content_settings_policy_provider.cc revision 7dbb3d5cf0c15f500944d211057644d6a2f37371 
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/browser/content_settings/content_settings_policy_provider.h"
6
7#include <string>
8#include <vector>
9
10#include "base/json/json_reader.h"
11#include "base/prefs/pref_service.h"
12#include "base/values.h"
13#include "chrome/browser/chrome_notification_types.h"
14#include "chrome/browser/content_settings/content_settings_rule.h"
15#include "chrome/browser/content_settings/content_settings_utils.h"
16#include "chrome/common/content_settings_pattern.h"
17#include "chrome/common/pref_names.h"
18#include "components/user_prefs/pref_registry_syncable.h"
19#include "content/public/browser/browser_thread.h"
20#include "content/public/browser/notification_details.h"
21#include "content/public/browser/notification_source.h"
22
23using content::BrowserThread;
24
25namespace {
26
27// The preferences used to manage ContentSettingsTypes.
28const char* kPrefToManageType[] = {
29  prefs::kManagedDefaultCookiesSetting,
30  prefs::kManagedDefaultImagesSetting,
31  prefs::kManagedDefaultJavaScriptSetting,
32  prefs::kManagedDefaultPluginsSetting,
33  prefs::kManagedDefaultPopupsSetting,
34  prefs::kManagedDefaultGeolocationSetting,
35  prefs::kManagedDefaultNotificationsSetting,
36  NULL,  // No policy for default value of content type auto-select-certificate
37  NULL,  // No policy for default value of fullscreen requests
38  NULL,  // No policy for default value of mouse lock requests
39  NULL,  // No policy for default value of mixed script blocking
40  prefs::kManagedDefaultMediaStreamSetting,
41  NULL,  // No policy for default value of media stream mic
42  NULL,  // No policy for default value of media stream camera
43  NULL,  // No policy for default value of protocol handlers
44  NULL,  // No policy for default value of PPAPI broker
45  NULL,  // No policy for default value of multiple automatic downloads
46#if defined(OS_WIN)
47  NULL,  // No policy for default value of "switch to desktop"
48#endif
49};
50COMPILE_ASSERT(arraysize(kPrefToManageType) == CONTENT_SETTINGS_NUM_TYPES,
51               managed_content_settings_pref_names_array_size_incorrect);
52
53struct PrefsForManagedContentSettingsMapEntry {
54  const char* pref_name;
55  ContentSettingsType content_type;
56  ContentSetting setting;
57};
58
59const PrefsForManagedContentSettingsMapEntry
60    kPrefsForManagedContentSettingsMap[] = {
61  {
62    prefs::kManagedCookiesAllowedForUrls,
63    CONTENT_SETTINGS_TYPE_COOKIES,
64    CONTENT_SETTING_ALLOW
65  }, {
66    prefs::kManagedCookiesSessionOnlyForUrls,
67    CONTENT_SETTINGS_TYPE_COOKIES,
68    CONTENT_SETTING_SESSION_ONLY
69  }, {
70    prefs::kManagedCookiesBlockedForUrls,
71    CONTENT_SETTINGS_TYPE_COOKIES,
72    CONTENT_SETTING_BLOCK
73  }, {
74    prefs::kManagedImagesAllowedForUrls,
75    CONTENT_SETTINGS_TYPE_IMAGES,
76    CONTENT_SETTING_ALLOW
77  }, {
78    prefs::kManagedImagesBlockedForUrls,
79    CONTENT_SETTINGS_TYPE_IMAGES,
80    CONTENT_SETTING_BLOCK
81  }, {
82    prefs::kManagedJavaScriptAllowedForUrls,
83    CONTENT_SETTINGS_TYPE_JAVASCRIPT,
84    CONTENT_SETTING_ALLOW
85  }, {
86    prefs::kManagedJavaScriptBlockedForUrls,
87    CONTENT_SETTINGS_TYPE_JAVASCRIPT,
88    CONTENT_SETTING_BLOCK
89  }, {
90    prefs::kManagedPluginsAllowedForUrls,
91    CONTENT_SETTINGS_TYPE_PLUGINS,
92    CONTENT_SETTING_ALLOW
93  }, {
94    prefs::kManagedPluginsBlockedForUrls,
95    CONTENT_SETTINGS_TYPE_PLUGINS,
96    CONTENT_SETTING_BLOCK
97  }, {
98    prefs::kManagedPopupsAllowedForUrls,
99    CONTENT_SETTINGS_TYPE_POPUPS,
100    CONTENT_SETTING_ALLOW
101  }, {
102    prefs::kManagedPopupsBlockedForUrls,
103    CONTENT_SETTINGS_TYPE_POPUPS,
104    CONTENT_SETTING_BLOCK
105  }, {
106    prefs::kManagedNotificationsAllowedForUrls,
107    CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
108    CONTENT_SETTING_ALLOW
109  }, {
110    prefs::kManagedNotificationsBlockedForUrls,
111    CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
112    CONTENT_SETTING_BLOCK
113  }
114};
115
116}  // namespace
117
118namespace content_settings {
119
120// static
121void PolicyProvider::RegisterProfilePrefs(
122    user_prefs::PrefRegistrySyncable* registry) {
123  registry->RegisterListPref(prefs::kManagedAutoSelectCertificateForUrls,
124                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
125  registry->RegisterListPref(prefs::kManagedCookiesAllowedForUrls,
126                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
127  registry->RegisterListPref(prefs::kManagedCookiesBlockedForUrls,
128                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
129  registry->RegisterListPref(prefs::kManagedCookiesSessionOnlyForUrls,
130                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
131  registry->RegisterListPref(prefs::kManagedImagesAllowedForUrls,
132                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
133  registry->RegisterListPref(prefs::kManagedImagesBlockedForUrls,
134                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
135  registry->RegisterListPref(prefs::kManagedJavaScriptAllowedForUrls,
136                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
137  registry->RegisterListPref(prefs::kManagedJavaScriptBlockedForUrls,
138                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
139  registry->RegisterListPref(prefs::kManagedPluginsAllowedForUrls,
140                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
141  registry->RegisterListPref(prefs::kManagedPluginsBlockedForUrls,
142                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
143  registry->RegisterListPref(prefs::kManagedPopupsAllowedForUrls,
144                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
145  registry->RegisterListPref(prefs::kManagedPopupsBlockedForUrls,
146                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
147  registry->RegisterListPref(prefs::kManagedNotificationsAllowedForUrls,
148                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
149  registry->RegisterListPref(prefs::kManagedNotificationsBlockedForUrls,
150                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
151  // Preferences for default content setting policies. If a policy is not set of
152  // the corresponding preferences below is set to CONTENT_SETTING_DEFAULT.
153  registry->RegisterIntegerPref(
154      prefs::kManagedDefaultCookiesSetting,
155      CONTENT_SETTING_DEFAULT,
156      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
157  registry->RegisterIntegerPref(
158      prefs::kManagedDefaultImagesSetting,
159      CONTENT_SETTING_DEFAULT,
160      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
161  registry->RegisterIntegerPref(
162      prefs::kManagedDefaultJavaScriptSetting,
163      CONTENT_SETTING_DEFAULT,
164      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
165  registry->RegisterIntegerPref(
166      prefs::kManagedDefaultPluginsSetting,
167      CONTENT_SETTING_DEFAULT,
168      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
169  registry->RegisterIntegerPref(
170      prefs::kManagedDefaultPopupsSetting,
171      CONTENT_SETTING_DEFAULT,
172      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
173  registry->RegisterIntegerPref(
174      prefs::kManagedDefaultGeolocationSetting,
175      CONTENT_SETTING_DEFAULT,
176      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
177  registry->RegisterIntegerPref(
178      prefs::kManagedDefaultNotificationsSetting,
179      CONTENT_SETTING_DEFAULT,
180      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
181  registry->RegisterIntegerPref(
182      prefs::kManagedDefaultMediaStreamSetting,
183      CONTENT_SETTING_DEFAULT,
184      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
185}
186
187PolicyProvider::PolicyProvider(PrefService* prefs) : prefs_(prefs) {
188  ReadManagedDefaultSettings();
189  ReadManagedContentSettings(false);
190
191  pref_change_registrar_.Init(prefs_);
192  PrefChangeRegistrar::NamedChangeCallback callback =
193      base::Bind(&PolicyProvider::OnPreferenceChanged, base::Unretained(this));
194  pref_change_registrar_.Add(
195      prefs::kManagedAutoSelectCertificateForUrls, callback);
196  pref_change_registrar_.Add(prefs::kManagedCookiesBlockedForUrls, callback);
197  pref_change_registrar_.Add(prefs::kManagedCookiesAllowedForUrls, callback);
198  pref_change_registrar_.Add(
199      prefs::kManagedCookiesSessionOnlyForUrls, callback);
200  pref_change_registrar_.Add(prefs::kManagedImagesBlockedForUrls, callback);
201  pref_change_registrar_.Add(prefs::kManagedImagesAllowedForUrls, callback);
202  pref_change_registrar_.Add(prefs::kManagedJavaScriptBlockedForUrls, callback);
203  pref_change_registrar_.Add(prefs::kManagedJavaScriptAllowedForUrls, callback);
204  pref_change_registrar_.Add(prefs::kManagedPluginsBlockedForUrls, callback);
205  pref_change_registrar_.Add(prefs::kManagedPluginsAllowedForUrls, callback);
206  pref_change_registrar_.Add(prefs::kManagedPopupsBlockedForUrls, callback);
207  pref_change_registrar_.Add(prefs::kManagedPopupsAllowedForUrls, callback);
208  pref_change_registrar_.Add(
209      prefs::kManagedNotificationsAllowedForUrls, callback);
210  pref_change_registrar_.Add(
211      prefs::kManagedNotificationsBlockedForUrls, callback);
212  // The following preferences are only used to indicate if a
213  // default content setting is managed and to hold the managed default setting
214  // value. If the value for any of the following perferences is set then the
215  // corresponding default content setting is managed. These preferences exist
216  // in parallel to the preference default content settings.  If a
217  // default content settings type is managed any user defined excpetions
218  // (patterns) for this type are ignored.
219  pref_change_registrar_.Add(prefs::kManagedDefaultCookiesSetting, callback);
220  pref_change_registrar_.Add(prefs::kManagedDefaultImagesSetting, callback);
221  pref_change_registrar_.Add(prefs::kManagedDefaultJavaScriptSetting, callback);
222  pref_change_registrar_.Add(prefs::kManagedDefaultPluginsSetting, callback);
223  pref_change_registrar_.Add(prefs::kManagedDefaultPopupsSetting, callback);
224  pref_change_registrar_.Add(
225      prefs::kManagedDefaultGeolocationSetting, callback);
226  pref_change_registrar_.Add(
227      prefs::kManagedDefaultNotificationsSetting, callback);
228  pref_change_registrar_.Add(
229      prefs::kManagedDefaultMediaStreamSetting, callback);
230}
231
232PolicyProvider::~PolicyProvider() {
233  DCHECK(!prefs_);
234}
235
236RuleIterator* PolicyProvider::GetRuleIterator(
237    ContentSettingsType content_type,
238    const ResourceIdentifier& resource_identifier,
239    bool incognito) const {
240  return value_map_.GetRuleIterator(content_type, resource_identifier, &lock_);
241}
242
243void PolicyProvider::GetContentSettingsFromPreferences(
244    OriginIdentifierValueMap* value_map) {
245  for (size_t i = 0; i < arraysize(kPrefsForManagedContentSettingsMap); ++i) {
246    const char* pref_name = kPrefsForManagedContentSettingsMap[i].pref_name;
247    // Skip unset policies.
248    if (!prefs_->HasPrefPath(pref_name)) {
249      VLOG(2) << "Skipping unset preference: " << pref_name;
250      continue;
251    }
252
253    const PrefService::Preference* pref = prefs_->FindPreference(pref_name);
254    DCHECK(pref);
255    DCHECK(pref->IsManaged());
256
257    const base::ListValue* pattern_str_list = NULL;
258    if (!pref->GetValue()->GetAsList(&pattern_str_list)) {
259      NOTREACHED();
260      return;
261    }
262
263    for (size_t j = 0; j < pattern_str_list->GetSize(); ++j) {
264      std::string original_pattern_str;
265      if (!pattern_str_list->GetString(j, &original_pattern_str)) {
266        NOTREACHED();
267        continue;
268      }
269
270      PatternPair pattern_pair = ParsePatternString(original_pattern_str);
271      // Ignore invalid patterns.
272      if (!pattern_pair.first.IsValid()) {
273        VLOG(1) << "Ignoring invalid content settings pattern: " <<
274                   original_pattern_str;
275        continue;
276      }
277
278      ContentSettingsType content_type =
279          kPrefsForManagedContentSettingsMap[i].content_type;
280      DCHECK_NE(content_type, CONTENT_SETTINGS_TYPE_AUTO_SELECT_CERTIFICATE);
281      // If only one pattern was defined auto expand it to a pattern pair.
