Symmetric key cipher algorithms

modulename: algif_skcipher.ko

configname: CONFIG_CRYPTO_USER_API_SKCIPHER

Linux Kernel Configuration
└─>Cryptographic API
└─>Userspace interface
└─>Symmetric key cipher algorithms
In linux kernel since version 2.6.38 (release Date: 2011-03-14)  
Enable the userspace interface for symmetric key cipher algorithms.

See Documentation/crypto/userspace-if.rst and
https://www.chronox.de/libkcapi/html/index.html

source code:
crypto/algif_skcipher.c