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certutils_test.py
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certutils_test.py
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"""Test routines to generate dummy certificates."""
import BaseHTTPServer
import os
import shutil
import ssl
import tempfile
import threading
import unittest
import certutils
class Server(BaseHTTPServer.HTTPServer):
def __init__(self, https_root_ca_cert_path):
BaseHTTPServer.HTTPServer.__init__(
self, ('localhost', 0), BaseHTTPServer.BaseHTTPRequestHandler)
self.socket = ssl.wrap_socket(
self.socket, certfile=https_root_ca_cert_path, server_side=True,
do_handshake_on_connect=False)
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()
class CertutilsTest(unittest.TestCase):
def _check_cert_file(self, cert_file_path, cert_str, key_str=None):
cert_load = open(cert_file_path, 'r').read()
if key_str:
expected_cert = key_str + cert_str
else:
expected_cert = cert_str
self.assertEqual(expected_cert, cert_load)
def setUp(self):
self._temp_dir = tempfile.mkdtemp(prefix='certutils_', dir='/tmp')
def tearDown(self):
if self._temp_dir:
shutil.rmtree(self._temp_dir)
def test_generate_dummy_ca_cert(self):
subject = 'testSubject'
c, _ = certutils.generate_dummy_ca_cert(subject)
c = certutils.load_cert(c)
self.assertEqual(c.get_subject().commonName, subject)
def test_get_host_cert(self):
ca_cert_path = os.path.join(self._temp_dir,'rootCA.pem')
issuer = 'testCA'
certutils.write_dummy_ca_cert(*certutils.generate_dummy_ca_cert(issuer),
cert_path=ca_cert_path)
with Server(ca_cert_path) as server:
cert_str = certutils.get_host_cert('localhost', server.server_port)
cert = certutils.load_cert(cert_str)
self.assertEqual(issuer, cert.get_subject().commonName)
def test_write_dummy_ca_cert(self):
base_path = os.path.join(self._temp_dir, 'testCA')
ca_cert_path = base_path + '.pem'
cert_path = base_path + '-cert.pem'
ca_cert_android = base_path + '-cert.cer'
ca_cert_windows = base_path + '-cert.p12'
self.assertFalse(os.path.exists(ca_cert_path))
self.assertFalse(os.path.exists(cert_path))
self.assertFalse(os.path.exists(ca_cert_android))
self.assertFalse(os.path.exists(ca_cert_windows))
c, k = certutils.generate_dummy_ca_cert()
certutils.write_dummy_ca_cert(c, k, ca_cert_path)
self._check_cert_file(ca_cert_path, c, k)
self._check_cert_file(cert_path, c)
self._check_cert_file(ca_cert_android, c)
self.assertTrue(os.path.exists(ca_cert_windows))
def test_generate_cert(self):
ca_cert_path = os.path.join(self._temp_dir, 'testCA.pem')
issuer = 'testIssuer'
certutils.write_dummy_ca_cert(
*certutils.generate_dummy_ca_cert(issuer), cert_path=ca_cert_path)
with open(ca_cert_path, 'r') as root_file:
root_string = root_file.read()
subject = 'testSubject'
cert_string = certutils.generate_cert(
root_string, '', subject)
cert = certutils.load_cert(cert_string)
self.assertEqual(issuer, cert.get_issuer().commonName)
self.assertEqual(subject, cert.get_subject().commonName)
with open(ca_cert_path, 'r') as ca_cert_file:
ca_cert_str = ca_cert_file.read()
cert_string = certutils.generate_cert(ca_cert_str, cert_string,
'host')
cert = certutils.load_cert(cert_string)
self.assertEqual(issuer, cert.get_issuer().commonName)
self.assertEqual(subject, cert.get_subject().commonName)
if __name__ == '__main__':
unittest.main()