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# -*- mode: python; coding: utf-8 -*-
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# Mandos server - give out binary blobs to connecting clients.
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# This program is partly derived from an example program for an Avahi
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# service publisher, downloaded from
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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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# methods "add", "remove", "server_state_changed",
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# "entry_group_state_changed", "cleanup", and "activate" in the
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# "AvahiService" class, and some lines in "main".
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# Everything else is
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# Copyright © 2008-2016 Teddy Hogeborn
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# Copyright © 2008-2016 Björn Påhlsson
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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import xml.dom.minidom
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# Try to find the value of SO_BINDTODEVICE:
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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
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# newer, and it is also the most natural place for it:
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SO_BINDTODEVICE = socket.SO_BINDTODEVICE
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except AttributeError:
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# This is where SO_BINDTODEVICE was up to and including Python
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from IN import SO_BINDTODEVICE
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except ImportError:
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# In Python 2.7 it seems to have been removed entirely.
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# Try running the C preprocessor:
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cc = subprocess.Popen(["cc", "--language=c", "-E",
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE)
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stdout = cc.communicate(
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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
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SO_BINDTODEVICE = int(stdout.splitlines()[-1])
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except (OSError, ValueError, IndexError):
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SO_BINDTODEVICE = None
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SO_BINDTODEVICE = None
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if sys.version_info.major == 2:
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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'--passphrase-file',
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+ self.gnupgargs,
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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ciphertext, err = proc.communicate(input=data)
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stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
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ciphertext, err = proc.communicate(input = data)
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if proc.returncode != 0:
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raise PGPError(err)
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return ciphertext
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def decrypt(self, data, password):
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(
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dir=self.tempdir) as passfile:
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dir = self.tempdir) as passfile:
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passfile.write(passphrase)
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proc = subprocess.Popen([self.gpg, '--decrypt',
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'--passphrase-file',
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+ self.gnupgargs,
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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decrypted_plaintext, err = proc.communicate(input=data)
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stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
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decrypted_plaintext, err = proc.communicate(input = data)
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if proc.returncode != 0:
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raise PGPError(err)
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return decrypted_plaintext
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# Pretend that we have an Avahi module
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class Avahi(object):
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"""This isn't so much a class as it is a module-like namespace.
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It is instantiated once, and simulates having an Avahi module."""
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IF_UNSPEC = -1 # avahi-common/address.h
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PROTO_UNSPEC = -1 # avahi-common/address.h
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PROTO_INET = 0 # avahi-common/address.h
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PROTO_INET6 = 1 # avahi-common/address.h
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IF_UNSPEC = -1 # avahi-common/address.h
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PROTO_UNSPEC = -1 # avahi-common/address.h
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PROTO_INET = 0 # avahi-common/address.h
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PROTO_INET6 = 1 # avahi-common/address.h
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DBUS_NAME = "org.freedesktop.Avahi"
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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
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DBUS_PATH_SERVER = "/"
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def string_array_to_txt_array(self, t):
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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
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for s in t), signature="ay")
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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
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SERVER_INVALID = 0 # avahi-common/defs.h
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SERVER_REGISTERING = 1 # avahi-common/defs.h
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SERVER_RUNNING = 2 # avahi-common/defs.h
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SERVER_COLLISION = 3 # avahi-common/defs.h
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SERVER_FAILURE = 4 # avahi-common/defs.h
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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
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SERVER_INVALID = 0 # avahi-common/defs.h
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SERVER_REGISTERING = 1 # avahi-common/defs.h
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SERVER_RUNNING = 2 # avahi-common/defs.h
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SERVER_COLLISION = 3 # avahi-common/defs.h
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SERVER_FAILURE = 4 # avahi-common/defs.h
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class AvahiError(Exception):
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def __init__(self, value, *args, **kwargs):
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self.value = value
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.format(self.name)))
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# Pretend that we have a GnuTLS module
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class GnuTLS(object):
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"""This isn't so much a class as it is a module-like namespace.
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It is instantiated once, and simulates having a GnuTLS module."""
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library = ctypes.util.find_library("gnutls")
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library = ctypes.util.find_library("gnutls-deb0")
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_library = ctypes.cdll.LoadLibrary(library)
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_library = ctypes.cdll.LoadLibrary(
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ctypes.util.find_library("gnutls"))
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_need_version = b"3.3.0"
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def __init__(self):
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# Need to use "self" here, since this method is called before
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# the assignment to the "gnutls" global variable happens.
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if self.check_version(self._need_version) is None:
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raise self.Error("Needs GnuTLS {} or later"
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.format(self._need_version))
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# Need to use class name "GnuTLS" here, since this method is
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# called before the assignment to the "gnutls" global variable
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if GnuTLS.check_version(self._need_version) is None:
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raise GnuTLS.Error("Needs GnuTLS {} or later"
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.format(self._need_version))
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# Unless otherwise indicated, the constants and types below are
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# all from the gnutls/gnutls.h C header file.
