.ovpn file generator

generate-ovpn.sh

#!/bin/bash
# 
# Copyright (c) 2014 Jorge Nerín <[email protected]>
# Last updated on: Jun/26/2014 by Jorge Nerín
#
############################################################################
#
# .ovpn file generator (OpenVPN configuration files)
#
# It expects to find files with this names: 
# * ca.crt 
# * dh2048.pem
# * tls-auth-static-key.key
# * $1.{crt,key}
#
# Run it "generate-ovpn.sh username" and it'll look for files
# username.crt, username.key and the server files (ca.crt, dh2048.pem,
# tls-auth-static-key.key).  It'll generate a username.ovpn with
# everything included and ready to use.
#
# Edit as needed. At least the SERVER variable, it'll make your life
# easier.
#
############################################################################
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 2 of the License, or
#    (at your option) any later version.
#
#    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, see <http://www.gnu.org/licenses/>.
#
############################################################################

SERVER=your.openvpn.connection.point

# Redirect STDOUT to the file
exec >${1}.ovpn

cat <<EOF 
client

verb 4
connect-retry-max 5
connect-retry 5
resolv-retry 60
comp-lzo

dev tun
remote ${SERVER} 1194 udp

remote-cert-tls server
<ca>
EOF
cat ca.crt
cat <<EOF
</ca>
<key>
EOF
cat ${1}.key
cat <<EOF
</key>
<cert>
EOF
# cat ${1}.crt # Naïve, includes extra headers from crt that are
# troublesome for some clients when importing the file
# Solution from: http://unix.stackexchange.com/a/56432
sed -n '/^-----BEGIN CERTIFICATE-----$/ { p; s///; :a; n; p; ba; }' ${1}.crt
cat <<EOF
</cert>
<tls-auth>
EOF
cat tls-auth-static-key.key
cat <<EOF
</tls-auth>
EOF