BeauSlim

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.