OpenSSL is user-space, so you need to use AF_ALG (or Cryptodev but that's kind of old-school) to bridge to kernel-space and access the rk_crypto driver. I looked at this (referring to some Marvell pogo-plug era documentation) but never bothered to sort out all the pieces needed.
My application was a VPN, and I went the easy way and used IPSec, which lives in kernel-space. A good kernel module, StrongSwan, and the related NetworkManager plugin and you *should* be good to go. But, like I mentioned in my post above: with no module loaded, traffic flows fine. With the module loaded, I got no traffic and usually had a whole-board lockup.
AFAIK, many of the v8 chips out now support ARM crypto acceleration so there's little point in mucking with something proprietary except out of curiosity.
BeauSlim got a reaction from Rfreire in rockchip hardware crypto on Tinker Board?