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E_INTERRUPTED = -52
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CRD_CERTIFICATE = 1
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E_NO_CERTIFICATE_FOUND = -49
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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
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class session_int(ctypes.Structure):
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session_t = ctypes.POINTER(session_int)
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class certificate_credentials_st(ctypes.Structure):
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certificate_credentials_t = ctypes.POINTER(
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certificate_credentials_st)
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certificate_type_t = ctypes.c_int
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class datum_t(ctypes.Structure):
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_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
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('size', ctypes.c_uint)]
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class openpgp_crt_int(ctypes.Structure):
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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
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log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
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credentials_type_t = ctypes.c_int
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transport_ptr_t = ctypes.c_void_p
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close_request_t = ctypes.c_int
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class Error(Exception):
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# We need to use the class name "GnuTLS" here, since this
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# exception might be raised from within GnuTLS.__init__,
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# which is called before the assignment to the "gnutls"
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# global variable has happened.
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def __init__(self, message=None, code=None, args=()):
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def __init__(self, message = None, code = None, args=()):
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# Default usage is by a message string, but if a return
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# code is passed, convert it to a string with
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# gnutls.strerror()
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return _error_code(result)
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result = func(*arguments)
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# Unless otherwise indicated, the function declarations below are
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# all from the gnutls/gnutls.h C header file.
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priority_set_direct = _library.gnutls_priority_set_direct
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priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
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ctypes.POINTER(ctypes.c_char_p)]
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priority_set_direct.restype = _error_code
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init = _library.gnutls_init
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init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
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init.restype = _error_code
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set_default_priority = _library.gnutls_set_default_priority
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set_default_priority.argtypes = [session_t]
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set_default_priority.restype = _error_code
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record_send = _library.gnutls_record_send
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record_send.argtypes = [session_t, ctypes.c_void_p,
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record_send.restype = ctypes.c_ssize_t
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record_send.errcheck = _retry_on_error
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certificate_allocate_credentials = (
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_library.gnutls_certificate_allocate_credentials)
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certificate_allocate_credentials.argtypes = [
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ctypes.POINTER(certificate_credentials_t)]
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certificate_allocate_credentials.restype = _error_code
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certificate_free_credentials = (
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_library.gnutls_certificate_free_credentials)
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certificate_free_credentials.argtypes = [
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certificate_credentials_t]
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certificate_free_credentials.argtypes = [certificate_credentials_t]
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certificate_free_credentials.restype = None
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handshake_set_private_extensions = (
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_library.gnutls_handshake_set_private_extensions)
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handshake_set_private_extensions.argtypes = [session_t,
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handshake_set_private_extensions.restype = None
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credentials_set = _library.gnutls_credentials_set
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credentials_set.argtypes = [session_t, credentials_type_t,
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credentials_set.restype = _error_code
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strerror = _library.gnutls_strerror
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strerror.argtypes = [ctypes.c_int]
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strerror.restype = ctypes.c_char_p
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certificate_type_get = _library.gnutls_certificate_type_get
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certificate_type_get.argtypes = [session_t]
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certificate_type_get.restype = _error_code
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certificate_get_peers = _library.gnutls_certificate_get_peers
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certificate_get_peers.argtypes = [session_t,
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ctypes.POINTER(ctypes.c_uint)]
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certificate_get_peers.restype = ctypes.POINTER(datum_t)
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global_set_log_level = _library.gnutls_global_set_log_level
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global_set_log_level.argtypes = [ctypes.c_int]
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global_set_log_level.restype = None
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global_set_log_function = _library.gnutls_global_set_log_function
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global_set_log_function.argtypes = [log_func]
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global_set_log_function.restype = None
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deinit = _library.gnutls_deinit
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deinit.argtypes = [session_t]
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deinit.restype = None
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handshake = _library.gnutls_handshake
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handshake.argtypes = [session_t]
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handshake.restype = _error_code
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handshake.errcheck = _retry_on_error
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transport_set_ptr = _library.gnutls_transport_set_ptr
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transport_set_ptr.argtypes = [session_t, transport_ptr_t]
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transport_set_ptr.restype = None
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bye = _library.gnutls_bye
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bye.argtypes = [session_t, close_request_t]
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bye.restype = _error_code
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bye.errcheck = _retry_on_error
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check_version = _library.gnutls_check_version
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check_version.argtypes = [ctypes.c_char_p]
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check_version.restype = ctypes.c_char_p
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# All the function declarations below are from gnutls/openpgp.h
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openpgp_crt_init = _library.gnutls_openpgp_crt_init
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openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
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openpgp_crt_init.restype = _error_code
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openpgp_crt_import = _library.gnutls_openpgp_crt_import
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openpgp_crt_import.argtypes = [openpgp_crt_t,
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ctypes.POINTER(datum_t),
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openpgp_crt_fmt_t]
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openpgp_crt_import.restype = _error_code
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openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
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openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
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ctypes.POINTER(ctypes.c_uint)]
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openpgp_crt_verify_self.restype = _error_code
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openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
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openpgp_crt_deinit.argtypes = [openpgp_crt_t]
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openpgp_crt_deinit.restype = None
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openpgp_crt_get_fingerprint = (
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_library.gnutls_openpgp_crt_get_fingerprint)
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openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
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# The exception is when not debugging but nevertheless
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# running in the foreground; use the previously
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# created wnull.
