Description of problem:

A fresh Satellite 6.16 installation on RHEL9 with FIPS enabled failed with:

~~~
2024-04-11 02:17:42 [ERROR ] [configure] Apr 11 02:17:41 sat616-rhel9.xxx.xxx.xx.xx.com systemd[1]: Starting Foreman Proxy...
2024-04-11 02:17:42 [ERROR ] [configure] Apr 11 02:17:42 sat616-rhel9.xxx.xx.xx.xx.xx smart-proxy[27075]: Errors detected on startup, see log for details. Exiting: Could not parse PKey
2024-04-11 02:17:42 [ERROR ] [configure] Apr 11 02:17:42 sat616-rhel9.x.x.x.x.x systemd[1]: foreman-proxy.service: Main process exited, code=exited, status=1/FAILURE
2024-04-11 02:17:42 [ERROR ] [configure] Apr 11 02:17:42 sat616-rhel9.x.x.x.x.x systemd[1]: foreman-proxy.service: Failed with result 'exit-code'.
2024-04-11 02:17:42 [ERROR ] [configure] Apr 11 02:17:42 sat616-rhel9.x.x.x.x.com systemd[1]: Failed to start Foreman Proxy.
~~~

Checking the foreman-proxy log, it has:

~~~
2024-04-11T02:17:42 [E] Unable to load private SSL key. Are the values correct in settings.yml and do permissions allow reading?
2024-04-11T02:17:42 [W] Error details for Unable to load private SSL key. Are the values correct in settings.yml and do permissions allow reading?: <OpenSSL::PKey::PKeyError>: Could not parse PKey
/usr/share/foreman-proxy/lib/launcher.rb:106:in `read'
/usr/share/foreman-proxy/lib/launcher.rb:106:in `load_ssl_private_key'
/usr/share/foreman-proxy/lib/launcher.rb:96:in `https_app'
/usr/share/foreman-proxy/lib/launcher.rb:132:in `launch'
/usr/share/foreman-proxy/bin/smart-proxy:6:in `<main>'
2024-04-11T02:17:42 [E] Error during startup, terminating
2024-04-11T02:17:42 [W] Error details for Error during startup, terminating: <OpenSSL::PKey::PKeyError>: Could not parse PKey
~~~

The private key seems alright:

~~~
ls -lrt /etc/foreman-proxy
total 52
rw-rr-. 1 root root 0 Apr 3 12:57 migration_state
rr----. 1 root foreman-proxy 2529 Apr 11 02:08 ssl_ca.pem
rr----. 1 root foreman-proxy 2529 Apr 11 02:08 foreman_ssl_ca.pem
rw-r----. 1 root foreman-proxy 771 Apr 11 02:08 ansible.env
rw-r----. 1 root foreman-proxy 3438 Apr 11 02:08 settings.yml
rr----. 1 root foreman-proxy 3272 Apr 11 02:08 ssl_key.pem
rrr-. 1 root foreman-proxy 8477 Apr 11 02:08 ssl_cert.pem
rr----. 1 root foreman-proxy 3272 Apr 11 02:08 foreman_ssl_key.pem
rrr-. 1 root foreman-proxy 8483 Apr 11 02:08 foreman_ssl_cert.pem
drwxr-xr-x. 2 root root 4096 Apr 11 02:17 settings.d
~~~

Version-Release number of selected component (if applicable):

6.16

How reproducible:

Easy

Steps to Reproduce:

Install Satellite 6.16 on RHEL9 with FIPS enabled

Actual results:

The installer failed

Expected results:

the installer should complete successfully.

Additional info: