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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
|
// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package controlbase
import (
"context"
"encoding/binary"
"errors"
"io"
"net"
"testing"
"tailscale.com/net/memnet"
"tailscale.com/types/key"
)
// Can a reference Noise IK client talk to our server?
func TestInteropClient(t *testing.T) {
var (
s1, s2 = memnet.NewConn("noise", 128000)
controlKey = key.NewMachine()
machineKey = key.NewMachine()
serverErr = make(chan error, 2)
serverBytes = make(chan []byte, 1)
c2s = "client>server"
s2c = "server>client"
)
go func() {
server, err := Server(context.Background(), s2, controlKey, nil)
serverErr <- err
if err != nil {
return
}
var buf [1024]byte
_, err = io.ReadFull(server, buf[:len(c2s)])
serverBytes <- buf[:len(c2s)]
if err != nil {
serverErr <- err
return
}
_, err = server.Write([]byte(s2c))
serverErr <- err
}()
gotS2C, err := noiseExplorerClient(s1, controlKey.Public(), machineKey, []byte(c2s))
if err != nil {
t.Fatalf("failed client interop: %v", err)
}
if string(gotS2C) != s2c {
t.Fatalf("server sent unexpected data %q, want %q", string(gotS2C), s2c)
}
if err := <-serverErr; err != nil {
t.Fatalf("server handshake failed: %v", err)
}
if err := <-serverErr; err != nil {
t.Fatalf("server read/write failed: %v", err)
}
if got := string(<-serverBytes); got != c2s {
t.Fatalf("server received %q, want %q", got, c2s)
}
}
// Can our client talk to a reference Noise IK server?
func TestInteropServer(t *testing.T) {
var (
s1, s2 = memnet.NewConn("noise", 128000)
controlKey = key.NewMachine()
machineKey = key.NewMachine()
clientErr = make(chan error, 2)
clientBytes = make(chan []byte, 1)
c2s = "client>server"
s2c = "server>client"
)
go func() {
client, err := Client(context.Background(), s1, machineKey, controlKey.Public(), testProtocolVersion)
clientErr <- err
if err != nil {
return
}
_, err = client.Write([]byte(c2s))
if err != nil {
clientErr <- err
return
}
var buf [1024]byte
_, err = io.ReadFull(client, buf[:len(s2c)])
clientBytes <- buf[:len(s2c)]
clientErr <- err
}()
gotC2S, err := noiseExplorerServer(s2, controlKey, machineKey.Public(), []byte(s2c))
if err != nil {
t.Fatalf("failed server interop: %v", err)
}
if string(gotC2S) != c2s {
t.Fatalf("server sent unexpected data %q, want %q", string(gotC2S), c2s)
}
if err := <-clientErr; err != nil {
t.Fatalf("client handshake failed: %v", err)
}
if err := <-clientErr; err != nil {
t.Fatalf("client read/write failed: %v", err)
}
if got := string(<-clientBytes); got != s2c {
t.Fatalf("client received %q, want %q", got, s2c)
}
}
// noiseExplorerClient uses the Noise Explorer implementation of Noise
// IK to handshake as a Noise client on conn, transmit payload, and
// read+return a payload from the peer.
func noiseExplorerClient(conn net.Conn, controlKey key.MachinePublic, machineKey key.MachinePrivate, payload []byte) ([]byte, error) {
var mk keypair
copy(mk.private_key[:], machineKey.UntypedBytes())
copy(mk.public_key[:], machineKey.Public().UntypedBytes())
var peerKey [32]byte
copy(peerKey[:], controlKey.UntypedBytes())
session := InitSession(true, protocolVersionPrologue(testProtocolVersion), mk, peerKey)
_, msg1 := SendMessage(&session, nil)
var hdr [initiationHeaderLen]byte
binary.BigEndian.PutUint16(hdr[:2], testProtocolVersion)
hdr[2] = msgTypeInitiation
binary.BigEndian.PutUint16(hdr[3:5], 96)
if _, err := conn.Write(hdr[:]); err != nil {
return nil, err
}
if _, err := conn.Write(msg1.ne[:]); err != nil {
return nil, err
}
if _, err := conn.Write(msg1.ns); err != nil {
return nil, err
}
if _, err := conn.Write(msg1.ciphertext); err != nil {
return nil, err
}
var buf [1024]byte
if _, err := io.ReadFull(conn, buf[:51]); err != nil {
return nil, err
}
// ignore the header for this test, we're only checking the noise
// implementation.