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popen_args = {"close_fds": True,
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popen_args = { "close_fds": True,
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if (not self.server_settings["debug"]
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and self.server_settings["foreground"]):
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popen_args.update({"stdout": wnull,
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pipe = multiprocessing.Pipe(duplex=False)
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pipe = multiprocessing.Pipe(duplex = False)
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self.checker = multiprocessing.Process(
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args=(pipe[1], subprocess.call, command),
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args = (pipe[1], subprocess.call, command),
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kwargs = popen_args)
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self.checker.start()
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self.checker_callback_tag = GLib.io_add_watch(
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pipe[0].fileno(), GLib.IO_IN,
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self.checker_callback, pipe[0], command)
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# Re-run this periodically if run by GLib.timeout_add
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def stop_checker(self):
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"""Force the checker process, if any, to stop."""
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if self.checker_callback_tag:
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func._dbus_name = func.__name__
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if func._dbus_name.endswith("_dbus_property"):
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func._dbus_name = func._dbus_name[:-14]
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func._dbus_get_args_options = {'byte_arrays': byte_arrays}
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func._dbus_get_args_options = {'byte_arrays': byte_arrays }
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return decorator
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def dbus_interface_annotations(dbus_interface):
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"""Decorator for marking functions returning interface annotations
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@dbus_interface_annotations("org.example.Interface")
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def _foo(self): # Function name does not matter
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return {"org.freedesktop.DBus.Deprecated": "true",
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"org.freedesktop.DBus.Property.EmitsChangedSignal":
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def decorator(func):
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func._dbus_is_interface = True
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func._dbus_interface = dbus_interface
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func._dbus_name = dbus_interface
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return decorator
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def dbus_annotations(annotations):
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"""Decorator to annotate D-Bus methods, signals or properties
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@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
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"org.freedesktop.DBus.Property."
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"EmitsChangedSignal": "false"})
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for cls in self.__class__.__mro__
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for name, athing in
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inspect.getmembers(cls, self._is_dbus_thing(thing)))
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@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
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path_keyword='object_path',
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connection_keyword='connection')
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out_signature = "s",
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path_keyword = 'object_path',
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connection_keyword = 'connection')
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def Introspect(self, object_path, connection):
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"""Overloading of standard D-Bus method.
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Inserts annotation tags on methods and signals.
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xmlstring = dbus.service.Object.Introspect(self, object_path,
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document = xml.dom.minidom.parseString(xmlstring)
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for if_tag in document.getElementsByTagName("interface"):
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# Add annotation tags
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for typ in ("method", "signal"):
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exc_info=error)
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return xmlstring
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dbus.OBJECT_MANAGER_IFACE
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except AttributeError:
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dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
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class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
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"""A D-Bus object with an ObjectManager.
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Classes inheriting from this exposes the standard
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GetManagedObjects call and the InterfacesAdded and
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InterfacesRemoved signals on the standard
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"org.freedesktop.DBus.ObjectManager" interface.
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Note: No signals are sent automatically; they must be sent
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@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
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out_signature="a{oa{sa{sv}}}")
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out_signature = "a{oa{sa{sv}}}")
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def GetManagedObjects(self):
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"""This function must be overridden"""
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raise NotImplementedError()
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@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
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signature="oa{sa{sv}}")
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signature = "oa{sa{sv}}")
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def InterfacesAdded(self, object_path, interfaces_and_properties):
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@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
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@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
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def InterfacesRemoved(self, object_path, interfaces):
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@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
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path_keyword='object_path',
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connection_keyword='connection')
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out_signature = "s",
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path_keyword = 'object_path',
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connection_keyword = 'connection')
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def Introspect(self, object_path, connection):
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"""Overloading of standard D-Bus method.
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Override return argument name of GetManagedObjects to be
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"objpath_interfaces_and_properties"
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dbus.service.Object, it will add alternate D-Bus attributes with
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interface names according to the "alt_interface_names" mapping.
