1// Copyright 2009 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5// CBC AES test vectors.
6
7// See U.S. National Institute of Standards and Technology (NIST)
8// Special Publication 800-38A, ``Recommendation for Block Cipher
9// Modes of Operation,'' 2001 Edition, pp. 24-29.
10
11package cipher_test
12
13import (
14	"bytes"
15	"crypto/aes"
16	"crypto/cipher"
17	"testing"
18)
19
20var cbcAESTests = []struct {
21	name string
22	key  []byte
23	iv   []byte
24	in   []byte
25	out  []byte
26}{
27	// NIST SP 800-38A pp 27-29
28	{
29		"CBC-AES128",
30		commonKey128,
31		commonIV,
32		commonInput,
33		[]byte{
34			0x76, 0x49, 0xab, 0xac, 0x81, 0x19, 0xb2, 0x46, 0xce, 0xe9, 0x8e, 0x9b, 0x12, 0xe9, 0x19, 0x7d,
35			0x50, 0x86, 0xcb, 0x9b, 0x50, 0x72, 0x19, 0xee, 0x95, 0xdb, 0x11, 0x3a, 0x91, 0x76, 0x78, 0xb2,
36			0x73, 0xbe, 0xd6, 0xb8, 0xe3, 0xc1, 0x74, 0x3b, 0x71, 0x16, 0xe6, 0x9e, 0x22, 0x22, 0x95, 0x16,
37			0x3f, 0xf1, 0xca, 0xa1, 0x68, 0x1f, 0xac, 0x09, 0x12, 0x0e, 0xca, 0x30, 0x75, 0x86, 0xe1, 0xa7,
38		},
39	},
40	{
41		"CBC-AES192",
42		commonKey192,
43		commonIV,
44		commonInput,
45		[]byte{
46			0x4f, 0x02, 0x1d, 0xb2, 0x43, 0xbc, 0x63, 0x3d, 0x71, 0x78, 0x18, 0x3a, 0x9f, 0xa0, 0x71, 0xe8,
47			0xb4, 0xd9, 0xad, 0xa9, 0xad, 0x7d, 0xed, 0xf4, 0xe5, 0xe7, 0x38, 0x76, 0x3f, 0x69, 0x14, 0x5a,
48			0x57, 0x1b, 0x24, 0x20, 0x12, 0xfb, 0x7a, 0xe0, 0x7f, 0xa9, 0xba, 0xac, 0x3d, 0xf1, 0x02, 0xe0,
49			0x08, 0xb0, 0xe2, 0x79, 0x88, 0x59, 0x88, 0x81, 0xd9, 0x20, 0xa9, 0xe6, 0x4f, 0x56, 0x15, 0xcd,
50		},
51	},
52	{
53		"CBC-AES256",
54		commonKey256,
55		commonIV,
56		commonInput,
57		[]byte{
58			0xf5, 0x8c, 0x4c, 0x04, 0xd6, 0xe5, 0xf1, 0xba, 0x77, 0x9e, 0xab, 0xfb, 0x5f, 0x7b, 0xfb, 0xd6,
59			0x9c, 0xfc, 0x4e, 0x96, 0x7e, 0xdb, 0x80, 0x8d, 0x67, 0x9f, 0x77, 0x7b, 0xc6, 0x70, 0x2c, 0x7d,
60			0x39, 0xf2, 0x33, 0x69, 0xa9, 0xd9, 0xba, 0xcf, 0xa5, 0x30, 0xe2, 0x63, 0x04, 0x23, 0x14, 0x61,
61			0xb2, 0xeb, 0x05, 0xe2, 0xc3, 0x9b, 0xe9, 0xfc, 0xda, 0x6c, 0x19, 0x07, 0x8c, 0x6a, 0x9d, 0x1b,
62		},
63	},
64}
65
66func TestCBCEncrypterAES(t *testing.T) {
67	for _, test := range cbcAESTests {
68		c, err := aes.NewCipher(test.key)
69		if err != nil {
70			t.Errorf("%s: NewCipher(%d bytes) = %s", test.name, len(test.key), err)
71			continue
72		}
73
74		encrypter := cipher.NewCBCEncrypter(c, test.iv)
75
76		data := make([]byte, len(test.in))
77		copy(data, test.in)
78
79		encrypter.CryptBlocks(data, data)
80		if !bytes.Equal(test.out, data) {
81			t.Errorf("%s: CBCEncrypter\nhave %x\nwant %x", test.name, data, test.out)
82		}
83	}
84}
85
86func TestCBCDecrypterAES(t *testing.T) {
87	for _, test := range cbcAESTests {
88		c, err := aes.NewCipher(test.key)
89		if err != nil {
90			t.Errorf("%s: NewCipher(%d bytes) = %s", test.name, len(test.key), err)
91			continue
92		}
93
94		decrypter := cipher.NewCBCDecrypter(c, test.iv)
95
96		data := make([]byte, len(test.out))
97		copy(data, test.out)
98
99		decrypter.CryptBlocks(data, data)
100		if !bytes.Equal(test.in, data) {
101			t.Errorf("%s: CBCDecrypter\nhave %x\nwant %x", test.name, data, test.in)
102		}
103	}
104}
105