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Split event_auth.check into two parts (#10940)

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Broadly, the existing `event_auth.check` function has two parts:
 * a validation section: checks that the event isn't too big, that it has the rught signatures, etc. 
   This bit is independent of the rest of the state in the room, and so need only be done once 
   for each event.
 * an auth section: ensures that the event is allowed, given the rest of the state in the room.
   This gets done multiple times, against various sets of room state, because it forms part of
   the state res algorithm.

Currently, this is implemented with `do_sig_check` and `do_size_check` parameters, but I think
that makes everything hard to follow. Instead, we split the function in two and call each part
separately where it is needed.
This commit is contained in:
Richard van der Hoff 2021-09-29 18:59:15 +01:00 • committed by GitHub
parent a19aa8b162
commit 428174f902
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10 changed files with 177 additions and 172 deletions
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6
synapse/handlers/message.py
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@ -44,6 +44,7 @@ from synapse.api.errors import (
)
from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, RoomVersions
from synapse.api.urls import ConsentURIBuilder
from synapse.event_auth import validate_event_for_room_version
from synapse.events import EventBase
from synapse.events.builder import EventBuilder
from synapse.events.snapshot import EventContext
@ -1098,8 +1099,9 @@ class EventCreationHandler:
assert event.content["membership"] == Membership.LEAVE
else:
try:
await self._event_auth_handler.check_from_context(
room_version_obj.identifier, event, context
validate_event_for_room_version(room_version_obj, event)
await self._event_auth_handler.check_auth_rules_from_context(
room_version_obj, event, context
)
except AuthError as err:
logger.warning("Denying new event %r because %s", event, err)