http://www.rfc-editor.org/rfc/rfc2612.txt
RFC 2612: The CAST-256 Encryption Algorithm, C. Adams, J. Gilchrist1999-06-01T23:00:00-00:00This document describes an existing algorithm that can be used to satisfy this requirement. Included are a description of the cipher and the key scheduling algorithm, the s-boxes, and a set of test vectors (Appendix A). This memo provides information for the Internet community.