GCM/GMAC support

modulename: gcm.ko

configname: CONFIG_CRYPTO_GCM

Linux Kernel Configuration
└─>Cryptographic API
└─>GCM/GMAC support
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
Support for Galois/Counter Mode (GCM) and Galois Message
Authentication Code (GMAC). Required for IPSec.

source code:
crypto/gcm.c

depends
CONFIG_CRYPTO