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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 © 2008-2014 Teddy Hogeborn
7
 
# Copyright © 2008-2014 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 doctest
42
 
 
43
 
import dbus
44
 
 
45
 
if sys.version_info[0] == 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
 
    }
69
 
defaultkeywords = ("Name", "Enabled", "Timeout", "LastCheckedOK")
70
 
domain = "se.recompile"
71
 
busname = domain + ".Mandos"
72
 
server_path = "/"
73
 
server_interface = domain + ".Mandos"
74
 
client_interface = domain + ".Mandos.Client"
75
 
version = "1.6.7"
76
 
 
77
 
def timedelta_to_milliseconds(td):
78
 
    """Convert a datetime.timedelta object to milliseconds"""
79
 
    return ((td.days * 24 * 60 * 60 * 1000)
80
 
            + (td.seconds * 1000)
81
 
            + (td.microseconds // 1000))
82
 
 
83
 
def milliseconds_to_string(ms):
84
 
    td = datetime.timedelta(0, 0, 0, ms)
85
 
    return ("{days}{hours:02}:{minutes:02}:{seconds:02}"
86
 
            .format(days = "{0}T".format(td.days) if td.days else "",
87
 
                    hours = td.seconds // 3600,
88
 
                    minutes = (td.seconds % 3600) // 60,
89
 
                    seconds = td.seconds % 60,
90
 
                    ))
91
 
 
92
 
 
93
 
def rfc3339_duration_to_delta(duration):
94
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
95
 
    
96
 
    >>> rfc3339_duration_to_delta("P7D")
97
 
    datetime.timedelta(7)
98
 
    >>> rfc3339_duration_to_delta("PT60S")
99
 
    datetime.timedelta(0, 60)
100
 
    >>> rfc3339_duration_to_delta("PT60M")
101
 
    datetime.timedelta(0, 3600)
102
 
    >>> rfc3339_duration_to_delta("PT24H")
103
 
    datetime.timedelta(1)
104
 
    >>> rfc3339_duration_to_delta("P1W")
105
 
    datetime.timedelta(7)
106
 
    >>> rfc3339_duration_to_delta("PT5M30S")
107
 
    datetime.timedelta(0, 330)
108
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
109
 
    datetime.timedelta(1, 200)
110
 
    """
111
 
    
112
 
    # Parsing an RFC 3339 duration with regular expressions is not
113
 
    # possible - there would have to be multiple places for the same
114
 
    # values, like seconds.  The current code, while more esoteric, is
115
 
    # cleaner without depending on a parsing library.  If Python had a
116
 
    # built-in library for parsing we would use it, but we'd like to
117
 
    # avoid excessive use of external libraries.
118
 
    
119
 
    # New type for defining tokens, syntax, and semantics all-in-one
120
 
    Token = collections.namedtuple("Token",
121
 
                                   ("regexp", # To match token; if
122
 
                                              # "value" is not None,
123
 
                                              # must have a "group"
124
 
                                              # containing digits
125
 
                                    "value",  # datetime.timedelta or
126
 
                                              # None
127
 
                                    "followers")) # Tokens valid after
128
 
                                                  # this token
129
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
130
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
131
 
