XEP-0440: SASL Channel-Binding Type Capability support

[Neustradamus]

Dear @maranda,

After jabber.ru MITM, can you add the support of "XEP-0440: SASL Channel-Binding Type Capability" in Metronome IM for more security?

• https://xmpp.org/extensions/xep-0440.html

Thanks in advance.

Linked to:

• RFC 9266: Channel Bindings for TLS 1.3 support #539
• XEP-0388: Extensible SASL Profile support #545
• XEP-0440: SASL Channel-Binding Type Capability support #546
• XEP-0474: SASL SCRAM Downgrade Protection support #551
• https://github.com/maranda/metronome/issues/554
• https://notes.valdikss.org.ru/jabber.ru-mitm/
• https://snikket.org/blog/on-the-jabber-ru-mitm/
• https://www.devever.net/~hl/xmpp-incident
• https://blog.jmp.chat/b/certwatch

[tmolitor-stud-tu]

Don't forget XEP-0474 (https://xmpp.org/extensions/xep-0474.html)
I can provide a patch for the upcoming version 0.3 of this XEP I made for prosody, if you want.