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# -*- coding: utf-8 -*-
# Copyright 2017 New Vector Ltd.
#
# 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 time
from mock import Mock
import signedjson.key
import signedjson.sign
from twisted.internet import defer
from synapse.api.errors import SynapseError
from synapse.crypto import keyring
from synapse.util import logcontext
from synapse.util.logcontext import LoggingContext
from tests import unittest
class MockPerspectiveServer(object):
def __init__(self):
self.server_name = "mock_server"
self.key = signedjson.key.generate_signing_key(0)
def get_verify_keys(self):
vk = signedjson.key.get_verify_key(self.key)
return {"%s:%s" % (vk.alg, vk.version): vk}
def get_signed_key(self, server_name, verify_key):
key_id = "%s:%s" % (verify_key.alg, verify_key.version)
res = {
"server_name": server_name,
"old_verify_keys": {},
"valid_until_ts": time.time() * 1000 + 3600,
"verify_keys": {
key_id: {"key": signedjson.key.encode_verify_key_base64(verify_key)}
},
}
signedjson.sign.sign_json(res, self.server_name, self.key)
return res
class KeyringTestCase(unittest.HomeserverTestCase):
def make_homeserver(self, reactor, clock):
self.mock_perspective_server = MockPerspectiveServer()
self.http_client = Mock()
hs = self.setup_test_homeserver(handlers=None, http_client=self.http_client)
keys = self.mock_perspective_server.get_verify_keys()
hs.config.perspectives = {self.mock_perspective_server.server_name: keys}
return hs
def check_context(self, _, expected):
self.assertEquals(
getattr(LoggingContext.current_context(), "request", None), expected
)
def test_wait_for_previous_lookups(self):
kr = keyring.Keyring(self.hs)
lookup_1_deferred = defer.Deferred()
lookup_2_deferred = defer.Deferred()
# we run the lookup in a logcontext so that the patched inlineCallbacks can check
# it is doing the right thing with logcontexts.
wait_1_deferred = run_in_context(
kr.wait_for_previous_lookups, ["server1"], {"server1": lookup_1_deferred}
)
# there were no previous lookups, so the deferred should be ready
self.successResultOf(wait_1_deferred)
# set off another wait. It should block because the first lookup
# hasn't yet completed.
wait_2_deferred = run_in_context(
kr.wait_for_previous_lookups, ["server1"], {"server1": lookup_2_deferred}
)
self.assertFalse(wait_2_deferred.called)
# let the first lookup complete (in the sentinel context)
lookup_1_deferred.callback(None)
# now the second wait should complete.
self.successResultOf(wait_2_deferred)
def test_verify_json_objects_for_server_awaits_previous_requests(self):
key1 = signedjson.key.generate_signing_key(1)
kr = keyring.Keyring(self.hs)
json1 = {}
signedjson.sign.sign_json(json1, "server10", key1)
persp_resp = {
"server_keys": [
self.mock_perspective_server.get_signed_key(
"server10", signedjson.key.get_verify_key(key1)
)
]
}
persp_deferred = defer.Deferred()
@defer.inlineCallbacks
def get_perspectives(**kwargs):
self.assertEquals(LoggingContext.current_context().request, "11")
with logcontext.PreserveLoggingContext():
yield persp_deferred
defer.returnValue(persp_resp)
self.http_client.post_json.side_effect = get_perspectives
# start off a first set of lookups
@defer.inlineCallbacks
def first_lookup():
with LoggingContext("11") as context_11:
context_11.request = "11"
res_deferreds = kr.verify_json_objects_for_server(
[("server10", json1), ("server11", {})]
)
# the unsigned json should be rejected pretty quickly
self.assertTrue(res_deferreds[1].called)
try:
yield res_deferreds[1]
self.assertFalse("unsigned json didn't cause a failure")
except SynapseError:
pass
self.assertFalse(res_deferreds[0].called)
res_deferreds[0].addBoth(self.check_context, None)
yield logcontext.make_deferred_yieldable(res_deferreds[0])
# let verify_json_objects_for_server finish its work before we kill the
# logcontext
yield self.clock.sleep(0)
d0 = first_lookup()
# wait a tick for it to send the request to the perspectives server
# (it first tries the datastore)
self.pump()
self.http_client.post_json.assert_called_once()
# a second request for a server with outstanding requests
# should block rather than start a second call
@defer.inlineCallbacks
def second_lookup():
with LoggingContext("12") as context_12:
context_12.request = "12"
self.http_client.post_json.reset_mock()
self.http_client.post_json.return_value = defer.Deferred()
res_deferreds_2 = kr.verify_json_objects_for_server(
[("server10", json1, )]
)
res_deferreds_2[0].addBoth(self.check_context, None)
yield logcontext.make_deferred_yieldable(res_deferreds_2[0])
# let verify_json_objects_for_server finish its work before we kill the
# logcontext
yield self.clock.sleep(0)
d2 = second_lookup()
self.pump()
self.http_client.post_json.assert_not_called()
# complete the first request
persp_deferred.callback(persp_resp)
self.get_success(d0)
self.get_success(d2)
def test_verify_json_for_server(self):
kr = keyring.Keyring(self.hs)
key1 = signedjson.key.generate_signing_key(1)
r = self.hs.datastore.store_server_verify_key(
"server9", "", time.time() * 1000, signedjson.key.get_verify_key(key1)
)
self.get_success(r)
json1 = {}
signedjson.sign.sign_json(json1, "server9", key1)
# should fail immediately on an unsigned object
d = _verify_json_for_server(kr, "server9", {})
self.failureResultOf(d, SynapseError)
d = _verify_json_for_server(kr, "server9", json1)
self.assertFalse(d.called)
self.get_success(d)
@defer.inlineCallbacks
def run_in_context(f, *args, **kwargs):
with LoggingContext("testctx"):
rv = yield f(*args, **kwargs)
defer.returnValue(rv)
def _verify_json_for_server(keyring, server_name, json_object):
"""thin wrapper around verify_json_for_server which makes sure it is wrapped
with the patched defer.inlineCallbacks.
"""
@defer.inlineCallbacks
def v():
rv1 = yield keyring.verify_json_for_server(server_name, json_object)
defer.returnValue(rv1)
return run_in_context(v)
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