/mandos/trunk

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/trunk

« back to all changes in this revision

Viewing changes to mandos-ctl

  • Committer: teddy at recompile
  • Date: 2020-12-03 20:30:45 UTC
  • Revision ID: teddy@recompile.se-20201203203045-iqd6nq9y5nwalh1x
Minor fix of a test function

In dracut-module/password-agent, the test function
test_send_password_to_socket_EMSGSIZE() (which tests that the
send_password_to_socket() task function aborts properly when getting
EMSGSIZE when writing to the password socket), part of the test code
is supposed to find a message size which definitely does trigger
EMSGSIZE when send()ing to a socket.  Without a "break" in the proper
place, however, the size given is always exactly 1024 bytes too large.

This is very probably not a problem, since a too large message will
still be too large if it is increased by 1024 bytes, and send(2) in
practice checks the size before reading the buffer.  The biggest issue
would be if some version of send(2) would try to look at the last 1024
bytes of the message buffer before checking the message size; this
would then lead to a buffer over-read when running this test function.
(But even then there would be no security implications since the tests
are not run in the normal operation of the program.)

* dracut-module/password-agent.c
  (test_send_password_to_socket_EMSGSIZE): Break out early when ssret
  < 0 and errno == EMSGSIZE; don't allow loop to increase message_size
  again.

Show diffs side-by-side

added added

removed removed

Lines of Context:
mandos-ctl
1
 
#!/usr/bin/python
 
1
#!/usr/bin/python3 -bbI
2
2
# -*- after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-
3
3
#
4
 
# Mandos Monitor - Control and monitor the Mandos server
 
4
# Mandos Control - Control or query the Mandos server
5
5
#
6
 
# Copyright © 2008-2019 Teddy Hogeborn
7
 
# Copyright © 2008-2019 Björn Påhlsson
 
6
# Copyright © 2008-2020 Teddy Hogeborn
 
7
# Copyright © 2008-2020 Björn Påhlsson
8
8
#
9
9
# This file is part of Mandos.
10
10
#
48
48
 
49
49
if sys.version_info.major == 2:
50
50
    __metaclass__ = type
 
51
    str = unicode
 
52
 
 
53
class gi:
 
54
    """Dummy gi module, for the tests"""
 
55
    class repository:
 
56
        class GLib:
 
57
            class Error(Exception):
 
58
                pass
 
59
dbussy = None
 
60
ravel = None
 
61
dbus_python = None
 
62
pydbus = None
51
63
 
52
64
try:
53
 
    import pydbus
54
 
    import gi
55
 
    dbus_python = None
 
65
    import dbussy
 
66
    import ravel
56
67
except ImportError:
57
 
    import dbus as dbus_python
58
 
    pydbus = None
59
 
    class gi:
60
 
        """Dummy gi module, for the tests"""
61
 
        class repository:
62
 
            class GLib:
63
 
                class Error(Exception):
64
 
                    pass
 
68
    try:
 
69
        import pydbus
 
70
        import gi
 
71
    except ImportError:
 
72
        import dbus as dbus_python
 
73
 
65
74
 
66
75
# Show warnings by default
67
76
if not sys.warnoptions:
75
84
logging.captureWarnings(True)   # Show warnings via the logging system
76
85
 
77
86
if sys.version_info.major == 2:
78
 
    str = unicode
79
87
    import StringIO
80
88
    io.StringIO = StringIO.StringIO
81
89
 
82
90
locale.setlocale(locale.LC_ALL, "")
83
91
 
84
 
version = "1.8.7"
 
92
version = "1.8.13"
85
93
 
86
94
 
87
95
def main():
96
104
    if options.debug:
97
105
        log.setLevel(logging.DEBUG)
98
106
 
99
 
    if pydbus is not None:
 
107
    if dbussy is not None and ravel is not None:
 
108
        bus = dbussy_adapter.CachingBus(dbussy, ravel)
 
109
    elif pydbus is not None:
100
110
        bus = pydbus_adapter.CachingBus(pydbus)
101
111
    else:
102
112
        bus = dbus_python_adapter.CachingBus(dbus_python)
487
497
                             self.properties_iface, interface, key,
488
498
                             value)
489
499
 
 
500
        def call_method(self, methodname, busname, objectpath,
 
501
                        interface, *args):
 
502
            raise NotImplementedError()
 
503
 
490
504
 
491
505
    class MandosBus(SystemBus):
492
506
        busname_domain = "se.recompile"
682
696
                return new_object
683
697
 
684
698
 
 
699
class dbussy_adapter:
 
700
    class SystemBus(dbus.SystemBus):
 
701
        """Use DBussy"""
 
702
 
 
703
        def __init__(self, dbussy, ravel):
 
704
            self.dbussy = dbussy
 
705
            self.ravel = ravel
 
706
            self.bus = ravel.system_bus()
 
