static JSBool
XPC_XOW_Call(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// Nothing to call.
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
nsresult rv = CanAccessWrapper(cx, wrappedObj, nsnull);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
// Can't call.
return ThrowException(rv, cx);
}
return JS_FALSE;
}
JSObject *callee = JSVAL_TO_OBJECT(argv[-2]);
NS_ASSERTION(GetWrappedObject(cx, callee), "How'd we get here?");
callee = GetWrappedObject(cx, callee);
if (!JS_CallFunctionValue(cx, obj, OBJECT_TO_JSVAL(callee), argc, argv,
rval)) {
return JS_FALSE;
}
return XPC_XOW_RewrapIfNeeded(cx, callee, rval);
}
static JSBool
XPC_COW_Equality(JSContext *cx, JSObject *obj, jsval v, JSBool *bp)
{
// Convert both sides to XPCWrappedNative and see if they match.
if (JSVAL_IS_PRIMITIVE(v)) {
*bp = JS_FALSE;
return JS_TRUE;
}
JSObject *test = GetWrappedJSObject(cx, JSVAL_TO_OBJECT(v));
obj = GetWrappedObject(cx, obj);
if (!obj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
XPCWrappedNative *other =
XPCWrappedNative::GetWrappedNativeOfJSObject(cx, test);
if (!other) {
*bp = JS_FALSE;
return JS_TRUE;
}
XPCWrappedNative *me = XPCWrappedNative::GetWrappedNativeOfJSObject(cx, obj);
obj = me->GetFlatJSObject();
test = other->GetFlatJSObject();
return ((JSExtendedClass *)STOBJ_GET_CLASS(obj))->
equality(cx, obj, OBJECT_TO_JSVAL(test), bp);
}
static JSBool
XPC_COW_NewResolve(JSContext *cx, JSObject *obj, jsval idval, uintN flags,
JSObject **objp)
{
obj = GetWrapper(obj);
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// No wrappedObj means that this is probably the prototype.
*objp = nsnull;
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
jsid id;
JSBool canTouch;
if (!JS_ValueToId(cx, idval, &id) ||
!CanTouchProperty(cx, obj, id, (flags & JSRESOLVE_ASSIGNING) != 0,
&canTouch)) {
return JS_FALSE;
}
if (!canTouch) {
return ThrowException(NS_ERROR_XPC_SECURITY_MANAGER_VETO, cx);
}
return XPCWrapper::NewResolve(cx, obj, JS_TRUE, wrappedObj, id, flags, objp);
}
static JSBool
XPC_XOW_Construct(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
JSObject *realObj = GetWrapper(JSVAL_TO_OBJECT(argv[-2]));
JSObject *wrappedObj = GetWrappedObject(cx, realObj);
if (!wrappedObj) {
// Nothing to construct.
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
nsresult rv = CanAccessWrapper(cx, wrappedObj, nsnull);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
// Can't construct.
return ThrowException(rv, cx);
}
return JS_FALSE;
}
if (!JS_CallFunctionValue(cx, obj, OBJECT_TO_JSVAL(wrappedObj), argc, argv,
rval)) {
return JS_FALSE;
}
return XPC_XOW_RewrapIfNeeded(cx, wrappedObj, rval);
}
static void
XPC_XOW_Finalize(JSContext *cx, JSObject *obj)
{
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
return;
}
// Get our scope.
jsval scopeVal;
if (!JS_GetReservedSlot(cx, obj, XPC_XOW_ScopeSlot, &scopeVal)) {
return;
}
// Now that we have our scope, see if it's going away. If it is,
// then our work here is going to be done when we destroy the scope
// entirely. Scope can be null if we're an enumerating XOW.
XPCWrappedNativeScope *scope = reinterpret_cast<XPCWrappedNativeScope *>
(JSVAL_TO_PRIVATE(scopeVal));
if (!scope) {
return;
}
// Remove ourselves from the map.
scope->GetWrapperMap()->Remove(wrappedObj);
}
static JSBool
XPC_XOW_Enumerate(JSContext *cx, JSObject *obj)
{
obj = GetWrapper(obj);
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// Nothing to enumerate.
