-
Notifications
You must be signed in to change notification settings - Fork 5
Expand file tree
/
Copy pathclient_auth_test.go
More file actions
366 lines (330 loc) · 10.6 KB
/
client_auth_test.go
File metadata and controls
366 lines (330 loc) · 10.6 KB
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
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
// Copyright 2011 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 ssh
import (
"bytes"
"crypto/dsa"
"io"
"io/ioutil"
"math/big"
"strings"
"testing"
_ "crypto/sha1"
)
// private key for mock server
const testServerPrivateKey = `-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----`
const testClientPrivateKey = `-----BEGIN RSA PRIVATE KEY-----
MIIBOwIBAAJBALdGZxkXDAjsYk10ihwU6Id2KeILz1TAJuoq4tOgDWxEEGeTrcld
r/ZwVaFzjWzxaf6zQIJbfaSEAhqD5yo72+sCAwEAAQJBAK8PEVU23Wj8mV0QjwcJ
tZ4GcTUYQL7cF4+ezTCE9a1NrGnCP2RuQkHEKxuTVrxXt+6OF15/1/fuXnxKjmJC
nxkCIQDaXvPPBi0c7vAxGwNY9726x01/dNbHCE0CBtcotobxpwIhANbbQbh3JHVW
2haQh4fAG5mhesZKAGcxTyv4mQ7uMSQdAiAj+4dzMpJWdSzQ+qGHlHMIBvVHLkqB
y2VdEyF7DPCZewIhAI7GOI/6LDIFOvtPo6Bj2nNmyQ1HU6k/LRtNIXi4c9NJAiAr
rrxx26itVhJmcvoUhOjwuzSlP2bE5VHAvkGB352YBg==
-----END RSA PRIVATE KEY-----`
// keychain implements the ClientKeyring interface
type keychain struct {
keys []Signer
}
func (k *keychain) Key(i int) (PublicKey, error) {
if i < 0 || i >= len(k.keys) {
return nil, nil
}
return k.keys[i].PublicKey(), nil
}
func (k *keychain) Sign(i int, rand io.Reader, data []byte) (sig []byte, err error) {
return k.keys[i].Sign(rand, data)
}
func (k *keychain) add(key Signer) {
k.keys = append(k.keys, key)
}
func (k *keychain) loadPEM(file string) error {
buf, err := ioutil.ReadFile(file)
if err != nil {
return err
}
key, err := ParsePrivateKey(buf)
if err != nil {
return err
}
k.add(key)
return nil
}
// password implements the ClientPassword interface
type password string
func (p password) Password(user string) (string, error) {
return string(p), nil
}
type keyboardInteractive map[string]string
func (cr *keyboardInteractive) Challenge(user string, instruction string, questions []string, echos []bool) ([]string, error) {
var answers []string
for _, q := range questions {
answers = append(answers, (*cr)[q])
}
return answers, nil
}
// reused internally by tests
var (
rsaKey Signer
dsaKey Signer
clientKeychain = new(keychain)
clientPassword = password("tiger")
serverConfig = &ServerConfig{
PasswordCallback: func(conn *ServerConn, user, pass string) bool {
return user == "testuser" && pass == string(clientPassword)
},
PublicKeyCallback: func(conn *ServerConn, user, algo string, pubkey []byte) bool {
key, _ := clientKeychain.Key(0)
expected := MarshalPublicKey(key)
algoname := key.PublicKeyAlgo()
return user == "testuser" && algo == algoname && bytes.Equal(pubkey, expected)
},
KeyboardInteractiveCallback: func(conn *ServerConn, user string, client ClientKeyboardInteractive) bool {
ans, err := client.Challenge("user",
"instruction",
[]string{"question1", "question2"},
[]bool{true, true})
if err != nil {
return false
}
ok := user == "testuser" && ans[0] == "answer1" && ans[1] == "answer2"
client.Challenge("user", "motd", nil, nil)
return ok
},
}
)
func init() {
var err error
rsaKey, err = ParsePrivateKey([]byte(testServerPrivateKey))
if err != nil {
panic("unable to set private key: " + err.Error())
}
rawDSAKey := new(dsa.PrivateKey)
// taken from crypto/dsa/dsa_test.go
rawDSAKey.P, _ = new(big.Int).SetString("A9B5B793FB4785793D246BAE77E8FF63CA52F442DA763C440259919FE1BC1D6065A9350637A04F75A2F039401D49F08E066C4D275A5A65DA5684BC563C14289D7AB8A67163BFBF79D85972619AD2CFF55AB0EE77A9002B0EF96293BDD0F42685EBB2C66C327079F6C98000FBCB79AACDE1BC6F9D5C7B1A97E3D9D54ED7951FEF", 16)
rawDSAKey.Q, _ = new(big.Int).SetString("E1D3391245933D68A0714ED34BBCB7A1F422B9C1", 16)
rawDSAKey.G, _ = new(big.Int).SetString("634364FC25248933D01D1993ECABD0657CC0CB2CEED7ED2E3E8AECDFCDC4A25C3B15E9E3B163ACA2984B5539181F3EFF1A5E8903D71D5B95DA4F27202B77D2C44B430BB53741A8D59A8F86887525C9F2A6A5980A195EAA7F2FF910064301DEF89D3AA213E1FAC7768D89365318E370AF54A112EFBA9246D9158386BA1B4EEFDA", 16)
rawDSAKey.Y, _ = new(big.Int).SetString("32969E5780CFE1C849A1C276D7AEB4F38A23B591739AA2FE197349AEEBD31366AEE5EB7E6C6DDB7C57D02432B30DB5AA66D9884299FAA72568944E4EEDC92EA3FBC6F39F53412FBCC563208F7C15B737AC8910DBC2D9C9B8C001E72FDC40EB694AB1F06A5A2DBD18D9E36C66F31F566742F11EC0A52E9F7B89355C02FB5D32D2", 16)
rawDSAKey.X, _ = new(big.Int).SetString("5078D4D29795CBE76D3AACFE48C9AF0BCDBEE91A", 16)
dsaKey, err = NewSignerFromKey(rawDSAKey)
if err != nil {
panic("NewSignerFromKey: " + err.Error())
}
clientKeychain.add(rsaKey)
serverConfig.AddHostKey(rsaKey)
}
// newMockAuthServer creates a new Server bound to
// the loopback interface. The server exits after
// processing one handshake.
