From 0f9eff2c693f021fd502d5a4f2b98ccc0d3e13c5 Mon Sep 17 00:00:00 2001
From: Sergey Matveev <stargrave@stargrave.org>
Date: Wed, 10 Jul 2019 15:55:28 +0300
Subject: [PATCH] Reuse _pos method

---
 pygost/gost3410.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/pygost/gost3410.py b/pygost/gost3410.py
index 1167676..f1baa58 100644
--- a/pygost/gost3410.py
+++ b/pygost/gost3410.py
@@ -54,9 +54,7 @@ class GOST3410Curve(object):
         self.y = y
         r1 = self.y * self.y % self.p
         r2 = ((self.x * self.x + self.a) * self.x + self.b) % self.p
-        if r2 < 0:
-            r2 += self.p
-        if r1 != r2:
+        if r1 != self._pos(r2):
             raise ValueError("Invalid parameters")
 
     def _pos(self, v):
-- 
2.44.0