gpg4win: gpg agent forwarding from a Windows Workstation with a yubikey to a Linux machine

[Thomas Glanzmann]

Hello,
I would like to use gpg-agent on Windows with a yubikey and use ssh
to forward my gpg agent to a remote machine. Is that already possible,
if so how? I assume I can't use putty. So probably I have to use cygwin
openssh, but what about the unix socket on windows? Can a named pipe
be used?

SSH Agent Forwarding with putty and gpg4win already works perfectly.

Under Linux I use the following:

(workstation) [~] grep extra .gnupg/gpg-agent.conf
extra-socket /home/sithglan/.gnupg/S.gpg-agent-extra
(workstation) [~] ssh -R /home/sithglan/.gnupg/S.gpg-agent:/home/sithglan/.gnupg/S.gpg-agent-extra remote

Cheers,
        Thomas