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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/room.py
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@ -52,6 +52,7 @@ from synapse.api.errors import (
)
from synapse.api.filtering import Filter
from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, RoomVersion
from synapse.event_auth import validate_event_for_room_version
from synapse.events import EventBase
from synapse.events.utils import copy_power_levels_contents
from synapse.rest.admin._base import assert_user_is_admin
@ -238,8 +239,9 @@ class RoomCreationHandler(BaseHandler):
},
)
old_room_version = await self.store.get_room_version(old_room_id)
await self._event_auth_handler.check_from_context(
old_room_version.identifier, tombstone_event, tombstone_context
validate_event_for_room_version(old_room_version, tombstone_event)
await self._event_auth_handler.check_auth_rules_from_context(
old_room_version, tombstone_event, tombstone_context
)
await self.clone_existing_room(