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- Committer: Björn Påhlsson
- Date: 2008-07-22 06:27:12 UTC
- mfrom: (27 mandos)
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 30.
- Revision ID: belorn@braxen-20080722062712-akkycfgee7pn5syr
merge
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
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# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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# methods "add" and "remove" in the "AvahiService" class, the
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# "server_state_changed" and "entry_group_state_changed" functions,
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# and some lines in "main".
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# following functions: "add_service", "remove_service",
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# "server_state_changed", "entry_group_state_changed", and some lines
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# in "main".
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#
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# Everything else is
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
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# Påhlsson.
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#
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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
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# GNU General Public License for more details.
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#
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# 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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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@fukt.bsnet.se>.
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# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
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# <https://www.fukt.bsnet.se/~teddy/>.
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#
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32
34
from __future__ import division, with_statement, absolute_import
33
from __future__ import division
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import SocketServer
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import socket
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import optparse
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import select
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from optparse import OptionParser
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import datetime
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import errno
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import gnutls.crypto
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import stat
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import logging
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import logging.handlers
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import pwd
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from contextlib import closing
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import dbus
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import dbus.service
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import gobject
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import avahi
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from dbus.mainloop.glib import DBusGMainLoop
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import ctypes
67
import ctypes.util
68
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version = "1.0.5"
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# Brief description of the operation of this program:
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#
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# This server announces itself as a Zeroconf service. Connecting
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# clients use the TLS protocol, with the unusual quirk that this
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# server program acts as a TLS "client" while the connecting clients
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# acts as a TLS "server". The clients (acting as a TLS "server") must
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# supply an OpenPGP certificate, and the fingerprint of this
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# certificate is used by this server to look up (in a list read from a
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# file at start time) which binary blob to give the client. No other
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# authentication or authorization is done by this server.
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logger = logging.Logger('mandos')
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
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syslogger = logging.handlers.SysLogHandler\
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
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syslogger.setFormatter(logging.Formatter\
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('%(levelname)s: %(message)s'))
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
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' %(levelname)s: %(message)s'))
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logger.addHandler(console)
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85
class AvahiError(Exception):
86
def __init__(self, value, *args, **kwargs):
87
self.value = value
88
super(AvahiError, self).__init__(value, *args, **kwargs)
89
def __unicode__(self):
90
return unicode(repr(self.value))
91
92
class AvahiServiceError(AvahiError):
93
pass
94
95
class AvahiGroupError(AvahiError):
96
pass
97
98
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
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Attributes:
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interface: integer; avahi.IF_UNSPEC or an interface index.
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Used to optionally bind to the specified interface.
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name: string; Example: 'Mandos'
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type: string; Example: '_mandos._tcp'.
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See <http://www.dns-sd.org/ServiceTypes.html>
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port: integer; what port to announce
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TXT: list of strings; TXT record for the service
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domain: string; Domain to publish on, default to .local if empty.
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host: string; Host to publish records for, default is localhost
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max_renames: integer; maximum number of renames
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rename_count: integer; counter so we only rename after collisions
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a sensible number of times
114
"""
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768,
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protocol = avahi.PROTO_UNSPEC):
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self.interface = interface
120
self.name = name
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self.type = servicetype
122
self.port = port
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self.TXT = TXT if TXT is not None else []
124
self.domain = domain
125
self.host = host
126
self.rename_count = 0
127
self.max_renames = max_renames
128
self.protocol = protocol
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def rename(self):
130
"""Derived from the Avahi example code"""
131
if self.rename_count >= self.max_renames:
132
logger.critical(u"No suitable Zeroconf service name found"
133
u" after %i retries, exiting.",
134
self.rename_count)
135
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
137
logger.info(u"Changing Zeroconf service name to %r ...",
138
str(self.name))
139
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s): %%(levelname)s:'
141
' %%(message)s' % self.name))
142
self.remove()
143
self.add()
144
self.rename_count += 1
145
def remove(self):
146
"""Derived from the Avahi example code"""
147
if group is not None:
148
group.Reset()
149
def add(self):
150
"""Derived from the Avahi example code"""
151
global group
152
if group is None:
153
group = dbus.Interface(bus.get_object
154
(avahi.DBUS_NAME,
155
server.EntryGroupNew()),
156
avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
group.connect_to_signal('StateChanged',
158
entry_group_state_changed)
159
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
160
service.name, service.type)
161
group.AddService(
162
self.interface, # interface
163
self.protocol, # protocol
164
dbus.UInt32(0), # flags
165
self.name, self.type,
166
self.domain, self.host,
167
dbus.UInt16(self.port),
168
avahi.string_array_to_txt_array(self.TXT))
169
group.Commit()
170
83
del syslogger
84
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# This variable is used to optionally bind to a specified interface.
86
# It is a global variable to fit in with the other variables from the
87
# Avahi example code.
88
serviceInterface = avahi.IF_UNSPEC
171
89
# From the Avahi example code:
172
group = None # our entry group
90
serviceName = None
91
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
92
servicePort = None # Not known at startup
93
serviceTXT = [] # TXT record for the service
94
domain = "" # Domain to publish on, default to .local
95
host = "" # Host to publish records for, default to localhost
96
group = None #our entry group
97
rename_count = 12 # Counter so we only rename after collisions a
98
# sensible number of times
173
99
# End of Avahi example code
174
100
175
101
176
def _datetime_to_dbus(dt, variant_level=0):
177
"""Convert a UTC datetime.datetime() to a D-Bus type."""
178
return dbus.String(dt.isoformat(), variant_level=variant_level)
179
180
181
class Client(dbus.service.Object):
102
class Client(object):
182
103
"""A representation of a client host served by this server.
183
104
Attributes:
184
name: string; from the config file, used in log messages and
185
D-Bus identifiers
105
name: string; from the config file, used in log messages
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fingerprint: string (40 or 32 hexadecimal digits); used to
187
107
uniquely identify the client
188
secret: bytestring; sent verbatim (over TLS) to client
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host: string; available for use by the checker command
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created: datetime.datetime(); (UTC) object creation
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last_enabled: datetime.datetime(); (UTC)
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enabled: bool()
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last_checked_ok: datetime.datetime(); (UTC) or None
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timeout: datetime.timedelta(); How long from last_checked_ok
195
until this client is invalid
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interval: datetime.timedelta(); How often to start a new checker
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disable_hook: If set, called by disable() as disable_hook(self)
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checker: subprocess.Popen(); a running checker process used
199
to see if the client lives.
200
'None' if no process is running.
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secret: bytestring; sent verbatim (over TLS) to client
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fqdn: string (FQDN); available for use by the checker command
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created: datetime.datetime()
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last_seen: datetime.datetime() or None if not yet seen
112
timeout: datetime.timedelta(); How long from last_seen until
113
this client is invalid
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interval: datetime.timedelta(); How often to start a new checker
115
stop_hook: If set, called by stop() as stop_hook(self)
116
checker: subprocess.Popen(); a running checker process used
117
to see if the client lives.
118
Is None if no process is running.
