CONFIG_CRYPTO_ENGINE (not configurable)

modulename: crypto_engine.ko

configname: CONFIG_CRYPTO_ENGINE

Linux Kernel Configuration
└─>Cryptographic API
└─>Crypto core or helper
└─>CRYPTO_ENGINE
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
crypto/crypto_engine.c
depends
CONFIG_CRYPTO