js/xpconnect/wrappers/ChromeObjectWrapper.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef __ChromeObjectWrapper_h__
   8 #define __ChromeObjectWrapper_h__
   9
  10 #include "mozilla/Attributes.h"
  11
  12 #include "FilteringWrapper.h"
  13
  14 namespace xpc {
  15
  16 struct OpaqueWithSilentFailing;
  17
  18 // When a vanilla chrome JS object is exposed to content, we use a wrapper that
  19 // fails silently on GET, ENUMERATE, and GET_PROPERTY_DESCRIPTOR for legacy
  20 // reasons. For extra security, we override the traps that allow content to pass
  21 // an object to chrome, and perform extra security checks on them.
  22 #define ChromeObjectWrapperBase \
  23   FilteringWrapper<js::CrossCompartmentSecurityWrapper, OpaqueWithSilentFailing>
  24
  25 class ChromeObjectWrapper : public ChromeObjectWrapperBase {
  26  public:
  27   constexpr ChromeObjectWrapper() : ChromeObjectWrapperBase(0) {}
  28
  29   virtual bool defineProperty(JSContext* cx, JS::Handle<JSObject*> wrapper,
  30                               JS::Handle<jsid> id,
  31                               JS::Handle<JS::PropertyDescriptor> desc,
  32                               JS::ObjectOpResult& result) const override;
  33   virtual bool set(JSContext* cx, JS::HandleObject wrapper, JS::HandleId id,
  34                    JS::HandleValue v, JS::HandleValue receiver,
  35                    JS::ObjectOpResult& result) const override;
  36
  37   static const ChromeObjectWrapper singleton;
  38 };
  39
  40 } /* namespace xpc */
  41
  42 #endif /* __ChromeObjectWrapper_h__ */