707
 
 
708
        @contextlib.contextmanager
 
709
        def convert_exception(self, exception_class=dbus.Error):
 
710
            try:
 
711
                yield
 
712
            except self.dbussy.DBusError as e:
 
713
                # This does what "raise from" would do
 
714
                exc = exception_class(*e.args)
 
715
                exc.__cause__ = e
 
716
                raise exc
 
717
 
 
718
        def call_method(self, methodname, busname, objectpath,
 
719
                        interface, *args):
 
720
            proxy_object = self.get_object(busname, objectpath)
 
721
            log.debug("D-Bus: %s:%s:%s.%s(%s)", busname, objectpath,
 
722
                      interface, methodname,
 
723
                      ", ".join(repr(a) for a in args))
 
724
            iface = proxy_object.get_interface(interface)
 
725
            method = getattr(iface, methodname)
 
726
            with self.convert_exception(dbus.Error):
 
727
                value =  method(*args)
 
728
            # DBussy returns values either as an empty list or as a
 
729
            # list of one element with the return value
 
730
            if value:
 
731
                return self.type_filter(value[0])
 
732
 
 
733
        def get_object(self, busname, objectpath):
 
734
            log.debug("D-Bus: Connect to: (busname=%r, path=%r)",
 
735
                      busname, objectpath)
 
736
            with self.convert_exception(dbus.ConnectFailed):
 
737
                return self.bus[busname][objectpath]
 
738
 
 
739
        def type_filter(self, value):
 
740
            """Convert the most bothersome types to Python types"""
 
741
            # A D-Bus Variant value is represented as the Python type
 
742
            # Tuple[dbussy.DBUS.Signature, Any]
 
743
            if isinstance(value, tuple):
 
744
                if (len(value) == 2
 
745
                    and isinstance(value[0],
 
746
                                   self.dbussy.DBUS.Signature)):
 
747
                    return self.type_filter(value[1])
 
748
            elif isinstance(value, self.dbussy.DBUS.ObjectPath):
 
749
                return str(value)
 
750
            # Also recurse into dictionaries
 
751
            elif isinstance(value, dict):
 
752
                return {self.type_filter(key):
 
753
                        self.type_filter(subval)
 
754
                        for key, subval in value.items()}
 
755
            return value
 
756
 
 
757
        def set_property(self, busname, objectpath, interface, key,
 
758
                         value):
 
759
            proxy_object = self.get_object(busname, objectpath)
 
760
            log.debug("D-Bus: %s:%s:%s.Set(%r, %r, %r)", busname,
 
761
                      objectpath, self.properties_iface, interface,
 
762
                      key, value)
 
763
            if key == "Secret":
 
764
                # DBussy wants a Byte Array to be a sequence of
 
765
                # values, not a byte string
 
766
                value = tuple(value)
 
767
            setattr(proxy_object.get_interface(interface), key, value)
 
768
 
 
769
    class MandosBus(SystemBus, dbus.MandosBus):
 
770
        pass
 
771
 
 
772
    class CachingBus(MandosBus):
 
773
        """A caching layer for dbussy_adapter.MandosBus"""
 
774
        def __init__(self, *args, **kwargs):
 
775
            self.object_cache = {}
 
776
            super(dbussy_adapter.CachingBus, self).__init__(*args,
 
777
                                                            **kwargs)
 
778
        def get_object(self, busname, objectpath):
 
779
            try:
 
780
                return self.object_cache[(busname, objectpath)]
 
781
            except KeyError:
 
782
                new_object = super(
 
783
                    dbussy_adapter.CachingBus,
 
784
                    self).get_object(busname, objectpath)
 
785
                self.object_cache[(busname, objectpath)]  = new_object
 
786
                return new_object
 
787
 
 
788
 
685
789
def commands_from_options(options):
686
790
 
687
791
    commands = list(options.commands)
1530
1634
        finally:
1531
1635
            dbus_logger.removeFilter(counting_handler)
1532
1636
 
1533
 
        self.assertNotIsInstance(e, dbus.ConnectFailed)
 
1637
        self.assertNotIsInstance(e.exception, dbus.ConnectFailed)
1534
1638
 
1535
1639
        # Make sure the dbus logger was suppressed
1536
1640
        self.assertEqual(0, counting_handler.count)
1673
1777
            self.call_method(bus, "methodname", "busname",
1674
1778
                             "objectpath", "interface")
1675
1779
 
1676
 
        self.assertNotIsInstance(e, dbus.ConnectFailed)
 
1780
        self.assertNotIsInstance(e.exception, dbus.ConnectFailed)
1677
1781
 
1678
1782
    def test_get_converts_to_correct_exception(self):
1679
1783
        bus = pydbus_adapter.SystemBus(
1774
1878
        self.assertIs(obj1, obj1b)
1775
1879
 
