diff options
| -rw-r--r-- | changelog.d/6620.misc | 1 | ||||
| -rw-r--r-- | synapse/rest/key/v2/remote_key_resource.py | 30 | ||||
| -rw-r--r-- | tests/rest/key/v2/test_remote_key_resource.py | 130 | ||||
| -rw-r--r-- | tests/unittest.py | 11 |
4 files changed, 163 insertions, 9 deletions
diff --git a/changelog.d/6620.misc b/changelog.d/6620.misc new file mode 100644 index 0000000000..8bfb78fb20 --- /dev/null +++ b/changelog.d/6620.misc @@ -0,0 +1 @@ +Add a workaround for synapse raising exceptions when fetching the notary's own key from the notary. diff --git a/synapse/rest/key/v2/remote_key_resource.py b/synapse/rest/key/v2/remote_key_resource.py index e7fc3f0431..bf5e0eb844 100644 --- a/synapse/rest/key/v2/remote_key_resource.py +++ b/synapse/rest/key/v2/remote_key_resource.py @@ -15,6 +15,7 @@ import logging from canonicaljson import encode_canonical_json, json +from signedjson.key import encode_verify_key_base64 from signedjson.sign import sign_json from twisted.internet import defer @@ -216,15 +217,28 @@ class RemoteKey(DirectServeResource): if cache_misses and query_remote_on_cache_miss: yield self.fetcher.get_keys(cache_misses) yield self.query_keys(request, query, query_remote_on_cache_miss=False) - else: - signed_keys = [] - for key_json in json_results: - key_json = json.loads(key_json) + return + + signed_keys = [] + for key_json in json_results: + key_json = json.loads(key_json) + + # backwards-compatibility hack for #6596: if the requested key belongs + # to us, make sure that all of the signing keys appear in the + # "verify_keys" section. + if key_json["server_name"] == self.config.server_name: + verify_keys = key_json["verify_keys"] for signing_key in self.config.key_server_signing_keys: - key_json = sign_json(key_json, self.config.server_name, signing_key) + key_id = "%s:%s" % (signing_key.alg, signing_key.version) + verify_keys[key_id] = { + "key": encode_verify_key_base64(signing_key.verify_key) + } + + for signing_key in self.config.key_server_signing_keys: + key_json = sign_json(key_json, self.config.server_name, signing_key) - signed_keys.append(key_json) + signed_keys.append(key_json) - results = {"server_keys": signed_keys} + results = {"server_keys": signed_keys} - respond_with_json_bytes(request, 200, encode_canonical_json(results)) + respond_with_json_bytes(request, 200, encode_canonical_json(results)) diff --git a/tests/rest/key/v2/test_remote_key_resource.py b/tests/rest/key/v2/test_remote_key_resource.py new file mode 100644 index 0000000000..d8246b4e78 --- /dev/null +++ b/tests/rest/key/v2/test_remote_key_resource.py @@ -0,0 +1,130 @@ +# -*- coding: utf-8 -*- +# Copyright 2020 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. +import urllib.parse +from io import BytesIO + +from mock import Mock + +import signedjson.key +from nacl.signing import SigningKey +from signedjson.sign import sign_json + +from twisted.web.resource import NoResource + +from synapse.http.site import SynapseRequest +from synapse.rest.key.v2 import KeyApiV2Resource +from synapse.util.httpresourcetree import create_resource_tree + +from tests import unittest +from tests.server import FakeChannel, wait_until_result + + +class RemoteKeyResourceTestCase(unittest.HomeserverTestCase): + def make_homeserver(self, reactor, clock): + self.http_client = Mock() + return self.setup_test_homeserver(http_client=self.http_client) + + def create_test_json_resource(self): + return create_resource_tree( + {"/_matrix/key/v2": KeyApiV2Resource(self.hs)}, root_resource=NoResource() + ) + + def expect_outgoing_key_request( + self, server_name: str, signing_key: SigningKey + ) -> None: + """ + Tell the mock http client to expect an outgoing GET request for