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mandos-ctl
1
 
#!/usr/bin/python
2
 
# -*- mode: python; coding: utf-8 -*-
3
 
# 
4
 
# Mandos Monitor - Control and monitor the Mandos server
5
 
# 
6
 
# Copyright © 2008-2012 Teddy Hogeborn
7
 
# Copyright © 2008-2012 Björn Påhlsson
8
 
# 
9
 
# This program is free software: you can redistribute it and/or modify
10
 
# it under the terms of the GNU General Public License as published by
11
 
# the Free Software Foundation, either version 3 of the License, or
12
 
# (at your option) any later version.
13
 
#
14
 
#     This program is distributed in the hope that it will be useful,
15
 
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
16
 
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17
 
#     GNU General Public License for more details.
18
 
# 
19
 
# You should have received a copy of the GNU General Public License
20
 
# along with this program.  If not, see
21
 
# <http://www.gnu.org/licenses/>.
22
 
# 
23
 
# Contact the authors at <mandos@recompile.se>.
24
 
# 
25
 
 
26
 
from __future__ import (division, absolute_import, print_function,
27
 
                        unicode_literals)
28
 
 
29
 
from future_builtins import *
30
 
 
31
 
import sys
32
 
import argparse
33
 
import locale
34
 
import datetime
35
 
import re
36
 
import os
37
 
import collections
38
 
import doctest
39
 
 
40
 
import dbus
41
 
 
42
 
locale.setlocale(locale.LC_ALL, "")
43
 
 
44
 
tablewords = {
45
 
    "Name": "Name",
46
 
    "Enabled": "Enabled",
47
 
    "Timeout": "Timeout",
48
 
    "LastCheckedOK": "Last Successful Check",
49
 
    "LastApprovalRequest": "Last Approval Request",
50
 
    "Created": "Created",
51
 
    "Interval": "Interval",
52
 
    "Host": "Host",
53
 
    "Fingerprint": "Fingerprint",
54
 
    "CheckerRunning": "Check Is Running",
55
 
    "LastEnabled": "Last Enabled",
56
 
    "ApprovalPending": "Approval Is Pending",
57
 
    "ApprovedByDefault": "Approved By Default",
58
 
    "ApprovalDelay": "Approval Delay",
59
 
    "ApprovalDuration": "Approval Duration",
60
 
    "Checker": "Checker",
61
 
    "ExtendedTimeout" : "Extended Timeout"
62
 
    }
63
 
defaultkeywords = ("Name", "Enabled", "Timeout", "LastCheckedOK")
64
 
domain = "se.recompile"
65
 
busname = domain + ".Mandos"
66
 
server_path = "/"
67
 
server_interface = domain + ".Mandos"
68
 
client_interface = domain + ".Mandos.Client"
69
 
version = "1.6.0"
70
 
 
71
 
def timedelta_to_milliseconds(td):
72
 
    """Convert a datetime.timedelta object to milliseconds"""
73
 
    return ((td.days * 24 * 60 * 60 * 1000)
74
 
            + (td.seconds * 1000)
75
 
            + (td.microseconds // 1000))
76
 
 
77
 
def milliseconds_to_string(ms):
78
 
    td = datetime.timedelta(0, 0, 0, ms)
79
 
    return ("{days}{hours:02}:{minutes:02}:{seconds:02}"
80
 
            .format(days = "{0}T".format(td.days) if td.days else "",
81
 
                    hours = td.seconds // 3600,
82
 
                    minutes = (td.seconds % 3600) // 60,
83
 
                    seconds = td.seconds % 60,
84
 
                    ))
85
 
 
86
 
 
87
 
def rfc3339_duration_to_delta(duration):
88
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
89
 