1776
1880
 
 
1881
class Test_dbussy_adapter_SystemBus(TestCaseWithAssertLogs):
 
1882
 
 
1883
    class dummy_dbussy:
 
1884
        class DBUS:
 
1885
            class ObjectPath(str):
 
1886
                pass
 
1887
        class DBusError(Exception):
 
1888
            pass
 
1889
 
 
1890
    def fake_ravel_func(self, func):
 
1891
        class fake_ravel:
 
1892
            @staticmethod
 
1893
            def system_bus():
 
1894
                class DBusInterfaceProxy:
 
1895
                    @staticmethod
 
1896
                    def methodname(*args):
 
1897
                        return [func(*args)]
 
1898
                class DBusObject:
 
1899
                    @staticmethod
 
1900
                    def get_interface(interface):
 
1901
                        if interface == "interface":
 
1902
                            return DBusInterfaceProxy()
 
1903
                return {"busname": {"objectpath": DBusObject()}}
 
1904
        return fake_ravel
 
1905
 
 
1906
    def call_method(self, bus, methodname, busname, objectpath,
 
1907
                    interface, *args):
 
1908
        with self.assertLogs(log, logging.DEBUG):
 
1909
            return bus.call_method(methodname, busname, objectpath,
 
1910
                                   interface, *args)
 
1911
 
 
1912
    def test_call_method_returns(self):
 
1913
        expected_method_return = Unique()
 
1914
        method_args = (Unique(), Unique())
 
1915
        def func(*args):
 
1916
            self.assertEqual(len(method_args), len(args))
 
1917
            for marg, arg in zip(method_args, args):
 
1918
                self.assertIs(marg, arg)
 
1919
            return expected_method_return
 
1920
        fake_ravel = self.fake_ravel_func(func)
 
1921
        bus = dbussy_adapter.SystemBus(self.dummy_dbussy, fake_ravel)
 
1922
        ret = self.call_method(bus, "methodname", "busname",
 
1923
                               "objectpath", "interface",
 
1924
                               *method_args)
 
1925
        self.assertIs(ret, expected_method_return)
 
1926
 
 
1927
    def test_call_method_filters_objectpath(self):
 
1928
        def func():
 
1929
            return method_return
 
1930
        fake_ravel = self.fake_ravel_func(func)
 
1931
        bus = dbussy_adapter.SystemBus(self.dummy_dbussy, fake_ravel)
 
1932
        method_return = (self.dummy_dbussy.DBUS
 
1933
                         .ObjectPath("objectpath"))
 
1934
        ret = self.call_method(bus, "methodname", "busname",
 
1935
                               "objectpath", "interface")
 
1936
        self.assertEqual("objectpath", ret)
 
1937
        self.assertNotIsInstance(ret,
 
1938
                                 self.dummy_dbussy.DBUS.ObjectPath)
 
1939
 
 
1940
    def test_call_method_filters_objectpaths_in_dict(self):
 
1941
        ObjectPath = self.dummy_dbussy.DBUS.ObjectPath
 
1942
        def func():
 
1943
            return method_return
 
1944
        fake_ravel = self.fake_ravel_func(func)
 
1945
        bus = dbussy_adapter.SystemBus(self.dummy_dbussy, fake_ravel)
 
1946
        method_return = {
 
1947
            ObjectPath("objectpath_key_1"):
 
1948
            ObjectPath("objectpath_value_1"),
 
1949
            ObjectPath("objectpath_key_2"):
 
1950
            ObjectPath("objectpath_value_2"),
 
1951
        }
 
1952
        ret = self.call_method(bus, "methodname", "busname",
 
1953
                               "objectpath", "interface")
 
1954
        expected_method_return = {str(key): str(value)
 
1955
                                  for key, value in
 
1956
                                  method_return.items()}
 
1957
        for key, value in ret.items():
 
1958
            self.assertNotIsInstance(key, ObjectPath)
 
1959
            self.assertNotIsInstance(value, ObjectPath)
 
1960
        self.assertEqual(expected_method_return, ret)
 
1961
        self.assertIsInstance(ret, dict)
 
1962
 
 
1963
    def test_call_method_filters_objectpaths_in_dict_in_dict(self):
 
1964
        ObjectPath = self.dummy_dbussy.DBUS.ObjectPath
 
1965
        def func():
 
1966
            return method_return
 
1967
        fake_ravel = self.fake_ravel_func(func)
 
1968
        bus = dbussy_adapter.SystemBus(self.dummy_dbussy, fake_ravel)
 
