зеркало из https://github.com/mozilla/gecko-dev.git
838 строки
28 KiB
C++
838 строки
28 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsContentSecurityManager.h"
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#include "nsEscape.h"
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#include "nsDataHandler.h"
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#include "nsIChannel.h"
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#include "nsIHttpChannelInternal.h"
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#include "nsIStreamListener.h"
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#include "nsILoadInfo.h"
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#include "nsIOService.h"
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#include "nsContentUtils.h"
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#include "nsCORSListenerProxy.h"
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#include "nsIStreamListener.h"
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#include "nsIDocument.h"
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#include "nsMixedContentBlocker.h"
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#include "nsCDefaultURIFixup.h"
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#include "nsIURIFixup.h"
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#include "nsIImageLoadingContent.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/TabChild.h"
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NS_IMPL_ISUPPORTS(nsContentSecurityManager,
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nsIContentSecurityManager,
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nsIChannelEventSink)
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/* static */ bool
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nsContentSecurityManager::AllowTopLevelNavigationToDataURI(nsIChannel* aChannel)
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{
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// Let's block all toplevel document navigations to a data: URI.
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// In all cases where the toplevel document is navigated to a
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// data: URI the triggeringPrincipal is a codeBasePrincipal, or
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// a NullPrincipal. In other cases, e.g. typing a data: URL into
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// the URL-Bar, the triggeringPrincipal is a SystemPrincipal;
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// we don't want to block those loads. Only exception, loads coming
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// from an external applicaton (e.g. Thunderbird) don't load
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// using a codeBasePrincipal, but we want to block those loads.
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if (!mozilla::net::nsIOService::BlockToplevelDataUriNavigations()) {
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return true;
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}
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nsCOMPtr<nsILoadInfo> loadInfo = aChannel->GetLoadInfo();
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if (!loadInfo) {
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return true;
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}
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if (loadInfo->GetExternalContentPolicyType() != nsIContentPolicy::TYPE_DOCUMENT) {
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return true;
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}
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if (loadInfo->GetForceAllowDataURI()) {
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// if the loadinfo explicitly allows the data URI navigation, let's allow it now
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return true;
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}
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nsCOMPtr<nsIURI> uri;
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nsresult rv = NS_GetFinalChannelURI(aChannel, getter_AddRefs(uri));
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NS_ENSURE_SUCCESS(rv, true);
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bool isDataURI =
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(NS_SUCCEEDED(uri->SchemeIs("data", &isDataURI)) && isDataURI);
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if (!isDataURI) {
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return true;
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}
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nsAutoCString spec;
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rv = uri->GetSpec(spec);
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NS_ENSURE_SUCCESS(rv, true);
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nsAutoCString contentType;
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bool base64;
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rv = nsDataHandler::ParseURI(spec, contentType, nullptr,
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base64, nullptr);
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NS_ENSURE_SUCCESS(rv, true);
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// Whitelist data: images as long as they are not SVGs
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if (StringBeginsWith(contentType, NS_LITERAL_CSTRING("image/")) &&
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!contentType.EqualsLiteral("image/svg+xml")) {
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return true;
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}
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// Whitelist all plain text types as well as data: PDFs.
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if (nsContentUtils::IsPlainTextType(contentType) ||
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contentType.EqualsLiteral("application/pdf")) {
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return true;
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}
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// Redirecting to a toplevel data: URI is not allowed, hence we make
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// sure the RedirectChain is empty.
