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#!/usr/bin/python
# -*- mode: python; coding: utf-8 -*-
#
# Mandos Monitor - Control and monitor the Mandos server
#
# Copyright © 2008-2014 Teddy Hogeborn
# Copyright © 2008-2014 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@recompile.se>.
#
from __future__ import (division, absolute_import, print_function,
unicode_literals)
try:
from future_builtins import *
except ImportError:
pass
import sys
import argparse
import locale
import datetime
import re
import os
import collections
import doctest
import dbus
if sys.version_info[0] == 2:
str = unicode
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",
"ExtendedTimeout" : "Extended Timeout"
}
defaultkeywords = ("Name", "Enabled", "Timeout", "LastCheckedOK")
domain = "se.recompile"
busname = domain + ".Mandos"
server_path = "/"
server_interface = domain + ".Mandos"
client_interface = domain + ".Mandos.Client"
version = "1.6.7"
def milliseconds_to_string(ms):
td = datetime.timedelta(0, 0, 0, ms)
return ("{days}{hours:02}:{minutes:02}:{seconds:02}"
.format(days = "{}T".format(td.days) if td.days else "",
hours = td.seconds // 3600,
minutes = (td.seconds % 3600) // 60,
seconds = td.seconds % 60,
))
def rfc3339_duration_to_delta(duration):
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
>>> rfc3339_duration_to_delta("P7D")
datetime.timedelta(7)
>>> rfc3339_duration_to_delta("PT60S")
datetime.timedelta(0, 60)
>>> rfc3339_duration_to_delta("PT60M")
datetime.timedelta(0, 3600)
>>> rfc3339_duration_to_delta("PT24H")
datetime.timedelta(1)
>>> rfc3339_duration_to_delta("P1W")
datetime.timedelta(7)
>>> rfc3339_duration_to_delta("PT5M30S")
datetime.timedelta(0, 330)
>>> rfc3339_duration_to_delta("P1DT3M20S")
datetime.timedelta(1, 200)
"""
# Parsing an RFC 3339 duration with regular expressions is not
# possible - there would have to be multiple places for the same
# values, like seconds. The current code, while more esoteric, is
# cleaner without depending on a parsing library. If Python had a
# built-in library for parsing we would use it, but we'd like to
# avoid excessive use of external libraries.
# New type for defining tokens, syntax, and semantics all-in-one
Token = collections.namedtuple("Token",
("regexp", # To match token; if
# "value" is not None,
# must have a "group"
# containing digits
"value", # datetime.timedelta or
# None
"followers")) # Tokens valid after
# this token
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
# the "duration" ABNF definition in RFC 3339, Appendix A.
token_end = Token(re.compile(r"$"), None, frozenset())
token_second = Token(re.compile(r"(\d+)S"),
datetime.timedelta(seconds=1),
frozenset((token_end,)))
token_minute = Token(re.compile(r"(\d+)M"),
datetime.timedelta(minutes=1),
frozenset((token_second, token_end)))
token_hour = Token(re.compile(r"(\d+)H"),
datetime.timedelta(hours=1),
frozenset((token_minute, token_end)))
token_time = Token(re.compile(r"T"),
None,
frozenset((token_hour, token_minute,
token_second)))
token_day = Token(re.compile(r"(\d+)D"),
datetime.timedelta(days=1),
frozenset((token_time, token_end)))
token_month = Token(re.compile(r"(\d+)M"),
datetime.timedelta(weeks=4),
frozenset((token_day, token_end)))
token_year = Token(re.compile(r"(\d+)Y"),
datetime.timedelta(weeks=52),
frozenset((token_month, token_end)))
token_week = Token(re.compile(r"(\d+)W"),
datetime.timedelta(weeks=1),
frozenset((token_end,)))
token_duration = Token(re.compile(r"P"), None,
frozenset((token_year, token_month,
token_day, token_time,
token_week)))
# Define starting values
value = datetime.timedelta() # Value so far
found_token = None
followers = frozenset((token_duration,)) # Following valid tokens
s = duration # String left to parse
# Loop until end token is found
while found_token is not token_end:
# Search for any currently valid tokens
for token in followers:
match = token.regexp.match(s)
if match is not None:
# Token found
if token.value is not None:
# Value found, parse digits
factor = int(match.group(1), 10)
# Add to value so far
value += factor * token.value
# Strip token from string
s = token.regexp.sub("", s, 1)
# Go to found token
found_token = token
# Set valid next tokens
followers = found_token.followers
break
else:
# No currently valid tokens were found
raise ValueError("Invalid RFC 3339 duration")
# End token found
return value
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)
"""
try:
return rfc3339_duration_to_delta(interval)
except ValueError:
pass
value = datetime.timedelta(0)
regexp = re.compile(r"(\d+)([dsmhw]?)")
