2 GoVPN -- simple secure free software virtual private network daemon
3 Copyright (C) 2014-2019 Sergey Matveev <stargrave@stargrave.org>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
31 testKey = new([32]byte)
35 io.ReadFull(rand.Reader, testKey[:])
38 func TestSymmetric(t *testing.T) {
39 nonce := make([]byte, 8)
40 f := func(data []byte, pktNum uint64) bool {
44 binary.BigEndian.PutUint64(nonce, pktNum)
45 chaffed := Chaff(testKey, nonce, data)
46 if len(chaffed) != len(data)*EnlargeFactor {
49 decoded, err := Winnow(testKey, nonce, chaffed)
53 return bytes.Compare(decoded, data) == 0
55 if err := quick.Check(f, nil); err != nil {
60 func TestSmallSize(t *testing.T) {
61 _, err := Winnow(testKey, []byte("foobar12"), []byte("foobar"))
67 func BenchmarkChaff(b *testing.B) {
68 nonce := make([]byte, 8)
69 data := make([]byte, 16)
70 io.ReadFull(rand.Reader, nonce)
71 io.ReadFull(rand.Reader, data)
73 for i := 0; i < b.N; i++ {
74 Chaff(testKey, nonce, data)
78 func BenchmarkWinnow(b *testing.B) {
79 nonce := make([]byte, 8)
80 data := make([]byte, 16)
81 io.ReadFull(rand.Reader, nonce)
82 io.ReadFull(rand.Reader, data)
83 chaffed := Chaff(testKey, nonce, data)
85 for i := 0; i < b.N; i++ {
86 Winnow(testKey, nonce, chaffed)