from oppy.cell.varlen import VersionsCell
from oppy.connection.definitions import V3_KEY_BITS, OPENSSL_RSA_KEY_TYPE
from oppy.connection.handshake.exceptions import (
BadHandshakeState,
HandshakeFailed,
ReceivedDestroyCell,
UnexpectedCell,
)
from oppy.crypto import util as crypto_util
from oppy.util.tools import dispatch, enum
V3State = enum(
INIT=0,
EXPECT_VERSIONS=1,
EXPECT_CERTS=2,
EXPECT_AUTH_CHALLENGE=3,
EXPECT_NETINFO=4,
DONE=5,
)
class V3FSM(object):
_response_map = {}
def __init__(self, transport):
'''
:param transport transport: the transport for the associated
connection. this is needed to get the transport's TLS cert
'''
# need the transport so we can call getPeerCertificate()
from oppy.cell.cell import Cell
from oppy.cell.definitions import PADDING_CMD_IDS
from oppy.cell.exceptions import NotEnoughBytes
from oppy.connection.handshake.v3 import V3FSM
from oppy.connection.handshake.exceptions import (
BadHandshakeState,
HandshakeFailed,
UnexpectedCell,
)
from oppy.util.tools import enum
ConnState = enum(
PENDING=0,
OPEN=1,
)
class Connection(Protocol):
'''A TLS connection to an entry node.'''
def __init__(self, relay):
'''
:param stem.descriptor.server_descriptor.RelayDescriptor relay:
relay we should create a connection to
'''
logging.debug('Creating connection to {0}'.format(relay.address))
# map all circuits using this connections
self._circuit_map = {}
self._buffer = ''
RelayExtended2Cell,
RelayTruncatedCell,
RelayDropCell,
RelayResolvedCell,
RelayExtended2Cell,
)
from oppy.util.tools import enum
CIRCUIT_WINDOW_THRESHOLD_INIT = 1000
SENDME_THRESHOLD = 900
WINDOW_SIZE = 100
CState = enum(
OPEN=0,
BUFFERING=1,
)
CircuitType = enum(
IPv4=0,
IPv6=1,
)
BACKWARD_CELL_TYPES = (
DestroyCell,
EncryptedCell,
)
IPv6 = "\x04"
# used for parsing incoming SOCKS data
VER_LEN = 1
NMETHODS_LEN = 1
CMD_LEN = 1
RSV_LEN = 1
ADDR_TYPE_LEN = 1
IPv4_LEN = 4
IPv6_LEN = 16
PORT_LEN = 2
REQUEST_HEADER_LEN = VER_LEN + CMD_LEN + RSV_LEN + ADDR_TYPE_LEN
State = enum(
HANDSHAKE=0,
REQUEST=1,
FORWARDING=2,
)
class OppySOCKSProtocol(Protocol):
'''Do SOCKS 5 handshake and forward local traffic to streams.'''
def __init__(self, circuit_manager):
self._circuit_manager = circuit_manager
self.state = State.HANDSHAKE
self.request = None
# An `oppy.stream.stream` object over which the SOCKS client's data
# will be forwarded. This will be set by the time that state has
# become forwarding
self.stream = None
RelaySendMeCell,
RelayExtendedCell,
RelayExtended2Cell,
RelayTruncatedCell,
RelayDropCell,
RelayResolvedCell,
RelayExtended2Cell,
)
from oppy.util.tools import enum
CIRCUIT_WINDOW_THRESHOLD_INIT = 1000
SENDME_THRESHOLD = 900
WINDOW_SIZE = 100
CState = enum(
OPEN=0,
BUFFERING=1,
)
CircuitType = enum(
IPv4=0,
IPv6=1,
)
BACKWARD_CELL_TYPES = (
DestroyCell,
EncryptedCell,
)
BACKWARD_RELAY_CELL_TYPES = (
RelayDataCell,
RelayEndCell,
# used for parsing incoming SOCKS data
VER_LEN = 1
NMETHODS_LEN = 1
CMD_LEN = 1
RSV_LEN = 1
ADDR_TYPE_LEN = 1
IPv4_LEN = 4
IPv6_LEN = 16
PORT_LEN = 2
REQUEST_HEADER_LEN = VER_LEN+CMD_LEN+RSV_LEN+ADDR_TYPE_LEN
State = enum(
HANDSHAKE=0,
REQUEST=1,
FORWARDING=2,
)
class OppySOCKSProtocol(Protocol):
'''Do SOCKS 5 handshake and forward local traffic to streams.'''
