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Added configuration files support for mandos-client
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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 © 2008-2017 Teddy Hogeborn
7
 
# Copyright © 2008-2017 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
 
try:
30
 
    from future_builtins import *
31
 
except ImportError:
32
 
    pass
33
 
 
34
 
import sys
35
 
import argparse
36
 
import locale
37
 
import datetime
38
 
import re
39
 
import os
40
 
import collections
41
 
import json
42
 
 
43
 
import dbus
44
 
 
45
 
if sys.version_info.major == 2:
46
 
    str = unicode
47
 
 
48
 
locale.setlocale(locale.LC_ALL, "")
49
 
 
50
 
tablewords = {
51
 
    "Name": "Name",
52
 
    "Enabled": "Enabled",
53
 
    "Timeout": "Timeout",
54
 
    "LastCheckedOK": "Last Successful Check",
55
 
    "LastApprovalRequest": "Last Approval Request",
56
 
    "Created": "Created",
57
 
    "Interval": "Interval",
58
 
    "Host": "Host",
59
 
    "Fingerprint": "Fingerprint",
60
 
    "CheckerRunning": "Check Is Running",
61
 
    "LastEnabled": "Last Enabled",
62
 
    "ApprovalPending": "Approval Is Pending",
63
 
    "ApprovedByDefault": "Approved By Default",
64
 
    "ApprovalDelay": "Approval Delay",
65
 
    "ApprovalDuration": "Approval Duration",
66
 
    "Checker": "Checker",
67
 
    "ExtendedTimeout": "Extended Timeout",
68
 
    "Expires": "Expires",
69
 
    "LastCheckerStatus": "Last Checker Status",
70
 
}
71
 
defaultkeywords = ("Name", "Enabled", "Timeout", "LastCheckedOK")
72
 
domain = "se.recompile"
73
 
busname = domain + ".Mandos"
74
 
server_path = "/"
75
 
server_interface = domain + ".Mandos"
76
 
client_interface = domain + ".Mandos.Client"
77
 
version = "1.7.15"
78
 
 
79
 
 
80
 
try:
81
 
    dbus.OBJECT_MANAGER_IFACE
82
 
except AttributeError:
83
 
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
84
 
 
85
 
 
86
 
def milliseconds_to_string(ms):
87
 
    td = datetime.timedelta(0, 0, 0, ms)
88
 
    return ("{days}{hours:02}:{minutes:02}:{seconds:02}"
89
 
            .format(days="{}T".format(td.days) if td.days else "",
90
 
                    hours=td.seconds // 3600,
91
 
                    minutes=(td.seconds % 3600) // 60,
92
 
                    seconds=td.seconds % 60))
93
 
 
94
 
 
95
 
def rfc3339_duration_to_delta(duration):
96
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
97
 
 
98
 
    >>> rfc3339_duration_to_delta("P7D")
99
 
    datetime.timedelta(7)
100
 
    >>> rfc3339_duration_to_delta("PT60S")
101
 
    datetime.timedelta(0, 60)
102
 
    >>> rfc3339_duration_to_delta("PT60M")
103
 
    datetime.timedelta(0, 3600)
104
 
    >>> rfc3339_duration_to_delta("PT24H")
105
 
    datetime.timedelta(1)
106
 
    >>> rfc3339_duration_to_delta("P1W")
107
 
    datetime.timedelta(7)
108
 
    >>> rfc3339_duration_to_delta("PT5M30S")
109
 
    datetime.timedelta(0, 330)
110
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
111
 
    datetime.timedelta(1, 200)
112
 
    """
113
 
 
114
 
    # Parsing an RFC 3339 duration with regular expressions is not
115
 
    # possible - there would have to be multiple places for the same
116
 
    # values, like seconds.  The current code, while more esoteric, is
117
 
    # cleaner without depending on a parsing library.  If Python had a
118
 
    # built-in library for parsing we would use it, but we'd like to
119
 
    # avoid excessive use of external libraries.
120
 
 
121
 
    # New type for defining tokens, syntax, and semantics all-in-one
122
 
    Token = collections.namedtuple("Token", (
123
 
        "regexp",  # To match token; if "value" is not None, must have
124
 
                   # a "group" containing digits
125
 
        "value",   # datetime.timedelta or None
126
 
        "followers"))           # Tokens valid after this token
127
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
128
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
129
 
