#! /bin/sh
#
# $Id: mkesmtpdcert.in,v 1.8 2007/11/04 21:17:03 mrsam Exp $
#
# Copyright 2000-2007 Double Precision, Inc.  See COPYING for
# distribution information.
#
# This is a short script to q`uickly generate a self-signed X.509 key for
# ESMTP STARTTLS.  Normally this script would get called by an automatic
# package installation routine.

if test "openssl" = "openssl"
then
	test -x /usr/bin/openssl || exit 0
else
	test -x /usr/bin/certtool || exit 0
fi

if test -f /etc/courier/certs/esmtpd.pem
then
	echo "/etc/courier/certs/esmtpd.pem already exists."
	exit 1
fi

cleanup() {
	rm -f /etc/courier/certs/esmtpd.rand
	rm -f /etc/courier/certs/esmtpd.pem
	rm -f /etc/courier/certs/esmtpd.key
	rm -f /etc/courier/certs/esmtpd.cert
	exit 1
}

cd /etc/courier/certs

if test "openssl" = "openssl"
then
	cp /dev/null /etc/courier/certs/esmtpd.pem
	chmod 600 /etc/courier/certs/esmtpd.pem
	chown daemon /etc/courier/certs/esmtpd.pem
	dd if=/dev/urandom of=/etc/courier/certs/esmtpd.rand count=1 2>/dev/null
	/usr/bin/openssl req -new -x509 -days 365 -nodes \
		  -config /etc/courier/esmtpd.cnf -out /etc/courier/certs/esmtpd.pem -keyout /etc/courier/certs/esmtpd.pem || cleanup
	/usr/bin/openssl gendh -rand /etc/courier/certs/esmtpd.rand 512 >>/etc/courier/certs/esmtpd.pem || cleanup
	/usr/bin/openssl x509 -subject -dates -fingerprint -noout -in /etc/courier/certs/esmtpd.pem || cleanup
	rm -f /etc/courier/certs/esmtpd.rand
else
	cp /dev/null /etc/courier/certs/esmtpd.key
	chmod 600 /etc/courier/certs/esmtpd.key
	cp /dev/null /etc/courier/certs/esmtpd.cert
	chmod 600 /etc/courier/certs/esmtpd.cert

	/usr/bin/certtool --generate-privkey --outfile esmtpd.key
	/usr/bin/certtool --generate-self-signed --load-privkey esmtpd.key --outfile esmtpd.cert --template /etc/courier/esmtpd.cnf
	/usr/bin/certtool --generate-dh-params >>esmtpd.cert
	cat esmtpd.key esmtpd.cert >esmtpd.pem
	rm -f esmtpd.key esmtpd.cert
fi
