/mandos/trunk

#!/usr/bin/python

# -*- mode: python; coding: utf-8 -*-

# 

# Mandos Monitor - Control and monitor the Mandos server

# 

# Copyright © 2008-2010 Teddy Hogeborn

# Copyright © 2008-2010 Björn Påhlsson

# 

# 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 3 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, see <http://www.gnu.org/licenses/>.

# 

# Contact the authors at <mandos@fukt.bsnet.se>.

# 

from __future__ import (division, absolute_import, print_function,

                        unicode_literals)

import sys

import dbus

from optparse import OptionParser

import locale

import datetime

import re

import os

locale.setlocale(locale.LC_ALL, "")

tablewords = {

    "Name": "Name",

    "Enabled": "Enabled",

    "Timeout": "Timeout",

    "LastCheckedOK": "Last Successful Check",

    "LastApprovalRequest": "Last Approval Request",

    "Created": "Created",

    "Interval": "Interval",

    "Host": "Host",

    "Fingerprint": "Fingerprint",

    "CheckerRunning": "Check Is Running",

    "LastEnabled": "Last Enabled",

    "ApprovalPending": "Approval Is Pending",

    "ApprovedByDefault": "Approved By Default",

    "ApprovalDelay": "Approval Delay",

    "ApprovalDuration": "Approval Duration",

    "Checker": "Checker",

    }

defaultkeywords = ("Name", "Enabled", "Timeout", "LastCheckedOK")

domain = "se.bsnet.fukt"

busname = domain + ".Mandos"

server_path = "/"

server_interface = domain + ".Mandos"

client_interface = domain + ".Mandos.Client"

version = "1.2.3"

def timedelta_to_milliseconds(td):

    """Convert a datetime.timedelta object to milliseconds"""

    return ((td.days * 24 * 60 * 60 * 1000)

            + (td.seconds * 1000)

            + (td.microseconds // 1000))

def milliseconds_to_string(ms):

    td = datetime.timedelta(0, 0, 0, ms)

    return ("%(days)s%(hours)02d:%(minutes)02d:%(seconds)02d"

            % { "days": "%dT" % td.days if td.days else "",

                "hours": td.seconds // 3600,

                "minutes": (td.seconds % 3600) // 60,

                "seconds": td.seconds % 60,

                })

def string_to_delta(interval):

    """Parse a string and return a datetime.timedelta

    >>> string_to_delta("7d")

    datetime.timedelta(7)

    >>> string_to_delta("60s")

    datetime.timedelta(0, 60)

    >>> string_to_delta("60m")

    datetime.timedelta(0, 3600)

    >>> string_to_delta("24h")

    datetime.timedelta(1)

    >>> string_to_delta("1w")

    datetime.timedelta(7)

    >>> string_to_delta("5m 30s")

    datetime.timedelta(0, 330)

    """

    timevalue = datetime.timedelta(0)

    regexp = re.compile("\d+[dsmhw]")

    for s in regexp.findall(interval):

        try:

            suffix = unicode(s[-1])

            value = int(s[:-1])

            if suffix == "d":

                delta = datetime.timedelta(value)

            elif suffix == "s":

                delta = datetime.timedelta(0, value)

            elif suffix == "m":

                delta = datetime.timedelta(0, 0, 0, 0, value)

            elif suffix == "h":

                delta = datetime.timedelta(0, 0, 0, 0, 0, value)

            elif suffix == "w":

                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)

            else:

                raise ValueError

        except (ValueError, IndexError):

            raise ValueError

        timevalue += delta

    return timevalue

def print_clients(clients, keywords):

    def valuetostring(value, keyword):

        if type(value) is dbus.Boolean:

            return "Yes" if value else "No"

        if keyword in ("Timeout", "Interval", "ApprovalDelay",

                       "ApprovalDuration"):

            return milliseconds_to_string(value)

        return unicode(value)

