The Tor Browser / file revision

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 // See also: docshell/base/nsAboutRedirector.cpp

 #include "AboutRedirector.h"

 #include "nsNetUtil.h"

 #include "nsIScriptSecurityManager.h"

 #include "mozilla/ArrayUtils.h"

 namespace mozilla {

 namespace browser {

 NS_IMPL_ISUPPORTS(AboutRedirector, nsIAboutModule)

 struct RedirEntry {

   const char* id;

   const char* url;

   uint32_t flags;

 };

 /*

   Entries which do not have URI_SAFE_FOR_UNTRUSTED_CONTENT will run with chrome

   privileges. This is potentially dangerous. Please use

   URI_SAFE_FOR_UNTRUSTED_CONTENT in the third argument to each map item below

   unless your about: page really needs chrome privileges. Security review is

   required before adding new map entries without

   URI_SAFE_FOR_UNTRUSTED_CONTENT.  Also note, however, that adding

   URI_SAFE_FOR_UNTRUSTED_CONTENT will allow random web sites to link to that

   URI.  Perhaps we should separate the two concepts out...

  */

 static RedirEntry kRedirMap[] = {

 #ifdef MOZ_SAFE_BROWSING

   { "blocked", "chrome://browser/content/blockedSite.xhtml",

     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |

     nsIAboutModule::ALLOW_SCRIPT |

     nsIAboutModule::HIDE_FROM_ABOUTABOUT },

 #endif

   { "certerror", "chrome://browser/content/certerror/aboutCertError.xhtml",

     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |

     nsIAboutModule::ALLOW_SCRIPT |

     nsIAboutModule::HIDE_FROM_ABOUTABOUT },

   { "socialerror", "chrome://browser/content/aboutSocialError.xhtml",

     nsIAboutModule::ALLOW_SCRIPT |

     nsIAboutModule::HIDE_FROM_ABOUTABOUT },

   { "tabcrashed", "chrome://browser/content/aboutTabCrashed.xhtml",

     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |

     nsIAboutModule::ALLOW_SCRIPT |

     nsIAboutModule::HIDE_FROM_ABOUTABOUT },

   { "feeds", "chrome://browser/content/feeds/subscribe.xhtml",

     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |

     nsIAboutModule::ALLOW_SCRIPT |

     nsIAboutModule::HIDE_FROM_ABOUTABOUT },

   { "privatebrowsing", "chrome://browser/content/aboutPrivateBrowsing.xhtml",

     nsIAboutModule::ALLOW_SCRIPT },

   { "rights",

 #ifdef MOZ_OFFICIAL_BRANDING

     "chrome://global/content/aboutRights.xhtml",

 #else

     "chrome://global/content/aboutRights-unbranded.xhtml",

 #endif

     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |

     nsIAboutModule::ALLOW_SCRIPT },

   { "robots", "chrome://browser/content/aboutRobots.xhtml",

     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |

     nsIAboutModule::ALLOW_SCRIPT },

   { "sessionrestore", "chrome://browser/content/aboutSessionRestore.xhtml",

     nsIAboutModule::ALLOW_SCRIPT },

   { "welcomeback", "chrome://browser/content/aboutWelcomeBack.xhtml",

     nsIAboutModule::ALLOW_SCRIPT },

 #ifdef MOZ_SERVICES_SYNC

   { "sync-progress", "chrome://browser/content/sync/progress.xhtml",

     nsIAboutModule::ALLOW_SCRIPT },

   { "sync-tabs", "chrome://browser/content/sync/aboutSyncTabs.xul",

     nsIAboutModule::ALLOW_SCRIPT },

 #endif

   { "home", "chrome://browser/content/abouthome/aboutHome.xhtml",

     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |

     nsIAboutModule::ALLOW_SCRIPT },

   { "newtab", "chrome://browser/content/newtab/newTab.xul",

     nsIAboutModule::ALLOW_SCRIPT },

   { "permissions", "chrome://browser/content/preferences/aboutPermissions.xul",

     nsIAboutModule::ALLOW_SCRIPT },

   { "preferences", "chrome://browser/content/preferences/in-content/preferences.xul",

     nsIAboutModule::ALLOW_SCRIPT },

   { "downloads", "chrome://browser/content/downloads/contentAreaDownloadsView.xul",

     nsIAboutModule::ALLOW_SCRIPT },

 #ifdef MOZ_SERVICES_HEALTHREPORT

   { "healthreport", "chrome://browser/content/abouthealthreport/abouthealth.xhtml",

     nsIAboutModule::ALLOW_SCRIPT },

 #endif

   { "accounts", "chrome://browser/content/aboutaccounts/aboutaccounts.xhtml",

     nsIAboutModule::ALLOW_SCRIPT },

   { "app-manager", "chrome://browser/content/devtools/app-manager/index.xul",

     nsIAboutModule::ALLOW_SCRIPT },

   { "customizing", "chrome://browser/content/customizableui/aboutCustomizing.xul",

     nsIAboutModule::ALLOW_SCRIPT },

 };

 static const int kRedirTotal = ArrayLength(kRedirMap);

 static nsAutoCString

 GetAboutModuleName(nsIURI *aURI)

 {

   nsAutoCString path;

   aURI->GetPath(path);

   int32_t f = path.FindChar('#');

   if (f >= 0)

     path.SetLength(f);

   f = path.FindChar('?');

   if (f >= 0)

     path.SetLength(f);

   ToLowerCase(path);

   return path;

 }

 NS_IMETHODIMP

 AboutRedirector::NewChannel(nsIURI *aURI, nsIChannel **result) 

 {

   NS_ENSURE_ARG_POINTER(aURI);

   NS_ASSERTION(result, "must not be null");

   nsAutoCString path = GetAboutModuleName(aURI);

   nsresult rv;

   nsCOMPtr<nsIIOService> ioService = do_GetIOService(&rv);

   NS_ENSURE_SUCCESS(rv, rv);

   for (int i = 0; i < kRedirTotal; i++) {

     if (!strcmp(path.get(), kRedirMap[i].id)) {

       nsCOMPtr<nsIChannel> tempChannel;

       rv = ioService->NewChannel(nsDependentCString(kRedirMap[i].url),

                                  nullptr, nullptr, getter_AddRefs(tempChannel));

       NS_ENSURE_SUCCESS(rv, rv);

       tempChannel->SetOriginalURI(aURI);

       NS_ADDREF(*result = tempChannel);

       return rv;

     }

   }

   return NS_ERROR_ILLEGAL_VALUE;

 }

 NS_IMETHODIMP

 AboutRedirector::GetURIFlags(nsIURI *aURI, uint32_t *result)

 {

   NS_ENSURE_ARG_POINTER(aURI);

   nsAutoCString name = GetAboutModuleName(aURI);

   for (int i = 0; i < kRedirTotal; i++) {

     if (name.Equals(kRedirMap[i].id)) {

       *result = kRedirMap[i].flags;

       return NS_OK;

     }

   }

   return NS_ERROR_ILLEGAL_VALUE;

 }

 nsresult

 AboutRedirector::Create(nsISupports *aOuter, REFNSIID aIID, void **result)

 {

   AboutRedirector* about = new AboutRedirector();

   if (about == nullptr)

     return NS_ERROR_OUT_OF_MEMORY;

   NS_ADDREF(about);

   nsresult rv = about->QueryInterface(aIID, result);

   NS_RELEASE(about);

   return rv;

 }

 } // namespace browser

 } // namespace mozilla