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Merge pull request #43 from matrix-org/rejections

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Rejections
This commit is contained in:
Erik Johnston 2015-01-30 16:11:14 +00:00
commit 7d897f5bfc
16 changed files with 708 additions and 172 deletions
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40
synapse/api/auth.py
View File

@ -102,6 +102,8 @@ class Auth(object):
def check_host_in_room(self, room_id, host):
curr_state = yield self.state.get_current_state(room_id)
logger.debug("Got curr_state %s", curr_state)
for event in curr_state:
if event.type == EventTypes.Member:
try:
@ -358,9 +360,23 @@ class Auth(object):
def add_auth_events(self, builder, context):
yield run_on_reactor()
if builder.type == EventTypes.Create:
builder.auth_events = []
return
auth_ids = self.compute_auth_events(builder, context)
auth_events_entries = yield self.store.add_event_hashes(
auth_ids
)
builder.auth_events = auth_events_entries
context.auth_events = {
k: v
for k, v in context.current_state.items()
if v.event_id in auth_ids
}
def compute_auth_events(self, event, context):
if event.type == EventTypes.Create:
return []
auth_ids = []
@ -373,7 +389,7 @@ class Auth(object):
key = (EventTypes.JoinRules, "", )
join_rule_event = context.current_state.get(key)
key = (EventTypes.Member, builder.user_id, )
key = (EventTypes.Member, event.user_id, )
member_event = context.current_state.get(key)
key = (EventTypes.Create, "", )
@ -387,8 +403,8 @@ class Auth(object):
else:
is_public = False
if builder.type == EventTypes.Member:
e_type = builder.content["membership"]
if event.type == EventTypes.Member:
e_type = event.content["membership"]
if e_type in [Membership.JOIN, Membership.INVITE]:
if join_rule_event:
auth_ids.append(join_rule_event.event_id)
@ -403,17 +419,7 @@ class Auth(object):
if member_event.content["membership"] == Membership.JOIN:
auth_ids.append(member_event.event_id)
auth_events_entries = yield self.store.add_event_hashes(
auth_ids
)
builder.auth_events = auth_events_entries
context.auth_events = {
k: v
for k, v in context.current_state.items()
if v.event_id in auth_ids
}
return auth_ids
@log_function
def _can_send_event(self, event, auth_events):

6
synapse/api/constants.py
View File

@ -74,3 +74,9 @@ class EventTypes(object):
Message = "m.room.message"
Topic = "m.room.topic"
Name = "m.room.name"
class RejectedReason(object):
AUTH_ERROR = "auth_error"
REPLACED = "replaced"
NOT_ANCESTOR = "not_ancestor"

7
synapse/crypto/keyclient.py
View File

@ -61,9 +61,11 @@ class SynapseKeyClientProtocol(HTTPClient):
def __init__(self):
self.remote_key = defer.Deferred()
self.host = None
def connectionMade(self):
logger.debug("Connected to %s", self.transport.getHost())
self.host = self.transport.getHost()
logger.debug("Connected to %s", self.host)
self.sendCommand(b"GET", b"/_matrix/key/v1/")
self.endHeaders()
self.timer = reactor.callLater(
@ -92,8 +94,7 @@ class SynapseKeyClientProtocol(HTTPClient):
self.timer.cancel()
def on_timeout(self):
logger.debug("Timeout waiting for response from %s",
self.transport.getHost())
logger.debug("Timeout waiting for response from %s", self.host)
self.remote_key.errback(IOError("Timeout waiting for response"))
self.transport.abortConnection()

2
synapse/events/__init__.py
View File

@ -18,7 +18,7 @@ from synapse.util.frozenutils import freeze, unfreeze
class _EventInternalMetadata(object):
def __init__(self, internal_metadata_dict):
self.__dict__ = internal_metadata_dict
self.__dict__ = dict(internal_metadata_dict)
def get_dict(self):
return dict(self.__dict__)

5
synapse/events/builder.py
View File

@ -23,14 +23,15 @@ import copy
class EventBuilder(EventBase):
def __init__(self, key_values={}):
def __init__(self, key_values={}, internal_metadata_dict={}):
signatures = copy.deepcopy(key_values.pop("signatures", {}))
unsigned = copy.deepcopy(key_values.pop("unsigned", {}))
super(EventBuilder, self).__init__(
key_values,
signatures=signatures,
unsigned=unsigned
unsigned=unsigned,
internal_metadata_dict=internal_metadata_dict,
)
def build(self):

