AddGpuInfoToFingerprint(Fingerprint_MachineCharacteristics* fingerprint) {
+  const content::GPUInfo& gpu_info =
+      content::GpuDataManager::GetInstance()->GetGPUInfo();
+  DCHECK(gpu_info.finalized);
+
+  Fingerprint_MachineCharacteristics_Graphics* graphics =
+      fingerprint->mutable_graphics_card();
+  graphics->set_vendor_id(gpu_info.gpu.vendor_id);
+  graphics->set_device_id(gpu_info.gpu.device_id);
+  graphics->set_driver_version(gpu_info.driver_version);
+  graphics->set_driver_date(gpu_info.driver_date);
+
+  Fingerprint_MachineCharacteristics_Graphics_PerformanceStatistics*
+      gpu_performance = graphics->mutable_performance_statistics();
+  gpu_performance->set_graphics_score(gpu_info.performance_stats.graphics);
+  gpu_performance->set_gaming_score(gpu_info.performance_stats.gaming);
+  gpu_performance->set_overall_score(gpu_info.performance_stats.overall);
+}
+
+// Waits for all asynchronous data required for the fingerprint to be loaded;
+// then fills out the fingerprint.
+class FingerprintDataLoader : public content::GpuDataManagerObserver {
+ public:
+  FingerprintDataLoader(
+      int64 gaia_id,
+      const gfx::Rect& window_bounds,
+      const gfx::Rect& content_bounds,
+      const PrefServiceBase& prefs,
+      const base::Callback<void(scoped_ptr<Fingerprint>)>& callback);
+
+ private:
+  virtual ~FingerprintDataLoader();
+
+  // content::GpuDataManagerObserver:
+  virtual void OnGpuInfoUpdate() OVERRIDE;
+  virtual void OnVideoMemoryUsageStatsUpdate(
+      const content::GPUVideoMemoryUsageStats& video_memory_usage_stats)
+      OVERRIDE;
+
+  // Callbacks for asynchronously loaded data.
+  void OnGotFonts(scoped_ptr<base::ListValue> fonts);
+  void OnGotPlugins(const std::vector<webkit::WebPluginInfo>& plugins);
+
+  // If all of the asynchronous data has been loaded, calls |callback_| with
+  // the fingerprint data.
+  void MaybeFillFingerprint();
+
+  // Calls |callback_| with the fingerprint data.
+  void FillFingerprint();
+
+  // The GPU data provider.
+  content::GpuDataManager* const gpu_data_manager_;
+
+  // Data that will be passed on to the next loading phase.
+  const int64 gaia_id_;
+  const gfx::Rect window_bounds_;
+  const gfx::Rect content_bounds_;
+  const std::string charset_;
+  const std::string accept_languages_;
+
+  // Data that will be loaded asynchronously.
+  scoped_ptr<base::ListValue> fonts_;
+  std::vector<webkit::WebPluginInfo> plugins_;
+  bool has_loaded_plugins_;
+
+  // The callback that will be called once all the data is available.
+  base::Callback<void(scoped_ptr<Fingerprint>)> callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(FingerprintDataLoader);
+};
+
+FingerprintDataLoader::FingerprintDataLoader(
+    int64 gaia_id,
+    const gfx::Rect& window_bounds,
+    const gfx::Rect& content_bounds,
+    const PrefServiceBase& prefs,
+    const base::Callback<void(scoped_ptr<Fingerprint>)>& callback)
+    : gpu_data_manager_(content::GpuDataManager::GetInstance()),
+      gaia_id_(gaia_id),
+      window_bounds_(window_bounds),
+      content_bounds_(content_bounds),
+      charset_(prefs.GetString(prefs::kDefaultCharset)),
+      accept_languages_(prefs.GetString(prefs::kAcceptLanguages)),
+      has_loaded_plugins_(false),
+      callback_(callback) {
+  // Load GPU data if needed.
+  if (!gpu_data_manager_->IsCompleteGpuInfoAvailable()) {
+    gpu_data_manager_->AddObserver(this);
+    gpu_data_manager_->RequestCompleteGpuInfoIfNeeded();
+  }
+
+  // Load plugin data.
+  content::PluginService::GetInstance()->GetPlugins(
+      base::Bind(&FingerprintDataLoader::OnGotPlugins, base::Unretained(this)));
+
+  // Load font data.
