Method test_check_hostname

Lib/test/test_ssl.py:3273–3308

(self)

                self.assertTrue(cert, "Can't get peer certificate.")

    def test_check_hostname(self):
        if support.verbose:
            sys.stdout.write("\n")

        client_context, server_context, hostname = testing_context()

        # correct hostname should verify
        server = ThreadedEchoServer(context=server_context, chatty=True)
        with server:
            with client_context.wrap_socket(socket.socket(),
                                            server_hostname=hostname) as s:
                s.connect((HOST, server.port))
                cert = s.getpeercert()
                self.assertTrue(cert, "Can't get peer certificate.")

        # incorrect hostname should raise an exception
        server = ThreadedEchoServer(context=server_context, chatty=True)
        # Allow for flexible libssl error messages.
        regex = re.compile(r"""(
            certificate verify failed   # OpenSSL
            |
            CERTIFICATE_VERIFY_FAILED   # AWS-LC
        )""", re.X)
        with server:
            with client_context.wrap_socket(socket.socket(),
                                            server_hostname="invalid") as s:
                with self.assertRaisesRegex(ssl.CertificateError, regex):
                    s.connect((HOST, server.port))

        # missing server_hostname arg should cause an exception, too
        server = ThreadedEchoServer(context=server_context, chatty=True)
        with server:
            with socket.socket() as s:
                with self.assertRaisesRegex(ValueError,
                                            "check_hostname requires server_hostname"):
                    client_context.wrap_socket(s)

    @unittest.skipUnless(
        ssl.HAS_NEVER_CHECK_COMMON_NAME, "test requires hostname_checks_common_name"