From: Christoph Egger Date: Fri, 28 Oct 2016 16:18:47 +0000 (+0200) Subject: Basix xmpp check X-Git-Url: https://git.siccegge.de//index.cgi?a=commitdiff_plain;h=41f20efa5664b53e68296c332ad1502773f4baaa;p=dane-monitoring-plugins.git Basix xmpp check --- diff --git a/check_dane_xmpp b/check_dane_xmpp new file mode 100755 index 0000000..1c1f4a6 --- /dev/null +++ b/check_dane_xmpp @@ -0,0 +1,173 @@ +#!/usr/bin/python3 +# +# + +from __future__ import print_function + +import sys +import argparse +import logging + +from socket import socket, AF_INET6, AF_INET, create_connection +from ssl import SSLError, CertificateError, SSLContext +from ssl import PROTOCOL_TLSv1_2, CERT_REQUIRED + +from unbound import ub_ctx + +from check_dane.resolve import Resolver, ResolverException, srv_lookup +from check_dane.tlsa import verify_tlsa_record +from check_dane.cert import verify_certificate, add_certificate_options + +XMPP_OPEN = ("") +XMPP_CLOSE = "" +XMPP_STARTTLS = "" + + +def init_connection(sslcontext, args, family, endpoint, metadata): + host, _ = endpoint + logging.debug("Connecting to %s", endpoint) + + connection = socket(family=family) + connection.connect(endpoint) + + connection.sendall(XMPP_OPEN.format(metadata['type'], args.Host).encode()) + answer = connection.recv(4096) + logging.debug(answer) + + if not '' in answer: + answer = connection.recv(4096) + logging.debug(answer) + + connection.sendall(XMPP_STARTTLS.encode()) + answer = connection.recv(4096) + logging.debug(answer) + + connection = sslcontext.wrap_socket(connection, server_hostname=host) + connection.do_handshake() + + connection.sendall(XMPP_OPEN.format(metadata['type'], args.Host).encode()) + answer = connection.recv(4096) + logging.debug(answer) + + if not '' in answer: + answer = connection.recv(4096) + logging.debug(answer) + + return connection + + +def close_connection(connection): + connection.send(XMPP_CLOSE.encode()) + answer = connection.recv(512) + logging.debug(answer) + + +def init(args): + sslcontext = SSLContext(PROTOCOL_TLSv1_2) + sslcontext.verify_mode = CERT_REQUIRED + sslcontext.load_verify_locations(args.castore) + + resolver = ub_ctx() + resolver.add_ta_file(args.ancor) + + return sslcontext, resolver + + +def main(): + logging.basicConfig(format='%(levelname)5s %(message)s') + parser = argparse.ArgumentParser() + parser.add_argument("Host") + + parser.add_argument("--verbose", action="store_true") + parser.add_argument("--quiet", action="store_true") + # parser.add_argument("-p", "--port", + # action="store", type=int, default=0, + # help="XMPP port") + group = parser.add_mutually_exclusive_group() + group.add_argument("--s2s", action="store_true", + help="Only check server-to-server connections") + group.add_argument("--c2s", action="store_true", + help="Only check client-to-server connections") + # parser.add_argument("--ssl", + # action="store_true", + # help="Use direct TLS connection instead of starttls (default: disabled)") + parser.add_argument("--check-dane", + action="store_false", + help="Verify presented certificate via DANE (default: enabled)") + parser.add_argument("--check-ca", + action="store_false", + help="Verify presented certificate via the CA system (default: enabled)") + parser.add_argument("--check-expire", + action="store_false", + help="Verify presented certificate for expiration (default: enabled)") + + parser.add_argument("-a", "--ancor", + action="store", type=str, default="/etc/unbound/root.key", + help="DNSSEC root ancor") + parser.add_argument("--castore", action="store", type=str, + default="/etc/ssl/certs/ca-certificates.crt", + help="ca certificate bundle") + + group = parser.add_mutually_exclusive_group() + group.add_argument("-6", "--6", action="store_true", dest="use6", help="check via IPv6 only") + group.add_argument("-4", "--4", action="store_true", dest="use4", help="check via IPv4 only") + group.add_argument("--64", action="store_false", dest="use64", help="check via IPv4 and IPv6 (default)") + + add_certificate_options(parser) + + args = parser.parse_args() + + if args.verbose: + logging.getLogger().setLevel(logging.DEBUG) + elif args.quiet: + logging.getLogger().setLevel(logging.WARNING) + else: + logging.getLogger().setLevel(logging.INFO) + + host = args.Host.encode('idna').decode() + + sslcontext, resolver = init(args) + + if args.use6: + afamilies = [AF_INET6] + elif args.use4: + afamilies = [AF_INET6] + else: + afamilies = [AF_INET, AF_INET6] + + xresolver = Resolver(args.ancor) + endpoints = [] + if not args.s2s: + for endpoint, meta in srv_lookup("_xmpp-client._tcp.%s" % host, xresolver): + meta['type'] = 'client' + endpoints.append((endpoint, meta)) + if not args.c2s: + for endpoint, meta in srv_lookup("_xmpp-server._tcp.%s" % host, xresolver): + meta['type'] = 'server' + endpoints.append((endpoint, meta)) + + retval = 0 + for afamily in afamilies: + for endpoint, metadata in endpoints: + host, port = endpoint + try: + connection = init_connection(sslcontext, args, afamily, endpoint, metadata) + except: + logging.exception("Connection refused") + return 2 + + nretval = verify_certificate(connection.getpeercert(), args) + retval = max(retval, nretval) + nretval = verify_tlsa_record(resolver, "_%d._tcp.%s" % (port, host), + connection.getpeercert(binary_form=True)) + retval = max(retval, nretval) + + close_connection(connection) + + return retval + + +if __name__ == '__main__': + sys.exit(main())