X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=gost3410%2Fpublic.go;h=85d3557bfe03c7506e4417ed258c6e62665aa46f;hb=220aa87670f1b7ed258374c7ec84a9d9463c7a94;hp=e2e3814e381e9dd8db2caf0408a67bd79fb65d86;hpb=7ed4c1e0857134c14ef5c03dee48c1cc7a555e98;p=gogost.git

diff --git a/gost3410/public.go b/gost3410/public.go
index e2e3814..85d3557 100644
--- a/gost3410/public.go
+++ b/gost3410/public.go
@@ -1,5 +1,5 @@
 // GoGOST -- Pure Go GOST cryptographic functions library
-// Copyright (C) 2015-2020 Sergey Matveev <stargrave@stargrave.org>
+// Copyright (C) 2015-2021 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
@@ -16,6 +16,7 @@
 package gost3410
 
 import (
+	"crypto"
 	"fmt"
 	"math/big"
 )
@@ -26,8 +27,8 @@ type PublicKey struct {
 	Y *big.Int
 }
 
-func NewPublicKey(curve *Curve, raw []byte) (*PublicKey, error) {
-	pointSize := curve.PointSize()
+func NewPublicKey(c *Curve, raw []byte) (*PublicKey, error) {
+	pointSize := c.PointSize()
 	key := make([]byte, 2*pointSize)
 	if len(raw) != len(key) {
 		return nil, fmt.Errorf("gogost/gost3410: len(key) != %d", len(key))
@@ -36,7 +37,7 @@ func NewPublicKey(curve *Curve, raw []byte) (*PublicKey, error) {
 		key[i] = raw[len(raw)-i-1]
 	}
 	return &PublicKey{
-		curve,
+		c,
 		bytes2big(key[pointSize : 2*pointSize]),
 		bytes2big(key[:pointSize]),
 	}, nil
@@ -107,3 +108,11 @@ func (pub *PublicKey) VerifyDigest(digest, signature []byte) (bool, error) {
 	lm.Mod(lm, pub.C.Q)
 	return lm.Cmp(r) == 0, nil
 }
+
+func (our *PublicKey) Equal(theirKey crypto.PublicKey) bool {
+	their, ok := theirKey.(*PublicKey)
+	if !ok {
+		return false
+	}
+	return our.X.Cmp(their.X) == 0 && our.Y.Cmp(their.Y) == 0 && our.C.Equal(their.C)
+}