Userspace cryptographic algorithm configuration

modulename: crypto_user.ko

configname: CONFIG_CRYPTO_USER

Linux Kernel Configuration
└─>Cryptographic API
└─>Crypto core or helper
└─>Userspace cryptographic algorithm configuration
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Userspace configuration for cryptographic instantiations such as
cbc(aes).

source code:
crypto/