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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 © 2008-2015 Teddy Hogeborn
7
 
# Copyright © 2008-2015 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.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
 
}
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 = "1.6.9"
76
 
 
77
 
 
78
 
def milliseconds_to_string(ms):
79
 
    td = datetime.timedelta(0, 0, 0, ms)
80
 
    return ("{days}{hours:02}:{minutes:02}:{seconds:02}".format(
81
 
        days = "{}T".format(td.days) if td.days else "",
82
 
        hours = td.seconds // 3600,
83
 
        minutes = (td.seconds % 3600) // 60,
84
 
        seconds = td.seconds % 60))
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
 
 
227
 
def print_clients(clients, keywords):
228
 
    def valuetostring(value, keyword):
229
 
        if type(value) is dbus.Boolean:
230
 
            return "Yes" if value else "No"
231
 
        if keyword in ("Timeout", "Interval", "ApprovalDelay",
232
 
                       "ApprovalDuration", "ExtendedTimeout"):
233
 
            return milliseconds_to_string(value)
234
 
        return str(value)
235
 
    
236
 
    # Create format string to print table rows
237
 
    format_string = " ".join("{{{key}:{width}}}".format(
238
 
        width = max(len(tablewords[key]),
239
 
                    max(len(valuetostring(client[key], key))
240
 
                        for client in clients)),
241
 
        key = key)
242
 
                             for key in keywords)
243
 
    # Print header line
244
 
    print(format_string.format(**tablewords))
245
 
    for client in clients:
246
 
        print(format_string.format(**{
247
 
            key: valuetostring(client[key], key)
248
 
            for key in keywords }))
249
 
 
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
 
 
272
 
def main():
273
 
    parser = argparse.ArgumentParser()
274
 
    parser.add_argument("--version", action="version",
275
 
                        version = "%(prog)s {}".format(version),
276
 
                        help="show version number and exit")
277
 
    parser.add_argument("-a", "--all", action="store_true",
278
 
                        help="Select all clients")
279
 
    parser.add_argument("-v", "--verbose", action="store_true",
280
 
                        help="Print all fields")
281
 
    parser.add_argument("-e", "--enable", action="store_true",
282
 
                        help="Enable client")
283
 
    parser.add_argument("-d", "--disable", action="store_true",
284
 
                        help="disable client")
285
 
    parser.add_argument("-b", "--bump-timeout", action="store_true",
286
 
                        help="Bump timeout for client")
287
 
    parser.add_argument("--start-checker", action="store_true",
288
 
                        help="Start checker for client")
289
 
    parser.add_argument("--stop-checker", action="store_true",
290
 
                        help="Stop checker for client")
291
 
    parser.add_argument("-V", "--is-enabled", action="store_true",
292
 
                        help="Check if client is enabled")
293
 
    parser.add_argument("-r", "--remove", action="store_true",
294
 
                        help="Remove client")
295
 
    parser.add_argument("-c", "--checker",
296
 
                        help="Set checker command for client")
297
 
    parser.add_argument("-t", "--timeout",
298
 
                        help="Set timeout for client")
299
 
    parser.add_argument("--extended-timeout",
300
 
                        help="Set extended timeout for client")
301
 
    parser.add_argument("-i", "--interval",
302
 
                        help="Set checker interval for client")
303
 
    parser.add_argument("--approve-by-default", action="store_true",
304
 
                        default=None, dest="approved_by_default",
305
 
                        help="Set client to be approved by default")
306
 
    parser.add_argument("--deny-by-default", action="store_false",
307
 
                        dest="approved_by_default",
308
 
                        help="Set client to be denied by default")
309
 
    parser.add_argument("--approval-delay",
310
 
                        help="Set delay before client approve/deny")
311
 
    parser.add_argument("--approval-duration",
312
 
                        help="Set duration of one client approval")
313
 
    parser.add_argument("-H", "--host", help="Set host for client")
314
 
    parser.add_argument("-s", "--secret",
315
 
                        type=argparse.FileType(mode="rb"),
316
 
                        help="Set password blob (file) for client")
317
 
    parser.add_argument("-A", "--approve", action="store_true",
318
 
                        help="Approve any current client request")
319
 
    parser.add_argument("-D", "--deny", action="store_true",
320
 
                        help="Deny any current client request")
321
 
    parser.add_argument("--check", action="store_true",
322
 
                        help="Run self-test")
323
 
    parser.add_argument("client", nargs="*", help="Client name")
324
 
    options = parser.parse_args()
325
 
    
326
 
    if has_actions(options) and not (options.client or options.all):
327
 
        parser.error("Options require clients names or --all.")
328
 
    if options.verbose and has_actions(options):
329
 
        parser.error("--verbose can only be used alone or with"
330
 
                     " --all.")
331
 
    if options.all and not has_actions(options):
332
 
        parser.error("--all requires an action.")
333
 
 
334
 
    if options.check:
335
 
        fail_count, test_count = doctest.testmod()
336
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
337
 
