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 5package twofish 6 7import ( 8 "bytes" 9 "testing" 10) 11 12var qbox = [2][4][16]byte{ 13 { 14 {0x8, 0x1, 0x7, 0xD, 0x6, 0xF, 0x3, 0x2, 0x0, 0xB, 0x5, 0x9, 0xE, 0xC, 0xA, 0x4}, 15 {0xE, 0xC, 0xB, 0x8, 0x1, 0x2, 0x3, 0x5, 0xF, 0x4, 0xA, 0x6, 0x7, 0x0, 0x9, 0xD}, 16 {0xB, 0xA, 0x5, 0xE, 0x6, 0xD, 0x9, 0x0, 0xC, 0x8, 0xF, 0x3, 0x2, 0x4, 0x7, 0x1}, 17 {0xD, 0x7, 0xF, 0x4, 0x1, 0x2, 0x6, 0xE, 0x9, 0xB, 0x3, 0x0, 0x8, 0x5, 0xC, 0xA}, 18 }, 19 { 20 {0x2, 0x8, 0xB, 0xD, 0xF, 0x7, 0x6, 0xE, 0x3, 0x1, 0x9, 0x4, 0x0, 0xA, 0xC, 0x5}, 21 {0x1, 0xE, 0x2, 0xB, 0x4, 0xC, 0x3, 0x7, 0x6, 0xD, 0xA, 0x5, 0xF, 0x9, 0x0, 0x8}, 22 {0x4, 0xC, 0x7, 0x5, 0x1, 0x6, 0x9, 0xA, 0x0, 0xE, 0xD, 0x8, 0x2, 0xB, 0x3, 0xF}, 23 {0xB, 0x9, 0x5, 0x1, 0xC, 0x3, 0xD, 0xE, 0x6, 0x4, 0x7, 0xF, 0x2, 0x0, 0x8, 0xA}, 24 }, 25} 26 27// genSbox generates the variable sbox 28func genSbox(qi int, x byte) byte { 29 a0, b0 := x/16, x%16 30 for i := 0; i < 2; i++ { 31 a1 := a0 ^ b0 32 b1 := (a0 ^ ((b0 << 3) | (b0 >> 1)) ^ (a0 << 3)) & 15 33 a0 = qbox[qi][2*i][a1] 34 b0 = qbox[qi][2*i+1][b1] 35 } 36 return (b0 << 4) + a0 37} 38 39func TestSbox(t *testing.T) { 40 for n := range sbox { 41 for m := range sbox[n] { 42 if genSbox(n, byte(m)) != sbox[n][m] { 43 t.Errorf("#%d|%d: sbox value = %d want %d", n, m, sbox[n][m], genSbox(n, byte(m))) 44 } 45 } 46 } 47} 48 49var testVectors = []struct { 50 key []byte 51 dec []byte 52 enc []byte 53}{ 54 // These tests are extracted from LibTom 55 { 56 []byte{0x9F, 0x58, 0x9F, 0x5C, 0xF6, 0x12, 0x2C, 0x32, 0xB6, 0xBF, 0xEC, 0x2F, 0x2A, 0xE8, 0xC3, 0x5A}, 57 []byte{0xD4, 0x91, 0xDB, 0x16, 0xE7, 0xB1, 0xC3, 0x9E, 0x86, 0xCB, 0x08, 0x6B, 0x78, 0x9F, 0x54, 0x19}, 58 []byte{0x01, 0x9F, 0x98, 0x09, 0xDE, 0x17, 0x11, 0x85, 0x8F, 0xAA, 0xC3, 0xA3, 0xBA, 0x20, 0xFB, 0xC3}, 59 }, 60 { 61 []byte{0x88, 0xB2, 0xB2, 0x70, 0x6B, 0x10, 0x5E, 0x36, 0xB4, 0x46, 0xBB, 0x6D, 0x73, 0x1A, 0x1E, 0x88, 62 0xEF, 0xA7, 0x1F, 0x78, 0x89, 0x65, 0xBD, 0x44}, 63 []byte{0x39, 0xDA, 0x69, 0xD6, 0xBA, 0x49, 0x97, 0xD5, 0x85, 0xB6, 0xDC, 0x07, 0x3C, 0xA3, 0x41, 0xB2}, 64 []byte{0x18, 0x2B, 0x02, 0xD8, 0x14, 0x97, 0xEA, 0x45, 0xF9, 0xDA, 0xAC, 0xDC, 0x29, 0x19, 0x3A, 0x65}, 65 }, 66 { 67 []byte{0xD4, 0x3B, 0xB7, 0x55, 0x6E, 0xA3, 0x2E, 0x46, 0xF2, 0xA2, 0x82, 0xB7, 0xD4, 0x5B, 0x4E, 0x0D, 68 0x57, 0xFF, 0x73, 0x9D, 0x4D, 0xC9, 0x2C, 0x1B, 0xD7, 0xFC, 0x01, 0x70, 0x0C, 0xC8, 0x21, 0x6F}, 69 []byte{0x90, 0xAF, 0xE9, 0x1B, 0xB2, 0x88, 0x54, 0x4F, 0x2C, 0x32, 0xDC, 0x23, 0x9B, 0x26, 0x35, 0xE6}, 70 []byte{0x6C, 0xB4, 0x56, 0x1C, 0x40, 0xBF, 0x0A, 0x97, 0x05, 0x93, 0x1C, 0xB6, 0xD4, 0x08, 0xE7, 0xFA}, 71 }, 72 // These tests are derived from https://www.schneier.com/code/ecb_ival.txt 73 { 74 []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, 75 []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, 76 []byte{0x9F, 0x58, 0x9F, 0x5C, 0xF6, 0x12, 0x2C, 0x32, 0xB6, 0xBF, 0xEC, 0x2F, 0x2A, 0xE8, 0xC3, 0x5A}, 77 }, 78 { 79 []byte{0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10, 80 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 81 }, 82 []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, 83 []byte{0xCF, 0xD1, 0xD2, 0xE5, 0xA9, 0xBE, 0x9C, 0xDF, 0x50, 0x1F, 0x13, 0xB8, 0x92, 0xBD, 0x22, 0x48}, 84 }, 85 { 86 []byte{0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10, 87 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF, 88 }, 89 []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, 90 []byte{0x37, 0x52, 0x7B, 0xE0, 0x05, 0x23, 0x34, 0xB8, 0x9F, 0x0C, 0xFC, 0xCA, 0xE8, 0x7C, 0xFA, 0x20}, 91 }, 92} 93 94func TestCipher(t *testing.T) { 95 for n, tt := range testVectors { 96 // Test if the plaintext (dec) is encrypts to the given 97 // ciphertext (enc) using the given key. Test also if enc can 98 // be decrypted again into dec. 99 c, err := NewCipher(tt.key) 100 if err != nil { 101 t.Errorf("#%d: NewCipher: %v", n, err) 102 return 103 } 104 105 buf := make([]byte, 16) 106 c.Encrypt(buf, tt.dec) 107 if !bytes.Equal(buf, tt.enc) { 108 t.Errorf("#%d: encrypt = %x want %x", n, buf, tt.enc) 109 } 110 c.Decrypt(buf, tt.enc) 111 if !bytes.Equal(buf, tt.dec) { 112 t.Errorf("#%d: decrypt = %x want %x", n, buf, tt.dec) 113 } 114 115 // Test that 16 zero bytes, encrypted 1000 times then decrypted 116 // 1000 times results in zero bytes again. 117 zero := make([]byte, 16) 118 buf = make([]byte, 16) 119 for i := 0; i < 1000; i++ { 120 c.Encrypt(buf, buf) 121 } 122 for i := 0; i < 1000; i++ { 123 c.Decrypt(buf, buf) 124 } 125 if !bytes.Equal(buf, zero) { 126 t.Errorf("#%d: encrypt/decrypt 1000: have %x want %x", n, buf, zero) 127 } 128 } 129} 130