twofish_test.go 4.7 KB

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  1. // Copyright 2011 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. package twofish
  5. import (
  6. "bytes"
  7. "testing"
  8. )
  9. var qbox = [2][4][16]byte{
  10. {
  11. {0x8, 0x1, 0x7, 0xD, 0x6, 0xF, 0x3, 0x2, 0x0, 0xB, 0x5, 0x9, 0xE, 0xC, 0xA, 0x4},
  12. {0xE, 0xC, 0xB, 0x8, 0x1, 0x2, 0x3, 0x5, 0xF, 0x4, 0xA, 0x6, 0x7, 0x0, 0x9, 0xD},
  13. {0xB, 0xA, 0x5, 0xE, 0x6, 0xD, 0x9, 0x0, 0xC, 0x8, 0xF, 0x3, 0x2, 0x4, 0x7, 0x1},
  14. {0xD, 0x7, 0xF, 0x4, 0x1, 0x2, 0x6, 0xE, 0x9, 0xB, 0x3, 0x0, 0x8, 0x5, 0xC, 0xA},
  15. },
  16. {
  17. {0x2, 0x8, 0xB, 0xD, 0xF, 0x7, 0x6, 0xE, 0x3, 0x1, 0x9, 0x4, 0x0, 0xA, 0xC, 0x5},
  18. {0x1, 0xE, 0x2, 0xB, 0x4, 0xC, 0x3, 0x7, 0x6, 0xD, 0xA, 0x5, 0xF, 0x9, 0x0, 0x8},
  19. {0x4, 0xC, 0x7, 0x5, 0x1, 0x6, 0x9, 0xA, 0x0, 0xE, 0xD, 0x8, 0x2, 0xB, 0x3, 0xF},
  20. {0xB, 0x9, 0x5, 0x1, 0xC, 0x3, 0xD, 0xE, 0x6, 0x4, 0x7, 0xF, 0x2, 0x0, 0x8, 0xA},
  21. },
  22. }
  23. // genSbox generates the variable sbox
  24. func genSbox(qi int, x byte) byte {
  25. a0, b0 := x/16, x%16
  26. for i := 0; i < 2; i++ {
  27. a1 := a0 ^ b0
  28. b1 := (a0 ^ ((b0 << 3) | (b0 >> 1)) ^ (a0 << 3)) & 15
  29. a0 = qbox[qi][2*i][a1]
  30. b0 = qbox[qi][2*i+1][b1]
  31. }
  32. return (b0 << 4) + a0
  33. }
  34. func TestSbox(t *testing.T) {
  35. for n := range sbox {
  36. for m := range sbox[n] {
  37. if genSbox(n, byte(m)) != sbox[n][m] {
  38. t.Errorf("#%d|%d: sbox value = %d want %d", n, m, sbox[n][m], genSbox(n, byte(m)))
  39. }
  40. }
  41. }
  42. }
  43. var testVectors = []struct {
  44. key []byte
  45. dec []byte
  46. enc []byte
  47. }{
  48. // These tests are extracted from LibTom
  49. {
  50. []byte{0x9F, 0x58, 0x9F, 0x5C, 0xF6, 0x12, 0x2C, 0x32, 0xB6, 0xBF, 0xEC, 0x2F, 0x2A, 0xE8, 0xC3, 0x5A},
  51. []byte{0xD4, 0x91, 0xDB, 0x16, 0xE7, 0xB1, 0xC3, 0x9E, 0x86, 0xCB, 0x08, 0x6B, 0x78, 0x9F, 0x54, 0x19},
  52. []byte{0x01, 0x9F, 0x98, 0x09, 0xDE, 0x17, 0x11, 0x85, 0x8F, 0xAA, 0xC3, 0xA3, 0xBA, 0x20, 0xFB, 0xC3},
  53. },
  54. {
  55. []byte{0x88, 0xB2, 0xB2, 0x70, 0x6B, 0x10, 0x5E, 0x36, 0xB4, 0x46, 0xBB, 0x6D, 0x73, 0x1A, 0x1E, 0x88,
  56. 0xEF, 0xA7, 0x1F, 0x78, 0x89, 0x65, 0xBD, 0x44},
  57. []byte{0x39, 0xDA, 0x69, 0xD6, 0xBA, 0x49, 0x97, 0xD5, 0x85, 0xB6, 0xDC, 0x07, 0x3C, 0xA3, 0x41, 0xB2},
  58. []byte{0x18, 0x2B, 0x02, 0xD8, 0x14, 0x97, 0xEA, 0x45, 0xF9, 0xDA, 0xAC, 0xDC, 0x29, 0x19, 0x3A, 0x65},
  59. },
  60. {
  61. []byte{0xD4, 0x3B, 0xB7, 0x55, 0x6E, 0xA3, 0x2E, 0x46, 0xF2, 0xA2, 0x82, 0xB7, 0xD4, 0x5B, 0x4E, 0x0D,
  62. 0x57, 0xFF, 0x73, 0x9D, 0x4D, 0xC9, 0x2C, 0x1B, 0xD7, 0xFC, 0x01, 0x70, 0x0C, 0xC8, 0x21, 0x6F},
  63. []byte{0x90, 0xAF, 0xE9, 0x1B, 0xB2, 0x88, 0x54, 0x4F, 0x2C, 0x32, 0xDC, 0x23, 0x9B, 0x26, 0x35, 0xE6},
  64. []byte{0x6C, 0xB4, 0x56, 0x1C, 0x40, 0xBF, 0x0A, 0x97, 0x05, 0x93, 0x1C, 0xB6, 0xD4, 0x08, 0xE7, 0xFA},
  65. },
  66. // These test are derived from http://www.schneier.com/code/ecb_ival.txt
  67. {
  68. []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
  69. []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
  70. []byte{0x9F, 0x58, 0x9F, 0x5C, 0xF6, 0x12, 0x2C, 0x32, 0xB6, 0xBF, 0xEC, 0x2F, 0x2A, 0xE8, 0xC3, 0x5A},
  71. },
  72. {
  73. []byte{0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10,
  74. 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
  75. },
  76. []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
  77. []byte{0xCF, 0xD1, 0xD2, 0xE5, 0xA9, 0xBE, 0x9C, 0xDF, 0x50, 0x1F, 0x13, 0xB8, 0x92, 0xBD, 0x22, 0x48},
  78. },
  79. {
  80. []byte{0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10,
  81. 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
  82. },
  83. []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
  84. []byte{0x37, 0x52, 0x7B, 0xE0, 0x05, 0x23, 0x34, 0xB8, 0x9F, 0x0C, 0xFC, 0xCA, 0xE8, 0x7C, 0xFA, 0x20},
  85. },
  86. }
  87. func TestCipher(t *testing.T) {
  88. for n, tt := range testVectors {
  89. // Test if the plaintext (dec) is encrypts to the given
  90. // ciphertext (enc) using the given key. Test also if enc can
  91. // be decrypted again into dec.
  92. c, err := NewCipher(tt.key)
  93. if err != nil {
  94. t.Errorf("#%d: NewCipher: %v", n, err)
  95. return
  96. }
  97. buf := make([]byte, 16)
  98. c.Encrypt(buf, tt.dec)
  99. if !bytes.Equal(buf, tt.enc) {
  100. t.Errorf("#%d: encrypt = %x want %x", n, buf, tt.enc)
  101. }
  102. c.Decrypt(buf, tt.enc)
  103. if !bytes.Equal(buf, tt.dec) {
  104. t.Errorf("#%d: decrypt = %x want %x", n, buf, tt.dec)
  105. }
  106. // Test that 16 zero bytes, encrypted 1000 times then decrypted
  107. // 1000 times results in zero bytes again.
  108. zero := make([]byte, 16)
  109. buf = make([]byte, 16)
  110. for i := 0; i < 1000; i++ {
  111. c.Encrypt(buf, buf)
  112. }
  113. for i := 0; i < 1000; i++ {
  114. c.Decrypt(buf, buf)
  115. }
  116. if !bytes.Equal(buf, zero) {
  117. t.Errorf("#%d: encrypt/decrypt 1000: have %x want %x", n, buf, zero)
  118. }
  119. }
  120. }