MD5 digest algorithm

modulename: md5.ko

configname: CONFIG_CRYPTO_MD5

Linux Kernel Configuration
└─>Cryptographic options
└─>MD5 digest algorithm
In linux kernel since version 2.6.12  
MD5 message digest algorithm (RFC1321).

source code:
crypto/md5.c

depends
CONFIG_CRYPTO

is selected by
CONFIG_RPCSEC_GSS_KRB5