# Authors: Karl MacMillan <kmacmillan@mentalrootkit.com>
#
# Copyright (C) 2006 Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2 only
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
import unittest
import sepolgen.audit
import sepolgen.refpolicy
# syslog message
audit1 = """Sep 12 08:26:43 dhcp83-5 kernel: audit(1158064002.046:4): avc: denied { read } for pid=2 496 comm="bluez-pin" name=".gdm1K3IFT" dev=dm-0 ino=3601333 scontext=user_u:system_r:bluetooth_helper_t:s0-s0:c0 tcontext=system_u:object_r:xdm_tmp_t:s0 tclass=file"""
# audit daemon messages
audit2 = """type=AVC msg=audit(1158584779.745:708): avc: denied { dac_read_search } for pid=8132 comm="sh" capability=2 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability"""
log1 = """type=AVC msg=audit(1158584779.745:708): avc: denied { dac_read_search } for pid=8132 comm="sh" capability=2 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
type=SYSCALL msg=audit(1158584779.745:708): arch=40000003 syscall=195 success=no exit=-13 a0=80d2437 a1=bf9132f8 a2=4c56cff4 a3=0 items=0 ppid=8131 pid=8132 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) comm="sh" exe="/bin/bash" subj=user_u:system_r:vpnc_t:s0 key=(null)
type=AVC msg=audit(1158584779.753:709): avc: denied { dac_override } for pid=8133 comm="vpnc-script" capability=1 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
type=AVC msg=audit(1158584779.753:709): avc: denied { dac_read_search } for pid=8133 comm="vpnc-script" capability=2 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
type=SYSCALL msg=audit(1158584779.753:709): arch=40000003 syscall=195 success=no exit=-13 a0=80d2437 a1=bf910a48 a2=4c56cff4 a3=0 items=0 ppid=8132 pid=8133 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) comm="vpnc-script" exe="/bin/bash" subj=user_u:system_r:vpnc_t:s0 key=(null)
type=AVC msg=audit(1158584779.825:710): avc: denied { dac_override } for pid=8134 comm="vpnc-script" capability=1 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
type=AVC msg=audit(1158584779.825:710): avc: denied { dac_read_search } for pid=8134 comm="vpnc-script" capability=2 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
type=SYSCALL msg=audit(1158584779.825:710): arch=40000003 syscall=195 success=no exit=-13 a0=80d2437 a1=bf910a48 a2=4c56cff4 a3=0 items=0 ppid=8132 pid=8134 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) comm="vpnc-script" exe="/bin/bash" subj=user_u:system_r:vpnc_t:s0 key=(null)
type=AVC msg=audit(1158584780.793:711): avc: denied { dac_override } for pid=8144 comm="sh" capability=1 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
type=AVC msg=audit(1158584780.793:711): avc: denied { dac_read_search } for pid=8144 comm="sh" capability=2 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
type=SYSCALL msg=audit(1158584780.793:711): arch=40000003 syscall=195 success=no exit=-13 a0=80d2437 a1=bfc0ba38 a2=4c56cff4 a3=0 items=0 ppid=8131 pid=8144 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) comm="sh" exe="/bin/bash" subj=user_u:system_r:vpnc_t:s0 key=(null)
type=AVC msg=audit(1158584780.797:712): avc: denied { dac_override } for pid=8145 comm="vpnc-script" capability=1 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
type=AVC msg=audit(1158584780.797:712): avc: denied { dac_read_search } for pid=8145 comm="vpnc-script" capability=2 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
type=SYSCALL msg=audit(1158584780.797:712): arch=40000003 syscall=195 success=no exit=-13 a0=80d2437 a1=bfc0b188 a2=4c56cff4 a3=0 items=0 ppid=8144 pid=8145 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) comm="vpnc-script" exe="/bin/bash" subj=user_u:system_r:vpnc_t:s0 key=(null)
type=AVC msg=audit(1158584780.801:713): avc: denied { dac_override } for pid=8146 comm="vpnc-script" capability=1 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
type=AVC msg=audit(1158584780.801:713): avc: denied { dac_read_search } for pid=8146 comm="vpnc-script" capability=2 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
