X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=src%2Fcypherpunks.ru%2Fgogost%2Fgost28147%2Fcfb.go;h=dfcd8f7b7f9812ea3f23c52a34580cf3f6a8d8f8;hb=91562b3cf4aad503c493aa7b69abfbb07b46e63a;hp=5c39ffa8b76195c3e94f4ad7fa7757a5fc9afc41;hpb=014be6ab0719643d1e2996a360ab0619124b7e0e;p=gogost.git

diff --git a/src/cypherpunks.ru/gogost/gost28147/cfb.go b/src/cypherpunks.ru/gogost/gost28147/cfb.go
index 5c39ffa..dfcd8f7 100644
--- a/src/cypherpunks.ru/gogost/gost28147/cfb.go
+++ b/src/cypherpunks.ru/gogost/gost28147/cfb.go
@@ -1,10 +1,9 @@
 // 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
@@ -21,8 +20,13 @@ type CFBEncrypter struct {
 	iv []byte
 }
 
-func (c *Cipher) NewCFBEncrypter(iv [BlockSize]byte) *CFBEncrypter {
-	return &CFBEncrypter{c, iv[:]}
+func (c *Cipher) NewCFBEncrypter(iv []byte) *CFBEncrypter {
+	if len(iv) != BlockSize {
+		panic("iv length is not equal to blocksize")
+	}
+	encrypter := CFBEncrypter{c: c, iv: make([]byte, BlockSize)}
+	copy(encrypter.iv, iv)
+	return &encrypter
 }
 
 func (c *CFBEncrypter) XORKeyStream(dst, src []byte) {
@@ -48,8 +52,13 @@ type CFBDecrypter struct {
 	iv []byte
 }
 
-func (c *Cipher) NewCFBDecrypter(iv [BlockSize]byte) *CFBDecrypter {
-	return &CFBDecrypter{c, iv[:]}
+func (c *Cipher) NewCFBDecrypter(iv []byte) *CFBDecrypter {
+	if len(iv) != BlockSize {
+		panic("iv length is not equal to blocksize")
+	}
+	decrypter := CFBDecrypter{c: c, iv: make([]byte, BlockSize)}
+	copy(decrypter.iv, iv)
+	return &decrypter
 }
 
 func (c *CFBDecrypter) XORKeyStream(dst, src []byte) {