google_update_settings.cc revision 116680a4aac90f2aa7413d9095a592090648e557 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/installer/util/google_update_settings.h"
6
7#include <algorithm>
8
9#include "base/command_line.h"
10#include "base/files/file_path.h"
11#include "base/logging.h"
12#include "base/metrics/histogram.h"
13#include "base/path_service.h"
14#include "base/strings/string_number_conversions.h"
15#include "base/strings/string_util.h"
16#include "base/strings/utf_string_conversions.h"
17#include "base/threading/thread_restrictions.h"
18#include "base/time/time.h"
19#include "base/win/registry.h"
20#include "base/win/win_util.h"
21#include "chrome/common/chrome_switches.h"
22#include "chrome/installer/util/app_registration_data.h"
23#include "chrome/installer/util/browser_distribution.h"
24#include "chrome/installer/util/channel_info.h"
25#include "chrome/installer/util/google_update_constants.h"
26#include "chrome/installer/util/google_update_experiment_util.h"
27#include "chrome/installer/util/install_util.h"
28#include "chrome/installer/util/installation_state.h"
29#include "chrome/installer/util/product.h"
30
31using base::win::RegKey;
32using installer::InstallationState;
33
34const wchar_t GoogleUpdateSettings::kPoliciesKey[] =
35    L"SOFTWARE\\Policies\\Google\\Update";
36const wchar_t GoogleUpdateSettings::kUpdatePolicyValue[] = L"UpdateDefault";
37const wchar_t GoogleUpdateSettings::kUpdateOverrideValuePrefix[] = L"Update";
38const wchar_t GoogleUpdateSettings::kCheckPeriodOverrideMinutes[] =
39    L"AutoUpdateCheckPeriodMinutes";
40
41// Don't allow update periods longer than six weeks.
42const int GoogleUpdateSettings::kCheckPeriodOverrideMinutesMax =
43    60 * 24 * 7 * 6;
44
45const GoogleUpdateSettings::UpdatePolicy
46GoogleUpdateSettings::kDefaultUpdatePolicy =
47#if defined(GOOGLE_CHROME_BUILD)
48    GoogleUpdateSettings::AUTOMATIC_UPDATES;
49#else
50    GoogleUpdateSettings::UPDATES_DISABLED;
51#endif
52
53namespace {
54
55bool ReadGoogleUpdateStrKey(const wchar_t* const name, base::string16* value) {
56  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
57  base::string16 reg_path = dist->GetStateKey();
58  RegKey key(HKEY_CURRENT_USER, reg_path.c_str(), KEY_READ | KEY_WOW64_32KEY);
59  if (key.ReadValue(name, value) != ERROR_SUCCESS) {
60    RegKey hklm_key(
61        HKEY_LOCAL_MACHINE, reg_path.c_str(), KEY_READ | KEY_WOW64_32KEY);
62    return (hklm_key.ReadValue(name, value) == ERROR_SUCCESS);
63  }
64  return true;
65}
66
67// Updates a registry key |name| to be |value| for the given |app_reg_data|.
68// If this is a |system_install|, then update the value under HKLM (istead of
69// HKCU for user-installs) using a group of keys (one for each OS user) and also
70// include the method to |aggregate| these values when reporting.
71bool WriteGoogleUpdateStrKeyInternal(const AppRegistrationData& app_reg_data,
72                                     bool system_install,
73                                     const wchar_t* const name,
74                                     const base::string16& value,
75                                     const wchar_t* const aggregate) {
76  const REGSAM kAccess = KEY_SET_VALUE | KEY_WOW64_32KEY;
77  if (system_install) {
78    DCHECK(aggregate);
79    // Machine installs require each OS user to write a unique key under a
80    // named key in HKLM as well as an "aggregation" function that describes
81    // how the values of multiple users are to be combined.
82    base::string16 uniquename;
83    if (!base::win::GetUserSidString(&uniquename)) {
84      NOTREACHED();
85      return false;
86    }
87
88    base::string16 reg_path(app_reg_data.GetStateMediumKey());
89    reg_path.append(L"\\");
90    reg_path.append(name);
91    RegKey key(HKEY_LOCAL_MACHINE, reg_path.c_str(), kAccess);
92    key.WriteValue(google_update::kRegAggregateMethod, aggregate);
93    return (key.WriteValue(uniquename.c_str(), value.c_str()) == ERROR_SUCCESS);
94  } else {
95    // User installs are easy: just write the values to HKCU tree.
