#!/usr/bin/python3
# Show IPSECKEY records generated by libreswan IPsec
# might work on some versions of older openswan as well
#
# Copyright 2015 Paul Wouters <pwouters@redhat.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 2 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

VERSION = "3.4"

import os
import sys
import subprocess
import optparse
import base64
import time
import hashlib

ipsec = "/usr/sbin/ipsec"
if not os.path.isfile(ipsec):
	ipsec = "/usr/local/sbin/ipsec"
if not os.path.isfile(ipsec):
	print("ipseckey: ipsec command not found (not a libreswan or openswan IPsec servers?)", file=sys.stderr)
	sys.exit(1)

def show_version():
	print("sshfp version: " + VERSION, file=sys.stderr)

def main():

	parser = optparse.OptionParser()
	parser.add_option("-v", "--version",
			action="store_true",
			dest="version",
			help="print version information and exit")
	(options, args) = parser.parse_args()

	if options.version:
		show_version()
		sys.exit(0)

	if os.geteuid() != 0:
		print("ipseckey: root access is needed to read the IPsec NSS database for the public key", file=sys.stderr)
		sys.exit(2)

	cmd = [ipsec, "showhostkey", "--ipseckey"]
	process = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True)
	(stdout, stderr) = process.communicate()
	print(stdout)

if __name__ == "__main__":
	main()
