1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/xpconnect/src/XPCWrapper.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,98 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=8 sts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "xpcprivate.h"
1.11 +#include "XPCWrapper.h"
1.12 +#include "WrapperFactory.h"
1.13 +#include "AccessCheck.h"
1.14 +
1.15 +using namespace xpc;
1.16 +using namespace mozilla;
1.17 +
1.18 +namespace XPCNativeWrapper {
1.19 +
1.20 +static inline
1.21 +bool
1.22 +ThrowException(nsresult ex, JSContext *cx)
1.23 +{
1.24 + XPCThrower::Throw(ex, cx);
1.25 +
1.26 + return false;
1.27 +}
1.28 +
1.29 +static bool
1.30 +UnwrapNW(JSContext *cx, unsigned argc, jsval *vp)
1.31 +{
1.32 + JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
1.33 + if (args.length() != 1) {
1.34 + return ThrowException(NS_ERROR_XPC_NOT_ENOUGH_ARGS, cx);
1.35 + }
1.36 +
1.37 + JS::RootedValue v(cx, args[0]);
1.38 + if (!v.isObject() || !js::IsWrapper(&v.toObject())) {
1.39 + args.rval().set(v);
1.40 + return true;
1.41 + }
1.42 +
1.43 + if (AccessCheck::wrapperSubsumes(&v.toObject())) {
1.44 + bool ok = xpc::WrapperFactory::WaiveXrayAndWrap(cx, &v);
1.45 + NS_ENSURE_TRUE(ok, false);
1.46 + }
1.47 +
1.48 + args.rval().set(v);
1.49 + return true;
1.50 +}
1.51 +
1.52 +static bool
1.53 +XrayWrapperConstructor(JSContext *cx, unsigned argc, jsval *vp)
1.54 +{
1.55 + JS::CallArgs args = CallArgsFromVp(argc, vp);
1.56 + if (args.length() == 0) {
1.57 + return ThrowException(NS_ERROR_XPC_NOT_ENOUGH_ARGS, cx);
1.58 + }
1.59 +
1.60 + if (!args[0].isObject()) {
1.61 + args.rval().set(args[0]);
1.62 + return true;
1.63 + }
1.64 +
1.65 + args.rval().setObject(*js::UncheckedUnwrap(&args[0].toObject()));
1.66 + return JS_WrapValue(cx, args.rval());
1.67 +}
1.68 +// static
1.69 +bool
1.70 +AttachNewConstructorObject(JSContext *aCx, JS::HandleObject aGlobalObject)
1.71 +{
1.72 + // Pushing a JSContext calls ActivateDebugger which calls this function, so
1.73 + // we can't use an AutoJSContext here until JSD is gone.
1.74 + JSAutoCompartment ac(aCx, aGlobalObject);
1.75 + JSFunction *xpcnativewrapper =
1.76 + JS_DefineFunction(aCx, aGlobalObject, "XPCNativeWrapper",
1.77 + XrayWrapperConstructor, 1,
1.78 + JSPROP_READONLY | JSPROP_PERMANENT | JSFUN_STUB_GSOPS | JSFUN_CONSTRUCTOR);
1.79 + if (!xpcnativewrapper) {
1.80 + return false;
1.81 + }
1.82 + JS::RootedObject obj(aCx, JS_GetFunctionObject(xpcnativewrapper));
1.83 + return JS_DefineFunction(aCx, obj, "unwrap", UnwrapNW, 1,
1.84 + JSPROP_READONLY | JSPROP_PERMANENT) != nullptr;
1.85 +}
1.86 +
1.87 +} // namespace XPCNativeWrapper
1.88 +
1.89 +namespace XPCWrapper {
1.90 +
1.91 +JSObject *
1.92 +UnsafeUnwrapSecurityWrapper(JSObject *obj)
1.93 +{
1.94 + if (js::IsProxy(obj)) {
1.95 + return js::UncheckedUnwrap(obj);
1.96 + }
1.97 +
1.98 + return obj;
1.99 +}
1.100 +
1.101 +} // namespace XPCWrapper
