CONFIG_CRYPTO_USER_API (not configurable)

modulename: af_alg.ko

configname: CONFIG_CRYPTO_USER_API

Linux Kernel Configuration
└─>Cryptographic API
└─>Userspace interface
└─>CRYPTO_USER_API
In linux kernel since version 2.6.38 (release Date: 2011-03-14)  
source code:
crypto/af_alg.c
depends
CONFIG_CRYPTO