Synapse allows empty localpart in a room ID over federation

[jplatte]

Description

!:sorunome.de is an existing room (made as an experiment using a patched Synapse). MSC 1597 specifies

The opaque_id part must not be empty, and must consist entirely of the characters [0-9a-zA-Z.=_-].

Version information

• Homeserver: matrix.org

[richvdh]

I daresay it allows all sorts of malformed room IDs, and indeed events as a whole.

related: https://github.com/matrix-org/matrix-doc/issues/1646.

[richvdh]

actually, on closer inspection, this isn't yet in the spec. MSC1597 is not (yet) implemented, and probably never will be.

[jplatte]

and probably never will be

What? What significance does a merged MSC have, then??

[richvdh]

@jplatte I refer you to the answer given last time you asked that question: matrix-org/matrix-spec-proposals#1598 (comment).

[jplatte]

I don't get it, so stuff should land in the spec first and then in Synapse? What about all the things Synapse does first that later land in the spec?

[richvdh]

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