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
|
# Copyright 2014 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Test routines to generate dummy certificates."""
import BaseHTTPServer
import shutil
import signal
import socket
import tempfile
import threading
import time
import unittest
import certutils
import sslproxy
class Client(object):
def __init__(self, ca_cert_path, verify_cb, port, host_name='foo.com',
host='localhost'):
self.host_name = host_name
self.verify_cb = verify_cb
self.ca_cert_path = ca_cert_path
self.port = port
self.host_name = host_name
self.host = host
self.connection = None
def run_request(self):
context = certutils.get_ssl_context()
context.set_verify(certutils.VERIFY_PEER, self.verify_cb) # Demand a cert
context.use_certificate_file(self.ca_cert_path)
context.load_verify_locations(self.ca_cert_path)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.connection = certutils.get_ssl_connection(context, s)
self.connection.connect((self.host, self.port))
self.connection.set_tlsext_host_name(self.host_name)
try:
self.connection.send('\r\n\r\n')
finally:
self.connection.shutdown()
self.connection.close()
class Handler(BaseHTTPServer.BaseHTTPRequestHandler):
protocol_version = 'HTTP/1.1' # override BaseHTTPServer setting
def handle_one_request(self):
"""Handle a single HTTP request."""
self.raw_requestline = self.rfile.readline(65537)
class WrappedErrorHandler(Handler):
"""Wraps handler to verify expected sslproxy errors are being raised."""
def setup(self):
Handler.setup(self)
try:
sslproxy._SetUpUsingDummyCert(self)
except certutils.Error:
self.server.error_function = certutils.Error
def finish(self):
Handler.finish(self)
self.connection.shutdown()
self.connection.close()
class DummyArchive(object):
def __init__(self):
pass
class DummyFetch(object):
def __init__(self):
self.http_archive = DummyArchive()
class Server(BaseHTTPServer.HTTPServer):
"""SSL server."""
def __init__(self, ca_cert_path, use_error_handler=False, port=0,
host='localhost'):
self.ca_cert_path = ca_cert_path
with open(ca_cert_path, 'r') as ca_file:
self.ca_cert_str = ca_file.read()
self.http_archive_fetch = DummyFetch()
if use_error_handler:
self.HANDLER = WrappedErrorHandler
else:
self.HANDLER = sslproxy.wrap_handler(Handler)
try:
BaseHTTPServer.HTTPServer.__init__(self, (host, port), self.HANDLER)
except Exception, e:
raise RuntimeError('Could not start HTTPSServer on port %d: %s'
% (port, e))
def __enter__(self):
thread = threading.Thread(target=self.serve_forever)
thread.daemon = True
thread.start()
return self
def cleanup(self):
try:
self.shutdown()
except KeyboardInterrupt:
pass
def __exit__(self, type_, value_, traceback_):
self.cleanup()
def get_certificate(self, host):
return certutils.generate_cert(self.ca_cert_str, '', host)
class TestClient(unittest.TestCase):
_temp_dir = None
def setUp(self):
self._temp_dir = tempfile.mkdtemp(prefix='sslproxy_', dir='/tmp')
self.ca_cert_path = self._temp_dir + 'testCA.pem'
self.cert_path = self._temp_dir + 'testCA-cert.cer'
self.wrong_ca_cert_path = self._temp_dir + 'wrong.pem'
self.wrong_cert_path = self._temp_dir + 'wrong-cert.cer'
# Write both pem and cer files for certificates
certutils.write_dummy_ca_cert(*certutils.generate_dummy_ca_cert(),
cert_path=self.ca_cert_path)
certutils.write_dummy_ca_cert(*certutils.generate_dummy_ca_cert(),
cert_path=self.ca_cert_path)
def tearDown(self):
if self._temp_dir:
shutil.rmtree(self._temp_dir)
def verify_cb(self, conn, cert, errnum, depth, ok):
"""A callback that verifies the certificate authentication worked.
Args:
conn: Connection object
cert: x509 object
errnum: possible error number
depth: error depth
ok: 1 if the authentication worked 0 if it didnt.
Returns:
1 or 0 depending on if the verification worked
"""
self.assertFalse(cert.has_expired())
self.assertGreater(time.strftime('%Y%m%d%H%M%SZ', time.gmtime()),
cert.get_notBefore())
return ok
def test_no_host(self):
with Server(self.ca_cert_path) as server:
c = Client(self.cert_path, self.verify_cb, server.server_port, '')
self.assertRaises(certutils.Error, c.run_request)
def test_client_connection(self):
with Server(self.ca_cert_path) as server:
c = Client(self.cert_path, self.verify_cb, server.server_port, 'foo.com')
c.run_request()
c = Client(self.cert_path, self.verify_cb, server.server_port,
'random.host')
c.run_request()
def test_wrong_cert(self):
with Server(self.ca_cert_path, True) as server:
c = Client(self.wrong_cert_path, self.verify_cb, server.server_port,
'foo.com')
self.assertRaises(certutils.Error, c.run_request)
if __name__ == '__main__':
signal.signal(signal.SIGINT, signal.SIG_DFL) # Exit on Ctrl-C
unittest.main()
|
