Automate creation of a Wireguard User Key, Public-Key, PSK

wg-create-user.sh

#!/bin/bash
# Usage: ./wg-create-user.sh my-user
# Creats wiregard key, pub, psk

# Read vars
read -p "Client name: " -e -i $1 CLIENT
# Test vars, files
if [[ "$CLIENT" = "" ]]; then
        echo "Sorry, you need a Client-Name"
        exit 2
fi
if [[ -f $CLIENT.key ]]
then
        echo "ERROR: $CLIENT.key exists on your filesystem."
        exit 3
fi
if [[ -f $CLIENT.pub ]]
then
        echo "ERROR: $CLIENT.pub exists on your filesystem."
        exit 3
fi
if [[ -f $CLIENT.psk ]]
then
        echo "ERROR: $CLIENT.psk exists on your filesystem."
        exit 3
fi
# Functions
newconfig () {
        wg genkey > $CLIENT.key
        wg pubkey < $CLIENT.key > $CLIENT.pub
        wg genpsk > $CLIENT.psk
}
# Run
newconfig "$CLIENT"