/mandos/trunk : revision 633

11

# "AvahiService" class, and some lines in "main".

12

#

13

# Everything else is

14

15

14

15

16

#

17

# This program is free software: you can redistribute it and/or modify

18

# it under the terms of the GNU General Public License as published by

68

import binascii

69

import tempfile

70

import itertools

71

import collections

71

72

73

import dbus

73

74

import dbus.service

78

79

import ctypes.util

79

80

import xml.dom.minidom

80

81

import inspect

81

import GnuPGInterface

82

83

try:

84

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

88

except ImportError:

89

SO_BINDTODEVICE = None

90

91

version = "1.5.3"

91

version = "1.6.1"

92

stored_state_file = "clients.pickle"

93

94

logger = logging.getLogger()

139

class PGPEngine(object):

140

"""A simple class for OpenPGP symmetric encryption & decryption"""

141

def __init__(self):

142

self.gnupg = GnuPGInterface.GnuPG()

143

142

self.tempdir = tempfile.mkdtemp(prefix="mandos-")

144

self.gnupg = GnuPGInterface.GnuPG()

145

self.gnupg.options.meta_interactive = False

146

self.gnupg.options.homedir = self.tempdir

147

self.gnupg.options.extra_args.extend(['--force-mdc',

148

'--quiet',

149

'--no-use-agent'])

143

self.gnupgargs = ['--batch',

144

'--home', self.tempdir,

145

'--force-mdc',

146

'--quiet',

147

'--no-use-agent']

150

148

151

149

def __enter__(self):

152

150

return self

153

151

154

def __exit__ (self, exc_type, exc_value, traceback):

152

def __exit__(self, exc_type, exc_value, traceback):

155

153

self._cleanup()

156

154

return False

157

155

174

172

def password_encode(self, password):

175

173

# Passphrase can not be empty and can not contain newlines or

176

174

# NUL bytes. So we prefix it and hex encode it.

177

return b"mandos" + binascii.hexlify(password)

175

encoded = b"mandos" + binascii.hexlify(password)

176

if len(encoded) > 2048:

177

# GnuPG can't handle long passwords, so encode differently

178

encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

179

.replace(b"\n", b"\\n")

180

.replace(b"\0", b"\\x00"))

181

return encoded

178

182

179

183

def encrypt(self, data, password):

180

self.gnupg.passphrase = self.password_encode(password)

181

with open(os.devnull, "w") as devnull:

182

try:

183

proc = self.gnupg.run(['--symmetric'],

184

create_fhs=['stdin', 'stdout'],

185

attach_fhs={'stderr': devnull})

186

with contextlib.closing(proc.handles['stdin']) as f:

187

f.write(data)

188

with contextlib.closing(proc.handles['stdout']) as f:

189

ciphertext = f.read()

190

proc.wait()

191

except IOError as e:

192

raise PGPError(e)

193

self.gnupg.passphrase = None

184

passphrase = self.password_encode(password)

185

with tempfile.NamedTemporaryFile(dir=self.tempdir

186

) as passfile:

187

passfile.write(passphrase)

188

passfile.flush()

189

proc = subprocess.Popen(['gpg', '--symmetric',

190

'--passphrase-file',

191

passfile.name]

192

+ self.gnupgargs,

193

stdin = subprocess.PIPE,

194

stdout = subprocess.PIPE,

195

stderr = subprocess.PIPE)

196

ciphertext, err = proc.communicate(input = data)

197

if proc.returncode != 0:

198

raise PGPError(err)

194

199

return ciphertext

195

200

196

201

def decrypt(self, data, password):

197

self.gnupg.passphrase = self.password_encode(password)

198

with open(os.devnull, "w") as devnull:

199

try:

200

proc = self.gnupg.run(['--decrypt'],

201

create_fhs=['stdin', 'stdout'],

202

attach_fhs={'stderr': devnull})

203

with contextlib.closing(proc.handles['stdin']) as f:

204

f.write(data)

205

with contextlib.closing(proc.handles['stdout']) as f:

206

decrypted_plaintext = f.read()

207

proc.wait()

208

except IOError as e:

209

raise PGPError(e)

210

self.gnupg.passphrase = None

202

passphrase = self.password_encode(password)

203

with tempfile.NamedTemporaryFile(dir = self.tempdir

204

) as passfile:

205

passfile.write(passphrase)

206

passfile.flush()

207

proc = subprocess.Popen(['gpg', '--decrypt',

208

'--passphrase-file',

209

passfile.name]

210

+ self.gnupgargs,

211

stdin = subprocess.PIPE,

212

stdout = subprocess.PIPE,

213

stderr = subprocess.PIPE)

214

decrypted_plaintext, err = proc.communicate(input

215

= data)

216

if proc.returncode != 0:

217

raise PGPError(err)

211

218

return decrypted_plaintext

212

219

213

220

233

240

Used to optionally bind to the specified interface.

234

241

name: string; Example: 'Mandos'

235

242

type: string; Example: '_mandos._tcp'.

236

See <http://www.dns-sd.org/ServiceTypes.html>

243

See <https://www.iana.org/assignments/service-names-port-numbers>

237

244

port: integer; what port to announce

238

245

TXT: list of strings; TXT record for the service

239

246

domain: string; Domain to publish on, default to .local if empty.

379

386

self.server_state_changed)

380

387

self.server_state_changed(self.server.GetState())

381

388

389

382

390

class AvahiServiceToSyslog(AvahiService):

383

391

def rename(self):

384

392

"""Add the new name to the syslog messages"""

389

397

.format(self.name)))

390

398

return ret

391

399

400

392

401

def timedelta_to_milliseconds(td):

393

402

"Convert a datetime.timedelta() to milliseconds"

394

403

return ((td.days * 24 * 60 * 60 * 1000)

395

404

+ (td.seconds * 1000)

396

405

+ (td.microseconds // 1000))

397

406

407

398

408

class Client(object):

399

409

"""A representation of a client host served by this server.

400

410

436

446

runtime_expansions: Allowed attributes for runtime expansion.

437

447

expires: datetime.datetime(); time (UTC) when a client will be

438

448

disabled, or None

449

server_settings: The server_settings dict from main()

439

450

"""

440

451

441

452

runtime_expansions = ("approval_delay", "approval_duration",

442

"created", "enabled", "fingerprint",

443

"host", "interval", "last_checked_ok",

453

"created", "enabled", "expires",

454

"fingerprint", "host", "interval",

455

"last_approval_request", "last_checked_ok",

444

456

"last_enabled", "name", "timeout")

445

client_defaults = { "timeout": "5m",

446

"extended_timeout": "15m",

447

"interval": "2m",

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

448

460

"checker": "fping -q -- %%(host)s",

449

461

"host": "",

450

"approval_delay": "0s",

451

"approval_duration": "1s",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

452

464

"approved_by_default": "True",

453

465

"enabled": "True",

454

466

}

515

527

516

528

return settings

517

529

518

def __init__(self, settings, name = None):

530

def __init__(self, settings, name = None, server_settings=None):

519

531

self.name = name

532

if server_settings is None:

533

server_settings = {}

534

self.server_settings = server_settings

520

535

# adding all client settings

521

536

for setting, value in settings.iteritems():

522

537

setattr(self, setting, value)

572

587

if getattr(self, "enabled", False):

573

588

# Already enabled

574

589

return

575

self.send_changedstate()

576

590

self.expires = datetime.datetime.utcnow() + self.timeout

577

591

self.enabled = True

578

592

self.last_enabled = datetime.datetime.utcnow()

579

593

self.init_checker()

594

self.send_changedstate()

580

595

581

596

def disable(self, quiet=True):

582

597

"""Disable this client."""

