Serialize Google Update state as part of the recovery component update checks.

components/component_updater/updater_state_win.cc

+
+// Copyright (c) 2016 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 "components/component_updater/updater_state_win.h"
+
+#include <utility>
+
+#include "base/memory/ptr_util.h"
+#include "base/strings/string16.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/utf_string_conversions.h"
+
+#include "base/win/registry.h"
+#include "base/win/win_util.h"
+
+namespace component_updater {
+
+namespace {
+
+// Google Update group policy settings.
+const wchar_t kGoogleUpdatePoliciesKey[] =
+    L"SOFTWARE\\Policies\\Google\\Update";
+const wchar_t kCheckPeriodOverrideMinutes[] = L"AutoUpdateCheckPeriodMinutes";
+const wchar_t kUpdatePolicyValue[] = L"UpdateDefault";
+const wchar_t kChromeUpdatePolicyOverride[] =
+    L"Update{8A69D345-D564-463C-AFF1-A69D9E530F96}";
+
+// Don't allow update periods longer than six weeks (Chrome release cadence).
+const int kCheckPeriodOverrideMinutesMax = 60 * 24 * 7 * 6;
+
+// Google Update registry settings.
+const wchar_t kRegPathGoogleUpdate[] = L"Software\\Google\\Update";
+const wchar_t kRegPathClients[] = L"Software\\Google\\Update\\Clients";
+const wchar_t kRegPathClientsGoogleUpdate[] =
+    L"Software\\Google\\Update\\Clients\\"
+    L"{430FD4D0-B729-4F61-AA34-91526481799D}";
+const wchar_t kRegValueGoogleUpdatePv[] = L"pv";
+const wchar_t kRegValueLastStartedAU[] = L"LastStartedAU";
+const wchar_t kRegValueLastChecked[] = L"LastChecked";
+
+}  // namespace
+
+UpdaterState::UpdaterState(bool is_machine) : is_machine_(is_machine) {}
+
+std::unique_ptr<UpdaterState> UpdaterState::Create(bool is_machine) {
+  std::unique_ptr<UpdaterState> updater_state(new UpdaterState(is_machine));
+  updater_state->ReadState();
+  return std::move(updater_state);
+}
+
+void UpdaterState::ReadState() {
+  google_update_version_ = GetGoogleUpdateVersion(is_machine_);
+  last_autoupdate_started_ = GetGoogleUpdateLastStartedAU(is_machine_);
+  last_checked_ = GetGoogleUpdateLastChecked(is_machine_);
+  is_joined_to_domain_ = IsJoinedToDomain();
+  is_autoupdate_check_enabled_ = IsAutoupdateCheckEnabled();
+  chrome_update_policy_ = GetChromeUpdatePolicy();
+}
+
+update_client::InstallerAttributes UpdaterState::MakeInstallerAttributes()
+    const {
+  update_client::InstallerAttributes installer_attributes;
+
+  if (google_update_version_.IsValid())
+    installer_attributes["googleupdatever"] =
+        google_update_version_.GetString();
+
+  const base::Time now = base::Time::NowFromSystemTime();
+  if (!last_autoupdate_started_.is_null())
+    installer_attributes["laststarted"] =
+        NormalizeTimeDelta(now - last_autoupdate_started_);
+  if (!last_checked_.is_null())
+    installer_attributes["lastchecked"] =
+        NormalizeTimeDelta(now - last_checked_);
+
+  installer_attributes["domainjoined"] = is_joined_to_domain_ ? "1" : "0";
+  installer_attributes["autoupdatecheckenabled"] =
+      is_autoupdate_check_enabled_ ? "1" : "0";
+
+  DCHECK(chrome_update_policy_ >= 0 && chrome_update_policy_ <= 3 ||
+         chrome_update_policy_ == -1);
+  installer_attributes["chromeupdatepolicy"] =
+      base::IntToString(chrome_update_policy_);
+
+  return installer_attributes;
+}
+
+std::string UpdaterState::NormalizeTimeDelta(const base::TimeDelta& delta) {
+  const base::TimeDelta two_weeks = base::TimeDelta::FromDays(14);
+  const base::TimeDelta two_months = base::TimeDelta::FromDays(60);
+
+  std::string val;  // Contains the value to return in hours.
+  if (delta <= two_weeks) {
+    val = "0";
+  } else if (two_weeks < delta && delta <= two_months) {
+    val = "408";  // 2 weeks in hours.
+  } else {
+    val = "1440";  // 2 months in hours.

