X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=gost3410%2Fvko.go;h=e373e4a6c2a63ef290fd77ec0652f436d1a68f28;hb=589425e6516d75e5c233d72369e39a6a293740b2;hp=bb10f9430b98bbf818c24e2bbb912bafb8fffa6e;hpb=c07494bbd559b9d00f391e28cfd070e18afe9900;p=gogost.git

diff --git a/gost3410/vko.go b/gost3410/vko.go
index bb10f94..e373e4a 100644
--- a/gost3410/vko.go
+++ b/gost3410/vko.go
@@ -1,5 +1,5 @@
 // GoGOST -- Pure Go 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
@@ -24,6 +24,7 @@ func (prv *PrivateKey) KEK(pub *PublicKey, ukm *big.Int) ([]byte, error) {
 	if err != nil {
 		return nil, err
 	}
+	ukm = ukm.Mul(ukm, prv.C.Co)
 	if ukm.Cmp(bigInt1) != 0 {
 		keyX, keyY, err = prv.C.Exp(ukm, keyX, keyY)
 		if err != nil {