I've just had mail from Carlisle Adams in response to my question about the status of CAST-128:
CAST-128 is available free for commercial and non-commercial use. This has been stated publicly in a press release from Entrust Technologies (see http://www.entrust.com/press.htm for details). The cipher itself is described in complete detail, along with test vectors, etc., at the same web site (see the "Technical Papers" section of http://www.entrust.com/library.htm).
Feel free to post this response wherever you think it appropriate.
-------------------------------------- Carlisle Adams Entrust Technologies cadams@entrust.com ---------------------------------------
The algorithm is well worth looking at (see the URL above) - it's a nice royalty-free drop-in replacement for IDEA for example. I've had a version half-finished for inclusion in cryptlib for a few months now, but something else always seems to crop up... Peter.