    
90
 
    >>> rfc3339_duration_to_delta("P7D")
91
 
    datetime.timedelta(7)
92
 
    >>> rfc3339_duration_to_delta("PT60S")
93
 
    datetime.timedelta(0, 60)
94
 
    >>> rfc3339_duration_to_delta("PT60M")
95
 
    datetime.timedelta(0, 3600)
96
 
    >>> rfc3339_duration_to_delta("PT24H")
97
 
    datetime.timedelta(1)
98
 
    >>> rfc3339_duration_to_delta("P1W")
99
 
    datetime.timedelta(7)
100
 
    >>> rfc3339_duration_to_delta("PT5M30S")
101
 
    datetime.timedelta(0, 330)
102
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
103
 
    datetime.timedelta(1, 200)
104
 
    """
105
 
    
106
 
    # Parsing an RFC 3339 duration with regular expressions is not
107
 
    # possible - there would have to be multiple places for the same
108
 
    # values, like seconds.  The current code, while more esoteric, is
109
 
    # cleaner without depending on a parsing library.  If Python had a
110
 
    # built-in library for parsing we would use it, but we'd like to
111
 
    # avoid excessive use of external libraries.
112
 
    
113
 
    # New type for defining tokens, syntax, and semantics all-in-one
114
 
    Token = collections.namedtuple("Token",
115
 
                                   ("regexp", # To match token; if
116
 
                                              # "value" is not None,
117
 
                                              # must have a "group"
118
 
                                              # containing digits
119
 
                                    "value",  # datetime.timedelta or
120
 
                                              # None
121
 
                                    "followers")) # Tokens valid after
122
 
                                                  # this token
123
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
124
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
125
 
    token_end = Token(re.compile(r"$"), None, frozenset())
126
 
    token_second = Token(re.compile(r"(\d+)S"),
127
 
                         datetime.timedelta(seconds=1),
128
 
                         frozenset((token_end,)))
129
 
    token_minute = Token(re.compile(r"(\d+)M"),
130
 
                         datetime.timedelta(minutes=1),
131
 
                         frozenset((token_second, token_end)))
132
 
    token_hour = Token(re.compile(r"(\d+)H"),
133
 
                       datetime.timedelta(hours=1),
134
 
                       frozenset((token_minute, token_end)))
135
 
    token_time = Token(re.compile(r"T"),
136
 
                       None,
137
 
                       frozenset((token_hour, token_minute,
138
 
                                  token_second)))
139
 
    token_day = Token(re.compile(r"(\d+)D"),
140
 
                      datetime.timedelta(days=1),
141
 
                      frozenset((token_time, token_end)))
142
 
    token_month = Token(re.compile(r"(\d+)M"),
143
 
                        datetime.timedelta(weeks=4),
144
 
                        frozenset((token_day, token_end)))
145
 
    token_year = Token(re.compile(r"(\d+)Y"),
146
 
                       datetime.timedelta(weeks=52),
147
 
                       frozenset((token_month, token_end)))
148
 
    token_week = Token(re.compile(r"(\d+)W"),
149
 
                       datetime.timedelta(weeks=1),
150
 
                       frozenset((token_end,)))
151
 
    token_duration = Token(re.compile(r"P"), None,
152
 
                           frozenset((token_year, token_month,
153
 
                                      token_day, token_time,
154
 
                                      token_week))),
155
 
    # Define starting values
156
 
    value = datetime.timedelta() # Value so far
157
 
    found_token = None
158
 
    followers = frozenset(token_duration,) # Following valid tokens
159
 
    s = duration                # String left to parse
160
 
    # Loop until end token is found
161
 
    while found_token is not token_end:
162
 
        # Search for any currently valid tokens
163
 
        for token in followers:
164
 
            match = token.regexp.match(s)
165
 
            if match is not None:
166
 
                # Token found
167
 
                if token.value is not None:
168
 
                    # Value found, parse digits
169
 
                    factor = int(match.group(1), 10)
170
 
                    # Add to value so far
171
 
                    value += factor * token.value
172
 
                # Strip token from string
173
 
                s = token.regexp.sub("", s, 1)
174
 
                # Go to found token
175
 
                found_token = token
176
 
                # Set valid next tokens
177
 
                followers = found_token.followers
178
 
                break
179
 
        else:
180
 
            # No currently valid tokens were found
181
 
            raise ValueError("Invalid RFC 3339 duration")
182
 
    # End token found
183
 
    return value
184
 
 
185
 
 
186
 
def string_to_delta(interval):
187
 
    """Parse a string and return a datetime.timedelta
188
 
    
189
 
    >>> string_to_delta("7d")
190
 
    datetime.timedelta(7)
191
 
    >>> string_to_delta("60s")
192
 
    datetime.timedelta(0, 60)
193
 
    >>> string_to_delta("60m")
194
 
    datetime.timedelta(0, 3600)
195
 
    >>> string_to_delta("24h")
196
 
    datetime.timedelta(1)
197
 
    >>> string_to_delta("1w")
198
 
    datetime.timedelta(7)
199
 
    >>> string_to_delta("5m 30s")
200
 
    datetime.timedelta(0, 330)
201
 
    """
202
 
    
203
 
    try:
204
 
        return rfc3339_duration_to_delta(interval)
205
 
    except ValueError:
206
 
        pass
207
 
    
208
 
    value = datetime.timedelta(0)
209
 
    regexp = re.compile(r"(\d+)([dsmhw]?)")
210
 
    
211
 
    for num, suffix in regexp.findall(interval):
212
 
        if suffix == "d":
213
 
            value += datetime.timedelta(int(num))
214
 
        elif suffix == "s":
215
 
            value += datetime.timedelta(0, int(num))
216
 
        elif suffix == "m":
217
 
            value += datetime.timedelta(0, 0, 0, 0, int(num))
218
 
        elif suffix == "h":
219
 
            value += datetime.timedelta(0, 0, 0, 0, 0, int(num))
220
 
        elif suffix == "w":
221
 
            value += datetime.timedelta(0, 0, 0, 0, 0, 0, int(num))
222
 
        elif suffix == "":
223
 
            value += datetime.timedelta(0, 0, 0, int(num))
224
 
    return value
225
 
 
226
 
def print_clients(clients, keywords):
227
 
    def valuetostring(value, keyword):
228
 
        if type(value) is dbus.Boolean:
229
 
            return "Yes" if value else "No"
230
 
        if keyword in ("Timeout", "Interval", "ApprovalDelay",
231
 
                       "ApprovalDuration", "ExtendedTimeout"):
232
 
            return milliseconds_to_string(value)
233
 
        return unicode(value)
234
 
    
235
 
    # Create format string to print table rows
236
 
    format_string = " ".join("{{{key}:{width}}}".format(
237
 
            width = max(len(tablewords[key]),
238
 
                        max(len(valuetostring(client[key],
239
 
                                              key))
240
 
                            for client in
241
 
                            clients)),
242
 
            key = key) for key in keywords)
243
 
    # Print header line
244
 
    print(format_string.format(**tablewords))
245
 
    for client in clients:
246
 
        print(format_string.format(**dict((key,
247
 
