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      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/content_settings/host_content_settings_map.h"
     11 #include "chrome/browser/profiles/profile.h"
     12 #include "chrome/common/chrome_switches.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 }
     88