crypt with loesetup -p with password from file

Hi, I use Suse 9.0 and I want to use the /dev/loop device for crypting with twofish. Im searching for a way to use the loesetup with the password from a file or better a pipe. I know in debian exist a loesetup with a "-p" option. Someone know a link with a rpm-package :-) or sorce? cu Josef