570 lines
18 KiB
Python
570 lines
18 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from twisted.internet import defer
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from synapse.api.urls import FEDERATION_PREFIX as PREFIX
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from synapse.api.errors import Codes, SynapseError
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from synapse.http.server import JsonResource
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from synapse.http.servlet import parse_json_object_from_request, parse_string
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from synapse.util.ratelimitutils import FederationRateLimiter
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import functools
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import logging
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import simplejson as json
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import re
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logger = logging.getLogger(__name__)
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class TransportLayerServer(JsonResource):
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"""Handles incoming federation HTTP requests"""
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def __init__(self, hs):
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self.hs = hs
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self.clock = hs.get_clock()
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super(TransportLayerServer, self).__init__(hs, canonical_json=False)
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self.authenticator = Authenticator(hs)
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self.ratelimiter = FederationRateLimiter(
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self.clock,
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window_size=hs.config.federation_rc_window_size,
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sleep_limit=hs.config.federation_rc_sleep_limit,
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sleep_msec=hs.config.federation_rc_sleep_delay,
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reject_limit=hs.config.federation_rc_reject_limit,
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concurrent_requests=hs.config.federation_rc_concurrent,
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)
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self.register_servlets()
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def register_servlets(self):
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register_servlets(
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self.hs,
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resource=self,
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ratelimiter=self.ratelimiter,
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authenticator=self.authenticator,
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)
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class Authenticator(object):
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def __init__(self, hs):
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self.keyring = hs.get_keyring()
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self.server_name = hs.hostname
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# A method just so we can pass 'self' as the authenticator to the Servlets
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@defer.inlineCallbacks
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def authenticate_request(self, request):
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json_request = {
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"method": request.method,
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"uri": request.uri,
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"destination": self.server_name,
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"signatures": {},
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}
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content = None
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origin = None
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if request.method in ["PUT", "POST"]:
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# TODO: Handle other method types? other content types?
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try:
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content_bytes = request.content.read()
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content = json.loads(content_bytes)
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json_request["content"] = content
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except:
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raise SynapseError(400, "Unable to parse JSON", Codes.BAD_JSON)
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def parse_auth_header(header_str):
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try:
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params = auth.split(" ")[1].split(",")
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param_dict = dict(kv.split("=") for kv in params)
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def strip_quotes(value):
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if value.startswith("\""):
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return value[1:-1]
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else:
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return value
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origin = strip_quotes(param_dict["origin"])
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key = strip_quotes(param_dict["key"])
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sig = strip_quotes(param_dict["sig"])
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return (origin, key, sig)
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except:
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raise SynapseError(
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400, "Malformed Authorization header", Codes.UNAUTHORIZED
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)
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auth_headers = request.requestHeaders.getRawHeaders(b"Authorization")
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if not auth_headers:
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raise SynapseError(
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401, "Missing Authorization headers", Codes.UNAUTHORIZED,
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)
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for auth in auth_headers:
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if auth.startswith("X-Matrix"):
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(origin, key, sig) = parse_auth_header(auth)
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json_request["origin"] = origin
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json_request["signatures"].setdefault(origin, {})[key] = sig
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if not json_request["signatures"]:
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raise SynapseError(
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401, "Missing Authorization headers", Codes.UNAUTHORIZED,
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)
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yield self.keyring.verify_json_for_server(origin, json_request)
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logger.info("Request from %s", origin)
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request.authenticated_entity = origin
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defer.returnValue((origin, content))
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class BaseFederationServlet(object):
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def __init__(self, handler, authenticator, ratelimiter, server_name,
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room_list_handler):
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self.handler = handler
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self.authenticator = authenticator
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self.ratelimiter = ratelimiter
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self.room_list_handler = room_list_handler
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def _wrap(self, code):
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authenticator = self.authenticator
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ratelimiter = self.ratelimiter
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@defer.inlineCallbacks
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@functools.wraps(code)
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def new_code(request, *args, **kwargs):
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try:
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(origin, content) = yield authenticator.authenticate_request(request)
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with ratelimiter.ratelimit(origin) as d:
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yield d
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response = yield code(
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origin, content, request.args, *args, **kwargs
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)
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except:
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logger.exception("authenticate_request failed")
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raise
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defer.returnValue(response)
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# Extra logic that functools.wraps() doesn't finish
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new_code.__self__ = code.__self__
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return new_code
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def register(self, server):
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pattern = re.compile("^" + PREFIX + self.PATH + "$")
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for method in ("GET", "PUT", "POST"):
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code = getattr(self, "on_%s" % (method), None)
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if code is None:
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continue
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server.register_paths(method, (pattern,), self._wrap(code))
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class FederationSendServlet(BaseFederationServlet):
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PATH = "/send/(?P<transaction_id>[^/]*)/"
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def __init__(self, handler, server_name, **kwargs):
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super(FederationSendServlet, self).__init__(
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handler, server_name=server_name, **kwargs
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)
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self.server_name = server_name
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# This is when someone is trying to send us a bunch of data.