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@alternate_dbus_interfaces({"org.example.Interface":
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"net.example.AlternateInterface"})
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class SampleDBusObject(dbus.service.Object):
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@dbus.service.method("org.example.Interface")
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def SampleDBusMethod():
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The above "SampleDBusMethod" on "SampleDBusObject" will be
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reachable via two interfaces: "org.example.Interface" and
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"net.example.AlternateInterface", the latter of which will have
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its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
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"true", unless "deprecate" is passed with a False value.
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This works for methods and signals, and also for D-Bus properties
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(from DBusObjectWithProperties) and interfaces (from the
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dbus_interface_annotations decorator).
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def wrapper(cls):
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for orig_interface_name, alt_interface_name in (
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alt_interface_names.items()):
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"se.bsnet.fukt.Mandos"})
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class ClientDBus(Client, DBusObjectWithProperties):
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"""A Client class using D-Bus
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dbus_object_path: dbus.ObjectPath
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bus: dbus.SystemBus()
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runtime_expansions = (Client.runtime_expansions
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+ ("dbus_object_path", ))
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_interface = "se.recompile.Mandos.Client"
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# dbus.service.Object doesn't use super(), so we can't either.
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def __init__(self, bus=None, *args, **kwargs):
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def __init__(self, bus = None, *args, **kwargs):
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Client.__init__(self, *args, **kwargs)
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# Only now, when this client is initialized, can it show up on
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dbus_value = transform_func(
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type_func(value),
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variant_level=variant_level)
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variant_level = variant_level)
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self.PropertyChanged(dbus.String(dbus_name),
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self.PropertiesChanged(
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dbus.Dictionary({dbus.String(dbus_name):
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dbus.Dictionary({ dbus.String(dbus_name):
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setattr(self, attrname, value)
1780
1743
return property(lambda self: getattr(self, attrname), setter)
1782
1745
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1783
1746
approvals_pending = notifychangeproperty(dbus.Boolean,
1784
1747
"ApprovalPending",
1786
1749
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1787
1750
last_enabled = notifychangeproperty(datetime_to_dbus,
1789
1752
checker = notifychangeproperty(
1790
1753
dbus.Boolean, "CheckerRunning",
1791
type_func=lambda checker: checker is not None)
1754
type_func = lambda checker: checker is not None)
1792
1755
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1793
1756
"LastCheckedOK")
1794
1757
last_checker_status = notifychangeproperty(dbus.Int16,
1799
1762
"ApprovedByDefault")
1800
1763
approval_delay = notifychangeproperty(
1801
1764
dbus.UInt64, "ApprovalDelay",
1802
type_func=lambda td: td.total_seconds() * 1000)
1765
type_func = lambda td: td.total_seconds() * 1000)
1803
1766
approval_duration = notifychangeproperty(
1804
1767
dbus.UInt64, "ApprovalDuration",
1805
type_func=lambda td: td.total_seconds() * 1000)
1768
type_func = lambda td: td.total_seconds() * 1000)
1806
1769
host = notifychangeproperty(dbus.String, "Host")
1807
1770
timeout = notifychangeproperty(
1808
1771
dbus.UInt64, "Timeout",
1809
type_func=lambda td: td.total_seconds() * 1000)
1772
type_func = lambda td: td.total_seconds() * 1000)
1810
1773
extended_timeout = notifychangeproperty(
1811
1774
dbus.UInt64, "ExtendedTimeout",
1812
type_func=lambda td: td.total_seconds() * 1000)
1775
type_func = lambda td: td.total_seconds() * 1000)
1813
1776
interval = notifychangeproperty(
1814
1777
dbus.UInt64, "Interval",
1815
type_func=lambda td: td.total_seconds() * 1000)
1778
type_func = lambda td: td.total_seconds() * 1000)
1816
1779
checker_command = notifychangeproperty(dbus.String, "Checker")
1817
1780
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1818
