diff options
Diffstat (limited to 'docshell/base/nsAboutRedirector.cpp')
| -rw-r--r-- | docshell/base/nsAboutRedirector.cpp | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/docshell/base/nsAboutRedirector.cpp b/docshell/base/nsAboutRedirector.cpp new file mode 100644 index 0000000000..fdae228b90 --- /dev/null +++ b/docshell/base/nsAboutRedirector.cpp @@ -0,0 +1,318 @@ +/* -*- 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/dom/ContentParent.h" +#include "mozilla/dom/RemoteType.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"); + } + + if (spec.EqualsASCII("about:crashextensions") && XRE_IsParentProcess()) { + using ContentParent = mozilla::dom::ContentParent; + nsTArray<RefPtr<ContentParent>> toKill; + for (auto* cp : ContentParent::AllProcesses(ContentParent::eLive)) { + if (cp->GetRemoteType() == EXTENSION_REMOTE_TYPE) { + toKill.AppendElement(cp); + } + } + for (auto& cp : toKill) { + cp->KillHard("Killed via about:crashextensions"); + } + } + + 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}, +#if !defined(ANDROID) && !defined(XP_WIN) + {"webauthn", "chrome://global/content/aboutWebauthn.html", + nsIAboutModule::ALLOW_SCRIPT | nsIAboutModule::IS_SECURE_CHROME_UI}, +#endif + {"neterror", "chrome://global/content/aboutNetError.html", + 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", "about:processes", + nsIAboutModule::ALLOW_SCRIPT | nsIAboutModule::IS_SECURE_CHROME_UI | + nsIAboutModule::HIDE_FROM_ABOUTABOUT}, + {"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::URI_CAN_LOAD_IN_PRIVILEGEDABOUT_PROCESS | + 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_SAFE_FOR_UNTRUSTED_CONTENT | + nsIAboutModule::URI_CAN_LOAD_IN_CHILD | + nsIAboutModule::URI_MUST_LOAD_IN_CHILD}, + {"crashgpu", "about:blank", nsIAboutModule::HIDE_FROM_ABOUTABOUT}, + {"crashextensions", "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<nsIIOService> ioService = do_GetIOService(&rv); + NS_ENSURE_SUCCESS(rv, rv); + + if (path.EqualsASCII("crashparent") || path.EqualsASCII("crashcontent") || + path.EqualsASCII("crashgpu") || path.EqualsASCII("crashextensions")) { + bool isExternal; + aLoadInfo->GetLoadTriggeredFromExternal(&isExternal); + if (isExternal || !aLoadInfo->TriggeringPrincipal() || + !aLoadInfo->TriggeringPrincipal()->IsSystemPrincipal()) { + return NS_ERROR_NOT_AVAILABLE; + } + + nsCOMPtr<nsIChannel> 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<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; +} + +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<nsAboutRedirector> about = new nsAboutRedirector(); + return about->QueryInterface(aIID, aResult); +} |