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# Copyright (c) 2016 Red Hat, Inc
#
# 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.
import ssl
import struct
from unittest import mock
from nova.console.rfb import auth
from nova.console.rfb import authvencrypt
from nova import exception
from nova import test
class RFBAuthSchemeVeNCryptTestCase(test.NoDBTestCase):
def setUp(self):
super(RFBAuthSchemeVeNCryptTestCase, self).setUp()
self.scheme = authvencrypt.RFBAuthSchemeVeNCrypt()
self.compute_sock = mock.MagicMock()
self.compute_sock.recv.side_effect = []
self.expected_calls = []
self.flags(vencrypt_ca_certs="/certs/ca.pem", group="vnc")
def _expect_send(self, val):
self.expected_calls.append(mock.call.sendall(val))
def _expect_recv(self, amt, ret_val):
self.expected_calls.append(mock.call.recv(amt))
self.compute_sock.recv.side_effect = (
list(self.compute_sock.recv.side_effect) + [ret_val])
@mock.patch.object(ssl, "wrap_socket", return_value="wrapped")
def test_security_handshake_with_x509(self, mock_socket):
self.flags(vencrypt_client_key='/certs/keyfile',
vencrypt_client_cert='/certs/cert.pem',
group="vnc")
self._expect_recv(1, "\x00")
self._expect_recv(1, "\x02")
self._expect_send(b"\x00\x02")
self._expect_recv(1, "\x00")
self._expect_recv(1, "\x02")
subtypes_raw = [authvencrypt.AuthVeNCryptSubtype.X509NONE,
authvencrypt.AuthVeNCryptSubtype.X509VNC]
subtypes = struct.pack('!2I', *subtypes_raw)
self._expect_recv(8, subtypes)
self._expect_send(struct.pack('!I', subtypes_raw[0]))
self._expect_recv(1, "\x01")
self.assertEqual("wrapped", self.scheme.security_handshake(
self.compute_sock))
mock_socket.assert_called_once_with(
self.compute_sock,
keyfile='/certs/keyfile',
certfile='/certs/cert.pem',
server_side=False,
cert_reqs=ssl.CERT_REQUIRED,
ca_certs='/certs/ca.pem')
self.assertEqual(self.expected_calls, self.compute_sock.mock_calls)
@mock.patch.object(ssl, "wrap_socket", return_value="wrapped")
def test_security_handshake_without_x509(self, mock_socket):
self._expect_recv(1, "\x00")
self._expect_recv(1, "\x02")
self._expect_send(b"\x00\x02")
self._expect_recv(1, "\x00")
self._expect_recv(1, "\x02")
subtypes_raw = [authvencrypt.AuthVeNCryptSubtype.X509NONE,
authvencrypt.AuthVeNCryptSubtype.X509VNC]
subtypes = struct.pack('!2I', *subtypes_raw)
self._expect_recv(8, subtypes)
self._expect_send(struct.pack('!I', subtypes_raw[0]))
self._expect_recv(1, "\x01")
self.assertEqual("wrapped", self.scheme.security_handshake(
self.compute_sock))
mock_socket.assert_called_once_with(
self.compute_sock,
keyfile=None,
certfile=None,
server_side=False,
cert_reqs=ssl.CERT_REQUIRED,
ca_certs='/certs/ca.pem'
)
self.assertEqual(self.expected_calls, self.compute_sock.mock_calls)
def _test_security_handshake_fails(self):
self.assertRaises(exception.RFBAuthHandshakeFailed,
self.scheme.security_handshake,
self.compute_sock)
self.assertEqual(self.expected_calls, self.compute_sock.mock_calls)
def test_security_handshake_fails_on_low_version(self):
self._expect_recv(1, "\x00")
self._expect_recv(1, "\x01")
self._test_security_handshake_fails()
def test_security_handshake_fails_on_cant_use_version(self):
self._expect_recv(1, "\x00")
self._expect_recv(1, "\x02")
self._expect_send(b"\x00\x02")
self._expect_recv(1, "\x01")
self._test_security_handshake_fails()
def test_security_handshake_fails_on_missing_subauth(self):
self._expect_recv(1, "\x00")
self._expect_recv(1, "\x02")
self._expect_send(b"\x00\x02")
self._expect_recv(1, "\x00")
self._expect_recv(1, "\x01")
subtypes_raw = [authvencrypt.AuthVeNCryptSubtype.X509VNC]
subtypes = struct.pack('!I', *subtypes_raw)
self._expect_recv(4, subtypes)
self._test_security_handshake_fails()
def test_security_handshake_fails_on_auth_not_accepted(self):
self._expect_recv(1, "\x00")
self._expect_recv(1, "\x02")
self._expect_send(b"\x00\x02")
self._expect_recv(1, "\x00")
self._expect_recv(1, "\x02")
subtypes_raw = [authvencrypt.AuthVeNCryptSubtype.X509NONE,
authvencrypt.AuthVeNCryptSubtype.X509VNC]
subtypes = struct.pack('!2I', *subtypes_raw)
self._expect_recv(8, subtypes)
self._expect_send(struct.pack('!I', subtypes_raw[0]))
self._expect_recv(1, "\x00")
self._test_security_handshake_fails()
@mock.patch.object(ssl, "wrap_socket")
def test_security_handshake_fails_on_ssl_failure(self, mock_socket):
self._expect_recv(1, "\x00")
self._expect_recv(1, "\x02")
self._expect_send(b"\x00\x02")
self._expect_recv(1, "\x00")
self._expect_recv(1, "\x02")
subtypes_raw = [authvencrypt.AuthVeNCryptSubtype.X509NONE,
authvencrypt.AuthVeNCryptSubtype.X509VNC]
subtypes = struct.pack('!2I', *subtypes_raw)
self._expect_recv(8, subtypes)
self._expect_send(struct.pack('!I', subtypes_raw[0]))
self._expect_recv(1, "\x01")
mock_socket.side_effect = ssl.SSLError("cheese")
self._test_security_handshake_fails()
mock_socket.assert_called_once_with(
self.compute_sock,
keyfile=None,
certfile=None,
server_side=False,
cert_reqs=ssl.CERT_REQUIRED,
ca_certs='/certs/ca.pem'
)
def test_types(self):
scheme = authvencrypt.RFBAuthSchemeVeNCrypt()
self.assertEqual(auth.AuthType.VENCRYPT,
scheme.security_type())
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