11
synapse/events/utils.py
View File

@ -45,12 +45,14 @@ def prune_event(event):
"membership",
]
event_dict = event.get_dict()
new_content = {}
def add_fields(*fields):
for field in fields:
if field in event.content:
new_content[field] = event.content[field]
new_content[field] = event_dict["content"][field]
if event_type == EventTypes.Member:
add_fields("membership")
@ -75,7 +77,7 @@ def prune_event(event):
allowed_fields = {
k: v
for k, v in event.get_dict().items()
for k, v in event_dict.items()
if k in allowed_keys
}
@ -86,7 +88,10 @@ def prune_event(event):
if "age_ts" in event.unsigned:
allowed_fields["unsigned"]["age_ts"] = event.unsigned["age_ts"]
return type(event)(allowed_fields)
return type(event)(
allowed_fields,
internal_metadata_dict=event.internal_metadata.get_dict()
)
def format_event_raw(d):

142
synapse/federation/federation_client.py
View File

@ -20,6 +20,13 @@ from .units import Edu
from synapse.util.logutils import log_function
from synapse.events import FrozenEvent
from synapse.events.utils import prune_event
from syutil.jsonutil import encode_canonical_json
from synapse.crypto.event_signing import check_event_content_hash
from synapse.api.errors import SynapseError
import logging
@ -126,6 +133,11 @@ class FederationClient(object):
for p in transaction_data["pdus"]
]
for i, pdu in enumerate(pdus):
pdus[i] = yield self._check_sigs_and_hash(pdu)
# FIXME: We should handle signature failures more gracefully.
defer.returnValue(pdus)
@defer.inlineCallbacks
@ -159,6 +171,22 @@ class FederationClient(object):
transaction_data = yield self.transport_layer.get_event(
destination, event_id
)
logger.debug("transaction_data %r", transaction_data)
pdu_list = [
self.event_from_pdu_json(p, outlier=outlier)
for p in transaction_data["pdus"]
]
if pdu_list:
pdu = pdu_list[0]
# Check signatures are correct.
pdu = yield self._check_sigs_and_hash(pdu)
break
except Exception as e:
logger.info(
"Failed to get PDU %s from %s because %s",
@ -166,18 +194,6 @@ class FederationClient(object):
)
continue
logger.debug("transaction_data %r", transaction_data)
pdu_list = [
self.event_from_pdu_json(p, outlier=outlier)
for p in transaction_data["pdus"]
]
if pdu_list:
pdu = pdu_list[0]
# TODO: We need to check signatures here
break
defer.returnValue(pdu)
@defer.inlineCallbacks
@ -208,6 +224,16 @@ class FederationClient(object):
for p in result.get("auth_chain", [])
]
for i, pdu in enumerate(pdus):
pdus[i] = yield self._check_sigs_and_hash(pdu)
# FIXME: We should handle signature failures more gracefully.
for i, pdu in enumerate(auth_chain):
auth_chain[i] = yield self._check_sigs_and_hash(pdu)
# FIXME: We should handle signature failures more gracefully.
defer.returnValue((pdus, auth_chain))
@defer.inlineCallbacks
@ -222,6 +248,11 @@ class FederationClient(object):
for p in res["auth_chain"]
]
for i, pdu in enumerate(auth_chain):
auth_chain[i] = yield self._check_sigs_and_hash(pdu)
# FIXME: We should handle signature failures more gracefully.
auth_chain.sort(key=lambda e: e.depth)
defer.returnValue(auth_chain)
@ -260,6 +291,16 @@ class FederationClient(object):
for p in content.get("auth_chain", [])
]
for i, pdu in enumerate(state):
state[i] = yield self._check_sigs_and_hash(pdu)
# FIXME: We should handle signature failures more gracefully.
for i, pdu in enumerate(auth_chain):
auth_chain[i] = yield self._check_sigs_and_hash(pdu)
# FIXME: We should handle signature failures more gracefully.
auth_chain.sort(key=lambda e: e.depth)
defer.returnValue({
@ -281,7 +322,48 @@ class FederationClient(object):
logger.debug("Got response to send_invite: %s", pdu_dict)
defer.returnValue(self.event_from_pdu_json(pdu_dict))
pdu = self.event_from_pdu_json(pdu_dict)
# Check signatures are correct.
pdu = yield self._check_sigs_and_hash(pdu)
# FIXME: We should handle signature failures more gracefully.
defer.returnValue(pdu)
@defer.inlineCallbacks
def query_auth(self, destination, room_id, event_id, local_auth):
"""
Params:
destination (str)
event_it (str)
local_auth (list)
"""
time_now = self._clock.time_msec()
send_content = {
"auth_chain": [e.get_pdu_json(time_now) for e in local_auth],
}
code, content = yield self.transport_layer.send_query_auth(
destination=destination,
room_id=room_id,
event_id=event_id,
content=send_content,
)
auth_chain = [
(yield self._check_sigs_and_hash(self.event_from_pdu_json(e)))
for e in content["auth_chain"]
]
ret = {
"auth_chain": auth_chain,
"rejects": content.get("rejects", []),
"missing": content.get("missing", []),
}
defer.returnValue(ret)
def event_from_pdu_json(self, pdu_json, outlier=False):
event = FrozenEvent(
@ -291,3 +373,37 @@ class FederationClient(object):
event.internal_metadata.outlier = outlier
return event
@defer.inlineCallbacks
def _check_sigs_and_hash(self, pdu):
"""Throws a SynapseError if the PDU does not have the correct
signatures.
Returns:
FrozenEvent: Either the given event or it redacted if it failed the
content hash check.
"""
# Check signatures are correct.
redacted_event = prune_event(pdu)
redacted_pdu_json = redacted_event.get_pdu_json()
try:
yield self.keyring.verify_json_for_server(
pdu.origin, redacted_pdu_json
)
except SynapseError:
logger.warn(
"Signature check failed for %s redacted to %s",
encode_canonical_json(pdu.get_pdu_json()),
encode_canonical_json(redacted_pdu_json),
)
raise
if not check_event_content_hash(pdu):
logger.warn(
"Event content has been tampered, redacting %s, %s",
pdu.event_id, encode_canonical_json(pdu.get_dict())
)
defer.returnValue(redacted_event)
defer.returnValue(pdu)