type=AVC_PATH msg=audit(1162850461.778:1113): path="/etc/rc.d/init.d/innd"
"""
granted1 = """type=AVC msg=audit(1188833848.190:34): avc: granted { getattr } for pid=4310 comm="ls" name="foo.pp" dev=sda5 ino=295171 scontext=user_u:system_r:unconfined_t:s0 tcontext=user_u:object_r:user_home_t:s0 tclass=file"""
path1 = """type=AVC_PATH msg=audit(1162852201.019:1225): path="/usr/lib/sa/sa1"
"""
log2 = """type=AVC_PATH msg=audit(1162852201.019:1225): path="/usr/lib/sa/sa1"
type=SYSCALL msg=audit(1162852201.019:1225): arch=40000003 syscall=11 success=yes exit=0 a0=87271b0 a1=8727358 a2=8727290 a3=8727008 items=0 ppid=6973 pid=6974 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) comm="sa1" exe="/bin/bash" subj=system_u:system_r:crond_t:s0-s0:c0.c1023 key=(null)
type=AVC msg=audit(1162852201.019:1225): avc: denied { execute_no_trans } for pid=6974 comm="sh" name="sa1" dev=dm-0 ino=13061698 scontext=system_u:system_r:crond_t:s0-s0:c0.c1023 tcontext=system_u:object_r:lib_t:s0 tclass=file
type=AVC msg=audit(1162852201.019:1225): avc: denied { execute } for pid=6974 comm="sh" name="sa1" dev=dm-0 ino=13061698 scontext=system_u:system_r:crond_t:s0-s0:c0.c1023 tcontext=system_u:object_r:lib_t:s0 tclass=file"""
xperms1 = """type=AVC msg=audit(1516626657.910:4461): avc: denied { ioctl } for pid=4310 comm="test" path="/root/test" ino=8619937 ioctlcmd=0x42 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:test_file_t:s0 tclass=file permissive=0
"""
xperms2 = """type=AVC msg=audit(1516626657.910:4461): avc: denied { ioctl } for pid=4310 comm="test" path="/root/test" ino=8619937 ioctlcmd=0x42 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:test_file_t:s0 tclass=file permissive=0
type=AVC msg=audit(1516626657.910:4461): avc: denied { ioctl } for pid=4310 comm="test" path="/root/test" ino=8619937 ioctlcmd=0x1234 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:test_file_t:s0 tclass=file permissive=0
type=AVC msg=audit(1516626657.910:4461): avc: denied { ioctl } for pid=4310 comm="test" path="/root/test" ino=8619937 ioctlcmd=0xdead scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:test_file_t:s0 tclass=file permissive=0
type=AVC msg=audit(1516626657.910:4461): avc: denied { getattr } for pid=4310 comm="test" path="/root/test" ino=8619937 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:test_file_t:s0 tclass=dir permissive=0
"""
xperms_invalid = """type=AVC msg=audit(1516626657.910:4461): avc: denied { ioctl } for pid=4310 comm="test" path="/root/test" ino=8619937 ioctlcmd=asdf scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:test_file_t:s0 tclass=file permissive=0
"""
xperms_without = """type=AVC msg=audit(1516626657.910:4461): avc: denied { ioctl } for pid=4310 comm="test" path="/root/test" ino=8619937 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:test_file_t:s0 tclass=file permissive=0
"""
class TestAVCMessage(unittest.TestCase):
def test_defs(self):
avc = sepolgen.audit.AVCMessage(audit1)
sc = sepolgen.refpolicy.SecurityContext()
self.assertEqual(avc.scontext, sc)
self.assertEqual(avc.tcontext, sc)
self.assertEqual(avc.tclass, "")
self.assertEqual(avc.accesses, [])
self.assertEqual(avc.ioctlcmd, None)
def test_granted(self):
avc = sepolgen.audit.AVCMessage(granted1)
avc.from_split_string(granted1.split())
self.assertEqual(avc.scontext.user, "user_u")
self.assertEqual(avc.scontext.role, "system_r")
self.assertEqual(avc.scontext.type, "unconfined_t")
self.assertEqual(avc.scontext.level, "s0")
self.assertEqual(avc.tcontext.user, "user_u")
self.assertEqual(avc.tcontext.role, "object_r")
self.assertEqual(avc.tcontext.type, "user_home_t")
self.assertEqual(avc.tcontext.level, "s0")
self.assertEqual(avc.tclass, "file")
self.assertEqual(avc.accesses, ["getattr"])
self.assertEqual(avc.denial, False)
def test_xperms(self):
"""Test that the ioctlcmd field is parsed"""
avc = sepolgen.audit.AVCMessage(xperms1)
recs = xperms1.split()
avc.from_split_string(recs)