    token_end = Token(re.compile(r"$"), None, frozenset())
130
 
    token_second = Token(re.compile(r"(\d+)S"),
131
 
                         datetime.timedelta(seconds=1),
132
 
                         frozenset((token_end, )))
133
 
    token_minute = Token(re.compile(r"(\d+)M"),
134
 
                         datetime.timedelta(minutes=1),
135
 
                         frozenset((token_second, token_end)))
136
 
    token_hour = Token(re.compile(r"(\d+)H"),
137
 
                       datetime.timedelta(hours=1),
138
 
                       frozenset((token_minute, token_end)))
139
 
    token_time = Token(re.compile(r"T"),
140
 
                       None,
141
 
                       frozenset((token_hour, token_minute,
142
 
                                  token_second)))
143
 
    token_day = Token(re.compile(r"(\d+)D"),
144
 
                      datetime.timedelta(days=1),
145
 
                      frozenset((token_time, token_end)))
146
 
    token_month = Token(re.compile(r"(\d+)M"),
147
 
                        datetime.timedelta(weeks=4),
148
 
                        frozenset((token_day, token_end)))
149
 
    token_year = Token(re.compile(r"(\d+)Y"),
150
 
                       datetime.timedelta(weeks=52),
151
 
                       frozenset((token_month, token_end)))
152
 
    token_week = Token(re.compile(r"(\d+)W"),
153
 
                       datetime.timedelta(weeks=1),
154
 
                       frozenset((token_end, )))
155
 
    token_duration = Token(re.compile(r"P"), None,
156
 
                           frozenset((token_year, token_month,
157
 
                                      token_day, token_time,
158
 
                                      token_week)))
159
 
    # Define starting values:
160
 
    # Value so far
161
 
    value = datetime.timedelta()
162
 
    found_token = None
163
 
    # Following valid tokens
164
 
    followers = frozenset((token_duration, ))
165
 
    # String left to parse
166
 
    s = duration
167
 
    # Loop until end token is found
168
 
    while found_token is not token_end:
169
 
        # Search for any currently valid tokens
170
 
        for token in followers:
171
 
            match = token.regexp.match(s)
172
 
            if match is not None:
173
 
                # Token found
174
 
                if token.value is not None:
175
 
                    # Value found, parse digits
176
 
                    factor = int(match.group(1), 10)
177
 
                    # Add to value so far
178
 
                    value += factor * token.value
179
 
                # Strip token from string
180
 
                s = token.regexp.sub("", s, 1)
181
 
                # Go to found token
182
 
                found_token = token
183
 
                # Set valid next tokens
184
 
                followers = found_token.followers
185
 
                break
186
 
        else:
187
 
            # No currently valid tokens were found
188
 
            raise ValueError("Invalid RFC 3339 duration: {!r}"
189
 
                             .format(duration))
190
 
    # End token found
191
 
    return value
192
 
 
193
 
 
194
 
def string_to_delta(interval):
195
 
    """Parse a string and return a datetime.timedelta
196
 
 
197
 
    >>> string_to_delta('7d')
198
 
    datetime.timedelta(7)
199
 
    >>> string_to_delta('60s')
200
 
    datetime.timedelta(0, 60)
201
 
    >>> string_to_delta('60m')
202
 
    datetime.timedelta(0, 3600)
203
 
    >>> string_to_delta('24h')
204
 
    datetime.timedelta(1)
205
 
    >>> string_to_delta('1w')
206
 
    datetime.timedelta(7)
207
 
    >>> string_to_delta('5m 30s')
208
 
    datetime.timedelta(0, 330)
209
 
    """
210
 
 
211
 
    try:
212
 
        return rfc3339_duration_to_delta(interval)
213
 
    except ValueError:
214
 
        pass
215
 
 
216
 
    value = datetime.timedelta(0)
217
 
    regexp = re.compile(r"(\d+)([dsmhw]?)")
218
 
 
219
 
    for num, suffix in regexp.findall(interval):
220
 
        if suffix == "d":
221
 
            value += datetime.timedelta(int(num))
222
 
        elif suffix == "s":
223
 
            value += datetime.timedelta(0, int(num))
224
 
        elif suffix == "m":
225
 
            value += datetime.timedelta(0, 0, 0, 0, int(num))
226
 
        elif suffix == "h":
227
 
            value += datetime.timedelta(0, 0, 0, 0, 0, int(num))
228
 
        elif suffix == "w":
229
 
            value += datetime.timedelta(0, 0, 0, 0, 0, 0, int(num))
230
 
        elif suffix == "":
231
 
            value += datetime.timedelta(0, 0, 0, int(num))
232
 
    return value
233
 
 
234
 
 
235
 
def print_clients(clients, keywords):
236
 
    def valuetostring(value, keyword):
237
 
        if type(value) is dbus.Boolean:
238
 
            return "Yes" if value else "No"
239
 
        if keyword in ("Timeout", "Interval", "ApprovalDelay",
240
 
                       "ApprovalDuration", "ExtendedTimeout"):
241
 
            return milliseconds_to_string(value)
242
 
        return str(value)
243
 
 
244
 
    # Create format string to print table rows
245
 
    format_string = " ".join("{{{key}:{width}}}".format(
246
 
        width=max(len(tablewords[key]),
247
 
                  max(len(valuetostring(client[key], key))
248
 
                      for client in clients)),
249
 
        key=key)
250
 
                             for key in keywords)