201
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checker_initiator_tag: a gobject event source tag, or None
202
disable_initiator_tag: - '' -
120
stop_initiator_tag: - '' -
203
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checker_callback_tag: - '' -
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checker_command: string; External command which is run to check if
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client lives. %() expansions are done at
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client lives. %()s expansions are done at
206
124
runtime with vars(self) as dict, so that for
207
125
instance %(name)s can be used in the command.
208
use_dbus: bool(); Whether to provide D-Bus interface and signals
209
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
126
Private attibutes:
127
_timeout: Real variable for 'timeout'
128
_interval: Real variable for 'interval'
129
_timeout_milliseconds: Used by gobject.timeout_add()
130
_interval_milliseconds: - '' -
210
131
"""
211
def timeout_milliseconds(self):
212
"Return the 'timeout' attribute in milliseconds"
213
return ((self.timeout.days * 24 * 60 * 60 * 1000)
214
+ (self.timeout.seconds * 1000)
215
+ (self.timeout.microseconds // 1000))
216
217
def interval_milliseconds(self):
218
"Return the 'interval' attribute in milliseconds"
219
return ((self.interval.days * 24 * 60 * 60 * 1000)
220
+ (self.interval.seconds * 1000)
221
+ (self.interval.microseconds // 1000))
222
223
def __init__(self, name = None, disable_hook=None, config=None,
224
use_dbus=True):
225
"""Note: the 'checker' key in 'config' sets the
226
'checker_command' attribute and *not* the 'checker'
227
attribute."""
132
def _set_timeout(self, timeout):
133
"Setter function for 'timeout' attribute"
134
self._timeout = timeout
135
self._timeout_milliseconds = ((self.timeout.days
136
* 24 * 60 * 60 * 1000)
137
+ (self.timeout.seconds * 1000)
138
+ (self.timeout.microseconds
139
// 1000))
140
timeout = property(lambda self: self._timeout,
141
_set_timeout)
142
del _set_timeout
143
def _set_interval(self, interval):
144
"Setter function for 'interval' attribute"
145
self._interval = interval
146
self._interval_milliseconds = ((self.interval.days
147
* 24 * 60 * 60 * 1000)
148
+ (self.interval.seconds
149
* 1000)
150
+ (self.interval.microseconds
151
// 1000))
152
interval = property(lambda self: self._interval,
153
_set_interval)
154
del _set_interval
155
def __init__(self, name=None, stop_hook=None, fingerprint=None,
156
secret=None, secfile=None, fqdn=None, timeout=None,
157
interval=-1, checker=None):
158
"""Note: the 'checker' argument sets the 'checker_command'
159
attribute and not the 'checker' attribute.."""
228
160
self.name = name
229
if config is None:
230
config = {}
231
161
logger.debug(u"Creating client %r", self.name)
232
self.use_dbus = False # During __init__
233
# Uppercase and remove spaces from fingerprint for later
234
# comparison purposes with return value from the fingerprint()
235
# function
236
self.fingerprint = (config["fingerprint"].upper()
237
.replace(u" ", u""))
162
# Uppercase and remove spaces from fingerprint
163
# for later comparison purposes with return value of
164
# the fingerprint() function
165
self.fingerprint = fingerprint.upper().replace(u" ", u"")
238
166
logger.debug(u" Fingerprint: %s", self.fingerprint)
239
if "secret" in config:
240
self.secret = config["secret"].decode(u"base64")
241
elif "secfile" in config:
242
with closing(open(os.path.expanduser
243
(os.path.expandvars
244
(config["secfile"])))) as secfile:
245
self.secret = secfile.read()
167
if secret:
168
self.secret = secret.decode(u"base64")
169
elif secfile:
170
sf = open(secfile)
171
self.secret = sf.read()
172
sf.close()
246
173
else:
247
raise TypeError(u"No secret or secfile for client %s"
248
% self.name)
249
self.host = config.get("host", "")
250
self.created = datetime.datetime.utcnow()
251
self.enabled = False
252
self.last_enabled = None
253
self.last_checked_ok = None
254
self.timeout = string_to_delta(config["timeout"])
255
self.interval = string_to_delta(config["interval"])
256
self.disable_hook = disable_hook
174
raise RuntimeError(u"No secret or secfile for client %s"
175
% self.name)
176
self.fqdn = fqdn # string
177
self.created = datetime.datetime.now()
178
self.last_seen = None
179
self.timeout = string_to_delta(timeout)
180
self.interval = string_to_delta(interval)
181
self.stop_hook = stop_hook
257
182
self.checker = None
258
183
self.checker_initiator_tag = None
259
self.disable_initiator_tag = None
184
self.stop_initiator_tag = None
260
185
self.checker_callback_tag = None
261
self.checker_command = config["checker"]
262
self.last_connect = None
263
# Only now, when this client is initialized, can it show up on
264
# the D-Bus
265
self.use_dbus = use_dbus
266
if self.use_dbus:
267
self.dbus_object_path = (dbus.ObjectPath
268
("/clients/"
269
+ self.name.replace(".", "_")))
270
dbus.service.Object.__init__(self, bus,
271
self.dbus_object_path)
272
273
def enable(self):
186
self.check_command = checker
187
def start(self):
274
188
"""Start this client's checker and timeout hooks"""
275
self.last_enabled = datetime.datetime.utcnow()
276
189
# Schedule a new checker to be started an 'interval' from now,
277
190
# and every interval from then on.
278
self.checker_initiator_tag = (gobject.timeout_add
279
(self.interval_milliseconds(),
280
self.start_checker))
191
self.checker_initiator_tag = gobject.timeout_add\
192
(self._interval_milliseconds,
193
self.start_checker)
281
194
# Also start a new checker *right now*.
282
195
self.start_checker()
283
# Schedule a disable() when 'timeout' has passed
284
self.disable_initiator_tag = (gobject.timeout_add
285
(self.timeout_milliseconds(),
286
self.disable))
287
self.enabled = True
288
if self.use_dbus:
289
# Emit D-Bus signals
290
self.PropertyChanged(dbus.String(u"enabled"),
291
dbus.Boolean(True, variant_level=1))
292
self.PropertyChanged(dbus.String(u"last_enabled"),
293
(_datetime_to_dbus(self.last_enabled,
294
variant_level=1)))
295
296
def disable(self):
297
"""Disable this client."""
298
if not getattr(self, "enabled", False):
196
# Schedule a stop() when 'timeout' has passed
197
self.stop_initiator_tag = gobject.timeout_add\
198
(self._timeout_milliseconds,
199
self.stop)
200
def stop(self):
201
"""Stop this client.
202
The possibility that this client might be restarted is left
203
open, but not currently used."""
204
# If this client doesn't have a secret, it is already stopped.
205
if self.secret:
206
logger.debug(u"Stopping client %s", self.name)
207
self.secret = None
208
else:
299
209
return False
300
logger.info(u"Disabling client %s", self.name)
301
if getattr(self, "disable_initiator_tag", False):
302
gobject.source_remove(self.disable_initiator_tag)
303
self.disable_initiator_tag = None
304
if getattr(self, "checker_initiator_tag", False):
210
if hasattr(self, "stop_initiator_tag") \
211
and self.stop_initiator_tag:
212
gobject.source_remove(self.stop_initiator_tag)
213
self.stop_initiator_tag = None
214
if hasattr(self, "checker_initiator_tag") \
215
and self.checker_initiator_tag:
305
216
gobject.source_remove(self.checker_initiator_tag)
306
217
self.checker_initiator_tag = None
307
218
self.stop_checker()
308
if self.disable_hook:
309
self.disable_hook(self)
310
self.enabled = False
311
if self.use_dbus:
312
# Emit D-Bus signal
313
self.PropertyChanged(dbus.String(u"enabled"),
314
dbus.Boolean(False, variant_level=1))
219
if self.stop_hook:
220
self.stop_hook(self)
315
221
# Do not run this again if called by a gobject.timeout_add
316
222
return False
317
318
223
def __del__(self):
319
self.disable_hook = None
320
self.disable()
321
322
def checker_callback(self, pid, condition, command):
224
self.stop_hook = None
225
self.stop()
226
def checker_callback(self, pid, condition):
323
227
"""The checker has completed, so take appropriate actions."""
228
now = datetime.datetime.now()
324
229
self.checker_callback_tag = None
325
230
self.checker = None
326
if self.use_dbus:
327
# Emit D-Bus signal
328
self.PropertyChanged(dbus.String(u"checker_running"),
329
dbus.Boolean(False, variant_level=1))
330
if os.WIFEXITED(condition):
331
exitstatus = os.WEXITSTATUS(condition)
332
if exitstatus == 0:
333
logger.info(u"Checker for %(name)s succeeded",
334
vars(self))
335
self.checked_ok()
336
else:
337
logger.info(u"Checker for %(name)s failed",
338
vars(self))
339
if self.use_dbus:
340
# Emit D-Bus signal
341
self.CheckerCompleted(dbus.Int16(exitstatus),
342
dbus.Int64(condition),
343
dbus.String(command))
344
else:
231
if os.WIFEXITED(condition) \
232
and (os.WEXITSTATUS(condition) == 0):
233
logger.debug(u"Checker for %(name)s succeeded",
234
vars(self))
235
self.last_seen = now
236
gobject.source_remove(self.stop_initiator_tag)
237
self.stop_initiator_tag = gobject.timeout_add\
238
(self._timeout_milliseconds,
239
self.stop)
240
elif not os.WIFEXITED(condition):
345
241
logger.warning(u"Checker for %(name)s crashed?",
346
242
vars(self))
347
if self.use_dbus:
348
# Emit D-Bus signal
349
self.CheckerCompleted(dbus.Int16(-1),
350
dbus.Int64(condition),
351
dbus.String(command))
352
353
def checked_ok(self):
354
"""Bump up the timeout for this client.
355
This should only be called when the client has been seen,
356
alive and well.
357
"""
358
self.last_checked_ok = datetime.datetime.utcnow()
359
gobject.source_remove(self.disable_initiator_tag)
360
self.disable_initiator_tag = (gobject.timeout_add
361
(self.timeout_milliseconds(),
362
self.disable))
363
if self.use_dbus:
364
# Emit D-Bus signal
365
self.PropertyChanged(
366
dbus.String(u"last_checked_ok"),
367
(_datetime_to_dbus(self.last_checked_ok,
368
variant_level=1)))
369
243
else:
244
logger.debug(u"Checker for %(name)s failed",
245
vars(self))
370
246
def start_checker(self):
371
247
"""Start a new checker subprocess if one is not running.
372
248
If a checker already exists, leave it running and do
381
257
# is as it should be.
382
258
if self.checker is None:
383
259
try:
384
# In case checker_command has exactly one % operator
385
command = self.checker_command % self.host
260
command = self.check_command % self.fqdn
386
261
except TypeError:
387
# Escape attributes for the shell
388
262
escaped_attrs = dict((key, re.escape(str(val)))
389
263
for key, val in
390
264
vars(self).iteritems())
391
265
try:
392
command = self.checker_command % escaped_attrs
266
command = self.check_command % escaped_attrs
393
267
except TypeError, error:
394
logger.error(u'Could not format string "%s":'
395
u' %s', self.checker_command, error)
268
logger.critical(u'Could not format string "%s":'
269
u' %s', self.check_command, error)
396
270
return True # Try again later
397
271
try:
398
logger.info(u"Starting checker %r for %s",
399
command, self.name)
400
# We don't need to redirect stdout and stderr, since
401
# in normal mode, that is already done by daemon(),
402
# and in debug mode we don't want to. (Stdin is
403
# always replaced by /dev/null.)
404
self.checker = subprocess.Popen(command,
405
close_fds=True,
406
shell=True, cwd="/")
407
if self.use_dbus:
408
# Emit D-Bus signal
409
self.CheckerStarted(command)
410
self.PropertyChanged(
411
dbus.String("checker_running"),
412
dbus.Boolean(True, variant_level=1))
413
self.checker_callback_tag = (gobject.child_watch_add
414
(self.checker.pid,
415
self.checker_callback,
416
data=command))
417
# The checker may have completed before the gobject
418
# watch was added. Check for this.
419
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
420
if pid:
421
gobject.source_remove(self.checker_callback_tag)
422
self.checker_callback(pid, status, command)
423
except OSError, error:
272
logger.debug(u"Starting checker %r for %s",
273
command, self.name)
274
self.checker = subprocess.\
275
Popen(command,
276
close_fds=True, shell=True,
277
cwd="/")
278
self.checker_callback_tag = gobject.child_watch_add\
279
(self.checker.pid,
280
self.checker_callback)
281
except subprocess.OSError, error:
424
282
logger.error(u"Failed to start subprocess: %s",
425
283
error)
426
284
# Re-run this periodically if run by gobject.timeout_add
427
285
return True
428
429
286
def stop_checker(self):
430
287
"""Force the checker process, if any, to stop."""
431
288
if self.checker_callback_tag:
432
289
gobject.source_remove(self.checker_callback_tag)
433
290
self.checker_callback_tag = None
434
if getattr(self, "checker", None) is None:
291
if not hasattr(self, "checker") or self.checker is None:
435
292
return
436
logger.debug(u"Stopping checker for %(name)s", vars(self))
293
logger.debug("Stopping checker for %(name)s", vars(self))
437
294
try:
438
295
os.kill(self.checker.pid, signal.SIGTERM)
439
296
#os.sleep(0.5)
440
297
#if self.checker.poll() is None:
441
298
# os.kill(self.checker.pid, signal.SIGKILL)
442
299
except OSError, error:
443
if error.errno != errno.ESRCH: # No such process
300
if error.errno != errno.ESRCH:
444
301
raise
445
302
self.checker = None
446
if self.use_dbus:
447
self.PropertyChanged(dbus.String(u"checker_running"),
448
dbus.Boolean(False, variant_level=1))
449
450
def still_valid(self):
303
def still_valid(self, now=None):
451
304
"""Has the timeout not yet passed for this client?"""
452
if not getattr(self, "enabled", False):
453
return False
454
now = datetime.datetime.utcnow()
455
if self.last_checked_ok is None:
305
if now is None:
306
now = datetime.datetime.now()
307
if self.last_seen is None:
456
308
return now < (self.created + self.timeout)
457
309
else:
458
return now < (self.last_checked_ok + self.timeout)
459
460
## D-Bus methods & signals
461
_interface = u"se.bsnet.fukt.Mandos.Client"
462
463
# CheckedOK - method
464
CheckedOK = dbus.service.method(_interface)(checked_ok)
465
CheckedOK.__name__ = "CheckedOK"
466
467
# CheckerCompleted - signal
468
@dbus.service.signal(_interface, signature="nxs")
469
def CheckerCompleted(self, exitcode, waitstatus, command):
470
"D-Bus signal"
471
pass
472
473
# CheckerStarted - signal
474
@dbus.service.signal(_interface, signature="s")
475
def CheckerStarted(self, command):
476
"D-Bus signal"
477
pass
478
479
# GetAllProperties - method
480
@dbus.service.method(_interface, out_signature="a{sv}")
481
def GetAllProperties(self):
482
"D-Bus method"
483
return dbus.Dictionary({
484
dbus.String("name"):
485
dbus.String(self.name, variant_level=1),
486
dbus.String("fingerprint"):
487
dbus.String(self.fingerprint, variant_level=1),
488
dbus.String("host"):
489
dbus.String(self.host, variant_level=1),
490
dbus.String("created"):
491
_datetime_to_dbus(self.created, variant_level=1),
492
dbus.String("last_enabled"):
493
(_datetime_to_dbus(self.last_enabled,
494
variant_level=1)
495
if self.last_enabled is not None
496
else dbus.Boolean(False, variant_level=1)),
497
dbus.String("enabled"):
498
dbus.Boolean(self.enabled, variant_level=1),
499
dbus.String("last_checked_ok"):
500
(_datetime_to_dbus(self.last_checked_ok,
501
variant_level=1)
502
if self.last_checked_ok is not None
503
else dbus.Boolean (False, variant_level=1)),
504
dbus.String("timeout"):
505
dbus.UInt64(self.timeout_milliseconds(),
506
variant_level=1),
507
dbus.String("interval"):
508
dbus.UInt64(self.interval_milliseconds(),
509
variant_level=1),
510
dbus.String("checker"):
511
dbus.String(self.checker_command,
512
variant_level=1),
513
dbus.String("checker_running"):
514
dbus.Boolean(self.checker is not None,
515
variant_level=1),
516
dbus.String("object_path"):
517
dbus.ObjectPath(self.dbus_object_path,
518
variant_level=1)
519
}, signature="sv")
520
521
# IsStillValid - method
522
IsStillValid = (dbus.service.method(_interface, out_signature="b")
523
(still_valid))
524
IsStillValid.__name__ = "IsStillValid"
525
526
# PropertyChanged - signal
527
@dbus.service.signal(_interface, signature="sv")
528
def PropertyChanged(self, property, value):
529
"D-Bus signal"
530
pass
531
532
# SetChecker - method
533
@dbus.service.method(_interface, in_signature="s")
534
def SetChecker(self, checker):
535
"D-Bus setter method"
536
self.checker_command = checker
537
# Emit D-Bus signal
538
self.PropertyChanged(dbus.String(u"checker"),
539
dbus.String(self.checker_command,
540
variant_level=1))
541
542
# SetHost - method
543
@dbus.service.method(_interface, in_signature="s")
544
def SetHost(self, host):
545
"D-Bus setter method"
546
self.host = host
547
# Emit D-Bus signal
548
self.PropertyChanged(dbus.String(u"host"),
549
dbus.String(self.host, variant_level=1))
550
551
# SetInterval - method
552
@dbus.service.method(_interface, in_signature="t")
553
def SetInterval(self, milliseconds):
554
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
555
# Emit D-Bus signal
556
self.PropertyChanged(dbus.String(u"interval"),
557
(dbus.UInt64(self.interval_milliseconds(),
558
variant_level=1)))
559
560
# SetSecret - method
561
@dbus.service.method(_interface, in_signature="ay",
562
byte_arrays=True)
563
def SetSecret(self, secret):
564
"D-Bus setter method"
565
self.secret = str(secret)
566
567
# SetTimeout - method
568
@dbus.service.method(_interface, in_signature="t")
569
def SetTimeout(self, milliseconds):
570
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
571
# Emit D-Bus signal
572
self.PropertyChanged(dbus.String(u"timeout"),
573
(dbus.UInt64(self.timeout_milliseconds(),
574
variant_level=1)))
575
576
# Enable - method
577
Enable = dbus.service.method(_interface)(enable)
578
Enable.__name__ = "Enable"
579
580
# StartChecker - method
581
@dbus.service.method(_interface)
582
def StartChecker(self):
583
"D-Bus method"
584
self.start_checker()
585
586
# Disable - method
587
@dbus.service.method(_interface)
588
def Disable(self):
589
"D-Bus method"
590
self.disable()
591
592
# StopChecker - method
593
StopChecker = dbus.service.method(_interface)(stop_checker)
594
StopChecker.__name__ = "StopChecker"
595
596
del _interface
310
return now < (self.last_seen + self.timeout)
597
311
598
312
599
313
def peer_certificate(session):
600
314
"Return the peer's OpenPGP certificate as a bytestring"
601
315
# If not an OpenPGP certificate...
602
if (gnutls.library.functions
603
.gnutls_certificate_type_get(session._c_object)
604
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
316
if gnutls.library.functions.gnutls_certificate_type_get\
317
(session._c_object) \
318
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
605
319
# ...do the normal thing
606
320
return session.peer_certificate
607
list_size = ctypes.c_uint(1)
608
cert_list = (gnutls.library.functions
609
.gnutls_certificate_get_peers
610
(session._c_object, ctypes.byref(list_size)))
611
if not bool(cert_list) and list_size.value != 0:
612
raise gnutls.errors.GNUTLSError("error getting peer"
613
" certificate")
321
list_size = ctypes.c_uint()
322
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
323
(session._c_object, ctypes.byref(list_size))
614
324
if list_size.value == 0:
615
325
return None
616
326
cert = cert_list[0]
619
329
620
330
def fingerprint(openpgp):
621
331
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
622
# New GnuTLS "datum" with the OpenPGP public key
623
datum = (gnutls.library.types
624
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
625
ctypes.POINTER
626
(ctypes.c_ubyte)),
627
ctypes.c_uint(len(openpgp))))
628
332
# New empty GnuTLS certificate
629
333
crt = gnutls.library.types.gnutls_openpgp_crt_t()
630
(gnutls.library.functions
631
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
334
gnutls.library.functions.gnutls_openpgp_crt_init\
335
(ctypes.byref(crt))
336
# New GnuTLS "datum" with the OpenPGP public key
337
datum = gnutls.library.types.gnutls_datum_t\
338
(ctypes.cast(ctypes.c_char_p(openpgp),
339
ctypes.POINTER(ctypes.c_ubyte)),
340
ctypes.c_uint(len(openpgp)))
632
341
# Import the OpenPGP public key into the certificate
633
(gnutls.library.functions
634
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
635
gnutls.library.constants
636
.GNUTLS_OPENPGP_FMT_RAW))
637
# Verify the self signature in the key
638
crtverify = ctypes.c_uint()
639
(gnutls.library.functions
640
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
641
if crtverify.value != 0:
642
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
643
raise gnutls.errors.CertificateSecurityError("Verify failed")
342
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
343
(crt,
344
ctypes.byref(datum),
345
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
644
346
# New buffer for the fingerprint
645
buf = ctypes.create_string_buffer(20)
646
buf_len = ctypes.c_size_t()
347
buffer = ctypes.create_string_buffer(20)
348
buffer_length = ctypes.c_size_t()
647
349
# Get the fingerprint from the certificate into the buffer
648
(gnutls.library.functions
649
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
650
ctypes.byref(buf_len)))
350
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
351
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
651
352
# Deinit the certificate
652
353
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
653
354
# Convert the buffer to a Python bytestring
654
fpr = ctypes.string_at(buf, buf_len.value)
355
fpr = ctypes.string_at(buffer, buffer_length.value)
655
356
# Convert the bytestring to hexadecimal notation
656
357
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
657
358
return hex_fpr
658
359
659
360
660
class TCP_handler(SocketServer.BaseRequestHandler, object):
361
class tcp_handler(SocketServer.BaseRequestHandler, object):
661
362
"""A TCP request handler class.
