CURL with .cer certificate

I have an Intenet Banking account which I access based on username, password and a .cer certificate, on Windows OS. The Intenet Banking can only be accessed with Internet Explorer. Now, I need to access this account with PHP / CURL. My webserver runs CentOS. The internet banking platform is here: [login to view URL] I will provide the username, the password and the data needed for the creation of the certificate.