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if (!loadInfo->GetLoadTriggeredFromExternal() &&
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nsContentUtils::IsSystemPrincipal(loadInfo->TriggeringPrincipal()) &&
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loadInfo->RedirectChain().IsEmpty()) {
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return true;
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}
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nsAutoCString dataSpec;
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uri->GetSpec(dataSpec);
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if (dataSpec.Length() > 50) {
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dataSpec.Truncate(50);
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dataSpec.AppendLiteral("...");
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}
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nsCOMPtr<nsITabChild> tabChild = do_QueryInterface(loadInfo->ContextForTopLevelLoad());
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nsCOMPtr<nsIDocument> doc;
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if (tabChild) {
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doc = static_cast<mozilla::dom::TabChild*>(tabChild.get())->GetDocument();
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}
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NS_ConvertUTF8toUTF16 specUTF16(NS_UnescapeURL(dataSpec));
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const char16_t* params[] = { specUTF16.get() };
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nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
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NS_LITERAL_CSTRING("DATA_URI_BLOCKED"),
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doc,
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nsContentUtils::eSECURITY_PROPERTIES,
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"BlockTopLevelDataURINavigation",
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params, ArrayLength(params));
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return false;
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}
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static nsresult
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ValidateSecurityFlags(nsILoadInfo* aLoadInfo)
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{
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nsSecurityFlags securityMode = aLoadInfo->GetSecurityMode();
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if (securityMode != nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_DATA_INHERITS &&
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securityMode != nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_DATA_IS_BLOCKED &&
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securityMode != nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_INHERITS &&
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securityMode != nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL &&
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securityMode != nsILoadInfo::SEC_REQUIRE_CORS_DATA_INHERITS) {
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MOZ_ASSERT(false, "need one securityflag from nsILoadInfo to perform security checks");
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return NS_ERROR_FAILURE;
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}
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// all good, found the right security flags
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return NS_OK;
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}
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static bool IsImageLoadInEditorAppType(nsILoadInfo* aLoadInfo)
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{
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// Editor apps get special treatment here, editors can load images
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// from anywhere. This allows editor to insert images from file://
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// into documents that are being edited.
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nsContentPolicyType type = aLoadInfo->InternalContentPolicyType();
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if (type != nsIContentPolicy::TYPE_INTERNAL_IMAGE &&
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type != nsIContentPolicy::TYPE_INTERNAL_IMAGE_PRELOAD &&
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type != nsIContentPolicy::TYPE_INTERNAL_IMAGE_FAVICON &&
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type != nsIContentPolicy::TYPE_IMAGESET) {
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return false;
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}
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uint32_t appType = nsIDocShell::APP_TYPE_UNKNOWN;
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nsINode* node = aLoadInfo->LoadingNode();
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if (!node) {
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return false;
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}
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nsIDocument* doc = node->OwnerDoc();
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if (!doc) {
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return false;
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}
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nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem = doc->GetDocShell();
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if (!docShellTreeItem) {
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return false;
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}
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nsCOMPtr<nsIDocShellTreeItem> root;
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docShellTreeItem->GetRootTreeItem(getter_AddRefs(root));
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nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(root));
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if (!docShell || NS_FAILED(docShell->GetAppType(&appType))) {
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appType = nsIDocShell::APP_TYPE_UNKNOWN;
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}
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return appType == nsIDocShell::APP_TYPE_EDITOR;
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}
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static nsresult
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DoCheckLoadURIChecks(nsIURI* aURI, nsILoadInfo* aLoadInfo)
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{
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// Bug 1228117: determine the correct security policy for DTD loads
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if (aLoadInfo->GetExternalContentPolicyType() == nsIContentPolicy::TYPE_DTD) {
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return NS_OK;
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}
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if (IsImageLoadInEditorAppType(aLoadInfo)) {
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return NS_OK;
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}
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uint32_t flags = nsIScriptSecurityManager::STANDARD;
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if (aLoadInfo->GetAllowChrome()) {
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flags |= nsIScriptSecurityManager::ALLOW_CHROME;
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}
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if (aLoadInfo->GetDisallowScript()) {
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flags |= nsIScriptSecurityManager::DISALLOW_SCRIPT;
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}
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// Only call CheckLoadURIWithPrincipal() using the TriggeringPrincipal and not
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// the LoadingPrincipal when SEC_ALLOW_CROSS_ORIGIN_* security flags are set,
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// to allow, e.g. user stylesheets to load chrome:// URIs.
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return nsContentUtils::GetSecurityManager()->
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CheckLoadURIWithPrincipal(aLoadInfo->TriggeringPrincipal(),
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aURI,
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flags);
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}
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static bool
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URIHasFlags(nsIURI* aURI, uint32_t aURIFlags)
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{
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bool hasFlags;
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nsresult rv = NS_URIChainHasFlags(aURI, aURIFlags, &hasFlags);
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NS_ENSURE_SUCCESS(rv, false);
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return hasFlags;
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}
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static nsresult
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DoSOPChecks(nsIURI* aURI, nsILoadInfo* aLoadInfo, nsIChannel* aChannel)
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{
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if (aLoadInfo->GetAllowChrome() &&
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(URIHasFlags(aURI, nsIProtocolHandler::URI_IS_UI_RESOURCE) ||
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nsContentUtils::SchemeIs(aURI, "moz-safe-about"))) {
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// UI resources are allowed.
