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fix double-deserialization in federation transaction handler.

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Signed-off-by: Jason Volk <jason@zemos.net>
This commit is contained in:
Jason Volk 2024-04-12 12:52:20 -07:00 committed by June
parent 97fc6c158f
commit c4ebc2f1d1
1 changed files with 22 additions and 38 deletions
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60
src/api/server_server.rs
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@ -213,7 +213,9 @@ pub fn parse_incoming_pdu(pdu: &RawJsonValue) -> Result<(OwnedEventId, Canonical
.and_then(|id| RoomId::parse(id.as_str()?).ok())
.ok_or(Error::BadRequest(ErrorKind::InvalidParam, "Invalid room id in pdu"))?;
let room_version_id = services().rooms.state.get_room_version(&room_id)?;
let Ok(room_version_id) = services().rooms.state.get_room_version(&room_id) else {
return Err(Error::Error(format!("Server is not in room {room_id}")));
};
let Ok((event_id, value)) = gen_event_id_canonical_json(pdu, &room_version_id) else {
// Event could not be converted to canonical json
@ -222,6 +224,7 @@ pub fn parse_incoming_pdu(pdu: &RawJsonValue) -> Result<(OwnedEventId, Canonical
"Could not convert event to canonical json.",
));
};
Ok((event_id, value, room_id))
}
@ -236,10 +239,6 @@ pub async fn send_transaction_message_route(
.as_ref()
.expect("server is authenticated");
let mut resolved_map = BTreeMap::new();
let pub_key_map = RwLock::new(BTreeMap::new());
// This is all the auth_events that have been recursively fetched so they don't
// have to be deserialized over and over again.
// TODO: make this persist across requests but not in a DB Tree (in globals?)
@ -248,47 +247,35 @@ pub async fn send_transaction_message_route(
// maybe) all of the auth events that it references.
// let mut auth_cache = EventMap::new();
let mut parsed_pdus = vec![];
let mut parsed_pdus = Vec::with_capacity(body.pdus.len());
for pdu in &body.pdus {
let value: CanonicalJsonObject = serde_json::from_str(pdu.get()).map_err(|e| {
warn!("Error parsing incoming event {:?}: {:?}", pdu, e);
Error::BadServerResponse("Invalid PDU in server response")
})?;
let room_id: OwnedRoomId = value
.get("room_id")
.and_then(|id| RoomId::parse(id.as_str()?).ok())
.ok_or(Error::BadRequest(ErrorKind::InvalidParam, "Invalid room id in pdu"))?;
if services().rooms.state.get_room_version(&room_id).is_err() {
debug!("Server is not in room {room_id}");
continue;
}
let r = parse_incoming_pdu(pdu);
let (event_id, value, room_id) = match r {
parsed_pdus.push(match parse_incoming_pdu(pdu) {
Ok(t) => t,
Err(e) => {
warn!("Could not parse PDU: {e}");
info!("Full PDU: {:?}", &pdu);
continue;
},
};
parsed_pdus.push((event_id, value, room_id));
});
// We do not add the event_id field to the pdu here because of signature
// and hashes checks
}
// We go through all the signatures we see on the PDUs and fetch the
// corresponding signing keys
services()
.rooms
.event_handler
.fetch_required_signing_keys(parsed_pdus.iter().map(|(_event_id, event, _room_id)| event), &pub_key_map)
.await
.unwrap_or_else(|e| {
warn!("Could not fetch all signatures for PDUs from {}: {:?}", sender_servername, e);
});
let pub_key_map = RwLock::new(BTreeMap::new());
if !parsed_pdus.is_empty() {
services()
.rooms
.event_handler
.fetch_required_signing_keys(parsed_pdus.iter().map(|(_event_id, event, _room_id)| event), &pub_key_map)
.await
.unwrap_or_else(|e| {
warn!("Could not fetch all signatures for PDUs from {}: {:?}", sender_servername, e);
});
}
let mut resolved_map = BTreeMap::new();
for (event_id, value, room_id) in parsed_pdus {
let mutex = Arc::clone(
services()
@ -312,12 +299,9 @@ pub async fn send_transaction_message_route(
);
drop(mutex_lock);
let elapsed = start_time.elapsed();
debug!(
"Handling transaction of event {} took {}m{}s",
event_id,
elapsed.as_secs() / 60,
elapsed.as_secs() % 60
elapsed = ?start_time.elapsed(),
"Handled PDU {event_id}"
);
}