[Ocf-linux-users] AES hardware accelerator in OpenSSL with OCF

[Palacios, H. <Hec...@di...>]

Greetings,

I have a Netsilicon CPU (NS9215) which contains an AES accelerator which I want to use with OpenSSL. I have a Linux driver for this hardware AES module which uses the kernel 2.6.26 CryptoAPI.
This driver basically registers the cbc(aes) and ecb(aes) ciphers.

/ # cat /proc/crypto 
name         : cbc(aes)
driver       : ns921x-aes
module       : kernel
priority     : 0
refcnt       : 1
type         : ablkcipher
async        : yes
blocksize    : 16
min keysize  : 16
max keysize  : 32
ivsize       : 0
geniv        : <default>

name         : ecb(aes)
driver       : ns921x-aes
module       : kernel
priority     : 400
refcnt       : 1
type         : ablkcipher
async        : yes
blocksize    : 16
min keysize  : 16
max keysize  : 32
ivsize       : 0
geniv        : <default>


I would like to have OpenSSL use this driver to accelerate encryption when using these ciphers. I'm using openssl-0.9.8g and have integrated the OCF patches for the 2.6.26 version and for OpenSSL 0.9.8g (similarly as done in http://www.docunext.com/wiki/My_Notes_on_Patching_2.6.22_with_OCF). It builds ok and I obtain several modules: ocf.ko, cryptodev.ko cryptosoft.ko.
I load these three modules. The cryptosoft.ko loads my hardware AES driver.

By executing the OpenSSL commands with option '-engine cryptodev', OpenSSL seems to be using this engine. However, just with that my specific driver functions are not being called. For example I have tried with:
# openssl speed -engine cryptodev -evp aes128
and with 
# time openssl enc aes128 -engine cryptodev -in testfile -out /dev/null -k test

I would appreciate any hint of how to tell OCF to call my driver functions.
Many thanks
--
Héctor Palacios