def test_addDynamicSize(self):
d = Defragmenter()
d.addDynamicSize(10, 2, 2)
ret = d.getMessage()
self.assertIsNone(ret)
d.addData(10, bytearray(
b'\xee\xee' + # header bytes
b'\x00\x00' + # remaining length
# next message
b'\xff\xff' + # header bytes
b'\x00\x01' + # remaining length
b'\xf0'))
ret = d.getMessage()
self.assertIsNotNone(ret)
msgType, data = ret
self.assertEqual(10, msgType)
self.assertEqual(bytearray(b'\xee\xee\x00\x00'), data)
ret = d.getMessage()
self.assertIsNotNone(ret)
msgType, data = ret
self.assertEqual(10, msgType)
self.assertEqual(bytearray(b'\xff\xff\x00\x01\xf0'), data)
ret = d.getMessage()
self.assertIsNone(ret)
def process(self, state):
"""Connect to a server"""
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(5)
sock.connect((self.hostname, self.port))
defragmenter = Defragmenter()
defragmenter.addStaticSize(ContentType.alert, 2)
defragmenter.addStaticSize(ContentType.change_cipher_spec, 1)
defragmenter.addDynamicSize(ContentType.handshake, 1, 3)
state.msg_sock = MessageSocket(sock, defragmenter)
state.msg_sock.version = self.version
def process(self, state):
"""Connect to a server"""
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(5)
sock.connect((self.hostname, self.port))
defragmenter = Defragmenter()
defragmenter.addStaticSize(ContentType.alert, 2)
defragmenter.addStaticSize(ContentType.change_cipher_spec, 1)
defragmenter.addDynamicSize(ContentType.handshake, 1, 3)
state.msg_sock = MessageSocket(sock, defragmenter)
state.msg_sock.version = self.version
def test_addDynamicSize_with_incomplete_payload(self):
d = Defragmenter()
d.addDynamicSize(10, 2, 2)
d.addData(10, bytearray(b'\xee\xee\x00\x01'))
self.assertIsNone(d.getMessage())
d.addData(10, bytearray(b'\x99'))
msgType, data = d.getMessage()
self.assertEqual(10, msgType)
self.assertEqual(bytearray(b'\xee\xee\x00\x01\x99'), data)
def process(self, state):
"""Connect to a server."""
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(5)
sock.connect((self.hostname, self.port))
# disable Nagle - we handle buffering and flushing ourselves
sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
# allow for later buffering of writes to the socket
sock = BufferedSocket(sock)
defragmenter = Defragmenter()
defragmenter.addStaticSize(ContentType.alert, 2)
defragmenter.addStaticSize(ContentType.change_cipher_spec, 1)
defragmenter.addDynamicSize(ContentType.handshake, 1, 3)
state.msg_sock = MessageSocket(sock, defragmenter)
state.msg_sock.version = self.version
def test_addDynamicSize_with_two_streams(self):
d = Defragmenter()
d.addDynamicSize(9, 0, 3)
d.addDynamicSize(10, 2, 2)
d.addData(10, bytearray(b'\x44\x44\x00\x04'))
d.addData(9, bytearray(b'\x00\x00\x02'))
self.assertIsNone(d.getMessage())
d.addData(9, bytearray(b'\x09'*2))
d.addData(10, bytearray(b'\x10'*4))
msgType, data = d.getMessage()
self.assertEqual(msgType, 9)
self.assertEqual(data, bytearray(b'\x00\x00\x02\x09\x09'))
msgType, data = d.getMessage()
self.assertEqual(msgType, 10)
self.assertEqual(data, bytearray(b'\x44'*2 + b'\x00\x04' + b'\x10'*4))
def test_addDynamicSize_with_incomplete_header(self):
d = Defragmenter()
d.addDynamicSize(10, 2, 2)
d.addData(10, bytearray(b'\xee'))
self.assertIsNone(d.getMessage())
d.addData(10, bytearray(b'\xee'))
self.assertIsNone(d.getMessage())
d.addData(10, bytearray(b'\x00'))
self.assertIsNone(d.getMessage())
d.addData(10, bytearray(b'\x00'))
ret = d.getMessage()
self.assertIsNotNone(ret)
msgType, data = ret
self.assertEqual(10, msgType)
self.assertEqual(bytearray(b'\xee\xee\x00\x00'), data)
def test_addDynamicSize_with_invalid_offset(self):
d = Defragmenter()
with self.assertRaises(ValueError):
d.addDynamicSize(1, -1, 2)
def test_addDynamicSize_with_double_type(self):
d = Defragmenter()
d.addDynamicSize(1, 0, 1)
with self.assertRaises(ValueError):
d.addDynamicSize(1, 2, 2)
def scan(self):
"""Perform a scan on server."""
