Obtaining SSH Key format from OpenPGP public certificate without gpgkey2ssh

[NIIBE Yutaka]

On 01/07/2016 06:38 PM, Andre Heinecke wrote:
> E.g. Another person has verified / signed my PGP key that has an Authentication 
> Subkey. How can this Person get the SSH Key representation without having to 
> ask me to provide it? (Assuming the person has my public key and without 
> gpgkey2ssh)
> 
> I think this use case is one of the nice features you get by associating an 
> OpenPGP key with SSH Authentication and I would miss it if gpgkey2ssh is 
> removed.

Exactly, this is very useful.  In the past, I wrote an article:

   http://www.gniibe.org/memo/software/ssh/using-gpgkey-for-ssh.html

Alternatively, we have openpgp2ssh utility in monkeysphere.

   http://web.monkeysphere.info/

I think that it's worth to keep gpgkey2ssh in GnuPG and to enhance it
to support ECC.
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