282      ContentSettingsPattern secondary_pattern =
283          !pattern_pair.second.IsValid() ? ContentSettingsPattern::Wildcard()
284                                         : pattern_pair.second;
285      value_map->SetValue(
286          pattern_pair.first,
287          secondary_pattern,
288          content_type,
289          NO_RESOURCE_IDENTIFIER,
290          base::Value::CreateIntegerValue(
291              kPrefsForManagedContentSettingsMap[i].setting));
292    }
293  }
294}
295
296void PolicyProvider::GetAutoSelectCertificateSettingsFromPreferences(
297    OriginIdentifierValueMap* value_map) {
298  const char* pref_name = prefs::kManagedAutoSelectCertificateForUrls;
299
300  if (!prefs_->HasPrefPath(pref_name)) {
301    VLOG(2) << "Skipping unset preference: " << pref_name;
302    return;
303  }
304
305  const PrefService::Preference* pref = prefs_->FindPreference(pref_name);
306  DCHECK(pref);
307  DCHECK(pref->IsManaged());
308
309  const base::ListValue* pattern_filter_str_list = NULL;
310  if (!pref->GetValue()->GetAsList(&pattern_filter_str_list)) {
311    NOTREACHED();
312    return;
313  }
314
315  // Parse the list of pattern filter strings. A pattern filter string has
316  // the following JSON format:
317  //
318  // {
319  //   "pattern": <content settings pattern string>,
320  //   "filter" : <certificate filter in JSON format>
321  // }
322  //
323  // e.g.
324  // {
325  //   "pattern": "[*.]example.com",
326  //   "filter": {
327  //      "ISSUER": {
328  //        "CN": "some name"
329  //      }
330  //   }
331  // }
332  for (size_t j = 0; j < pattern_filter_str_list->GetSize(); ++j) {
333    std::string pattern_filter_json;
334    if (!pattern_filter_str_list->GetString(j, &pattern_filter_json)) {
335      NOTREACHED();
336      continue;
337    }
338
339    scoped_ptr<base::Value> value(base::JSONReader::Read(pattern_filter_json,
340        base::JSON_ALLOW_TRAILING_COMMAS));
341    if (!value || !value->IsType(base::Value::TYPE_DICTIONARY)) {
342      VLOG(1) << "Ignoring invalid certificate auto select setting. Reason:"
343                 " Invalid JSON object: " << pattern_filter_json;
344      continue;
345    }
346
347    scoped_ptr<base::DictionaryValue> pattern_filter_pair(
348        static_cast<base::DictionaryValue*>(value.release()));
349    std::string pattern_str;
350    bool pattern_read = pattern_filter_pair->GetString("pattern", &pattern_str);
351    base::Value* cert_filter_ptr = NULL;
352    bool filter_read = pattern_filter_pair->Remove("filter", &cert_filter_ptr);
353    scoped_ptr<base::Value> cert_filter(cert_filter_ptr);
354    if (!pattern_read || !filter_read ||
355        !cert_filter->IsType(base::Value::TYPE_DICTIONARY)) {
356      VLOG(1) << "Ignoring invalid certificate auto select setting. Reason:"
357                 " Missing pattern or filter.";
358      continue;
359    }
360
361    ContentSettingsPattern pattern =
362        ContentSettingsPattern::FromString(pattern_str);
363    // Ignore invalid patterns.
364    if (!pattern.IsValid()) {
365      VLOG(1) << "Ignoring invalid certificate auto select setting:"
366                 " Invalid content settings pattern: " << pattern;
367      continue;
368    }
369
370    value_map->SetValue(pattern,
371                        ContentSettingsPattern::Wildcard(),
372                        CONTENT_SETTINGS_TYPE_AUTO_SELECT_CERTIFICATE,
373                        std::string(),
374                        cert_filter.release());
375  }
376}
377
378void PolicyProvider::ReadManagedDefaultSettings() {
379  for (size_t type = 0; type < arraysize(kPrefToManageType); ++type) {
380    if (kPrefToManageType[type] == NULL) {
381      continue;
382    }
383    UpdateManagedDefaultSetting(ContentSettingsType(type));
384  }
385}
386
387void PolicyProvider::UpdateManagedDefaultSetting(
388    ContentSettingsType content_type) {
389  // If a pref to manage a default-content-setting was not set (NOTICE:
390  // "HasPrefPath" returns false if no value was set for a registered pref) then
391  // the default value of the preference is used. The default value of a
392  // preference to manage a default-content-settings is CONTENT_SETTING_DEFAULT.