[waffles, 2016/08/25 23:17:55]

Maybe stick with 28-day long "months"? (1344)

[Sorin Jianu, 2016/08/25 23:20:47]

Done.

+  }
+
+  DCHECK(!val.empty());
+  return val;
+}
+
+base::Version UpdaterState::GetGoogleUpdateVersion(bool is_machine) {
+  const HKEY root_key = is_machine ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
+  base::string16 version;
+  base::win::RegKey key;
+
+  if (key.Open(root_key, kRegPathClientsGoogleUpdate,
+               KEY_QUERY_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS &&
+      key.ReadValue(kRegValueGoogleUpdatePv, &version) == ERROR_SUCCESS) {
+    return base::Version(base::UTF16ToUTF8(version));
+  }
+
+  return base::Version();
+}
+
+base::Time UpdaterState::GetGoogleUpdateLastStartedAU(bool is_machine) {
+  return GetGoogleUpdateTimeValue(is_machine, kRegValueLastStartedAU);
+}
+
+base::Time UpdaterState::GetGoogleUpdateLastChecked(bool is_machine) {
+  return GetGoogleUpdateTimeValue(is_machine, kRegValueLastChecked);
+}
+
+base::Time UpdaterState::GetGoogleUpdateTimeValue(bool is_machine,
+                                                  const wchar_t* value_name) {
+  const HKEY root_key = is_machine ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
+  base::win::RegKey update_key;
+
+  if (update_key.Open(root_key, kRegPathGoogleUpdate,
+                      KEY_QUERY_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS) {
+    DWORD value(0);
+    if (update_key.ReadValueDW(value_name, &value) == ERROR_SUCCESS) {
+      return base::Time::FromTimeT(value);
+    }
+  }
+
+  return base::Time();
+}
+
+bool UpdaterState::IsAutoupdateCheckEnabled() {
+  // Check the auto-update check period override. If it is 0 or exceeds the
+  // maximum timeout, then for all intents and purposes auto updates are
+  // disabled.
+  base::win::RegKey policy_key;
+  DWORD value = 0;
+  if (policy_key.Open(HKEY_LOCAL_MACHINE, kGoogleUpdatePoliciesKey,
+                      KEY_QUERY_VALUE) == ERROR_SUCCESS &&
+      policy_key.ReadValueDW(kCheckPeriodOverrideMinutes, &value) ==
+          ERROR_SUCCESS &&
+      (value == 0 || value > kCheckPeriodOverrideMinutesMax)) {

[waffles, 2016/08/25 23:17:55]

Is it possible for value < 0? If so, what happens in this case?

[Sorin Jianu, 2016/08/25 23:20:47]

it is an unsigned type.

+    return false;
+  }
+
+  return true;
+}
+
+// Returns -1 if the policy is not found or the value was invalid. Otherwise,
+// returns a value in the [0, 3] range, representing the value of the
+// Chrome update group policy.
+int UpdaterState::GetChromeUpdatePolicy() {
+  const int kMaxUpdatePolicyValue = 3;
+
+  base::win::RegKey policy_key;
+
+  if (policy_key.Open(HKEY_LOCAL_MACHINE, kGoogleUpdatePoliciesKey,
+                      KEY_QUERY_VALUE) != ERROR_SUCCESS) {
+    return -1;
+  }
+
+  DWORD value = 0;
+  // First try to read the Chrome-specific override.
+  if (policy_key.ReadValueDW(kChromeUpdatePolicyOverride, &value) ==
+          ERROR_SUCCESS &&
+      value <= kMaxUpdatePolicyValue) {
+    return value;
+  }
+
+  // Try to read default override.
+  if (policy_key.ReadValueDW(kUpdatePolicyValue, &value) == ERROR_SUCCESS &&
+      value <= kMaxUpdatePolicyValue) {
+    return value;
+  }
+
+  return -1;
+}
+
+bool UpdaterState::IsJoinedToDomain() {
+  return base::win::IsEnrolledToDomain();
+}
+
+}  // namespace component_updater