#!/usr/bin/env perl -w
#
# InspIRCd -- Internet Relay Chat Daemon
#
#   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
#   Copyright (C) 2007 Craig Edwards <craigedwards@brainbox.cc>
#   Copyright (C) 2013 Peter Powell <petpow@saberuk.com>
#
# This file is part of InspIRCd.  InspIRCd 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, version 2.
#
# 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/>.
#


BEGIN {
	require 5.8.0;
}

use strict;
use warnings FATAL => qw(all);

use File::Temp();

# IMPORTANT: This script has to be able to run by itself so that it can be used
#            by binary distributions where the make/utilities.pm module will not
#            be available!

sub prompt($$) {
	my ($question, $default) = @_;
	print "$question\n";
	print "[$default] => ";
	chomp(my $answer = <STDIN>);
	print "\n";
	return $answer ? $answer : $default;
}

if ($#ARGV != 0 || $ARGV[0] !~ /gnutls|openssl/i) {
	print "Syntax: genssl <gnutls|openssl>\n";
	exit 1;
}

my $common_name = prompt('What is the hostname of your server?', 'irc.example.com');
my $email = prompt('What email address can you be contacted at?', 'example@example.com');
my $unit = prompt('What is the name of your unit?', 'Server Admins');
my $organization = prompt('What is the name of your organization?', 'Example IRC Network');
my $city = prompt('What city are you located in?', 'Example City');
my $state = prompt('What state are you located in?', 'Example State');
my $country = prompt('What is the ISO 3166-1 code for the country you are located in?', 'XZ');
my $days = prompt('How many days do you want your certificate to be valid for?', '365');

# Contains the exit code of openssl/gnutls-certtool.
my $status = 0;

if (lc $ARGV[0] eq 'gnutls') {
	my $tmp = new File::Temp();
	print $tmp <<__GNUTLS_END__;
cn              = "$common_name"
email           = "$email"
unit            = "$unit"
organization    = "$organization"
locality        = "$city"
state           = "$state"
country         = "$country"
expiration_days = $days
tls_www_client
tls_www_server
signing_key
encryption_key
cert_signing_key
crl_signing_key
code_signing_key
ocsp_signing_key
time_stamping_key
__GNUTLS_END__
	close($tmp);
	my $certtool = `uname -s` eq "Darwin\n" ? 'gnutls-certtool' : 'certtool';
	$status ||= system "$certtool --version  >/dev/null 2>1";
	$status ||= system "$certtool --generate-privkey --outfile key.pem";
	$status ||= system "$certtool --generate-self-signed --load-privkey key.pem --outfile cert.pem --template $tmp";
} elsif (lc $ARGV[0] eq 'openssl') {
	my $tmp = new File::Temp();
	print $tmp <<__OPENSSL_END__;
$country
$state
$city
$organization
$unit
$common_name
$email
__OPENSSL_END__
	close($tmp);
	$status ||= system 'openssl version >/dev/null 2>1';
	$status ||= system "cat $tmp | openssl req -x509 -nodes -newkey rsa:2048 -keyout key.pem -out cert.pem -days $days 2>/dev/null";
	$status ||= system 'openssl dhparam -out dhparams.pem 2048';
}

if ($status) {
	print "SSL generation failed! Are you missing an $ARGV[0] binary package?\n";
	exit 1;
}