[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

Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
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                 CC|                            |djm at mindrot.org

--- Comment #1 from Damien Miller <djm at mindrot.org> ---
Unfortunately the status of webauthn signatures is largely untested.
The basic support is there for signature verification, but nothing in
OpenSSH generates webauthn signatures so some of the other plumbing
might be missing.

It might be this check that is causing your error:
https://github.com/openssh/openssh-portable/blob/88b35cbdc1500efece65cd6a9a20a72cf7e46eaa/authfd.c#L440-L442
 - does removing it help?

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