/* return object attributes from the current request */
const struct object_attributes *get_req_object_attributes( const struct security_descriptor **sd,
struct unicode_str *name,
struct object **root )
{
static const struct object_attributes empty_attributes;
const struct object_attributes *attr = get_req_data();
data_size_t size = get_req_data_size();
if (root) *root = NULL;
if (!size)
{
*sd = NULL;
name->len = 0;
return &empty_attributes;
}
if ((size < sizeof(*attr)) || (size - sizeof(*attr) < attr->sd_len) ||
(size - sizeof(*attr) - attr->sd_len < attr->name_len))
{
set_error( STATUS_ACCESS_VIOLATION );
return NULL;
}
if (attr->sd_len && !sd_is_valid( (const struct security_descriptor *)(attr + 1), attr->sd_len ))
{
set_error( STATUS_INVALID_SECURITY_DESCR );
return NULL;
}
if ((attr->name_len & (sizeof(WCHAR) - 1)) || attr->name_len >= 65534)
{
set_error( STATUS_OBJECT_NAME_INVALID );
return NULL;
}
if (root && attr->rootdir && attr->name_len)
{
if (!(*root = get_directory_obj( current->process, attr->rootdir ))) return NULL;
}
*sd = attr->sd_len ? (const struct security_descriptor *)(attr + 1) : NULL;
name->len = attr->name_len;
name->str = (const WCHAR *)(attr + 1) + attr->sd_len / sizeof(WCHAR);
return attr;
}
/* open a new handle to an existing object */
obj_handle_t open_object( struct process *process, obj_handle_t parent, unsigned int access,
const struct object_ops *ops, const struct unicode_str *name,
unsigned int attributes )
{
obj_handle_t handle = 0;
struct directory *root = NULL;
struct object *obj;
if (name->len >= 65534)
{
set_error( STATUS_OBJECT_NAME_INVALID );
return 0;
}
if (parent && !(root = get_directory_obj( process, parent, 0 ))) return 0;
if ((obj = open_object_dir( root, name, attributes, ops )))
{
handle = alloc_handle( process, obj, access, attributes );
release_object( obj );
}
if (root) release_object( root );
return handle;
}
