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// Copyright 2012 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 salsa20
import (
"bytes"
"encoding/hex"
"testing"
)
func fromHex(s string) []byte {
ret, err := hex.DecodeString(s)
if err != nil {
panic(err)
}
return ret
}
// testVectors was taken from set 6 of the ECRYPT test vectors:
// http://www.ecrypt.eu.org/stream/svn/viewcvs.cgi/ecrypt/trunk/submissions/salsa20/full/verified.test-vectors?logsort=rev&rev=210&view=markup
var testVectors = []struct {
key []byte
iv []byte
numBytes int
xor []byte
}{
{
fromHex("0053A6F94C9FF24598EB3E91E4378ADD3083D6297CCF2275C81B6EC11467BA0D"),
fromHex("0D74DB42A91077DE"),
131072,
fromHex("C349B6A51A3EC9B712EAED3F90D8BCEE69B7628645F251A996F55260C62EF31FD6C6B0AEA94E136C9D984AD2DF3578F78E457527B03A0450580DD874F63B1AB9"),
},
{
fromHex("0558ABFE51A4F74A9DF04396E93C8FE23588DB2E81D4277ACD2073C6196CBF12"),
fromHex("167DE44BB21980E7"),
131072,
fromHex("C3EAAF32836BACE32D04E1124231EF47E101367D6305413A0EEB07C60698A2876E4D031870A739D6FFDDD208597AFF0A47AC17EDB0167DD67EBA84F1883D4DFD"),
},
{
fromHex("0A5DB00356A9FC4FA2F5489BEE4194E73A8DE03386D92C7FD22578CB1E71C417"),
fromHex("1F86ED54BB2289F0"),
131072,
fromHex("3CD23C3DC90201ACC0CF49B440B6C417F0DC8D8410A716D5314C059E14B1A8D9A9FB8EA3D9C8DAE12B21402F674AA95C67B1FC514E994C9D3F3A6E41DFF5BBA6"),
},
{
fromHex("0F62B5085BAE0154A7FA4DA0F34699EC3F92E5388BDE3184D72A7DD02376C91C"),
fromHex("288FF65DC42B92F9"),
131072,
fromHex("E00EBCCD70D69152725F9987982178A2E2E139C7BCBE04CA8A0E99E318D9AB76F988C8549F75ADD790BA4F81C176DA653C1A043F11A958E169B6D2319F4EEC1A"),
},
}
func TestSalsa20(t *testing.T) {
var inBuf, outBuf []byte
var key [32]byte
for i, test := range testVectors {
if test.numBytes%64 != 0 {
t.Errorf("#%d: numBytes is not a multiple of 64", i)
continue
}
if test.numBytes > len(inBuf) {
inBuf = make([]byte, test.numBytes)
outBuf = make([]byte, test.numBytes)
}
in := inBuf[:test.numBytes]
out := outBuf[:test.numBytes]
copy(key[:], test.key)
XORKeyStream(out, in, test.iv, &key)
var xor [64]byte
for len(out) > 0 {
for i := 0; i < 64; i++ {
xor[i] ^= out[i]
}
out = out[64:]
}
if !bytes.Equal(xor[:], test.xor) {
t.Errorf("#%d: bad result", i)
}
}
}
var xSalsa20TestData = []struct {
in, nonce, key, out []byte
}{
{
[]byte("Hello world!"),
[]byte("24-byte nonce for xsalsa"),
[]byte("this is 32-byte key for xsalsa20"),
[]byte{0x00, 0x2d, 0x45, 0x13, 0x84, 0x3f, 0xc2, 0x40, 0xc4, 0x01, 0xe5, 0x41},
},
{
make([]byte, 64),
[]byte("24-byte nonce for xsalsa"),
[]byte("this is 32-byte key for xsalsa20"),
[]byte{0x48, 0x48, 0x29, 0x7f, 0xeb, 0x1f, 0xb5, 0x2f, 0xb6,
0x6d, 0x81, 0x60, 0x9b, 0xd5, 0x47, 0xfa, 0xbc, 0xbe, 0x70,
0x26, 0xed, 0xc8, 0xb5, 0xe5, 0xe4, 0x49, 0xd0, 0x88, 0xbf,
0xa6, 0x9c, 0x08, 0x8f, 0x5d, 0x8d, 0xa1, 0xd7, 0x91, 0x26,
0x7c, 0x2c, 0x19, 0x5a, 0x7f, 0x8c, 0xae, 0x9c, 0x4b, 0x40,
0x50, 0xd0, 0x8c, 0xe6, 0xd3, 0xa1, 0x51, 0xec, 0x26, 0x5f,
0x3a, 0x58, 0xe4, 0x76, 0x48},
},
}
func TestXSalsa20(t *testing.T) {
var key [32]byte
for i, test := range xSalsa20TestData {
out := make([]byte, len(test.in))
copy(key[:], test.key)
XORKeyStream(out, test.in, test.nonce, &key)
if !bytes.Equal(out, test.out) {
t.Errorf("%d: expected %x, got %x", i, test.out, out)
}
}
}
var (
keyArray [32]byte
key = &keyArray
nonce [8]byte
msg = make([]byte, 1<<10)
)
func BenchmarkXOR1K(b *testing.B) {
b.StopTimer()
out := make([]byte, 1024)
b.StartTimer()
for i := 0; i < b.N; i++ {
XORKeyStream(out, msg[:1024], nonce[:], key)
}
b.SetBytes(1024)
}
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