mirror of
https://mau.dev/maunium/synapse.git
synced 2024-12-13 22:13:29 +01:00
242 lines
8.4 KiB
Python
242 lines
8.4 KiB
Python
# Copyright 2021 The Matrix.org Foundation C.I.C.
|
|
#
|
|
# 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.
|
|
|
|
from io import BytesIO
|
|
from unittest.mock import Mock
|
|
|
|
from netaddr import IPSet
|
|
|
|
from twisted.internet.error import DNSLookupError
|
|
from twisted.python.failure import Failure
|
|
from twisted.test.proto_helpers import AccumulatingProtocol
|
|
from twisted.web.client import Agent, ResponseDone
|
|
from twisted.web.iweb import UNKNOWN_LENGTH
|
|
|
|
from synapse.api.errors import SynapseError
|
|
from synapse.http.client import (
|
|
BlacklistingAgentWrapper,
|
|
BlacklistingReactorWrapper,
|
|
BodyExceededMaxSize,
|
|
read_body_with_max_size,
|
|
)
|
|
|
|
from tests.server import FakeTransport, get_clock
|
|
from tests.unittest import TestCase
|
|
|
|
|
|
class ReadBodyWithMaxSizeTests(TestCase):
|
|
def _build_response(self, length=UNKNOWN_LENGTH):
|
|
"""Start reading the body, returns the response, result and proto"""
|
|
response = Mock(length=length)
|
|
result = BytesIO()
|
|
deferred = read_body_with_max_size(response, result, 6)
|
|
|
|
# Fish the protocol out of the response.
|
|
protocol = response.deliverBody.call_args[0][0]
|
|
protocol.transport = Mock()
|
|
|
|
return result, deferred, protocol
|
|
|
|
def _assert_error(self, deferred, protocol):
|
|
"""Ensure that the expected error is received."""
|
|
self.assertIsInstance(deferred.result, Failure)
|
|
self.assertIsInstance(deferred.result.value, BodyExceededMaxSize)
|
|
protocol.transport.abortConnection.assert_called_once()
|
|
|
|
def _cleanup_error(self, deferred):
|
|
"""Ensure that the error in the Deferred is handled gracefully."""
|
|
called = [False]
|
|
|
|
def errback(f):
|
|
called[0] = True
|
|
|
|
deferred.addErrback(errback)
|
|
self.assertTrue(called[0])
|
|
|
|
def test_no_error(self):
|
|
"""A response that is NOT too large."""
|
|
result, deferred, protocol = self._build_response()
|
|
|
|
# Start sending data.
|
|
protocol.dataReceived(b"12345")
|
|
# Close the connection.
|
|
protocol.connectionLost(Failure(ResponseDone()))
|
|
|
|
self.assertEqual(result.getvalue(), b"12345")
|
|
self.assertEqual(deferred.result, 5)
|
|
|
|
def test_too_large(self):
|
|
"""A response which is too large raises an exception."""
|
|
result, deferred, protocol = self._build_response()
|
|
|
|
# Start sending data.
|
|
protocol.dataReceived(b"1234567890")
|
|
|
|
self.assertEqual(result.getvalue(), b"1234567890")
|
|
self._assert_error(deferred, protocol)
|
|
self._cleanup_error(deferred)
|
|
|
|
def test_multiple_packets(self):
|
|
"""Data should be accumulated through mutliple packets."""
|
|
result, deferred, protocol = self._build_response()
|
|
|
|
# Start sending data.
|
|
protocol.dataReceived(b"12")
|
|
protocol.dataReceived(b"34")
|
|
# Close the connection.
|
|
protocol.connectionLost(Failure(ResponseDone()))
|
|
|
|
self.assertEqual(result.getvalue(), b"1234")
|
|
self.assertEqual(deferred.result, 4)
|
|
|
|
def test_additional_data(self):
|
|
"""A connection can receive data after being closed."""
|
|
result, deferred, protocol = self._build_response()
|
|
|
|
# Start sending data.
|
|
protocol.dataReceived(b"1234567890")
|
|
self._assert_error(deferred, protocol)
|
|
|
|
# More data might have come in.
|
|
protocol.dataReceived(b"1234567890")
|
|
|
|
self.assertEqual(result.getvalue(), b"1234567890")
|
|
self._assert_error(deferred, protocol)
|
|
self._cleanup_error(deferred)
|
|
|
|
def test_content_length(self):
|
|
"""The body shouldn't be read (at all) if the Content-Length header is too large."""
