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Check if the localpart is reserved for guests earlier in the registration flow #7625

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Jun 3, 2020
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Check if the localpart is reserved for guests earlier in the registration flow #7625

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4ffb5c6
Check if the localpart is reserved for guests earlier in the registra…
babolivier Jun 3, 2020
5922eb0
Update synapse/handlers/register.py
babolivier Jun 3, 2020
69dc752
Update changelog.d/7625.misc
babolivier Jun 3, 2020
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1 change: 1 addition & 0 deletions changelog.d/7625.misc
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Check if the localpart of a Matrix ID is reserved for guest users earlier in the registration flow, as well as when responding to requests to `/register/available`.
18 changes: 9 additions & 9 deletions synapse/handlers/register.py
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Original file line number Diff line number Diff line change
Expand Up @@ -128,6 +128,15 @@ def check_username(self, localpart, guest_access_token=None, assigned_user_id=No
errcode=Codes.FORBIDDEN,
)

if guest_access_token is None:
try:
int(localpart)
raise SynapseError(
400, "Numeric user IDs are reserved for guest users."
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Could be nice to send errcode M_INVALID_USERNAME, for the moment, the client receives M_UNKNOWN:

{"errcode":"M_UNKNOWN","error":"Numeric user IDs are reserved for guest users."}

)
except ValueError:
pass

@defer.inlineCallbacks
def register_user(
self,
Expand Down Expand Up @@ -170,15 +179,6 @@ def register_user(

was_guest = guest_access_token is not None

if not was_guest:
try:
int(localpart)
raise SynapseError(
400, "Numeric user IDs are reserved for guest users."
)
except ValueError:
pass

user = UserID(localpart, self.hs.hostname)
user_id = user.to_string()

Expand Down