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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 © 2008-2018 Teddy Hogeborn
7
 
# Copyright © 2008-2018 Björn Påhlsson
8
 
#
9
 
# This file is part of Mandos.
10
 
#
11
 
# Mandos is free software: you can redistribute it and/or modify it
12
 
# under the terms of the GNU General Public License as published by
13
 
# the Free Software Foundation, either version 3 of the License, or
14
 
# (at your option) any later version.
15
 
#
16
 
#     Mandos is distributed in the hope that it will be useful, but
17
 
#     WITHOUT ANY WARRANTY; without even the implied warranty of
18
 
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19
 
#     GNU General Public License for more details.
20
 
#
21
 
# You should have received a copy of the GNU General Public License
22
 
# along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
23
 
#
24
 
# Contact the authors at <mandos@recompile.se>.
25
 
#
26
 
 
27
 
from __future__ import (division, absolute_import, print_function,
28
 
                        unicode_literals)
29
 
 
30
 
try:
31
 
    from future_builtins import *
32
 
except ImportError:
33
 
    pass
34
 
 
35
 
import sys
36
 
import argparse
37
 
import locale
38
 
import datetime
39
 
import re
40
 
import os
41
 
import collections
42
 
import json
43
 
 
44
 
import dbus
45
 
 
46
 
if sys.version_info.major == 2:
47
 
    str = unicode
48
 
 
49
 
locale.setlocale(locale.LC_ALL, "")
50
 
 
51
 
tablewords = {
52
 
    "Name": "Name",
53
 
    "Enabled": "Enabled",
54
 
    "Timeout": "Timeout",
55
 
    "LastCheckedOK": "Last Successful Check",
56
 
    "LastApprovalRequest": "Last Approval Request",
57
 
    "Created": "Created",
58
 
    "Interval": "Interval",
59
 
    "Host": "Host",
60
 
    "Fingerprint": "Fingerprint",
61
 
    "CheckerRunning": "Check Is Running",
62
 
    "LastEnabled": "Last Enabled",
63
 
    "ApprovalPending": "Approval Is Pending",
64
 
    "ApprovedByDefault": "Approved By Default",
65
 
    "ApprovalDelay": "Approval Delay",
66
 
    "ApprovalDuration": "Approval Duration",
67
 
    "Checker": "Checker",
68
 
    "ExtendedTimeout": "Extended Timeout",
69
 
    "Expires": "Expires",
70
 
    "LastCheckerStatus": "Last Checker Status",
71
 
}
72
 
defaultkeywords = ("Name", "Enabled", "Timeout", "LastCheckedOK")
73
 
domain = "se.recompile"
74
 
busname = domain + ".Mandos"
75
 
server_path = "/"
76
 
server_interface = domain + ".Mandos"
77
 
client_interface = domain + ".Mandos.Client"
78
 
version = "1.7.19"
79
 
 
80
 
 
81
 
try:
82
 
    dbus.OBJECT_MANAGER_IFACE
83
 
except AttributeError:
84
 
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
85
 
 
86
 
 
87
 
def milliseconds_to_string(ms):
88
 
    td = datetime.timedelta(0, 0, 0, ms)
89
 
    return ("{days}{hours:02}:{minutes:02}:{seconds:02}"
90
 
            .format(days="{}T".format(td.days) if td.days else "",
91
 
                    hours=td.seconds // 3600,
92
 
                    minutes=(td.seconds % 3600) // 60,
93
 
                    seconds=td.seconds % 60))
94
 
 
95
 
 
96
 
def rfc3339_duration_to_delta(duration):
97
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
98
 
 
99
 
    >>> rfc3339_duration_to_delta("P7D")
100
 
    datetime.timedelta(7)
101
 
    >>> rfc3339_duration_to_delta("PT60S")
102
 
    datetime.timedelta(0, 60)
103
 
    >>> rfc3339_duration_to_delta("PT60M")
104
 
    datetime.timedelta(0, 3600)
105
 
    >>> rfc3339_duration_to_delta("PT24H")
106
 
    datetime.timedelta(1)
107
 
    >>> rfc3339_duration_to_delta("P1W")
108
 
    datetime.timedelta(7)
109
 
    >>> rfc3339_duration_to_delta("PT5M30S")
110
 
    datetime.timedelta(0, 330)
111
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
112
 