583

598

if not getattr(self, "enabled", False):

584

599

return False

585

600

if not quiet:

586

self.send_changedstate()

587

if not quiet:

588

601

logger.info("Disabling client %s", self.name)

589

if getattr(self, "disable_initiator_tag", False):

602

if getattr(self, "disable_initiator_tag", None) is not None:

590

603

gobject.source_remove(self.disable_initiator_tag)

591

604

self.disable_initiator_tag = None

592

605

self.expires = None

593

if getattr(self, "checker_initiator_tag", False):

606

if getattr(self, "checker_initiator_tag", None) is not None:

594

607

gobject.source_remove(self.checker_initiator_tag)

595

608

self.checker_initiator_tag = None

596

609

self.stop_checker()

597

610

self.enabled = False

611

if not quiet:

612

self.send_changedstate()

598

613

# Do not run this again if called by a gobject.timeout_add

599

614

return False

600

615

604

619

def init_checker(self):

605

620

# Schedule a new checker to be started an 'interval' from now,

606

621

# and every interval from then on.

622

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

607

624

self.checker_initiator_tag = (gobject.timeout_add

608

625

(self.interval_milliseconds(),

609

626

self.start_checker))

610

627

# Schedule a disable() when 'timeout' has passed

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

611

630

self.disable_initiator_tag = (gobject.timeout_add

612

631

(self.timeout_milliseconds(),

613

632

self.disable))

644

663

timeout = self.timeout

645

664

if self.disable_initiator_tag is not None:

646

665

gobject.source_remove(self.disable_initiator_tag)

666

self.disable_initiator_tag = None

647

667

if getattr(self, "enabled", False):

648

668

self.disable_initiator_tag = (gobject.timeout_add

649

669

(timedelta_to_milliseconds

682

702

self.current_checker_command)

683

703

# Start a new checker if needed

684

704

if self.checker is None:

705

# Escape attributes for the shell

706

escaped_attrs = dict(

707

(attr, re.escape(unicode(getattr(self, attr))))

708

for attr in

709

self.runtime_expansions)

685

710

try:

686

# In case checker_command has exactly one % operator

687

command = self.checker_command % self.host

688

except TypeError:

689

# Escape attributes for the shell

690

escaped_attrs = dict(

691

(attr,

692

re.escape(unicode(str(getattr(self, attr, "")),

693

errors=

694

'replace')))

695

for attr in

696

self.runtime_expansions)

697

698

try:

699

command = self.checker_command % escaped_attrs

700

except TypeError as error:

701

logger.error('Could not format string "%s"',

702

self.checker_command, exc_info=error)

703

return True # Try again later

711

command = self.checker_command % escaped_attrs

712

except TypeError as error:

713

logger.error('Could not format string "%s"',

714

self.checker_command, exc_info=error)

715

return True # Try again later

704

716

self.current_checker_command = command

705

717

try:

706

718

logger.info("Starting checker %r for %s",

709

721

# in normal mode, that is already done by daemon(),

710

722

# and in debug mode we don't want to. (Stdin is

711

723

# always replaced by /dev/null.)

724

# The exception is when not debugging but nevertheless

725

# running in the foreground; use the previously

726

# created wnull.

727

popen_args = {}

728

if (not self.server_settings["debug"]

729

and self.server_settings["foreground"]):

730

popen_args.update({"stdout": wnull,

731

"stderr": wnull })

712

732

self.checker = subprocess.Popen(command,

713

733

close_fds=True,

714

shell=True, cwd="/")

715

self.checker_callback_tag = (gobject.child_watch_add

716

(self.checker.pid,

717

self.checker_callback,

718

data=command))

719

# The checker may have completed before the gobject

720

# watch was added. Check for this.

721

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

722

if pid:

723

gobject.source_remove(self.checker_callback_tag)

724

self.checker_callback(pid, status, command)

734

shell=True, cwd="/",

735

**popen_args)

725

736

except OSError as error:

726

737

logger.error("Failed to start subprocess",

727

738

exc_info=error)

739

return True

740

self.checker_callback_tag = (gobject.child_watch_add

741

(self.checker.pid,

742

self.checker_callback,

743

data=command))

744

# The checker may have completed before the gobject

745

# watch was added. Check for this.

746

try:

747

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

748

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

757

self.checker_callback(pid, status, command)

728

758

# Re-run this periodically if run by gobject.timeout_add

729

759

return True

730

760

1015

1045

return xmlstring

1016

1046

1017

1047

1018

def datetime_to_dbus (dt, variant_level=0):

1048

def datetime_to_dbus(dt, variant_level=0):

1019

1049

"""Convert a UTC datetime.datetime() to a D-Bus type."""

1020

1050

if dt is None:

1021

1051

return dbus.String("", variant_level = variant_level)

1029

1059

interface names according to the "alt_interface_names" mapping.

1030

1060

Usage:

1031

1061

1032

@alternate_dbus_names({"org.example.Interface":

1033

"net.example.AlternateInterface"})

1062

@alternate_dbus_interfaces({"org.example.Interface":

1063

"net.example.AlternateInterface"})

1034

1064

class SampleDBusObject(dbus.service.Object):

1035

1065

@dbus.service.method("org.example.Interface")

1036

1066

def SampleDBusMethod():

1067

1097

interface_names.add(alt_interface)

1068

1098

# Is this a D-Bus signal?

1069

1099

if getattr(attribute, "_dbus_is_signal", False):

1070

# Extract the original non-method function by

1071

# black magic

1100

# Extract the original non-method undecorated

1101

# function by black magic

1072

1102

nonmethod_func = (dict(

1073

1103

zip(attribute.func_code.co_freevars,

1074

1104

attribute.__closure__))["func"]

1335

1365

return False

1336

1366

1337

1367

def approve(self, value=True):

1338

self.send_changedstate()

1339

1368

self.approved = value

1340

1369

gobject.timeout_add(timedelta_to_milliseconds

1341

1370

(self.approval_duration),

1342

1371

self._reset_approved)

1372

self.send_changedstate()

1343

1373

1344

1374

## D-Bus methods, signals & properties

1345

1375

_interface = "se.recompile.Mandos.Client"

1529

1559

def Timeout_dbus_property(self, value=None):

1530

1560

if value is None: # get

1531

1561

return dbus.UInt64(self.timeout_milliseconds())

1562

old_timeout = self.timeout

1532

1563

self.timeout = datetime.timedelta(0, 0, 0, value)

1533

# Reschedule timeout

1564

# Reschedule disabling

1534

1565

if self.enabled:

1535

1566

now = datetime.datetime.utcnow()

1536

time_to_die = timedelta_to_milliseconds(

1537

(self.last_checked_ok + self.timeout) - now)

1538

if time_to_die <= 0:

1567

self.expires += self.timeout - old_timeout

1568

if self.expires <= now:

1539

1569

# The timeout has passed

1540

1570

self.disable()

1541

1571

else:

1542

self.expires = (now +

1543

datetime.timedelta(milliseconds =

1544

time_to_die))

1545

1572

if (getattr(self, "disable_initiator_tag", None)

1546

1573

is None):

1547

1574

return

1548

1575

gobject.source_remove(self.disable_initiator_tag)

1549

self.disable_initiator_tag = (gobject.timeout_add

1550

(time_to_die,

1551

self.disable))

1576

self.disable_initiator_tag = (

1577

gobject.timeout_add(

1578

timedelta_to_milliseconds(self.expires - now),

1579

self.disable))

1552

1580

1553

1581

# ExtendedTimeout - property

1554

1582

@dbus_service_property(_interface, signature="t",

1742

1770

#wait until timeout or approved

1743

1771

time = datetime.datetime.now()

1744

1772

client.changedstate.acquire()

1745

(client.changedstate.wait

1746

(float(client.timedelta_to_milliseconds(delay)

1747

/ 1000)))

1773

client.changedstate.wait(

1774

float(timedelta_to_milliseconds(delay)

1775

/ 1000))

1748

1776

client.changedstate.release()

1749

1777

time2 = datetime.datetime.now()

1750

1778

if (time2 - time) >= delay:

1900

1928

use_ipv6: Boolean; to use IPv6 or not

1901

1929

"""

1902

1930

def __init__(self, server_address, RequestHandlerClass,

1903

interface=None, use_ipv6=True):

1931

interface=None, use_ipv6=True, socketfd=None):

1932

"""If socketfd is set, use that file descriptor instead of

1933

creating a new one with socket.socket().