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@defer.inlineCallbacks
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def on_PUT(self, origin, content, query, transaction_id):
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""" Called on PUT /send/<transaction_id>/
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Args:
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request (twisted.web.http.Request): The HTTP request.
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transaction_id (str): The transaction_id associated with this
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request. This is *not* None.
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Returns:
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Deferred: Results in a tuple of `(code, response)`, where
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`response` is a python dict to be converted into JSON that is
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used as the response body.
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"""
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# Parse the request
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try:
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transaction_data = content
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logger.debug(
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"Decoded %s: %s",
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transaction_id, str(transaction_data)
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)
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logger.info(
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"Received txn %s from %s. (PDUs: %d, EDUs: %d, failures: %d)",
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transaction_id, origin,
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len(transaction_data.get("pdus", [])),
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len(transaction_data.get("edus", [])),
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len(transaction_data.get("failures", [])),
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)
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# We should ideally be getting this from the security layer.
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# origin = body["origin"]
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# Add some extra data to the transaction dict that isn't included
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# in the request body.
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transaction_data.update(
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transaction_id=transaction_id,
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destination=self.server_name
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)
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except Exception as e:
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logger.exception(e)
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defer.returnValue((400, {"error": "Invalid transaction"}))
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return
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try:
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code, response = yield self.handler.on_incoming_transaction(
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transaction_data
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)
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except:
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logger.exception("on_incoming_transaction failed")
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raise
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defer.returnValue((code, response))
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class FederationPullServlet(BaseFederationServlet):
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PATH = "/pull/"
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# This is for when someone asks us for everything since version X
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def on_GET(self, origin, content, query):
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return self.handler.on_pull_request(query["origin"][0], query["v"])
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class FederationEventServlet(BaseFederationServlet):
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PATH = "/event/(?P<event_id>[^/]*)/"
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# This is when someone asks for a data item for a given server data_id pair.
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def on_GET(self, origin, content, query, event_id):
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return self.handler.on_pdu_request(origin, event_id)
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class FederationStateServlet(BaseFederationServlet):
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PATH = "/state/(?P<context>[^/]*)/"
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# This is when someone asks for all data for a given context.