141
synapse/federation/federation_server.py
View File

@ -21,6 +21,13 @@ from .units import Transaction, Edu
from synapse.util.logutils import log_function
from synapse.util.logcontext import PreserveLoggingContext
from synapse.events import FrozenEvent
from synapse.events.utils import prune_event
from syutil.jsonutil import encode_canonical_json
from synapse.crypto.event_signing import check_event_content_hash
from synapse.api.errors import FederationError, SynapseError
import logging
@ -97,8 +104,10 @@ class FederationServer(object):
response = yield self.transaction_actions.have_responded(transaction)
if response:
logger.debug("[%s] We've already responed to this request",
transaction.transaction_id)
logger.debug(
"[%s] We've already responed to this request",
transaction.transaction_id
)
defer.returnValue(response)
return
@ -221,6 +230,54 @@ class FederationServer(object):
"auth_chain": [a.get_pdu_json(time_now) for a in auth_pdus],
}))
@defer.inlineCallbacks
def on_query_auth_request(self, origin, content, event_id):
"""
Content is a dict with keys::
auth_chain (list): A list of events that give the auth chain.
missing (list): A list of event_ids indicating what the other
side (`origin`) think we're missing.
rejects (dict): A mapping from event_id to a 2-tuple of reason
string and a proof (or None) of why the event was rejected.
The keys of this dict give the list of events the `origin` has
rejected.
Args:
origin (str)
content (dict)
event_id (str)
Returns:
Deferred: Results in `dict` with the same format as `content`
"""
auth_chain = [
(yield self._check_sigs_and_hash(self.event_from_pdu_json(e)))
for e in content["auth_chain"]
]
missing = [
(yield self._check_sigs_and_hash(self.event_from_pdu_json(e)))
for e in content.get("missing", [])
]
ret = yield self.handler.on_query_auth(
origin, event_id, auth_chain, content.get("rejects", []), missing
)
time_now = self._clock.time_msec()
send_content = {
"auth_chain": [
e.get_pdu_json(time_now)
for e in ret["auth_chain"]
],
"rejects": ret.get("rejects", []),
"missing": ret.get("missing", []),
}
defer.returnValue(
(200, send_content)
)
@log_function
def _get_persisted_pdu(self, origin, event_id, do_auth=True):
""" Get a PDU from the database with given origin and id.
@ -253,6 +310,9 @@ class FederationServer(object):
origin, pdu.event_id, do_auth=False
)
# FIXME: Currently we fetch an event again when we already have it
# if it has been marked as an outlier.
already_seen = (
existing and (
not existing.internal_metadata.is_outlier()
@ -264,14 +324,27 @@ class FederationServer(object):
defer.returnValue({})
return
# Check signature.
try:
pdu = yield self._check_sigs_and_hash(pdu)
except SynapseError as e:
raise FederationError(
"ERROR",
e.code,
e.msg,
affected=pdu.event_id,
)
state = None
auth_chain = []
have_seen = yield self.store.have_events(
[e for e, _ in pdu.prev_events]
[ev for ev, _ in pdu.prev_events]
)
fetch_state = False
# Get missing pdus if necessary.
if not pdu.internal_metadata.is_outlier():
# We only backfill backwards to the min depth.
@ -308,19 +381,29 @@ class FederationServer(object):
logger.debug("Processed pdu %s", event_id)
else:
logger.warn("Failed to get PDU %s", event_id)
fetch_state = True
except:
# TODO(erikj): Do some more intelligent retries.
logger.exception("Failed to get PDU")
fetch_state = True
else:
# We need to get the state at this event, since we have reached
# a backward extremity edge.
logger.debug(
