/* -*- 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 "nsBaseChannel.h" #include "mozilla/ArrayUtils.h" #include "nsIProtocolHandler.h" #include "nsXULAppAPI.h" #include "mozilla/Preferences.h" #include "mozilla/gfx/GPUProcessManager.h" #define ABOUT_CONFIG_ENABLED_PREF "general.aboutConfig.enable" NS_IMPL_ISUPPORTS(nsAboutRedirector, nsIAboutModule) struct RedirEntry { const char* id; const char* url; uint32_t flags; }; class CrashChannel final : public nsBaseChannel { public: explicit CrashChannel(nsIURI* aURI) { SetURI(aURI); } nsresult OpenContentStream(bool async, nsIInputStream** stream, nsIChannel** channel) override { nsAutoCString spec; mURI->GetSpec(spec); if (spec.EqualsASCII("about:crashparent") && XRE_IsParentProcess()) { MOZ_CRASH("Crash via about:crashparent"); } if (spec.EqualsASCII("about:crashgpu") && XRE_IsParentProcess()) { if (auto* gpu = mozilla::gfx::GPUProcessManager::Get()) { gpu->CrashProcess(); } } if (spec.EqualsASCII("about:crashcontent") && XRE_IsContentProcess()) { MOZ_CRASH("Crash via about:crashcontent"); } NS_WARNING("Unhandled about:crash* URI or wrong process"); return NS_ERROR_NOT_IMPLEMENTED; } protected: virtual ~CrashChannel() = default; }; /* 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. URI_SAFE_FOR_UNTRUSTED_CONTENT is not enough to let web pages load that page, for that you need MAKE_LINKABLE. NOTE: changes to this redir map need to be accompanied with changes to docshell/build/components.conf */ static const RedirEntry kRedirMap[] = { {"about", "chrome://global/content/aboutAbout.html", 0}, {"addons", "chrome://mozapps/content/extensions/aboutaddons.html", nsIAboutModule::ALLOW_SCRIPT | nsIAboutModule::IS_SECURE_CHROME_UI}, {"buildconfig", "chrome://global/content/buildconfig.html", nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT | nsIAboutModule::IS_SECURE_CHROME_UI}, {"checkerboard", "chrome://global/content/aboutCheckerboard.html", nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT | nsIAboutModule::ALLOW_SCRIPT}, #ifndef MOZ_WIDGET_ANDROID {"config", "chrome://global/content/aboutconfig/aboutconfig.html", nsIAboutModule::IS_SECURE_CHROME_UI}, #else {"config", "chrome://geckoview/content/config.xhtml", nsIAboutModule::IS_SECURE_CHROME_UI}, #endif #ifdef MOZ_CRASHREPORTER {"crashes", "chrome://global/content/crashes.html", nsIAboutModule::IS_SECURE_CHROME_UI}, #endif {"credits", "https://www.mozilla.org/credits/", nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT | nsIAboutModule::URI_MUST_LOAD_IN_CHILD}, {"httpsonlyerror", "chrome://global/content/httpsonlyerror/errorpage.html", nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT | nsIAboutModule::URI_CAN_LOAD_IN_CHILD | nsIAboutModule::ALLOW_SCRIPT | nsIAboutModule::HIDE_FROM_ABOUTABOUT}, {"license", "chrome://global/content/license.html", nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT | nsIAboutModule::IS_SECURE_CHROME_UI}, {"logging", "chrome://global/content/aboutLogging.html", nsIAboutModule::ALLOW_SCRIPT}, {"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}, {"certificate", "chrome://global/content/certviewer/certviewer.html", nsIAboutModule::ALLOW_SCRIPT | nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT | nsIAboutModule::URI_MUST_LOAD_IN_CHILD | nsIAboutModule::URI_CAN_LOAD_IN_PRIVILEGEDABOUT_PROCESS | nsIAboutModule::IS_SECURE_CHROME_UI}, {"mozilla", "chrome://global/content/mozilla.html", nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT}, {"neterror", "chrome://global/content/aboutNetError.