>>> data_for_signing = b"some data"
>>> dgst = gost34112012256.new(data_for_signing).digest()[::-1]
>>> from pygost.gost3410 import sign
>>> data_for_signing = b"some data"
>>> dgst = gost34112012256.new(data_for_signing).digest()[::-1]
>>> from pygost.gost3410 import sign