662
363
Instantiated by IPv6_TCPServer for each request to handle it.
663
364
Note: This will run in its own forked process."""
664
365
665
366
def handle(self):
666
logger.info(u"TCP connection from: %s",
667
unicode(self.client_address))
668
session = (gnutls.connection
669
.ClientSession(self.request,
670
gnutls.connection
671
.X509Credentials()))
672
673
line = self.request.makefile().readline()
674
logger.debug(u"Protocol version: %r", line)
675
try:
676
if int(line.strip().split()[0]) > 1:
677
raise RuntimeError
678
except (ValueError, IndexError, RuntimeError), error:
679
logger.error(u"Unknown protocol version: %s", error)
680
return
681
682
# Note: gnutls.connection.X509Credentials is really a generic
683
# GnuTLS certificate credentials object so long as no X.509
684
# keys are added to it. Therefore, we can use it here despite
685
# using OpenPGP certificates.
367
logger.debug(u"TCP connection from: %s",
368
unicode(self.client_address))
369
session = gnutls.connection.ClientSession(self.request,
370
gnutls.connection.\
371
X509Credentials())
686
372
687
373
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
688
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
689
# "+DHE-DSS"))
690
# Use a fallback default, since this MUST be set.
691
priority = self.server.settings.get("priority", "NORMAL")
692
(gnutls.library.functions
693
.gnutls_priority_set_direct(session._c_object,
694
priority, None))
374
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
375
# "+DHE-DSS"))
376
priority = "NORMAL"
377
if self.server.options.priority:
378
priority = self.server.options.priority
379
gnutls.library.functions.gnutls_priority_set_direct\
380
(session._c_object, priority, None);
695
381
696
382
try:
697
383
session.handshake()
698
384
except gnutls.errors.GNUTLSError, error:
699
logger.warning(u"Handshake failed: %s", error)
385
logger.debug(u"Handshake failed: %s", error)
700
386
# Do not run session.bye() here: the session is not
701
387
# established. Just abandon the request.
702
388
return
703
logger.debug(u"Handshake succeeded")
704
389
try:
705
390
fpr = fingerprint(peer_certificate(session))
706
391
except (TypeError, gnutls.errors.GNUTLSError), error:
707
logger.warning(u"Bad certificate: %s", error)
392
logger.debug(u"Bad certificate: %s", error)
708
393
session.bye()
709
394
return
710
395
logger.debug(u"Fingerprint: %s", fpr)
711
396
client = None
712
397
for c in self.server.clients:
713
398
if c.fingerprint == fpr:
714
399
client = c
715
400
break
716
else:
717
logger.warning(u"Client not found for fingerprint: %s",
718
fpr)
719
session.bye()
720
return
721
401
# Have to check if client.still_valid(), since it is possible
722
402
# that the client timed out while establishing the GnuTLS
723
403
# session.
724
if not client.still_valid():
725
logger.warning(u"Client %(name)s is invalid",
726
vars(client))
404
if (not client) or (not client.still_valid()):
405
if client:
406
logger.debug(u"Client %(name)s is invalid",
407
vars(client))
408
else:
409
logger.debug(u"Client not found for fingerprint: %s",
410
fpr)
727
411
session.bye()
728
412
return
729
## This won't work here, since we're in a fork.
730
# client.checked_ok()
731
413
sent_size = 0
732
414
while sent_size < len(client.secret):
733
415
sent = session.send(client.secret[sent_size:])
738
420
session.bye()
739
421
740
422
741
class IPv6_TCPServer(SocketServer.ForkingMixIn,
742
SocketServer.TCPServer, object):
743
"""IPv6-capable TCP server. Accepts 'None' as address and/or port.
423
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
424
"""IPv6 TCP server. Accepts 'None' as address and/or port.
744
425
Attributes:
745
settings: Server settings
426
options: Command line options
746
427
clients: Set() of Client objects
747
enabled: Boolean; whether this server is activated yet
748
428
"""
749
429
address_family = socket.AF_INET6
750
430
def __init__(self, *args, **kwargs):
751
if "settings" in kwargs:
752
self.settings = kwargs["settings"]
753
del kwargs["settings"]
431
if "options" in kwargs:
432
self.options = kwargs["options"]
433
del kwargs["options"]
754
434
if "clients" in kwargs:
755
435
self.clients = kwargs["clients"]
756
436
del kwargs["clients"]
757
if "use_ipv6" in kwargs:
758
if not kwargs["use_ipv6"]:
759
self.address_family = socket.AF_INET
760
del kwargs["use_ipv6"]
761
self.enabled = False
762
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
437
return super(type(self), self).__init__(*args, **kwargs)
763
438
def server_bind(self):
764
439
"""This overrides the normal server_bind() function
765
440
to bind to an interface if one was specified, and also NOT to
766
441
bind to an address or port if they were not specified."""
