Python3 bindings for crystalskyber reference implementation using CFFI

Note this python3 binding was built just for prototyping and playing around with the reference design for fast-paced development before building it properly in C

This uses reference design from kyber and modified slightly to add randombytes to the sharedlibs

Getting kyber shared libraries

Building kyber

cd kyber/ref
make shared

Installing the libs

# In the kyber/ref directory
sudo cp libpqcrystals_* /usr/local/lib

Getting to run the bindings

Installing cffi

pip3 install cffi

Adding local library path to variable for cffi to know where to look

export LD_LIBRARY_PATH=/usr/local/lib

Building python3 bindings

# In the parent directory kyber-pythonlib
make build

Test simple encapsulation and decapsulation test

make run