    token_end = Token(re.compile(r"$"), None, frozenset())
132
 
    token_second = Token(re.compile(r"(\d+)S"),
133
 
                         datetime.timedelta(seconds=1),
134
 
                         frozenset((token_end,)))
135
 
    token_minute = Token(re.compile(r"(\d+)M"),
136
 
                         datetime.timedelta(minutes=1),
137
 
                         frozenset((token_second, token_end)))
138
 
    token_hour = Token(re.compile(r"(\d+)H"),
139
 
                       datetime.timedelta(hours=1),
140
 
                       frozenset((token_minute, token_end)))
141
 
    token_time = Token(re.compile(r"T"),
142
 
                       None,
143
 
                       frozenset((token_hour, token_minute,
144
 
                                  token_second)))
145
 
    token_day = Token(re.compile(r"(\d+)D"),
146
 
                      datetime.timedelta(days=1),
147
 
                      frozenset((token_time, token_end)))
148
 
    token_month = Token(re.compile(r"(\d+)M"),
149
 
                        datetime.timedelta(weeks=4),
150
 
                        frozenset((token_day, token_end)))
151
 
    token_year = Token(re.compile(r"(\d+)Y"),
152
 
                       datetime.timedelta(weeks=52),
153
 
                       frozenset((token_month, token_end)))
154
 
    token_week = Token(re.compile(r"(\d+)W"),
155
 
                       datetime.timedelta(weeks=1),
156
 
                       frozenset((token_end,)))
157
 
    token_duration = Token(re.compile(r"P"), None,
158
 
                           frozenset((token_year, token_month,
159
 
                                      token_day, token_time,
160
 
                                      token_week)))
161
 
    # Define starting values
162
 
    value = datetime.timedelta() # Value so far
163
 
    found_token = None
164
 
    followers = frozenset((token_duration,)) # Following valid tokens
165
 
    s = duration                # String left to parse
166
 
    # Loop until end token is found
167
 
    while found_token is not token_end:
168
 
        # Search for any currently valid tokens
169
 
        for token in followers:
170
 
            match = token.regexp.match(s)
171
 
            if match is not None:
172
 
                # Token found
173
 
                if token.value is not None:
174
 
                    # Value found, parse digits
175
 
                    factor = int(match.group(1), 10)
176
 
                    # Add to value so far
177
 
                    value += factor * token.value
178
 
                # Strip token from string
179
 
                s = token.regexp.sub("", s, 1)
180
 
                # Go to found token
181
 
                found_token = token
182
 
                # Set valid next tokens
183
 
                followers = found_token.followers
184
 
                break
185
 
        else:
186
 
            # No currently valid tokens were found
187
 
            raise ValueError("Invalid RFC 3339 duration")
188
 
    # End token found
189
 
    return value
190
 
 
191
 
 
192
 
def string_to_delta(interval):
193
 
    """Parse a string and return a datetime.timedelta
194
 
    
195
 
    >>> string_to_delta("7d")
196
 
    datetime.timedelta(7)
197
 
    >>> string_to_delta("60s")
198
 
    datetime.timedelta(0, 60)
199
 
    >>> string_to_delta("60m")
200
 
    datetime.timedelta(0, 3600)
201
 
    >>> string_to_delta("24h")
202
 
    datetime.timedelta(1)
203
 
    >>> string_to_delta("1w")
204
 
    datetime.timedelta(7)
205
 
    >>> string_to_delta("5m 30s")
206
 
    datetime.timedelta(0, 330)
207
 
    """
208
 
    
209
 
    try:
210
 
        return rfc3339_duration_to_delta(interval)
211
 
    except ValueError:
212
 
        pass
213
 
    
214
 
    value = datetime.timedelta(0)
215
 
    regexp = re.compile(r"(\d+)([dsmhw]?)")
216
 
    
217
 
    for num, suffix in regexp.findall(interval):
218
 
        if suffix == "d":
219
 
            value += datetime.timedelta(int(num))
220
 
        elif suffix == "s":
221
 
            value += datetime.timedelta(0, int(num))
222
 
        elif suffix == "m":
223
 
            value += datetime.timedelta(0, 0, 0, 0, int(num))
224
 
        elif suffix == "h":
225
 
            value += datetime.timedelta(0, 0, 0, 0, 0, int(num))
226
 
        elif suffix == "w":
227
 
            value += datetime.timedelta(0, 0, 0, 0, 0, 0, int(num))
228
 
        elif suffix == "":
229
 
            value += datetime.timedelta(0, 0, 0, int(num))
230
 
    return value
231
 
 
232
 
def print_clients(clients, keywords):
233
 
    def valuetostring(value, keyword):
234
 
        if type(value) is dbus.Boolean:
235
 
            return "Yes" if value else "No"
236
 
        if keyword in ("Timeout", "Interval", "ApprovalDelay",
237
 
                       "ApprovalDuration", "ExtendedTimeout"):
238
 
            return milliseconds_to_string(value)
239
 
        return str(value)
240
 
    
241
 
    # Create format string to print table rows
242
 
    format_string = " ".join("{{{key}:{width}}}".format(
243
 
            width = max(len(tablewords[key]),
244
 
                        max(len(valuetostring(client[key],
245
 
                                              key))
246
 
                            for client in