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
nsresult rv = CanAccessWrapper(cx, wrappedObj, nsnull);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
// Can't enumerate on foreign objects.
return ThrowException(rv, cx);
}
return JS_FALSE;
}
return XPCWrapper::Enumerate(cx, obj, wrappedObj);
}
static JSBool
XPC_COW_Convert(JSContext *cx, JSObject *obj, JSType type, jsval *vp)
{
// Don't do any work to convert to object.
if (type == JSTYPE_OBJECT) {
*vp = OBJECT_TO_JSVAL(obj);
return JS_TRUE;
}
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// Converting the prototype to something.
*vp = OBJECT_TO_JSVAL(obj);
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
if (!STOBJ_GET_CLASS(wrappedObj)->convert(cx, wrappedObj, type, vp)) {
return JS_FALSE;
}
return XPC_COW_RewrapForContent(cx, obj, vp);
}
static JSBool
XPC_XOW_DelProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
nsresult rv = CanAccessWrapper(cx, wrappedObj, nsnull);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
// Can't delete properties on foreign objects.
return ThrowException(rv, cx);
}
return JS_FALSE;
}
// Same origin, pass this request along.
return XPCWrapper::DelProperty(cx, wrappedObj, id, vp);
}
static JSObject *
XPC_COW_Iterator(JSContext *cx, JSObject *obj, JSBool keysonly)
{
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
ThrowException(NS_ERROR_INVALID_ARG, cx);
return nsnull;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
ThrowException(NS_ERROR_FAILURE, cx);
return nsnull;
}
JSObject *wrapperIter = JS_NewObject(cx, &sXPC_COW_JSClass.base, nsnull,
JS_GetGlobalForObject(cx, obj));
if (!wrapperIter) {
return nsnull;
}
JSAutoTempValueRooter tvr(cx, OBJECT_TO_JSVAL(wrapperIter));
// Initialize our COW.
jsval v = OBJECT_TO_JSVAL(wrappedObj);
if (!JS_SetReservedSlot(cx, wrapperIter, XPCWrapper::sWrappedObjSlot, v) ||
!JS_SetReservedSlot(cx, wrapperIter, XPCWrapper::sFlagsSlot,
JSVAL_ZERO)) {
return nsnull;
}
return XPCWrapper::CreateIteratorObj(cx, wrapperIter, obj, wrappedObj,
keysonly);
}
static JSBool
WrapSameOriginProp(JSContext *cx, JSObject *outerObj, jsval *vp)
{
// Don't call XPC_XOW_RewrapIfNeeded for same origin properties. We only
// need to wrap window, document and location.
if (JSVAL_IS_PRIMITIVE(*vp)) {
return JS_TRUE;
}
JSObject *wrappedObj = JSVAL_TO_OBJECT(*vp);
JSClass *clasp = STOBJ_GET_CLASS(wrappedObj);
if (XPC_XOW_ClassNeedsXOW(clasp->name)) {
return XPC_XOW_WrapObject(cx, JS_GetGlobalForObject(cx, outerObj), vp);
}
// Check if wrappedObj is an XOW. If so, verify that it's from the
// right scope.
if (clasp == &sXPC_XOW_JSClass.base &&
STOBJ_GET_PARENT(wrappedObj) != STOBJ_GET_PARENT(outerObj)) {
*vp = OBJECT_TO_JSVAL(GetWrappedObject(cx, wrappedObj));
return XPC_XOW_WrapObject(cx, STOBJ_GET_PARENT(outerObj), vp);
}
return JS_TRUE;
}
static JSBool
XPC_XOW_FunctionWrapper(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
JSObject *wrappedObj, *outerObj = obj;
// Allow 'this' to be either an XOW, in which case we unwrap it.
