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 // OFB 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. 52-55. 10 11 package cipher_test 12 13 import ( 14 "bytes" 15 "crypto/aes" 16 "crypto/cipher" 17 "testing" 18 ) 19 20 type ofbTest struct { 21 name string 22 key []byte 23 iv []byte 24 in []byte 25 out []byte 26 } 27 28 var ofbTests = []ofbTest{ 29 // NIST SP 800-38A pp 52-55 30 { 31 "OFB-AES128", 32 commonKey128, 33 commonIV, 34 commonInput, 35 []byte{ 36 0x3b, 0x3f, 0xd9, 0x2e, 0xb7, 0x2d, 0xad, 0x20, 0x33, 0x34, 0x49, 0xf8, 0xe8, 0x3c, 0xfb, 0x4a, 37 0x77, 0x89, 0x50, 0x8d, 0x16, 0x91, 0x8f, 0x03, 0xf5, 0x3c, 0x52, 0xda, 0xc5, 0x4e, 0xd8, 0x25, 38 0x97, 0x40, 0x05, 0x1e, 0x9c, 0x5f, 0xec, 0xf6, 0x43, 0x44, 0xf7, 0xa8, 0x22, 0x60, 0xed, 0xcc, 39 0x30, 0x4c, 0x65, 0x28, 0xf6, 0x59, 0xc7, 0x78, 0x66, 0xa5, 0x10, 0xd9, 0xc1, 0xd6, 0xae, 0x5e, 40 }, 41 }, 42 { 43 "OFB-AES192", 44 commonKey192, 45 commonIV, 46 commonInput, 47 []byte{ 48 0xcd, 0xc8, 0x0d, 0x6f, 0xdd, 0xf1, 0x8c, 0xab, 0x34, 0xc2, 0x59, 0x09, 0xc9, 0x9a, 0x41, 0x74, 49 0xfc, 0xc2, 0x8b, 0x8d, 0x4c, 0x63, 0x83, 0x7c, 0x09, 0xe8, 0x17, 0x00, 0xc1, 0x10, 0x04, 0x01, 50 0x8d, 0x9a, 0x9a, 0xea, 0xc0, 0xf6, 0x59, 0x6f, 0x55, 0x9c, 0x6d, 0x4d, 0xaf, 0x59, 0xa5, 0xf2, 51 0x6d, 0x9f, 0x20, 0x08, 0x57, 0xca, 0x6c, 0x3e, 0x9c, 0xac, 0x52, 0x4b, 0xd9, 0xac, 0xc9, 0x2a, 52 }, 53 }, 54 { 55 "OFB-AES256", 56 commonKey256, 57 commonIV, 58 commonInput, 59 []byte{ 60 0xdc, 0x7e, 0x84, 0xbf, 0xda, 0x79, 0x16, 0x4b, 0x7e, 0xcd, 0x84, 0x86, 0x98, 0x5d, 0x38, 0x60, 61 0x4f, 0xeb, 0xdc, 0x67, 0x40, 0xd2, 0x0b, 0x3a, 0xc8, 0x8f, 0x6a, 0xd8, 0x2a, 0x4f, 0xb0, 0x8d, 62 0x71, 0xab, 0x47, 0xa0, 0x86, 0xe8, 0x6e, 0xed, 0xf3, 0x9d, 0x1c, 0x5b, 0xba, 0x97, 0xc4, 0x08, 63 0x01, 0x26, 0x14, 0x1d, 0x67, 0xf3, 0x7b, 0xe8, 0x53, 0x8f, 0x5a, 0x8b, 0xe7, 0x40, 0xe4, 0x84, 64 }, 65 }, 66 } 67 68 func TestOFB(t *testing.T) { 69 for _, tt := range ofbTests { 70 test := tt.name 71 72 c, err := aes.NewCipher(tt.key) 73 if err != nil { 74 t.Errorf("%s: NewCipher(%d bytes) = %s", test, len(tt.key), err) 75 continue 76 } 77 78 for j := 0; j <= 5; j += 5 { 79 plaintext := tt.in[0 : len(tt.in)-j] 80 ofb := cipher.NewOFB(c, tt.iv) 81 ciphertext := make([]byte, len(plaintext)) 82 ofb.XORKeyStream(ciphertext, plaintext) 83 if !bytes.Equal(ciphertext, tt.out[:len(plaintext)]) { 84 t.Errorf("%s/%d: encrypting\ninput % x\nhave % x\nwant % x", test, len(plaintext), plaintext, ciphertext, tt.out) 85 } 86 } 87 88 for j := 0; j <= 5; j += 5 { 89 ciphertext := tt.out[0 : len(tt.in)-j] 90 ofb := cipher.NewOFB(c, tt.iv) 91 plaintext := make([]byte, len(ciphertext)) 92 ofb.XORKeyStream(plaintext, ciphertext) 93 if !bytes.Equal(plaintext, tt.in[:len(ciphertext)]) { 94 t.Errorf("%s/%d: decrypting\nhave % x\nwant % x", test, len(ciphertext), plaintext, tt.in) 95 } 96 } 97 98 if t.Failed() { 99 break 100 } 101 } 102 } 103