96    RegKey key(HKEY_CURRENT_USER, app_reg_data.GetStateKey().c_str(), kAccess);
97    return (key.WriteValue(name, value.c_str()) == ERROR_SUCCESS);
98  }
99}
100
101bool WriteGoogleUpdateStrKey(const wchar_t* const name,
102                             const base::string16& value) {
103  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
104  return WriteGoogleUpdateStrKeyInternal(
105      dist->GetAppRegistrationData(), false, name, value, NULL);
106}
107
108bool ClearGoogleUpdateStrKey(const wchar_t* const name) {
109  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
110  base::string16 reg_path = dist->GetStateKey();
111  RegKey key(HKEY_CURRENT_USER,
112             reg_path.c_str(),
113             KEY_READ | KEY_WRITE | KEY_WOW64_32KEY);
114  base::string16 value;
115  if (key.ReadValue(name, &value) != ERROR_SUCCESS)
116    return false;
117  return (key.WriteValue(name, L"") == ERROR_SUCCESS);
118}
119
120bool RemoveGoogleUpdateStrKey(const wchar_t* const name) {
121  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
122  base::string16 reg_path = dist->GetStateKey();
123  RegKey key(HKEY_CURRENT_USER,
124             reg_path.c_str(),
125             KEY_READ | KEY_WRITE | KEY_WOW64_32KEY);
126  if (!key.HasValue(name))
127    return true;
128  return (key.DeleteValue(name) == ERROR_SUCCESS);
129}
130
131bool GetChromeChannelInternal(bool system_install,
132                              bool add_multi_modifier,
133                              base::string16* channel) {
134  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
135
136  // Shortcut in case this distribution knows what channel it is (canary).
137  if (dist->GetChromeChannel(channel))
138    return true;
139
140  // Determine whether or not chrome is multi-install. If so, updates are
141  // delivered under the binaries' app guid, so that's where the relevant
142  // channel is found.
143  installer::ProductState state;
144  installer::ChannelInfo channel_info;
145  ignore_result(state.Initialize(system_install, dist));
146  if (!state.is_multi_install()) {
147    // Use the channel info that was just read for this single-install chrome.
148    channel_info = state.channel();
149  } else {
150    // Read the channel info from the binaries' state key.
151    HKEY root_key = system_install ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
152    dist = BrowserDistribution::GetSpecificDistribution(
153        BrowserDistribution::CHROME_BINARIES);
154    RegKey key(root_key, dist->GetStateKey().c_str(),
155               KEY_READ | KEY_WOW64_32KEY);
156
157    if (!channel_info.Initialize(key)) {
158      channel->assign(installer::kChromeChannelUnknown);
159      return false;
160    }
161  }
162
163  if (!channel_info.GetChannelName(channel))
164    channel->assign(installer::kChromeChannelUnknown);
165
166  // Tag the channel name if this is a multi-install.
167  if (add_multi_modifier && state.is_multi_install()) {
168    if (!channel->empty())
169      channel->push_back(L'-');
170    channel->push_back(L'm');
171  }
172
173  return true;
174}
175
176// Populates |update_policy| with the UpdatePolicy enum value corresponding to a
177// DWORD read from the registry and returns true if |value| is within range.
178// If |value| is out of range, returns false without modifying |update_policy|.
179bool GetUpdatePolicyFromDword(
180    const DWORD value,
181    GoogleUpdateSettings::UpdatePolicy* update_policy) {
182  switch (value) {
183    case GoogleUpdateSettings::UPDATES_DISABLED:
184    case GoogleUpdateSettings::AUTOMATIC_UPDATES:
185    case GoogleUpdateSettings::MANUAL_UPDATES_ONLY:
186    case GoogleUpdateSettings::AUTO_UPDATES_ONLY:
187      *update_policy = static_cast<GoogleUpdateSettings::UpdatePolicy>(value);
188      return true;
189    default:
190      LOG(WARNING) << "Unexpected update policy override value: " << value;
191  }
192  return false;
193}
194
195// Convenience routine: GoogleUpdateSettings::UpdateDidRunStateForApp()
196// specialized for Chrome Binaries.
197bool UpdateDidRunStateForBinaries(bool did_run) {
198  BrowserDistribution* dist = BrowserDistribution::GetSpecificDistribution(
199      BrowserDistribution::CHROME_BINARIES);
200  return GoogleUpdateSettings::UpdateDidRunStateForApp(
201      dist->GetAppRegistrationData(), did_run);
202}
203
204}  // namespace
205
206bool GoogleUpdateSettings::IsSystemInstall() {
207  bool system_install = false;
208  base::FilePath module_dir;
209  if (!PathService::Get(base::DIR_MODULE, &module_dir)) {
210    LOG(WARNING)
211        << "Failed to get directory of module; assuming per-user install.";
212  } else {
213    system_install = !InstallUtil::IsPerUserInstall(module_dir.value().c_str());
214  }
215  return system_install;
216}
217
218bool GoogleUpdateSettings::GetCollectStatsConsent() {
219  return GetCollectStatsConsentAtLevel(IsSystemInstall());
220}
221
222// Older versions of Chrome unconditionally read from HKCU\...\ClientState\...