defragger = Defragmenter()
defragger.addStaticSize(ContentType.change_cipher_spec, 1)
defragger.addStaticSize(ContentType.alert, 2)
defragger.addDynamicSize(ContentType.handshake, 1, 3)
try:
raw_sock = socket.create_connection((self.host, self.port), 5)
except socket.error as e:
return [e]
sock = MessageSocket(raw_sock, defragger)
if self.hostname is not None:
client_hello = self.hello_gen(bytearray(self.hostname, 'utf-8'))
else:
client_hello = self.hello_gen(None)
# record layer version - TLSv1.x
# use the version from configuration, if present, or default to the
# RFC recommended (3, 1) for TLS and (3, 0) for SSLv3
if hasattr(client_hello, 'record_version'):
sock.version = client_hello.record_version
elif hasattr(self.hello_gen, 'record_version'):
sock.version = self.hello_gen.record_version
elif client_hello.client_version > (3, 1): # TLS1.0
sock.version = (3, 1)
else:
sock.version = client_hello.client_version
# we don't want to send invalid messages (SSLv2 hello in SSL record
# layer), so set the record layer version to SSLv2 if the hello is
# of SSLv2 format
if client_hello.ssl2:
sock.version = (0, 2)
# save the record version used in the end for later analysis
client_hello.record_version = sock.version
messages = [client_hello]
handshake_parser = HandshakeParser()
try:
sock.sendMessageBlocking(client_hello)
except socket.error as e:
messages.append(e)
return messages
except TLSAbruptCloseError as e:
sock.sock.close()
messages.append(e)
return messages
# get all the server messages that affect connection, abort as soon
# as they've been read
try:
while True:
header, parser = sock.recvMessageBlocking()
if header.type == ContentType.alert:
alert = Alert()
alert.parse(parser)
alert.record_version = header.version
messages += [alert]
elif header.type == ContentType.handshake:
msg = handshake_parser.parse(parser)
msg.record_version = header.version
messages += [msg]
if isinstance(msg, ServerHelloDone):
return messages
else:
raise TypeError("Unknown content type: {0}".format(
header.type))
except (TLSAbruptCloseError, TLSIllegalParameterException, ValueError,
TypeError, socket.error, SyntaxError) as e:
messages += [e]
return messages
finally:
try:
sock.sock.close()
except (socket.error, OSError):
pass
def scan(self):
"""Perform a scan on server."""
defragger = Defragmenter()
defragger.addStaticSize(ContentType.change_cipher_spec, 1)
defragger.addStaticSize(ContentType.alert, 2)
defragger.addDynamicSize(ContentType.handshake, 1, 3)
try:
raw_sock = socket.create_connection((self.host, self.port), 5)
except socket.error as e:
return [e]
sock = MessageSocket(raw_sock, defragger)
if self.hostname is not None:
client_hello = self.hello_gen(bytearray(self.hostname,
'utf-8'))
else:
client_hello = self.hello_gen(None)
# record layer version - TLSv1.x
# use the version from configuration, if present, or default to the
# RFC recommended (3, 1) for TLS and (3, 0) for SSLv3
if hasattr(client_hello, 'record_version'):
sock.version = client_hello.record_version
elif hasattr(self.hello_gen, 'record_version'):
sock.version = self.hello_gen.record_version
elif client_hello.client_version > (3, 1): # TLS1.0
sock.version = (3, 1)
else:
sock.version = client_hello.client_version
# we don't want to send invalid messages (SSLv2 hello in SSL record
# layer), so set the record layer version to SSLv2 if the hello is
# of SSLv2 format
if client_hello.ssl2:
sock.version = (0, 2)
# save the record version used in the end for later analysis
client_hello.record_version = sock.version
messages = [client_hello]
handshake_parser = HandshakeParser()
try:
sock.sendMessageBlocking(client_hello)
except socket.error as e:
messages.append(e)
return messages
except TLSAbruptCloseError as e:
sock.sock.close()
messages.append(e)
return messages
# get all the server messages that affect connection, abort as soon
# as they've been read
try:
while True:
header, parser = sock.recvMessageBlocking()
if header.type == ContentType.alert:
alert = Alert()
alert.parse(parser)
alert.record_version = header.version
messages += [alert]
elif header.type == ContentType.handshake:
msg = handshake_parser.parse(parser)
msg.record_version = header.version
messages += [msg]
if isinstance(msg, ServerHelloDone):
return messages
else:
raise TypeError("Unknown content type: {0}"
.format(header.type))
except (TLSAbruptCloseError, TLSIllegalParameterException,
ValueError, TypeError, socket.error, SyntaxError) as e:
messages += [e]
return messages
finally:
try:
sock.sock.close()
except (socket.error, OSError):
pass