767
if self.settings["interface"]:
768
# 25 is from /usr/include/asm-i486/socket.h
769
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
442
if self.options.interface:
443
if not hasattr(socket, "SO_BINDTODEVICE"):
444
# From /usr/include/asm-i486/socket.h
445
socket.SO_BINDTODEVICE = 25
770
446
try:
771
447
self.socket.setsockopt(socket.SOL_SOCKET,
772
SO_BINDTODEVICE,
773
self.settings["interface"])
448
socket.SO_BINDTODEVICE,
449
self.options.interface)
774
450
except socket.error, error:
775
451
if error[0] == errno.EPERM:
776
logger.error(u"No permission to"
777
u" bind to interface %s",
778
self.settings["interface"])
452
logger.warning(u"No permission to"
453
u" bind to interface %s",
454
self.options.interface)
779
455
else:
780
raise
456
raise error
781
457
# Only bind(2) the socket if we really need to.
782
458
if self.server_address[0] or self.server_address[1]:
783
459
if not self.server_address[0]:
784
if self.address_family == socket.AF_INET6:
785
any_address = "::" # in6addr_any
786
else:
787
any_address = socket.INADDR_ANY
788
self.server_address = (any_address,
460
in6addr_any = "::"
461
self.server_address = (in6addr_any,
789
462
self.server_address[1])
790
elif not self.server_address[1]:
463
elif self.server_address[1] is None:
791
464
self.server_address = (self.server_address[0],
792
465
0)
793
# if self.settings["interface"]:
794
# self.server_address = (self.server_address[0],
795
# 0, # port
796
# 0, # flowinfo
797
# if_nametoindex
798
# (self.settings
799
# ["interface"]))
800
return super(IPv6_TCPServer, self).server_bind()
801
def server_activate(self):
802
if self.enabled:
803
return super(IPv6_TCPServer, self).server_activate()
804
def enable(self):
805
self.enabled = True
466
return super(type(self), self).server_bind()
806
467
807
468
808
469
def string_to_delta(interval):
809
470
"""Parse a string and return a datetime.timedelta
810
471
811
472
>>> string_to_delta('7d')
812
473
datetime.timedelta(7)
813
474
>>> string_to_delta('60s')
818
479
datetime.timedelta(1)
819
480
>>> string_to_delta(u'1w')
820
481
datetime.timedelta(7)
821
>>> string_to_delta('5m 30s')
822
datetime.timedelta(0, 330)
823
482
"""
824
timevalue = datetime.timedelta(0)
825
for s in interval.split():
826
try:
827
suffix = unicode(s[-1])
828
value = int(s[:-1])
829
if suffix == u"d":
830
delta = datetime.timedelta(value)
831
elif suffix == u"s":
832
delta = datetime.timedelta(0, value)
833
elif suffix == u"m":
834
delta = datetime.timedelta(0, 0, 0, 0, value)
835
elif suffix == u"h":
836
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
837
elif suffix == u"w":
838
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
839
else:
840
raise ValueError
841
except (ValueError, IndexError):
483
try:
484
suffix=unicode(interval[-1])
485
value=int(interval[:-1])
486
if suffix == u"d":
487
delta = datetime.timedelta(value)
488
elif suffix == u"s":
489
delta = datetime.timedelta(0, value)
490
elif suffix == u"m":
491
delta = datetime.timedelta(0, 0, 0, 0, value)
492
elif suffix == u"h":
493
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
494
elif suffix == u"w":
495
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
496
else:
842
497
raise ValueError
843
timevalue += delta
844
return timevalue
498
except (ValueError, IndexError):
499
raise ValueError
500
return delta
501
502
503
def add_service():
504
"""Derived from the Avahi example code"""
505
global group, serviceName, serviceType, servicePort, serviceTXT, \
506
domain, host
507
if group is None:
508
group = dbus.Interface(
509
bus.get_object( avahi.DBUS_NAME,
510
server.EntryGroupNew()),
511
avahi.DBUS_INTERFACE_ENTRY_GROUP)
512
group.connect_to_signal('StateChanged',
513
entry_group_state_changed)
514
logger.debug(u"Adding service '%s' of type '%s' ...",
515
serviceName, serviceType)
516
517
group.AddService(
518
serviceInterface, # interface
519
avahi.PROTO_INET6, # protocol
520
dbus.UInt32(0), # flags
521
serviceName, serviceType,
522
domain, host,
523
dbus.UInt16(servicePort),
524
avahi.string_array_to_txt_array(serviceTXT))
525
group.Commit()
526
527
528
def remove_service():
529
"""From the Avahi example code"""
530
global group
531
532
if not group is None:
533
group.Reset()
845
534
846
535
847
536
def server_state_changed(state):
848
537
"""Derived from the Avahi example code"""
849
538
if state == avahi.SERVER_COLLISION:
850
logger.error(u"Zeroconf server name collision")
851
service.remove()
539
logger.warning(u"Server name collision")
540
remove_service()
852
541
elif state == avahi.SERVER_RUNNING:
853
service.add()
542
add_service()
854
543
855
544
856
545
def entry_group_state_changed(state, error):
857
546
"""Derived from the Avahi example code"""
858
logger.debug(u"Avahi state change: %i", state)
547
global serviceName, server, rename_count
548
549
logger.debug(u"state change: %i", state)
859
550
860
551
if state == avahi.ENTRY_GROUP_ESTABLISHED:
861
logger.debug(u"Zeroconf service established.")
552
logger.debug(u"Service established.")
862
553
elif state == avahi.ENTRY_GROUP_COLLISION:
863
logger.warning(u"Zeroconf service name collision.")
864
service.rename()
554
555
rename_count = rename_count - 1
556
if rename_count > 0:
557
name = server.GetAlternativeServiceName(name)
558
logger.warning(u"Service name collision, "
559
u"changing name to '%s' ...", name)
560
remove_service()
561
add_service()
562
563
else:
564
logger.error(u"No suitable service name found after %i"
565
u" retries, exiting.", n_rename)
566
killme(1)
865
567
elif state == avahi.ENTRY_GROUP_FAILURE:
866
logger.critical(u"Avahi: Error in group state changed %s",
867
unicode(error))
868
raise AvahiGroupError(u"State changed: %s" % unicode(error))
568
logger.error(u"Error in group state changed %s",
569
unicode(error))
570
killme(1)
571
869
572
870
573
def if_nametoindex(interface):
871
"""Call the C function if_nametoindex(), or equivalent"""
872
global if_nametoindex
574
"""Call the C function if_nametoindex()"""
873
575
try:
874
if_nametoindex = (ctypes.cdll.LoadLibrary
875
(ctypes.util.find_library("c"))
876
.if_nametoindex)
576
libc = ctypes.cdll.LoadLibrary("libc.so.6")
577
return libc.if_nametoindex(interface)
877
578
except (OSError, AttributeError):
878
579
if "struct" not in sys.modules:
879
580
import struct
880
581
if "fcntl" not in sys.modules:
881
582
import fcntl
882
def if_nametoindex(interface):
883
"Get an interface index the hard way, i.e. using fcntl()"
884
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
885
with closing(socket.socket()) as s:
886
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
887
struct.pack("16s16x", interface))
888
interface_index = struct.unpack("I", ifreq[16:20])[0]
889
return interface_index
890
return if_nametoindex(interface)
891
892
893
def daemon(nochdir = False, noclose = False):
583
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
584
s = socket.socket()
585
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
586
struct.pack("16s16x", interface))
587
s.close()
588
interface_index = struct.unpack("I", ifreq[16:20])[0]
589
return interface_index
590
591
592
def daemon(nochdir, noclose):
894
593
"""See daemon(3). Standard BSD Unix function.
895
594
This should really exist as os.daemon, but it doesn't (yet)."""
