Block execution of failed 'crossorigin' <script>s.

Source/core/fetch/ResourceFetcher.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
     Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
@@ skipping 260 matching lines @@
     options.synchronousPolicy = RequestSynchronously;
     request.setOptions(options);
     return requestResource(Resource::Raw, request);
 }
 
 ResourcePtr<ImageResource> ResourceFetcher::fetchImage(FetchRequest& request)
 {
     if (Frame* f = frame()) {
         if (f->document()->pageDismissalEventBeingDispatched() != Document::NoDismissal) {
             KURL requestURL = request.resourceRequest().url();
-            if (requestURL.isValid() && canRequest(Resource::Image, requestURL, request.options(), request.forPreload()))
+            if (requestURL.isValid() && canRequest(Resource::Image, requestURL, request.options(), request.forPreload(), request.originRestriction()))
                 PingLoader::loadImage(f, requestURL);
             return 0;
         }
     }
 
     if (request.resourceRequest().url().protocolIsData())
         preCacheDataURIImage(request);
 
     request.setDefer(clientDefersImage(request.resourceRequest().url()) ? FetchRequest::DeferredByClient : FetchRequest::NoDefer);
     return static_cast<ImageResource*>(requestResource(Resource::Image, request).get());
@@ skipping 34 matching lines @@
 ResourcePtr<CSSStyleSheetResource> ResourceFetcher::fetchUserCSSStyleSheet(FetchRequest& request)
 {
     KURL url = MemoryCache::removeFragmentIdentifierIfNeeded(request.resourceRequest().url());
 
     if (Resource* existing = memoryCache()->resourceForURL(url)) {
         if (existing->type() == Resource::CSSStyleSheet)
             return static_cast<CSSStyleSheetResource*>(existing);
         memoryCache()->remove(existing);
     }
 
-    request.setOptions(ResourceLoaderOptions(DoNotSendCallbacks, SniffContent, BufferData, AllowStoredCredentials, ClientRequestedCredentials, AskClientForCrossOriginCredentials, SkipSecurityCheck, CheckContentSecurityPolicy, UseDefaultOriginRestrictionsForType, DocumentContext));
+    request.setOptions(ResourceLoaderOptions(DoNotSendCallbacks, SniffContent, BufferData, AllowStoredCredentials, ClientRequestedCredentials, AskClientForCrossOriginCredentials, SkipSecurityCheck, CheckContentSecurityPolicy, DocumentContext));
     return static_cast<CSSStyleSheetResource*>(requestResource(Resource::CSSStyleSheet, request).get());
 }
 
 ResourcePtr<ScriptResource> ResourceFetcher::fetchScript(FetchRequest& request)
 {
     return static_cast<ScriptResource*>(requestResource(Resource::Script, request).get());
 }
 
 ResourcePtr<XSLStyleSheetResource> ResourceFetcher::fetchXSLStyleSheet(FetchRequest& request)
 {
@@ skipping 68 matching lines @@
             Frame* top = f->tree().top();
             if (!top->loader().mixedContentChecker()->canDisplayInsecureContent(top->document()->securityOrigin(), url))
                 return false;
         }
     } else {
         ASSERT(treatment == TreatAsAlwaysAllowedContent);
     }
     return true;
 }
 
-bool ResourceFetcher::canRequest(Resource::Type type, const KURL& url, const ResourceLoaderOptions& options, bool forPreload)
+bool ResourceFetcher::canRequest(Resource::Type type, const KURL& url, const ResourceLoaderOptions& options, bool forPreload, FetchRequest::OriginRestriction originRestriction)
 {
     if (document() && !document()->securityOrigin()->canDisplay(url)) {
         if (!forPreload)
             context().reportLocalLoadFailed(url);
         LOG(ResourceLoading, "ResourceFetcher::requestResource URL was not allowed by SecurityOrigin::canDisplay");
         return 0;
     }
 
     // FIXME: Convert this to check the isolated world's Content Security Policy once webkit.org/b/104520 is solved.
     bool shouldBypassMainWorldContentSecurityPolicy = (frame() && frame()->script().shouldBypassMainWorldContentSecurityPolicy()) || (options.contentSecurityPolicyOption == DoNotCheckContentSecurityPolicy);
 
     // Some types of resources can be loaded only from the same origin. Other
     // types of resources, like Images, Scripts, and CSS, can be loaded from
     // any URL.
     switch (type) {
     case Resource::MainResource:
     case Resource::Image:
     case Resource::CSSStyleSheet:
     case Resource::Script:
     case Resource::Font:
     case Resource::Raw:
     case Resource::LinkPrefetch:
     case Resource::LinkSubresource:
     case Resource::TextTrack:
     case Resource::Shader:
     case Resource::ImportResource:
         // By default these types of resources can be loaded from any origin.
         // FIXME: Are we sure about Resource::Font?
-        if (options.requestOriginPolicy == RestrictToSameOrigin && !m_document->securityOrigin()->canRequest(url)) {
+        if (originRestriction == FetchRequest::RestrictToSameOrigin && !m_document->securityOrigin()->canRequest(url)) {
             printAccessDeniedMessage(url);
             return false;
         }
         break;
     case Resource::XSLStyleSheet:
         ASSERT(RuntimeEnabledFeatures::xsltEnabled());
     case Resource::SVGDocument:
         if (!m_document->securityOrigin()->canRequest(url)) {
             printAccessDeniedMessage(url);
             return false;
@@ skipping 51 matching lines @@
     // folks block insecure content with a CSP policy, they don't get a warning.
     // They'll still get a warning in the console about CSP blocking the load.
 