msg2 := messagebuffer{
ciphertext: buf[35:51],
}
copy(msg2.ne[:], buf[3:35])
_, p, valid := RecvMessage(&session, &msg2)
if !valid {
return nil, errors.New("handshake failed")
}
if len(p) != 0 {
return nil, errors.New("non-empty payload")
}
_, msg3 := SendMessage(&session, payload)
hdr[0] = msgTypeRecord
binary.BigEndian.PutUint16(hdr[1:3], uint16(len(msg3.ciphertext)))
if _, err := conn.Write(hdr[:3]); err != nil {
return nil, err
}
if _, err := conn.Write(msg3.ciphertext); err != nil {
return nil, err
}
if _, err := io.ReadFull(conn, buf[:3]); err != nil {
return nil, err
}
// Ignore all of the header except the payload length
plen := int(binary.BigEndian.Uint16(buf[1:3]))
if _, err := io.ReadFull(conn, buf[:plen]); err != nil {
return nil, err
}
msg4 := messagebuffer{
ciphertext: buf[:plen],
}
_, p, valid = RecvMessage(&session, &msg4)
if !valid {
return nil, errors.New("transport message decryption failed")
}
return p, nil
}
func noiseExplorerServer(conn net.Conn, controlKey key.MachinePrivate, wantMachineKey key.MachinePublic, payload []byte) ([]byte, error) {
var mk keypair
copy(mk.private_key[:], controlKey.UntypedBytes())
copy(mk.public_key[:], controlKey.Public().UntypedBytes())
session := InitSession(false, protocolVersionPrologue(testProtocolVersion), mk, [32]byte{})
var buf [1024]byte
if _, err := io.ReadFull(conn, buf[:101]); err != nil {
return nil, err
}
// Ignore the header, we're just checking the noise implementation.
msg1 := messagebuffer{
ns: buf[37:85],
ciphertext: buf[85:101],
}
copy(msg1.ne[:], buf[5:37])
_, p, valid := RecvMessage(&session, &msg1)
if !valid {
return nil, errors.New("handshake failed")
}
if len(p) != 0 {
return nil, errors.New("non-empty payload")
}
_, msg2 := SendMessage(&session, nil)
var hdr [headerLen]byte
hdr[0] = msgTypeResponse
binary.BigEndian.PutUint16(hdr[1:3], 48)
if _, err := conn.Write(hdr[:]); err != nil {
return nil, err
}
if _, err := conn.Write(msg2.ne[:]); err != nil {
return nil, err
}
if _, err := conn.Write(msg2.ciphertext[:]); err != nil {
return nil, err
}
if _, err := io.ReadFull(conn, buf[:3]); err != nil {
return nil, err
}
plen := int(binary.BigEndian.Uint16(buf[1:3]))
if _, err := io.ReadFull(conn, buf[:plen]); err != nil {
return nil, err
}
msg3 := messagebuffer{
ciphertext: buf[:plen],
}
_, p, valid = RecvMessage(&session, &msg3)
if !valid {
return nil, errors.New("transport message decryption failed")
}
_, msg4 := SendMessage(&session, payload)
hdr[0] = msgTypeRecord
binary.BigEndian.PutUint16(hdr[1:3], uint16(len(msg4.ciphertext)))
if _, err := conn.Write(hdr[:]); err != nil {
return nil, err
}
if _, err := conn.Write(msg4.ciphertext); err != nil {
return nil, err
}
return p, nil
}
|
