This document specifies how to incorporate CAST-128 (RFC2144) into the S/MIME Cryptographic Message Syntax (CMS) as an additional algorithm for symmetric encryption. The relevant OIDs and processing steps are provided so that CAST-128 may be included in the CMS specification (RFC2630) for symmetric content and key encryption.
RFC 2984-2000 history
2000RFC 2984-2000 Use of the CAST-128 Encryption Algorithm in CMS