223// and then HKLM\...\ClientState\....  This means that system-level Chrome
224// never checked ClientStateMedium (which has priority according to Google
225// Update) and gave preference to a value in HKCU (which was never checked by
226// Google Update).  From now on, Chrome follows Google Update's policy.
227bool GoogleUpdateSettings::GetCollectStatsConsentAtLevel(bool system_install) {
228  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
229
230  // Consent applies to all products in a multi-install package.
231  if (InstallUtil::IsMultiInstall(dist, system_install)) {
232    dist = BrowserDistribution::GetSpecificDistribution(
233        BrowserDistribution::CHROME_BINARIES);
234  }
235
236  RegKey key;
237  DWORD value = 0;
238  bool have_value = false;
239  const REGSAM kAccess = KEY_QUERY_VALUE | KEY_WOW64_32KEY;
240
241  // For system-level installs, try ClientStateMedium first.
242  have_value =
243      system_install &&
244      key.Open(HKEY_LOCAL_MACHINE, dist->GetStateMediumKey().c_str(),
245               kAccess) == ERROR_SUCCESS &&
246      key.ReadValueDW(google_update::kRegUsageStatsField,
247                      &value) == ERROR_SUCCESS;
248
249  // Otherwise, try ClientState.
250  if (!have_value) {
251    have_value =
252        key.Open(system_install ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER,
253                 dist->GetStateKey().c_str(),
254                 kAccess) == ERROR_SUCCESS &&
255        key.ReadValueDW(google_update::kRegUsageStatsField,
256                        &value) == ERROR_SUCCESS;
257  }
258
259  // Google Update specifically checks that the value is 1, so we do the same.
260  return have_value && value == 1;
261}
262
263bool GoogleUpdateSettings::SetCollectStatsConsent(bool consented) {
264  return SetCollectStatsConsentAtLevel(IsSystemInstall(), consented);
265}
266
267bool GoogleUpdateSettings::SetCollectStatsConsentAtLevel(bool system_install,
268                                                         bool consented) {
269  // Google Update writes and expects 1 for true, 0 for false.
270  DWORD value = consented ? 1 : 0;
271
272  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
273
274  // Consent applies to all products in a multi-install package.
275  if (InstallUtil::IsMultiInstall(dist, system_install)) {
276    dist = BrowserDistribution::GetSpecificDistribution(
277        BrowserDistribution::CHROME_BINARIES);
278  }
279
280  // Write to ClientStateMedium for system-level; ClientState otherwise.
281  HKEY root_key = system_install ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
282  base::string16 reg_path =
283      system_install ? dist->GetStateMediumKey() : dist->GetStateKey();
284  RegKey key;
285  LONG result = key.Create(
286      root_key, reg_path.c_str(), KEY_SET_VALUE | KEY_WOW64_32KEY);
287  if (result != ERROR_SUCCESS) {
288    LOG(ERROR) << "Failed opening key " << reg_path << " to set "
289               << google_update::kRegUsageStatsField << "; result: " << result;
290  } else {
291    result = key.WriteValue(google_update::kRegUsageStatsField, value);
292    LOG_IF(ERROR, result != ERROR_SUCCESS) << "Failed setting "
293        << google_update::kRegUsageStatsField << " in key " << reg_path
294        << "; result: " << result;
295  }
296  return (result == ERROR_SUCCESS);
297}
298
299bool GoogleUpdateSettings::LoadMetricsClientId(std::string* metrics_id) {
300  base::string16 metrics_id16;
301  bool rv = ReadGoogleUpdateStrKey(google_update::kRegMetricsId, &metrics_id16);
302  *metrics_id = base::UTF16ToUTF8(metrics_id16);
303  return rv;
304}
305
306bool GoogleUpdateSettings::StoreMetricsClientId(const std::string& metrics_id) {
307  base::string16 metrics_id16 = base::UTF8ToUTF16(metrics_id);
308  return WriteGoogleUpdateStrKey(google_update::kRegMetricsId, metrics_id16);
309}
310
311// EULA consent is only relevant for system-level installs.
312bool GoogleUpdateSettings::SetEULAConsent(
313    const InstallationState& machine_state,
314    BrowserDistribution* dist,
315    bool consented) {
316  DCHECK(dist);
317  const DWORD eula_accepted = consented ? 1 : 0;
318  const REGSAM kAccess = KEY_SET_VALUE | KEY_WOW64_32KEY;
319  base::string16 reg_path = dist->GetStateMediumKey();
320  bool succeeded = true;
321  RegKey key;
322
323  // Write the consent value into the product's ClientStateMedium key.
324  if (key.Create(HKEY_LOCAL_MACHINE, reg_path.c_str(),
325                 kAccess) != ERROR_SUCCESS ||
326      key.WriteValue(google_update::kRegEULAAceptedField,
327                     eula_accepted) != ERROR_SUCCESS) {
328    succeeded = false;
329  }
330
331  // If this is a multi-install, also write it into the binaries' key.
332  // --mutli-install is not provided on the command-line, so deduce it from
333  // the product's state.
334  const installer::ProductState* product_state =
335      machine_state.GetProductState(true, dist->GetType());
336  if (product_state != NULL && product_state->is_multi_install()) {
337    dist = BrowserDistribution::GetSpecificDistribution(
338        BrowserDistribution::CHROME_BINARIES);
339    reg_path = dist->GetStateMediumKey();
340    if (key.Create(HKEY_LOCAL_MACHINE, reg_path.c_str(),
341                   kAccess) != ERROR_SUCCESS ||
342        key.WriteValue(google_update::kRegEULAAceptedField,
343                       eula_accepted) != ERROR_SUCCESS) {
344        succeeded = false;
345    }
346  }
347
348  return succeeded;
349}
350
351int GoogleUpdateSettings::GetLastRunTime() {
352  base::string16 time_s;
353  if (!ReadGoogleUpdateStrKey(google_update::kRegLastRunTimeField, &time_s))
354    return -1;
355  int64 time_i;
356  if (!base::StringToInt64(time_s, &time_i))
357    return -1;
358  base::TimeDelta td =
359      base::Time::NowFromSystemTime() - base::Time::FromInternalValue(time_i);
360  return td.InDays();
361}
362
363bool GoogleUpdateSettings::SetLastRunTime() {
364  int64 time = base::Time::NowFromSystemTime().ToInternalValue();
365  return WriteGoogleUpdateStrKey(google_update::kRegLastRunTimeField,
366                                 base::Int64ToString16(time));
367}
368
369bool GoogleUpdateSettings::RemoveLastRunTime() {
370  return RemoveGoogleUpdateStrKey(google_update::kRegLastRunTimeField);
371}
372
373bool GoogleUpdateSettings::GetBrowser(base::string16* browser) {
374  return ReadGoogleUpdateStrKey(google_update::kRegBrowserField, browser);
375}
376
377bool GoogleUpdateSettings::GetLanguage(base::string16* language) {
378  return ReadGoogleUpdateStrKey(google_update::kRegLangField, language);
379}
380
381bool GoogleUpdateSettings::GetBrand(base::string16* brand) {
382  return ReadGoogleUpdateStrKey(google_update::kRegRLZBrandField, brand);
383}
384
385bool GoogleUpdateSettings::GetReactivationBrand(base::string16* brand) {
386  return ReadGoogleUpdateStrKey(google_update::kRegRLZReactivationBrandField,
387                                brand);
388}
389
390bool GoogleUpdateSettings::GetClient(base::string16* client) {
391  return ReadGoogleUpdateStrKey(google_update::kRegClientField, client);
392}
393
394bool GoogleUpdateSettings::SetClient(const base::string16& client) {
395  return WriteGoogleUpdateStrKey(google_update::kRegClientField, client);
396}
397
398bool GoogleUpdateSettings::GetReferral(base::string16* referral) {
399  return ReadGoogleUpdateStrKey(google_update::kRegReferralField, referral);
400}
401
402bool GoogleUpdateSettings::ClearReferral() {
403  return ClearGoogleUpdateStrKey(google_update::kRegReferralField);
404}
405
406bool GoogleUpdateSettings::UpdateDidRunStateForApp(
407    const AppRegistrationData& app_reg_data,
408    bool did_run) {
409  return WriteGoogleUpdateStrKeyInternal(app_reg_data,
410                                         false, // user level.
411                                         google_update::kRegDidRunField,
412                                         did_run ? L"1" : L"0",
413                                         NULL);
414}
415
416bool GoogleUpdateSettings::UpdateDidRunState(bool did_run, bool system_level) {
417  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
418  bool result = UpdateDidRunStateForApp(dist->GetAppRegistrationData(),
419                                        did_run);
420  // Update state for binaries, even if the previous call was unsuccessful.
