Troubleshooting Apache HTTP Server Startup Failure on Satellite 6 or External Capsule 6 and OpenSSL Key Values Mismatch Error

Issue

• The Apache HTTP Server fails to start on Red Hat Satellite 6 or ExternalCapsule 6, accompanied by an OpenSSL::SSL::SSLError with the message "SSL_CTX_use_PrivateKey: key values mismatch."

• Upon starting the Apache HTTP Server on Red Hat Satellite 6 or External Capsule 6, the server fails to start successfully. The system log displays an error message indicating the failure to start the Apache HTTP Server, followed by an OpenSSL::SSL::SSLError with the specific error message "SSL_CTX_use_PrivateKey: key values mismatch."

  Jun 21 19:22:20 satellite systemd: Starting The Apache HTTP Server...
  Jun 21 19:22:20 satellite systemd: httpd.service: main process exited, code=exited, status=1/FAILURE
  Jun 21 19:22:20 satellite systemd: Failed to start The Apache HTTP Server.
  Jun 21 19:22:20 satellite systemd: Unit httpd.service entered failed state.
  Jun 21 19:22:20 satellite systemd: httpd.service failed.
  

  2023-06-21T18:57:24  [I] WEBrick::HTTPServer#start: pid=11833 port=9090
  2023-06-21T18:57:24  [I] Smart proxy has launched on 2 socket(s), waiting for requests
  2023-06-21T18:57:25  [E] OpenSSL::SSL::SSLError: SSL_CTX_use_PrivateKey: key values mismatch
  

  [Wed Jun 21 19:22:20.235100 2023] [ssl:emerg] [pid 31091] AH02311: Fatal error initialising mod_ssl, exiting. See /var/log/httpd/rhsm-pulpcore-https-8443_error_ssl.log for more information
  

  [Wed Jun 21 19:22:20.235024 2023] [ssl:emerg] [pid 31091] AH02238: Unable to configure RSA server private key
  [Wed Jun 21 19:22:20.235077 2023] [ssl:emerg] [pid 31091] SSL Library Error: error:0B080074:x509 certificate routines:X509_check_private_key:key values mismatch