Patch for Enhancing crypto abstract API

[Jouni Malinen]

On Mon, Oct 16, 2017 at 03:45:09PM +1000, Sean Parkinson wrote:
> Please see below for my proposed patch.
> 
> The patch offers alternate implementations of some functions using the abstract cryptographic API.
> 
> This work was done in preparation for the changes to allow hostap to be compiled with the wolfSSL cryptography and TLS library.

Thanks, I applied this with some cleanup and fixes. As a larger change,
I removed the duplicated implementation and the CRYPTO_ABSTRACT_API
define so that there is only one implementation to maintain (the one
using CRYPTO_ABSTRACT_API).

-- 
Jouni Malinen                                            PGP id EFC895FA