CAST5 (CAST-128) cipher algorithm

modulename: cast5.ko

and/or

cast5_generic.ko

configname: CONFIG_CRYPTO_CAST5

Linux Kernel Configuration
└─>Cryptographic API
└─>CAST5 (CAST-128) cipher algorithm
In linux kernel since version 2.6.12  
The CAST5 encryption algorithm (synonymous with CAST-128) is
described in RFC2144.

source code: