[strongSwan] xauthrsa and iOS

[Michael Durket]

Is there a way to specify in Strongswan 5.0.1 an authentication combination of xauth-pam and rsa? Rather than storing accounts and passwords for XAUTH authentication in ipsec.secrets  I'd like to have xauth use PAM to look up accounts and passwords. There's an xauth-pam method, but I don't see how to get it to work with RSA certificates as well so iOS devices can connect.