Prof. Ernesto Hernández-Novich (emhn-guest) offered help in private
communication, and donated a patch in private communication.  (Thanks!) His
patch, which builds a current upstream, should get applied.

Attached you'll find the patch mentioned.

This patch provides updated `quilt` patches so upstream `validns`

commit f423245b9867359398f83e8a60fea167ad7694ca
Author: Anton Berezin <tobez@tobez.org>
Date:   Fri Aug 4 16:27:44 2017 +0200

builds against OpenSSL 1.1. I've been using this patch for over a
month with a Debian 9 targeted package, and no issues.

I wrote upstream asking whether or not they would update their code to
work with OpenSSL 1.1 but haven't gotten an answer.

Regards,

Any progress on this?

I see the patch didn't make it into Debian 11.

I've been using the patch for custom-built packages targeting Debian 10
and Debian 11, the latter with a simple `compat 10` change. There
haven't been any changes to upstream since I provided the patch.

We believe that the bug you reported is fixed in the latest version of
validns, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 935013@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Andreas Tille <tille@debian.org> (supplier of updated validns package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Thu, 26 Dec 2024 15:25:07 +0100
Source: validns
Architecture: source
Version: 0.8+git20230810.a7e6b4f-1
Distribution: unstable
Urgency: medium
Maintainer: Casper Gielen <casper-alioth@gielen.name>
Changed-By: Andreas Tille <tille@debian.org>
Closes: 935011 935012 935013
Changes:
 validns (0.8+git20230810.a7e6b4f-1) unstable; urgency=medium
 .
   * Team upload
 .
   [ Jelmer Vernooij ]
   * Migrate repository from alioth to salsa.
     Closes: #935011
 .
   [ Andreas Tille ]
   * Latest upstream commit
     Closes: #935012, #935013
   * Point watch file to Github
   * d/rules: Its no example
   * Homepage is now Github
   * Standards-Version: 4.7.0 (routine-update)
   * debhelper-compat 13 (routine-update)
   * Secure URI in copyright format (routine-update)
   * Remove trailing whitespace in debian/changelog (routine-update)
   * Remove trailing whitespace in debian/copyright (routine-update)
   * Remove trailing whitespace in debian/rules (routine-update)
   * Rules-Requires-Root: no (routine-update)
   * Trim trailing whitespace.
   * Fix day-of-week for changelog entry 0.6-1.
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