#!/bin/bash
# Script to activate public key ssh access
if test -z "$1" ; then
	echo "Usage:"
	echo "mkpbkeyaccess remoteserver [remoteusername] [remoteport]"
	exit 1
fi

if test -z "$2" ; then
	RUSER=$USER
else
	RUSER=$2
fi

if test -z "$3" ; then
	RPORT=22
else
	RPORT=$3
fi

echo "Configure Public key authentification"
echo -n "Local user:	"
echo $USER
echo -n "Remote user:	"
echo $RUSER
echo -n "Server:	"
echo $1
echo -n "Server port:"	
echo $RPORT
echo "Hit any key to proceed, STRG-C to abort"
read 
# Remove ssh Version 1 files
rm -f $HOME/.ssh/known_hosts
rm -f $HOME/.ssh/identity*

if test ! -e "$HOME/.ssh/id_dsa"; then
	echo "Generating new dsa key"
	ssh-keygen -t dsa -q -N "" -f $HOME/.ssh/id_dsa
fi
if test ! -e "$HOME/.ssh/id_rsa"; then
	echo "Generating new rsa key"
	ssh-keygen -t rsa -q -N "" -f $HOME/.ssh/id_rsa
fi
# Add these keys to local authorization (for ssh localhost)
cat $HOME/.ssh/id*.pub >> $HOME/.ssh/authorized_keys2
# Add the keys to the remote servers list
echo "**************************************************************************"
echo "You will now be asked three times for your (remote) password."
echo "This is OK and will hopefully be the last time"
echo "Ignore any file not found/ directory existing messages"
echo "and answer a possible warning with yes"
echo "**************************************************************************"
# Just for sure, ensure ~/.ssh exists
ssh -p $RPORT -l $RUSER $1 mkdir .ssh
scp -P $RPORT $RUSER@$1:.ssh/authorized_keys2 /tmp/authorized_keys2.$USER
cat $HOME/.ssh/id*.pub >> /tmp/authorized_keys2.$USER
scp -P $RPORT /tmp/authorized_keys2.$USER $RUSER@$1:.ssh/authorized_keys2
echo "**************************************************************************"
echo "finished, cleaning up.."
rm /tmp/authorized_keys2.$USER