#!/bin/bash
# ========================================================================== #
#                                                                            #
#    KVMD - The main Pi-KVM daemon.                                          #
#                                                                            #
#    Copyright (C) 2018-2021  Maxim Devaev <mdevaev@gmail.com>               #
#                                                                            #
#    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 <https://www.gnu.org/licenses/>.  #
#                                                                            #
# ========================================================================== #


set -e

if [ `whoami` != root ]; then
	echo "Only root can do that"
	exit 1
fi

if [ "$1" != --do-the-thing ]; then
	echo "This script will generate new self-signed SSL certificates for KVMD Nginx"
	echo "and put them to /etc/kvmd/nginx/ssl. If you're sure of what you're doing,"
	echo "append the option '--do-the-thing' to execute. You can also append --vnc"
	echo "to generate a certificate for VNC not for Nginx."
	exit 1
fi

target="nginx"
if [ "$2" == --vnc ]; then
	target="vnc"
fi

# XXX: Why ECC?
# https://www.leaderssl.com/articles/345-what-is-ecc-and-why-you-should-use-it
# https://www.digitalocean.com/community/tutorials/how-to-create-an-ecc-certificate-on-nginx-for-debian-8
# https://msol.io/blog/tech/create-a-self-signed-ecc-certificate

set -x

export LC_ALL=C

mkdir -p /etc/kvmd/$target/ssl
cd /etc/kvmd/$target/ssl

openssl ecparam -out server.key -name prime256v1 -genkey
openssl req -new -x509 -sha256 -nodes -key server.key -out server.crt -days 3650 \
	-subj "/C=RU/ST=Moscow/L=Moscow/O=Pi-KVM/OU=Pi-KVM/CN=localhost"

chown root:kvmd-$target /etc/kvmd/$target/ssl/*
chmod 400 server.key
chmod 444 server.crt
chmod 755 /etc/kvmd/$target/ssl