SSL VPN Connection with JAVA

[StanB1234]

Hey there, I'm trying to create a vpn connection to a Fortigate firewall with JAVA. Something similar to OpenFortiVPN. I've tried to read the source code in C but that was not very helpful. To build up a socket connection in JAVA is not a problem. But how do I authenticate to the firewall and create the vpn tunnel? Maybe anyone can help me with that.