1781
invalidate_only=True)
1820
1783
del notifychangeproperty
1822
1785
def __del__(self, *args, **kwargs):
1824
1787
self.remove_from_connection()
1859
1822
# Emit D-Bus signal
1860
1823
self.CheckerStarted(self.current_checker_command)
1863
1826
def _reset_approved(self):
1864
1827
self.approved = None
1867
1830
def approve(self, value=True):
1868
1831
self.approved = value
1869
1832
GLib.timeout_add(int(self.approval_duration.total_seconds()
1870
1833
* 1000), self._reset_approved)
1871
1834
self.send_changedstate()
1873
# D-Bus methods, signals & properties
1836
## D-Bus methods, signals & properties
1879
1842
# CheckerCompleted - signal
1880
1843
@dbus.service.signal(_interface, signature="nxs")
1881
1844
def CheckerCompleted(self, exitcode, waitstatus, command):
1885
1848
# CheckerStarted - signal
1886
1849
@dbus.service.signal(_interface, signature="s")
1887
1850
def CheckerStarted(self, command):
1891
1854
# PropertyChanged - signal
1892
1855
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1893
1856
@dbus.service.signal(_interface, signature="sv")
1894
1857
def PropertyChanged(self, property, value):
1898
1861
# GotSecret - signal
1899
1862
@dbus.service.signal(_interface)
1900
1863
def GotSecret(self):
1903
1866
server to mandos-client
1907
1870
# Rejected - signal
1908
1871
@dbus.service.signal(_interface, signature="s")
1909
1872
def Rejected(self, reason):
1913
1876
# NeedApproval - signal
1914
1877
@dbus.service.signal(_interface, signature="tb")
1915
1878
def NeedApproval(self, timeout, default):
1917
1880
return self.need_approval()
1921
1884
# Approve - method
1922
1885
@dbus.service.method(_interface, in_signature="b")
1923
1886
def Approve(self, value):
1924
1887
self.approve(value)
1926
1889
# CheckedOK - method
1927
1890
@dbus.service.method(_interface)
1928
1891
def CheckedOK(self):
1929
1892
self.checked_ok()
1931
1894
# Enable - method
1932
1895
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1933
1896
@dbus.service.method(_interface)
1934
1897
def Enable(self):
1938
1901
# StartChecker - method
1939
1902
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1940
1903
@dbus.service.method(_interface)
1941
1904
def StartChecker(self):
1943
1906
self.start_checker()
1945
1908
# Disable - method
1946
1909
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1947
1910
@dbus.service.method(_interface)
1948
1911
def Disable(self):
1952
1915
# StopChecker - method
1953
1916
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1954
1917
@dbus.service.method(_interface)
1955
1918
def StopChecker(self):
1956
1919
self.stop_checker()
1960
1923
# ApprovalPending - property
1961
1924
@dbus_service_property(_interface, signature="b", access="read")
1962
1925
def ApprovalPending_dbus_property(self):
1963
1926
return dbus.Boolean(bool(self.approvals_pending))
1965
1928
# ApprovedByDefault - property
1966
1929
@dbus_service_property(_interface,
2047
2010
self.checked_ok()
2049
2012
return datetime_to_dbus(self.last_checked_ok)
2051
2014
# LastCheckerStatus - property
2052
2015
@dbus_service_property(_interface, signature="n", access="read")
2053
2016
def LastCheckerStatus_dbus_property(self):
2054
2017
return dbus.Int16(self.last_checker_status)
2056
2019
# Expires - property
2057
2020
@dbus_service_property(_interface, signature="s", access="read")
2058
2021
def Expires_dbus_property(self):
2059
2022
return datetime_to_dbus(self.expires)
2061
2024
# LastApprovalRequest - property
2062
2025
@dbus_service_property(_interface, signature="s", access="read")
2063
2026
def LastApprovalRequest_dbus_property(self):
2064
2027
return datetime_to_dbus(self.last_approval_request)
2066
2029
# Timeout - property
2067
2030
@dbus_service_property(_interface,
2189
2152
class ClientHandler(socketserver.BaseRequestHandler, object):
2190
2153
"""A class to handle client connections.
2192
2155
Instantiated once for each connection to handle it.
2193
2156
Note: This will run in its own forked process."""
2195
2158
def handle(self):
2196
2159
with contextlib.closing(self.server.child_pipe) as child_pipe:
2197
2160
logger.info("TCP connection from: %s",
2198
2161
str(self.client_address))
2199
2162
logger.debug("Pipe FD: %d",
2200
2163
self.server.child_pipe.fileno())
2202
2165
session = gnutls.ClientSession(self.request)
2204
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2205
# "+AES-256-CBC", "+SHA1",
2206
# "+COMP-NULL", "+CTYPE-OPENPGP",
2167
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2168
# "+AES-256-CBC", "+SHA1",
2169
# "+COMP-NULL", "+CTYPE-OPENPGP",
2208
2171
# Use a fallback default, since this MUST be set.
2209
2172
priority = self.server.gnutls_priority
2210
2173
if priority is None:
2211
2174
priority = "NORMAL"
2212
gnutls.priority_set_direct(session._c_object,
2213
priority.encode("utf-8"),
2175
gnutls.priority_set_direct(session._c_object, priority,
2216
2178
# Start communication using the Mandos protocol
2217
2179
# Get protocol number
2218
2180
line = self.request.makefile().readline()
2383
2345
class MultiprocessingMixIn(object):
2384
2346
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2386
2348
def sub_process_main(self, request, address):
2388
2350
self.finish_request(request, address)
2389
2351
except Exception:
2390
2352
self.handle_error(request, address)
2391
2353
self.close_request(request)
2393
2355
def process_request(self, request, address):
2394
2356
"""Start a new process to process the request."""
