]>
git.siccegge.de Git - dane-monitoring-plugins.git/blob - check_dane_smtp
c63cfed4f47c25804f575a29ae642000aa54edb1
5 from __future__
import print_function
11 from socket
import socket
, AF_INET6
, AF_INET
, create_connection
12 from ssl
import SSLError
, CertificateError
, SSLContext
13 from ssl
import PROTOCOL_TLSv1_2
, CERT_REQUIRED
14 from unbound
import ub_ctx
16 from check_dane
.tlsa
import verify_tlsa_record
17 from check_dane
.cert
import verify_certificate
, add_certificate_options
19 def init_connection(sslcontext
, args
):
23 port
= 465 if args
.port
== 0 else args
.port
24 connection
= sslcontext
.wrap_socket(socket(AF_INET
),
26 connection
.connect((host
, port
))
27 answer
= connection
.recv(512)
30 connection
.send(b
"EHLO localhost\r\n")
31 answer
= connection
.recv(512)
35 port
= 25 if args
.port
== 0 else args
.port
37 connection
= create_connection((host
, port
))
38 answer
= connection
.recv(512)
41 connection
.send(b
"EHLO localhost\r\n")
42 answer
= connection
.recv(512)
45 connection
.send(b
"STARTTLS\r\n")
46 answer
= connection
.recv(512)
49 connection
= sslcontext
.wrap_socket(connection
, server_hostname
=host
)
50 connection
.do_handshake()
52 connection
.send(b
"EHLO localhost\r\n")
53 answer
= connection
.recv(512)
59 def close_connection(connection
):
60 connection
.send(b
"QUIT\r\n")
61 answer
= connection
.recv(512)
66 sslcontext
= SSLContext(PROTOCOL_TLSv1_2
)
67 sslcontext
.verify_mode
= CERT_REQUIRED
68 sslcontext
.load_verify_locations(args
.castore
)
71 resolver
.add_ta_file(args
.ancor
)
73 return sslcontext
, resolver
77 logging
.basicConfig(format
='%(levelname)5s %(message)s')
78 parser
= argparse
.ArgumentParser()
79 parser
.add_argument("Host")
81 parser
.add_argument("--verbose", action
="store_true")
82 parser
.add_argument("--quiet", action
="store_true")
83 parser
.add_argument("-p", "--port",
84 action
="store", type=int, default
=0,
86 parser
.add_argument("--ssl",
88 help="Use direct TLS connection instead of starttls (default: disabled)")
89 parser
.add_argument("--check-dane",
91 help="Verify presented certificate via DANE (default: enabled)")
92 parser
.add_argument("--check-ca",
94 help="Verify presented certificate via the CA system (default: enabled)")
95 parser
.add_argument("--check-expire",
97 help="Verify presented certificate for expiration (default: enabled)")
99 parser
.add_argument("-a", "--ancor",
100 action
="store", type=str, default
="/etc/unbound/root.key",
101 help="DNSSEC root ancor")
102 parser
.add_argument("--castore", action
="store", type=str,
103 default
="/etc/ssl/certs/ca-certificates.crt",
104 help="ca certificate bundle")
106 group
= parser
.add_mutually_exclusive_group()
107 group
.add_argument("-6", "--6", action
="store_true", help="check via IPv6 only")
108 group
.add_argument("-4", "--4", action
="store_true", help="check via IPv4 only")
109 group
.add_argument("--64", action
="store_false", help="check via IPv4 and IPv6 (default)")
111 add_certificate_options(parser
)
113 args
= parser
.parse_args()
116 logging
.getLogger().setLevel(logging
.DEBUG
)
118 logging
.getLogger().setLevel(logging
.WARNING
)
120 logging
.getLogger().setLevel(logging
.INFO
)
124 port
= 465 if args
.ssl
else 25
125 host
= args
.Host
.encode('idna').decode()
127 sslcontext
, resolver
= init(args
)
129 connection
= init_connection(sslcontext
, args
)
130 except ConnectionRefusedError
:
131 logging
.error("Connection refused")
134 retval
= verify_certificate(connection
.getpeercert(), args
)
135 nretval
= verify_tlsa_record(resolver
, "_%d._tcp.%s" % (port
, host
),
136 connection
.getpeercert(binary_form
=True))
137 retval
= max(retval
, nretval
)
139 close_connection(connection
)
143 if __name__
== '__main__':