251
 
    # Print header line
252
 
    print(format_string.format(**tablewords))
253
 
    for client in clients:
254
 
        print(format_string
255
 
              .format(**{key: valuetostring(client[key], key)
256
 
                         for key in keywords}))
257
 
 
258
 
 
259
 
def has_actions(options):
260
 
    return any((options.enable,
261
 
                options.disable,
262
 
                options.bump_timeout,
263
 
                options.start_checker,
264
 
                options.stop_checker,
265
 
                options.is_enabled,
266
 
                options.remove,
267
 
                options.checker is not None,
268
 
                options.timeout is not None,
269
 
                options.extended_timeout is not None,
270
 
                options.interval is not None,
271
 
                options.approved_by_default is not None,
272
 
                options.approval_delay is not None,
273
 
                options.approval_duration is not None,
274
 
                options.host is not None,
275
 
                options.secret is not None,
276
 
                options.approve,
277
 
                options.deny))
278
 
 
279
 
 
280
 
def main():
281
 
    parser = argparse.ArgumentParser()
282
 
    parser.add_argument("--version", action="version",
283
 
                        version="%(prog)s {}".format(version),
284
 
                        help="show version number and exit")
285
 
    parser.add_argument("-a", "--all", action="store_true",
286
 
                        help="Select all clients")
287
 
    parser.add_argument("-v", "--verbose", action="store_true",
288
 
                        help="Print all fields")
289
 
    parser.add_argument("-j", "--dump-json", action="store_true",
290
 
                        help="Dump client data in JSON format")
291
 
    parser.add_argument("-e", "--enable", action="store_true",
292
 
                        help="Enable client")
293
 
    parser.add_argument("-d", "--disable", action="store_true",
294
 
                        help="disable client")
295
 
    parser.add_argument("-b", "--bump-timeout", action="store_true",
296
 
                        help="Bump timeout for client")
297
 
    parser.add_argument("--start-checker", action="store_true",
298
 
                        help="Start checker for client")
299
 
    parser.add_argument("--stop-checker", action="store_true",
300
 
                        help="Stop checker for client")
301
 
    parser.add_argument("-V", "--is-enabled", action="store_true",
302
 
                        help="Check if client is enabled")
303
 
    parser.add_argument("-r", "--remove", action="store_true",
304
 
                        help="Remove client")
305
 
    parser.add_argument("-c", "--checker",
306
 
                        help="Set checker command for client")
307
 
    parser.add_argument("-t", "--timeout",
308
 
                        help="Set timeout for client")
309
 
    parser.add_argument("--extended-timeout",
310
 
                        help="Set extended timeout for client")
311
 
    parser.add_argument("-i", "--interval",
312
 
                        help="Set checker interval for client")
313
 
    parser.add_argument("--approve-by-default", action="store_true",
314
 
                        default=None, dest="approved_by_default",
315
 
                        help="Set client to be approved by default")
316
 
    parser.add_argument("--deny-by-default", action="store_false",
317
 
                        dest="approved_by_default",
318
 
                        help="Set client to be denied by default")
319
 
    parser.add_argument("--approval-delay",
320
 
                        help="Set delay before client approve/deny")
321
 
    parser.add_argument("--approval-duration",
322
 
                        help="Set duration of one client approval")
323
 
    parser.add_argument("-H", "--host", help="Set host for client")
324
 
    parser.add_argument("-s", "--secret",
325
 
                        type=argparse.FileType(mode="rb"),
326
 
                        help="Set password blob (file) for client")
327
 
    parser.add_argument("-A", "--approve", action="store_true",
328
 
                        help="Approve any current client request")
329
 
    parser.add_argument("-D", "--deny", action="store_true",
330
 
                        help="Deny any current client request")
331
 
    parser.add_argument("--check", action="store_true",
332
 
                        help="Run self-test")
333
 
    parser.add_argument("client", nargs="*", help="Client name")
334
 
    options = parser.parse_args()
335
 
 
336
 
    if has_actions(options) and not (options.client or options.all):
337
 
        parser.error("Options require clients names or --all.")
338
 
    if options.verbose and has_actions(options):
339
 
        parser.error("--verbose can only be used alone.")
340
 
    if options.dump_json and (options.verbose
341
 
                              or has_actions(options)):
342
 
        parser.error("--dump-json can only be used alone.")
343
 
    if options.all and not has_actions(options):
344
 
        parser.error("--all requires an action.")
345
 
 
346
 
    if options.check:
347
 
        import doctest
348
 
        fail_count, test_count = doctest.testmod()
349
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
350
 