    
338
 
    try:
339
 
        bus = dbus.SystemBus()
340
 
        mandos_dbus_objc = bus.get_object(busname, server_path)
341
 
    except dbus.exceptions.DBusException:
342
 
        print("Could not connect to Mandos server", file=sys.stderr)
343
 
        sys.exit(1)
344
 
    
345
 
    mandos_serv = dbus.Interface(mandos_dbus_objc,
346
 
                                 dbus_interface = server_interface)
347
 
    
348
 
    #block stderr since dbus library prints to stderr
349
 
    null = os.open(os.path.devnull, os.O_RDWR)
350
 
    stderrcopy = os.dup(sys.stderr.fileno())
351
 
    os.dup2(null, sys.stderr.fileno())
352
 
    os.close(null)
353
 
    try:
354
 
        try:
355
 
            mandos_clients = mandos_serv.GetAllClientsWithProperties()
356
 
        finally:
357
 
            #restore stderr
358
 
            os.dup2(stderrcopy, sys.stderr.fileno())
359
 
            os.close(stderrcopy)
360
 
    except dbus.exceptions.DBusException:
361
 
        print("Access denied: Accessing mandos server through dbus.",
362
 
              file=sys.stderr)
363
 
        sys.exit(1)
364
 
    
365
 
    # Compile dict of (clients: properties) to process
366
 
    clients={}
367
 
    
368
 
    if options.all or not options.client:
369
 
        clients = { bus.get_object(busname, path): properties
370
 
                    for path, properties in mandos_clients.items() }
371
 
    else:
372
 
        for name in options.client:
373
 
            for path, client in mandos_clients.items():
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: {!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", "LastCheckedOK",
386
 
                        "Created", "Interval", "Host", "Fingerprint",
387
 
                        "CheckerRunning", "LastEnabled",
388
 
                        "ApprovalPending", "ApprovedByDefault",
389
 
                        "LastApprovalRequest", "ApprovalDelay",
390
 
                        "ApprovalDuration", "Checker",
391
 
                        "ExtendedTimeout")
392
 
        else:
393
 
            keywords = defaultkeywords
394
 
        
395
 
        print_clients(clients.values(), keywords)
396
 
    else:
397
 
        # Process each client in the list by all selected options
398
 
        for client in clients:
399
 
            
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
 
            
405
 
            def set_client_prop_ms(prop, value):
406
 
                """Set a Client D-Bus property, converted
407
 
                from a string to milliseconds."""
408
 
                set_client_prop(prop,
409
 
                                string_to_delta(value).total_seconds()
410
 
                                * 1000)
411
 
            
412
 
            if options.remove:
413
 
                mandos_serv.RemoveClient(client.__dbus_object_path__)
414
 
            if options.enable:
415
 
                set_client_prop("Enabled", dbus.Boolean(True))
416
 
            if options.disable:
417
 
                set_client_prop("Enabled", dbus.Boolean(False))
418
 
            if options.bump_timeout:
419
 
                set_client_prop("LastCheckedOK", "")
420
 
            if options.start_checker:
421
 
                set_client_prop("CheckerRunning", dbus.Boolean(True))
422
 
            if options.stop_checker:
423
 
                set_client_prop("CheckerRunning", dbus.Boolean(False))
424
 
            if options.is_enabled:
425
 
                sys.exit(0 if client.Get(client_interface,
426
 
                                         "Enabled",
427
 
                                         dbus_interface=
428
 
                                         dbus.PROPERTIES_IFACE)
429
 
                         else 1)
430
 
            if options.checker is not None:
431
 
                set_client_prop("Checker", options.checker)
432
 
            if options.host is not None:
433
 
                set_client_prop("Host", options.host)
434
 
            if options.interval is not None:
435
 
                set_client_prop_ms("Interval", options.interval)
436
 
            if options.approval_delay is not None:
437
 
                set_client_prop_ms("ApprovalDelay",
438
 
                                   options.approval_delay)
439
 
            if options.approval_duration is not None:
440
 
                set_client_prop_ms("ApprovalDuration",
441
 
                                   options.approval_duration)
442
 
            if options.timeout is not None:
443
 
                set_client_prop_ms("Timeout", options.timeout)
444
 
            if options.extended_timeout is not None:
445
 
                set_client_prop_ms("ExtendedTimeout",
446
 
                                   options.extended_timeout)
447
 
            if options.secret is not None:
448
 
                set_client_prop("Secret",
449
 
                                dbus.ByteArray(options.secret.read()))
450
 
            if options.approved_by_default is not None:
451
 
                set_client_prop("ApprovedByDefault",
452
 
                                dbus.Boolean(options
453
 
                                             .approved_by_default))
454
 
            if options.approve:
455
 
                client.Approve(dbus.Boolean(True),
456
 
                               dbus_interface=client_interface)
457
 
            elif options.deny:
458
 
                client.Approve(dbus.Boolean(False),
459
 
                               dbus_interface=client_interface)
460
 
 
461
 
 
462
 
if __name__ == "__main__":
463
 
    main()