1934

"""

1904

1935

self.interface = interface

1905

1936

if use_ipv6:

1906

1937

self.address_family = socket.AF_INET6

1938

if socketfd is not None:

1939

# Save the file descriptor

1940

self.socketfd = socketfd

1941

# Save the original socket.socket() function

1942

self.socket_socket = socket.socket

1943

# To implement --socket, we monkey patch socket.socket.

1944

#

1945

# (When socketserver.TCPServer is a new-style class, we

1946

# could make self.socket into a property instead of monkey

1947

# patching socket.socket.)

1948

#

1949

# Create a one-time-only replacement for socket.socket()

1950

@functools.wraps(socket.socket)

1951

def socket_wrapper(*args, **kwargs):

1952

# Restore original function so subsequent calls are

1953

# not affected.

1954

socket.socket = self.socket_socket

1955

del self.socket_socket

1956

# This time only, return a new socket object from the

1957

# saved file descriptor.

1958

return socket.fromfd(self.socketfd, *args, **kwargs)

1959

# Replace socket.socket() function with wrapper

1960

socket.socket = socket_wrapper

1961

# The socketserver.TCPServer.__init__ will call

1962

# socket.socket(), which might be our replacement,

1963

# socket_wrapper(), if socketfd was set.

1907

1964

socketserver.TCPServer.__init__(self, server_address,

1908

1965

RequestHandlerClass)

1966

1909

1967

def server_bind(self):

1910

1968

"""This overrides the normal server_bind() function

1911

1969

to bind to an interface if one was specified, and also NOT to

1919

1977

try:

1920

1978

self.socket.setsockopt(socket.SOL_SOCKET,

1921

1979

SO_BINDTODEVICE,

1922

str(self.interface

1923

+ '\0'))

1980

str(self.interface + '\0'))

1924

1981

except socket.error as error:

1925

if error[0] == errno.EPERM:

1926

logger.error("No permission to"

1927

" bind to interface %s",

1928

self.interface)

1929

elif error[0] == errno.ENOPROTOOPT:

1982

if error.errno == errno.EPERM:

1983

logger.error("No permission to bind to"

1984

" interface %s", self.interface)

1985

elif error.errno == errno.ENOPROTOOPT:

1930

1986

logger.error("SO_BINDTODEVICE not available;"

1931

1987

" cannot bind to interface %s",

1932

1988

self.interface)

1989

elif error.errno == errno.ENODEV:

1990

logger.error("Interface %s does not exist,"

1991

" cannot bind", self.interface)

1933

1992

else:

1934

1993

raise

1935

1994

# Only bind(2) the socket if we really need to.

1938

1997

if self.address_family == socket.AF_INET6:

1939

1998

any_address = "::" # in6addr_any

1940

1999

else:

1941

any_address = socket.INADDR_ANY

2000

any_address = "0.0.0.0" # INADDR_ANY

1942

2001

self.server_address = (any_address,

1943

2002

self.server_address[1])

1944

2003

elif not self.server_address[1]:

1965

2024

"""

1966

2025

def __init__(self, server_address, RequestHandlerClass,

1967

2026

interface=None, use_ipv6=True, clients=None,

1968

gnutls_priority=None, use_dbus=True):

2027

gnutls_priority=None, use_dbus=True, socketfd=None):

1969

2028

self.enabled = False

1970

2029

self.clients = clients

1971

2030

if self.clients is None:

1975

2034

IPv6_TCPServer.__init__(self, server_address,

1976

2035

RequestHandlerClass,

1977

2036

interface = interface,

1978

use_ipv6 = use_ipv6)

2037

use_ipv6 = use_ipv6,

2038

socketfd = socketfd)

1979

2039

def server_activate(self):

1980

2040

if self.enabled:

1981

2041

return socketserver.TCPServer.server_activate(self)

2059

2119

return True

2060

2120

2061

2121

2122

def rfc3339_duration_to_delta(duration):

2123

"""Parse an RFC 3339 "duration" and return a datetime.timedelta

2124

2125

>>> rfc3339_duration_to_delta("P7D")

2126

datetime.timedelta(7)

2127

>>> rfc3339_duration_to_delta("PT60S")

2128

datetime.timedelta(0, 60)

2129

>>> rfc3339_duration_to_delta("PT60M")

2130

datetime.timedelta(0, 3600)

2131

>>> rfc3339_duration_to_delta("PT24H")

2132

datetime.timedelta(1)

2133

>>> rfc3339_duration_to_delta("P1W")