421  if (InstallUtil::IsMultiInstall(dist, system_level))
422    result = UpdateDidRunStateForBinaries(did_run) && result;
423  return result;
424}
425
426base::string16 GoogleUpdateSettings::GetChromeChannel(bool system_install) {
427  base::string16 channel;
428  GetChromeChannelInternal(system_install, false, &channel);
429  return channel;
430}
431
432bool GoogleUpdateSettings::GetChromeChannelAndModifiers(
433    bool system_install,
434    base::string16* channel) {
435  return GetChromeChannelInternal(system_install, true, channel);
436}
437
438void GoogleUpdateSettings::UpdateInstallStatus(bool system_install,
439    installer::ArchiveType archive_type, int install_return_code,
440    const base::string16& product_guid) {
441  DCHECK(archive_type != installer::UNKNOWN_ARCHIVE_TYPE ||
442         install_return_code != 0);
443  HKEY reg_root = (system_install) ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
444
445  RegKey key;
446  installer::ChannelInfo channel_info;
447  base::string16 reg_key(google_update::kRegPathClientState);
448  reg_key.append(L"\\");
449  reg_key.append(product_guid);
450  LONG result = key.Open(reg_root,
451                         reg_key.c_str(),
452                         KEY_QUERY_VALUE | KEY_SET_VALUE | KEY_WOW64_32KEY);
453  if (result == ERROR_SUCCESS)
454    channel_info.Initialize(key);
455  else if (result != ERROR_FILE_NOT_FOUND)
456    LOG(ERROR) << "Failed to open " << reg_key << "; Error: " << result;
457
458  if (UpdateGoogleUpdateApKey(archive_type, install_return_code,
459                              &channel_info)) {
460    // We have a modified channel_info value to write.
461    // Create the app's ClientState key if it doesn't already exist.
462    if (!key.Valid()) {
463      result = key.Open(reg_root,
464                        google_update::kRegPathClientState,
465                        KEY_CREATE_SUB_KEY | KEY_WOW64_32KEY);
466      if (result == ERROR_SUCCESS)
467        result = key.CreateKey(product_guid.c_str(),
468                               KEY_SET_VALUE | KEY_WOW64_32KEY);
469
470      if (result != ERROR_SUCCESS) {
471        LOG(ERROR) << "Failed to create " << reg_key << "; Error: " << result;
472        return;
473      }
474    }
475    if (!channel_info.Write(&key)) {
476      LOG(ERROR) << "Failed to write to application's ClientState key "
477                 << google_update::kRegApField << " = " << channel_info.value();
478    }
479  }
480}
481
482bool GoogleUpdateSettings::UpdateGoogleUpdateApKey(
483    installer::ArchiveType archive_type, int install_return_code,
484    installer::ChannelInfo* value) {
485  DCHECK(archive_type != installer::UNKNOWN_ARCHIVE_TYPE ||
486         install_return_code != 0);
487  bool modified = false;
488
489  if (archive_type == installer::FULL_ARCHIVE_TYPE || !install_return_code) {
490    if (value->SetFullSuffix(false)) {
491      VLOG(1) << "Removed incremental installer failure key; "
492                 "switching to channel: "
493              << value->value();
494      modified = true;
495    }
496  } else if (archive_type == installer::INCREMENTAL_ARCHIVE_TYPE) {
497    if (value->SetFullSuffix(true)) {
498      VLOG(1) << "Incremental installer failed; switching to channel: "
499              << value->value();
500      modified = true;
501    } else {
502      VLOG(1) << "Incremental installer failure; already on channel: "
503              << value->value();
504    }
505  } else {
506    // It's okay if we don't know the archive type.  In this case, leave the
507    // "-full" suffix as we found it.
508    DCHECK_EQ(installer::UNKNOWN_ARCHIVE_TYPE, archive_type);
509  }
510
511  if (value->SetMultiFailSuffix(false)) {
512    VLOG(1) << "Removed multi-install failure key; switching to channel: "
513            << value->value();
514    modified = true;
515  }
516
517  return modified;
518}
519
520void GoogleUpdateSettings::UpdateProfileCounts(int profiles_active,
521                                               int profiles_signedin) {
522  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
523  bool system_install = IsSystemInstall();
524  WriteGoogleUpdateStrKeyInternal(dist->GetAppRegistrationData(),
525                                  system_install,
526                                  google_update::kRegProfilesActive,
527                                  base::Int64ToString16(profiles_active),
528                                  L"sum()");
529  WriteGoogleUpdateStrKeyInternal(dist->GetAppRegistrationData(),
530                                  system_install,
531                                  google_update::kRegProfilesSignedIn,
532                                  base::Int64ToString16(profiles_signedin),
533                                  L"sum()");
534}
535
536int GoogleUpdateSettings::DuplicateGoogleUpdateSystemClientKey() {
537  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
538  base::string16 reg_path = dist->GetStateKey();
539
540  // Minimum access needed is to be able to write to this key.
