2
 
# -*- mode: python; coding: utf-8 -*-
 
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# Mandos Monitor - Control and monitor the Mandos server
 
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# Copyright © 2008-2016 Teddy Hogeborn
 
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# Copyright © 2008-2016 Björn Påhlsson
 
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# This program is free software: you can redistribute it and/or modify
 
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# 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
 
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# (at your option) any later version.
 
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#     This program is distributed in the hope that it will be useful,
 
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#     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.
 
19
 
# You should have received a copy of the GNU General Public License
 
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# along with this program.  If not, see
 
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# <http://www.gnu.org/licenses/>.
 
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# Contact the authors at <mandos@recompile.se>.
 
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from __future__ import (division, absolute_import, print_function,
 
30
 
    from future_builtins import *
 
46
 
if sys.version_info.major == 2:
 
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locale.setlocale(locale.LC_ALL, "")
 
55
 
    "LastCheckedOK": "Last Successful Check",
 
56
 
    "LastApprovalRequest": "Last Approval Request",
 
58
 
    "Interval": "Interval",
 
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",
 
68
 
    "ExtendedTimeout": "Extended Timeout",
 
70
 
    "LastCheckerStatus": "Last Checker Status",
 
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defaultkeywords = ("Name", "Enabled", "Timeout", "LastCheckedOK")
 
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domain = "se.recompile"
 
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busname = domain + ".Mandos"
 
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server_interface = domain + ".Mandos"
 
77
 
client_interface = domain + ".Mandos.Client"
 
82
 
    dbus.OBJECT_MANAGER_IFACE
 
83
 
except AttributeError:
 
84
 
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
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))
 
96
 
def rfc3339_duration_to_delta(duration):
 
97
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
 
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)
 
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.
 
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"),
 
142
 
                       frozenset((token_hour, token_minute,
 
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,
 
160
 
    # Define starting values:
 
162
 
    value = datetime.timedelta()
 
164
 
    # Following valid tokens
 
165
 
    followers = frozenset((token_duration, ))
 
166
 
    # String left to parse
 
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:
 
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)
 
184
 
                # Set valid next tokens
 
185
 
                followers = found_token.followers
 
188
 
            # No currently valid tokens were found
 
189
 
            raise ValueError("Invalid RFC 3339 duration: {!r}"
 
195
 
def string_to_delta(interval):
 
196
 
    """Parse a string and return a datetime.timedelta
 
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)
 
213
 
        return rfc3339_duration_to_delta(interval)
 
217
 
    value = datetime.timedelta(0)
 
218
 
    regexp = re.compile(r"(\d+)([dsmhw]?)")
 
220
 
    for num, suffix in regexp.findall(interval):
 
222
 
            value += datetime.timedelta(int(num))
 
224
 
            value += datetime.timedelta(0, int(num))
 
226
 
            value += datetime.timedelta(0, 0, 0, 0, int(num))
 
228
 
            value += datetime.timedelta(0, 0, 0, 0, 0, int(num))
 
230
 
            value += datetime.timedelta(0, 0, 0, 0, 0, 0, int(num))
 
232
 
            value += datetime.timedelta(0, 0, 0, int(num))
 
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)
 
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)),
 
253
 
    print(format_string.format(**tablewords))
 
254
 
    for client in clients:
 
256
 
              .format(**{key: valuetostring(client[key], key)
 
257
 
                         for key in keywords}))
 
260
 
def has_actions(options):
 
261
 
    return any((options.enable,
 
263
 
                options.bump_timeout,
 
264
 
                options.start_checker,
 
265
 
                options.stop_checker,
 
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,
 
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()
 
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.")
 
348
 
        fail_count, test_count = doctest.testmod()
 
349
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
 
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)
 
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)
 
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())
 
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}
 
377
 
            os.dup2(stderrcopy, sys.stderr.fileno())
 
379
 
    except dbus.exceptions.DBusException as e:
 
380
 
        print("Access denied: "
 
381
 
              "Accessing mandos server through D-Bus: {}".format(e),
 
385
 
    # Compile dict of (clients: properties) to process
 
388
 
    if options.all or not options.client:
 
389
 
        clients = {bus.get_object(busname, path): properties
 
390
 
                   for path, properties in mandos_clients.items()}
 
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
 
399
 
                print("Client not found on server: {!r}"
 
400
 
                      .format(name), file=sys.stderr)
 
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",
 
414
 
            keywords = defaultkeywords
 
416
 
        if options.dump_json:
 
417
 
            json.dump({client["Name"]: {key:
 
419
 
                                        if isinstance(client[key],
 
423
 
                       for client in clients.values()},
 
424
 
                      fp=sys.stdout, indent=4,
 
425
 
                      separators=(',', ': '))
 
428
 
            print_clients(clients.values(), keywords)
 
430
 
        # Process each client in the list by all selected options
 
431
 
        for client in clients:
 
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)
 
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()
 
446
 
                mandos_serv.RemoveClient(client.__dbus_object_path__)
 
448
 
                set_client_prop("Enabled", dbus.Boolean(True))
 
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):
 
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",
 
486
 
                                             .approved_by_default))
 
488
 
                client.Approve(dbus.Boolean(True),
 
489
 
                               dbus_interface=client_interface)
 
491
 
                client.Approve(dbus.Boolean(False),
 
492
 
                               dbus_interface=client_interface)
 
495
 
if __name__ == "__main__":