2134

datetime.timedelta(7)

2135

>>> rfc3339_duration_to_delta("PT5M30S")

2136

datetime.timedelta(0, 330)

2137

>>> rfc3339_duration_to_delta("P1DT3M20S")

2138

datetime.timedelta(1, 200)

2139

"""

2140

2141

# Parsing an RFC 3339 duration with regular expressions is not

2142

# possible - there would have to be multiple places for the same

2143

# values, like seconds. The current code, while more esoteric, is

2144

# cleaner without depending on a parsing library. If Python had a

2145

# built-in library for parsing we would use it, but we'd like to

2146

# avoid excessive use of external libraries.

2147

2148

# New type for defining tokens, syntax, and semantics all-in-one

2149

Token = collections.namedtuple("Token",

2150

("regexp", # To match token; if

2151

# "value" is not None,

2152

# must have a "group"

2153

# containing digits

2154

"value", # datetime.timedelta or

2155

# None

2156

"followers")) # Tokens valid after

2157

# this token

2158

# RFC 3339 "duration" tokens, syntax, and semantics; taken from

2159

# the "duration" ABNF definition in RFC 3339, Appendix A.

2160

token_end = Token(re.compile(r"$"), None, frozenset())

2161

token_second = Token(re.compile(r"(\d+)S"),

2162

datetime.timedelta(seconds=1),

2163

frozenset((token_end,)))

2164

token_minute = Token(re.compile(r"(\d+)M"),

2165

datetime.timedelta(minutes=1),

2166

frozenset((token_second, token_end)))

2167

token_hour = Token(re.compile(r"(\d+)H"),

2168

datetime.timedelta(hours=1),

2169

frozenset((token_minute, token_end)))

2170

token_time = Token(re.compile(r"T"),

2171

None,

2172

frozenset((token_hour, token_minute,

2173

token_second)))

2174

token_day = Token(re.compile(r"(\d+)D"),

2175

datetime.timedelta(days=1),

2176

frozenset((token_time, token_end)))

2177

token_month = Token(re.compile(r"(\d+)M"),

2178

datetime.timedelta(weeks=4),

2179

frozenset((token_day, token_end)))

2180

token_year = Token(re.compile(r"(\d+)Y"),

2181

datetime.timedelta(weeks=52),

2182

frozenset((token_month, token_end)))

2183

token_week = Token(re.compile(r"(\d+)W"),

2184

datetime.timedelta(weeks=1),

2185

frozenset((token_end,)))

2186

token_duration = Token(re.compile(r"P"), None,

2187

frozenset((token_year, token_month,

2188

token_day, token_time,

2189

token_week))),

2190

# Define starting values

2191

value = datetime.timedelta() # Value so far

2192

found_token = None

2193

followers = frozenset(token_duration,) # Following valid tokens

2194

s = duration # String left to parse

2195

# Loop until end token is found

2196

while found_token is not token_end:

2197

# Search for any currently valid tokens

2198

for token in followers:

2199

match = token.regexp.match(s)

2200

if match is not None:

2201

# Token found

2202

if token.value is not None:

2203

# Value found, parse digits

2204

factor = int(match.group(1), 10)

2205

# Add to value so far

2206

value += factor * token.value

2207

# Strip token from string

2208

s = token.regexp.sub("", s, 1)

2209

# Go to found token

2210

found_token = token

2211

# Set valid next tokens

2212

followers = found_token.followers

2213

break

2214

else:

2215

# No currently valid tokens were found

2216

raise ValueError("Invalid RFC 3339 duration")

2217

# End token found

2218

return value

2219

2220

2062

2221

def string_to_delta(interval):

2063

2222

"""Parse a string and return a datetime.timedelta

2064

2223

2075

2234

>>> string_to_delta('5m 30s')

2076

2235

datetime.timedelta(0, 330)

2077

2236

"""

2237

2238

try:

2239

return rfc3339_duration_to_delta(interval)

2240

except ValueError:

2241

pass

2242

2078

2243

timevalue = datetime.timedelta(0)

2079

2244

for s in interval.split():

2080

2245

try:

2143

2308

help="Run self-test")