"_handle_new_pdu getting state for %s",
pdu.room_id
)
state, auth_chain = yield self.get_state_for_room(
origin, pdu.room_id, pdu.event_id,
)
prevs = {e_id for e_id, _ in pdu.prev_events}
seen = set(have_seen.keys())
if prevs - seen:
fetch_state = True
else:
fetch_state = True
if fetch_state:
# We need to get the state at this event, since we haven't
# processed all the prev events.
logger.debug(
"_handle_new_pdu getting state for %s",
pdu.room_id
)
state, auth_chain = yield self.get_state_for_room(
origin, pdu.room_id, pdu.event_id,
)
ret = yield self.handler.on_receive_pdu(
origin,
@ -343,3 +426,37 @@ class FederationServer(object):
event.internal_metadata.outlier = outlier
return event
@defer.inlineCallbacks
def _check_sigs_and_hash(self, pdu):
"""Throws a SynapseError if the PDU does not have the correct
signatures.
Returns:
FrozenEvent: Either the given event or it redacted if it failed the
content hash check.
"""
# Check signatures are correct.
redacted_event = prune_event(pdu)
redacted_pdu_json = redacted_event.get_pdu_json()
try:
yield self.keyring.verify_json_for_server(
pdu.origin, redacted_pdu_json
)
except SynapseError:
logger.warn(
"Signature check failed for %s redacted to %s",
encode_canonical_json(pdu.get_pdu_json()),
encode_canonical_json(redacted_pdu_json),
)
raise
if not check_event_content_hash(pdu):
logger.warn(
"Event content has been tampered, redacting %s, %s",
pdu.event_id, encode_canonical_json(pdu.get_dict())
)
defer.returnValue(redacted_event)
defer.returnValue(pdu)

2
synapse/federation/replication.py
View File

@ -51,6 +51,8 @@ class ReplicationLayer(FederationClient, FederationServer):
def __init__(self, hs, transport_layer):
self.server_name = hs.hostname
self.keyring = hs.get_keyring()
self.transport_layer = transport_layer
self.transport_layer.register_received_handler(self)
self.transport_layer.register_request_handler(self)

16
synapse/federation/transport/client.py
View File

@ -213,3 +213,19 @@ class TransportLayerClient(object):
)
defer.returnValue(response)
@defer.inlineCallbacks
@log_function
def send_query_auth(self, destination, room_id, event_id, content):
path = PREFIX + "/query_auth/%s/%s" % (room_id, event_id)
code, content = yield self.client.post_json(
destination=destination,
path=path,
data=content,
)
if not 200 <= code < 300:
raise RuntimeError("Got %d from send_invite", code)
defer.returnValue(json.loads(content))

21
synapse/federation/transport/server.py
View File

@ -42,7 +42,7 @@ class TransportLayerServer(object):
content = None
origin = None
if request.method == "PUT":
if request.method in ["PUT", "POST"]:
# TODO: Handle other method types? other content types?
try:
content_bytes = request.content.read()
@ -234,6 +234,16 @@ class TransportLayerServer(object):
)
)
)
self.server.register_path(
"POST",
re.compile("^" + PREFIX + "/query_auth/([^/]*)/([^/]*)$"),
self._with_authentication(
lambda origin, content, query, context, event_id:
self._on_query_auth_request(
origin, content, event_id,
)
)
)
@defer.inlineCallbacks
@log_function
@ -325,3 +335,12 @@ class TransportLayerServer(object):
)
defer.returnValue((200, content))
@defer.inlineCallbacks
@log_function
def _on_query_auth_request(self, origin, content, event_id):
new_content = yield self.request_handler.on_query_auth_request(
origin, content, event_id
)
defer.returnValue((200, new_content))

