SPAKE2+ support

[est31]

I see SPAKE2+ mentioned in the cargo docs of the SPAKE crate. But it's not implemented yet, is it? It would be cool to have it.

[warner]

Nope, not yet.. sounds like a good idea to me too. We'll need to extend the API to provide a registration step, since the symmetric PAKEs don't have one.

[MihaelBercic]

Any updates on this?

[tarcieri]

Nope, the spake2 crate is largely in maintenance mode, but contributions would be welcome

[potto216]

If PRs are still being accepted on this issue I would like to contribute since it is useful for Matter home automation implementations. Also, if PRs are being accepted, I noticed several PRs such as #153 and #153 have been reviewed but haven't been merged. Is there a general sticking point that I should be aware of when doing the PR? Thanks

[tarcieri]

@potto216 it would be great if you can take a look. This repo unfortunately doesn't get the attention some others get, most notably because none of the current maintainers are experts in PAKE algorithms including SPAKE2.

Regarding the other PRs, they were all abandoned by their authors with open review questions.

This list of questions is still relevant.