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def on_GET(self, origin, content, query, context):
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return self.handler.on_context_state_request(
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origin,
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context,
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query.get("event_id", [None])[0],
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)
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class FederationBackfillServlet(BaseFederationServlet):
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PATH = "/backfill/(?P<context>[^/]*)/"
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def on_GET(self, origin, content, query, context):
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versions = query["v"]
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limits = query["limit"]
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if not limits:
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return defer.succeed((400, {"error": "Did not include limit param"}))
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limit = int(limits[-1])
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return self.handler.on_backfill_request(origin, context, versions, limit)
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class FederationQueryServlet(BaseFederationServlet):
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PATH = "/query/(?P<query_type>[^/]*)"
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# This is when we receive a server-server Query
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def on_GET(self, origin, content, query, query_type):
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return self.handler.on_query_request(
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query_type,
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{k: v[0].decode("utf-8") for k, v in query.items()}
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)
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class FederationMakeJoinServlet(BaseFederationServlet):
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PATH = "/make_join/(?P<context>[^/]*)/(?P<user_id>[^/]*)"
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@defer.inlineCallbacks
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def on_GET(self, origin, content, query, context, user_id):
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content = yield self.handler.on_make_join_request(context, user_id)
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defer.returnValue((200, content))
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class FederationMakeLeaveServlet(BaseFederationServlet):
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PATH = "/make_leave/(?P<context>[^/]*)/(?P<user_id>[^/]*)"
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@defer.inlineCallbacks
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def on_GET(self, origin, content, query, context, user_id):
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content = yield self.handler.on_make_leave_request(context, user_id)
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defer.returnValue((200, content))
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class FederationSendLeaveServlet(BaseFederationServlet):
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PATH = "/send_leave/(?P<room_id>[^/]*)/(?P<txid>[^/]*)"
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@defer.inlineCallbacks
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def on_PUT(self, origin, content, query, room_id, txid):
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content = yield self.handler.on_send_leave_request(origin, content)
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defer.returnValue((200, content))
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class FederationEventAuthServlet(BaseFederationServlet):
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PATH = "/event_auth/(?P<context>[^/]*)/(?P<event_id>[^/]*)"
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def on_GET(self, origin, content, query, context, event_id):
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return self.handler.on_event_auth(origin, context, event_id)
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class FederationSendJoinServlet(BaseFederationServlet):
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PATH = "/send_join/(?P<context>[^/]*)/(?P<event_id>[^/]*)"
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@defer.inlineCallbacks
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def on_PUT(self, origin, content, query, context, event_id):
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# TODO(paul): assert that context/event_id parsed from path actually
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# match those given in content
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content = yield self.handler.on_send_join_request(origin, content)
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defer.returnValue((200, content))
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class FederationInviteServlet(BaseFederationServlet):
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PATH = "/invite/(?P<context>[^/]*)/(?P<event_id>[^/]*)"
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@defer.inlineCallbacks
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def on_PUT(self, origin, content, query, context, event_id):
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# TODO(paul): assert that context/event_id parsed from path actually
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# match those given in content
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content = yield self.handler.on_invite_request(origin, content)
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defer.returnValue((200, content))
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class FederationThirdPartyInviteExchangeServlet(BaseFederationServlet):
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PATH = "/exchange_third_party_invite/(?P<room_id>[^/]*)"
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@defer.inlineCallbacks
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def on_PUT(self, origin, content, query, room_id):
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content = yield self.handler.on_exchange_third_party_invite_request(
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origin, room_id, content
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)
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defer.returnValue((200, content))
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class FederationClientKeysQueryServlet(BaseFederationServlet):
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PATH = "/user/keys/query"
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@defer.inlineCallbacks
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def on_POST(self, origin, content, query):
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response = yield self.handler.on_query_client_keys(origin, content)
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defer.returnValue((200, response))
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class FederationClientKeysClaimServlet(BaseFederationServlet):
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PATH = "/user/keys/claim"
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@defer.inlineCallbacks
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def on_POST(self, origin, content, query):
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response = yield self.handler.on_claim_client_keys(origin, content)
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defer.returnValue((200, response))
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class FederationQueryAuthServlet(BaseFederationServlet):
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PATH = "/query_auth/(?P<context>[^/]*)/(?P<event_id>[^/]*)"
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@defer.inlineCallbacks
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def on_POST(self, origin, content, query, context, event_id):
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new_content = yield self.handler.on_query_auth_request(
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origin, content, event_id
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)
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defer.returnValue((200, new_content))
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class FederationGetMissingEventsServlet(BaseFederationServlet):
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# TODO(paul): Why does this path alone end with "/?" optional?
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PATH = "/get_missing_events/(?P<room_id>[^/]*)/?"