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return DoCheckLoadURIChecks(aURI, aLoadInfo);
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}
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NS_ENSURE_FALSE(NS_HasBeenCrossOrigin(aChannel, true),
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NS_ERROR_DOM_BAD_URI);
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return NS_OK;
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}
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static nsresult
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DoCORSChecks(nsIChannel* aChannel, nsILoadInfo* aLoadInfo,
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nsCOMPtr<nsIStreamListener>& aInAndOutListener)
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{
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MOZ_RELEASE_ASSERT(aInAndOutListener, "can not perform CORS checks without a listener");
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// No need to set up CORS if TriggeringPrincipal is the SystemPrincipal.
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// For example, allow user stylesheets to load XBL from external files
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// without requiring CORS.
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if (nsContentUtils::IsSystemPrincipal(aLoadInfo->TriggeringPrincipal())) {
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return NS_OK;
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}
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nsIPrincipal* loadingPrincipal = aLoadInfo->LoadingPrincipal();
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RefPtr<nsCORSListenerProxy> corsListener =
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new nsCORSListenerProxy(aInAndOutListener,
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loadingPrincipal,
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aLoadInfo->GetCookiePolicy() ==
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nsILoadInfo::SEC_COOKIES_INCLUDE);
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// XXX: @arg: DataURIHandling::Allow
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// lets use DataURIHandling::Allow for now and then decide on callsite basis. see also:
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// http://mxr.mozilla.org/mozilla-central/source/dom/security/nsCORSListenerProxy.h#33
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nsresult rv = corsListener->Init(aChannel, DataURIHandling::Allow);
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NS_ENSURE_SUCCESS(rv, rv);
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aInAndOutListener = corsListener;
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return NS_OK;
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}
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static nsresult
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DoContentSecurityChecks(nsIChannel* aChannel, nsILoadInfo* aLoadInfo)
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{
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nsContentPolicyType contentPolicyType =
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aLoadInfo->GetExternalContentPolicyType();
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nsContentPolicyType internalContentPolicyType =
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aLoadInfo->InternalContentPolicyType();
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nsCString mimeTypeGuess;
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nsCOMPtr<nsISupports> requestingContext = nullptr;
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nsCOMPtr<nsIURI> uri;
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nsresult rv = NS_GetFinalChannelURI(aChannel, getter_AddRefs(uri));
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NS_ENSURE_SUCCESS(rv, rv);
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if (contentPolicyType == nsIContentPolicy::TYPE_DOCUMENT ||
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contentPolicyType == nsIContentPolicy::TYPE_SUBDOCUMENT) {
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// TYPE_DOCUMENT and TYPE_SUBDOCUMENT loads might potentially
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// be wyciwyg:// channels. Let's fix up the URI so we can
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// perform proper security checks.
