DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (d1c688190228)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */

#include "nsAboutRedirector.h"
#include "nsNetUtil.h"
#include "nsAboutProtocolUtils.h"
#include "mozilla/ArrayUtils.h"
#include "nsIProtocolHandler.h"

NS_IMPL_ISUPPORTS(nsAboutRedirector, 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 const RedirEntry kRedirMap[] = {
    {"about", "chrome://global/content/aboutAbout.xhtml", 0},
    {"addons", "chrome://mozapps/content/extensions/extensions.xul",
     nsIAboutModule::ALLOW_SCRIPT},
    {"buildconfig", "chrome://global/content/buildconfig.html",
     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT},
    {"checkerboard", "chrome://global/content/aboutCheckerboard.xhtml",
     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
         nsIAboutModule::ALLOW_SCRIPT},
    {"config", "chrome://global/content/config.xul", 0},
#ifdef MOZ_CRASHREPORTER
    {"crashes", "chrome://global/content/crashes.xhtml", 0},
#endif
    {"credits", "https://www.mozilla.org/credits/",
     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT},
    {"license", "chrome://global/content/license.html",
     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
         nsIAboutModule::MAKE_LINKABLE},
    {"logo", "chrome://branding/content/about.png",
     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
         // Linkable for testing reasons.
         nsIAboutModule::MAKE_LINKABLE},
    {"memory", "chrome://global/content/aboutMemory.xhtml",
     nsIAboutModule::ALLOW_SCRIPT},
    {"mozilla", "chrome://global/content/mozilla.xhtml",
     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT},
    {"neterror", "chrome://global/content/netError.xhtml",
     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
         nsIAboutModule::URI_CAN_LOAD_IN_CHILD | nsIAboutModule::ALLOW_SCRIPT |
         nsIAboutModule::HIDE_FROM_ABOUTABOUT},
    {"networking", "chrome://global/content/aboutNetworking.xhtml",
     nsIAboutModule::ALLOW_SCRIPT},
    {"newaddon", "chrome://mozapps/content/extensions/newaddon.xul",
     nsIAboutModule::ALLOW_SCRIPT | nsIAboutModule::HIDE_FROM_ABOUTABOUT},
    {"performance", "chrome://global/content/aboutPerformance.xhtml",
     nsIAboutModule::ALLOW_SCRIPT},
    {"plugins", "chrome://global/content/plugins.html",
     nsIAboutModule::URI_MUST_LOAD_IN_CHILD},
    {"serviceworkers", "chrome://global/content/aboutServiceWorkers.xhtml",
     nsIAboutModule::URI_CAN_LOAD_IN_CHILD |
         nsIAboutModule::URI_MUST_LOAD_IN_CHILD | nsIAboutModule::ALLOW_SCRIPT},
#ifndef ANDROID
    {"profiles", "chrome://global/content/aboutProfiles.xhtml",
     nsIAboutModule::ALLOW_SCRIPT},
#endif
    // about:srcdoc is unresolvable by specification.  It is included here
    // because the security manager would disallow srcdoc iframes otherwise.
    {"srcdoc", "about:blank",
     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
         nsIAboutModule::HIDE_FROM_ABOUTABOUT |
         // Needs to be linkable so content can touch its own srcdoc frames
         nsIAboutModule::MAKE_LINKABLE | nsIAboutModule::URI_CAN_LOAD_IN_CHILD},
    {"support", "chrome://global/content/aboutSupport.xhtml",
     nsIAboutModule::ALLOW_SCRIPT},
    {"telemetry", "chrome://global/content/aboutTelemetry.xhtml",
     nsIAboutModule::ALLOW_SCRIPT},
    {"url-classifier", "chrome://global/content/aboutUrlClassifier.xhtml",
     nsIAboutModule::ALLOW_SCRIPT},
    {"webrtc", "chrome://global/content/aboutwebrtc/aboutWebrtc.html",
     nsIAboutModule::ALLOW_SCRIPT},
    {"printpreview", "about:blank",
     nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
         nsIAboutModule::HIDE_FROM_ABOUTABOUT |
         nsIAboutModule::URI_CAN_LOAD_IN_CHILD}};
static const int kRedirTotal = mozilla::ArrayLength(kRedirMap);

NS_IMETHODIMP
nsAboutRedirector::NewChannel(nsIURI* aURI, nsILoadInfo* aLoadInfo,
                              nsIChannel** aResult) {
  NS_ENSURE_ARG_POINTER(aURI);
  NS_ENSURE_ARG_POINTER(aLoadInfo);
  NS_ASSERTION(aResult, "must not be null");

  nsAutoCString path;
  nsresult rv = NS_GetAboutModuleName(aURI, path);
  NS_ENSURE_SUCCESS(rv, 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;
      nsCOMPtr<nsIURI> tempURI;
      rv = NS_NewURI(getter_AddRefs(tempURI), kRedirMap[i].url);
      NS_ENSURE_SUCCESS(rv, rv);

      rv = NS_NewChannelInternal(getter_AddRefs(tempChannel), tempURI,
                                 aLoadInfo);
      NS_ENSURE_SUCCESS(rv, rv);

      // If tempURI links to an external URI (i.e. something other than
      // chrome:// or resource://) then set result principal URI on the
      // load info which forces the channel principal to reflect the displayed
      // URL rather then being the systemPrincipal.
      bool isUIResource = false;
      rv = NS_URIChainHasFlags(tempURI, nsIProtocolHandler::URI_IS_UI_RESOURCE,
                               &isUIResource);
      NS_ENSURE_SUCCESS(rv, rv);

      bool isAboutBlank = NS_IsAboutBlank(tempURI);

      if (!isUIResource && !isAboutBlank) {
        aLoadInfo->SetResultPrincipalURI(tempURI);
      }

      tempChannel->SetOriginalURI(aURI);

      tempChannel.forget(aResult);
      return rv;
    }
  }

  NS_ERROR("nsAboutRedirector called for unknown case");
  return NS_ERROR_ILLEGAL_VALUE;
}

NS_IMETHODIMP
nsAboutRedirector::GetURIFlags(nsIURI* aURI, uint32_t* aResult) {
  NS_ENSURE_ARG_POINTER(aURI);

  nsAutoCString name;
  nsresult rv = NS_GetAboutModuleName(aURI, name);
  NS_ENSURE_SUCCESS(rv, rv);

  for (int i = 0; i < kRedirTotal; i++) {
    if (name.EqualsASCII(kRedirMap[i].id)) {
      *aResult = kRedirMap[i].flags;
      return NS_OK;
    }
  }

  NS_ERROR("nsAboutRedirector called for unknown case");
  return NS_ERROR_ILLEGAL_VALUE;
}

nsresult nsAboutRedirector::Create(nsISupports* aOuter, REFNSIID aIID,
                                   void** aResult) {
  RefPtr<nsAboutRedirector> about = new nsAboutRedirector();
  return about->QueryInterface(aIID, aResult);
}