1969
        method_return = {
 
1970
            ObjectPath("key1"): {
 
1971
                ObjectPath("key11"): ObjectPath("value11"),
 
1972
                ObjectPath("key12"): ObjectPath("value12"),
 
1973
            },
 
1974
            ObjectPath("key2"): {
 
1975
                ObjectPath("key21"): ObjectPath("value21"),
 
1976
                ObjectPath("key22"): ObjectPath("value22"),
 
1977
            },
 
1978
        }
 
1979
        ret = self.call_method(bus, "methodname", "busname",
 
1980
                               "objectpath", "interface")
 
1981
        expected_method_return = {
 
1982
            "key1": {"key11": "value11",
 
1983
                     "key12": "value12"},
 
1984
            "key2": {"key21": "value21",
 
1985
                     "key22": "value22"},
 
1986
        }
 
1987
        self.assertEqual(expected_method_return, ret)
 
1988
        for key, value in ret.items():
 
1989
            self.assertIsInstance(value, dict)
 
1990
            self.assertEqual(expected_method_return[key], value)
 
1991
            self.assertNotIsInstance(key, ObjectPath)
 
1992
            for inner_key, inner_value in value.items():
 
1993
                self.assertIsInstance(value, dict)
 
1994
                self.assertEqual(
 
1995
                    expected_method_return[key][inner_key],
 
1996
                    inner_value)
 
1997
                self.assertNotIsInstance(key, ObjectPath)
 
1998
 
 
1999
    def test_call_method_filters_objectpaths_in_dict_three_deep(self):
 
2000
        ObjectPath = self.dummy_dbussy.DBUS.ObjectPath
 
2001
        def func():
 
2002
            return method_return
 
2003
        fake_ravel = self.fake_ravel_func(func)
 
2004
        bus = dbussy_adapter.SystemBus(self.dummy_dbussy, fake_ravel)
 
2005
        method_return = {
 
2006
            ObjectPath("key1"): {
 
2007
                ObjectPath("key2"): {
 
2008
                    ObjectPath("key3"): ObjectPath("value"),
 
2009
                },
 
2010
            },
 
2011
        }
 
2012
        ret = self.call_method(bus, "methodname", "busname",
 
2013
                               "objectpath", "interface")
 
2014
        expected_method_return = {"key1": {"key2": {"key3": "value"}}}
 
2015
        self.assertEqual(expected_method_return, ret)
 
2016
        self.assertIsInstance(ret, dict)
 
2017
        self.assertNotIsInstance(next(iter(ret.keys())), ObjectPath)
 
2018
        self.assertIsInstance(ret["key1"], dict)
 
2019
        self.assertNotIsInstance(next(iter(ret["key1"].keys())),
 
2020
                                 ObjectPath)
 
2021
        self.assertIsInstance(ret["key1"]["key2"], dict)
 
2022
        self.assertNotIsInstance(
 
2023
            next(iter(ret["key1"]["key2"].keys())),
 
2024
            ObjectPath)
 
2025
        self.assertEqual("value", ret["key1"]["key2"]["key3"])
 
2026
        self.assertNotIsInstance(ret["key1"]["key2"]["key3"],
 
2027
                                 self.dummy_dbussy.DBUS.ObjectPath)
 
2028
 
 
2029
    def test_call_method_handles_exception(self):
 
2030
        def func():
 
2031
            raise self.dummy_dbussy.DBusError()
 
2032
 
 
2033
        fake_ravel = self.fake_ravel_func(func)
 
2034
        bus = dbussy_adapter.SystemBus(self.dummy_dbussy, fake_ravel)
 
2035
 
 
2036
        with self.assertRaises(dbus.Error) as e:
 
2037
            self.call_method(bus, "methodname", "busname",
 
2038
                             "objectpath", "interface")
 
2039
 
 
2040
        self.assertNotIsInstance(e.exception, dbus.ConnectFailed)
 
2041
 
 
2042
    def test_get_object_converts_to_correct_exception(self):
 
2043
        class fake_ravel_raises_exception_on_connect:
 
2044
            @staticmethod
 
2045
            def system_bus():
 
2046
                class Bus:
 
2047
                    @staticmethod
 
2048
                    def __getitem__(key):
 
2049
                        if key == "objectpath":
 
2050
                            raise self.dummy_dbussy.DBusError()
 
2051
                        raise Exception(key)
 
2052
                return {"busname": Bus()}
 
2053
        def func():
 
2054
            raise self.dummy_dbussy.DBusError()
 
2055
        bus = dbussy_adapter.SystemBus(
 
2056
            self.dummy_dbussy,
 
2057
            fake_ravel_raises_exception_on_connect)
 
2058
        with self.assertRaises(dbus.ConnectFailed):
 
2059
            self.call_method(bus, "methodname", "busname",
 
2060
                             "objectpath", "interface")
 
2061
 
 
2062
 
1777
2063
class Test_commands_from_options(unittest.TestCase):
1778
2064
 
1779
2065
    def setUp(self):