Move securityCheck out of V8WrapperInstantiationScope

third_party/WebKit/Source/bindings/core/v8/BindingSecurity.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "bindings/core/v8/BindingSecurity.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/V8Binding.h"
+#include "bindings/core/v8/V8Location.h"
+#include "bindings/core/v8/WrapperCreationSecurityCheck.h"
 #include "core/dom/Document.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Location.h"
 #include "core/frame/Settings.h"
 #include "core/html/HTMLFrameElementBase.h"
 #include "core/workers/MainThreadWorkletGlobalScope.h"
 #include "platform/weborigin/SecurityOrigin.h"
 
 namespace blink {
 
 namespace {
 
 bool CanAccessFrameInternal(const LocalDOMWindow* accessing_window,
                             const SecurityOrigin* target_frame_origin,
                             const DOMWindow* target_window) {
   SECURITY_CHECK(!(target_window && target_window->GetFrame()) ||
                  target_window == target_window->GetFrame()->DomWindow());
 
-  // It's important to check that targetWindow is a LocalDOMWindow: it's
+  // It's important to check that target_window is a LocalDOMWindow: it's
   // possible for a remote frame and local frame to have the same security
   // origin, depending on the model being used to allocate Frames between
   // processes. See https://crbug.com/601629.
   if (!(accessing_window && target_window && target_window->IsLocalDOMWindow()))
     return false;
 
   const SecurityOrigin* accessing_origin =
       accessing_window->document()->GetSecurityOrigin();
   if (!accessing_origin->CanAccess(target_frame_origin))
     return false;
@@ skipping 192 matching lines @@
     return false;
 
   // Note that there is no need to call back
   // FrameLoader::didAccessInitialDocument() because |targetWindow| must be
   // a child window inside iframe or frame and it doesn't have a URL bar,
   // so there is no need to worry about URL spoofing.
 
   return true;
 }
 
+bool BindingSecurity::ShouldAllowAccessToCreationContext(
+    v8::Local<v8::Context> creation_context,
+    const WrapperTypeInfo* type) {
+  // According to
+  // https://html.spec.whatwg.org/multipage/browsers.html#security-location,
+  // cross-origin script access to a few properties of Location is allowed.
+  // Location already implements the necessary security checks.
+  if (type->Equals(&V8Location::wrapperTypeInfo))
+    return true;
+
+  v8::Isolate* isolate = creation_context->GetIsolate();
+  LocalFrame* frame = ToLocalFrameIfNotDetached(creation_context);
+  ExceptionState exception_state(isolate, ExceptionState::kConstructionContext,
+                                 type->interface_name);
+  if (!frame) {
+    // Sandbox detached frames - they can't create cross origin objects.
+    LocalDOMWindow* calling_window = CurrentDOMWindow(isolate);
+    LocalDOMWindow* target_window = ToLocalDOMWindow(creation_context);
+
+    return ShouldAllowAccessToDetachedWindow(calling_window, target_window,
+                                             exception_state);
+  }
+  const DOMWrapperWorld& current_world =
+      DOMWrapperWorld::World(isolate->GetCurrentContext());
+  CHECK_EQ(current_world.GetWorldId(),
+           DOMWrapperWorld::World(creation_context).GetWorldId());
+
+  return !current_world.IsMainWorld() ||
+         ShouldAllowAccessToFrame(CurrentDOMWindow(isolate), frame,
+                                  exception_state);
+}
+
+void BindingSecurity::RethrowCrossContextException(
+    v8::Local<v8::Context> creation_context,
+    const WrapperTypeInfo* type,
+    v8::Local<v8::Value> cross_context_exception) {
+  DCHECK(!cross_context_exception.IsEmpty());
+  v8::Isolate* isolate = creation_context->GetIsolate();
+  ExceptionState exception_state(isolate, ExceptionState::kConstructionContext,
+                                 type->interface_name);
+  if (type->Equals(&V8Location::wrapperTypeInfo)) {
+    // Convert cross-context exception to security error
+    LocalDOMWindow* calling_window = CurrentDOMWindow(isolate);
+    LocalDOMWindow* target_window = ToLocalDOMWindow(creation_context);
+    exception_state.ThrowSecurityError(
+        target_window->SanitizedCrossDomainAccessErrorMessage(calling_window),
+        target_window->CrossDomainAccessErrorMessage(calling_window));
+    return;
+  }
+  exception_state.RethrowV8Exception(cross_context_exception);
+}
+
+void BindingSecurity::InitWrapperCreationSecurityCheck() {
+  WrapperCreationSecurityCheck::SetSecurityCheckFunction(
+      &ShouldAllowAccessToCreationContext);
+  WrapperCreationSecurityCheck::SetRethrowExceptionFunction(
+      &RethrowCrossContextException);
+}
+
 void BindingSecurity::FailedAccessCheckFor(v8::Isolate* isolate,
                                            const Frame* target) {
   // TODO(dcheng): See if this null check can be removed or hoisted to a
   // different location.
   if (!target)
     return;
 
   DOMWindow* target_window = target->DomWindow();
 
   // TODO(dcheng): Add ContextType, interface name, and property name as
   // arguments, so the generated exception can be more descriptive.
   ExceptionState exception_state(isolate, ExceptionState::kUnknownContext,
                                  nullptr, nullptr);
   exception_state.ThrowSecurityError(
       target_window->SanitizedCrossDomainAccessErrorMessage(
           CurrentDOMWindow(isolate)),
       target_window->CrossDomainAccessErrorMessage(CurrentDOMWindow(isolate)));
 }
 
 }  // namespace blink