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nsCOMPtr<nsIURIFixup> urifixup(do_GetService(NS_URIFIXUP_CONTRACTID, &rv));
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if (NS_SUCCEEDED(rv) && urifixup) {
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nsCOMPtr<nsIURI> fixedURI;
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rv = urifixup->CreateExposableURI(uri, getter_AddRefs(fixedURI));
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if (NS_SUCCEEDED(rv)) {
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uri = fixedURI;
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}
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}
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}
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switch(contentPolicyType) {
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case nsIContentPolicy::TYPE_OTHER: {
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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case nsIContentPolicy::TYPE_SCRIPT: {
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mimeTypeGuess = NS_LITERAL_CSTRING("application/javascript");
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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case nsIContentPolicy::TYPE_IMAGE: {
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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case nsIContentPolicy::TYPE_STYLESHEET: {
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mimeTypeGuess = NS_LITERAL_CSTRING("text/css");
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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case nsIContentPolicy::TYPE_OBJECT: {
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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case nsIContentPolicy::TYPE_DOCUMENT: {
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->ContextForTopLevelLoad();
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break;
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}
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case nsIContentPolicy::TYPE_SUBDOCUMENT: {
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mimeTypeGuess = NS_LITERAL_CSTRING("text/html");
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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case nsIContentPolicy::TYPE_REFRESH: {
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MOZ_ASSERT(false, "contentPolicyType not supported yet");
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break;
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}
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case nsIContentPolicy::TYPE_XBL: {
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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case nsIContentPolicy::TYPE_PING: {
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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case nsIContentPolicy::TYPE_XMLHTTPREQUEST: {
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// alias nsIContentPolicy::TYPE_DATAREQUEST:
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requestingContext = aLoadInfo->LoadingNode();
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#ifdef DEBUG
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{
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nsCOMPtr<nsINode> node = do_QueryInterface(requestingContext);
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MOZ_ASSERT(!node || node->NodeType() == nsIDOMNode::DOCUMENT_NODE,
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"type_xml requires requestingContext of type Document");
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}
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#endif
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// We're checking for the external TYPE_XMLHTTPREQUEST here in case
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// an addon creates a request with that type.
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if (internalContentPolicyType ==
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nsIContentPolicy::TYPE_INTERNAL_XMLHTTPREQUEST ||
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internalContentPolicyType ==
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nsIContentPolicy::TYPE_XMLHTTPREQUEST) {
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mimeTypeGuess = EmptyCString();
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}
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else {
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MOZ_ASSERT(internalContentPolicyType ==
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nsIContentPolicy::TYPE_INTERNAL_EVENTSOURCE,
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"can not set mime type guess for unexpected internal type");
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mimeTypeGuess = NS_LITERAL_CSTRING(TEXT_EVENT_STREAM);
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}
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break;
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}
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case nsIContentPolicy::TYPE_OBJECT_SUBREQUEST: {
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->LoadingNode();
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#ifdef DEBUG
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{
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nsCOMPtr<nsINode> node = do_QueryInterface(requestingContext);
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MOZ_ASSERT(!node || node->NodeType() == nsIDOMNode::ELEMENT_NODE,
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"type_subrequest requires requestingContext of type Element");
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}
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#endif
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break;
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}
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case nsIContentPolicy::TYPE_DTD: {
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->LoadingNode();
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#ifdef DEBUG
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{
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nsCOMPtr<nsINode> node = do_QueryInterface(requestingContext);
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MOZ_ASSERT(!node || node->NodeType() == nsIDOMNode::DOCUMENT_NODE,
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"type_dtd requires requestingContext of type Document");
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}
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#endif
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break;
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}
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case nsIContentPolicy::TYPE_FONT: {
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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case nsIContentPolicy::TYPE_MEDIA: {
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if (internalContentPolicyType == nsIContentPolicy::TYPE_INTERNAL_TRACK) {
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mimeTypeGuess = NS_LITERAL_CSTRING("text/vtt");
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}
