1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
*/
package device
import (
"bytes"
"encoding/binary"
"testing"
"golang.zx2c4.com/wireguard/conn"
"golang.zx2c4.com/wireguard/tun/tuntest"
)
func TestCurveWrappers(t *testing.T) {
sk1, err := newPrivateKey()
assertNil(t, err)
sk2, err := newPrivateKey()
assertNil(t, err)
pk1 := sk1.publicKey()
pk2 := sk2.publicKey()
ss1 := sk1.sharedSecret(pk2)
ss2 := sk2.sharedSecret(pk1)
if ss1 != ss2 {
t.Fatal("Failed to compute shared secet")
}
}
func randDevice(t *testing.T) *Device {
sk, err := newPrivateKey()
if err != nil {
t.Fatal(err)
}
tun := tuntest.NewChannelTUN()
logger := NewLogger(LogLevelError, "")
device := NewDevice(tun.TUN(), conn.NewDefaultBind(), logger)
device.SetPrivateKey(sk)
return device
}
func assertNil(t *testing.T, err error) {
if err != nil {
t.Fatal(err)
}
}
func assertEqual(t *testing.T, a, b []byte) {
if !bytes.Equal(a, b) {
t.Fatal(a, "!=", b)
}
}
func TestNoiseHandshake(t *testing.T) {
dev1 := randDevice(t)
dev2 := randDevice(t)
defer dev1.Close()
defer dev2.Close()
peer1, err := dev2.NewPeer(dev1.staticIdentity.privateKey.publicKey())
if err != nil {
t.Fatal(err)
}
peer2, err := dev1.NewPeer(dev2.staticIdentity.privateKey.publicKey())
if err != nil {
t.Fatal(err)
}
peer1.Start()
peer2.Start()
assertEqual(
t,
peer1.handshake.precomputedStaticStatic[:],
peer2.handshake.precomputedStaticStatic[:],
)
/* simulate handshake */
// initiation message
t.Log("exchange initiation message")
msg1, err := dev1.CreateMessageInitiation(peer2)
assertNil(t, err)
packet := make([]byte, 0, 256)
writer := bytes.NewBuffer(packet)
err = binary.Write(writer, binary.LittleEndian, msg1)
assertNil(t, err)
peer := dev2.ConsumeMessageInitiation(msg1)
if peer == nil {
t.Fatal("handshake failed at initiation message")
}
assertEqual(
t,
peer1.handshake.chainKey[:],
peer2.handshake.chainKey[:],
)
assertEqual(
t,
peer1.handshake.hash[:],
peer2.handshake.hash[:],
)
// response message
t.Log("exchange response message")
msg2, err := dev2.CreateMessageResponse(peer1)
assertNil(t, err)
peer = dev1.ConsumeMessageResponse(msg2)
if peer == nil {
t.Fatal("handshake failed at response message")
}
assertEqual(
t,
peer1.handshake.chainKey[:],
peer2.handshake.chainKey[:],
)
assertEqual(
t,
peer1.handshake.hash[:],
peer2.handshake.hash[:],
)
// key pairs
t.Log("deriving keys")
err = peer1.BeginSymmetricSession()
if err != nil {
t.Fatal("failed to derive keypair for peer 1", err)
}
err = peer2.BeginSymmetricSession()
if err != nil {
t.Fatal("failed to derive keypair for peer 2", err)
}
key1 := peer1.keypairs.next.Load()
key2 := peer2.keypairs.current
// encrypting / decryption test
t.Log("test key pairs")
func() {
testMsg := []byte("wireguard test message 1")
var err error
var out []byte
var nonce [12]byte
out = key1.send.Seal(out, nonce[:], testMsg, nil)
out, err = key2.receive.Open(out[:0], nonce[:], out, nil)
assertNil(t, err)
assertEqual(t, out, testMsg)
}()
func() {
testMsg := []byte("wireguard test message 2")
var err error
var out []byte
var nonce [12]byte
out = key2.send.Seal(out, nonce[:], testMsg, nil)
out, err = key1.receive.Open(out[:0], nonce[:], out, nil)
assertNil(t, err)
assertEqual(t, out, testMsg)
}()
}
|
