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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package cipher_test
import (
"bytes"
"crypto/aes"
"crypto/cipher"
"crypto/rand"
"testing"
)
func TestCFB(t *testing.T) {
block, err := aes.NewCipher(commonKey128)
if err != nil {
t.Error(err)
return
}
plaintext := []byte("this is the plaintext. this is the plaintext.")
iv := make([]byte, block.BlockSize())
rand.Reader.Read(iv)
cfb := cipher.NewCFBEncrypter(block, iv)
ciphertext := make([]byte, len(plaintext))
copy(ciphertext, plaintext)
cfb.XORKeyStream(ciphertext, ciphertext)
cfbdec := cipher.NewCFBDecrypter(block, iv)
plaintextCopy := make([]byte, len(plaintext))
copy(plaintextCopy, ciphertext)
cfbdec.XORKeyStream(plaintextCopy, plaintextCopy)
if !bytes.Equal(plaintextCopy, plaintext) {
t.Errorf("got: %x, want: %x", plaintextCopy, plaintext)
}
}
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