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else {
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mimeTypeGuess = EmptyCString();
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}
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requestingContext = aLoadInfo->LoadingNode();
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#ifdef DEBUG
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{
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nsCOMPtr<nsINode> node = do_QueryInterface(requestingContext);
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MOZ_ASSERT(!node || node->NodeType() == nsIDOMNode::ELEMENT_NODE,
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"type_media requires requestingContext of type Element");
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}
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#endif
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break;
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}
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case nsIContentPolicy::TYPE_WEBSOCKET: {
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// Websockets have to use the proxied URI:
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// ws:// instead of http:// for CSP checks
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nsCOMPtr<nsIHttpChannelInternal> httpChannelInternal
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= do_QueryInterface(aChannel);
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MOZ_ASSERT(httpChannelInternal);
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if (httpChannelInternal) {
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rv = httpChannelInternal->GetProxyURI(getter_AddRefs(uri));
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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}
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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case nsIContentPolicy::TYPE_CSP_REPORT: {
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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case nsIContentPolicy::TYPE_XSLT: {
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mimeTypeGuess = NS_LITERAL_CSTRING("application/xml");
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requestingContext = aLoadInfo->LoadingNode();
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#ifdef DEBUG
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{
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nsCOMPtr<nsINode> node = do_QueryInterface(requestingContext);
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MOZ_ASSERT(!node || node->NodeType() == nsIDOMNode::DOCUMENT_NODE,
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"type_xslt requires requestingContext of type Document");
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}
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#endif
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break;
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}
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case nsIContentPolicy::TYPE_BEACON: {
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->LoadingNode();
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#ifdef DEBUG
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{
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nsCOMPtr<nsINode> node = do_QueryInterface(requestingContext);
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MOZ_ASSERT(!node || node->NodeType() == nsIDOMNode::DOCUMENT_NODE,
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"type_beacon requires requestingContext of type Document");
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}
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#endif
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break;
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}
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case nsIContentPolicy::TYPE_FETCH: {
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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case nsIContentPolicy::TYPE_IMAGESET: {
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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case nsIContentPolicy::TYPE_WEB_MANIFEST: {
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mimeTypeGuess = NS_LITERAL_CSTRING("application/manifest+json");
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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case nsIContentPolicy::TYPE_SAVEAS_DOWNLOAD: {
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mimeTypeGuess = EmptyCString();
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requestingContext = aLoadInfo->LoadingNode();
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break;
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}
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default:
|
|
// nsIContentPolicy::TYPE_INVALID
|
|
MOZ_ASSERT(false, "can not perform security check without a valid contentType");
|
|
}
|
|
|
|
int16_t shouldLoad = nsIContentPolicy::ACCEPT;
|
|
rv = NS_CheckContentLoadPolicy(internalContentPolicyType,
|
|
uri,
|
|
aLoadInfo->LoadingPrincipal(),
|
|
aLoadInfo->TriggeringPrincipal(),
|
|
requestingContext,
|
|
mimeTypeGuess,
|
|
nullptr, //extra,
|
|
&shouldLoad,
|
|
nsContentUtils::GetContentPolicy());
|
|
|
|
if (NS_FAILED(rv) || NS_CP_REJECTED(shouldLoad)) {
|
|
if ((NS_SUCCEEDED(rv) && shouldLoad == nsIContentPolicy::REJECT_TYPE) &&
|
|
(contentPolicyType == nsIContentPolicy::TYPE_DOCUMENT ||
|
|
contentPolicyType == nsIContentPolicy::TYPE_SUBDOCUMENT)) {
|
|
// for docshell loads we might have to return SHOW_ALT.
|
|
return NS_ERROR_CONTENT_BLOCKED_SHOW_ALT;
|
|
}
|
|
return NS_ERROR_CONTENT_BLOCKED;
|
|
}
|
|
|
|
if (nsMixedContentBlocker::sSendHSTSPriming) {
|
|
rv = nsMixedContentBlocker::MarkLoadInfoForPriming(uri,
|
|
requestingContext,
|
|
aLoadInfo);
|
|
return rv;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/*
|
|
* Based on the security flags provided in the loadInfo of the channel,
|
|
* doContentSecurityCheck() performs the following content security checks
|
|
* before opening the channel:
|
|
*
|
|
* (1) Same Origin Policy Check (if applicable)
|
|
* (2) Allow Cross Origin but perform sanity checks whether a principal
|
|
* is allowed to access the following URL.
|
|
* (3) Perform CORS check (if applicable)
|
|
* (4) ContentPolicy checks (Content-Security-Policy, Mixed Content, ...)
|
|
*
|
|
* @param aChannel
|
|
* The channel to perform the security checks on.
|
|
* @param aInAndOutListener
|
|
* The streamListener that is passed to channel->AsyncOpen2() that is now potentially
|
|
* wrappend within nsCORSListenerProxy() and becomes the corsListener that now needs
|
|
* to be set as new streamListener on the channel.
|
|
*/
|
|
nsresult
|
|
nsContentSecurityManager::doContentSecurityCheck(nsIChannel* aChannel,
|
|
nsCOMPtr<nsIStreamListener>& aInAndOutListener)
|
|
{
|
|
NS_ENSURE_ARG(aChannel);
|
|
nsCOMPtr<nsILoadInfo> loadInfo = aChannel->GetLoadInfo();
|
|
|
|
if (!loadInfo) {
|
|
MOZ_ASSERT(false, "channel needs to have loadInfo to perform security checks");
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
// if dealing with a redirected channel then we have already installed
|
|
// streamlistener and redirect proxies and so we are done.