541  RegKey reg_key(
542      HKEY_LOCAL_MACHINE, reg_path.c_str(), KEY_SET_VALUE | KEY_WOW64_32KEY);
543  if (!reg_key.Valid())
544    return 0;
545
546  HANDLE target_handle = 0;
547  if (!DuplicateHandle(GetCurrentProcess(), reg_key.Handle(),
548                       GetCurrentProcess(), &target_handle, KEY_SET_VALUE,
549                       TRUE, DUPLICATE_SAME_ACCESS)) {
550    return 0;
551  }
552  return reinterpret_cast<int>(target_handle);
553}
554
555bool GoogleUpdateSettings::WriteGoogleUpdateSystemClientKey(
556    int handle, const base::string16& key, const base::string16& value) {
557  HKEY reg_key = reinterpret_cast<HKEY>(reinterpret_cast<void*>(handle));
558  DWORD size = static_cast<DWORD>(value.size()) * sizeof(wchar_t);
559  LSTATUS status = RegSetValueEx(reg_key, key.c_str(), 0, REG_SZ,
560      reinterpret_cast<const BYTE*>(value.c_str()), size);
561  return status == ERROR_SUCCESS;
562}
563
564GoogleUpdateSettings::UpdatePolicy GoogleUpdateSettings::GetAppUpdatePolicy(
565    const base::string16& app_guid,
566    bool* is_overridden) {
567  bool found_override = false;
568  UpdatePolicy update_policy = kDefaultUpdatePolicy;
569
570#if defined(GOOGLE_CHROME_BUILD)
571  DCHECK(!app_guid.empty());
572  RegKey policy_key;
573
574  // Google Update Group Policy settings are always in HKLM.
575  // TODO(wfh): Check if policies should go into Wow6432Node or not.
576  if (policy_key.Open(HKEY_LOCAL_MACHINE, kPoliciesKey, KEY_QUERY_VALUE) ==
577          ERROR_SUCCESS) {
578    DWORD value = 0;
579    base::string16 app_update_override(kUpdateOverrideValuePrefix);
580    app_update_override.append(app_guid);
581    // First try to read and comprehend the app-specific override.
582    found_override = (policy_key.ReadValueDW(app_update_override.c_str(),
583                                             &value) == ERROR_SUCCESS &&
584                      GetUpdatePolicyFromDword(value, &update_policy));
585
586    // Failing that, try to read and comprehend the default override.
587    if (!found_override &&
588        policy_key.ReadValueDW(kUpdatePolicyValue, &value) == ERROR_SUCCESS) {
589      GetUpdatePolicyFromDword(value, &update_policy);
590    }
591  }
592#endif  // defined(GOOGLE_CHROME_BUILD)
593
594  if (is_overridden != NULL)
595    *is_overridden = found_override;
596
597  return update_policy;
598}
599
600// static
601bool GoogleUpdateSettings::AreAutoupdatesEnabled(
602    const base::string16& app_guid) {
603  // Check the auto-update check period override. If it is 0 or exceeds the
604  // maximum timeout, then for all intents and purposes auto updates are
605  // disabled.
606  RegKey policy_key;
607  DWORD value = 0;
608  if (policy_key.Open(HKEY_LOCAL_MACHINE, kPoliciesKey,
609                      KEY_QUERY_VALUE) == ERROR_SUCCESS &&
610      policy_key.ReadValueDW(kCheckPeriodOverrideMinutes,
611                             &value) == ERROR_SUCCESS &&
612      (value == 0 || value > kCheckPeriodOverrideMinutesMax)) {
613    return false;
614  }
615
616  UpdatePolicy policy = GetAppUpdatePolicy(app_guid, NULL);
617  return (policy == AUTOMATIC_UPDATES || policy == AUTO_UPDATES_ONLY);
618}
619
620// static
621bool GoogleUpdateSettings::ReenableAutoupdatesForApp(
622    const base::string16& app_guid) {
623#if defined(GOOGLE_CHROME_BUILD)
624  int needs_reset_count = 0;
625  int did_reset_count = 0;
626
627  UpdatePolicy update_policy = kDefaultUpdatePolicy;
628  RegKey policy_key;
629  if (policy_key.Open(HKEY_LOCAL_MACHINE, kPoliciesKey,
630                      KEY_SET_VALUE | KEY_QUERY_VALUE) == ERROR_SUCCESS) {
631    // First check the app-specific override value and reset that if needed.
632    // Note that this intentionally sets the override to AUTOMATIC_UPDATES
633    // even if it was previously AUTO_UPDATES_ONLY. The thinking is that
634    // AUTOMATIC_UPDATES is marginally more likely to let a user update and this
635    // code is only called when a stuck user asks for updates.
636    base::string16 app_update_override(kUpdateOverrideValuePrefix);
637    app_update_override.append(app_guid);
638    DWORD value = 0;
639    bool has_app_update_override =
640        policy_key.ReadValueDW(app_update_override.c_str(),
641                               &value) == ERROR_SUCCESS;
642    if (has_app_update_override &&
643        (!GetUpdatePolicyFromDword(value, &update_policy) ||
644         update_policy != GoogleUpdateSettings::AUTOMATIC_UPDATES)) {
645      ++needs_reset_count;
646      if (policy_key.WriteValue(
647              app_update_override.c_str(),
648              static_cast<DWORD>(GoogleUpdateSettings::AUTOMATIC_UPDATES)) ==
649                  ERROR_SUCCESS) {
650        ++did_reset_count;
651      }
652    }
653
654    // If there was no app-specific override policy see if there's a global
655    // policy preventing updates and delete it if so.
