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93 lines
2.7 KiB
Go
93 lines
2.7 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package tea
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import (
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"bytes"
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"testing"
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)
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// A sample test key for when we just want to initialize a cipher
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var testKey = []byte{0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF}
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// Test that the block size for tea is correct
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func TestBlocksize(t *testing.T) {
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c, err := NewCipher(testKey)
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if err != nil {
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t.Fatalf("NewCipher returned error: %s", err)
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}
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if result := c.BlockSize(); result != BlockSize {
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t.Errorf("cipher.BlockSize returned %d, but expected %d", result, BlockSize)
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}
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}
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// Test that invalid key sizes return an error
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func TestInvalidKeySize(t *testing.T) {
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var key [KeySize + 1]byte
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if _, err := NewCipher(key[:]); err == nil {
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t.Errorf("invalid key size %d didn't result in an error.", len(key))
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}
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if _, err := NewCipher(key[:KeySize-1]); err == nil {
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t.Errorf("invalid key size %d didn't result in an error.", KeySize-1)
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}
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}
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// Test Vectors
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type teaTest struct {
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rounds int
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key []byte
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plaintext []byte
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ciphertext []byte
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}
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var teaTests = []teaTest{
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// These were sourced from https://github.com/froydnj/ironclad/blob/master/testing/test-vectors/tea.testvec
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{
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numRounds,
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[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
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[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
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[]byte{0x41, 0xea, 0x3a, 0x0a, 0x94, 0xba, 0xa9, 0x40},
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},
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{
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numRounds,
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[]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
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[]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
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[]byte{0x31, 0x9b, 0xbe, 0xfb, 0x01, 0x6a, 0xbd, 0xb2},
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},
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{
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16,
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[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
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[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
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[]byte{0xed, 0x28, 0x5d, 0xa1, 0x45, 0x5b, 0x33, 0xc1},
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},
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}
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// Test encryption
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func TestCipherEncrypt(t *testing.T) {
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// Test encryption with standard 64 rounds
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for i, test := range teaTests {
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c, err := NewCipherWithRounds(test.key, test.rounds)
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if err != nil {
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t.Fatalf("#%d: NewCipher returned error: %s", i, err)
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}
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var ciphertext [BlockSize]byte
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c.Encrypt(ciphertext[:], test.plaintext)
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if !bytes.Equal(ciphertext[:], test.ciphertext) {
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t.Errorf("#%d: incorrect ciphertext. Got %x, wanted %x", i, ciphertext, test.ciphertext)
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}
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var plaintext2 [BlockSize]byte
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c.Decrypt(plaintext2[:], ciphertext[:])
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if !bytes.Equal(plaintext2[:], test.plaintext) {
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t.Errorf("#%d: incorrect plaintext. Got %x, wanted %x", i, plaintext2, test.plaintext)
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}
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}
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}
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