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/*
* Copyright (C) 2000 Harri Porten (porten@kde.org)
* Copyright (C) 2006 Jon Shier (jshier@iastate.edu)
* Copyright (C) 2003-2022 Apple Inc. All rights reseved.
* Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#include "config.h"
#include "JSLocation.h"
#include "JSDOMBinding.h"
#include "JSDOMBindingSecurity.h"
#include "JSDOMExceptionHandling.h"
#include "JSDOMWindowCustom.h"
#include "WebCoreJSClientData.h"
#include <JavaScriptCore/JSFunction.h>
#include <JavaScriptCore/Lookup.h>
#include <wtf/RuntimeApplicationChecks.h>
namespace WebCore {
using namespace JSC;
static bool getOwnPropertySlotCommon(JSLocation& thisObject, JSGlobalObject& lexicalGlobalObject, PropertyName propertyName, PropertySlot& slot)
{
VM& vm = lexicalGlobalObject.vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto* window = thisObject.wrapped().window();
// When accessing Location cross-domain, functions are always the native built-in ones.
// See JSDOMWindow::getOwnPropertySlotDelegate for additional details.
// Our custom code is only needed to implement the Window cross-domain scheme, so if access is
// allowed, return false so the normal lookup will take place.
String message;
if (BindingSecurity::shouldAllowAccessToDOMWindow(lexicalGlobalObject, window, message))
return false;
// https://html.spec.whatwg.org/#crossorigingetownpropertyhelper-(-o,-p-)
// We only allow access to Location.replace() cross origin.
if (propertyName == vm.propertyNames->replace) {
auto* entry = JSLocation::info()->staticPropHashTable->entry(propertyName);
auto* jsFunction = thisObject.globalObject()->createCrossOriginFunction(&lexicalGlobalObject, propertyName, entry->function(), entry->functionLength());
slot.setValue(&thisObject, PropertyAttribute::ReadOnly | PropertyAttribute::DontEnum, jsFunction);
return true;
}
// Getting location.href cross origin needs to throw. However, getOwnPropertyDescriptor() needs to return
// a descriptor that has a setter but no getter.
if (slot.internalMethodType() == PropertySlot::InternalMethodType::GetOwnProperty && propertyName == builtinNames(vm).hrefPublicName()) {
auto* entry = JSLocation::info()->staticPropHashTable->entry(propertyName);
auto* getterSetter = thisObject.globalObject()->createCrossOriginGetterSetter(&lexicalGlobalObject, propertyName, nullptr, entry->propertyPutter());
slot.setGetterSlot(&thisObject, PropertyAttribute::Accessor | PropertyAttribute::DontEnum, getterSetter);
return true;
}
if (handleCommonCrossOriginProperties(&thisObject, vm, propertyName, slot))
return true;
throwSecurityError(lexicalGlobalObject, scope, message);
slot.setUndefined();
return false;
}
bool JSLocation::getOwnPropertySlot(JSObject* object, JSGlobalObject* lexicalGlobalObject, PropertyName propertyName, PropertySlot& slot)
{
VM& vm = lexicalGlobalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto* thisObject = jsCast<JSLocation*>(object);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
bool result = getOwnPropertySlotCommon(*thisObject, *lexicalGlobalObject, propertyName, slot);
EXCEPTION_ASSERT(!scope.exception() || !result);
RETURN_IF_EXCEPTION(scope, false);
if (result)
return true;
RELEASE_AND_RETURN(scope, JSObject::getOwnPropertySlot(object, lexicalGlobalObject, propertyName, slot));
}
bool JSLocation::getOwnPropertySlotByIndex(JSObject* object, JSGlobalObject* lexicalGlobalObject, unsigned index, PropertySlot& slot)
{
VM& vm = lexicalGlobalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto* thisObject = jsCast<JSLocation*>(object);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
bool result = getOwnPropertySlotCommon(*thisObject, *lexicalGlobalObject, Identifier::from(vm, index), slot);
EXCEPTION_ASSERT(!scope.exception() || !result);
RETURN_IF_EXCEPTION(scope, false);
if (result)
return true;
RELEASE_AND_RETURN(scope, JSObject::getOwnPropertySlotByIndex(object, lexicalGlobalObject, index, slot));
}
bool JSLocation::put(JSCell* cell, JSGlobalObject* lexicalGlobalObject, PropertyName propertyName, JSValue value, PutPropertySlot& putPropertySlot)
{
VM& vm = lexicalGlobalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto* thisObject = jsCast<JSLocation*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
// Always allow assigning to the whole location.