func newMockAuthServer(t *testing.T) string {
l, err := Listen("tcp", "127.0.0.1:0", serverConfig)
if err != nil {
t.Fatalf("unable to newMockAuthServer: %s", err)
}
go func() {
defer l.Close()
c, err := l.Accept()
if err != nil {
t.Errorf("Unable to accept incoming connection: %v", err)
return
}
if err := c.Handshake(); err != nil {
// not Errorf because this is expected to
// fail for some tests.
t.Logf("Handshaking error: %v", err)
return
}
defer c.Close()
}()
return l.Addr().String()
}
func TestClientAuthPublicKey(t *testing.T) {
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyring(clientKeychain),
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err != nil {
t.Fatalf("unable to dial remote side: %s", err)
}
c.Close()
}
func TestClientAuthPassword(t *testing.T) {
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthPassword(clientPassword),
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err != nil {
t.Fatalf("unable to dial remote side: %s", err)
}
c.Close()
}
func TestClientAuthWrongPassword(t *testing.T) {
wrongPw := password("wrong")
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthPassword(wrongPw),
ClientAuthKeyring(clientKeychain),
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err != nil {
t.Fatalf("unable to dial remote side: %s", err)
}
c.Close()
}
func TestClientAuthKeyboardInteractive(t *testing.T) {
answers := keyboardInteractive(map[string]string{
"question1": "answer1",
"question2": "answer2",
})
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyboardInteractive(&answers),
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err != nil {
t.Fatalf("unable to dial remote side: %s", err)
}
c.Close()
}
func TestClientAuthWrongKeyboardInteractive(t *testing.T) {
answers := keyboardInteractive(map[string]string{
"question1": "answer1",
"question2": "WRONG",
})
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyboardInteractive(&answers),
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err == nil {
c.Close()
t.Fatalf("wrong answers should not have authenticated with KeyboardInteractive")
}
}
// the mock server will only authenticate ssh-rsa keys
func TestClientAuthInvalidPublicKey(t *testing.T) {
kc := new(keychain)
kc.add(dsaKey)
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyring(kc),
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err == nil {
c.Close()
t.Fatalf("dsa private key should not have authenticated with rsa public key")
}
}
// the client should authenticate with the second key
func TestClientAuthRSAandDSA(t *testing.T) {
kc := new(keychain)
kc.add(dsaKey)
kc.add(rsaKey)
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyring(kc),
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err != nil {
t.Fatalf("client could not authenticate with rsa key: %v", err)
}
c.Close()
}
func TestClientHMAC(t *testing.T) {
kc := new(keychain)
kc.add(rsaKey)
for _, mac := range DefaultMACOrder {
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyring(kc),
},
Crypto: CryptoConfig{
MACs: []string{mac},
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err != nil {
t.Fatalf("client could not authenticate with mac algo %s: %v", mac, err)
}
c.Close()
}
}
// issue 4285.
func TestClientUnsupportedCipher(t *testing.T) {
kc := new(keychain)
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyring(kc),
},
Crypto: CryptoConfig{
Ciphers: []string{"aes128-cbc"}, // not currently supported
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err == nil {
t.Errorf("expected no ciphers in common")
c.Close()
}
}
func TestClientUnsupportedKex(t *testing.T) {
kc := new(keychain)
config := &ClientConfig{
User: "testuser",
Auth: []ClientAuth{
ClientAuthKeyring(kc),
},
Crypto: CryptoConfig{
KeyExchanges: []string{"diffie-hellman-group-exchange-sha256"}, // not currently supported
},
}
c, err := Dial("tcp", newMockAuthServer(t), config)
if err == nil || !strings.Contains(err.Error(), "no common algorithms") {
t.Errorf("got %v, expected 'no common algorithms'", err)
c.Close()
}
}