for num, suffix in regexp.findall(interval):
if suffix == "d":
value += datetime.timedelta(int(num))
elif suffix == "s":
value += datetime.timedelta(0, int(num))
elif suffix == "m":
value += datetime.timedelta(0, 0, 0, 0, int(num))
elif suffix == "h":
value += datetime.timedelta(0, 0, 0, 0, 0, int(num))
elif suffix == "w":
value += datetime.timedelta(0, 0, 0, 0, 0, 0, int(num))
elif suffix == "":
value += datetime.timedelta(0, 0, 0, int(num))
return value
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", "ExtendedTimeout"):
return milliseconds_to_string(value)
return str(value)
# Create format string to print table rows
format_string = " ".join("{{{key}:{width}}}".format(
width = max(len(tablewords[key]),
max(len(valuetostring(client[key],
key))
for client in
clients)),
key = key) for key in keywords)
# Print header line
print(format_string.format(**tablewords))
for client in clients:
print(format_string.format(**{ key:
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.extended_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 {}".format(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("--extended-timeout",
help="Set extended 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=argparse.FileType(mode="rb"),
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("--check", action="store_true",
help="Run self-test")
parser.add_argument("client", nargs="*", help="Client name")
options = parser.parse_args()
if has_actions(options) and not (options.client or 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.")
if options.check:
fail_count, test_count = doctest.testmod()
sys.exit(os.EX_OK if fail_count == 0 else 1)
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:
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 = { bus.get_object(busname, path): properties
for path, properties in mandos_clients.items() }
else:
for name in options.client:
for path, client in mandos_clients.items():
if client["Name"] == name:
client_objc = bus.get_object(busname, path)
clients[client_objc] = client
break
else:
print("Client not found on server: {!r}"
.format(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",
"ExtendedTimeout")
else:
keywords = defaultkeywords
print_clients(clients.values(), keywords)
else:
# Process each client in the list by all selected options
for client in clients:
def set_client_prop(prop, value):
"""Set a Client D-Bus property"""
client.Set(client_interface, prop, value,
dbus_interface=dbus.PROPERTIES_IFACE)
def set_client_prop_ms(prop, value):
"""Set a Client D-Bus property, converted
from a string to milliseconds."""
set_client_prop(prop,
string_to_delta(value).total_seconds()
* 1000)
if options.remove:
mandos_serv.RemoveClient(client.__dbus_object_path__)
if options.enable:
set_client_prop("Enabled", dbus.Boolean(True))
if options.disable:
set_client_prop("Enabled", dbus.Boolean(False))
if options.bump_timeout:
set_client_prop("LastCheckedOK", "")
if options.start_checker:
set_client_prop("CheckerRunning", dbus.Boolean(True))
if options.stop_checker:
set_client_prop("CheckerRunning", dbus.Boolean(False))
if options.is_enabled:
sys.exit(0 if client.Get(client_interface,
"Enabled",
dbus_interface=
dbus.PROPERTIES_IFACE)
else 1)
if options.checker is not None:
set_client_prop("Checker", options.checker)
if options.host is not None:
set_client_prop("Host", options.host)
if options.interval is not None:
set_client_prop_ms("Interval", options.interval)
if options.approval_delay is not None:
set_client_prop_ms("ApprovalDelay",
options.approval_delay)
if options.approval_duration is not None:
set_client_prop_ms("ApprovalDuration",
options.approval_duration)
if options.timeout is not None:
set_client_prop_ms("Timeout", options.timeout)
if options.extended_timeout is not None:
set_client_prop_ms("ExtendedTimeout",
options.extended_timeout)
if options.secret is not None:
set_client_prop("Secret",
dbus.ByteArray(options.secret.read()))
if options.approved_by_default is not None:
set_client_prop("ApprovedByDefault",
dbus.Boolean(options
.approved_by_default))
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()
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