247
 
                            clients)),
248
 
            key = key) for key in keywords)
249
 
    # Print header line
250
 
    print(format_string.format(**tablewords))
251
 
    for client in clients:
252
 
        print(format_string.format(**dict((key,
253
 
                                           valuetostring(client[key],
254
 
                                                         key))
255
 
                                          for key in keywords)))
256
 
 
257
 
def has_actions(options):
258
 
    return any((options.enable,
259
 
                options.disable,
260
 
                options.bump_timeout,
261
 
                options.start_checker,
262
 
                options.stop_checker,
263
 
                options.is_enabled,
264
 
                options.remove,
265
 
                options.checker is not None,
266
 
                options.timeout is not None,
267
 
                options.extended_timeout is not None,
268
 
                options.interval is not None,
269
 
                options.approved_by_default is not None,
270
 
                options.approval_delay is not None,
271
 
                options.approval_duration is not None,
272
 
                options.host is not None,
273
 
                options.secret is not None,
274
 
                options.approve,
275
 
                options.deny))
276
 
 
277
 
def main():
278
 
    parser = argparse.ArgumentParser()
279
 
    parser.add_argument("--version", action="version",
280
 
                        version = "%(prog)s {0}".format(version),
281
 
                        help="show version number and exit")
282
 
    parser.add_argument("-a", "--all", action="store_true",
283
 
                        help="Select all clients")
284
 
    parser.add_argument("-v", "--verbose", action="store_true",
285
 
                        help="Print all fields")
286
 
    parser.add_argument("-e", "--enable", action="store_true",
287
 
                        help="Enable client")
288
 
    parser.add_argument("-d", "--disable", action="store_true",
289
 
                        help="disable client")
290
 
    parser.add_argument("-b", "--bump-timeout", action="store_true",
291
 
                        help="Bump timeout for client")
292
 
    parser.add_argument("--start-checker", action="store_true",
293
 
                        help="Start checker for client")
294
 
    parser.add_argument("--stop-checker", action="store_true",
295
 
                        help="Stop checker for client")
296
 
    parser.add_argument("-V", "--is-enabled", action="store_true",
297
 
                        help="Check if client is enabled")
298
 
    parser.add_argument("-r", "--remove", action="store_true",
299
 
                        help="Remove client")
300
 
    parser.add_argument("-c", "--checker",
301
 
                        help="Set checker command for client")
302
 
    parser.add_argument("-t", "--timeout",
303
 
                        help="Set timeout for client")
304
 
    parser.add_argument("--extended-timeout",
305
 
                        help="Set extended timeout for client")
306
 
    parser.add_argument("-i", "--interval",
307
 
                        help="Set checker interval for client")
308
 
    parser.add_argument("--approve-by-default", action="store_true",
309
 
                        default=None, dest="approved_by_default",
310
 
                        help="Set client to be approved by default")
311
 
    parser.add_argument("--deny-by-default", action="store_false",
312
 
                        dest="approved_by_default",
313
 
                        help="Set client to be denied by default")
314
 
    parser.add_argument("--approval-delay",
315
 
                        help="Set delay before client approve/deny")
316
 
    parser.add_argument("--approval-duration",
317
 
                        help="Set duration of one client approval")
318
 
    parser.add_argument("-H", "--host", help="Set host for client")
319
 
    parser.add_argument("-s", "--secret",
320
 
                        type=argparse.FileType(mode="rb"),
321
 
                        help="Set password blob (file) for client")
322
 
    parser.add_argument("-A", "--approve", action="store_true",
323
 
                        help="Approve any current client request")
324
 
    parser.add_argument("-D", "--deny", action="store_true",
325
 
                        help="Deny any current client request")
326
 
    parser.add_argument("--check", action="store_true",
327
 
                        help="Run self-test")
328
 
    parser.add_argument("client", nargs="*", help="Client name")
329
 
    options = parser.parse_args()
330
 
    
331
 
    if has_actions(options) and not (options.client or options.all):
332
 
        parser.error("Options require clients names or --all.")
333
 
    if options.verbose and has_actions(options):
334
 
        parser.error("--verbose can only be used alone or with"
335
 
                     " --all.")
336
 
    if options.all and not has_actions(options):
337
 
        parser.error("--all requires an action.")
338
 
 
339
 
    if options.check:
340
 
        fail_count, test_count = doctest.testmod()
341
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
342
 