429
synapse/handlers/federation.py
View File

@ -17,19 +17,16 @@
from ._base import BaseHandler
from synapse.events.utils import prune_event
from synapse.api.errors import (
AuthError, FederationError, SynapseError, StoreError,
AuthError, FederationError, StoreError,
)
from synapse.api.constants import EventTypes, Membership
from synapse.api.constants import EventTypes, Membership, RejectedReason
from synapse.util.logutils import log_function
from synapse.util.async import run_on_reactor
from synapse.crypto.event_signing import (
compute_event_signature, check_event_content_hash,
add_hashes_and_signatures,
compute_event_signature, add_hashes_and_signatures,
)
from synapse.types import UserID
from syutil.jsonutil import encode_canonical_json
from twisted.internet import defer
@ -113,33 +110,6 @@ class FederationHandler(BaseHandler):
logger.debug("Processing event: %s", event.event_id)
redacted_event = prune_event(event)
redacted_pdu_json = redacted_event.get_pdu_json()
try:
yield self.keyring.verify_json_for_server(
event.origin, redacted_pdu_json
)
except SynapseError as e:
logger.warn(
"Signature check failed for %s redacted to %s",
encode_canonical_json(pdu.get_pdu_json()),
encode_canonical_json(redacted_pdu_json),
)
raise FederationError(
"ERROR",
e.code,
e.msg,
affected=event.event_id,
)
if not check_event_content_hash(event):
logger.warn(
"Event content has been tampered, redacting %s, %s",
event.event_id, encode_canonical_json(event.get_dict())
)
event = redacted_event
logger.debug("Event: %s", event)
# FIXME (erikj): Awful hack to make the case where we are not currently
@ -149,41 +119,20 @@ class FederationHandler(BaseHandler):
event.room_id,
self.server_name
)
if not is_in_room and not event.internal_metadata.outlier:
if not is_in_room and not event.internal_metadata.is_outlier():
logger.debug("Got event for room we're not in.")
replication = self.replication_layer
if not state:
state, auth_chain = yield replication.get_state_for_room(
origin, context=event.room_id, event_id=event.event_id,
)
if not auth_chain:
auth_chain = yield replication.get_event_auth(
origin,
context=event.room_id,
event_id=event.event_id,
)
for e in auth_chain:
e.internal_metadata.outlier = True
try:
yield self._handle_new_event(e, fetch_auth_from=origin)
except:
logger.exception(
"Failed to handle auth event %s",
e.event_id,
)
current_state = state
if state:
if state and auth_chain is not None:
for e in state:
logging.info("A :) %r", e)
e.internal_metadata.outlier = True
try:
yield self._handle_new_event(e)
auth_ids = [e_id for e_id, _ in e.auth_events]
auth = {
(e.type, e.state_key): e for e in auth_chain
if e.event_id in auth_ids
}
yield self._handle_new_event(origin, e, auth_events=auth)
except:
logger.exception(
"Failed to handle state event %s",
@ -192,6 +141,7 @@ class FederationHandler(BaseHandler):
try:
yield self._handle_new_event(
origin,
event,
state=state,
backfilled=backfilled,
@ -394,7 +344,14 @@ class FederationHandler(BaseHandler):
for e in auth_chain:
e.internal_metadata.outlier = True
try:
yield self._handle_new_event(e)
auth_ids = [e_id for e_id, _ in e.auth_events]
auth = {
(e.type, e.state_key): e for e in auth_chain
if e.event_id in auth_ids
}
yield self._handle_new_event(
target_host, e, auth_events=auth
)
except:
logger.exception(
"Failed to handle auth event %s",
@ -405,8 +362,13 @@ class FederationHandler(BaseHandler):
# FIXME: Auth these.
e.internal_metadata.outlier = True
try:
auth_ids = [e_id for e_id, _ in e.auth_events]
auth = {
(e.type, e.state_key): e for e in auth_chain
if e.event_id in auth_ids
}
yield self._handle_new_event(
e, fetch_auth_from=target_host
target_host, e, auth_events=auth
)
except:
logger.exception(
@ -415,6 +377,7 @@ class FederationHandler(BaseHandler):
)
yield self._handle_new_event(
target_host,
new_event,
state=state,
current_state=state,
@ -481,7 +444,7 @@ class FederationHandler(BaseHandler):
event.internal_metadata.outlier = False
context = yield self._handle_new_event(event)
context = yield self._handle_new_event(origin, event)
logger.debug(
"on_send_join_request: After _handle_new_event: %s, sigs: %s",
@ -682,11 +645,12 @@ class FederationHandler(BaseHandler):
waiters.pop().callback(None)
@defer.inlineCallbacks
def _handle_new_event(self, event, state=None, backfilled=False,
current_state=None, fetch_auth_from=None):
@log_function
def _handle_new_event(self, origin, event, state=None, backfilled=False,
current_state=None, auth_events=None):
logger.debug(
"_handle_new_event: Before annotate: %s, sigs: %s",
"_handle_new_event: %s, sigs: %s",
