#!/bin/bash

declare -rg CERT="/etc/lighttpd/server.pem"
declare -rg CHAIN="/etc/lighttpd/chain.pem"
declare -rg DHPARAM="/etc/lighttpd/dhparam.pem"
declare -rg REDIR_FLAG="/etc/lighttpd/redirect.flag"

if ! [ -s "$DHPARAM" ] && ! ps aux | grep 'openssl dhparam' | grep -q -v grep; then
	openssl dhparam -out "$DHPARAM" 2048 >/dev/null 2>&1
fi

[ -s "$CERT" ] || exit 0

cat <<HEREDOC
\$SERVER["socket"] == ":443" {
	protocol	 = "https://"
	ssl.engine   = "enable"
	ssl.disable-client-renegotiation = "enable"

	# pemfile is cert+privkey, ca-file is the intermediate chain in one file
	ssl.pemfile			   = "$CERT"

	# ECDH/ECDHE ciphers curve strength (see "openssl ecparam -list_curves")
	ssl.ec-curve			  = "secp384r1"
	# Compression is by default off at compile-time, but use if needed
	# ssl.use-compression	 = "disable"

	# Environment flag for HTTPS enabled
	setenv.add-environment = (
		"HTTPS" => "on"
	)

	# intermediate configuration, tweak to your needs
	ssl.use-sslv2 = "disable"
	ssl.use-sslv3 = "disable"
	ssl.honor-cipher-order	= "enable"
	ssl.cipher-list		   = "ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS"
HEREDOC
[ -s "$CHAIN" ] && echo "	ssl.ca-file = \"$CHAIN\""
[ -s "$DHPARAM" ] && echo "	ssl.dh-file          = \"$DHPARAM\""
echo "}"

[ -f "$REDIR_FLAG" ] && cat <<"HEREDOC"
$HTTP["scheme"] == "http" {
	# capture vhost name with regex condition -> %0 in redirect pattern
	# must be the most inner block to the redirect rule
	$HTTP["host"] =~ ".*" {
		url.redirect = ( "^/slx-admin/($|\?|index.php).*" => "https://%0$0" )
		url.redirect-code = 302
	}
}
HEREDOC

exit 0