|
|
if (loadInfo->GetInitialSecurityCheckDone()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// make sure that only one of the five security flags is set in the loadinfo
|
|
// e.g. do not require same origin and allow cross origin at the same time
|
|
nsresult rv = ValidateSecurityFlags(loadInfo);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// since aChannel was openend using asyncOpen2() we have to make sure
|
|
// that redirects of that channel also get openend using asyncOpen2()
|
|
// please note that some implementations of ::AsyncOpen2 might already
|
|
// have set that flag to true (e.g. nsViewSourceChannel) in which case
|
|
// we just set the flag again.
|
|
loadInfo->SetEnforceSecurity(true);
|
|
|
|
if (loadInfo->GetSecurityMode() == nsILoadInfo::SEC_REQUIRE_CORS_DATA_INHERITS) {
|
|
rv = DoCORSChecks(aChannel, loadInfo, aInAndOutListener);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
rv = CheckChannel(aChannel);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Perform all ContentPolicy checks (MixedContent, CSP, ...)
|
|
rv = DoContentSecurityChecks(aChannel, loadInfo);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// now lets set the initalSecurityFlag for subsequent calls
|
|
loadInfo->SetInitialSecurityCheckDone(true);
|
|
|
|
// all security checks passed - lets allow the load
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsContentSecurityManager::AsyncOnChannelRedirect(nsIChannel* aOldChannel,
|
|
nsIChannel* aNewChannel,
|
|
uint32_t aRedirFlags,
|
|
nsIAsyncVerifyRedirectCallback *aCb)
|
|
{
|
|
nsCOMPtr<nsILoadInfo> loadInfo = aOldChannel->GetLoadInfo();
|
|
// Are we enforcing security using LoadInfo?
|
|
if (loadInfo && loadInfo->GetEnforceSecurity()) {
|
|
nsresult rv = CheckChannel(aNewChannel);
|
|
if (NS_FAILED(rv)) {
|
|
aOldChannel->Cancel(rv);
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
// Also verify that the redirecting server is allowed to redirect to the
|
|
// given URI
|
|
nsCOMPtr<nsIPrincipal> oldPrincipal;
|
|
nsContentUtils::GetSecurityManager()->
|
|
GetChannelResultPrincipal(aOldChannel, getter_AddRefs(oldPrincipal));
|
|
|
|
nsCOMPtr<nsIURI> newURI;
|
|
Unused << NS_GetFinalChannelURI(aNewChannel, getter_AddRefs(newURI));
|
|
NS_ENSURE_STATE(oldPrincipal && newURI);
|
|
|
|
const uint32_t flags =
|
|
nsIScriptSecurityManager::LOAD_IS_AUTOMATIC_DOCUMENT_REPLACEMENT |
|
|
nsIScriptSecurityManager::DISALLOW_SCRIPT;
|
|
nsresult rv = nsContentUtils::GetSecurityManager()->
|
|
CheckLoadURIWithPrincipal(oldPrincipal, newURI, flags);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
aCb->OnRedirectVerifyCallback(NS_OK);
|
|
return NS_OK;
|
|
}
|
|
|
|
static void
|
|
AddLoadFlags(nsIRequest *aRequest, nsLoadFlags aNewFlags)
|
|
{
|
|
nsLoadFlags flags;
|
|
aRequest->GetLoadFlags(&flags);
|
|
flags |= aNewFlags;
|
|
aRequest->SetLoadFlags(flags);
|
|
}
|
|
|
|
/*
|
|
* Check that this channel passes all security checks. Returns an error code
|
|
* if this requesst should not be permitted.
|
|
*/
|
|
nsresult
|
|
nsContentSecurityManager::CheckChannel(nsIChannel* aChannel)
|
|
{
|
|
nsCOMPtr<nsILoadInfo> loadInfo = aChannel->GetLoadInfo();
|
|
MOZ_ASSERT(loadInfo);
|
|
|
|
nsCOMPtr<nsIURI> uri;
|
|
nsresult rv = NS_GetFinalChannelURI(aChannel, getter_AddRefs(uri));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsContentPolicyType contentPolicyType =
|
|
loadInfo->GetExternalContentPolicyType();
|
|
|
|
if (contentPolicyType == nsIContentPolicy::TYPE_DOCUMENT ||
|
|
contentPolicyType == nsIContentPolicy::TYPE_SUBDOCUMENT) {
|
|
// TYPE_DOCUMENT and TYPE_SUBDOCUMENT loads might potentially
|
|
// be wyciwyg:// channels. Let's fix up the URI so we can
|
|
// perform proper security checks.