    
343
 
    try:
344
 
        bus = dbus.SystemBus()
345
 
        mandos_dbus_objc = bus.get_object(busname, server_path)
346
 
    except dbus.exceptions.DBusException:
347
 
        print("Could not connect to Mandos server",
348
 
              file=sys.stderr)
349
 
        sys.exit(1)
350
 
    
351
 
    mandos_serv = dbus.Interface(mandos_dbus_objc,
352
 
                                 dbus_interface = server_interface)
353
 
    
354
 
    #block stderr since dbus library prints to stderr
355
 
    null = os.open(os.path.devnull, os.O_RDWR)
356
 
    stderrcopy = os.dup(sys.stderr.fileno())
357
 
    os.dup2(null, sys.stderr.fileno())
358
 
    os.close(null)
359
 
    try:
360
 
        try:
361
 
            mandos_clients = mandos_serv.GetAllClientsWithProperties()
362
 
        finally:
363
 
            #restore stderr
364
 
            os.dup2(stderrcopy, sys.stderr.fileno())
365
 
            os.close(stderrcopy)
366
 
    except dbus.exceptions.DBusException:
367
 
        print("Access denied: Accessing mandos server through dbus.",
368
 
              file=sys.stderr)
369
 
        sys.exit(1)
370
 
    
371
 
    # Compile dict of (clients: properties) to process
372
 
    clients={}
373
 
    
374
 
    if options.all or not options.client:
375
 
        clients = dict((bus.get_object(busname, path), properties)
376
 
                       for path, properties in
377
 
                       mandos_clients.items())
378
 
    else:
379
 
        for name in options.client:
380
 
            for path, client in mandos_clients.iteritems():
381
 
                if client["Name"] == name:
382
 
                    client_objc = bus.get_object(busname, path)
383
 
                    clients[client_objc] = client
384
 
                    break
385
 
            else:
386
 
                print("Client not found on server: {0!r}"
387
 
                      .format(name), file=sys.stderr)
388
 
                sys.exit(1)
389
 
    
390
 
    if not has_actions(options) and clients:
391
 
        if options.verbose:
392
 
            keywords = ("Name", "Enabled", "Timeout",
393
 
                        "LastCheckedOK", "Created", "Interval",
394
 
                        "Host", "Fingerprint", "CheckerRunning",
395
 
                        "LastEnabled", "ApprovalPending",
396
 
                        "ApprovedByDefault",
397
 
                        "LastApprovalRequest", "ApprovalDelay",
398
 
                        "ApprovalDuration", "Checker",
399
 
                        "ExtendedTimeout")
400
 
        else:
401
 
            keywords = defaultkeywords
402
 
        
403
 
        print_clients(clients.values(), keywords)
404
 
    else:
405
 
        # Process each client in the list by all selected options
406
 
        for client in clients:
407
 
            def set_client_prop(prop, value):
408
 
                """Set a Client D-Bus property"""
409
 
                client.Set(client_interface, prop, value,
410
 
                           dbus_interface=dbus.PROPERTIES_IFACE)
411
 
            def set_client_prop_ms(prop, value):
412
 
                """Set a Client D-Bus property, converted
413
 
                from a string to milliseconds."""
414
 
                set_client_prop(prop,
415
 
                                timedelta_to_milliseconds
416
 
                                (string_to_delta(value)))
417
 
            if options.remove:
418
 
                mandos_serv.RemoveClient(client.__dbus_object_path__)
419
 
            if options.enable:
420
 
                set_client_prop("Enabled", dbus.Boolean(True))
421
 
            if options.disable:
422
 
                set_client_prop("Enabled", dbus.Boolean(False))
423
 
            if options.bump_timeout:
424
 
                set_client_prop("LastCheckedOK", "")
425
 
            if options.start_checker:
426
 
                set_client_prop("CheckerRunning", dbus.Boolean(True))
427
 
            if options.stop_checker:
428
 
                set_client_prop("CheckerRunning", dbus.Boolean(False))
429
 
            if options.is_enabled:
430
 
                sys.exit(0 if client.Get(client_interface,
431
 
                                         "Enabled",
432
 
                                         dbus_interface=
433
 
                                         dbus.PROPERTIES_IFACE)
434
 
                         else 1)
435
 
            if options.checker is not None:
436
 
                set_client_prop("Checker", options.checker)
437
 
            if options.host is not None:
438
 
                set_client_prop("Host", options.host)
439
 
            if options.interval is not None:
440
 
                set_client_prop_ms("Interval", options.interval)
441
 
            if options.approval_delay is not None:
442
 
                set_client_prop_ms("ApprovalDelay",
443
 
                                   options.approval_delay)
444
 
            if options.approval_duration is not None:
445
 
                set_client_prop_ms("ApprovalDuration",
446
 
                                   options.approval_duration)
447
 
            if options.timeout is not None:
448
 
                set_client_prop_ms("Timeout", options.timeout)
449
 
            if options.extended_timeout is not None:
450
 
                set_client_prop_ms("ExtendedTimeout",
451
 
                                   options.extended_timeout)
452
 
            if options.secret is not None:
453
 
                set_client_prop("Secret",
454
 
                                dbus.ByteArray(options.secret.read()))
455
 
            if options.approved_by_default is not None:
456
 
                set_client_prop("ApprovedByDefault",
457
 
                                dbus.Boolean(options
458
 
                                             .approved_by_default))
459
 
            if options.approve:
460
 
                client.Approve(dbus.Boolean(True),
461
 
                               dbus_interface=client_interface)
462
 
            elif options.deny:
463
 
                client.Approve(dbus.Boolean(False),
464
 
                               dbus_interface=client_interface)
465
 
 
466
 
if __name__ == "__main__":
467
 
    main()