A tool for getting login details through Two Factor Authentication for the openconnect clients. This tool only generates a config file with the cookie, servercert and host details which can be used to connect to the OpenConnect VPN server.

go get -u github.com/rustycl0ck/go-openconnect-sso
go-openconnect-sso --server='https://vpn.server.myorg.com' --config ~/my-vpn-cookie/cookie.txt

The generate opneconnect config file:

$ cat ~/my-vpn-cookie/cookie.txt
cookie=1234567890ABCDEF123
servercert=4567890DEFABC321
# host=https://vpn-cluster-2.server.myorg.com/

After the file is successfully generated, you can run the following to connect to the VPN server:

openconnect <any-additional-params> --verbose --config ~/my-vpn-cookie/cookie.txt https://vpn-cluster-2.server.myorg.com

Credits: This tool has been inspired by (and ported to go from) https://github.com/vlaci/openconnect-sso