# coding: utf-8
# PyGOST -- Pure Python GOST cryptographic functions library
-# Copyright (C) 2015-2019 Sergey Matveev <stargrave@stargrave.org>
+# Copyright (C) 2015-2020 Sergey Matveev <stargrave@stargrave.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# the Free Software Foundation, version 3 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
def ukm_unmarshal(ukm):
"""Unmarshal UKM value
- :type ukm: bytes
+ :type ukm: little-endian bytes
:rtype: long
"""
return bytes2long(ukm[::-1])
def kek(curve, prv, pub, ukm, mode):
key = curve.exp(prv, pub[0], pub[1])
- key = curve.exp(ukm, key[0], key[1])
+ key = curve.exp(curve.cofactor * ukm, key[0], key[1])
return pub_marshal(key, mode)
"""
return GOST341194(
kek(curve, prv, pub, ukm, mode=2001),
- "GostR3411_94_CryptoProParamSet",
+ sbox="id-GostR3411-94-CryptoProParamSet",
).digest()