// We disallow invalid XOWs that have no wrapped object. Otherwise,
// if it isn't an XOW, then pass it through as-is.
wrappedObj = GetWrapper(obj);
if (wrappedObj) {
wrappedObj = GetWrappedObject(cx, wrappedObj);
if (!wrappedObj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
} else {
wrappedObj = obj;
}
JSObject *funObj = JSVAL_TO_OBJECT(argv[-2]);
jsval funToCall;
if (!JS_GetReservedSlot(cx, funObj, XPCWrapper::eWrappedFunctionSlot,
&funToCall)) {
return JS_FALSE;
}
JSFunction *fun = JS_ValueToFunction(cx, funToCall);
if (!fun) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
nsresult rv = CanAccessWrapper(cx, JSVAL_TO_OBJECT(funToCall), nsnull);
if (NS_FAILED(rv) && rv != NS_ERROR_DOM_PROP_ACCESS_DENIED) {
return ThrowException(rv, cx);
}
#ifdef DEBUG
JSNative native = JS_GetFunctionNative(cx, fun);
NS_ASSERTION(native, "How'd we get here with a scripted function?");
#endif
if (!JS_CallFunctionValue(cx, wrappedObj, funToCall, argc, argv, rval)) {
return JS_FALSE;
}
if (NS_SUCCEEDED(rv)) {
return WrapSameOriginProp(cx, outerObj, rval);
}
return XPC_XOW_RewrapIfNeeded(cx, obj, rval);
}
static JSBool
XPC_COW_GetOrSetProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp,
JSBool isSet)
{
obj = GetWrapper(obj);
if (!obj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
AUTO_MARK_JSVAL(ccx, vp);
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
jsid interned_id;
if (!JS_ValueToId(cx, id, &interned_id)) {
return JS_FALSE;
}
if (interned_id == GetRTIdByIndex(cx, XPCJSRuntime::IDX_PROTO) ||
interned_id == GetRTIdByIndex(cx, XPCJSRuntime::IDX_PARENT) ||
interned_id == GetRTIdByIndex(cx, XPCJSRuntime::IDX_EXPOSEDPROPS)) {
// No getting or setting __proto__ or __parent__ on my object.
return ThrowException(NS_ERROR_INVALID_ARG, cx); // XXX better error message
}
JSBool canTouch;
if (!CanTouchProperty(cx, obj, interned_id, isSet, &canTouch)) {
return JS_FALSE;
}
if (!canTouch) {
return ThrowException(NS_ERROR_XPC_SECURITY_MANAGER_VETO, cx);
}
if (!XPC_COW_RewrapForChrome(cx, obj, vp)) {
return JS_FALSE;
}
JSBool ok = isSet
? JS_SetPropertyById(cx, wrappedObj, interned_id, vp)
: JS_GetPropertyById(cx, wrappedObj, interned_id, vp);
if (!ok) {
return JS_FALSE;
}
return XPC_COW_RewrapForContent(cx, obj, vp);
}
static JSBool
XPC_COW_CheckAccess(JSContext *cx, JSObject *obj, jsval prop, JSAccessMode mode,
jsval *vp)
{
// Simply forward checkAccess to our wrapped object. It's already expecting
// untrusted things to ask it about accesses.
uintN junk;
jsid id;
return JS_ValueToId(cx, prop, &id) &&
JS_CheckAccess(cx, GetWrappedObject(cx, obj), id, mode, vp, &junk);
}
static JSBool
XPC_XOW_HasInstance(JSContext *cx, JSObject *obj, jsval v, JSBool *bp)
{
JSObject *iface = GetWrappedObject(cx, obj);
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
nsresult rv = CanAccessWrapper(cx, iface, nsnull);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
// Don't do this test across origins.
return ThrowException(rv, cx);
}
return JS_FALSE;
}
JSClass *clasp = STOBJ_GET_CLASS(iface);
*bp = JS_FALSE;
if (!clasp->hasInstance) {
return JS_TRUE;
}
// Prematurely unwrap the left hand side.
if (!JSVAL_IS_PRIMITIVE(v)) {
JSObject *test = JSVAL_TO_OBJECT(v);
// GetWrappedObject does an instanceof check.
test = GetWrappedObject(cx, test);
if (test) {
v = OBJECT_TO_JSVAL(test);
}
}
return clasp->hasInstance(cx, iface, v, bp);
}
static JSObject *
XPC_XOW_Iterator(JSContext *cx, JSObject *obj, JSBool keysonly)
{
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
ThrowException(NS_ERROR_INVALID_ARG, cx);
return nsnull;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
ThrowException(NS_ERROR_FAILURE, cx);
return nsnull;
}
nsresult rv = CanAccessWrapper(cx, wrappedObj, nsnull);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
// Can't create iterators for foreign objects.