event.event_id, event.signatures,
)
@ -694,65 +658,44 @@ class FederationHandler(BaseHandler):
event, old_state=state
)
if not auth_events:
auth_events = context.auth_events
logger.debug(
"_handle_new_event: Before auth fetch: %s, sigs: %s",
event.event_id, event.signatures,
"_handle_new_event: %s, auth_events: %s",
event.event_id, auth_events,
)
is_new_state = not event.internal_metadata.is_outlier()
known_ids = set(
[s.event_id for s in context.auth_events.values()]
)
for e_id, _ in event.auth_events:
if e_id not in known_ids:
e = yield self.store.get_event(e_id, allow_none=True)
if not e and fetch_auth_from is not None:
# Grab the auth_chain over federation if we are missing
# auth events.
auth_chain = yield self.replication_layer.get_event_auth(
fetch_auth_from, event.event_id, event.room_id
)
for auth_event in auth_chain:
yield self._handle_new_event(auth_event)
e = yield self.store.get_event(e_id, allow_none=True)
if not e:
# TODO: Do some conflict res to make sure that we're
# not the ones who are wrong.
logger.info(
"Rejecting %s as %s not in db or %s",
event.event_id, e_id, known_ids,
)
# FIXME: How does raising AuthError work with federation?
raise AuthError(403, "Cannot find auth event")
context.auth_events[(e.type, e.state_key)] = e
logger.debug(
"_handle_new_event: Before hack: %s, sigs: %s",
event.event_id, event.signatures,
)
# This is a hack to fix some old rooms where the initial join event
# didn't reference the create event in its auth events.
if event.type == EventTypes.Member and not event.auth_events:
if len(event.prev_events) == 1:
c = yield self.store.get_event(event.prev_events[0][0])
if c.type == EventTypes.Create:
context.auth_events[(c.type, c.state_key)] = c
auth_events[(c.type, c.state_key)] = c
logger.debug(
"_handle_new_event: Before auth check: %s, sigs: %s",
event.event_id, event.signatures,
)
try:
yield self.do_auth(
origin, event, context, auth_events=auth_events
)
except AuthError as e:
logger.warn(
"Rejecting %s because %s",
event.event_id, e.msg
)
self.auth.check(event, auth_events=context.auth_events)
context.rejected = RejectedReason.AUTH_ERROR
logger.debug(
"_handle_new_event: Before persist_event: %s, sigs: %s",
event.event_id, event.signatures,
)
yield self.store.persist_event(
event,
context=context,
backfilled=backfilled,
is_new_state=False,
current_state=current_state,
)
raise
yield self.store.persist_event(
event,
@ -762,9 +705,257 @@ class FederationHandler(BaseHandler):
current_state=current_state,
)
logger.debug(
"_handle_new_event: After persist_event: %s, sigs: %s",
event.event_id, event.signatures,
defer.returnValue(context)
@defer.inlineCallbacks
def on_query_auth(self, origin, event_id, remote_auth_chain, rejects,
missing):
# Just go through and process each event in `remote_auth_chain`. We
# don't want to fall into the trap of `missing` being wrong.
for e in remote_auth_chain:
try:
yield self._handle_new_event(origin, e)
except AuthError:
pass
# Now get the current auth_chain for the event.
local_auth_chain = yield self.store.get_auth_chain([event_id])
# TODO: Check if we would now reject event_id. If so we need to tell
# everyone.
ret = yield self.construct_auth_difference(
local_auth_chain, remote_auth_chain
)
defer.returnValue(context)
logger.debug("on_query_auth reutrning: %s", ret)
defer.returnValue(ret)
@defer.inlineCallbacks
@log_function
def do_auth(self, origin, event, context, auth_events):
# Check if we have all the auth events.
res = yield self.store.have_events(
[e_id for e_id, _ in event.auth_events]
)
event_auth_events = set(e_id for e_id, _ in event.auth_events)
seen_events = set(res.keys())
missing_auth = event_auth_events - seen_events
if missing_auth:
logger.debug("Missing auth: %s", missing_auth)
# If we don't have all the auth events, we need to get them.
remote_auth_chain = yield self.replication_layer.get_event_auth(
origin, event.room_id, event.event_id
)
for e in remote_auth_chain:
try:
auth_ids = [e_id for e_id, _ in e.auth_events]
auth = {
(e.type, e.state_key): e for e in remote_auth_chain
if e.event_id in auth_ids
}
e.internal_metadata.outlier = True
yield self._handle_new_event(
origin, e, auth_events=auth
)
auth_events[(e.type, e.state_key)] = e
except AuthError:
pass
# FIXME: Assumes we have and stored all the state for all the
# prev_events
current_state = set(e.event_id for e in auth_events.values())
different_auth = event_auth_events - current_state
if different_auth and not event.internal_metadata.is_outlier():
# Do auth conflict res.
logger.debug("Different auth: %s", different_auth)