     // FIXME: Should we consider forPreload here?
     if (!checkInsecureContent(type, url, options.mixedContentBlockingTreatment))
         return false;
 
     return true;
 }
 
-bool ResourceFetcher::canAccess(Resource* resource)
+bool ResourceFetcher::canAccess(Resource* resource, CORSEnabled corsEnabled, FetchRequest::OriginRestriction originRestriction)
 {
     // Redirects can change the response URL different from one of request.
-    if (!canRequest(resource->type(), resource->response().url(), resource->options(), false))
+    if (!canRequest(resource->type(), resource->response().url(), resource->options(), false, originRestriction))
         return false;
 
     String error;
     switch (resource->type()) {
     case Resource::Script:
     case Resource::ImportResource:
-        if (resource->options().requestOriginPolicy == PotentiallyCrossOriginEnabled
+        if (corsEnabled == PotentiallyCORSEnabled
             && !m_document->securityOrigin()->canRequest(resource->response().url())
             && !resource->passesAccessControlCheck(m_document->securityOrigin(), error)) {
             if (frame() && frame()->document())
                 frame()->document()->addConsoleMessage(JSMessageSource, ErrorMessageLevel, "Script from origin '" + SecurityOrigin::create(resource->response().url())->toString() + "' has been blocked from loading by Cross-Origin Resource Sharing policy: " + error);
             return false;
         }
 
         break;
     default:
         ASSERT_NOT_REACHED(); // FIXME: generalize to non-script resources
@@ skipping 30 matching lines @@
     KURL url = request.resourceRequest().url();
 
     LOG(ResourceLoading, "ResourceFetcher::requestResource '%s', charset '%s', priority=%d, forPreload=%u, type=%s", url.elidedString().latin1().data(), request.charset().latin1().data(), request.priority(), request.forPreload(), ResourceTypeName(type));
 
     // If only the fragment identifiers differ, it is the same resource.
     url = MemoryCache::removeFragmentIdentifierIfNeeded(url);
 
     if (!url.isValid())
         return 0;
 
-    if (!canRequest(type, url, request.options(), request.forPreload()))
+    if (!canRequest(type, url, request.options(), request.forPreload(), request.originRestriction()))
         return 0;
 
     if (Frame* f = frame())
         f->loader().client()->dispatchWillRequestResource(&request);
 
     // See if we can use an existing resource from the cache.
     ResourcePtr<Resource> resource = memoryCache()->resourceForURL(url);
 
     const RevalidationPolicy policy = determineRevalidationPolicy(type, request.mutableResourceRequest(), request.forPreload(), resource.get(), request.defer());
     switch (policy) {
@@ skipping 650 matching lines @@
     return false;
 }
 
 bool ResourceFetcher::isLoadedBy(ResourceLoaderHost* possibleOwner) const
 {
     return this == possibleOwner;
 }
 
 bool ResourceFetcher::shouldRequest(Resource* resource, const ResourceRequest& request, const ResourceLoaderOptions& options)
 {
-    if (!canRequest(resource->type(), request.url(), options))
+    if (!canRequest(resource->type(), request.url(), options, false, FetchRequest::UseDefaultOriginRestrictionForType))
         return false;
     if (resource->type() == Resource::Image && shouldDeferImageLoad(request.url()))
         return false;
     return true;
 }
 
 void ResourceFetcher::refResourceLoaderHost()
 {
     ref();
 }
@@ skipping 47 matching lines @@
         printf("SCRIPTS: %d (%d hits, hit rate %d%%)\n", scripts, scripts - scriptMisses, (scripts - scriptMisses) * 100 / scripts);
     if (stylesheets)
         printf("STYLESHEETS: %d (%d hits, hit rate %d%%)\n", stylesheets, stylesheets - stylesheetMisses, (stylesheets - stylesheetMisses) * 100 / stylesheets);
     if (images)
         printf("IMAGES:  %d (%d hits, hit rate %d%%)\n", images, images - imageMisses, (images - imageMisses) * 100 / images);
 }
 #endif
 
 const ResourceLoaderOptions& ResourceFetcher::defaultResourceOptions()
 {
-    DEFINE_STATIC_LOCAL(ResourceLoaderOptions, options, (SendCallbacks, SniffContent, BufferData, AllowStoredCredentials, ClientRequestedCredentials, AskClientForCrossOriginCredentials, DoSecurityCheck, CheckContentSecurityPolicy, UseDefaultOriginRestrictionsForType, DocumentContext));
+    DEFINE_STATIC_LOCAL(ResourceLoaderOptions, options, (SendCallbacks, SniffContent, BufferData, AllowStoredCredentials, ClientRequestedCredentials, AskClientForCrossOriginCredentials, DoSecurityCheck, CheckContentSecurityPolicy, DocumentContext));
     return options;
 }
 
 }