// GoGOST -- Pure Go GOST cryptographic functions library
-// Copyright (C) 2015-2020 Sergey Matveev <stargrave@stargrave.org>
+// Copyright (C) 2015-2023 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
package gost3410
import (
+ "fmt"
"math/big"
- "go.cypherpunks.ru/gogost/v4/gost34112012256"
- "go.cypherpunks.ru/gogost/v4/gost34112012512"
+ "go.cypherpunks.ru/gogost/v5/gost34112012256"
+ "go.cypherpunks.ru/gogost/v5/gost34112012512"
)
// RFC 7836 VKO GOST R 34.10-2012 256-bit key agreement function.
func (prv *PrivateKey) KEK2012256(pub *PublicKey, ukm *big.Int) ([]byte, error) {
key, err := prv.KEK(pub, ukm)
if err != nil {
- return nil, err
+ return nil, fmt.Errorf("gogost/gost3410.PrivateKey.KEK2012256: %w", err)
}
h := gost34112012256.New()
if _, err = h.Write(key); err != nil {
- return nil, err
+ return nil, fmt.Errorf("gogost/gost3410.PrivateKey.KEK2012256: %w", err)
}
return h.Sum(key[:0]), nil
}
func (prv *PrivateKey) KEK2012512(pub *PublicKey, ukm *big.Int) ([]byte, error) {
key, err := prv.KEK(pub, ukm)
if err != nil {
- return nil, err
+ return nil, fmt.Errorf("gogost/gost3410.PrivateKey.KEK2012256: %w", err)
}
h := gost34112012512.New()
if _, err = h.Write(key); err != nil {
- return nil, err
+ return nil, fmt.Errorf("gogost/gost3410.PrivateKey.KEK2012256: %w", err)
}
return h.Sum(key[:0]), nil
}