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
|
# Copyright (C) 2003-2007 Robey Pointer <robeypointer@gmail.com>
# Copyright (C) 2013-2014 science + computing ag
# Author: Sebastian Deiss <sebastian.deiss@t-online.de>
#
#
# 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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
Unit Tests for the GSS-API / SSPI SSHv2 Authentication (gssapi-with-mic)
"""
import socket
import threading
import paramiko
from .util import _support, needs_gssapi, KerberosTestCase, update_env
from .test_client import FINGERPRINTS
class NullServer(paramiko.ServerInterface):
def get_allowed_auths(self, username):
return "gssapi-with-mic,publickey"
def check_auth_gssapi_with_mic(
self, username, gss_authenticated=paramiko.AUTH_FAILED, cc_file=None
):
if gss_authenticated == paramiko.AUTH_SUCCESSFUL:
return paramiko.AUTH_SUCCESSFUL
return paramiko.AUTH_FAILED
def enable_auth_gssapi(self):
return True
def check_auth_publickey(self, username, key):
try:
expected = FINGERPRINTS[key.get_name()]
except KeyError:
return paramiko.AUTH_FAILED
else:
if key.get_fingerprint() == expected:
return paramiko.AUTH_SUCCESSFUL
return paramiko.AUTH_FAILED
def check_channel_request(self, kind, chanid):
return paramiko.OPEN_SUCCEEDED
def check_channel_exec_request(self, channel, command):
if command != b"yes":
return False
return True
@needs_gssapi
class GSSAuthTest(KerberosTestCase):
def setUp(self):
# TODO: username and targ_name should come from os.environ or whatever
# the approved pytest method is for runtime-configuring test data.
self.username = self.realm.user_princ
self.hostname = socket.getfqdn(self.realm.hostname)
self.sockl = socket.socket()
self.sockl.bind((self.realm.hostname, 0))
self.sockl.listen(1)
self.addr, self.port = self.sockl.getsockname()
self.event = threading.Event()
update_env(self, self.realm.env)
thread = threading.Thread(target=self._run)
thread.start()
def tearDown(self):
for attr in "tc ts socks sockl".split():
if hasattr(self, attr):
getattr(self, attr).close()
def _run(self):
self.socks, addr = self.sockl.accept()
self.ts = paramiko.Transport(self.socks)
host_key = paramiko.RSAKey.from_private_key_file("tests/test_rsa.key")
self.ts.add_server_key(host_key)
server = NullServer()
self.ts.start_server(self.event, server)
def _test_connection(self, **kwargs):
"""
(Most) kwargs get passed directly into SSHClient.connect().
The exception is ... no exception yet
"""
host_key = paramiko.RSAKey.from_private_key_file("tests/test_rsa.key")
public_host_key = paramiko.RSAKey(data=host_key.asbytes())
self.tc = paramiko.SSHClient()
self.tc.set_missing_host_key_policy(paramiko.WarningPolicy())
self.tc.get_host_keys().add(
f"[{self.addr}]:{self.port}", "ssh-rsa", public_host_key
)
self.tc.connect(
hostname=self.addr,
port=self.port,
username=self.username,
gss_host=self.hostname,
gss_auth=True,
**kwargs,
)
self.event.wait(1.0)
self.assert_(self.event.is_set())
self.assert_(self.ts.is_active())
self.assertEquals(self.username, self.ts.get_username())
self.assertEquals(True, self.ts.is_authenticated())
stdin, stdout, stderr = self.tc.exec_command("yes")
schan = self.ts.accept(1.0)
schan.send("Hello there.\n")
schan.send_stderr("This is on stderr.\n")
schan.close()
self.assertEquals("Hello there.\n", stdout.readline())
self.assertEquals("", stdout.readline())
self.assertEquals("This is on stderr.\n", stderr.readline())
self.assertEquals("", stderr.readline())
stdin.close()
stdout.close()
stderr.close()
def test_gss_auth(self):
"""
Verify that Paramiko can handle SSHv2 GSS-API / SSPI authentication
(gssapi-with-mic) in client and server mode.
"""
self._test_connection(allow_agent=False, look_for_keys=False)
def test_auth_trickledown(self):
"""
Failed gssapi-with-mic doesn't prevent subsequent key from succeeding
"""
self.hostname = (
"this_host_does_not_exists_and_causes_a_GSSAPI-exception"
)
self._test_connection(
key_filename=[_support("test_rsa.key")],
allow_agent=False,
look_for_keys=False,
)
|