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@defer.inlineCallbacks
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def on_POST(self, origin, content, query, room_id):
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limit = int(content.get("limit", 10))
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min_depth = int(content.get("min_depth", 0))
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earliest_events = content.get("earliest_events", [])
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latest_events = content.get("latest_events", [])
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content = yield self.handler.on_get_missing_events(
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origin,
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room_id=room_id,
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earliest_events=earliest_events,
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latest_events=latest_events,
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min_depth=min_depth,
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limit=limit,
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)
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defer.returnValue((200, content))
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class On3pidBindServlet(BaseFederationServlet):
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PATH = "/3pid/onbind"
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@defer.inlineCallbacks
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def on_POST(self, request):
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content = parse_json_object_from_request(request)
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if "invites" in content:
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last_exception = None
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for invite in content["invites"]:
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try:
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if "signed" not in invite or "token" not in invite["signed"]:
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message = ("Rejecting received notification of third-"
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"party invite without signed: %s" % (invite,))
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logger.info(message)
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raise SynapseError(400, message)
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yield self.handler.exchange_third_party_invite(
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invite["sender"],
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invite["mxid"],
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invite["room_id"],
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invite["signed"],
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)
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except Exception as e:
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last_exception = e
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if last_exception:
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raise last_exception
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defer.returnValue((200, {}))
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# Avoid doing remote HS authorization checks which are done by default by
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# BaseFederationServlet.
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def _wrap(self, code):
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return code
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class OpenIdUserInfo(BaseFederationServlet):
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"""
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Exchange a bearer token for information about a user.
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The response format should be compatible with:
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http://openid.net/specs/openid-connect-core-1_0.html#UserInfoResponse
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GET /openid/userinfo?access_token=ABDEFGH HTTP/1.1
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HTTP/1.1 200 OK
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Content-Type: application/json
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{
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"sub": "@userpart:example.org",
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}
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"""
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PATH = "/openid/userinfo"
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@defer.inlineCallbacks
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def on_GET(self, request):
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token = parse_string(request, "access_token")
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if token is None:
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defer.returnValue((401, {
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"errcode": "M_MISSING_TOKEN", "error": "Access Token required"
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}))
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return
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user_id = yield self.handler.on_openid_userinfo(token)
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if user_id is None:
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defer.returnValue((401, {
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"errcode": "M_UNKNOWN_TOKEN",
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"error": "Access Token unknown or expired"
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}))
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defer.returnValue((200, {"sub": user_id}))
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# Avoid doing remote HS authorization checks which are done by default by
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# BaseFederationServlet.
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def _wrap(self, code):
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return code
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class PublicRoomList(BaseFederationServlet):
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"""
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Fetch the public room list for this server.
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This API returns information in the same format as /publicRooms on the
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client API, but will only ever include local public rooms and hence is
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intended for consumption by other home servers.
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GET /publicRooms HTTP/1.1
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HTTP/1.1 200 OK
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Content-Type: application/json
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{
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"chunk": [
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{
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"aliases": [
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"#test:localhost"
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],
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"guest_can_join": false,
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"name": "test room",
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"num_joined_members": 3,
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"room_id": "!whkydVegtvatLfXmPN:localhost",
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"world_readable": false
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}
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],
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"end": "END",
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"start": "START"
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}
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"""
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PATH = "/publicRooms"
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@defer.inlineCallbacks
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def on_GET(self, origin, content, query):
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data = yield self.room_list_handler.get_local_public_room_list()
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defer.returnValue((200, data))
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SERVLET_CLASSES = (
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FederationSendServlet,
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FederationPullServlet,
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FederationEventServlet,
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FederationStateServlet,
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FederationBackfillServlet,
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FederationQueryServlet,
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FederationMakeJoinServlet,
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|
FederationMakeLeaveServlet,
|
|
FederationEventServlet,
|
|
FederationSendJoinServlet,
|
|
FederationSendLeaveServlet,
|
|
FederationInviteServlet,
|
|
FederationQueryAuthServlet,
|
|
FederationGetMissingEventsServlet,
|
|
FederationEventAuthServlet,
|
|
FederationClientKeysQueryServlet,
|
|
FederationClientKeysClaimServlet,
|
|
FederationThirdPartyInviteExchangeServlet,
|
|
On3pidBindServlet,
|
|
OpenIdUserInfo,
|
|
PublicRoomList,
|
|
)
|
|
|
|
|
|
def register_servlets(hs, resource, authenticator, ratelimiter):
|
|
for servletclass in SERVLET_CLASSES:
|
|
servletclass(
|
|
handler=hs.get_replication_layer(),
|
|
authenticator=authenticator,
|
|
ratelimiter=ratelimiter,
|
|
server_name=hs.hostname,
|
|
room_list_handler=hs.get_room_list_handler(),
|
|
).register(resource)
|