X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=pygost%2Fgost3410.py;h=8103af0641ae929b30bce50beeb9355256f45dd9;hb=21a30721c31912c296e1faced73e2fd0db191be9;hp=77637c31b534e28c30bd972755a89b5a45567f02;hpb=4b7fd2c1923d5803afe1b078727ee68624430af9;p=pygost.git

diff --git a/pygost/gost3410.py b/pygost/gost3410.py
index 77637c3..8103af0 100644
--- a/pygost/gost3410.py
+++ b/pygost/gost3410.py
@@ -1,6 +1,6 @@
 # coding: utf-8
 # PyGOST -- Pure Python GOST cryptographic functions library
-# Copyright (C) 2015-2016 Sergey Matveev <stargrave@stargrave.org>
+# Copyright (C) 2015-2019 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
@@ -162,9 +162,9 @@ class GOST3410Curve(object):
         y = y or self.y
         tx = x
         ty = y
-        degree -= 1
         if degree == 0:
             raise ValueError("Bad degree value")
+        degree -= 1
         while degree != 0:
             if degree & 1 == 1:
                 tx, ty = self._add(tx, ty, x, y)
@@ -178,7 +178,7 @@ def public_key(curve, prv):
 
     :param GOST3410Curve curve: curve to use
     :param long prv: private key
-    :return: public key's parts, X and Y
+    :returns: public key's parts, X and Y
     :rtype: (long, long)
     """
     return curve.exp(prv)
@@ -191,7 +191,7 @@ def sign(curve, prv, digest, mode=2001):
     :param long prv: private key
     :param digest: digest for signing
     :type digest: bytes, 32 or 64 bytes
-    :return: signature
+    :returns: signature
     :rtype: bytes, 64 or 128 bytes
     """
     size = MODE2SIZE[mode]