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