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Merge branch 'validate-state-of-admins-room' into 'next'

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Validate PDU in admins room

See merge request famedly/conduit!382
This commit is contained in:
Timo Kösters 2023-01-24 13:46:49 +00:00
parent 1e77373332 e923f63c49
commit f95dd4521c
1 changed files with 87 additions and 0 deletions
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87
src/service/rooms/timeline/mod.rs
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@ -22,6 +22,7 @@ use ruma::{
},
push::{Action, Ruleset, Tweak},
state_res,
state_res::Event,
state_res::RoomVersion,
uint, CanonicalJsonObject, CanonicalJsonValue, EventId, OwnedEventId, OwnedRoomId,
OwnedServerName, RoomAliasId, RoomId, UserId,
@ -683,6 +684,92 @@ impl Service {
let (pdu, pdu_json) =
self.create_hash_and_sign_event(pdu_builder, sender, room_id, state_lock)?;
let admin_room = services().rooms.alias.resolve_local_alias(
<&RoomAliasId>::try_from(
format!("#admins:{}", services().globals.server_name()).as_str(),
)
.expect("#admins:server_name is a valid room alias"),
)?;
if admin_room.filter(|v| v == room_id).is_some() {
match pdu.event_type() {
RoomEventType::RoomEncryption => {
warn!("Encryption is not allowed in the admins room");
return Err(Error::BadRequest(
ErrorKind::Forbidden,
"Encryption is not allowed in the admins room.",
));
}
RoomEventType::RoomMember => {
#[derive(Deserialize)]
struct ExtractMembership {
membership: MembershipState,
}
let target = pdu
.state_key()
.filter(|v| v.starts_with("@"))
.unwrap_or(sender.as_str());
let server_name = services().globals.server_name();
let server_user = format!("@conduit:{}", server_name);
let content = serde_json::from_str::<ExtractMembership>(pdu.content.get())
.map_err(|_| Error::bad_database("Invalid content in pdu."))?;
if content.membership == MembershipState::Leave {
if target == &server_user {
warn!("Conduit user cannot leave from admins room");
return Err(Error::BadRequest(
ErrorKind::Forbidden,
"Conduit user cannot leave from admins room.",
));
}
let count = services()
.rooms
.state_cache
.room_members(room_id)
.filter_map(|m| m.ok())
.filter(|m| m.server_name() == server_name)
.filter(|m| m != target)
.count();
if count < 2 {
warn!("Last admin cannot leave from admins room");
return Err(Error::BadRequest(
ErrorKind::Forbidden,
"Last admin cannot leave from admins room.",
));
}
}
if content.membership == MembershipState::Ban && pdu.state_key().is_some() {
if target == &server_user {
warn!("Conduit user cannot be banned in admins room");
return Err(Error::BadRequest(
ErrorKind::Forbidden,
"Conduit user cannot be banned in admins room.",
));
}
let count = services()
.rooms
.state_cache
.room_members(room_id)
.filter_map(|m| m.ok())
.filter(|m| m.server_name() == server_name)
.filter(|m| m != target)
.count();
if count < 2 {
warn!("Last admin cannot be banned in admins room");
return Err(Error::BadRequest(
ErrorKind::Forbidden,
"Last admin cannot be banned in admins room.",
));
}
}
}
_ => {}
}
}
// We append to state before appending the pdu, so we don't have a moment in time with the
// pdu without it's state. This is okay because append_pdu can't fail.
let statehashid = services().rooms.state.append_to_state(&pdu)?;