mirror of
https://github.com/autc04/Retro68.git
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174 lines
4.6 KiB
Go
174 lines
4.6 KiB
Go
// Copyright 2009 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 rc4
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import (
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"bytes"
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"fmt"
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"testing"
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)
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type rc4Test struct {
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key, keystream []byte
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}
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var golden = []rc4Test{
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// Test vectors from the original cypherpunk posting of ARC4:
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// http://groups.google.com/group/sci.crypt/msg/10a300c9d21afca0?pli=1
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{
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[]byte{0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef},
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[]byte{0x74, 0x94, 0xc2, 0xe7, 0x10, 0x4b, 0x08, 0x79},
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},
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{
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[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
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[]byte{0xde, 0x18, 0x89, 0x41, 0xa3, 0x37, 0x5d, 0x3a},
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},
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{
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[]byte{0xef, 0x01, 0x23, 0x45},
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[]byte{0xd6, 0xa1, 0x41, 0xa7, 0xec, 0x3c, 0x38, 0xdf, 0xbd, 0x61},
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},
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// Test vectors from the Wikipedia page: http://en.wikipedia.org/wiki/RC4
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{
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[]byte{0x4b, 0x65, 0x79},
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[]byte{0xeb, 0x9f, 0x77, 0x81, 0xb7, 0x34, 0xca, 0x72, 0xa7, 0x19},
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},
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{
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[]byte{0x57, 0x69, 0x6b, 0x69},
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[]byte{0x60, 0x44, 0xdb, 0x6d, 0x41, 0xb7},
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},
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{
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[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
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[]byte{
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0xde, 0x18, 0x89, 0x41, 0xa3, 0x37, 0x5d, 0x3a,
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0x8a, 0x06, 0x1e, 0x67, 0x57, 0x6e, 0x92, 0x6d,
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0xc7, 0x1a, 0x7f, 0xa3, 0xf0, 0xcc, 0xeb, 0x97,
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0x45, 0x2b, 0x4d, 0x32, 0x27, 0x96, 0x5f, 0x9e,
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0xa8, 0xcc, 0x75, 0x07, 0x6d, 0x9f, 0xb9, 0xc5,
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0x41, 0x7a, 0xa5, 0xcb, 0x30, 0xfc, 0x22, 0x19,
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0x8b, 0x34, 0x98, 0x2d, 0xbb, 0x62, 0x9e, 0xc0,
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0x4b, 0x4f, 0x8b, 0x05, 0xa0, 0x71, 0x08, 0x50,
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0x92, 0xa0, 0xc3, 0x58, 0x4a, 0x48, 0xe4, 0xa3,
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0x0a, 0x39, 0x7b, 0x8a, 0xcd, 0x1d, 0x00, 0x9e,
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0xc8, 0x7d, 0x68, 0x11, 0xf2, 0x2c, 0xf4, 0x9c,
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0xa3, 0xe5, 0x93, 0x54, 0xb9, 0x45, 0x15, 0x35,
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0xa2, 0x18, 0x7a, 0x86, 0x42, 0x6c, 0xca, 0x7d,
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0x5e, 0x82, 0x3e, 0xba, 0x00, 0x44, 0x12, 0x67,
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0x12, 0x57, 0xb8, 0xd8, 0x60, 0xae, 0x4c, 0xbd,
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0x4c, 0x49, 0x06, 0xbb, 0xc5, 0x35, 0xef, 0xe1,
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0x58, 0x7f, 0x08, 0xdb, 0x33, 0x95, 0x5c, 0xdb,
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0xcb, 0xad, 0x9b, 0x10, 0xf5, 0x3f, 0xc4, 0xe5,
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0x2c, 0x59, 0x15, 0x65, 0x51, 0x84, 0x87, 0xfe,
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0x08, 0x4d, 0x0e, 0x3f, 0x03, 0xde, 0xbc, 0xc9,
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0xda, 0x1c, 0xe9, 0x0d, 0x08, 0x5c, 0x2d, 0x8a,
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0x19, 0xd8, 0x37, 0x30, 0x86, 0x16, 0x36, 0x92,
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0x14, 0x2b, 0xd8, 0xfc, 0x5d, 0x7a, 0x73, 0x49,
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0x6a, 0x8e, 0x59, 0xee, 0x7e, 0xcf, 0x6b, 0x94,
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0x06, 0x63, 0xf4, 0xa6, 0xbe, 0xe6, 0x5b, 0xd2,
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0xc8, 0x5c, 0x46, 0x98, 0x6c, 0x1b, 0xef, 0x34,
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0x90, 0xd3, 0x7b, 0x38, 0xda, 0x85, 0xd3, 0x2e,
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0x97, 0x39, 0xcb, 0x23, 0x4a, 0x2b, 0xe7, 0x40,
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},
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},
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}
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func testEncrypt(t *testing.T, desc string, c *Cipher, src, expect []byte) {
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dst := make([]byte, len(src))