2144

2309

parser.add_argument("--debug", action="store_true",

2145

2310

help="Debug mode; run in foreground and log"

2146

" to terminal")

2311

" to terminal", default=None)

2147

2312

parser.add_argument("--debuglevel", metavar="LEVEL",

2148

2313

help="Debug level for stdout output")

2149

2314

parser.add_argument("--priority", help="GnuTLS"

2156

2321

" files")

2157

2322

parser.add_argument("--no-dbus", action="store_false",

2158

2323

dest="use_dbus", help="Do not provide D-Bus"

2159

" system bus interface")

2324

" system bus interface", default=None)

2160

2325

parser.add_argument("--no-ipv6", action="store_false",

2161

dest="use_ipv6", help="Do not use IPv6")

2326

dest="use_ipv6", help="Do not use IPv6",

2327

default=None)

2162

2328

parser.add_argument("--no-restore", action="store_false",

2163

2329

dest="restore", help="Do not restore stored"

2164

" state")

2330

" state", default=None)

2331

parser.add_argument("--socket", type=int,

2332

help="Specify a file descriptor to a network"

2333

" socket to use instead of creating one")

2165

2334

parser.add_argument("--statedir", metavar="DIR",

2166

2335

help="Directory to save/restore state in")

2336

parser.add_argument("--foreground", action="store_true",

2337

help="Run in foreground", default=None)

2167

2338

2168

2339

options = parser.parse_args()

2169

2340

2178

2349

"port": "",

2179

2350

"debug": "False",

2180

2351

"priority":

2181

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",

2352

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2182

2353

"servicename": "Mandos",

2183

2354

"use_dbus": "True",

2184

2355

"use_ipv6": "True",

2185

2356

"debuglevel": "",

2186

2357

"restore": "True",

2187

"statedir": "/var/lib/mandos"

2358

"socket": "",

2359

"statedir": "/var/lib/mandos",

2360

"foreground": "False",

2188

2361

}

2189

2362

2190

2363

# Parse config file for server-global settings

2195

2368

# Convert the SafeConfigParser object to a dict

2196

2369

server_settings = server_config.defaults()

2197

2370

# Use the appropriate methods on the non-string config options

2198

for option in ("debug", "use_dbus", "use_ipv6"):

2371

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

2199

2372

server_settings[option] = server_config.getboolean("DEFAULT",

2200

2373

option)

2201

2374

if server_settings["port"]:

2202

2375

server_settings["port"] = server_config.getint("DEFAULT",

2203

2376

"port")

2377

if server_settings["socket"]:

2378

server_settings["socket"] = server_config.getint("DEFAULT",

2379

"socket")

2380

# Later, stdin will, and stdout and stderr might, be dup'ed

2381

# over with an opened os.devnull. But we don't want this to

2382

# happen with a supplied network socket.

2383

if 0 <= server_settings["socket"] <= 2:

2384

server_settings["socket"] = os.dup(server_settings

2385

["socket"])

2204

2386

del server_config

2205

2387

2206

2388

# Override the settings from the config file with command line

2208

2390

for option in ("interface", "address", "port", "debug",

2209

2391

"priority", "servicename", "configdir",

2210

2392

"use_dbus", "use_ipv6", "debuglevel", "restore",

2211

"statedir"):

2393

"statedir", "socket", "foreground"):

2212

2394

value = getattr(options, option)

2213

2395

if value is not None:

2214

2396

server_settings[option] = value

2217

2399

for option in server_settings.keys():

2218

2400

if type(server_settings[option]) is str:

2219

2401

server_settings[option] = unicode(server_settings[option])

2402

# Force all boolean options to be boolean

2403

for option in ("debug", "use_dbus", "use_ipv6", "restore",

2404

"foreground"):

2405

server_settings[option] = bool(server_settings[option])

2406

# Debug implies foreground

2407

if server_settings["debug"]:

2408

server_settings["foreground"] = True

2220

2409

# Now we have our good server settings in "server_settings"

2221

2410

2222

2411

##################################################################

2228

2417

use_ipv6 = server_settings["use_ipv6"]

2229

2418

stored_state_path = os.path.join(server_settings["statedir"],

2230

2419

stored_state_file)

