CAST5 (CAST-128)

modulename: cast5_generic.ko

configname: CONFIG_CRYPTO_CAST5

Linux Kernel Configuration
└─>Cryptographic API
└─>Block ciphers
└─>CAST5 (CAST-128)
In linux kernel since version 2.6.12  
CAST5 (CAST-128) cipher algorithm (RFC2144, ISO/IEC 18033-3)

source code: