#!/bin/bash

HOST=""
while [ -z "$HOST" ]; do
    echo -ne "\nWhich host are we generating a key for: "
    read HOST
done

REVHOST=`host $HOST | sed -e "s/$HOST.* has address //g"`

echo -ne "\nWhat IP address should be allowed to log in with this key?"
echo -ne "\n[$REVHOST] "
read IP

if [ -z "$IP" ]; then IP="$REVHOST"; fi


ssh-keygen -t dsa -N "" -C "Rsync Snapshot Backup Auto-Login for $HOST" -f "$HOST"_rsync_snapshot_autologin

echo "command=\"sudo /usr/local/bin/rsync_snapshot_receiver snapshot_configs/$HOST.conf\",from=\"$IP\",no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty" `cat "$HOST"_rsync_snapshot_autologin.pub` >> ~/.ssh/authorized_keys && rm -f "$HOST"_rsync_snapshot_autologin.pub

echo -ne "\nCreated new DSA keypair, and added public key to "`whoami`"'s keyring."
echo -ne "\nYou should copy the keyfile ${HOST}_rsync_snapshot_autologin"
echo -ne "\nto the machine that will be backing up to this account.\n\n";