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
|
# Copyright (C) 2008 Robey Pointer <robeypointer@gmail.com>
#
# This file is part of paramiko.
#
# Paramiko is free software; you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation; either version 2.1 of the License, or (at your option)
# any later version.
#
# Paramiko is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Paramiko; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
Some unit tests for authenticating over a Transport.
"""
import sys
import threading
import unittest
from time import sleep
from paramiko import (
Transport,
ServerInterface,
RSAKey,
DSSKey,
BadAuthenticationType,
InteractiveQuery,
AuthenticationException,
)
from paramiko import AUTH_FAILED, AUTH_PARTIALLY_SUCCESSFUL, AUTH_SUCCESSFUL
from paramiko.py3compat import u
from .loop import LoopSocket
from .util import _support, slow
_pwd = u("\u2022")
class NullServer(ServerInterface):
paranoid_did_password = False
paranoid_did_public_key = False
paranoid_key = DSSKey.from_private_key_file(_support("test_dss.key"))
def get_allowed_auths(self, username):
if username == "slowdive":
return "publickey,password"
if username == "paranoid":
if (
not self.paranoid_did_password
and not self.paranoid_did_public_key
):
return "publickey,password"
elif self.paranoid_did_password:
return "publickey"
else:
return "password"
if username == "commie":
return "keyboard-interactive"
if username == "utf8":
return "password"
if username == "non-utf8":
return "password"
return "publickey"
def check_auth_password(self, username, password):
if (username == "slowdive") and (password == "pygmalion"):
return AUTH_SUCCESSFUL
if (username == "paranoid") and (password == "paranoid"):
# 2-part auth (even openssh doesn't support this)
self.paranoid_did_password = True
if self.paranoid_did_public_key:
return AUTH_SUCCESSFUL
return AUTH_PARTIALLY_SUCCESSFUL
if (username == "utf8") and (password == _pwd):
return AUTH_SUCCESSFUL
if (username == "non-utf8") and (password == "\xff"):
return AUTH_SUCCESSFUL
if username == "bad-server":
raise Exception("Ack!")
if username == "unresponsive-server":
sleep(5)
return AUTH_SUCCESSFUL
return AUTH_FAILED
def check_auth_publickey(self, username, key):
if (username == "paranoid") and (key == self.paranoid_key):
# 2-part auth
self.paranoid_did_public_key = True
if self.paranoid_did_password:
return AUTH_SUCCESSFUL
return AUTH_PARTIALLY_SUCCESSFUL
return AUTH_FAILED
def check_auth_interactive(self, username, submethods):
if username == "commie":
self.username = username
return InteractiveQuery(
"password", "Please enter a password.", ("Password", False)
)
return AUTH_FAILED
def check_auth_interactive_response(self, responses):
if self.username == "commie":
if (len(responses) == 1) and (responses[0] == "cat"):
return AUTH_SUCCESSFUL
return AUTH_FAILED
class AuthTest(unittest.TestCase):
def setUp(self):
self.socks = LoopSocket()
self.sockc = LoopSocket()
self.sockc.link(self.socks)
self.tc = Transport(self.sockc)
self.ts = Transport(self.socks)
def tearDown(self):
self.tc.close()
self.ts.close()
self.socks.close()
self.sockc.close()
def start_server(self):
host_key = RSAKey.from_private_key_file(_support("test_rsa.key"))
self.public_host_key = RSAKey(data=host_key.asbytes())
self.ts.add_server_key(host_key)
self.event = threading.Event()
self.server = NullServer()
self.assertTrue(not self.event.is_set())
self.ts.start_server(self.event, self.server)
def verify_finished(self):
self.event.wait(1.0)
self.assertTrue(self.event.is_set())
self.assertTrue(self.ts.is_active())
def test_1_bad_auth_type(self):
"""
verify that we get the right exception when an unsupported auth
type is requested.
"""
self.start_server()
try:
self.tc.connect(
hostkey=self.public_host_key,
username="unknown",
password="error",
)
self.assertTrue(False)
except:
etype, evalue, etb = sys.exc_info()
self.assertEqual(BadAuthenticationType, etype)
self.assertEqual(["publickey"], evalue.allowed_types)
def test_2_bad_password(self):
"""
verify that a bad password gets the right exception, and that a retry
with the right password works.
"""
self.start_server()
self.tc.connect(hostkey=self.public_host_key)
try:
self.tc.auth_password(username="slowdive", password="error")
self.assertTrue(False)
except:
etype, evalue, etb = sys.exc_info()
self.assertTrue(issubclass(etype, AuthenticationException))
self.tc.auth_password(username="slowdive", password="pygmalion")
self.verify_finished()
def test_3_multipart_auth(self):
"""
verify that multipart auth works.
"""
self.start_server()
self.tc.connect(hostkey=self.public_host_key)
remain = self.tc.auth_password(
username="paranoid", password="paranoid"
)
self.assertEqual(["publickey"], remain)
key = DSSKey.from_private_key_file(_support("test_dss.key"))
remain = self.tc.auth_publickey(username="paranoid", key=key)
self.assertEqual([], remain)
self.verify_finished()
def test_4_interactive_auth(self):
"""
verify keyboard-interactive auth works.
"""
self.start_server()
self.tc.connect(hostkey=self.public_host_key)
def handler(title, instructions, prompts):
self.got_title = title
self.got_instructions = instructions
self.got_prompts = prompts
return ["cat"]
remain = self.tc.auth_interactive("commie", handler)
self.assertEqual(self.got_title, "password")
self.assertEqual(self.got_prompts, [("Password", False)])
self.assertEqual([], remain)
self.verify_finished()
def test_5_interactive_auth_fallback(self):
"""
verify that a password auth attempt will fallback to "interactive"
if password auth isn't supported but interactive is.
"""
self.start_server()
self.tc.connect(hostkey=self.public_host_key)
remain = self.tc.auth_password("commie", "cat")
self.assertEqual([], remain)
self.verify_finished()
def test_6_auth_utf8(self):
"""
verify that utf-8 encoding happens in authentication.
"""
self.start_server()
self.tc.connect(hostkey=self.public_host_key)
remain = self.tc.auth_password("utf8", _pwd)
self.assertEqual([], remain)
self.verify_finished()
def test_7_auth_non_utf8(self):
"""
verify that non-utf-8 encoded passwords can be used for broken
servers.
"""
self.start_server()
self.tc.connect(hostkey=self.public_host_key)
remain = self.tc.auth_password("non-utf8", "\xff")
self.assertEqual([], remain)
self.verify_finished()
def test_8_auth_gets_disconnected(self):
"""
verify that we catch a server disconnecting during auth, and report
it as an auth failure.
"""
self.start_server()
self.tc.connect(hostkey=self.public_host_key)
try:
remain = self.tc.auth_password("bad-server", "hello")
except:
etype, evalue, etb = sys.exc_info()
self.assertTrue(issubclass(etype, AuthenticationException))
def test_9_auth_non_responsive(self):
"""
verify that authentication times out if server takes to long to
respond (or never responds).
"""
self.tc.auth_timeout = 1 # 1 second, to speed up test
self.start_server()
self.tc.connect()
try:
remain = self.tc.auth_password("unresponsive-server", "hello")
except:
etype, evalue, etb = sys.exc_info()
self.assertTrue(issubclass(etype, AuthenticationException))
self.assertTrue("Authentication timeout" in str(evalue))
|