+  content::GetFontListAsync(
+      base::Bind(&FingerprintDataLoader::OnGotFonts, base::Unretained(this)));
+}
+
+FingerprintDataLoader::~FingerprintDataLoader() {
+}
+
+void FingerprintDataLoader::OnGpuInfoUpdate() {
+  if (!gpu_data_manager_->IsCompleteGpuInfoAvailable())
+    return;
+
+  gpu_data_manager_->RemoveObserver(this);
+  MaybeFillFingerprint();
+}
+
+void FingerprintDataLoader::OnVideoMemoryUsageStatsUpdate(
+    const content::GPUVideoMemoryUsageStats& video_memory_usage_stats) {
+}
+
+void FingerprintDataLoader::OnGotFonts(scoped_ptr<base::ListValue> fonts) {
+  DCHECK(!fonts_);
+  fonts_.reset(fonts.release());
+  MaybeFillFingerprint();
+}
+
+void FingerprintDataLoader::OnGotPlugins(
+    const std::vector<webkit::WebPluginInfo>& plugins) {
+  DCHECK(!has_loaded_plugins_);
+  has_loaded_plugins_ = true;
+  plugins_ = plugins;
+  MaybeFillFingerprint();
+}
+
+void FingerprintDataLoader::MaybeFillFingerprint() {
+  // If all of the data has been loaded, fill the fingerprint and clean up.
+  if (gpu_data_manager_->IsCompleteGpuInfoAvailable() &&
+      fonts_ &&
+      has_loaded_plugins_) {
+    FillFingerprint();
+    delete this;
+  }
+}
+
+void FingerprintDataLoader::FillFingerprint() {
+  scoped_ptr<Fingerprint> fingerprint(new Fingerprint);
+  Fingerprint_MachineCharacteristics* machine =
+      fingerprint->mutable_machine_characteristics();
+
+  machine->set_operating_system_build(GetOperatingSystemVersion());
+  machine->set_browser_install_time_ms(GetInstallTimestamp().InMilliseconds());
+  machine->set_utc_offset_ms(GetTimezoneOffset().InMilliseconds());
+  machine->set_browser_language(
+      content::GetContentClient()->browser()->GetApplicationLocale());
+  machine->set_charset(charset_);
+  machine->set_user_agent(content::GetContentClient()->GetUserAgent());
+  machine->set_ram(base::SysInfo::AmountOfPhysicalMemory());
+  machine->set_browser_build(chrome::VersionInfo().Version());
+  AddFontsToFingerprint(*fonts_, machine);
+  AddPluginsToFingerprint(plugins_, machine);
+  AddAcceptLanguagesToFingerprint(accept_languages_, machine);
+  AddScreenInfoToFingerprint(machine);
+  AddCpuInfoToFingerprint(machine);
+  AddGpuInfoToFingerprint(machine);
+
+  // TODO(isherman): Store the user's screen color depth by refactoring the code
+  // for RenderWidgetHostImpl::GetWebScreenInfo().
+  // TODO(isherman): Store the user's unavailable screen size, likewise by
+  // fetching the WebScreenInfo that RenderWidgetHostImpl::GetWebScreenInfo()
+  // provides.
+  // TODO(isherman): Store the partition size of the hard drives?
+
+  Fingerprint_TransientState* transient_state =
+      fingerprint->mutable_transient_state();
+  Fingerprint_Dimension* inner_window_size =
+      transient_state->mutable_inner_window_size();
+  inner_window_size->set_width(content_bounds_.width());
+  inner_window_size->set_height(content_bounds_.height());
+  Fingerprint_Dimension* outer_window_size =
+      transient_state->mutable_outer_window_size();
+  outer_window_size->set_width(window_bounds_.width());
+  outer_window_size->set_height(window_bounds_.height());
+
+  // TODO(isherman): Record network performance data, which is theoretically
+  // available to JS.
+
+  // TODO(isherman): Record user behavior data.
+
+  Fingerprint_Metadata* metadata = fingerprint->mutable_metadata();
+  metadata->set_timestamp_ms(
+      (base::Time::Now() - base::Time::UnixEpoch()).InMilliseconds());
+  metadata->set_gaia_id(gaia_id_);
+  metadata->set_fingerprinter_version(kFingerprinterVersion);
+
+  callback_.Run(fingerprint.Pass());
+}
+
+}  // namespace
+
+void GetFingerprint(
+    int64 gaia_id,
+    const gfx::Rect& window_bounds,
+    const gfx::Rect& content_bounds,
+    const PrefServiceBase& prefs,
+    const base::Callback<void(scoped_ptr<Fingerprint>)>& callback) {
+  // TODO(isherman): Add a DCHECK that the ToS have been accepted prior to
+  // calling into this method.
+
+  // Begin loading all of the data that we need to load asynchronously.
+  // This class is responsible for freeing its own memory.
+  new FingerprintDataLoader(gaia_id, window_bounds, content_bounds, prefs,
+                            callback);
+}
+
+}  // namespace risk
+}  // namespace autofill