Refactor TLSA service checks

[dane-monitoring-plugins.git] / check_dane / smtp.py

diff --git a/check_dane/smtp.py b/check_dane/smtp.py
new file mode 100644 (file)
index 0000000..6450fc8
--- /dev/null
+++ b/check_dane/smtp.py
@@ -0,0 +1,133 @@
+#!/usr/bin/python3
+
+#!/usr/bin/python3
+
+from __future__ import print_function
+
+import argparse
+import logging
+
+from ssl import SSLContext, PROTOCOL_TLSv1_2, CERT_REQUIRED
+from socket import socket
+
+from check_dane.cert import add_certificate_options
+from check_dane.abstract import DaneChecker
+
+
+class SmtpDaneChecker(DaneChecker):
+    def _init_connection(self, family, host, port):
+
+        if self.ssl:
+            connection = self._sslcontext.wrap_socket(socket(family),
+                                                      server_hostname=host)
+            connection.connect((host, port))
+            answer = connection.recv(512)
+            logging.debug(answer)
+
+            connection.send(b"EHLO localhost\r\n")
+            answer = connection.recv(512)
+            logging.debug(answer)
+
+        else:
+            connection = socket(family=family)
+            connection.connect((host, port))
+            answer = connection.recv(512)
+            logging.debug(answer)
+
+            connection.send(b"EHLO localhost\r\n")
+            answer = connection.recv(512)
+            logging.debug(answer)
+
+            connection.send(b"STARTTLS\r\n")
+            answer = connection.recv(512)
+            logging.debug(answer)
+
+            connection = self._sslcontext.wrap_socket(connection, server_hostname=host)
+            connection.do_handshake()
+
+            connection.send(b"EHLO localhost\r\n")
+            answer = connection.recv(512)
+            logging.debug(answer)
+
+        return connection
+
+
+    @property
+    def port(self):
+        return self._port
+
+
+    @property
+    def ssl(self):
+        return self._ssl
+
+
+    def _close_connection(self, connection):
+        connection.send(b"QUIT\r\n")
+        answer = connection.recv(512)
+        logging.debug(answer)
+        connection.close()
+
+
+    def __init__(self):
+        self._port = None
+        self._ssl = None
+        DaneChecker.__init__(self)
+
+
+    def set_args(self, args):
+        DaneChecker.set_args(self, args)
+
+        self._ssl = args.ssl
+        if args.port == 0:
+            self._port = 465 if args.ssl else 25
+        else:
+            self._port = args.port
+
+        sslcontext = SSLContext(PROTOCOL_TLSv1_2)
+        sslcontext.verify_mode = CERT_REQUIRED
+        sslcontext.load_verify_locations(args.castore)
+
+        self._sslcontext = sslcontext
+
+
+    def generate_menu(self, argparser):
+        DaneChecker.generate_menu(self, argparser)
+        argparser.add_argument("-p", "--port",
+                               action="store", type=int, default=0,
+                               help="SMTP port")
+        argparser.add_argument("--ssl",
+                               action="store_true",
+                               help="Use direct TLS connection instead of starttls (default: disabled)")
+
+
+
+
+
+def main():
+    logging.basicConfig(format='%(levelname)5s %(message)s')
+    checker = SmtpDaneChecker()
+    parser = argparse.ArgumentParser()
+
+    parser.add_argument("--verbose", action="store_true")
+    parser.add_argument("--quiet", action="store_true")
+
+    checker.generate_menu(parser)
+    add_certificate_options(parser)
+
+    args = parser.parse_args()
+    checker.set_args(args)
+
+    if args.verbose:
+        logging.getLogger().setLevel(logging.DEBUG)
+    elif args.quiet:
+        logging.getLogger().setLevel(logging.WARNING)
+    else:
+        logging.getLogger().setLevel(logging.INFO)
+
+    return checker.check()
+
+
+if __name__ == '__main__':
+    import sys
+    sys.exit(main())