>>> from os import urandom
>>> prv_raw = urandom(64)
>>> from pygost.gost3410 import prv_unmarshal
+ >>> from pygost.gost3410 import prv_marshal
>>> prv = prv_unmarshal(prv_raw)
+ >>> prv_raw = prv_marshal(curve, prv)
>>> from pygost.gost3410 import public_key
>>> pub = public_key(curve, prv)
>>> from pygost.gost3410 import pub_marshal