sha512 kata c

Note: this is not software for production.

Testing

SHA512/256("")
0x c672b8d1ef56ed28ab87c3622c5114069bdd3ad7b8f9737498d0c01ecef0967a

(from https://en.wikipedia.org/wiki/SHA-2)

in mac,

➜  sha512 git:(master) echo -n "" | shasum -a 512256
c672b8d1ef56ed28ab87c3622c5114069bdd3ad7b8f9737498d0c01ecef0967a  -

Running the tests

cmake . && make all test

Also:

cmake . && make all && ./unit_tests