2420

foreground = server_settings["foreground"]

2231

2421

2232

2422

if debug:

2233

2423

initlogger(debug, logging.DEBUG)

2262

2452

use_ipv6=use_ipv6,

2263

2453

gnutls_priority=

2264

2454

server_settings["priority"],

2265

use_dbus=use_dbus)

2266

if not debug:

2267

pidfilename = "/var/run/mandos.pid"

2455

use_dbus=use_dbus,

2456

socketfd=(server_settings["socket"]

2457

or None))

2458

if not foreground:

2459

pidfilename = "/run/mandos.pid"

2460

pidfile = None

2268

2461

try:

2269

2462

pidfile = open(pidfilename, "w")

2270

2463

except IOError as e:

2285

2478

os.setgid(gid)

2286

2479

os.setuid(uid)

2287

2480

except OSError as error:

2288

if error[0] != errno.EPERM:

2481

if error.errno != errno.EPERM:

2289

2482

raise error

2290

2483

2291

2484

if debug:

2309

2502

os.close(null)

2310

2503

2311

2504

# Need to fork before connecting to D-Bus

2312

if not debug:

2505

if not foreground:

2313

2506

# Close all input and output, do double fork, etc.

2314

2507

daemon()

2315

2508

2509

# multiprocessing will use threads, so before we use gobject we

2510

# need to inform gobject that threads will be used.

2316

2511

gobject.threads_init()

2317

2512

2318

2513

global main_loop

2353

2548

old_client_settings = {}

2354

2549

clients_data = {}

2355

2550

2551

# This is used to redirect stdout and stderr for checker processes

2552

global wnull

2553

wnull = open(os.devnull, "w") # A writable /dev/null

2554

# Only used if server is running in foreground but not in debug

2555

# mode

2556

if debug or not foreground:

2557

wnull.close()

2558

2356

2559

# Get client data and settings from last running state.

2357

2560

if server_settings["restore"]:

2358

2561

try:

2374

2577

2375

2578

with PGPEngine() as pgp:

2376

2579

for client_name, client in clients_data.iteritems():

2580

# Skip removed clients

2581

if client_name not in client_settings:

2582

continue

2583

2377

2584

# Decide which value to use after restoring saved state.

2378

2585

# We have three different values: Old config file,

2379

2586

# new config file, and saved state.

2441

2648

# Create all client objects

2442

2649

for client_name, client in clients_data.iteritems():

2443

2650

tcp_server.clients[client_name] = client_class(

2444

name = client_name, settings = client)

2651

name = client_name, settings = client,

2652

server_settings = server_settings)

2445

2653

2446

2654

if not tcp_server.clients:

2447

2655

logger.warning("No clients defined")

2448

2656

2449

if not debug:

2450

try:

2451

with pidfile:

2452

pid = os.getpid()

2453

pidfile.write(str(pid) + "\n".encode("utf-8"))

2454

del pidfile

2455

except IOError:

2456

logger.error("Could not write to file %r with PID %d",

2457

pidfilename, pid)

2458

except NameError:

2459

# "pidfile" was never created

2460

pass

2657

if not foreground:

2658

if pidfile is not None:

2659

try:

2660

with pidfile:

2661

pid = os.getpid()

2662

pidfile.write(str(pid) + "\n".encode("utf-8"))

2663

except IOError:

2664

logger.error("Could not write to file %r with PID %d",

2665

pidfilename, pid)

2666

del pidfile

2461

2667

del pidfilename

2462

signal.signal(signal.SIGINT, signal.SIG_IGN)

2463

2668

2464

2669

signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())

2465

2670

signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())

2533

2738

service.cleanup()

2534

2739

2535

2740

multiprocessing.active_children()

2741

wnull.close()

2536

2742

if not (tcp_server.clients or client_settings):

2537

2743

return

2538

2744

2550

2756

# A list of attributes that can not be pickled

2551

2757

# + secret.

2552

2758

exclude = set(("bus", "changedstate", "secret",

2553

"checker"))

2759

"checker", "server_settings"))

2554

2760

for name, typ in (inspect.getmembers

2555

2761

(dbus.service.Object)):

2556

2762

exclude.add(name)