ThrowException(rv, cx);
return nsnull;
}
ThrowException(NS_ERROR_FAILURE, cx);
return nsnull;
}
JSObject *wrapperIter = JS_NewObject(cx, &sXPC_XOW_JSClass.base, nsnull,
JS_GetGlobalForObject(cx, obj));
if (!wrapperIter) {
return nsnull;
}
JSAutoTempValueRooter tvr(cx, OBJECT_TO_JSVAL(wrapperIter));
// Initialize our XOW.
jsval v = OBJECT_TO_JSVAL(wrappedObj);
if (!JS_SetReservedSlot(cx, wrapperIter, XPCWrapper::sWrappedObjSlot, v) ||
!JS_SetReservedSlot(cx, wrapperIter, XPCWrapper::sFlagsSlot,
JSVAL_ZERO) ||
!JS_SetReservedSlot(cx, wrapperIter, XPC_XOW_ScopeSlot,
PRIVATE_TO_JSVAL(nsnull))) {
return nsnull;
}
return XPCWrapper::CreateIteratorObj(cx, wrapperIter, obj, wrappedObj,
keysonly);
}
static JSBool
XPC_COW_DelProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
// Deleting a property is safe.
return XPCWrapper::DelProperty(cx, wrappedObj, id, vp);
}
static JSBool
XPC_XOW_toString(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
obj = GetWrapper(obj);
if (!obj) {
return ThrowException(NS_ERROR_UNEXPECTED, cx);
}
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// Someone's calling toString on our prototype.
NS_NAMED_LITERAL_CSTRING(protoString, "[object XPCCrossOriginWrapper]");
JSString *str =
JS_NewStringCopyN(cx, protoString.get(), protoString.Length());
if (!str) {
return JS_FALSE;
}
*rval = STRING_TO_JSVAL(str);
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
nsresult rv = CanAccessWrapper(cx, wrappedObj, nsnull);
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
nsIScriptSecurityManager *ssm = XPCWrapper::GetSecurityManager();
if (!ssm) {
return ThrowException(NS_ERROR_NOT_INITIALIZED, cx);
}
rv = ssm->CheckPropertyAccess(cx, wrappedObj,
STOBJ_GET_CLASS(wrappedObj)->name,
GetRTStringByIndex(cx, XPCJSRuntime::IDX_TO_STRING),
nsIXPCSecurityManager::ACCESS_GET_PROPERTY);
}
if (NS_FAILED(rv)) {
return JS_FALSE;
}
XPCWrappedNative *wn =
XPCWrappedNative::GetWrappedNativeOfJSObject(cx, wrappedObj);
return XPCWrapper::NativeToString(cx, wn, argc, argv, rval, JS_FALSE);
}
static JSBool
XPC_XOW_Convert(JSContext *cx, JSObject *obj, JSType type, jsval *vp)
{
// Don't do any work to convert to object.
if (type == JSTYPE_OBJECT) {
*vp = OBJECT_TO_JSVAL(obj);
return JS_TRUE;
}
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// Converting the prototype to something.
if (type == JSTYPE_STRING || type == JSTYPE_VOID) {
return XPC_XOW_toString(cx, obj, 0, nsnull, vp);
}
*vp = OBJECT_TO_JSVAL(obj);
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
// Note: JSTYPE_VOID and JSTYPE_STRING are equivalent.
nsresult rv = CanAccessWrapper(cx, wrappedObj, nsnull);
if (NS_FAILED(rv) &&
(rv != NS_ERROR_DOM_PROP_ACCESS_DENIED ||
(type != JSTYPE_STRING && type != JSTYPE_VOID))) {
// Ensure that we report some kind of error.
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
ThrowException(rv, cx);
}
return JS_FALSE;
}
if (!STOBJ_GET_CLASS(wrappedObj)->convert(cx, wrappedObj, type, vp)) {
return JS_FALSE;
}
return NS_SUCCEEDED(rv)
? WrapSameOriginProp(cx, obj, vp)
: XPC_XOW_RewrapIfNeeded(cx, obj, vp);
}
static JSBool
XPC_COW_Enumerate(JSContext *cx, JSObject *obj)
{
obj = GetWrapper(obj);
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// Nothing to enumerate.
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
return XPCWrapper::Enumerate(cx, obj, wrappedObj);
}
static JSBool
XPC_COW_AddProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
obj = GetWrapper(obj);
jsval resolving;
if (!JS_GetReservedSlot(cx, obj, XPCWrapper::sFlagsSlot, &resolving)) {
return JS_FALSE;
}
if (HAS_FLAGS(resolving, FLAG_RESOLVING)) {
// Allow us to define a property on ourselves.
return JS_TRUE;
}
// Someone's adding a property to us. We need to protect ourselves from
// getters and setters.
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
jsid interned_id;
JSPropertyDescriptor desc;
if (!JS_ValueToId(cx, id, &interned_id) ||
!XPCWrapper::GetPropertyAttrs(cx, obj, interned_id, JSRESOLVE_QUALIFIED,
JS_TRUE, &desc)) {
return JS_FALSE;
}
NS_ASSERTION(desc.obj == obj, "The JS engine lies!");
if (desc.attrs & (JSPROP_GETTER | JSPROP_SETTER)) {
// Only chrome is allowed to add getters or setters to our object.
if (!AllowedToAct(cx, id)) {
return JS_FALSE;
}
}
return XPC_COW_RewrapForChrome(cx, obj, vp) &&
JS_DefinePropertyById(cx, wrappedObj, interned_id, *vp,
desc.getter, desc.setter, desc.attrs);
}
static JSBool
XPC_XOW_AddProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
// All AddProperty needs to do is pass on addProperty requests to
// same-origin objects, and throw for all else.
obj = GetWrapper(obj);
jsval resolving;
if (!JS_GetReservedSlot(cx, obj, XPCWrapper::sFlagsSlot, &resolving)) {
return JS_FALSE;
}
if (HAS_FLAGS(resolving, FLAG_RESOLVING)) {
// Allow us to define a property on ourselves.
return JS_TRUE;
}
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
JSBool privilegeEnabled = JS_FALSE;
nsresult rv = CanAccessWrapper(cx, wrappedObj, &privilegeEnabled);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
// Can't override properties on foreign objects.
return ThrowException(rv, cx);
}
return JS_FALSE;
}
// Same origin, pass this request along.
return XPCWrapper::AddProperty(cx, obj, JS_TRUE, wrappedObj, id, vp);
}
static JSBool
XPC_COW_FunctionWrapper(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
JSObject *wrappedObj;
// Allow 'this' to be either a COW, in which case we unwrap it or something
// that isn't a COW. We disallow invalid COWs that have no wrapped object.
wrappedObj = GetWrapper(obj);
if (wrappedObj) {
wrappedObj = GetWrappedObject(cx, wrappedObj);
if (!wrappedObj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
} else {
wrappedObj = obj;
}
jsval funToCall;
if (!JS_GetReservedSlot(cx, JSVAL_TO_OBJECT(argv[-2]),
XPCWrapper::eWrappedFunctionSlot, &funToCall)) {
return JS_FALSE;
}
for (uintN i = 0; i < argc; ++i) {
if (!XPC_COW_RewrapForChrome(cx, obj, &argv[i])) {
return JS_FALSE;
}
}
if (!JS_CallFunctionValue(cx, wrappedObj, funToCall, argc, argv, rval)) {
return JS_FALSE;
}
return XPC_COW_RewrapForContent(cx, obj, rval);
}
JSBool
XPC_XOW_RewrapIfNeeded(JSContext *cx, JSObject *outerObj, jsval *vp)
{
// Don't need to wrap primitive values.
if (JSVAL_IS_PRIMITIVE(*vp)) {
return JS_TRUE;
}
JSObject *obj = JSVAL_TO_OBJECT(*vp);
if (JS_ObjectIsFunction(cx, obj)) {
return XPC_XOW_WrapFunction(cx, outerObj, obj, vp);
}
XPCWrappedNative *wn = nsnull;
if (STOBJ_GET_CLASS(obj) == &sXPC_XOW_JSClass.base &&
STOBJ_GET_PARENT(outerObj) != STOBJ_GET_PARENT(obj)) {
*vp = OBJECT_TO_JSVAL(GetWrappedObject(cx, obj));
} else if (!(wn = XPCWrappedNative::GetAndMorphWrappedNativeOfJSObject(cx, obj))) {
return JS_TRUE;
}
return XPC_XOW_WrapObject(cx, JS_GetGlobalForObject(cx, outerObj), vp, wn);
}
JSBool
RewrapIfNeeded(JSContext *cx, JSObject *outerObj, jsval *vp)
{
// Don't need to wrap primitive values.
