yhsm-validation-server 1.2.0-1 (s390x binary) in ubuntu bionic

 This package validates YubiKey OTP's, OATH codes or password hashes
 using YubiHSM.
 .
 The interface is a REST API with a simple web server listening on
 localhost only (per default). It can function as a drop-in replacement
 for the traditional PHP based Yubico validation server, except that
 it does not provide the advanced replication features of that server.