393  // This indicates that no managed value is set. If a pref was set, than it
394  // MUST be managed.
395  DCHECK(!prefs_->HasPrefPath(kPrefToManageType[content_type]) ||
396          prefs_->IsManagedPreference(kPrefToManageType[content_type]));
397  base::AutoLock auto_lock(lock_);
398
399  int setting = prefs_->GetInteger(kPrefToManageType[content_type]);
400  if (setting == CONTENT_SETTING_DEFAULT) {
401    value_map_.DeleteValue(
402        ContentSettingsPattern::Wildcard(),
403        ContentSettingsPattern::Wildcard(),
404        content_type,
405        std::string());
406  } else {
407    value_map_.SetValue(
408        ContentSettingsPattern::Wildcard(),
409        ContentSettingsPattern::Wildcard(),
410        content_type,
411        std::string(),
412        Value::CreateIntegerValue(setting));
413  }
414}
415
416
417void PolicyProvider::ReadManagedContentSettings(bool overwrite) {
418  base::AutoLock auto_lock(lock_);
419  if (overwrite)
420    value_map_.clear();
421  GetContentSettingsFromPreferences(&value_map_);
422  GetAutoSelectCertificateSettingsFromPreferences(&value_map_);
423}
424
425// Since the PolicyProvider is a read only content settings provider, all
426// methodes of the ProviderInterface that set or delete any settings do nothing.
427bool PolicyProvider::SetWebsiteSetting(
428    const ContentSettingsPattern& primary_pattern,
429    const ContentSettingsPattern& secondary_pattern,
430    ContentSettingsType content_type,
431    const ResourceIdentifier& resource_identifier,
432    Value* value) {
433  return false;
434}
435
436void PolicyProvider::ClearAllContentSettingsRules(
437    ContentSettingsType content_type) {
438}
439
440void PolicyProvider::ShutdownOnUIThread() {
441  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
442  RemoveAllObservers();
443  if (!prefs_)
444    return;
445  pref_change_registrar_.RemoveAll();
446  prefs_ = NULL;
447}
448
449void PolicyProvider::OnPreferenceChanged(const std::string& name) {
450  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
451
452  if (name == prefs::kManagedDefaultCookiesSetting) {
453    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_COOKIES);
454  } else if (name == prefs::kManagedDefaultImagesSetting) {
455    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_IMAGES);
456  } else if (name == prefs::kManagedDefaultJavaScriptSetting) {
457    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_JAVASCRIPT);
458  } else if (name == prefs::kManagedDefaultPluginsSetting) {
459    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_PLUGINS);
460  } else if (name == prefs::kManagedDefaultPopupsSetting) {
461    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_POPUPS);
462  } else if (name == prefs::kManagedDefaultGeolocationSetting) {
463    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_GEOLOCATION);
464  } else if (name == prefs::kManagedDefaultNotificationsSetting) {
465    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_NOTIFICATIONS);
466  } else if (name == prefs::kManagedDefaultMediaStreamSetting) {
467    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_MEDIASTREAM);
468  } else if (name == prefs::kManagedAutoSelectCertificateForUrls ||
469             name == prefs::kManagedCookiesAllowedForUrls ||
470             name == prefs::kManagedCookiesBlockedForUrls ||
471             name == prefs::kManagedCookiesSessionOnlyForUrls ||
472             name == prefs::kManagedImagesAllowedForUrls ||
473             name == prefs::kManagedImagesBlockedForUrls ||
474             name == prefs::kManagedJavaScriptAllowedForUrls ||
475             name == prefs::kManagedJavaScriptBlockedForUrls ||
476             name == prefs::kManagedPluginsAllowedForUrls ||
477             name == prefs::kManagedPluginsBlockedForUrls ||
478             name == prefs::kManagedPopupsAllowedForUrls ||
479             name == prefs::kManagedPopupsBlockedForUrls ||
480             name == prefs::kManagedNotificationsAllowedForUrls ||
481             name == prefs::kManagedNotificationsBlockedForUrls) {
482    ReadManagedContentSettings(true);
483    ReadManagedDefaultSettings();
484  }
485
486  NotifyObservers(ContentSettingsPattern(),
487                  ContentSettingsPattern(),
488                  CONTENT_SETTINGS_TYPE_DEFAULT,
489                  std::string());
490}
491
492}  // namespace content_settings
493