]>
git.siccegge.de Git - dane-monitoring-plugins.git/blob - check_dane_smtp
57f352d825b34a0d08a3c1afc4e7c5718c1bed19
5 from __future__
import print_function
11 from socket
import socket
, AF_INET6
, AF_INET
, create_connection
12 from ssl
import SSLContext
, PROTOCOL_TLSv1_2
, CERT_REQUIRED
, cert_time_to_seconds
, SSLError
, CertificateError
, create_default_context
13 from unbound
import ub_ctx
, idn2dname
, ub_strerror
15 from check_dane
.tlsa
import verify_tlsa_record
17 def init_connection(sslcontext
, args
):
21 port
= 465 if args
.port
== 0 else args
.port
22 connection
= sslcontext
.wrap_socket(socket(AF_INET
),
24 connection
.connect((host
, port
))
27 port
= 25 if args
.port
== 0 else args
.port
29 connection
= create_connection((host
, port
))
30 answer
= connection
.recv(512)
33 connection
.send(b
"EHLO localhost\r\n")
34 answer
= connection
.recv(512)
37 connection
.send(b
"STARTTLS\r\n")
38 answer
= connection
.recv(512)
41 connection
= sslcontext
.wrap_socket(connection
, server_hostname
=host
)
42 connection
.do_handshake()
47 def close_connection(connection
):
48 connection
.send(b
"QUIT\r\n")
49 answer
= connection
.recv(512)
54 sslcontext
= SSLContext(PROTOCOL_TLSv1_2
)
55 sslcontext
.verify_mode
= CERT_REQUIRED
56 sslcontext
.load_verify_locations(args
.castore
)
59 resolver
.add_ta_file(args
.ancor
)
61 return sslcontext
, resolver
65 logging
.basicConfig(format
='%(levelname)5s %(message)s')
66 parser
= argparse
.ArgumentParser()
67 parser
.add_argument("Host")
69 parser
.add_argument("--verbose", action
="store_true")
70 parser
.add_argument("--quiet", action
="store_true")
71 parser
.add_argument("-p", "--port",
72 action
="store", type=int, default
=0,
74 parser
.add_argument("--ssl",
76 help="Use direct TLS connection instead of starttls (default: disabled)")
77 parser
.add_argument("--check-dane",
79 help="Verify presented certificate via DANE (default: enabled)")
80 parser
.add_argument("--check-ca",
82 help="Verify presented certificate via the CA system (default: enabled)")
83 parser
.add_argument("--check-expire",
85 help="Verify presented certificate for expiration (default: enabled)")
87 parser
.add_argument("-a", "--ancor",
88 action
="store", type=str, default
="/etc/unbound/root.key",
89 help="DNSSEC root ancor")
90 parser
.add_argument("--castore", action
="store", type=str,
91 default
="/etc/ssl/certs/ca-certificates.crt",
92 help="ca certificate bundle")
94 group
= parser
.add_mutually_exclusive_group()
95 group
.add_argument("-6", "--6", action
="store_true", help="check via IPv6 only")
96 group
.add_argument("-4", "--4", action
="store_true", help="check via IPv4 only")
97 group
.add_argument("--64", action
="store_false", help="check via IPv4 and IPv6 (default)")
99 args
= parser
.parse_args()
102 logging
.getLogger().setLevel(logging
.DEBUG
)
104 logging
.getLogger().setLevel(logging
.WARNING
)
106 logging
.getLogger().setLevel(logging
.INFO
)
110 port
= 465 if args
.ssl
else 25
111 host
= args
.Host
.encode('idna').decode()
113 sslcontext
, resolver
= init(args
)
115 connection
= init_connection(sslcontext
, args
)
116 except ConnectionRefusedError
:
117 logging
.error("Connection refused")
120 retval
= verify_tlsa_record(resolver
, "_%d._tcp.%s" % (port
, host
), connection
.getpeercert(binary_form
=True))
122 close_connection(connection
)
126 if __name__
== '__main__':