The fileset
openssl.1.1.1.* are part of AIX base (so available via fix central), or, with a (no-charge) IBMid via the Web Service Packs.
Maybe this link works (taking you to a login page first):
https://www.ibm.com/resources/mrs/assets/DownloadList?source=aixbp&lang=en_USAlso, on
http://www.rootvg.net in the top-right there is a link to
AIX Web Packs. Sadly, IBM changes their policy regarding this page - so the links might not work.
As a last resort, try to google: AIX Web Pack OpenSSL or OpenSSH.
Hope this helps.
Michael
p.s. I did not put the requirement in their for fun. Python obsoleted using any OpenSSL less than this version (for building, so also for running).