 
351
 
    try:
352
 
        bus = dbus.SystemBus()
353
 
        mandos_dbus_objc = bus.get_object(busname, server_path)
354
 
    except dbus.exceptions.DBusException:
355
 
        print("Could not connect to Mandos server", file=sys.stderr)
356
 
        sys.exit(1)
357
 
 
358
 
    mandos_serv = dbus.Interface(mandos_dbus_objc,
359
 
                                 dbus_interface=server_interface)
360
 
    mandos_serv_object_manager = dbus.Interface(
361
 
        mandos_dbus_objc, dbus_interface=dbus.OBJECT_MANAGER_IFACE)
362
 
 
363
 
    # block stderr since dbus library prints to stderr
364
 
    null = os.open(os.path.devnull, os.O_RDWR)
365
 
    stderrcopy = os.dup(sys.stderr.fileno())
366
 
    os.dup2(null, sys.stderr.fileno())
367
 
    os.close(null)
368
 
    try:
369
 
        try:
370
 
            mandos_clients = {path: ifs_and_props[client_interface]
371
 
                              for path, ifs_and_props in
372
 
                              mandos_serv_object_manager
373
 
                              .GetManagedObjects().items()
374
 
                              if client_interface in ifs_and_props}
375
 
        finally:
376
 
            # restore stderr
377
 
            os.dup2(stderrcopy, sys.stderr.fileno())
378
 
            os.close(stderrcopy)
379
 
    except dbus.exceptions.DBusException as e:
380
 
        print("Access denied: "
381
 
              "Accessing mandos server through D-Bus: {}".format(e),
382
 
              file=sys.stderr)
383
 
        sys.exit(1)
384
 
 
385
 
    # Compile dict of (clients: properties) to process
386
 
    clients = {}
387
 
 
388
 
    if options.all or not options.client:
389
 
        clients = {bus.get_object(busname, path): properties
390
 
                   for path, properties in mandos_clients.items()}
391
 
    else:
392
 
        for name in options.client:
393
 
            for path, client in mandos_clients.items():
394
 
                if client["Name"] == name:
395
 
                    client_objc = bus.get_object(busname, path)
396
 
                    clients[client_objc] = client
397
 
                    break
398
 
            else:
399
 
                print("Client not found on server: {!r}"
400
 
                      .format(name), file=sys.stderr)
401
 
                sys.exit(1)
402
 
 
403
 
    if not has_actions(options) and clients:
404
 
        if options.verbose or options.dump_json:
405
 
            keywords = ("Name", "Enabled", "Timeout", "LastCheckedOK",
406
 
                        "Created", "Interval", "Host", "Fingerprint",
407
 
                        "CheckerRunning", "LastEnabled",
408
 
                        "ApprovalPending", "ApprovedByDefault",
409
 
                        "LastApprovalRequest", "ApprovalDelay",
410
 
                        "ApprovalDuration", "Checker",
411
 
                        "ExtendedTimeout", "Expires",
412
 
                        "LastCheckerStatus")
413
 
        else:
414
 
            keywords = defaultkeywords
415
 
 
416
 
        if options.dump_json:
417
 
            json.dump({client["Name"]: {key:
418
 
                                        bool(client[key])
419
 
                                        if isinstance(client[key],
420
 
                                                      dbus.Boolean)
421
 
                                        else client[key]
422
 
                                        for key in keywords}
423
 
                       for client in clients.values()},
424
 
                      fp=sys.stdout, indent=4,
425
 
                      separators=(',', ': '))
