#!/bin/bash
#
#   SAK -  SSH Authorized Keys Creator
#
#   Copyright (c) 2003 Sergi Coll 
#   Copyright (c) 2013 Sergi Coll http://bloc.sergicoll.com/
#   GLPv2

VER=0.3

#### CONFIG ####

lOCALUSER=`whoami`
LOCALHOST=`hostname`

#### FUNCIONS ####

function help
{
echo ""
echo "SAK - SSH AUTHORIZED KEYS CREATOR - v$VER - http://www.sim00.net/"
echo "Ús: "`basename $0`" [OPCIO] [PARAMETRES]"
echo ""
echo "   -h <host>       Ordinador remot"
echo "   -u <usuari>     Usuari remot"
echo "   -C <comentari>  Comentari"
echo ""
}

#### SCRIPT ####

while getopts "h:u:C:" OPTION; do

case "$OPTION" in

         h) HOST="$OPTARG" ;;
         u) USER="$OPTARG" ;;
         C) COMENTARI="$OPTARG" ;;
        \?) help ;;
esac

done

if [ $# -lt "3" ]; then
        help
	exit
fi

echo ""
echo "-= CREACIO DE CLAUS AUTORITZADES SSH =-"
echo ""
echo "Ordinador Local: $LOCALHOST"
echo "Ordinador Remot: $HOST"
echo ""
echo "Usuari Local: $LOCALUSER"
echo "Usuari Remot: $USER"
echo ""
echo "Comprovant existència del directori local .ssh"
echo ""

if [ ! -d ~/.ssh ] ; then  
	echo "Creant directori .ssh"
	mkdir ~/.ssh 
fi 
chmod 0700 ~/.ssh

echo " - = Creació de directori remot .ssh = - "

ssh -2 -T $USER@$HOST <<EOC
echo " - = Comprovant existència del directori remot .ssh = - "

if [ ! -d ~/.ssh ] ; then
        echo "Creant directori .ssh"
        mkdir ~/.ssh
fi

chmod 0700 ~/.ssh
EOC

echo " - = Creació de claus RSA = - "

ssh-keygen -t rsa -C "$COMENTARI"

echo " - = Enviament de claus públiques al host $HOST = -"

cat ~/.ssh/id_rsa.pub|ssh $USER@$HOST 'cat >>~/.ssh/authorized_keys'