Script plugin for OpenVPN, using Kingsoft SSO as authentication backend.

Built and tested on Ubuntu Server 18.04 LTS.

1. Install GraalVM and native-image (>= 19.3.1, Java 11)

2. Run build.sh

   export GRAALVM_HOME=<GraalVM Install Dir>
   export JAVA_HOME=$GRAALVM_HOME
   ./build.sh

After build step, you need to deploy files in the build directory to the server running OpenVPN:

1. Configure environment variables in build/auth-kingsoft-sso.conf

2. Copy all files to /opt/openvpn/ with owner root, with permissions:

   $ ll -h /opt/openvpn/
   total 22M
   drwxr-xr-x 2 root root 4.0K Oct 29 19:30 ./
   drwxr-xr-x 4 root root 4.0K Oct 29 17:44 ../
   -rw-r--r-- 1 root root  153 Oct 29 18:22 auth-kingsoft-sso.conf
   -rwxr-xr-x 1 root root  386 Oct 29 19:30 auth-kingsoft-sso.sh*
   -rwxr-xr-x 1 root root  22M Oct 29 17:56 openvpn-auth-kingsoft-sso*
   

3. Add the following to OpenVPN server-side configuration file:

   auth-user-pass-verify /opt/openvpn/auth-kingsoft-sso.sh via-file
   

4. Restart the OpenVPN service.