aboutsummaryrefslogtreecommitdiffstats
path: root/noise_test.go
blob: 3da36e978fbeb12659a28d32a3070537cfb9c89a (plain) (blame)
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
/* SPDX-License-Identifier: GPL-2.0
 *
 * Copyright (C) 2017-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 * Copyright (C) 2017-2018 Mathias N. Hall-Andersen <mathias@hall-andersen.dk>.
 */

package main

import (
	"bytes"
	"encoding/binary"
	"testing"
)

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 TestNoiseHandshake(t *testing.T) {
	dev1 := randDevice(t)
	dev2 := randDevice(t)

	defer dev1.Close()
	defer dev2.Close()

	peer1, _ := dev2.NewPeer(dev1.staticIdentity.privateKey.publicKey())
	peer2, _ := dev1.NewPeer(dev2.staticIdentity.privateKey.publicKey())

	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
	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)
	}()
}