Before proceeding, if you have downloaded or received a zip file that contains all the various certificate and key files, you should – right click the zip file, select Properties, and click “Unblock” (if that is displayed, otherwise Windows won’t let you use some of the files after unzipping).
Extract/place the provided files into the website’s certs folder –
If the Private Key (ssl.key) was generated by StartCom for you, you’ll need to remove the password that is set on it (as it’s not needed, and also Apache on Windows cannot use password protected Keys) –
openssl rsa -in ssl.key -out ssl.key
This will ask you for the password, remove it from the key, and save the key back into the same file.
Create the Bundle file that packages all intermediate certificates (as 1_root_bundle.crt, but only if this file has not been already provided)…
copy /B intermediate.crt + root.crt 1_root_bundle.crt
This will create a bundle file named “1_root_bundle.crt” containing the needed CA (Certificate Authority) intermediate certificates which establish the chain between your public certificate up to the root CA certificate.
Then update the website’s SSL VirtualHost file with –
SSLCertificateFile "C:/WampDeveloper/Websites/www.example.com/certs/ssl.crt" SSLCertificateKeyFile "C:/WampDeveloper/Websites/www.example.com/certs/ssl.key" SSLCertificateChainFile "C:/WampDeveloper/Websites/www.example.com/certs/1_root_bundle.crt"
Usually nothing more needs to be changed in the VirtualHost (as WAMPs such as WampDeveloper Pro have all other parts of SSL pre-configured).
Save the VirtualHost file and restart Apache.