void ObjectWrapper::Key::set(JSContext* cx, JS::HandleObject o, JS::HandleValue value) {
switch (_type) {
case Type::Field:
if (JS_SetProperty(cx, o, _field, value))
return;
break;
case Type::Index:
if (JS_SetElement(cx, o, _idx, value))
return;
break;
case Type::Id: {
JS::RootedId id(cx, _id);
if (JS_SetPropertyById(cx, o, id, value))
return;
break;
}
case Type::InternedString: {
InternedStringId id(cx, _internedString);
if (JS_SetPropertyById(cx, o, id, value))
return;
break;
}
}
throwCurrentJSException(cx, ErrorCodes::InternalError, "Failed to set value on a JSObject");
}
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);
}
jsval
to_js_object(ErlNifEnv* env, JSContext* cx, ERL_NIF_TERM list)
{
JSObject* ret;
jsval kval;
jsval vval;
jsid idp;
ERL_NIF_TERM head;
ERL_NIF_TERM tail;
const ERL_NIF_TERM* pair;
int arity;
ret = JS_NewObject(cx, NULL, NULL, NULL);
if(ret == NULL) return JSVAL_VOID;
if(enif_is_empty_list(env, list))
{
return OBJECT_TO_JSVAL(ret);
}
if(!enif_get_list_cell(env, list, &head, &tail))
{
return JSVAL_VOID;
}
do {
if(!enif_get_tuple(env, head, &arity, &pair))
{
return JSVAL_VOID;
}
if(arity != 2)
{
return JSVAL_VOID;
}
kval = to_js_key(env, cx, pair[0]);
if(kval == JSVAL_VOID) return JSVAL_VOID;
if(!JS_ValueToId(cx, kval, &idp)) return JSVAL_VOID;
vval = to_js(env, cx, pair[1]);
if(vval == JSVAL_VOID) return JSVAL_VOID;
if(!JS_SetPropertyById(cx, ret, idp, &vval))
{
return JSVAL_VOID;
}
} while(enif_get_list_cell(env, tail, &head, &tail));
return OBJECT_TO_JSVAL(ret);
}
// Clone a new value (and root it and add it to the mapping)
jsval Clone(jsval val)
{
if (JSVAL_IS_DOUBLE(val))
{
jsval rval;
CLONE_REQUIRE(JS_NewNumberValue(cxTo, JSVAL_TO_DOUBLE(val), &rval), L"JS_NewNumberValue");
m_RooterTo.Push(rval);
return rval;
}
if (JSVAL_IS_STRING(val))
{
size_t len;
const jschar* chars = JS_GetStringCharsAndLength(cxFrom, JSVAL_TO_STRING(val), &len);
CLONE_REQUIRE(chars, L"JS_GetStringCharsAndLength");
JSString* str = JS_NewUCStringCopyN(cxTo, chars, len);
CLONE_REQUIRE(str, L"JS_NewUCStringCopyN");
jsval rval = STRING_TO_JSVAL(str);
m_Mapping[JSVAL_TO_GCTHING(val)] = rval;
m_RooterTo.Push(rval);
return rval;
}
ENSURE(JSVAL_IS_OBJECT(val));
JSObject* newObj;
if (JS_IsArrayObject(cxFrom, JSVAL_TO_OBJECT(val)))
{
jsuint length;
CLONE_REQUIRE(JS_GetArrayLength(cxFrom, JSVAL_TO_OBJECT(val), &length), L"JS_GetArrayLength");
newObj = JS_NewArrayObject(cxTo, length, NULL);
CLONE_REQUIRE(newObj, L"JS_NewArrayObject");
}
else
{
newObj = JS_NewObject(cxTo, NULL, NULL, NULL);
CLONE_REQUIRE(newObj, L"JS_NewObject");
}
m_Mapping[JSVAL_TO_GCTHING(val)] = OBJECT_TO_JSVAL(newObj);
m_RooterTo.Push(newObj);
AutoJSIdArray ida (cxFrom, JS_Enumerate(cxFrom, JSVAL_TO_OBJECT(val)));
CLONE_REQUIRE(ida.get(), L"JS_Enumerate");
AutoGCRooter idaRooter(scriptInterfaceFrom);
idaRooter.Push(ida.get());
for (size_t i = 0; i < ida.length(); ++i)
{
jsid id = ida[i];
jsval idval, propval;
CLONE_REQUIRE(JS_IdToValue(cxFrom, id, &idval), L"JS_IdToValue");
CLONE_REQUIRE(JS_GetPropertyById(cxFrom, JSVAL_TO_OBJECT(val), id, &propval), L"JS_GetPropertyById");
jsval newPropval = GetOrClone(propval);
if (JSVAL_IS_INT(idval))
{
// int jsids are portable across runtimes
CLONE_REQUIRE(JS_SetPropertyById(cxTo, newObj, id, &newPropval), L"JS_SetPropertyById");
}
else if (JSVAL_IS_STRING(idval))
{
// string jsids are runtime-specific, so we need to copy the string content
JSString* idstr = JS_ValueToString(cxFrom, idval);
CLONE_REQUIRE(idstr, L"JS_ValueToString (id)");
size_t len;
const jschar* chars = JS_GetStringCharsAndLength(cxFrom, idstr, &len);
CLONE_REQUIRE(idstr, L"JS_GetStringCharsAndLength (id)");
CLONE_REQUIRE(JS_SetUCProperty(cxTo, newObj, chars, len, &newPropval), L"JS_SetUCProperty");
}
else
{
// this apparently could be an XML object; ignore it
}
}
return OBJECT_TO_JSVAL(newObj);
}
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);
}