    datetime.timedelta(1, 200)
113
 
    """
114
 
 
115
 
    # Parsing an RFC 3339 duration with regular expressions is not
116
 
    # possible - there would have to be multiple places for the same
117
 
    # values, like seconds.  The current code, while more esoteric, is
118
 
    # cleaner without depending on a parsing library.  If Python had a
119
 
    # built-in library for parsing we would use it, but we'd like to
120
 
    # avoid excessive use of external libraries.
121
 
 
122
 
    # New type for defining tokens, syntax, and semantics all-in-one
123
 
    Token = collections.namedtuple("Token", (
124
 
        "regexp",  # To match token; if "value" is not None, must have
125
 
                   # a "group" containing digits
126
 
        "value",   # datetime.timedelta or None
127
 
        "followers"))           # Tokens valid after this token
128
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
129
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
130
 
    token_end = Token(re.compile(r"$"), None, frozenset())
131
 
    token_second = Token(re.compile(r"(\d+)S"),
132
 
                         datetime.timedelta(seconds=1),
133
 
                         frozenset((token_end, )))
134
 
    token_minute = Token(re.compile(r"(\d+)M"),
135
 
                         datetime.timedelta(minutes=1),
136
 
                         frozenset((token_second, token_end)))
137
 
    token_hour = Token(re.compile(r"(\d+)H"),
138
 
                       datetime.timedelta(hours=1),
139
 
                       frozenset((token_minute, token_end)))
140
 
    token_time = Token(re.compile(r"T"),
141
 
                       None,
142
 
                       frozenset((token_hour, token_minute,
143
 
                                  token_second)))
144
 
    token_day = Token(re.compile(r"(\d+)D"),
145
 
                      datetime.timedelta(days=1),
146
 
                      frozenset((token_time, token_end)))
147
 
    token_month = Token(re.compile(r"(\d+)M"),
148
 
                        datetime.timedelta(weeks=4),
149
 
                        frozenset((token_day, token_end)))
150
 
    token_year = Token(re.compile(r"(\d+)Y"),
151
 
                       datetime.timedelta(weeks=52),
152
 
                       frozenset((token_month, token_end)))
153
 
    token_week = Token(re.compile(r"(\d+)W"),
154
 
                       datetime.timedelta(weeks=1),
155
 
                       frozenset((token_end, )))
156
 
    token_duration = Token(re.compile(r"P"), None,
157
 
                           frozenset((token_year, token_month,
158
 
                                      token_day, token_time,
159
 
                                      token_week)))
160
 
    # Define starting values:
161
 
    # Value so far
162
 
    value = datetime.timedelta()
163
 
    found_token = None
164
 
    # Following valid tokens
165
 
    followers = frozenset((token_duration, ))
166
 
    # String left to parse
167
 
    s = duration
168
 
    # Loop until end token is found
169
 
    while found_token is not token_end:
170
 
        # Search for any currently valid tokens
171
 
        for token in followers:
172
 
            match = token.regexp.match(s)
173
 
            if match is not None:
174
 
                # Token found
175
 
                if token.value is not None:
176
 
                    # Value found, parse digits
177
 
                    factor = int(match.group(1), 10)
178
 
                    # Add to value so far
179
 
                    value += factor * token.value
180
 
                # Strip token from string
181
 
                s = token.regexp.sub("", s, 1)
182
 
                # Go to found token
183
 
                found_token = token
184
 
                # Set valid next tokens
185
 
                followers = found_token.followers
186
 
                break
187
 
        else:
188
 
            # No currently valid tokens were found
189
 
            raise ValueError("Invalid RFC 3339 duration: {!r}"
190
 
                             .format(duration))
191
 
    # End token found
192
 
    return value
193
 
 
194
 
 
195
 
def string_to_delta(interval):
196
 
    """Parse a string and return a datetime.timedelta
197
 
 
198
 
    >>> string_to_delta('7d')
199
 
    datetime.timedelta(7)
200
 
    >>> string_to_delta('60s')
201
 
    datetime.timedelta(0, 60)
202
 
    >>> string_to_delta('60m')
203
 
    datetime.timedelta(0, 3600)
204
 
    >>> string_to_delta('24h')
205
 
    datetime.timedelta(1)
206
 
    >>> string_to_delta('1w')
207
 
    datetime.timedelta(7)
208
 
    >>> string_to_delta('5m 30s')
209
 
    datetime.timedelta(0, 330)
210
 
    """
211
 
 
212
 
    try:
213
 
        return rfc3339_duration_to_delta(interval)
214
 
    except ValueError:
215
 
        pass
216
 
 
217
 
    value = datetime.timedelta(0)
218
 
    regexp = re.compile(r"(\d+)([dsmhw]?)")
219
 
 
220
 
    for num, suffix in regexp.findall(interval):
221
 
        if suffix == "d":
222
 
            value += datetime.timedelta(int(num))
223
 
        elif suffix == "s":
224
 
            value += datetime.timedelta(0, int(num))
225
 
        elif suffix == "m":
226
 
            value += datetime.timedelta(0, 0, 0, 0, int(num))
227
 
        elif suffix == "h":
228
 
            value += datetime.timedelta(0, 0, 0, 0, 0, int(num))
229
 
        elif suffix == "w":
230
 
            value += datetime.timedelta(0, 0, 0, 0, 0, 0, int(num))
231
 
        elif suffix == "":
232
 
            value += datetime.timedelta(0, 0, 0, int(num))
233
 
    return value
234
 
 
235
 
 
236
 
def print_clients(clients, keywords):
237
 
    def valuetostring(value, keyword):
238
 
        if type(value) is dbus.Boolean:
239
 
            return "Yes" if value else "No"
240
 
        if keyword in ("Timeout", "Interval", "ApprovalDelay",
241
 