2395
proc = multiprocessing.Process(target=self.sub_process_main,
2396
args=(request, address))
2357
proc = multiprocessing.Process(target = self.sub_process_main,
2358
args = (request, address))
2401
2363
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2402
2364
""" adds a pipe to the MixIn """
2404
2366
def process_request(self, request, client_address):
2405
2367
"""Overrides and wraps the original process_request().
2407
2369
This function creates a new pipe in self.pipe
2409
2371
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2411
2373
proc = MultiprocessingMixIn.process_request(self, request,
2412
2374
client_address)
2413
2375
self.child_pipe.close()
2414
2376
self.add_pipe(parent_pipe, proc)
2416
2378
def add_pipe(self, parent_pipe, proc):
2417
2379
"""Dummy function; override as necessary"""
2418
2380
raise NotImplementedError()
2467
2428
# socket_wrapper(), if socketfd was set.
2468
2429
socketserver.TCPServer.__init__(self, server_address,
2469
2430
RequestHandlerClass)
2471
2432
def server_bind(self):
2472
2433
"""This overrides the normal server_bind() function
2473
2434
to bind to an interface if one was specified, and also NOT to
2474
2435
bind to an address or port if they were not specified."""
2475
global SO_BINDTODEVICE
2476
2436
if self.interface is not None:
2477
2437
if SO_BINDTODEVICE is None:
2478
# Fall back to a hard-coded value which seems to be
2480
logger.warning("SO_BINDTODEVICE not found, trying 25")
2481
SO_BINDTODEVICE = 25
2483
self.socket.setsockopt(
2484
socket.SOL_SOCKET, SO_BINDTODEVICE,
2485
(self.interface + "\0").encode("utf-8"))
2486
except socket.error as error:
2487
if error.errno == errno.EPERM:
2488
logger.error("No permission to bind to"
2489
" interface %s", self.interface)
2490
elif error.errno == errno.ENOPROTOOPT:
2491
logger.error("SO_BINDTODEVICE not available;"
2492
" cannot bind to interface %s",
2494
elif error.errno == errno.ENODEV:
2495
logger.error("Interface %s does not exist,"
2496
" cannot bind", self.interface)
2438
logger.error("SO_BINDTODEVICE does not exist;"
2439
" cannot bind to interface %s",
2443
self.socket.setsockopt(
2444
socket.SOL_SOCKET, SO_BINDTODEVICE,
2445
(self.interface + "\0").encode("utf-8"))
2446
except socket.error as error:
2447
if error.errno == errno.EPERM:
2448
logger.error("No permission to bind to"
2449
" interface %s", self.interface)
2450
elif error.errno == errno.ENOPROTOOPT:
2451
logger.error("SO_BINDTODEVICE not available;"
2452
" cannot bind to interface %s",
2454
elif error.errno == errno.ENODEV:
2455
logger.error("Interface %s does not exist,"
2456
" cannot bind", self.interface)
2499
2459
# Only bind(2) the socket if we really need to.
2500
2460
if self.server_address[0] or self.server_address[1]:
2501
2461
if not self.server_address[0]:
2502
2462
if self.address_family == socket.AF_INET6:
2503
any_address = "::" # in6addr_any
2463
any_address = "::" # in6addr_any
2505
any_address = "0.0.0.0" # INADDR_ANY
2465
any_address = "0.0.0.0" # INADDR_ANY
2506
2466
self.server_address = (any_address,
2507
2467
self.server_address[1])
2508
2468
elif not self.server_address[1]:
2542
2502
self.gnutls_priority = gnutls_priority
2543
2503
IPv6_TCPServer.__init__(self, server_address,
2544
2504
RequestHandlerClass,
2545
interface=interface,
2505
interface = interface,
2506
use_ipv6 = use_ipv6,
2507
socketfd = socketfd)
2549
2509
def server_activate(self):
2550
2510
if self.enabled:
2551
2511
return socketserver.TCPServer.server_activate(self)
2553
2513
def enable(self):
2554
2514
self.enabled = True
2556
2516
def add_pipe(self, parent_pipe, proc):
2557
2517
# Call "handle_ipc" for both data and EOF events
2558
2518
GLib.io_add_watch(
2559
2519
parent_pipe.fileno(),
2560
2520
GLib.IO_IN | GLib.IO_HUP,
2561
2521
functools.partial(self.handle_ipc,
2562
parent_pipe=parent_pipe,
2522
parent_pipe = parent_pipe,
2565
2525
def handle_ipc(self, source, condition,
2566
2526
parent_pipe=None,
2568
2528
client_object=None):
2569
2529
# error, or the other end of multiprocessing.Pipe has closed
2570
2530
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2571
2531
# Wait for other process to exit
2575
2535
# Read a request from the child
2576
2536
request = parent_pipe.recv()
2577
2537
command = request[0]
2579
2539
if command == 'init':
2580
2540
fpr = request[1]
2581
2541
address = request[2]
2583
2543
for c in self.clients.values():
2584
2544
if c.fingerprint == fpr:
2649
2609
>>> rfc3339_duration_to_delta("P1DT3M20S")
2650
2610
datetime.timedelta(1, 200)
