chrome/browser/media/media_stream_device_permissions.cc

   1 // Copyright 2014 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/media/media_stream_device_permissions.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/prefs/pref_service.h"
   9 #include "base/values.h"
  10 #include "chrome/browser/profiles/profile.h"
  11 #include "chrome/common/chrome_switches.h"
  12 #include "components/content_settings/core/browser/host_content_settings_map.h"
  13 #include "components/content_settings/core/common/content_settings_pattern.h"
  14 #include "content/public/browser/browser_thread.h"
  15 #include "url/gurl.h"
  16
  17 #if defined(OS_CHROMEOS)
  18 #include "components/user_manager/user_manager.h"
  19 #endif
  20
  21 namespace {
  22
  23 bool IsInKioskMode() {
  24   if (base::CommandLine::ForCurrentProcess()->HasSwitch(switches::kKioskMode))
  25     return true;
  26
  27 #if defined(OS_CHROMEOS)
  28   const user_manager::UserManager* user_manager =
  29       user_manager::UserManager::Get();
  30   return user_manager && user_manager->IsLoggedInAsKioskApp();
  31 #else
  32   return false;
  33 #endif
  34 }
  35
  36 }  // namespace
  37
  38 bool CheckAllowAllMediaStreamContentForOrigin(Profile* profile,
  39                                               const GURL& security_origin) {
  40   // TODO(markusheintz): Replace CONTENT_SETTINGS_TYPE_MEDIA_STREAM with the
  41   // appropriate new CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC and
  42   // CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA.
  43   return profile->GetHostContentSettingsMap()->ShouldAllowAllContent(
  44       security_origin, security_origin, CONTENT_SETTINGS_TYPE_MEDIASTREAM);
  45 }
  46
  47 MediaStreamDevicePolicy GetDevicePolicy(Profile* profile,
  48                                         const GURL& security_origin,
  49                                         const char* policy_name,
  50                                         const char* whitelist_policy_name) {
  51   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  52
  53   // If the security origin policy matches a value in the whitelist, allow it.
  54   // Otherwise, check the |policy_name| master switch for the default behavior.
  55
  56   PrefService* prefs = profile->GetPrefs();
  57
  58   // TODO(tommi): Remove the kiosk mode check when the whitelist below
  59   // is visible in the media exceptions UI.
  60   // See discussion here: https://codereview.chromium.org/15738004/
  61   if (IsInKioskMode()) {
  62     const base::ListValue* list = prefs->GetList(whitelist_policy_name);
  63     std::string value;
  64     for (size_t i = 0; i < list->GetSize(); ++i) {
  65       if (list->GetString(i, &value)) {
  66         ContentSettingsPattern pattern =
  67             ContentSettingsPattern::FromString(value);
  68         if (pattern == ContentSettingsPattern::Wildcard()) {
  69           DLOG(WARNING) << "Ignoring wildcard URL pattern: " << value;
  70           continue;
  71         }
  72         DLOG_IF(ERROR, !pattern.IsValid()) << "Invalid URL pattern: " << value;
  73         if (pattern.IsValid() && pattern.Matches(security_origin))
  74           return ALWAYS_ALLOW;
  75       }
  76     }
  77   }
  78
  79   // If a match was not found, check if audio capture is otherwise disallowed
  80   // or if the user should be prompted.  Setting the policy value to "true"
  81   // is equal to not setting it at all, so from hereon out, we will return
  82   // either POLICY_NOT_SET (prompt) or ALWAYS_DENY (no prompt, no access).
  83   if (!prefs->GetBoolean(policy_name))
  84     return ALWAYS_DENY;
  85
  86   return POLICY_NOT_SET;
  87 }