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c.XORKeyStream(dst, src)
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for i, v := range dst {
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if v != expect[i] {
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t.Fatalf("%s: mismatch at byte %d:\nhave %x\nwant %x", desc, i, dst, expect)
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}
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}
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}
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func TestGolden(t *testing.T) {
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for gi, g := range golden {
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data := make([]byte, len(g.keystream))
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for i := range data {
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data[i] = byte(i)
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}
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expect := make([]byte, len(g.keystream))
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for i := range expect {
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expect[i] = byte(i) ^ g.keystream[i]
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}
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for size := 1; size <= len(g.keystream); size++ {
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c, err := NewCipher(g.key)
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if err != nil {
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t.Fatalf("#%d: NewCipher: %v", gi, err)
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}
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off := 0
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for off < len(g.keystream) {
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n := len(g.keystream) - off
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if n > size {
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n = size
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}
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desc := fmt.Sprintf("#%d@[%d:%d]", gi, off, off+n)
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testEncrypt(t, desc, c, data[off:off+n], expect[off:off+n])
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off += n
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}
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}
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}
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}
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func TestBlock(t *testing.T) {
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testBlock(t, (*Cipher).XORKeyStream)
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}
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// Test the pure Go version.
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// Because we have assembly for amd64, 386, and arm, this prevents
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// bitrot of the reference implementations.
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func TestBlockGeneric(t *testing.T) {
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testBlock(t, (*Cipher).xorKeyStreamGeneric)
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}
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func testBlock(t *testing.T, xor func(c *Cipher, dst, src []byte)) {
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c1a, _ := NewCipher(golden[0].key)
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c1b, _ := NewCipher(golden[1].key)
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data1 := make([]byte, 1<<20)
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for i := range data1 {
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xor(c1a, data1[i:i+1], data1[i:i+1])
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xor(c1b, data1[i:i+1], data1[i:i+1])
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}
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c2a, _ := NewCipher(golden[0].key)
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c2b, _ := NewCipher(golden[1].key)
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data2 := make([]byte, 1<<20)
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xor(c2a, data2, data2)
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xor(c2b, data2, data2)
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if !bytes.Equal(data1, data2) {
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t.Fatalf("bad block")
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}
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}
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func benchmark(b *testing.B, size int64) {
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buf := make([]byte, size)
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c, err := NewCipher(golden[0].key)
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if err != nil {
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panic(err)
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}
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b.SetBytes(size)
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for i := 0; i < b.N; i++ {
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c.XORKeyStream(buf, buf)
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}
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}
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func BenchmarkRC4_128(b *testing.B) {
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benchmark(b, 128)
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}
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func BenchmarkRC4_1K(b *testing.B) {
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benchmark(b, 1024)
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}
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func BenchmarkRC4_8K(b *testing.B) {
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benchmark(b, 8096)
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}
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