|
|
nsCOMPtr<nsIURIFixup> urifixup(do_GetService(NS_URIFIXUP_CONTRACTID, &rv));
|
|
if (NS_SUCCEEDED(rv) && urifixup) {
|
|
nsCOMPtr<nsIURI> fixedURI;
|
|
rv = urifixup->CreateExposableURI(uri, getter_AddRefs(fixedURI));
|
|
if (NS_SUCCEEDED(rv)) {
|
|
uri = fixedURI;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Handle cookie policies
|
|
uint32_t cookiePolicy = loadInfo->GetCookiePolicy();
|
|
if (cookiePolicy == nsILoadInfo::SEC_COOKIES_SAME_ORIGIN) {
|
|
|
|
// We shouldn't have the SEC_COOKIES_SAME_ORIGIN flag for top level loads
|
|
MOZ_ASSERT(loadInfo->GetExternalContentPolicyType() !=
|
|
nsIContentPolicy::TYPE_DOCUMENT);
|
|
nsIPrincipal* loadingPrincipal = loadInfo->LoadingPrincipal();
|
|
|
|
// It doesn't matter what we pass for the third, data-inherits, argument.
|
|
// Any protocol which inherits won't pay attention to cookies anyway.
|
|
rv = loadingPrincipal->CheckMayLoad(uri, false, false);
|
|
if (NS_FAILED(rv)) {
|
|
AddLoadFlags(aChannel, nsIRequest::LOAD_ANONYMOUS);
|
|
}
|
|
}
|
|
else if (cookiePolicy == nsILoadInfo::SEC_COOKIES_OMIT) {
|
|
AddLoadFlags(aChannel, nsIRequest::LOAD_ANONYMOUS);
|
|
}
|
|
|
|
nsSecurityFlags securityMode = loadInfo->GetSecurityMode();
|
|
|
|
// CORS mode is handled by nsCORSListenerProxy
|
|
if (securityMode == nsILoadInfo::SEC_REQUIRE_CORS_DATA_INHERITS) {
|
|
if (NS_HasBeenCrossOrigin(aChannel)) {
|
|
loadInfo->MaybeIncreaseTainting(LoadTainting::CORS);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
// Allow subresource loads if TriggeringPrincipal is the SystemPrincipal.
|
|
// For example, allow user stylesheets to load XBL from external files.
|
|
if (nsContentUtils::IsSystemPrincipal(loadInfo->TriggeringPrincipal()) &&
|
|
loadInfo->GetExternalContentPolicyType() != nsIContentPolicy::TYPE_DOCUMENT &&
|
|
loadInfo->GetExternalContentPolicyType() != nsIContentPolicy::TYPE_SUBDOCUMENT) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// if none of the REQUIRE_SAME_ORIGIN flags are set, then SOP does not apply
|
|
if ((securityMode == nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_DATA_INHERITS) ||
|
|
(securityMode == nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_DATA_IS_BLOCKED)) {
|
|
rv = DoSOPChecks(uri, loadInfo, aChannel);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
if ((securityMode == nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_INHERITS) ||
|
|
(securityMode == nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL)) {
|
|
if (NS_HasBeenCrossOrigin(aChannel)) {
|
|
loadInfo->MaybeIncreaseTainting(LoadTainting::Opaque);
|
|
}
|
|
// Please note that DoCheckLoadURIChecks should only be enforced for
|
|
// cross origin requests. If the flag SEC_REQUIRE_CORS_DATA_INHERITS is set
|
|
// within the loadInfo, then then CheckLoadURIWithPrincipal is performed
|
|
// within nsCorsListenerProxy
|
|
rv = DoCheckLoadURIChecks(uri, loadInfo);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
// TODO: Bug 1371237
|
|
// consider calling SetBlockedRequest in nsContentSecurityManager::CheckChannel
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
// ==== nsIContentSecurityManager implementation =====
|
|
|
|
NS_IMETHODIMP
|
|
nsContentSecurityManager::PerformSecurityCheck(nsIChannel* aChannel,
|
|
nsIStreamListener* aStreamListener,
|
|
nsIStreamListener** outStreamListener)
|
|
{
|
|