if (JSVAL_IS_PRIMITIVE(*vp)) {
return JS_TRUE;
}
JSObject *obj = JSVAL_TO_OBJECT(*vp);
if (JS_ObjectIsFunction(cx, obj)) {
return WrapFunction(cx, outerObj, obj, vp);
}
XPCWrappedNative *wn = nsnull;
if (obj->getClass() == &XOWClass &&
outerObj->getParent() != obj->getParent()) {
*vp = OBJECT_TO_JSVAL(GetWrappedObject(cx, obj));
} else if (!(wn = XPCWrappedNative::GetAndMorphWrappedNativeOfJSObject(cx, obj))) {
return JS_TRUE;
}
return WrapObject(cx, JS_GetGlobalForObject(cx, outerObj), vp, wn);
}
static JSObject *
XPC_COW_WrappedObject(JSContext *cx, JSObject *obj)
{
return GetWrappedObject(cx, obj);
}
static JSBool
XPC_XOW_GetOrSetProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp,
JSBool isSet)
{
if (id == GetRTStringByIndex(cx, XPCJSRuntime::IDX_TO_STRING)) {
return JS_TRUE;
}
// Don't do anything if we already resolved to a wrapped function in
// NewResolve. In practice, this means that this is a wrapped eval
// function.
jsval v = *vp;
if (!JSVAL_IS_PRIMITIVE(v) &&
JS_ObjectIsFunction(cx, JSVAL_TO_OBJECT(v)) &&
JS_GetFunctionNative(cx, JS_ValueToFunction(cx, v)) ==
XPC_XOW_FunctionWrapper) {
return JS_TRUE;
}
JSObject *origObj = obj;
obj = GetWrapper(obj);
if (!obj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
AUTO_MARK_JSVAL(ccx, vp);
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
JSBool privilegeEnabled;
nsresult rv = CanAccessWrapper(cx, wrappedObj, &privilegeEnabled);
if (NS_FAILED(rv)) {
if (rv != NS_ERROR_DOM_PROP_ACCESS_DENIED) {
return JS_FALSE;
}
// This is a request to get a property across origins. We need to
// determine if this property is allAccess. If it is, then we need to
// actually get the property. If not, we simply need to throw an
// exception.
XPCWrappedNative *wn =
XPCWrappedNative::GetWrappedNativeOfJSObject(cx, wrappedObj);
NS_ASSERTION(wn, "How did we wrap a non-WrappedNative?");
if (!IsValFrame(wrappedObj, id, wn)) {
nsIScriptSecurityManager *ssm = XPCWrapper::GetSecurityManager();
if (!ssm) {
return ThrowException(NS_ERROR_NOT_INITIALIZED, cx);
}
rv = ssm->CheckPropertyAccess(cx, wrappedObj,
STOBJ_GET_CLASS(wrappedObj)->name,
id, isSet ? XPCWrapper::sSecMgrSetProp
: XPCWrapper::sSecMgrGetProp);
if (NS_FAILED(rv)) {
// The security manager threw an exception for us.
return JS_FALSE;
}
}
return XPCWrapper::GetOrSetNativeProperty(cx, obj, wn, id, vp, isSet,
JS_FALSE);
}
JSObject *proto = nsnull; // Initialize this to quiet GCC.
