#!/bin/sh
#
# This script (re)creates a self-signed SSL certificate to be used for FTP/SSL protocol.
#
# Copyright (C) Francesco P. Lovergine <frankie@debian.org>
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2, 
# as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
#

DAYS=365
BITS=2048
KEYDIR=/etc/ssl/private
CERTDIR=/etc/ssl/certs
KEY=$KEYDIR/proftpd.key
CERT=$CERTDIR/proftpd.crt

if [ ! -x /usr/bin/openssl ]; then
	echo "Openssl utility not found"
	exit 1
fi

if [ $(id -u) -ne 0 ]; then
	echo "Run this script as root"
	exit 2
fi

if [ ! -d $KEYDIR -o  ! -d $CERTDIR ]; then
	echo "Target dirs not found"
	exit 3
fi

rm -f $KEY $CERT
/usr/bin/openssl req -x509 -newkey rsa:$BITS \
          -keyout $KEY -out $CERT \
          -nodes -days $DAYS
if [ $? -eq 0 ]; then
chmod 0600 $KEY 
chmod 0644 $CERT
cat <<EOF

Use the following information in your ProFTPD configuration:

TLSRSACertificateFile    $CERT
TLSRSACertificateKeyFile $KEY

See /etc/proftpd/tls.conf for suggested TLS related configuration
items and include that file in your /etc/proftpd/proftpd.conf file.

EOF
else 
	echo "Key generation failed"
	exit 4
fi

exit 0