// However, allowing assigning of pieces might inadvertently disclose parts of the original location.
// So fall through to the access check for those.
String errorMessage;
if (!BindingSecurity::shouldAllowAccessToDOMWindow(*lexicalGlobalObject, thisObject->wrapped().window(), errorMessage)) {
if (propertyName == builtinNames(vm).hrefPublicName()) {
auto setter = s_info.staticPropHashTable->entry(propertyName)->propertyPutter();
scope.release();
setter(lexicalGlobalObject, JSValue::encode(putPropertySlot.thisValue()), JSValue::encode(value), propertyName);
return true;
}
throwSecurityError(*lexicalGlobalObject, scope, errorMessage);
return false;
}
scope.release();
return JSObject::put(thisObject, lexicalGlobalObject, propertyName, value, putPropertySlot);
}
bool JSLocation::putByIndex(JSCell* cell, JSGlobalObject* lexicalGlobalObject, unsigned index, JSValue value, bool shouldThrow)
{
auto* thisObject = jsCast<JSLocation*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
if (!BindingSecurity::shouldAllowAccessToDOMWindow(lexicalGlobalObject, thisObject->wrapped().window(), ThrowSecurityError))
return false;
return JSObject::putByIndex(cell, lexicalGlobalObject, index, value, shouldThrow);
}
bool JSLocation::deleteProperty(JSCell* cell, JSGlobalObject* lexicalGlobalObject, PropertyName propertyName, DeletePropertySlot& slot)
{
JSLocation* thisObject = jsCast<JSLocation*>(cell);
// Only allow deleting by frames in the same origin.
if (!BindingSecurity::shouldAllowAccessToDOMWindow(lexicalGlobalObject, thisObject->wrapped().window(), ThrowSecurityError))
return false;
return Base::deleteProperty(thisObject, lexicalGlobalObject, propertyName, slot);
}
bool JSLocation::deletePropertyByIndex(JSCell* cell, JSGlobalObject* lexicalGlobalObject, unsigned propertyName)
{
JSLocation* thisObject = jsCast<JSLocation*>(cell);
// Only allow deleting by frames in the same origin.
if (!BindingSecurity::shouldAllowAccessToDOMWindow(lexicalGlobalObject, thisObject->wrapped().window(), ThrowSecurityError))
return false;
return Base::deletePropertyByIndex(thisObject, lexicalGlobalObject, propertyName);
}
void JSLocation::getOwnPropertyNames(JSObject* object, JSGlobalObject* lexicalGlobalObject, PropertyNameArray& propertyNames, DontEnumPropertiesMode mode)
{
JSLocation* thisObject = jsCast<JSLocation*>(object);
if (!BindingSecurity::shouldAllowAccessToDOMWindow(lexicalGlobalObject, thisObject->wrapped().window(), DoNotReportSecurityError)) {
if (mode == DontEnumPropertiesMode::Include)
addCrossOriginOwnPropertyNames<CrossOriginObject::Location>(*lexicalGlobalObject, propertyNames);
return;
}
Base::getOwnPropertyNames(thisObject, lexicalGlobalObject, propertyNames, mode);
}
bool JSLocation::defineOwnProperty(JSObject* object, JSGlobalObject* lexicalGlobalObject, PropertyName propertyName, const PropertyDescriptor& descriptor, bool throwException)
{
JSLocation* thisObject = jsCast<JSLocation*>(object);
if (!BindingSecurity::shouldAllowAccessToDOMWindow(lexicalGlobalObject, thisObject->wrapped().window(), ThrowSecurityError))
return false;
return Base::defineOwnProperty(object, lexicalGlobalObject, propertyName, descriptor, throwException);
}
JSValue JSLocation::getPrototype(JSObject* object, JSGlobalObject* lexicalGlobalObject)
{
JSLocation* thisObject = jsCast<JSLocation*>(object);
if (!BindingSecurity::shouldAllowAccessToDOMWindow(lexicalGlobalObject, thisObject->wrapped().window(), DoNotReportSecurityError))
return jsNull();
return Base::getPrototype(object, lexicalGlobalObject);
}
bool JSLocation::preventExtensions(JSObject*, JSGlobalObject*)
{
return false;
}
} // namespace WebCore
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