[Bug 3748] "webauthn-sk-ecdsa-sha2-nistp256 at openssh.com" signature type not supported from ssh agent

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3748

--- Comment #2 from bmhomer13 at gmail.com ---
Thanks for confirming the status of webauthn support, this is what I
suspected.

I tried to disable the check you mentioned, this does resolve the error
on the client-side. However, I then run into the following on the
server-side: "debug3: mm_answer_keyverify: publickey ECDSA-SK-CERT
signature unverified: incomplete message"

I checked that my agent code produces a signature which is the same as
https://github.com/openssh/openssh-portable/blob/master/regress/unittests/sshsig/webauthn.html
given the same inputs, so not sure what happened here yet.

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