                                           valuetostring(client[key],
248
 
                                                         key))
249
 
                                          for key in keywords)))
250
 
 
251
 
def has_actions(options):
252
 
    return any((options.enable,
253
 
                options.disable,
254
 
                options.bump_timeout,
255
 
                options.start_checker,
256
 
                options.stop_checker,
257
 
                options.is_enabled,
258
 
                options.remove,
259
 
                options.checker is not None,
260
 
                options.timeout is not None,
261
 
                options.extended_timeout is not None,
262
 
                options.interval is not None,
263
 
                options.approved_by_default is not None,
264
 
                options.approval_delay is not None,
265
 
                options.approval_duration is not None,
266
 
                options.host is not None,
267
 
                options.secret is not None,
268
 
                options.approve,
269
 
                options.deny))
270
 
 
271
 
def main():
272
 
    parser = argparse.ArgumentParser()
273
 
    parser.add_argument("--version", action="version",
274
 
                        version = "%(prog)s {0}".format(version),
275
 
                        help="show version number and exit")
276
 
    parser.add_argument("-a", "--all", action="store_true",
277
 
                        help="Select all clients")
278
 
    parser.add_argument("-v", "--verbose", action="store_true",
279
 
                        help="Print all fields")
280
 
    parser.add_argument("-e", "--enable", action="store_true",
281
 
                        help="Enable client")
282
 
    parser.add_argument("-d", "--disable", action="store_true",
283
 
                        help="disable client")
284
 
    parser.add_argument("-b", "--bump-timeout", action="store_true",
285
 
                        help="Bump timeout for client")
286
 
    parser.add_argument("--start-checker", action="store_true",
287
 
                        help="Start checker for client")
288
 
    parser.add_argument("--stop-checker", action="store_true",
289
 
                        help="Stop checker for client")
290
 
    parser.add_argument("-V", "--is-enabled", action="store_true",
291
 
                        help="Check if client is enabled")
292
 
    parser.add_argument("-r", "--remove", action="store_true",
293
 
                        help="Remove client")
294
 
    parser.add_argument("-c", "--checker",
295
 
                        help="Set checker command for client")
296
 
    parser.add_argument("-t", "--timeout",
297
 
                        help="Set timeout for client")
298
 
    parser.add_argument("--extended-timeout",
299
 
                        help="Set extended timeout for client")
300
 
    parser.add_argument("-i", "--interval",
301
 
                        help="Set checker interval for client")
302
 
    parser.add_argument("--approve-by-default", action="store_true",
303
 
                        default=None, dest="approved_by_default",
304
 
                        help="Set client to be approved by default")
305
 
    parser.add_argument("--deny-by-default", action="store_false",
306
 
                        dest="approved_by_default",
307
 
                        help="Set client to be denied by default")
308
 
    parser.add_argument("--approval-delay",
309
 
                        help="Set delay before client approve/deny")
310
 
    parser.add_argument("--approval-duration",
311
 
                        help="Set duration of one client approval")
312
 
    parser.add_argument("-H", "--host", help="Set host for client")
313
 
    parser.add_argument("-s", "--secret", type=file,
314
 
                        help="Set password blob (file) for client")
315
 
    parser.add_argument("-A", "--approve", action="store_true",
316
 
                        help="Approve any current client request")
317
 
    parser.add_argument("-D", "--deny", action="store_true",
318
 
                        help="Deny any current client request")
319
 
    parser.add_argument("--check", action="store_true",
320
 
                        help="Run self-test")
321
 
    parser.add_argument("client", nargs="*", help="Client name")
322
 
    options = parser.parse_args()
323
 
    
324
 
    if has_actions(options) and not (options.client or options.all):
325
 
        parser.error("Options require clients names or --all.")
326
 
    if options.verbose and has_actions(options):
327
 
        parser.error("--verbose can only be used alone or with"
328
 
                     " --all.")
329
 
    if options.all and not has_actions(options):
330
 
        parser.error("--all requires an action.")
331
 
 
332
 
    if options.check:
333
 
        fail_count, test_count = doctest.testmod()
334
 
        sys.exit(0 if fail_count == 0 else 1)
335
 
    
336
 
    try:
337
 
        bus = dbus.SystemBus()
338
 
        mandos_dbus_objc = bus.get_object(busname, server_path)
339
 
    except dbus.exceptions.DBusException:
340
 
        print("Could not connect to Mandos server",
341
 
              file=sys.stderr)
342
 
        sys.exit(1)
343
 
    
344
 
    mandos_serv = dbus.Interface(mandos_dbus_objc,
345
 
                                 dbus_interface = server_interface)
346
 
    
347
 
    #block stderr since dbus library prints to stderr
348
 
    null = os.open(os.path.devnull, os.O_RDWR)
349
 
    stderrcopy = os.dup(sys.stderr.fileno())
350
 
    os.dup2(null, sys.stderr.fileno())
