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// Copyright 2009 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.
// OFB AES test vectors.
// See U.S. National Institute of Standards and Technology (NIST)
// Special Publication 800-38A, ``Recommendation for Block Cipher
// Modes of Operation,'' 2001 Edition, pp. 52-55.
package block
// gotest: $GC ecb_aes_test.go
import (
type ofbTest struct {
name string;
key []byte;
iv []byte;
in []byte;
out []byte;
var ofbAESTests = []ofbTest {
// NIST SP 800-38A pp 52-55
ofbTest {
[]byte {
0x3b, 0x3f, 0xd9, 0x2e, 0xb7, 0x2d, 0xad, 0x20, 0x33, 0x34, 0x49, 0xf8, 0xe8, 0x3c, 0xfb, 0x4a,
0x77, 0x89, 0x50, 0x8d, 0x16, 0x91, 0x8f, 0x03, 0xf5, 0x3c, 0x52, 0xda, 0xc5, 0x4e, 0xd8, 0x25,
0x97, 0x40, 0x05, 0x1e, 0x9c, 0x5f, 0xec, 0xf6, 0x43, 0x44, 0xf7, 0xa8, 0x22, 0x60, 0xed, 0xcc,
0x30, 0x4c, 0x65, 0x28, 0xf6, 0x59, 0xc7, 0x78, 0x66, 0xa5, 0x10, 0xd9, 0xc1, 0xd6, 0xae, 0x5e,
ofbTest {
[]byte {
0xcd, 0xc8, 0x0d, 0x6f, 0xdd, 0xf1, 0x8c, 0xab, 0x34, 0xc2, 0x59, 0x09, 0xc9, 0x9a, 0x41, 0x74,
0xfc, 0xc2, 0x8b, 0x8d, 0x4c, 0x63, 0x83, 0x7c, 0x09, 0xe8, 0x17, 0x00, 0xc1, 0x10, 0x04, 0x01,
0x8d, 0x9a, 0x9a, 0xea, 0xc0, 0xf6, 0x59, 0x6f, 0x55, 0x9c, 0x6d, 0x4d, 0xaf, 0x59, 0xa5, 0xf2,
0x6d, 0x9f, 0x20, 0x08, 0x57, 0xca, 0x6c, 0x3e, 0x9c, 0xac, 0x52, 0x4b, 0xd9, 0xac, 0xc9, 0x2a,
ofbTest {
[]byte {
0xdc, 0x7e, 0x84, 0xbf, 0xda, 0x79, 0x16, 0x4b, 0x7e, 0xcd, 0x84, 0x86, 0x98, 0x5d, 0x38, 0x60,
0x4f, 0xeb, 0xdc, 0x67, 0x40, 0xd2, 0x0b, 0x3a, 0xc8, 0x8f, 0x6a, 0xd8, 0x2a, 0x4f, 0xb0, 0x8d,
0x71, 0xab, 0x47, 0xa0, 0x86, 0xe8, 0x6e, 0xed, 0xf3, 0x9d, 0x1c, 0x5b, 0xba, 0x97, 0xc4, 0x08,
0x01, 0x26, 0x14, 0x1d, 0x67, 0xf3, 0x7b, 0xe8, 0x53, 0x8f, 0x5a, 0x8b, 0xe7, 0x40, 0xe4, 0x84,
func TestOFB_AES(t *testing.T) {
for i, tt := range ofbAESTests {
test :=;
c, err := aes.NewCipher(tt.key);
if err != nil {
t.Errorf("%s: NewCipher(%d bytes) = %s", test, len(tt.key), err);
for j := 0; j <= 5; j += 5 {
var crypt bytes.Buffer;
in :=[0:len( - j];
w := NewOFBWriter(c, tt.iv, &crypt);
var r io.Reader = io.NewByteReader(in);
n, err := io.Copy(r, w);
if n != int64(len(in)) || err != nil {
t.Errorf("%s/%d: OFBWriter io.Copy = %d, %v want %d, nil", test, len(in), n, err, len(in));
} else if d, out := crypt.Data(), tt.out[0:len(in)]; !same(out, d) {
t.Errorf("%s/%d: OFBWriter\ninpt %x\nhave %x\nwant %x", test, len(in), in, d, out);
for j := 0; j <= 7; j += 7 {
var plain bytes.Buffer;
out := tt.out[0:len(tt.out) - j];
r := NewOFBReader(c, tt.iv, io.NewByteReader(out));
w := &plain;
n, err := io.Copy(r, w);
if n != int64(len(out)) || err != nil {
t.Errorf("%s/%d: OFBReader io.Copy = %d, %v want %d, nil", test, len(out), n, err, len(out));
} else if d, in := plain.Data(),[0:len(out)]; !same(in, d) {
t.Errorf("%s/%d: OFBReader\nhave %x\nwant %x", test, len(out), d, in);
if t.Failed() {