setup-irc-certfp-auth

#!/bin/bash
echo
echo "This script wraps the certificate creation process for use with SASL
client certificate based auth mechanism for IRC networks. Certificates are
associated with nicknames, so you will need one certificate per nickname."
echo
mkdir "$HOME/.irssi/certs" 2>/dev/null
read -r -p 'Enter your IRC nickname: ' NICK
openssl req -x509 -sha256 -new -newkey rsa:4096 -nodes -out "$NICK.pem" -keyout "$NICK.pem"
echo -n "Your SHA1 certificate fingerprint is: "
openssl x509 -noout -in "$NICK.pem" -fingerprint | tr "[:upper:]" "[:lower:]" | tr -d ":"
echo "Register your certificate fingerprint as /msg NickServ CERT ADD <certificate-fingerprint> on respective IRC network."
echo "Moving your $NICK.pem to ~/.irssi/certs"
mv -iv "$NICK.pem" "$HOME/.irssi/certs/"
sleep 2
chmod 0400 "$HOME/.irssi/certs/$NICK.pem"