I am developing a software for niche market. The software works like a website builder and my clients can use their custom domains. I use Apache and I have a single virtual host. The application fetches the right configuration and content with $HTTP_HOST variable.

Everything works fine, but the problem begins with SSL certificates. I am searching a solution where I can add new domains without changing Apache configuration, something like this (I know, it doesn’t work).

<VirtualHost *:443>

ServerName ${HTTP_HOST}

SSLEngine on

SSLCertificateFile /path/to/${HTTP_HOST}.cert

SSLCertificateKeyFile /path/to/${HTTP_HOST}.key

</VirtualHost>

I have googled a lot but found no solution. Is there any solution? How the all the website builder like, wix.com, jimdo.com and wordpress.com handle this problem?