                       "ApprovalDuration", "ExtendedTimeout"):
242
 
            return milliseconds_to_string(value)
243
 
        return str(value)
244
 
 
245
 
    # Create format string to print table rows
246
 
    format_string = " ".join("{{{key}:{width}}}".format(
247
 
        width=max(len(tablewords[key]),
248
 
                  max(len(valuetostring(client[key], key))
249
 
                      for client in clients)),
250
 
        key=key)
251
 
                             for key in keywords)
252
 
    # Print header line
253
 
    print(format_string.format(**tablewords))
254
 
    for client in clients:
255
 
        print(format_string
256
 
              .format(**{key: valuetostring(client[key], key)
257
 
                         for key in keywords}))
258
 
 
259
 
 
260
 
def has_actions(options):
261
 
    return any((options.enable,
262
 
                options.disable,
263
 
                options.bump_timeout,
264
 
                options.start_checker,
265
 
                options.stop_checker,
266
 
                options.is_enabled,
267
 
                options.remove,
268
 
                options.checker is not None,
269
 
                options.timeout is not None,
270
 
                options.extended_timeout is not None,
271
 
                options.interval is not None,
272
 
                options.approved_by_default is not None,
273
 
                options.approval_delay is not None,
274
 
                options.approval_duration is not None,
275
 
                options.host is not None,
276
 
                options.secret is not None,
277
 
                options.approve,
278
 
                options.deny))
279
 
 
280
 
 
281
 
def main():
282
 
    parser = argparse.ArgumentParser()
283
 
    parser.add_argument("--version", action="version",
284
 
                        version="%(prog)s {}".format(version),
285
 
                        help="show version number and exit")
286
 
    parser.add_argument("-a", "--all", action="store_true",
287
 
                        help="Select all clients")
288
 
    parser.add_argument("-v", "--verbose", action="store_true",
289
 
                        help="Print all fields")
290
 
    parser.add_argument("-j", "--dump-json", action="store_true",
291
 
                        help="Dump client data in JSON format")
292
 
    parser.add_argument("-e", "--enable", action="store_true",
293
 
                        help="Enable client")
294
 
    parser.add_argument("-d", "--disable", action="store_true",
295
 
                        help="disable client")
296
 
    parser.add_argument("-b", "--bump-timeout", action="store_true",
297
 
                        help="Bump timeout for client")
298
 
    parser.add_argument("--start-checker", action="store_true",
299
 
                        help="Start checker for client")
300
 
    parser.add_argument("--stop-checker", action="store_true",
301
 
                        help="Stop checker for client")
302
 
    parser.add_argument("-V", "--is-enabled", action="store_true",
303
 
                        help="Check if client is enabled")
304
 
    parser.add_argument("-r", "--remove", action="store_true",
305
 
                        help="Remove client")
306
 
    parser.add_argument("-c", "--checker",
307
 
                        help="Set checker command for client")
308
 
    parser.add_argument("-t", "--timeout",
309
 
                        help="Set timeout for client")
310
 
    parser.add_argument("--extended-timeout",
311
 
                        help="Set extended timeout for client")
312
 
    parser.add_argument("-i", "--interval",
313
 
                        help="Set checker interval for client")
314
 
    parser.add_argument("--approve-by-default", action="store_true",
315
 
                        default=None, dest="approved_by_default",
316
 
                        help="Set client to be approved by default")
317
 
    parser.add_argument("--deny-by-default", action="store_false",
318
 
                        dest="approved_by_default",
319
 
                        help="Set client to be denied by default")
320
 
    parser.add_argument("--approval-delay",
321
 
                        help="Set delay before client approve/deny")
322
 
    parser.add_argument("--approval-duration",
323
 
                        help="Set duration of one client approval")
324
 
    parser.add_argument("-H", "--host", help="Set host for client")
325
 
    parser.add_argument("-s", "--secret",
326
 
                        type=argparse.FileType(mode="rb"),
327
 
                        help="Set password blob (file) for client")
328
 
    parser.add_argument("-A", "--approve", action="store_true",
329
 
                        help="Approve any current client request")
330
 
    parser.add_argument("-D", "--deny", action="store_true",
331
 
                        help="Deny any current client request")
332
 
    parser.add_argument("--check", action="store_true",
333
 
                        help="Run self-test")
334
 
    parser.add_argument("client", nargs="*", help="Client name")
335
 
    options = parser.parse_args()
336
 
 
337
 
    if has_actions(options) and not (options.client or options.all):
338
 
        parser.error("Options require clients names or --all.")
339
 
    if options.verbose and has_actions(options):
340
 
        parser.error("--verbose can only be used alone.")
341
 
    if options.dump_json and (options.verbose
342
 
                              or has_actions(options)):
343
 
        parser.error("--dump-json can only be used alone.")
344
 
    if options.all and not has_actions(options):
345
 
        parser.error("--all requires an action.")
346
 
 
347
 
    if options.check:
348
 
        import doctest
349
 
        fail_count, test_count = doctest.testmod()
350
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
351
 