JSBool checkProto =
(isSet && id == GetRTStringByIndex(cx, XPCJSRuntime::IDX_PROTO));
if (checkProto) {
proto = STOBJ_GET_PROTO(wrappedObj);
}
// Same origin, pass this request along as though nothing interesting
// happened.
jsid asId;
if (!JS_ValueToId(cx, id, &asId)) {
return JS_FALSE;
}
JSBool ok = isSet
? JS_SetPropertyById(cx, wrappedObj, asId, vp)
: JS_GetPropertyById(cx, wrappedObj, asId, vp);
if (!ok) {
return JS_FALSE;
}
if (checkProto) {
JSObject *newProto = STOBJ_GET_PROTO(wrappedObj);
// If code is trying to set obj.__proto__ and we're on obj's
// prototype chain, then the JS_GetPropertyById above will do the
// wrong thing if wrappedObj still delegates to Object.prototype.
// However, it's hard to figure out if wrappedObj still does
// delegate to Object.prototype so check to see if proto changed as a
// result of setting __proto__.
if (origObj != obj) {
// Undo the damage.
if (!JS_SetPrototype(cx, wrappedObj, proto) ||
!JS_SetPrototype(cx, origObj, newProto)) {
return JS_FALSE;
}
} else if (newProto) {
// __proto__ setting is a bad hack, people shouldn't do it. In
// this case we're setting the direct prototype of a XOW object,
// in the interests of sanity only allow it to be set to null in
// this case.
JS_SetPrototype(cx, wrappedObj, proto);
JS_ReportError(cx, "invalid __proto__ value (can only be set to null)");
return JS_FALSE;
}
}
return WrapSameOriginProp(cx, obj, vp);
}
static JSBool
XPC_XOW_NewResolve(JSContext *cx, JSObject *obj, jsval id, uintN flags,
JSObject **objp)
{
obj = GetWrapper(obj);
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// No wrappedObj means that this is probably the prototype.
*objp = nsnull;
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
JSBool privilegeEnabled;
nsresult rv = CanAccessWrapper(cx, wrappedObj, &privilegeEnabled);
if (NS_FAILED(rv)) {
if (rv != NS_ERROR_DOM_PROP_ACCESS_DENIED) {
return JS_FALSE;
}
// We're dealing with a cross-origin lookup. Ensure that we're allowed to
// resolve this property and resolve it if so. Otherwise, we deny access
// and throw a security error. Note that this code does not actually check
// to see if the property exists, that's dealt with below.
XPCWrappedNative *wn =
XPCWrappedNative::GetWrappedNativeOfJSObject(cx, wrappedObj);
NS_ASSERTION(wn, "How did we wrap a non-WrappedNative?");
if (!IsValFrame(wrappedObj, id, wn)) {
nsIScriptSecurityManager *ssm = XPCWrapper::GetSecurityManager();
if (!ssm) {
return ThrowException(NS_ERROR_NOT_INITIALIZED, cx);
}
PRUint32 action = (flags & JSRESOLVE_ASSIGNING)
? XPCWrapper::sSecMgrSetProp
: XPCWrapper::sSecMgrGetProp;
rv = ssm->CheckPropertyAccess(cx, wrappedObj,
STOBJ_GET_CLASS(wrappedObj)->name,
id, action);
if (NS_FAILED(rv)) {
// The security manager threw an exception for us.
return JS_FALSE;
}
}
// We're out! We're allowed to resolve this property.
return XPCWrapper::ResolveNativeProperty(cx, obj, wrappedObj, wn, id,
flags, objp, JS_FALSE);
}
if (privilegeEnabled && !(obj = GetUXPCObject(cx, obj))) {
return JS_FALSE;
}
if (id == GetRTStringByIndex(cx, XPCJSRuntime::IDX_TO_STRING)) {
jsval oldSlotVal;
if (!JS_GetReservedSlot(cx, obj, XPCWrapper::sFlagsSlot, &oldSlotVal) ||
!JS_SetReservedSlot(cx, obj, XPCWrapper::sFlagsSlot,
INT_TO_JSVAL(JSVAL_TO_INT(oldSlotVal) |
FLAG_RESOLVING))) {
return JS_FALSE;
}
JSBool ok = JS_DefineFunction(cx, obj, "toString",
XPC_XOW_toString, 0, 0) != nsnull;
JS_SetReservedSlot(cx, obj, XPCWrapper::sFlagsSlot, oldSlotVal);
if (ok) {
*objp = obj;
}
return ok;
}
return XPCWrapper::NewResolve(cx, obj, JS_TRUE, wrappedObj, id, flags, objp);
}
