From 05f6447301ddc72cec7564f9d39f3e16aaa728c6 Mon Sep 17 00:00:00 2001 From: "Paul \"LeoNerd\" Evans" Date: Wed, 27 Jul 2016 17:54:26 +0100 Subject: [PATCH] Forbid non-ASes from registering users whose names begin with '_' (SYN-738) --- synapse/handlers/register.py | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/synapse/handlers/register.py b/synapse/handlers/register.py index b9b5880d64..dd75c4fecf 100644 --- a/synapse/handlers/register.py +++ b/synapse/handlers/register.py @@ -53,6 +53,13 @@ class RegistrationHandler(BaseHandler): Codes.INVALID_USERNAME ) + if localpart[0] == '_': + raise SynapseError( + 400, + "User ID may not begin with _", + Codes.INVALID_USERNAME + ) + user = UserID(localpart, self.hs.hostname) user_id = user.to_string()