656    if (!has_app_update_override &&
657        policy_key.ReadValueDW(kUpdatePolicyValue, &value) == ERROR_SUCCESS &&
658        (!GetUpdatePolicyFromDword(value, &update_policy) ||
659         update_policy != GoogleUpdateSettings::AUTOMATIC_UPDATES)) {
660      ++needs_reset_count;
661      if (policy_key.DeleteValue(kUpdatePolicyValue) == ERROR_SUCCESS)
662        ++did_reset_count;
663    }
664
665    // Check the auto-update check period override. If it is 0 or exceeds
666    // the maximum timeout, delete the override value.
667    if (policy_key.ReadValueDW(kCheckPeriodOverrideMinutes,
668                               &value) == ERROR_SUCCESS &&
669        (value == 0 || value > kCheckPeriodOverrideMinutesMax)) {
670      ++needs_reset_count;
671      if (policy_key.DeleteValue(kCheckPeriodOverrideMinutes) == ERROR_SUCCESS)
672        ++did_reset_count;
673    }
674
675    // Return whether the number of successful resets is the same as the
676    // number of things that appeared to need resetting.
677    return (needs_reset_count == did_reset_count);
678  } else {
679    // For some reason we couldn't open the policy key with the desired
680    // permissions to make changes (the most likely reason is that there is no
681    // policy set). Simply return whether or not we think updates are enabled.
682    return AreAutoupdatesEnabled(app_guid);
683  }
684
685#endif
686  // Non Google Chrome isn't going to autoupdate.
687  return true;
688}
689
690void GoogleUpdateSettings::RecordChromeUpdatePolicyHistograms() {
691  const bool is_multi_install = InstallUtil::IsMultiInstall(
692      BrowserDistribution::GetDistribution(), IsSystemInstall());
693  const base::string16 app_guid =
694      BrowserDistribution::GetSpecificDistribution(
695          is_multi_install ? BrowserDistribution::CHROME_BINARIES :
696                             BrowserDistribution::CHROME_BROWSER)->GetAppGuid();
697
698  bool is_overridden = false;
699  const UpdatePolicy update_policy = GetAppUpdatePolicy(app_guid,
700                                                        &is_overridden);
701  UMA_HISTOGRAM_BOOLEAN("GoogleUpdate.UpdatePolicyIsOverridden", is_overridden);
702  UMA_HISTOGRAM_ENUMERATION("GoogleUpdate.EffectivePolicy", update_policy,
703                            UPDATE_POLICIES_COUNT);
704}
705
706base::string16 GoogleUpdateSettings::GetUninstallCommandLine(
707    bool system_install) {
708  const HKEY root_key = system_install ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
709  base::string16 cmd_line;
710  RegKey update_key;
711
712  if (update_key.Open(root_key, google_update::kRegPathGoogleUpdate,
713                      KEY_QUERY_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS) {
714    update_key.ReadValue(google_update::kRegUninstallCmdLine, &cmd_line);
715  }
716
717  return cmd_line;
718}
719
720Version GoogleUpdateSettings::GetGoogleUpdateVersion(bool system_install) {
721  const HKEY root_key = system_install ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
722  base::string16 version;
723  RegKey key;
724
725  if (key.Open(root_key,
726               google_update::kRegPathGoogleUpdate,
727               KEY_QUERY_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS &&
728      key.ReadValue(google_update::kRegGoogleUpdateVersion, &version) ==
729          ERROR_SUCCESS) {
730    return Version(base::UTF16ToUTF8(version));
731  }
732
733  return Version();
734}
735
736base::Time GoogleUpdateSettings::GetGoogleUpdateLastStartedAU(
737    bool system_install) {
738  const HKEY root_key = system_install ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
739  RegKey update_key;
740
741  if (update_key.Open(root_key,
742                      google_update::kRegPathGoogleUpdate,
743                      KEY_QUERY_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS) {
744    DWORD last_start;
745    if (update_key.ReadValueDW(google_update::kRegLastStartedAUField,
746                               &last_start) == ERROR_SUCCESS) {
747      return base::Time::FromTimeT(last_start);
748    }
749  }
750
751  return base::Time();
752}
753
754base::Time GoogleUpdateSettings::GetGoogleUpdateLastChecked(
755    bool system_install) {
756  const HKEY root_key = system_install ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
757  RegKey update_key;
758
759  if (update_key.Open(root_key,
760                      google_update::kRegPathGoogleUpdate,
761                      KEY_QUERY_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS) {
762    DWORD last_check;
763    if (update_key.ReadValueDW(google_update::kRegLastCheckedField,
764                               &last_check) == ERROR_SUCCESS) {
765      return base::Time::FromTimeT(last_check);
766    }
767  }
768
769  return base::Time();
770}
771
772bool GoogleUpdateSettings::GetUpdateDetailForApp(bool system_install,
773                                                 const wchar_t* app_guid,
774                                                 ProductData* data) {
