On Fri, Feb 8, 2019 at 9:23 AM, Marcel Waldvogel <[email protected]> wrote:
I just became aware that XEP-0412/RFC 6120 mandate SCRAM-SHA-1-PLUS. The way I understand it, the required TLS Channel Binding for the SASL -PLUS schemes is not possible from browser-based clients, as there is no way to get at the required low-level TLS information.

Yes, the -PLUS extension is just an abstraction leakage, and current use cases (browsers, load-balancers, etc) clearly reveal it. I myself don't like the tendency how TLS is leaking into upper application layers more and more (SNI, ALPN and now various IDs).

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