the given key + """ + + def get_json(destination, path, ignore_backoff=False, **kwargs): + self.assertTrue(ignore_backoff) + self.assertEqual(destination, server_name) + key_id = "%s:%s" % (signing_key.alg, signing_key.version) + self.assertEqual( + path, "/_matrix/key/v2/server/%s" % (urllib.parse.quote(key_id),) + ) + + response = { + "server_name": server_name, + "old_verify_keys": {}, + "valid_until_ts": 200 * 1000, + "verify_keys": { + key_id: { + "key": signedjson.key.encode_verify_key_base64( + signing_key.verify_key + ) + } + }, + } + sign_json(response, server_name, signing_key) + return response + + self.http_client.get_json.side_effect = get_json + + def make_notary_request(self, server_name: str, key_id: str) -> dict: + """Send a GET request to the test server requesting the given key. + + Checks that the response is a 200 and returns the decoded json body. + """ + channel = FakeChannel(self.site, self.reactor) + req = SynapseRequest(channel) + req.content = BytesIO(b"") + req.requestReceived( + b"GET", + b"/_matrix/key/v2/query/%s/%s" + % (server_name.encode("utf-8"), key_id.encode("utf-8")), + b"1.1", + ) + wait_until_result(self.reactor, req) + self.assertEqual(channel.code, 200) + resp = channel.json_body + return resp + + def test_get_key(self): + """Fetch a remote key""" + SERVER_NAME = "remote.server" + testkey = signedjson.key.generate_signing_key("ver1") + self.expect_outgoing_key_request(SERVER_NAME, testkey) + + resp = self.make_notary_request(SERVER_NAME, "ed25519:ver1") + keys = resp["server_keys"] + self.assertEqual(len(keys), 1) + + self.assertIn("ed25519:ver1", keys[0]["verify_keys"]) + self.assertEqual(len(keys[0]["verify_keys"]), 1) + + # it should be signed by both the origin server and the notary + self.assertIn(SERVER_NAME, keys[0]["signatures"]) + self.assertIn(self.hs.hostname, keys[0]["signatures"]) + + def test_get_own_key(self): + """Fetch our own key""" + testkey = signedjson.key.generate_signing_key("ver1") + self.expect_outgoing_key_request(self.hs.hostname, testkey) + + resp = self.make_notary_request(self.hs.hostname, "ed25519:ver1") + keys = resp["server_keys"] + self.assertEqual(len(keys), 1) + + # it should be signed by both itself, and the notary signing key + sigs = keys[0]["signatures"] + self.assertEqual(len(sigs), 1) + self.assertIn(self.hs.hostname, sigs) + oursigs = sigs[self.hs.hostname] + self.assertEqual(len(oursigs), 2) + + # and both keys should be present in the verify_keys section + self.assertIn("ed25519:ver1", keys[0]["verify_keys"]) + self.assertIn("ed25519:a_lPym", keys[0]["verify_keys"]) diff --git a/tests/unittest.py b/tests/unittest.py index b30b7d1718..cbda237278 100644 --- a/tests/unittest.py +++ b/tests/unittest.py @@ -36,7 +36,7 @@ from synapse.config.homeserver import HomeServerConfig from synapse.config.ratelimiting import FederationRateLimitConfig from synapse.federation.transport import server as federation_server from synapse.http.server import JsonResource -from synapse.http.site import SynapseRequest +from synapse.http.site import SynapseRequest, SynapseSite from synapse.logging.context import LoggingContext from synapse.server import HomeServer from synapse.types import Requester, UserID, create_requester @@ -210,6 +210,15 @@ class HomeserverTestCase(TestCase): # Register the resources self.resource = self.create_test_json_resource() + # create a site to wrap the resource. + self.site = SynapseSite( + logger_name="synapse.access.http.fake", + site_tag="test", + config={}, + resource=self.resource, + server_version_string="1", + ) + from tests.rest.client.v1.utils import RestHelper self.helper = RestHelper(self.hs, self.resource, getattr(self, "user_id", None)) |