426
 
            print()
427
 
        else:
428
 
            print_clients(clients.values(), keywords)
429
 
    else:
430
 
        # Process each client in the list by all selected options
431
 
        for client in clients:
432
 
 
433
 
            def set_client_prop(prop, value):
434
 
                """Set a Client D-Bus property"""
435
 
                client.Set(client_interface, prop, value,
436
 
                           dbus_interface=dbus.PROPERTIES_IFACE)
437
 
 
438
 
            def set_client_prop_ms(prop, value):
439
 
                """Set a Client D-Bus property, converted
440
 
                from a string to milliseconds."""
441
 
                set_client_prop(prop,
442
 
                                string_to_delta(value).total_seconds()
443
 
                                * 1000)
444
 
 
445
 
            if options.remove:
446
 
                mandos_serv.RemoveClient(client.__dbus_object_path__)
447
 
            if options.enable:
448
 
                set_client_prop("Enabled", dbus.Boolean(True))
449
 
            if options.disable:
450
 
                set_client_prop("Enabled", dbus.Boolean(False))
451
 
            if options.bump_timeout:
452
 
                set_client_prop("LastCheckedOK", "")
453
 
            if options.start_checker:
454
 
                set_client_prop("CheckerRunning", dbus.Boolean(True))
455
 
            if options.stop_checker:
456
 
                set_client_prop("CheckerRunning", dbus.Boolean(False))
457
 
            if options.is_enabled:
458
 
                if client.Get(client_interface, "Enabled",
459
 
                              dbus_interface=dbus.PROPERTIES_IFACE):
460
 
                    sys.exit(0)
461
 
                else:
462
 
                    sys.exit(1)
463
 
            if options.checker is not None:
464
 
                set_client_prop("Checker", options.checker)
465
 
            if options.host is not None:
466
 
                set_client_prop("Host", options.host)
467
 
            if options.interval is not None:
468
 
                set_client_prop_ms("Interval", options.interval)
469
 
            if options.approval_delay is not None:
470
 
                set_client_prop_ms("ApprovalDelay",
471
 
                                   options.approval_delay)
472
 
            if options.approval_duration is not None:
473
 
                set_client_prop_ms("ApprovalDuration",
474
 
                                   options.approval_duration)
475
 
            if options.timeout is not None:
476
 
                set_client_prop_ms("Timeout", options.timeout)
477
 
            if options.extended_timeout is not None:
478
 
                set_client_prop_ms("ExtendedTimeout",
479
 
                                   options.extended_timeout)
480
 
            if options.secret is not None:
481
 
                set_client_prop("Secret",
482
 
                                dbus.ByteArray(options.secret.read()))
483
 
            if options.approved_by_default is not None:
484
 
                set_client_prop("ApprovedByDefault",
485
 
                                dbus.Boolean(options
486
 
                                             .approved_by_default))
487
 
            if options.approve:
488
 
                client.Approve(dbus.Boolean(True),
489
 
                               dbus_interface=client_interface)
490
 
            elif options.deny:
491
 
                client.Approve(dbus.Boolean(False),
492
 
                               dbus_interface=client_interface)
493
 
 
494
 
 
495
 
if __name__ == "__main__":
496
 
    main()