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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package xtea
import (
"testing"
)
// A sample test key for when we just want to initialise a cipher
var testKey = []byte{0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF}
// Test that the block size for XTEA is correct
func TestBlocksize(t *testing.T) {
if BlockSize != 8 {
t.Errorf("BlockSize constant - expected 8, got %d", BlockSize)
return
}
c, err := NewCipher(testKey)
if err != nil {
t.Errorf("NewCipher(%d bytes) = %s", len(testKey), err)
return
}
result := c.BlockSize()
if result != 8 {
t.Errorf("BlockSize function - expected 8, gotr %d", result)
return
}
}
// A series of test values to confirm that the Cipher.table array was initialised correctly
var testTable = []uint32{
0x00112233, 0x6B1568B8, 0xE28CE030, 0xC5089E2D, 0xC5089E2D, 0x1EFBD3A2, 0xA7845C2A, 0x78EF0917,
0x78EF0917, 0x172682D0, 0x5B6AC714, 0x822AC955, 0x3DE68511, 0xDC1DFECA, 0x2062430E, 0x3611343F,
0xF1CCEFFB, 0x900469B4, 0xD448ADF8, 0x2E3BE36D, 0xB6C46BF5, 0x994029F2, 0x994029F2, 0xF3335F67,
0x6AAAD6DF, 0x4D2694DC, 0x4D2694DC, 0xEB5E0E95, 0x2FA252D9, 0x4551440A, 0x121E10D6, 0xB0558A8F,
0xE388BDC3, 0x0A48C004, 0xC6047BC0, 0x643BF579, 0xA88039BD, 0x02736F32, 0x8AFBF7BA, 0x5C66A4A7,
0x5C66A4A7, 0xC76AEB2C, 0x3EE262A4, 0x215E20A1, 0x215E20A1, 0x7B515616, 0x03D9DE9E, 0x1988CFCF,
0xD5448B8B, 0x737C0544, 0xB7C04988, 0xDE804BC9, 0x9A3C0785, 0x3873813E, 0x7CB7C582, 0xD6AAFAF7,
0x4E22726F, 0x309E306C, 0x309E306C, 0x8A9165E1, 0x1319EE69, 0xF595AC66, 0xF595AC66, 0x4F88E1DB,
}
// Test that the cipher context is initialised correctly
func TestCipherInit(t *testing.T) {
c, err := NewCipher(testKey)
if err != nil {
t.Errorf("NewCipher(%d bytes) = %s", len(testKey), err)
return
}
for i := 0; i < len(c.table); i++ {
if c.table[i] != testTable[i] {
t.Errorf("NewCipher() failed to initialise Cipher.table[%d] correctly. Expected %08X, got %08X", i, testTable[i], c.table[i])
break
}
}
}
// Test that invalid key sizes return an error
func TestInvalidKeySize(t *testing.T) {
// Test a long key
key := []byte{
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
}
_, err := NewCipher(key)
if err == nil {
t.Errorf("Invalid key size %d didn't result in an error.", len(key))
}
// Test a short key
key = []byte{0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77}
_, err = NewCipher(key)
if err == nil {
t.Errorf("Invalid key size %d didn't result in an error.", len(key))
}
}
// Test that we can correctly decode some bytes we have encoded
func TestEncodeDecode(t *testing.T) {
original := []byte{0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF}
input := original
output := make([]byte, BlockSize)
c, err := NewCipher(testKey)
if err != nil {
t.Errorf("NewCipher(%d bytes) = %s", len(testKey), err)
return
}
// Encrypt the input block
c.Encrypt(output, input)
// Check that the output does not match the input
differs := false
for i := 0; i < len(input); i++ {
if output[i] != input[i] {
differs = true
break
}
}
if differs == false {
t.Error("Cipher.Encrypt: Failed to encrypt the input block.")
return
}
// Decrypt the block we just encrypted
input = output
output = make([]byte, BlockSize)
c.Decrypt(output, input)
// Check that the output from decrypt matches our initial input
for i := 0; i < len(input); i++ {
if output[i] != original[i] {
t.Errorf("Decrypted byte %d differed. Expected %02X, got %02X\n", i, original[i], output[i])
return
}
}
}
// Test Vectors
type CryptTest struct {
key []byte
plainText []byte
cipherText []byte
}
var CryptTests = []CryptTest{
// These were sourced from http://www.freemedialibrary.com/index.php/XTEA_test_vectors
{
[]byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f},
[]byte{0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48},
[]byte{0x49, 0x7d, 0xf3, 0xd0, 0x72, 0x61, 0x2c, 0xb5},
},
{
[]byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f},
[]byte{0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41},
[]byte{0xe7, 0x8f, 0x2d, 0x13, 0x74, 0x43, 0x41, 0xd8},
},
{
[]byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f},
[]byte{0x5a, 0x5b, 0x6e, 0x27, 0x89, 0x48, 0xd7, 0x7f},
[]byte{0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41},
},
{
[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
[]byte{0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48},
[]byte{0xa0, 0x39, 0x05, 0x89, 0xf8, 0xb8, 0xef, 0xa5},
},
{
[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
[]byte{0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41},
[]byte{0xed, 0x23, 0x37, 0x5a, 0x82, 0x1a, 0x8c, 0x2d},
},
{
[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
[]byte{0x70, 0xe1, 0x22, 0x5d, 0x6e, 0x4e, 0x76, 0x55},
[]byte{0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41},
},
// These vectors are from http://wiki.secondlife.com/wiki/XTEA_Strong_Encryption_Implementation#Bouncy_Castle_C.23_API
{
[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
[]byte{0xDE, 0xE9, 0xD4, 0xD8, 0xF7, 0x13, 0x1E, 0xD9},
},
{
[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
[]byte{0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08},
[]byte{0x06, 0x5C, 0x1B, 0x89, 0x75, 0xC6, 0xA8, 0x16},
},
{
[]byte{0x01, 0x23, 0x45, 0x67, 0x12, 0x34, 0x56, 0x78, 0x23, 0x45, 0x67, 0x89, 0x34, 0x56, 0x78, 0x9A},
[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
[]byte{0x1F, 0xF9, 0xA0, 0x26, 0x1A, 0xC6, 0x42, 0x64},
},
{
[]byte{0x01, 0x23, 0x45, 0x67, 0x12, 0x34, 0x56, 0x78, 0x23, 0x45, 0x67, 0x89, 0x34, 0x56, 0x78, 0x9A},
[]byte{0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08},
[]byte{0x8C, 0x67, 0x15, 0x5B, 0x2E, 0xF9, 0x1E, 0xAD},
},
}
// Test encryption
func TestCipherEncrypt(t *testing.T) {
for i, tt := range CryptTests {
c, err := NewCipher(tt.key)
if err != nil {
t.Errorf("NewCipher(%d bytes), vector %d = %s", len(tt.key), i, err)
continue
}
out := make([]byte, len(tt.plainText))
c.Encrypt(out, tt.plainText)
for j := 0; j < len(out); j++ {
if out[j] != tt.cipherText[j] {
t.Errorf("Cipher.Encrypt %d: out[%d] = %02X, expected %02X", i, j, out[j], tt.cipherText[j])
break
}
}
}
}
// Test decryption
func TestCipherDecrypt(t *testing.T) {
for i, tt := range CryptTests {
c, err := NewCipher(tt.key)
if err != nil {
t.Errorf("NewCipher(%d bytes), vector %d = %s", len(tt.key), i, err)
continue
}
out := make([]byte, len(tt.cipherText))
c.Decrypt(out, tt.cipherText)
for j := 0; j < len(out); j++ {
if out[j] != tt.plainText[j] {
t.Errorf("Cipher.Decrypt %d: out[%d] = %02X, expected %02X", i, j, out[j], tt.plainText[j])
break
}
}
}
}
// Test resetting the cipher context
func TestReset(t *testing.T) {
c, err := NewCipher(testKey)
if err != nil {
t.Errorf("NewCipher(%d bytes) = %s", len(testKey), err)
return
}
c.Reset()
for i := 0; i < len(c.table); i++ {
if c.table[i] != 0 {
t.Errorf("Cipher.Reset: Failed to clear Cipher.table[%d]. expected 0, got %08X", i, c.table[i])
return
}
}
}
|