nsCOMPtr<nsIStreamListener> inAndOutListener = aStreamListener;
|
|
nsresult rv = doContentSecurityCheck(aChannel, inAndOutListener);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
inAndOutListener.forget(outStreamListener);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsContentSecurityManager::IsOriginPotentiallyTrustworthy(nsIPrincipal* aPrincipal,
|
|
bool* aIsTrustWorthy)
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
NS_ENSURE_ARG_POINTER(aPrincipal);
|
|
NS_ENSURE_ARG_POINTER(aIsTrustWorthy);
|
|
|
|
if (aPrincipal->GetIsSystemPrincipal()) {
|
|
*aIsTrustWorthy = true;
|
|
return NS_OK;
|
|
}
|
|
|
|
// The following implements:
|
|
// https://w3c.github.io/webappsec-secure-contexts/#is-origin-trustworthy
|
|
|
|
*aIsTrustWorthy = false;
|
|
|
|
if (aPrincipal->GetIsNullPrincipal()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
MOZ_ASSERT(aPrincipal->GetIsCodebasePrincipal(),
|
|
"Nobody is expected to call us with an nsIExpandedPrincipal");
|
|
|
|
nsCOMPtr<nsIURI> uri;
|
|
aPrincipal->GetURI(getter_AddRefs(uri));
|
|
|
|
nsAutoCString scheme;
|
|
nsresult rv = uri->GetScheme(scheme);
|
|
if (NS_FAILED(rv)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// Blobs are expected to inherit their principal so we don't expect to have
|
|
// a codebase principal with scheme 'blob' here. We can't assert that though
|
|
// since someone could mess with a non-blob URI to give it that scheme.
|
|
NS_WARNING_ASSERTION(!scheme.EqualsLiteral("blob"),
|
|
"IsOriginPotentiallyTrustworthy ignoring blob scheme");
|
|
|
|
// According to the specification, the user agent may choose to extend the
|
|
// trust to other, vendor-specific URL schemes. We use this for "resource:",
|
|
// which is technically a substituting protocol handler that is not limited to
|
|
// local resource mapping, but in practice is never mapped remotely as this
|
|
// would violate assumptions a lot of code makes.
|
|
if (scheme.EqualsLiteral("https") ||
|
|
scheme.EqualsLiteral("file") ||
|
|
scheme.EqualsLiteral("resource") ||
|
|
scheme.EqualsLiteral("app") ||
|
|
scheme.EqualsLiteral("moz-extension") ||
|
|
scheme.EqualsLiteral("wss")) {
|
|
*aIsTrustWorthy = true;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsAutoCString host;
|
|
rv = uri->GetHost(host);
|
|
if (NS_FAILED(rv)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (host.EqualsLiteral("127.0.0.1") ||
|
|
host.EqualsLiteral("localhost") ||
|
|
host.EqualsLiteral("::1")) {
|
|
*aIsTrustWorthy = true;
|
|
return NS_OK;
|
|
}
|
|
|
|
// If a host is not considered secure according to the default algorithm, then
|
|
// check to see if it has been whitelisted by the user. We only apply this
|
|
// whitelist for network resources, i.e., those with scheme "http" or "ws".
|
|
// The pref should contain a comma-separated list of hostnames.
|
|
if (scheme.EqualsLiteral("http") || scheme.EqualsLiteral("ws")) {
|
|
nsAutoCString whitelist;
|
|
nsresult rv =
|
|
Preferences::GetCString("dom.securecontext.whitelist", whitelist);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
nsCCharSeparatedTokenizer tokenizer(whitelist, ',');
|
|
while (tokenizer.hasMoreTokens()) {
|
|
const nsACString& allowedHost = tokenizer.nextToken();
|
|
if (host.Equals(allowedHost)) {
|
|
*aIsTrustWorthy = true;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|