def __init__(self, circuit_manager):
self._circuit_manager = circuit_manager
self.state = State.HANDSHAKE
self.request = None
# An `oppy.stream.stream` object over which the SOCKS client's data
# will be forwarded. This will be set by the time that state has
# become forwarding
self.stream = None
from oppy.cell.relay import RelayDataCell
from oppy.cell.relay import RelayEndCell
from oppy.cell.relay import RelaySendMeCell
from oppy.circuit.handshake.ntorfsm import NTorFSM
from oppy.crypto.exceptions import KeyDerivationFailed, UnrecognizedCell
from oppy.path.path import PathSelector
from oppy.util.tools import dispatch, enum
CIRCUIT_WINDOW_THRESHOLD_INIT = 1000
SENDME_THRESHOLD = 900
WINDOW_SIZE = 100
CState = enum(
PENDING=0,
OPEN=1,
BUFFERING=2,
)
CType = enum(
IPv4=0,
IPv6=1,
)
class Circuit(object):
# dispatch table used to lookup handler functions for incoming cells
# filled in with the `dispatch` decorator
_response_table = {}
def test_enum(self):
e = tools.enum(OPEN=0, CLOSED=1)
self.assertEqual(e.OPEN, 0)
self.assertEqual(e.CLOSED, 1)
from oppy.cell.relay import RelaySendMeCell
from oppy.circuit.handshake.ntorfsm import NTorFSM
from oppy.crypto.exceptions import KeyDerivationFailed, UnrecognizedCell
from oppy.path.path import PathSelector
from oppy.util.tools import dispatch, enum
CIRCUIT_WINDOW_THRESHOLD_INIT = 1000
SENDME_THRESHOLD = 900
WINDOW_SIZE = 100
CState = enum(
PENDING=0,
OPEN=1,
BUFFERING=2,
)
CType = enum(
IPv4=0,
IPv6=1,
)
class Circuit(object):
# dispatch table used to lookup handler functions for incoming cells
# filled in with the `dispatch` decorator
_response_table = {}
from oppy.cell.util import LinkSpecifier
from oppy.circuit.handshake.exceptions import (
BadHandshakeState,
HandshakeFailed,
ReceivedDestroyCell,
UnexpectedCell,
)
from oppy.crypto.exceptions import UnrecognizedCell
from oppy.crypto.ntorhandshake import NTorHandshake
import oppy.crypto.util as crypto
from oppy.util.tools import dispatch, enum
State = enum(
INIT=0,
EXPECT_CREATED2=1,
EXPECT_FIRST_EXTENDED2=2,
EXPECT_SECOND_EXTENDED2=3,
DONE=4,
)
class NTorFSM(object):
'''Finite state machine to step through an ntor handshake with relays
on a circuit's path.
'''
_response_map = {}
def __init__(self, circuit_id, path, crypt_path):
'''
:param int circuit_id: id of the circuit for this ntor fsm
from oppy.circuit.handshake.exceptions import (
BadHandshakeState,
HandshakeFailed,
ReceivedDestroyCell,
UnexpectedCell,
)
from oppy.crypto.exceptions import UnrecognizedCell
from oppy.crypto.ntorhandshake import NTorHandshake
import oppy.crypto.util as crypto
from oppy.util.tools import dispatch, enum
State = enum(
INIT=0,
EXPECT_CREATED2=1,
EXPECT_FIRST_EXTENDED2=2,
EXPECT_SECOND_EXTENDED2=3,
DONE=4,
)
class NTorFSM(object):
'''Finite state machine to step through an ntor handshake with relays
on a circuit's path.
'''
_response_map = {}
def __init__(self, circuit_id, path, crypt_path):
'''
:param int circuit_id: id of the circuit for this ntor fsm
from twisted.internet.protocol import Protocol
from oppy.cell.cell import Cell
from oppy.cell.definitions import PADDING_CMD_IDS
from oppy.cell.exceptions import NotEnoughBytes
from oppy.connection.handshake.v3 import V3FSM
from oppy.connection.handshake.exceptions import (
BadHandshakeState,
HandshakeFailed,
UnexpectedCell,
)
from oppy.util.tools import enum
ConnState = enum(
PENDING=0,
OPEN=1,
)
class Connection(Protocol):
'''A TLS connection to an entry node.'''
def __init__(self, relay):
'''
:param stem.descriptor.server_descriptor.RelayDescriptor relay:
relay we should create a connection to
'''
logging.debug('Creating connection to {0}'.format(relay.address))
# map all circuits using this connections
self._circuit_map = {}
self._buffer = ''
self._relay = relay