perl - How to pass bash variables (passwords) to IRSSI config file?

I'm using IRSSI and I wonder how can I pass my IRC channel's passwords to the IRSSI config file (~/.irssi/config) without writing them directly in the file.

In Mutt I've an awk command that queries a local file in my encrypted home folder, something like this:

set my_pass1=`awk '/fradeve_gmail:/ {print $2}' ~/.mutt/muttpass`
set my_pass2=`awk '/fradeve_inventati:/ {print $2}' ~/.mutt/muttpass`

Is there a similar solution for IRSSI?

PS: obviously I don't want to keep the IRSSI config file in my encrypted home :)