775  DCHECK(app_guid);
776  DCHECK(data);
777
778  bool product_found = false;
779
780  const HKEY root_key = system_install ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
781  base::string16 clientstate_reg_path(google_update::kRegPathClientState);
782  clientstate_reg_path.append(L"\\");
783  clientstate_reg_path.append(app_guid);
784
785  RegKey clientstate;
786  if (clientstate.Open(root_key,
787                       clientstate_reg_path.c_str(),
788                       KEY_QUERY_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS) {
789    base::string16 version;
790    DWORD dword_value;
791    if ((clientstate.ReadValueDW(google_update::kRegLastCheckSuccessField,
792                                 &dword_value) == ERROR_SUCCESS) &&
793        (clientstate.ReadValue(google_update::kRegVersionField,
794                               &version) == ERROR_SUCCESS)) {
795      product_found = true;
796      data->version = base::UTF16ToASCII(version);
797      data->last_success = base::Time::FromTimeT(dword_value);
798      data->last_result = 0;
799      data->last_error_code = 0;
800      data->last_extra_code = 0;
801
802      if (clientstate.ReadValueDW(google_update::kRegLastInstallerResultField,
803                                  &dword_value) == ERROR_SUCCESS) {
804        // Google Update convention is that if an installer writes an result
805        // code that is invalid, it is clamped to an exit code result.
806        const DWORD kMaxValidInstallResult = 4;  // INSTALLER_RESULT_EXIT_CODE
807        data->last_result = std::min(dword_value, kMaxValidInstallResult);
808      }
809      if (clientstate.ReadValueDW(google_update::kRegLastInstallerErrorField,
810                                  &dword_value) == ERROR_SUCCESS) {
811        data->last_error_code = dword_value;
812      }
813      if (clientstate.ReadValueDW(google_update::kRegLastInstallerExtraField,
814                                  &dword_value) == ERROR_SUCCESS) {
815        data->last_extra_code = dword_value;
816      }
817    }
818  }
819
820  return product_found;
821}
822
823bool GoogleUpdateSettings::GetUpdateDetailForGoogleUpdate(bool system_install,
824                                                          ProductData* data) {
825  return GetUpdateDetailForApp(system_install,
826                               google_update::kGoogleUpdateUpgradeCode,
827                               data);
828}
829
830bool GoogleUpdateSettings::GetUpdateDetail(bool system_install,
831                                           ProductData* data) {
832  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
833  return GetUpdateDetailForApp(system_install,
834                               dist->GetAppGuid().c_str(),
835                               data);
836}
837
838bool GoogleUpdateSettings::SetExperimentLabels(
839    bool system_install,
840    const base::string16& experiment_labels) {
841  HKEY reg_root = system_install ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
842
843  // Use the browser distribution and install level to write to the correct
844  // client state/app guid key.
845  bool success = false;
846  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
847  if (dist->ShouldSetExperimentLabels()) {
848    base::string16 client_state_path(
849        system_install ? dist->GetStateMediumKey() : dist->GetStateKey());
850    RegKey client_state(
851        reg_root, client_state_path.c_str(), KEY_SET_VALUE | KEY_WOW64_32KEY);
852    if (experiment_labels.empty()) {
853      success = client_state.DeleteValue(google_update::kExperimentLabels)
854          == ERROR_SUCCESS;
855    } else {
856      success = client_state.WriteValue(google_update::kExperimentLabels,
857          experiment_labels.c_str()) == ERROR_SUCCESS;
858    }
859  }
860
861  return success;
862}
863
864bool GoogleUpdateSettings::ReadExperimentLabels(
865    bool system_install,
866    base::string16* experiment_labels) {
867  HKEY reg_root = system_install ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
868
869  // If this distribution does not set the experiment labels, don't bother
870  // reading.
871  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
872  if (!dist->ShouldSetExperimentLabels())
873    return false;
874
875  base::string16 client_state_path(
876      system_install ? dist->GetStateMediumKey() : dist->GetStateKey());
877
878  RegKey client_state;
879  LONG result = client_state.Open(
880      reg_root, client_state_path.c_str(), KEY_QUERY_VALUE | KEY_WOW64_32KEY);
881  if (result == ERROR_SUCCESS) {
882    result = client_state.ReadValue(google_update::kExperimentLabels,
883                                    experiment_labels);
884  }
885
886  // If the key or value was not present, return the empty string.
887  if (result == ERROR_FILE_NOT_FOUND || result == ERROR_PATH_NOT_FOUND) {
888    experiment_labels->clear();
889    return true;
890  }
891
892  return result == ERROR_SUCCESS;
893}
894