/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

import argparse

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 = "1.3.0"

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 = argparse.ArgumentParser()

    parser.add_argument("--version", action="version",

                        version = "%%prog %s" % version,

                        help="show version number and exit")

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

                        help="Select all clients")

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

                        help="Print all fields")

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

                        help="Enable client")

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

                        help="disable client")

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

                        help="Bump timeout for client")

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

                        help="Start checker for client")

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

                        help="Stop checker for client")

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

                        help="Check if client is enabled")

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

                        help="Remove client")

    parser.add_argument("-c", "--checker",

                        help="Set checker command for client")

    parser.add_argument("-t", "--timeout",

                        help="Set timeout for client")

    parser.add_argument("-i", "--interval",

                        help="Set checker interval for client")

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

                        default=None, dest="approved_by_default",

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

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

                        dest="approved_by_default",

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

    parser.add_argument("--approval-delay",

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

    parser.add_argument("--approval-duration",

                        help="Set duration of one client approval")

    parser.add_argument("-H", "--host", help="Set host for client")

    parser.add_argument("-s", "--secret", type=file,

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

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

                        help="Approve any current client request")

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

                        help="Deny any current client request")

    parser.add_argument("client", nargs="*", help="Client name")

    options = parser.parse_args()

    if has_actions(options) and not options.client 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 options.client:

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

                       for path, properties in

                       mandos_clients.iteritems())

    else:

        for name in options.client:

            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()