|
|
result, deferred, protocol = self._build_response(length=10)
|
|
|
|
# Deferred shouldn't be called yet.
|
|
self.assertFalse(deferred.called)
|
|
|
|
# Start sending data.
|
|
protocol.dataReceived(b"12345")
|
|
self._assert_error(deferred, protocol)
|
|
self._cleanup_error(deferred)
|
|
|
|
# The data is never consumed.
|
|
self.assertEqual(result.getvalue(), b"")
|
|
|
|
|
|
class BlacklistingAgentTest(TestCase):
|
|
def setUp(self):
|
|
self.reactor, self.clock = get_clock()
|
|
|
|
self.safe_domain, self.safe_ip = b"safe.test", b"1.2.3.4"
|
|
self.unsafe_domain, self.unsafe_ip = b"danger.test", b"5.6.7.8"
|
|
self.allowed_domain, self.allowed_ip = b"allowed.test", b"5.1.1.1"
|
|
|
|
# Configure the reactor's DNS resolver.
|
|
for (domain, ip) in (
|
|
(self.safe_domain, self.safe_ip),
|
|
(self.unsafe_domain, self.unsafe_ip),
|
|
(self.allowed_domain, self.allowed_ip),
|
|
):
|
|
self.reactor.lookups[domain.decode()] = ip.decode()
|
|
self.reactor.lookups[ip.decode()] = ip.decode()
|
|
|
|
self.ip_whitelist = IPSet([self.allowed_ip.decode()])
|
|
self.ip_blacklist = IPSet(["5.0.0.0/8"])
|
|
|
|
def test_reactor(self):
|
|
"""Apply the blacklisting reactor and ensure it properly blocks connections to particular domains and IPs."""
|
|
agent = Agent(
|
|
BlacklistingReactorWrapper(
|
|
self.reactor,
|
|
ip_whitelist=self.ip_whitelist,
|
|
ip_blacklist=self.ip_blacklist,
|
|
),
|
|
)
|
|
|
|
# The unsafe domains and IPs should be rejected.
|
|
for domain in (self.unsafe_domain, self.unsafe_ip):
|
|
self.failureResultOf(
|
|
agent.request(b"GET", b"http://" + domain), DNSLookupError
|
|
)
|
|
|
|
# The safe domains IPs should be accepted.
|
|
for domain in (
|
|
self.safe_domain,
|
|
self.allowed_domain,
|
|
self.safe_ip,
|
|
self.allowed_ip,
|
|
):
|
|
d = agent.request(b"GET", b"http://" + domain)
|
|
|
|
# Grab the latest TCP connection.
|
|
(
|
|
host,
|
|
port,
|
|
client_factory,
|
|
_timeout,
|
|
_bindAddress,
|
|
) = self.reactor.tcpClients[-1]
|
|
|
|
# Make the connection and pump data through it.
|
|
client = client_factory.buildProtocol(None)
|
|
server = AccumulatingProtocol()
|
|
server.makeConnection(FakeTransport(client, self.reactor))
|
|
client.makeConnection(FakeTransport(server, self.reactor))
|
|
client.dataReceived(
|
|
b"HTTP/1.0 200 OK\r\nContent-Length: 0\r\nContent-Type: text/html\r\n\r\n"
|
|
)
|
|
|
|
response = self.successResultOf(d)
|
|
self.assertEqual(response.code, 200)
|
|
|
|
def test_agent(self):
|
|
"""Apply the blacklisting agent and ensure it properly blocks connections to particular IPs."""
|
|
agent = BlacklistingAgentWrapper(
|
|
Agent(self.reactor),
|
|
ip_whitelist=self.ip_whitelist,
|
|
ip_blacklist=self.ip_blacklist,
|
|
)
|
|
|
|
# The unsafe IPs should be rejected.
|
|
self.failureResultOf(
|
|
agent.request(b"GET", b"http://" + self.unsafe_ip), SynapseError
|
|
)
|
|
|
|
# The safe and unsafe domains and safe IPs should be accepted.
|
|
for domain in (
|
|
self.safe_domain,
|
|
self.unsafe_domain,
|
|
self.allowed_domain,
|
|
self.safe_ip,
|
|
self.allowed_ip,
|
|
):
|
|
d = agent.request(b"GET", b"http://" + domain)
|
|
|
|
# Grab the latest TCP connection.
|
|
(
|
|
host,
|
|
port,
|
|
client_factory,
|
|
_timeout,
|
|
_bindAddress,
|
|
) = self.reactor.tcpClients[-1]
|
|
|
|
# Make the connection and pump data through it.
|
|
client = client_factory.buildProtocol(None)
|
|
server = AccumulatingProtocol()
|
|
server.makeConnection(FakeTransport(client, self.reactor))
|
|
client.makeConnection(FakeTransport(server, self.reactor))
|
|
client.dataReceived(
|
|
b"HTTP/1.0 200 OK\r\nContent-Length: 0\r\nContent-Type: text/html\r\n\r\n"
|
|
)
|
|
|
|
response = self.successResultOf(d)
|
|
self.assertEqual(response.code, 200)
|