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.html", nsIAboutModule::ALLOW_SCRIPT}, {"performance", "chrome://global/content/aboutPerformance.html", nsIAboutModule::ALLOW_SCRIPT | nsIAboutModule::IS_SECURE_CHROME_UI}, #ifndef ANDROID {"plugins", "chrome://global/content/plugins.html", nsIAboutModule::URI_MUST_LOAD_IN_CHILD | nsIAboutModule::IS_SECURE_CHROME_UI}, #endif {"processes", "chrome://global/content/aboutProcesses.html", nsIAboutModule::ALLOW_SCRIPT | nsIAboutModule::IS_SECURE_CHROME_UI}, // about:serviceworkers always wants to load in the parent process because // the only place nsIServiceWorkerManager has any data is in the parent // process. // // There is overlap without about:debugging, but about:debugging is not // available on mobile at this time, and it's useful to be able to know if // a ServiceWorker is registered directly from the mobile browser without // having to connect the device to a desktop machine and all that entails. {"serviceworkers", "chrome://global/content/aboutServiceWorkers.xhtml", nsIAboutModule::ALLOW_SCRIPT}, #ifndef ANDROID {"profiles", "chrome://global/content/aboutProfiles.xhtml", nsIAboutModule::ALLOW_SCRIPT | nsIAboutModule::IS_SECURE_CHROME_UI}, #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 | nsIAboutModule::IS_SECURE_CHROME_UI}, #ifdef XP_WIN {"third-party", "chrome://global/content/aboutThirdParty.html", nsIAboutModule::ALLOW_SCRIPT}, {"windows-messages", "chrome://global/content/aboutWindowsMessages.html", nsIAboutModule::ALLOW_SCRIPT}, #endif #ifndef MOZ_GLEAN_ANDROID {"glean", "chrome://global/content/aboutGlean.html", # if !defined(NIGHTLY_BUILD) && defined(MOZILLA_OFFICIAL) nsIAboutModule::HIDE_FROM_ABOUTABOUT | # endif nsIAboutModule::ALLOW_SCRIPT}, #endif {"telemetry", "chrome://global/content/aboutTelemetry.xhtml", nsIAboutModule::ALLOW_SCRIPT | nsIAboutModule::IS_SECURE_CHROME_UI}, {"translations", "chrome://global/content/translations/translations.html", nsIAboutModule::ALLOW_SCRIPT | nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT | nsIAboutModule::URI_MUST_LOAD_IN_CHILD | nsIAboutModule::HIDE_FROM_ABOUTABOUT}, {"url-classifier", "chrome://global/content/aboutUrlClassifier.xhtml", nsIAboutModule::ALLOW_SCRIPT}, {"webrtc", "chrome://global/content/aboutwebrtc/aboutWebrtc.html", nsIAboutModule::ALLOW_SCRIPT}, {"crashparent", "about:blank", nsIAboutModule::HIDE_FROM_ABOUTABOUT}, {"crashcontent", "about:blank", nsIAboutModule::HIDE_FROM_ABOUTABOUT | nsIAboutModule::URI_CAN_LOAD_IN_CHILD | nsIAboutModule::URI_MUST_LOAD_IN_CHILD}, {"crashgpu", "about:blank", nsIAboutModule::HIDE_FROM_ABOUTABOUT}}; 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 ioService = do_GetIOService(&rv); NS_ENSURE_SUCCESS(rv, rv); if (path.EqualsASCII("crashparent") || path.EqualsASCII("crashcontent") || path.EqualsASCII("crashgpu")) { bool isExternal; aLoadInfo->GetLoadTriggeredFromExternal(&isExternal); if (isExternal) { return NS_ERROR_NOT_AVAILABLE; } nsCOMPtr channel = new CrashChannel(aURI); channel->SetLoadInfo(aLoadInfo); channel.forget(aResult); return NS_OK; } if (path.EqualsASCII("config") && !mozilla::Preferences::GetBool(ABOUT_CONFIG_ENABLED_PREF, true)) { return NS_ERROR_NOT_AVAILABLE; } for (int i = 0; i < kRedirTotal; i++) { if (!strcmp(path.get(), kRedirMap[i].id)) { nsCOMPtr tempChannel; nsCOMPtr 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; } NS_IMETHODIMP nsAboutRedirector::GetChromeURI(nsIURI* aURI, nsIURI** chromeURI) { NS_ENSURE_ARG_POINTER(aURI); nsAutoCString name; nsresult rv = NS_GetAboutModuleName(aURI, name); NS_ENSURE_SUCCESS(rv, rv); for (const auto& redir : kRedirMap) { if (name.EqualsASCII(redir.id)) { return NS_NewURI(chromeURI, redir.url); } } NS_ERROR("nsAboutRedirector called for unknown case"); return NS_ERROR_ILLEGAL_VALUE; } nsresult nsAboutRedirector::Create(REFNSIID aIID, void** aResult) { RefPtr about = new nsAboutRedirector(); return about->QueryInterface(aIID, aResult); }