# 1. Get what we think is the auth chain.
auth_ids = self.auth.compute_auth_events(event, context)
local_auth_chain = yield self.store.get_auth_chain(auth_ids)
# 2. Get remote difference.
result = yield self.replication_layer.query_auth(
origin,
event.room_id,
event.event_id,
local_auth_chain,
)
# 3. Process any remote auth chain events we haven't seen.
for missing_id in result.get("missing", []):
try:
for e in result["auth_chain"]:
if e.event_id == missing_id:
ev = e
break
auth_ids = [e_id for e_id, _ in ev.auth_events]
auth = {
(e.type, e.state_key): e for e in result["auth_chain"]
if e.event_id in auth_ids
}
ev.internal_metadata.outlier = True
yield self._handle_new_event(
origin, ev, auth_events=auth
)
if ev.event_id in event_auth_events:
auth_events[(ev.type, ev.state_key)] = ev
except AuthError:
pass
# 4. Look at rejects and their proofs.
# TODO.
context.current_state.update(auth_events)
context.state_group = None
try:
self.auth.check(event, auth_events=auth_events)
except AuthError:
raise
@defer.inlineCallbacks
def construct_auth_difference(self, local_auth, remote_auth):
""" Given a local and remote auth chain, find the differences. This
assumes that we have already processed all events in remote_auth
Params:
local_auth (list)
remote_auth (list)
Returns:
dict
"""
logger.debug("construct_auth_difference Start!")
# TODO: Make sure we are OK with local_auth or remote_auth having more
# auth events in them than strictly necessary.
def sort_fun(ev):
return ev.depth, ev.event_id
logger.debug("construct_auth_difference after sort_fun!")
# We find the differences by starting at the "bottom" of each list
# and iterating up on both lists. The lists are ordered by depth and
# then event_id, we iterate up both lists until we find the event ids
# don't match. Then we look at depth/event_id to see which side is
# missing that event, and iterate only up that list. Repeat.
remote_list = list(remote_auth)
remote_list.sort(key=sort_fun)
local_list = list(local_auth)
local_list.sort(key=sort_fun)
local_iter = iter(local_list)
remote_iter = iter(remote_list)
logger.debug("construct_auth_difference before get_next!")
def get_next(it, opt=None):
try:
return it.next()
except:
return opt
current_local = get_next(local_iter)
current_remote = get_next(remote_iter)
logger.debug("construct_auth_difference before while")
missing_remotes = []
missing_locals = []
while current_local or current_remote:
if current_remote is None:
missing_locals.append(current_local)
current_local = get_next(local_iter)
continue
if current_local is None:
missing_remotes.append(current_remote)
current_remote = get_next(remote_iter)
continue
if current_local.event_id == current_remote.event_id:
current_local = get_next(local_iter)
current_remote = get_next(remote_iter)
continue
if current_local.depth < current_remote.depth:
missing_locals.append(current_local)
current_local = get_next(local_iter)
continue
if current_local.depth > current_remote.depth:
missing_remotes.append(current_remote)
current_remote = get_next(remote_iter)
continue
# They have the same depth, so we fall back to the event_id order
if current_local.event_id < current_remote.event_id:
missing_locals.append(current_local)
current_local = get_next(local_iter)
if current_local.event_id > current_remote.event_id:
missing_remotes.append(current_remote)
current_remote = get_next(remote_iter)
continue
logger.debug("construct_auth_difference after while")
# missing locals should be sent to the server
# We should find why we are missing remotes, as they will have been
# rejected.
# Remove events from missing_remotes if they are referencing a missing
# remote. We only care about the "root" rejected ones.
missing_remote_ids = [e.event_id for e in missing_remotes]
base_remote_rejected = list(missing_remotes)
for e in missing_remotes:
for e_id, _ in e.auth_events:
if e_id in missing_remote_ids:
base_remote_rejected.remove(e)
reason_map = {}
for e in base_remote_rejected:
reason = yield self.store.get_rejection_reason(e.event_id)
if reason is None:
# FIXME: ERRR?!
logger.warn("Could not find reason for %s", e.event_id)
raise RuntimeError("")
reason_map[e.event_id] = reason
if reason == RejectedReason.AUTH_ERROR:
pass
elif reason == RejectedReason.REPLACED:
# TODO: Get proof
pass
elif reason == RejectedReason.NOT_ANCESTOR:
# TODO: Get proof.
pass
logger.debug("construct_auth_difference returning")
defer.returnValue({
"auth_chain": local_auth,
"rejects": {
e.event_id: {
"reason": reason_map[e.event_id],
"proof": None,
}
for e in base_remote_rejected
},
"missing": [e.event_id for e in missing_locals],
})

