Why are 64-bit libraries not included in GnuPG but Gpg4win?

Bernhard Reiter bernhard at intevation.de
Thu Dec 2 10:06:11 CET 2021

Am Mittwoch 01 Dezember 2021 01:19:45 schrieb Sven Richter via Gnupg-users:
> As the title states, why are there no 64-bit libraries in GnuPG for
> Windows? (The installer from the binary releases)

I don't know (but I respond with hints and repeat the question as HTML emails 
are filtered out by some participants.)

> It's not like they don't 
> exist at all but they are part of Gpg4win only. Shouldn't they be included
> directly in the core part? Why are they "moved out" to Gpg4win? It seems
> weird to me that I would have to install gpg4win just to get hold of some
> 64-bit libraries for GnuPG.

Gpg4win is an official GnuPG distribution for Windows
and it is possible to customise the installation to mainly install GnuPG.
Overal I believe this maybe an oversight, maybe you should file an issue with

> The fact that I'm already using Thunderbird 64-bit. As many will know,
> Enigmail isn't much of a thing anymore. But I don't really trust that new
> OpenPGP.js implementation they have now,

As far as I know Thunderbird 78+ uses RNP/Botan, and not OpenPGP.js.

> I rather use my existing setup. No 
> problem, there is a setting just for this in Thunderbird after all, simply
> set mail.openpgp.allow_external_gnupg = true. Except that this got me vague
> error messages.I'll spare everybody any long explanations but as hinted the
> issue seemingly was my 64-bit client. After hours of work I ended up having
> to install Gpg4win, copy the 64-bit libraries over and deinstall it again.

Thanks for reporting that this worked fine for you after the right setup!

> Luckily the libraries work despite Gpg4win 3.1.16 containing only GnuPG
> 2.2.28, while I'm already using GnuPG 2.3.3, still seems questionable
> though.This brought me to the question above: Why are the 64-bit libraries
> only in Gpg4win? Why does GnuPG not come with 64-bit libraries in the first
> place? I can't imagine that I'm the only or first one using GnuPG and
> wanting it to work with 64-bit software.

Most people use Gpg4win, only recently we had to recommed to install
the crypto engine installers over it. So thanks for reporting the issue!

Best Regards,

www.intevation.de/~bernhard   +49 541 33 508 3-3
Intevation GmbH, Osnabrück, DE; Amtsgericht Osnabrück, HRB 18998
Geschäftsführer Frank Koormann, Bernhard Reiter, Dr. Jan-Oliver Wagner
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