libgo/go/crypto/cipher/ofb_test.go

   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 }