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# Copyright (c) 2014-2017 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 abc
import enum
VERSION_LENGTH = 12
SUBTYPE_LENGTH = 4
AUTH_STATUS_FAIL = b"\x00"
AUTH_STATUS_PASS = b"\x01"
@enum.unique
class AuthType(enum.IntEnum):
INVALID = 0
NONE = 1
VNC = 2
RA2 = 5
RA2NE = 6
TIGHT = 16
ULTRA = 17
TLS = 18 # Used by VINO
VENCRYPT = 19 # Used by VeNCrypt and QEMU
SASL = 20 # SASL type used by VINO and QEMU
ARD = 30 # Apple remote desktop (screen sharing)
MSLOGON = 0xfffffffa # Used by UltraVNC
class RFBAuthScheme(metaclass=abc.ABCMeta):
@abc.abstractmethod
def security_type(self):
"""Return the security type supported by this scheme
Returns the nova.console.rfb.auth.AuthType.XX
constant representing the scheme implemented.
"""
pass
@abc.abstractmethod
def security_handshake(self, compute_sock):
"""Perform security-type-specific functionality.
This method is expected to return the socket-like
object used to communicate with the server securely.
Should raise exception.RFBAuthHandshakeFailed if
an error occurs
:param compute_sock: socket connected to the compute node instance
"""
pass
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