    # Create format string to print table rows

    format_string = " ".join("%%-%ds" %

                             max(len(tablewords[key]),

                                 max(len(valuetostring(client[key],

                                                       key))

                                     for client in

                                     clients))

                             for key in keywords)

    # Print header line

    print(format_string % tuple(tablewords[key] for key in keywords))

    for client in clients:

        print(format_string % tuple(valuetostring(client[key], key)

                                    for key in keywords))

def has_actions(options):

    return any((options.enable,

                options.disable,

                options.bump_timeout,

                options.start_checker,

                options.stop_checker,

                options.is_enabled,

                options.remove,

                options.checker is not None,

                options.timeout is not None,

                options.interval is not None,

                options.approved_by_default is not None,

                options.approval_delay is not None,

                options.approval_duration is not None,

                options.host is not None,

                options.secret is not None,

                options.approve,

                options.deny))

def main():

	parser = OptionParser(version = "%%prog %s" % version)

	parser.add_option("-a", "--all", action="store_true",

	                  help="Select all clients")

	parser.add_option("-v", "--verbose", action="store_true",

	                  help="Print all fields")

	parser.add_option("-e", "--enable", action="store_true",

	                  help="Enable client")

	parser.add_option("-d", "--disable", action="store_true",

	                  help="disable client")

	parser.add_option("-b", "--bump-timeout", action="store_true",

	                  help="Bump timeout for client")

	parser.add_option("--start-checker", action="store_true",

	                  help="Start checker for client")

	parser.add_option("--stop-checker", action="store_true",

	                  help="Stop checker for client")

	parser.add_option("-V", "--is-enabled", action="store_true",

	                  help="Check if client is enabled")

	parser.add_option("-r", "--remove", action="store_true",

	                  help="Remove client")

	parser.add_option("-c", "--checker", type="string",

	                  help="Set checker command for client")

	parser.add_option("-t", "--timeout", type="string",

	                  help="Set timeout for client")

	parser.add_option("-i", "--interval", type="string",

	                  help="Set checker interval for client")

        parser.add_option("--approve-by-default", action="store_true",

                          dest="approved_by_default",

                          help="Set client to be approved by default")

        parser.add_option("--deny-by-default", action="store_false",

                          dest="approved_by_default",

                          help="Set client to be denied by default")

        parser.add_option("--approval-delay", type="string",

                          help="Set delay before client approve/deny")

        parser.add_option("--approval-duration", type="string",

                          help="Set duration of one client approval")

	parser.add_option("-H", "--host", type="string",

	                  help="Set host for client")

	parser.add_option("-s", "--secret", type="string",

	                  help="Set password blob (file) for client")

	parser.add_option("-A", "--approve", action="store_true",

	                  help="Approve any current client request")

	parser.add_option("-D", "--deny", action="store_true",

	                  help="Deny any current client request")

	options, client_names = parser.parse_args()

        if has_actions(options) and not client_names and not options.all:

            parser.error("Options require clients names or --all.")

        if options.verbose and has_actions(options):

            parser.error("--verbose can only be used alone or with"

                         " --all.")

        if options.all and not has_actions(options):

            parser.error("--all requires an action.")

        try:

            bus = dbus.SystemBus()

            mandos_dbus_objc = bus.get_object(busname, server_path)

        except dbus.exceptions.DBusException:

            print("Could not connect to Mandos server",

                  file=sys.stderr)

            sys.exit(1)

        mandos_serv = dbus.Interface(mandos_dbus_objc,

                                     dbus_interface = server_interface)

        #block stderr since dbus library prints to stderr

        null = os.open(os.path.devnull, os.O_RDWR)

        stderrcopy = os.dup(sys.stderr.fileno())

        os.dup2(null, sys.stderr.fileno())

        os.close(null)

        try:

            try:

                mandos_clients = mandos_serv.GetAllClientsWithProperties()

            finally:

                #restore stderr

                os.dup2(stderrcopy, sys.stderr.fileno())

                os.close(stderrcopy)

        except dbus.exceptions.DBusException, e:

            print("Access denied: Accessing mandos server through dbus.",

                  file=sys.stderr)

            sys.exit(1)

	# Compile dict of (clients: properties) to process

	clients={}

        if options.all or not client_names:

            clients = dict((bus.get_object(busname, path), properties)

                           for path, properties in

                           mandos_clients.iteritems())

        else:

            for name in client_names:

                for path, client in mandos_clients.iteritems():

                    if client["Name"] == name:

                        client_objc = bus.get_object(busname, path)

                        clients[client_objc] = client

                        break

                else:

                    print("Client not found on server: %r" % name,

                          file=sys.stderr)

                    sys.exit(1)

	if not has_actions(options) and clients:

	    if options.verbose:

	        keywords = ("Name", "Enabled", "Timeout",

                            "LastCheckedOK", "Created", "Interval",

                            "Host", "Fingerprint", "CheckerRunning",

                            "LastEnabled", "ApprovalPending",

                            "ApprovedByDefault",

                            "LastApprovalRequest", "ApprovalDelay",

                            "ApprovalDuration", "Checker")

            else:

                keywords = defaultkeywords

	    print_clients(clients.values(), keywords)

        else:

            # Process each client in the list by all selected options

            for client in clients:

                if options.remove:

                    mandos_serv.RemoveClient(client.__dbus_object_path__)

                if options.enable:

                    client.Enable(dbus_interface=client_interface)

                if options.disable:

                    client.Disable(dbus_interface=client_interface)

                if options.bump_timeout:

                    client.CheckedOK(dbus_interface=client_interface)

                if options.start_checker:

                    client.StartChecker(dbus_interface=client_interface)

                if options.stop_checker:

                    client.StopChecker(dbus_interface=client_interface)

                if options.is_enabled:

                    sys.exit(0 if client.Get(client_interface,

                                             "Enabled",

                                             dbus_interface=dbus.PROPERTIES_IFACE)

                             else 1)

                if options.checker:

                    client.Set(client_interface, "Checker", options.checker,

                               dbus_interface=dbus.PROPERTIES_IFACE)

                if options.host:

                    client.Set(client_interface, "Host", options.host,

                               dbus_interface=dbus.PROPERTIES_IFACE)

                if options.interval:

                    client.Set(client_interface, "Interval",

                               timedelta_to_milliseconds

                               (string_to_delta(options.interval)),

                               dbus_interface=dbus.PROPERTIES_IFACE)

                if options.approval_delay:

                    client.Set(client_interface, "ApprovalDelay",

                               timedelta_to_milliseconds

                               (string_to_delta(options.

                                                approval_delay)),

                               dbus_interface=dbus.PROPERTIES_IFACE)

                if options.approval_duration:

                    client.Set(client_interface, "ApprovalDuration",

                               timedelta_to_milliseconds

                               (string_to_delta(options.

                                                approval_duration)),

                               dbus_interface=dbus.PROPERTIES_IFACE)

                if options.timeout:

                    client.Set(client_interface, "Timeout",

                               timedelta_to_milliseconds

                               (string_to_delta(options.timeout)),

                               dbus_interface=dbus.PROPERTIES_IFACE)

                if options.secret:

                    client.Set(client_interface, "Secret",

                               dbus.ByteArray(open(options.secret,

                                                   "rb").read()),

                               dbus_interface=dbus.PROPERTIES_IFACE)

                if options.approved_by_default is not None:

                    client.Set(client_interface, "ApprovedByDefault",

                               dbus.Boolean(options

                                            .approved_by_default),

                               dbus_interface=dbus.PROPERTIES_IFACE)

                if options.approve:

                    client.Approve(dbus.Boolean(True),

                                   dbus_interface=client_interface)

                elif options.deny:

                    client.Approve(dbus.Boolean(False),

                                   dbus_interface=client_interface)

if __name__ == "__main__":

    main()