self.assertEqual(avc.ioctlcmd, 66)
def test_xperms_invalid(self):
"""Test message with invalid value in the ioctlcmd field"""
avc = sepolgen.audit.AVCMessage(xperms_invalid)
recs = xperms_invalid.split()
avc.from_split_string(recs)
self.assertIsNone(avc.ioctlcmd)
def test_xperms_without(self):
"""Test message without the ioctlcmd field"""
avc = sepolgen.audit.AVCMessage(xperms_without)
recs = xperms_without.split()
avc.from_split_string(recs)
self.assertIsNone(avc.ioctlcmd)
def test_from_split_string(self):
# syslog message
avc = sepolgen.audit.AVCMessage(audit1)
recs = audit1.split()
avc.from_split_string(recs)
self.assertEqual(avc.header, "audit(1158064002.046:4):")
self.assertEqual(avc.scontext.user, "user_u")
self.assertEqual(avc.scontext.role, "system_r")
self.assertEqual(avc.scontext.type, "bluetooth_helper_t")
self.assertEqual(avc.scontext.level, "s0-s0:c0")
self.assertEqual(avc.tcontext.user, "system_u")
self.assertEqual(avc.tcontext.role, "object_r")
self.assertEqual(avc.tcontext.type, "xdm_tmp_t")
self.assertEqual(avc.tcontext.level, "s0")
self.assertEqual(avc.tclass, "file")
self.assertEqual(avc.accesses, ["read"])
self.assertEqual(avc.comm, "bluez-pin")
self.assertEqual(avc.denial, True)
# audit daemon message
avc = sepolgen.audit.AVCMessage(audit2)
recs = audit2.split()
avc.from_split_string(recs)
self.assertEqual(avc.header, "audit(1158584779.745:708):")
self.assertEqual(avc.scontext.user, "user_u")
self.assertEqual(avc.scontext.role, "system_r")
self.assertEqual(avc.scontext.type, "vpnc_t")
self.assertEqual(avc.scontext.level, "s0")
self.assertEqual(avc.tcontext.user, "user_u")
self.assertEqual(avc.tcontext.role, "system_r")
self.assertEqual(avc.tcontext.type, "vpnc_t")
self.assertEqual(avc.tcontext.level, "s0")
self.assertEqual(avc.tclass, "capability")
self.assertEqual(avc.accesses, ["dac_read_search"])
self.assertEqual(avc.comm, "sh")
self.assertEqual(avc.denial, True)
class TestPathMessage(unittest.TestCase):
def test_from_split_string(self):
path = sepolgen.audit.PathMessage(path1)
recs = path1.split()
path.from_split_string(recs)
self.assertEqual(path.path, "/usr/lib/sa/sa1")
# TODO - add tests for the other message types
# TODO - these tests need a lot of expansion and more examples of
# different types of log files
class TestAuditParser(unittest.TestCase):
def test_parse_string(self):
a = sepolgen.audit.AuditParser()
a.parse_string(log1)
self.assertEqual(len(a.avc_msgs), 11)
self.assertEqual(len(a.compute_sid_msgs), 0)
self.assertEqual(len(a.invalid_msgs), 0)
self.assertEqual(len(a.policy_load_msgs), 0)
self.assertEqual(len(a.path_msgs), 1)
def test_post_process(self):
a = sepolgen.audit.AuditParser()
a.parse_string(log2)
self.assertEqual(len(a.avc_msgs), 2)
self.assertEqual(a.avc_msgs[0].path, "/usr/lib/sa/sa1")
self.assertEqual(a.avc_msgs[1].path, "/usr/lib/sa/sa1")
def test_parse_file(self):
f = open("audit.txt")
a = sepolgen.audit.AuditParser()
a.parse_file(f)
f.close()
self.assertEqual(len(a.avc_msgs), 21)
self.assertEqual(len(a.compute_sid_msgs), 0)
self.assertEqual(len(a.invalid_msgs), 0)
self.assertEqual(len(a.policy_load_msgs), 0)
def test_parse_xperms(self):
""" Test that correct access vectors are generated from a set of AVC
denial messages. """
a = sepolgen.audit.AuditParser()
a.parse_string(xperms2)
av_set = a.to_access()
self.assertEqual(len(av_set), 2)
av_list = list(sorted(av_set))
self.assertEqual(av_list[0].xperms, {})
self.assertEqual(list(av_list[1].xperms), ["ioctl"])
self.assertEqual(av_list[1].xperms["ioctl"].ranges, [(66,66),
(4660,4660), (57005,57005)])
class TestGeneration(unittest.TestCase):
def test_generation(self):
parser = sepolgen.audit.AuditParser()
parser.parse_string(log1)
avs = parser.to_access()
self.assertEqual(len(avs), 1)
def test_genaration_granted(self):
parser = sepolgen.audit.AuditParser()
parser.parse_string(granted1)
avs = parser.to_access()
self.assertEqual(len(avs), 0)
avs = parser.to_access(only_denials=False)
self.assertEqual(len(avs), 1)