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authorErik Johnston <erik@matrix.org>2016-08-02 09:56:31 +0100
committerErik Johnston <erik@matrix.org>2016-08-02 09:56:31 +0100
commit733bf442901b256a7dc6a206b912f80a127b1eb3 (patch)
tree1ef6aab444cc4343db257dc373ddf5d918a98371 /synapse/handlers/register.py
parentMake jenkins dendron test federation read apis (diff)
parentMerge pull request #970 from matrix-org/erikj/clock (diff)
downloadsynapse-733bf442901b256a7dc6a206b912f80a127b1eb3.tar.xz
Merge branch 'develop' of github.com:matrix-org/synapse into erikj/fed_reader
Diffstat (limited to 'synapse/handlers/register.py')
-rw-r--r--synapse/handlers/register.py7
1 files changed, 7 insertions, 0 deletions
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()