ChromeObjectWrapper.h

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/* -*- 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/. */

#ifndef __ChromeObjectWrapper_h__

#define __ChromeObjectWrapper_h__

#include "mozilla/Attributes.h"

#include "FilteringWrapper.h"

namespace xpc {

struct OpaqueWithSilentFailing;

// When a vanilla chrome JS object is exposed to content, we use a wrapper that

// fails silently on GET, ENUMERATE, and GET_PROPERTY_DESCRIPTOR for legacy

// reasons. For extra security, we override the traps that allow content to pass

// an object to chrome, and perform extra security checks on them.

#define ChromeObjectWrapperBase \

  FilteringWrapper<js::CrossCompartmentSecurityWrapper, OpaqueWithSilentFailing>

class ChromeObjectWrapper : public ChromeObjectWrapperBase {

 public:

  constexpr ChromeObjectWrapper() : ChromeObjectWrapperBase(0) {}

  virtual bool defineProperty(JSContext* cx, JS::Handle<JSObject*> wrapper,

                              JS::Handle<jsid> id,

                              JS::Handle<JS::PropertyDescriptor> desc,

                              JS::ObjectOpResult& result) const override;

  virtual bool set(JSContext* cx, JS::HandleObject wrapper, JS::HandleId id,

                   JS::HandleValue v, JS::HandleValue receiver,

                   JS::ObjectOpResult& result) const override;

  static const ChromeObjectWrapper singleton;

};

} /* namespace xpc */

#endif /* __ChromeObjectWrapper_h__ */