CONFIG_CRYPTO_LIB_MD5 (not configurable)

modulename: libmd5.ko

configname: CONFIG_CRYPTO_LIB_MD5

Linux Kernel Configuration
└─>Library routines
└─>Crypto library routines
└─>CRYPTO_LIB_MD5
The MD5 and HMAC-MD5 library functions. Select this if your module
uses any of the functions from <crypto/md5.h>.

source code: