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107 lines
2.6 KiB
Go
107 lines
2.6 KiB
Go
// Copyright 2010 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 cast5
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import (
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"bytes"
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"encoding/hex"
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"testing"
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)
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// This test vector is taken from RFC 2144, App B.1.
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// Since the other two test vectors are for reduced-round variants, we can't
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// use them.
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var basicTests = []struct {
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key, plainText, cipherText string
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}{
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{
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"0123456712345678234567893456789a",
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"0123456789abcdef",
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"238b4fe5847e44b2",
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},
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}
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func TestBasic(t *testing.T) {
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for i, test := range basicTests {
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key, _ := hex.DecodeString(test.key)
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plainText, _ := hex.DecodeString(test.plainText)
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expected, _ := hex.DecodeString(test.cipherText)
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c, err := NewCipher(key)
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if err != nil {
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t.Errorf("#%d: failed to create Cipher: %s", i, err)
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continue
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}
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var cipherText [BlockSize]byte
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c.Encrypt(cipherText[:], plainText)
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if !bytes.Equal(cipherText[:], expected) {
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t.Errorf("#%d: got:%x want:%x", i, cipherText, expected)
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}
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var plainTextAgain [BlockSize]byte
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c.Decrypt(plainTextAgain[:], cipherText[:])
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if !bytes.Equal(plainTextAgain[:], plainText) {
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t.Errorf("#%d: got:%x want:%x", i, plainTextAgain, plainText)
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}
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}
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}
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// TestFull performs the test specified in RFC 2144, App B.2.
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// However, due to the length of time taken, it's disabled here and a more
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// limited version is included, below.
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func TestFull(t *testing.T) {
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if testing.Short() {
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// This is too slow for normal testing
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return
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}
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a, b := iterate(1000000)
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const expectedA = "eea9d0a249fd3ba6b3436fb89d6dca92"
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const expectedB = "b2c95eb00c31ad7180ac05b8e83d696e"
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if hex.EncodeToString(a) != expectedA {
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t.Errorf("a: got:%x want:%s", a, expectedA)
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}
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if hex.EncodeToString(b) != expectedB {
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t.Errorf("b: got:%x want:%s", b, expectedB)
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}
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}
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func iterate(iterations int) ([]byte, []byte) {
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const initValueHex = "0123456712345678234567893456789a"
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initValue, _ := hex.DecodeString(initValueHex)
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var a, b [16]byte
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copy(a[:], initValue)
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copy(b[:], initValue)
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for i := 0; i < iterations; i++ {
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c, _ := NewCipher(b[:])
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c.Encrypt(a[:8], a[:8])
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c.Encrypt(a[8:], a[8:])
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c, _ = NewCipher(a[:])
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c.Encrypt(b[:8], b[:8])
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c.Encrypt(b[8:], b[8:])
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}
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return a[:], b[:]
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}
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func TestLimited(t *testing.T) {
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a, b := iterate(1000)
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const expectedA = "23f73b14b02a2ad7dfb9f2c35644798d"
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const expectedB = "e5bf37eff14c456a40b21ce369370a9f"
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if hex.EncodeToString(a) != expectedA {
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t.Errorf("a: got:%x want:%s", a, expectedA)
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}
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if hex.EncodeToString(b) != expectedB {
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t.Errorf("b: got:%x want:%s", b, expectedB)
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}
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}
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