37
synapse/http/matrixfederationclient.py
View File

@ -244,6 +244,43 @@ class MatrixFederationHttpClient(object):
defer.returnValue((response.code, body))
@defer.inlineCallbacks
def post_json(self, destination, path, data={}):
""" Sends the specifed json data using POST
Args:
destination (str): The remote server to send the HTTP request
to.
path (str): The HTTP path.
data (dict): A dict containing the data that will be used as
the request body. This will be encoded as JSON.
Returns:
Deferred: Succeeds when we get a 2xx HTTP response. The result
will be the decoded JSON body. On a 4xx or 5xx error response a
CodeMessageException is raised.
"""
def body_callback(method, url_bytes, headers_dict):
self.sign_request(
destination, method, url_bytes, headers_dict, data
)
return _JsonProducer(data)
response = yield self._create_request(
destination.encode("ascii"),
"POST",
path.encode("ascii"),
body_callback=body_callback,
headers_dict={"Content-Type": ["application/json"]},
)
logger.debug("Getting resp body")
body = yield readBody(response)
logger.debug("Got resp body")
defer.returnValue((response.code, body))
@defer.inlineCallbacks
def get_json(self, destination, path, args={}, retry_on_dns_fail=True):
""" GETs some json from the given host homeserver and path

7
synapse/state.py
View File

@ -168,10 +168,17 @@ class StateHandler(object):
first is the name of a state group if one and only one is involved,
otherwise `None`.
"""
logger.debug("resolve_state_groups event_ids %s", event_ids)
state_groups = yield self.store.get_state_groups(
event_ids
)
logger.debug(
"resolve_state_groups state_groups %s",
state_groups.keys()
)
group_names = set(state_groups.keys())
if len(group_names) == 1:
name, state_list = state_groups.items().pop()

12
synapse/storage/rejections.py
View File

@ -28,6 +28,16 @@ class RejectionsStore(SQLBaseStore):
values={
"event_id": event_id,
"reason": reason,
"last_failure": self._clock.time_msec(),
"last_check": self._clock.time_msec(),
}
)
def get_rejection_reason(self, event_id):
return self._simple_select_one_onecol(
table="rejections",
retcol="reason",
keyvalues={
"event_id": event_id,
},
allow_none=True,
)

2
tests/handlers/test_federation.py
View File

@ -52,6 +52,7 @@ class FederationTestCase(unittest.TestCase):
"get_room",
"get_destination_retry_timings",
"set_destination_retry_timings",
"have_events",
]),
resource_for_federation=NonCallableMock(),
http_client=NonCallableMock(spec_set=[]),
@ -90,6 +91,7 @@ class FederationTestCase(unittest.TestCase):
self.datastore.persist_event.return_value = defer.succeed(None)
self.datastore.get_room.return_value = defer.succeed(True)
self.auth.check_host_in_room.return_value = defer.succeed(True)
self.datastore.have_events.return_value = defer.succeed({})
def annotate(ev, old_state=None):
context = Mock()