2653
2613
# Parsing an RFC 3339 duration with regular expressions is not
2654
2614
# possible - there would have to be multiple places for the same
2655
2615
# values, like seconds. The current code, while more esoteric, is
2656
2616
# cleaner without depending on a parsing library. If Python had a
2657
2617
# built-in library for parsing we would use it, but we'd like to
2658
2618
# avoid excessive use of external libraries.
2660
2620
# New type for defining tokens, syntax, and semantics all-in-one
2661
2621
Token = collections.namedtuple("Token", (
2662
2622
"regexp", # To match token; if "value" is not None, must have
2849
2806
parser.add_argument("--no-zeroconf", action="store_false",
2850
2807
dest="zeroconf", help="Do not use Zeroconf",
2853
2810
options = parser.parse_args()
2855
2812
if options.check:
2857
2814
fail_count, test_count = doctest.testmod()
2858
2815
sys.exit(os.EX_OK if fail_count == 0 else 1)
2860
2817
# Default values for config file for server-global settings
2861
server_defaults = {"interface": "",
2866
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2867
":+SIGN-DSA-SHA256",
2868
"servicename": "Mandos",
2874
"statedir": "/var/lib/mandos",
2875
"foreground": "False",
2818
server_defaults = { "interface": "",
2823
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2824
":+SIGN-DSA-SHA256",
2825
"servicename": "Mandos",
2831
"statedir": "/var/lib/mandos",
2832
"foreground": "False",
2879
2836
# Parse config file for server-global settings
2880
2837
server_config = configparser.SafeConfigParser(server_defaults)
2881
2838
del server_defaults
3011
2967
.format(uid, gid, os.strerror(error.errno)))
3012
2968
if error.errno != errno.EPERM:
3016
2972
# Enable all possible GnuTLS debugging
3018
2974
# "Use a log level over 10 to enable all debugging options."
3019
2975
# - GnuTLS manual
3020
2976
gnutls.global_set_log_level(11)
3022
2978
@gnutls.log_func
3023
2979
def debug_gnutls(level, string):
3024
2980
logger.debug("GnuTLS: %s", string[:-1])
3026
2982
gnutls.global_set_log_function(debug_gnutls)
3028
2984
# Redirect stdin so all checkers get /dev/null
3029
2985
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3030
2986
os.dup2(null, sys.stdin.fileno())
3034
2990
# Need to fork before connecting to D-Bus
3035
2991
if not foreground:
3036
2992
# Close all input and output, do double fork, etc.
3039
2995
# multiprocessing will use threads, so before we use GLib we need
3040
2996
# to inform GLib that threads will be used.
3041
2997
GLib.threads_init()
3043
2999
global main_loop
3044
3000
# From the Avahi example code
3045
3001
DBusGMainLoop(set_as_default=True)
3063
3019
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3064
3020
service = AvahiServiceToSyslog(
3065
name=server_settings["servicename"],
3066
servicetype="_mandos._tcp",
3021
name = server_settings["servicename"],
3022
servicetype = "_mandos._tcp",
3023
protocol = protocol,
3069
3025
if server_settings["interface"]:
3070
3026
service.interface = if_nametoindex(
3071
3027
server_settings["interface"].encode("utf-8"))
3073
3029
global multiprocessing_manager
3074
3030
multiprocessing_manager = multiprocessing.Manager()
3076
3032
client_class = Client
3078
client_class = functools.partial(ClientDBus, bus=bus)
3034
client_class = functools.partial(ClientDBus, bus = bus)
3080
3036
client_settings = Client.config_parser(client_config)
3081
3037
old_client_settings = {}
3082
3038
clients_data = {}
3084
3040
# This is used to redirect stdout and stderr for checker processes
3086
wnull = open(os.devnull, "w") # A writable /dev/null
3042
wnull = open(os.devnull, "w") # A writable /dev/null
3087
3043
# Only used if server is running in foreground but not in debug
3089
3045
if debug or not foreground:
3092
3048
# Get client data and settings from last running state.
3093
3049
if server_settings["restore"]:
3095
3051
with open(stored_state_path, "rb") as stored_state:
3096
if sys.version_info.major == 2:
3052
if sys.version_info.major == 2:
3097
3053
clients_data, old_client_settings = pickle.load(
3100
3056
bytes_clients_data, bytes_old_client_settings = (
3101
pickle.load(stored_state, encoding="bytes"))
3102
# Fix bytes to strings
3057
pickle.load(stored_state, encoding = "bytes"))
3058
### Fix bytes to strings
3105
clients_data = {(key.decode("utf-8")
3106
if isinstance(key, bytes)
3109
bytes_clients_data.items()}
3061
clients_data = { (key.decode("utf-8")
3062
if isinstance(key, bytes)
3065
bytes_clients_data.items() }
3110
3066
del bytes_clients_data
3111
3067
for key in clients_data:
3112
value = {(k.decode("utf-8")
3113
if isinstance(k, bytes) else k): v
3115
clients_data[key].items()}
3068
value = { (k.decode("utf-8")
3069
if isinstance(k, bytes) else k): v
3071
clients_data[key].items() }
3116
3072
clients_data[key] = value
3117
3073
# .client_structure
3118
3074
value["client_structure"] = [
3119
3075
(s.decode("utf-8")
3120
3076
if isinstance(s, bytes)
3121
3077
else s) for s in
3122
value["client_structure"]]
3078
value["client_structure"] ]
3123
3079
# .name & .host
3124
3080
for k in ("name", "host"):
3125
3081
if isinstance(value[k], bytes):
3126
3082
value[k] = value[k].decode("utf-8")
3127
# old_client_settings
3083
## old_client_settings
3129
3085
old_client_settings = {
3130
3086
(key.decode("utf-8")
3131
3087
if isinstance(key, bytes)
3132
3088
else key): value
3133
3089
for key, value in
3134
bytes_old_client_settings.items()}
3090
bytes_old_client_settings.items() }
3135
3091
del bytes_old_client_settings
3137
3093
for value in old_client_settings.values():
3243
3199
pidfilename, pid)
3245
3201
del pidfilename
3247
3203
for termsig in (signal.SIGHUP, signal.SIGTERM):
3248
3204
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3249
3205
lambda: main_loop.quit() and False)
3253
3209
@alternate_dbus_interfaces(
3254
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3210
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3255
3211
class MandosDBusService(DBusObjectWithObjectManager):
3256
3212
"""A D-Bus proxy object"""
3258
3214
def __init__(self):
3259
3215
dbus.service.Object.__init__(self, bus, "/")
3261
3217
_interface = "se.recompile.Mandos"
3263
3219
@dbus.service.signal(_interface, signature="o")
3264
3220
def ClientAdded(self, objpath):
3268
3224
@dbus.service.signal(_interface, signature="ss")
3269
3225
def ClientNotFound(self, fingerprint, address):
3273
3229
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3275
3231
@dbus.service.signal(_interface, signature="os")
3276
3232
def ClientRemoved(self, objpath, name):
3280
3236
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3282
3238
@dbus.service.method(_interface, out_signature="ao")
3310
3266
self.client_removed_signal(c)
3312
3268
raise KeyError(object_path)
3316
3272
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3317
out_signature="a{oa{sa{sv}}}")
3273
out_signature = "a{oa{sa{sv}}}")
3318
3274
def GetManagedObjects(self):
3319
3275
"""D-Bus method"""
3320
3276
return dbus.Dictionary(
3321
{client.dbus_object_path:
3323
{interface: client.GetAll(interface)
3325
client._get_all_interface_names()})
3326
for client in tcp_server.clients.values()})
3277
{ client.dbus_object_path:
3279
{ interface: client.GetAll(interface)
3281
client._get_all_interface_names()})
3282
for client in tcp_server.clients.values()})
3328
3284
def client_added_signal(self, client):
3329
3285
"""Send the new standard signal and the old signal"""
3376
3327
client.encrypted_secret = pgp.encrypt(client.secret,
3378
3329
client_dict = {}
3380
3331
# A list of attributes that can not be pickled
3382
exclude = {"bus", "changedstate", "secret",
3383
"checker", "server_settings"}
3333
exclude = { "bus", "changedstate", "secret",
3334
"checker", "server_settings" }
3384
3335
for name, typ in inspect.getmembers(dbus.service
3386
3337
exclude.add(name)
3388
3339
client_dict["encrypted_secret"] = (client
3389
3340
.encrypted_secret)
3390
3341
for attr in client.client_structure:
3391
3342
if attr not in exclude:
3392
3343
client_dict[attr] = getattr(client, attr)
3394
3345
clients[client.name] = client_dict
3395
3346
del client_settings[client.name]["secret"]
3398
3349
with tempfile.NamedTemporaryFile(