#!/bin/sh

# Add new server certificates to tlsproxy (also see below).
#
# Requires certtool (from GnuTLS).
#
# Copyright (C) 2011-2014  Simon Ruderich
#
# 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 3 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/>.


set -e

if test "$#" -ne 1 && test "$#" -ne 2; then
    echo "Usage: $0 <hostname> [<server-certificate>]"
    echo
    echo "Add the server certificate <server-certificate> (as .pem file) for "
    echo "<hostname> to tlsproxy. <server-certificate> is not modified."
    echo
    echo "If <server-certificate> is not given the certificate (PEM format) "
    echo "is read from stdin."
    echo
    echo "The server certificate is NOT validated in any way, you must do "
    echo "that before using this command or you risk using an insecure "
    echo "certificate!"
    echo
    echo "Must be run in the tlsproxy directory where other configuration "
    echo "files like proxy-ca.pem are stored."
    exit 1
fi

tempfile=`mktemp`
trap 'rm -f "$tempfile"' EXIT

# Generate server certificate for given host.
echo 'organization = tlsproxy' > "$tempfile"
echo "cn = $1"                >> "$tempfile"
echo tls_www_server           >> "$tempfile"
echo encryption_key           >> "$tempfile"
echo signing_key              >> "$tempfile"
echo 'expiration_days = 3650' >> "$tempfile"
certtool --generate-certificate \
         --load-privkey proxy-key.pem \
         --load-ca-certificate proxy-ca.pem \
         --load-ca-privkey proxy-ca-key.pem \
         --template "$tempfile" \
         --outfile "certificate-$1-proxy.pem"
rm "$tempfile"

if test "x$2" = x; then
    echo 'Please enter server certificate (Ctrl-D to terminate input).'
    cat > "certificate-$1-server.pem"
else
    cp "$2" "certificate-$1-server.pem"
fi

echo done