[Gpg4win-devel] Putty and ECDSA support for gpg-agent in 2.0

[Dr. Peter Voigt]

Am Fri, 05 Jul 2013 14:04:41 +0200
schrieb Werner Koch <wk at gnupg.org>:

> On Fri,  5 Jul 2013 11:24, pvoigt at uos.de said:
> 
> > When now thing about a useful default I'd like the
> > --enable-putty-support being added automatically.
> 
> In the GPA and Kleopatra Backend-Preference you will find a check box
> below the gpg-agent tab.  Thus no need to mess around with an editor.
>
Well, I suppose Kleopatra will just add this option to gpg-agent.conf. I
just proposed this option be added automatically to gpg-agent.conf
during installation with the effect that you have a working password
caching mechanism right after installation of Gpg4win as Pageant is not
working anymore. Did I get it somehow wrong?

> > One possibly stupid question: How to tell PuTTY to read passphrases
> > from gpg-agent instead of Pageant? I'm using PuTTY 0.62.
> 
> Just don't start Pageant.  Putty looks for a tool which provides the
> Pageant protocol and gpg-agent does just this.  Technically Putty
> looks for a window named Pageant and communicates with the owner of
> that window using WM_COPYDATA and a mapped file.
> 
> I have not done extensive tests but the protocol used by Putty is
> identical to the one used by OpenSSH and thus gpg-agent should have no
> problem to reply to all requests (except for v1 keys - but nobody uses
> them anymore, right?).
> 
OK, if PuTTY is working as ssh client under Unix, there should be not
problem. To be honest: I'v no clue what you mean with v1 keys.

> 
> Shalom-Salam,
> 
>    Werner
> 
Regards,
Peter