// GoGOST -- Pure Go GOST cryptographic functions library
-// Copyright (C) 2015-2017 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
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
+// the Free Software Foundation, version 3 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
)
type Cipher struct {
- key *[KeySize]byte
+ key [KeySize]byte
sbox *Sbox
x [8]nv
}
-func NewCipher(key [KeySize]byte, sbox *Sbox) *Cipher {
- c := Cipher{}
- c.key = &key
- c.sbox = sbox
+func NewCipher(key []byte, sbox *Sbox) *Cipher {
+ if len(key) != KeySize {
+ panic("invalid key size")
+ }
+ c := Cipher{sbox: sbox}
+ copy(c.key[:], key)
c.x = [8]nv{
nv(key[0]) | nv(key[1])<<8 | nv(key[2])<<16 | nv(key[3])<<24,
nv(key[4]) | nv(key[5])<<8 | nv(key[6])<<16 | nv(key[7])<<24,