896
595
if os.fork():
898
597
os.setsid()
899
598
if not nochdir:
900
599
os.chdir("/")
901
if os.fork():
902
sys.exit()
903
600
if not noclose:
904
601
# Close all standard open file descriptors
905
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
602
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
906
603
if not stat.S_ISCHR(os.fstat(null).st_mode):
907
604
raise OSError(errno.ENODEV,
908
605
"/dev/null not a character device")
913
610
os.close(null)
914
611
915
612
613
def killme(status = 0):
614
logger.debug("Stopping server with exit status %d", status)
615
exitstatus = status
616
if main_loop_started:
617
main_loop.quit()
618
else:
619
sys.exit(status)
620
621
916
622
def main():
917
parser = optparse.OptionParser(version = "%%prog %s" % version)
623
global exitstatus
624
exitstatus = 0
625
global main_loop_started
626
main_loop_started = False
627
628
parser = OptionParser()
918
629
parser.add_option("-i", "--interface", type="string",
919
metavar="IF", help="Bind to interface IF")
920
parser.add_option("-a", "--address", type="string",
630
default=None, metavar="IF",
631
help="Bind to interface IF")
632
parser.add_option("-a", "--address", type="string", default=None,
921
633
help="Address to listen for requests on")
922
parser.add_option("-p", "--port", type="int",
634
parser.add_option("-p", "--port", type="int", default=None,
923
635
help="Port number to receive requests on")
924
parser.add_option("--check", action="store_true",
636
parser.add_option("--check", action="store_true", default=False,
925
637
help="Run self-test")
926
parser.add_option("--debug", action="store_true",
927
help="Debug mode; run in foreground and log to"
928
" terminal")
929
parser.add_option("--priority", type="string", help="GnuTLS"
930
" priority string (see GnuTLS documentation)")
931
parser.add_option("--servicename", type="string", metavar="NAME",
932
help="Zeroconf service name")
933
parser.add_option("--configdir", type="string",
934
default="/etc/mandos", metavar="DIR",
935
help="Directory to search for configuration"
936
" files")
937
parser.add_option("--no-dbus", action="store_false",
938
dest="use_dbus",
939
help="Do not provide D-Bus system bus"
940
" interface")
941
parser.add_option("--no-ipv6", action="store_false",
942
dest="use_ipv6", help="Do not use IPv6")
943
options = parser.parse_args()[0]
638
parser.add_option("--debug", action="store_true", default=False,
639
help="Debug mode")
640
parser.add_option("--priority", type="string",
641
default="SECURE256",
642
help="GnuTLS priority string"
643
" (see GnuTLS documentation)")
644
parser.add_option("--servicename", type="string",
645
default="Mandos", help="Zeroconf service name")
646
(options, args) = parser.parse_args()
944
647
945
648
if options.check:
946
649
import doctest
947
650
doctest.testmod()
948
651
sys.exit()
949
652
950
# Default values for config file for server-global settings
951
server_defaults = { "interface": "",
952
"address": "",
953
"port": "",
954
"debug": "False",
955
"priority":
956
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
957
"servicename": "Mandos",
958
"use_dbus": "True",
959
"use_ipv6": "True",
960
}
961
962
# Parse config file for server-global settings
963
server_config = ConfigParser.SafeConfigParser(server_defaults)
964
del server_defaults
965
server_config.read(os.path.join(options.configdir, "mandos.conf"))
966
# Convert the SafeConfigParser object to a dict
967
server_settings = server_config.defaults()
968
# Use the appropriate methods on the non-string config options
969
server_settings["debug"] = server_config.getboolean("DEFAULT",
970
"debug")
971
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
972
"use_dbus")
973
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
974
"use_ipv6")
975
if server_settings["port"]:
976
server_settings["port"] = server_config.getint("DEFAULT",
977
"port")
978
del server_config
979
980
# Override the settings from the config file with command line
981
# options, if set.
982
for option in ("interface", "address", "port", "debug",
983
"priority", "servicename", "configdir",
984
"use_dbus", "use_ipv6"):
985
value = getattr(options, option)
986
if value is not None:
987
server_settings[option] = value
988
del options
989
# Now we have our good server settings in "server_settings"
990
991
# For convenience
992
debug = server_settings["debug"]
993
use_dbus = server_settings["use_dbus"]
994
use_ipv6 = server_settings["use_ipv6"]
995
996
if not debug:
997
syslogger.setLevel(logging.WARNING)
998
console.setLevel(logging.WARNING)
999
1000
if server_settings["servicename"] != "Mandos":
1001
syslogger.setFormatter(logging.Formatter
1002
('Mandos (%s): %%(levelname)s:'
1003
' %%(message)s'
1004
% server_settings["servicename"]))
1005
1006
# Parse config file with clients
1007
client_defaults = { "timeout": "1h",
1008
"interval": "5m",
1009
"checker": "fping -q -- %%(host)s",
1010
"host": "",
1011
}
1012
client_config = ConfigParser.SafeConfigParser(client_defaults)
1013
client_config.read(os.path.join(server_settings["configdir"],
1014
"clients.conf"))
1015
1016
clients = Set()
1017
tcp_server = IPv6_TCPServer((server_settings["address"],
1018
server_settings["port"]),
1019
TCP_handler,
1020
settings=server_settings,
1021
clients=clients, use_ipv6=use_ipv6)
1022
pidfilename = "/var/run/mandos.pid"
1023
try:
1024
pidfile = open(pidfilename, "w")
1025
except IOError:
1026
logger.error("Could not open file %r", pidfilename)
1027
1028
try:
1029
uid = pwd.getpwnam("_mandos").pw_uid
1030
gid = pwd.getpwnam("_mandos").pw_gid
1031
except KeyError:
1032
try:
1033
uid = pwd.getpwnam("mandos").pw_uid
1034
gid = pwd.getpwnam("mandos").pw_gid
1035
except KeyError:
1036
try:
1037
uid = pwd.getpwnam("nobody").pw_uid
1038
gid = pwd.getpwnam("nogroup").pw_gid
1039
except KeyError:
1040
uid = 65534
1041
gid = 65534
1042
try:
1043
os.setgid(gid)
1044
os.setuid(uid)
1045
except OSError, error:
1046
if error[0] != errno.EPERM:
1047
raise error
1048
1049
# Enable all possible GnuTLS debugging
1050
if debug:
1051
# "Use a log level over 10 to enable all debugging options."
1052
# - GnuTLS manual
1053
gnutls.library.functions.gnutls_global_set_log_level(11)
1054
1055
@gnutls.library.types.gnutls_log_func
1056
def debug_gnutls(level, string):
1057
logger.debug("GnuTLS: %s", string[:-1])
1058
1059
(gnutls.library.functions
1060
.gnutls_global_set_log_function(debug_gnutls))
1061
1062
global service
1063
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1064
service = AvahiService(name = server_settings["servicename"],
1065
servicetype = "_mandos._tcp",
1066
protocol = protocol)
1067
if server_settings["interface"]:
1068
service.interface = (if_nametoindex
1069
(server_settings["interface"]))
653
# Parse config file
654
defaults = { "timeout": "1h",
655
"interval": "5m",
656
"checker": "fping -q -- %%(fqdn)s",
657
}
658
client_config = ConfigParser.SafeConfigParser(defaults)
659
#client_config.readfp(open("global.conf"), "global.conf")
660
client_config.read("mandos-clients.conf")
661
662
global serviceName
663
serviceName = options.servicename;
1070
664
1071
665
global main_loop
1072
666
global bus
1075
669
DBusGMainLoop(set_as_default=True )
1076
670
main_loop = gobject.MainLoop()
1077
671
bus = dbus.SystemBus()
1078
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1079
avahi.DBUS_PATH_SERVER),
1080
avahi.DBUS_INTERFACE_SERVER)
672
server = dbus.Interface(
673
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
674
avahi.DBUS_INTERFACE_SERVER )
1081
675
# End of Avahi example code
1082
if use_dbus:
1083
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1084
1085
clients.update(Set(Client(name = section,
1086
config
1087
= dict(client_config.items(section)),
1088
use_dbus = use_dbus)
676
677
debug = options.debug
678
679
if debug:
680
console = logging.StreamHandler()
681
# console.setLevel(logging.DEBUG)
682
console.setFormatter(logging.Formatter\
683
('%(levelname)s: %(message)s'))
684
logger.addHandler(console)
685
del console
686
687
clients = Set()
688
def remove_from_clients(client):
689
clients.remove(client)
690
if not clients:
691
logger.debug(u"No clients left, exiting")
692
killme()
693
694
clients.update(Set(Client(name=section,
695
stop_hook = remove_from_clients,
696
**(dict(client_config\
697
.items(section))))
1089
698
for section in client_config.sections()))
1090
if not clients:
1091
logger.warning(u"No clients defined")
1092
1093
if debug:
1094
# Redirect stdin so all checkers get /dev/null
1095
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1096
os.dup2(null, sys.stdin.fileno())
1097
if null > 2:
1098
os.close(null)
1099
else:
1100
# No console logging
1101
logger.removeHandler(console)
1102
# Close all input and output, do double fork, etc.
1103
daemon()
1104
1105
try:
1106
pid = os.getpid()
1107
pidfile.write(str(pid) + "\n")
1108
pidfile.close()
1109
del pidfile
1110
except IOError:
1111
logger.error(u"Could not write to file %r with PID %d",
1112
pidfilename, pid)
1113
except NameError:
1114
# "pidfile" was never created
1115
pass
1116
del pidfilename
699
700
if not debug:
701
daemon(False, False)
1117
702
1118
703
def cleanup():
1119
704
"Cleanup function; run on exit"
1126
711
1127
712
while clients:
1128
713
client = clients.pop()
1129
client.disable_hook = None
1130
client.disable()
714
client.stop_hook = None
715
client.stop()
1131
716
1132
717
atexit.register(cleanup)
1133
718
1134
719
if not debug:
1135
720
signal.signal(signal.SIGINT, signal.SIG_IGN)
1136
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1137
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1138
1139
if use_dbus:
1140
class MandosServer(dbus.service.Object):
1141
"""A D-Bus proxy object"""
1142
def __init__(self):
1143
dbus.service.Object.__init__(self, bus, "/")
1144
_interface = u"se.bsnet.fukt.Mandos"
1145
1146
@dbus.service.signal(_interface, signature="oa{sv}")
1147
def ClientAdded(self, objpath, properties):
1148
"D-Bus signal"
1149
pass
1150
1151
@dbus.service.signal(_interface, signature="os")
1152
def ClientRemoved(self, objpath, name):
1153
"D-Bus signal"
1154
pass
1155
1156
@dbus.service.method(_interface, out_signature="ao")
1157
def GetAllClients(self):
1158
"D-Bus method"
1159
return dbus.Array(c.dbus_object_path for c in clients)
1160
1161
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1162
def GetAllClientsWithProperties(self):
1163
"D-Bus method"
1164
return dbus.Dictionary(
1165
((c.dbus_object_path, c.GetAllProperties())
1166
for c in clients),
1167
signature="oa{sv}")
1168
1169
@dbus.service.method(_interface, in_signature="o")
1170
def RemoveClient(self, object_path):
1171
"D-Bus method"
1172
for c in clients:
1173
if c.dbus_object_path == object_path:
1174
clients.remove(c)
1175
# Don't signal anything except ClientRemoved
1176
c.use_dbus = False
1177
c.disable()
1178
# Emit D-Bus signal
1179
self.ClientRemoved(object_path, c.name)
1180
return
1181
raise KeyError
1182
1183
del _interface
1184
1185
mandos_server = MandosServer()
721
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
722
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
1186
723
1187
724
for client in clients:
1188
if use_dbus:
1189
# Emit D-Bus signal
1190
mandos_server.ClientAdded(client.dbus_object_path,
1191
client.GetAllProperties())
1192
client.enable()
1193
1194
tcp_server.enable()
1195
tcp_server.server_activate()
1196
1197
# Find out what port we got
1198
service.port = tcp_server.socket.getsockname()[1]
1199
if use_ipv6:
1200
logger.info(u"Now listening on address %r, port %d,"
1201
" flowinfo %d, scope_id %d"
1202
% tcp_server.socket.getsockname())
1203
else: # IPv4
1204
logger.info(u"Now listening on address %r, port %d"
1205
% tcp_server.socket.getsockname())
1206
1207
#service.interface = tcp_server.socket.getsockname()[3]
1208
1209
try:
1210
# From the Avahi example code
1211
server.connect_to_signal("StateChanged", server_state_changed)
1212
try:
1213
server_state_changed(server.GetState())
1214
except dbus.exceptions.DBusException, error:
1215
logger.critical(u"DBusException: %s", error)
1216
sys.exit(1)
1217
# End of Avahi example code
1218
1219
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1220
lambda *args, **kwargs:
1221
(tcp_server.handle_request
1222
(*args[2:], **kwargs) or True))
1223
1224
logger.debug(u"Starting main loop")
725
client.start()
726
727
tcp_server = IPv6_TCPServer((options.address, options.port),
728
tcp_handler,
729
options=options,
730
clients=clients)
731
# Find out what random port we got
732
global servicePort
733
servicePort = tcp_server.socket.getsockname()[1]
734
logger.debug(u"Now listening on port %d", servicePort)
735
736
if options.interface is not None:
737
global serviceInterface
738
serviceInterface = if_nametoindex(options.interface)
739
740
# From the Avahi example code
741
server.connect_to_signal("StateChanged", server_state_changed)
742
try:
743
server_state_changed(server.GetState())
744
except dbus.exceptions.DBusException, error:
745
logger.critical(u"DBusException: %s", error)
746
killme(1)
747
# End of Avahi example code
748
749
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
750
lambda *args, **kwargs:
751
tcp_server.handle_request(*args[2:],
752
**kwargs) or True)
753
try:
754
logger.debug("Starting main loop")
755
main_loop_started = True
1225
756
main_loop.run()
1226
except AvahiError, error:
1227
logger.critical(u"AvahiError: %s", error)
1228
sys.exit(1)
1229
757
except KeyboardInterrupt:
1230
758
if debug:
1231
print >> sys.stderr
1232
logger.debug("Server received KeyboardInterrupt")
1233
logger.debug("Server exiting")
759
print
760
761
sys.exit(exitstatus)
1234
762
1235
763
if __name__ == '__main__':
1236
764
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0