351
 
    os.close(null)
352
 
    try:
353
 
        try:
354
 
            mandos_clients = mandos_serv.GetAllClientsWithProperties()
355
 
        finally:
356
 
            #restore stderr
357
 
            os.dup2(stderrcopy, sys.stderr.fileno())
358
 
            os.close(stderrcopy)
359
 
    except dbus.exceptions.DBusException:
360
 
        print("Access denied: Accessing mandos server through dbus.",
361
 
              file=sys.stderr)
362
 
        sys.exit(1)
363
 
    
364
 
    # Compile dict of (clients: properties) to process
365
 
    clients={}
366
 
    
367
 
    if options.all or not options.client:
368
 
        clients = dict((bus.get_object(busname, path), properties)
369
 
                       for path, properties in
370
 
                       mandos_clients.iteritems())
371
 
    else:
372
 
        for name in options.client:
373
 
            for path, client in mandos_clients.iteritems():
374
 
                if client["Name"] == name:
375
 
                    client_objc = bus.get_object(busname, path)
376
 
                    clients[client_objc] = client
377
 
                    break
378
 
            else:
379
 
                print("Client not found on server: {0!r}"
380
 
                      .format(name), file=sys.stderr)
381
 
                sys.exit(1)
382
 
    
383
 
    if not has_actions(options) and clients:
384
 
        if options.verbose:
385
 
            keywords = ("Name", "Enabled", "Timeout",
386
 
                        "LastCheckedOK", "Created", "Interval",
387
 
                        "Host", "Fingerprint", "CheckerRunning",
388
 
                        "LastEnabled", "ApprovalPending",
389
 
                        "ApprovedByDefault",
390
 
                        "LastApprovalRequest", "ApprovalDelay",
391
 
                        "ApprovalDuration", "Checker",
392
 
                        "ExtendedTimeout")
393
 
        else:
394
 
            keywords = defaultkeywords
395
 
        
396
 
        print_clients(clients.values(), keywords)
397
 
    else:
398
 
        # Process each client in the list by all selected options
399
 
        for client in clients:
400
 
            def set_client_prop(prop, value):
401
 
                """Set a Client D-Bus property"""
402
 
                client.Set(client_interface, prop, value,
403
 
                           dbus_interface=dbus.PROPERTIES_IFACE)
404
 
            def set_client_prop_ms(prop, value):
405
 
                """Set a Client D-Bus property, converted
406
 
                from a string to milliseconds."""
407
 
                set_client_prop(prop,
408
 
                                timedelta_to_milliseconds
409
 
                                (string_to_delta(value)))
410
 
            if options.remove:
411
 
                mandos_serv.RemoveClient(client.__dbus_object_path__)
412
 
            if options.enable:
413
 
                set_client_prop("Enabled", dbus.Boolean(True))
414
 
            if options.disable:
415
 
                set_client_prop("Enabled", dbus.Boolean(False))
416
 
            if options.bump_timeout:
417
 
                set_client_prop("LastCheckedOK", "")
418
 
            if options.start_checker:
419
 
                set_client_prop("CheckerRunning", dbus.Boolean(True))
420
 
            if options.stop_checker:
421
 
                set_client_prop("CheckerRunning", dbus.Boolean(False))
422
 
            if options.is_enabled:
423
 
                sys.exit(0 if client.Get(client_interface,
424
 
                                         "Enabled",
425
 
                                         dbus_interface=
426
 
                                         dbus.PROPERTIES_IFACE)
427
 
                         else 1)
428
 
            if options.checker is not None:
429
 
                set_client_prop("Checker", options.checker)
430
 
            if options.host is not None:
431
 
                set_client_prop("Host", options.host)
432
 
            if options.interval is not None:
433
 
                set_client_prop_ms("Interval", options.interval)
434
 
            if options.approval_delay is not None:
435
 
                set_client_prop_ms("ApprovalDelay",
436
 
                                   options.approval_delay)
437
 
            if options.approval_duration is not None:
438
 
                set_client_prop_ms("ApprovalDuration",
439
 
                                   options.approval_duration)
440
 
            if options.timeout is not None:
441
 
                set_client_prop_ms("Timeout", options.timeout)
442
 
            if options.extended_timeout is not None:
443
 
                set_client_prop_ms("ExtendedTimeout",
444
 
                                   options.extended_timeout)
445
 
            if options.secret is not None:
446
 
                set_client_prop("Secret",
447
 
                                dbus.ByteArray(options.secret.read()))
448
 
            if options.approved_by_default is not None:
449
 
                set_client_prop("ApprovedByDefault",
450
 
                                dbus.Boolean(options
451
 
                                             .approved_by_default))
452
 
            if options.approve:
453
 
                client.Approve(dbus.Boolean(True),
454
 
                               dbus_interface=client_interface)
455
 
            elif options.deny:
456
 
                client.Approve(dbus.Boolean(False),
457
 
                               dbus_interface=client_interface)
458
 
 
459
 
if __name__ == "__main__":
460
 
    main()