 
352
 
    try:
353
 
        bus = dbus.SystemBus()
354
 
        mandos_dbus_objc = bus.get_object(busname, server_path)
355
 
    except dbus.exceptions.DBusException:
356
 
        print("Could not connect to Mandos server", file=sys.stderr)
357
 
        sys.exit(1)
358
 
 
359
 
    mandos_serv = dbus.Interface(mandos_dbus_objc,
360
 
                                 dbus_interface=server_interface)
361
 
    mandos_serv_object_manager = dbus.Interface(
362
 
        mandos_dbus_objc, dbus_interface=dbus.OBJECT_MANAGER_IFACE)
363
 
 
364
 
    # block stderr since dbus library prints to stderr
365
 
    null = os.open(os.path.devnull, os.O_RDWR)
366
 
    stderrcopy = os.dup(sys.stderr.fileno())
367
 
    os.dup2(null, sys.stderr.fileno())
368
 
    os.close(null)
369
 
    try:
370
 
        try:
371
 
            mandos_clients = {path: ifs_and_props[client_interface]
372
 
                              for path, ifs_and_props in
373
 
                              mandos_serv_object_manager
374
 
                              .GetManagedObjects().items()
375
 
                              if client_interface in ifs_and_props}
376
 
        finally:
377
 
            # restore stderr
378
 
            os.dup2(stderrcopy, sys.stderr.fileno())
379
 
            os.close(stderrcopy)
380
 
    except dbus.exceptions.DBusException as e:
381
 
        print("Access denied: "
382
 
              "Accessing mandos server through D-Bus: {}".format(e),
383
 
              file=sys.stderr)
384
 
        sys.exit(1)
385
 
 
386
 
    # Compile dict of (clients: properties) to process
387
 
    clients = {}
388
 
 
389
 
    if options.all or not options.client:
390
 
        clients = {bus.get_object(busname, path): properties
391
 
                   for path, properties in mandos_clients.items()}
392
 
    else:
393
 
        for name in options.client:
394
 
            for path, client in mandos_clients.items():
395
 
                if client["Name"] == name:
396
 
                    client_objc = bus.get_object(busname, path)
397
 
                    clients[client_objc] = client
398
 
                    break
399
 
            else:
400
 
                print("Client not found on server: {!r}"
401
 
                      .format(name), file=sys.stderr)
402
 
                sys.exit(1)
403
 
 
404
 
    if not has_actions(options) and clients:
405
 
        if options.verbose or options.dump_json:
406
 
            keywords = ("Name", "Enabled", "Timeout", "LastCheckedOK",
407
 
                        "Created", "Interval", "Host", "Fingerprint",
408
 
                        "CheckerRunning", "LastEnabled",
409
 
                        "ApprovalPending", "ApprovedByDefault",
410
 
                        "LastApprovalRequest", "ApprovalDelay",
411
 
                        "ApprovalDuration", "Checker",
412
 
                        "ExtendedTimeout", "Expires",
413
 
                        "LastCheckerStatus")
414
 
        else:
415
 
            keywords = defaultkeywords
416
 
 
417
 
        if options.dump_json:
418
 
            json.dump({client["Name"]: {key:
419
 
                                        bool(client[key])
420
 
                                        if isinstance(client[key],
421
 
                                                      dbus.Boolean)
422
 
                                        else client[key]
423
 
                                        for key in keywords}
424
 
                       for client in clients.values()},
425
 
                      fp=sys.stdout, indent=4,
426
 
                      separators=(',', ': '))
427
 
            print()
428
 
        else:
429
 
            print_clients(clients.values(), keywords)
430
 
    else:
431
 
        # Process each client in the list by all selected options
432
 
        for client in clients:
433
 
 
434
 
            def set_client_prop(prop, value):
435
 
                """Set a Client D-Bus property"""
436
 
                client.Set(client_interface, prop, value,
437
 
                           dbus_interface=dbus.PROPERTIES_IFACE)
438
 
 
439
 
            def set_client_prop_ms(prop, value):
440
 
                """Set a Client D-Bus property, converted
441
 
                from a string to milliseconds."""
442
 
                set_client_prop(prop,
443
 
                                string_to_delta(value).total_seconds()
444
 
                                * 1000)
445
 
 
446
 
            if options.remove:
447
 
                mandos_serv.RemoveClient(client.__dbus_object_path__)
448
 
            if options.enable:
449
 
                set_client_prop("Enabled", dbus.Boolean(True))
450
 
            if options.disable:
451
 
                set_client_prop("Enabled", dbus.Boolean(False))
452
 
            if options.bump_timeout:
453
 
                set_client_prop("LastCheckedOK", "")
454
 
            if options.start_checker:
455
 
                set_client_prop("CheckerRunning", dbus.Boolean(True))
456
 
            if options.stop_checker:
457
 
                set_client_prop("CheckerRunning", dbus.Boolean(False))
458
 
            if options.is_enabled:
459
 
                if client.Get(client_interface, "Enabled",
460
 
                              dbus_interface=dbus.PROPERTIES_IFACE):
461
 
                    sys.exit(0)
462
 
                else:
463
 
                    sys.exit(1)
464
 
            if options.checker is not None:
465
 
                set_client_prop("Checker", options.checker)
466
 
            if options.host is not None:
467
 
                set_client_prop("Host", options.host)
468
 
            if options.interval is not None:
469
 
                set_client_prop_ms("Interval", options.interval)
470
 
            if options.approval_delay is not None:
471
 
                set_client_prop_ms("ApprovalDelay",
472
 
                                   options.approval_delay)
473
 
            if options.approval_duration is not None:
474
 
                set_client_prop_ms("ApprovalDuration",
475
 
                                   options.approval_duration)
476
 
            if options.timeout is not None:
477
 
                set_client_prop_ms("Timeout", options.timeout)
478
 
            if options.extended_timeout is not None:
479
 
                set_client_prop_ms("ExtendedTimeout",
480
 
                                   options.extended_timeout)
481
 
            if options.secret is not None:
482
 
                set_client_prop("Secret",
483
 
                                dbus.ByteArray(options.secret.read()))
484
 
            if options.approved_by_default is not None:
485
 
                set_client_prop("ApprovedByDefault",
486
 
                                dbus.Boolean(options
487
 
                                             .approved_by_default))
488
 
            if options.approve:
489
 
                client.Approve(dbus.Boolean(True),
490
 
                               dbus_interface=client_interface)
491
 
            elif options.deny:
492
 
                client.Approve(dbus.Boolean(False),
493
 
                               dbus_interface=client_interface)
494
 
 
495
 
 
496
 
if __name__ == "__main__":
497
 
    main()