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#!/usr/bin/env python3
# Copyright 2014-2015, Tresys Technology, LLC
#
# SPDX-License-Identifier: GPL-2.0-only
#
import setools
import argparse
import sys
import logging
import signal
import warnings
signal.signal(signal.SIGPIPE, signal.SIG_DFL)
parser = argparse.ArgumentParser(
description="SELinux policy rule search tool.",
epilog="TE/MLS rule searches cannot be mixed with RBAC rule searches.")
parser.add_argument("--version", action="version", version=setools.__version__)
parser.add_argument("policy", help="Path to the SELinux policy to search.", nargs="?")
parser.add_argument("-v", "--verbose", action="store_true",
help="Print extra informational messages")
parser.add_argument("--debug", action="store_true", dest="debug", help="Enable debugging.")
rtypes = parser.add_argument_group("TE Rule Types")
rtypes.add_argument("-A", action="store_true", help="Search allow and allowxperm rules.")
rtypes.add_argument("--allow", action="append_const",
const=setools.TERuletype.allow, dest="tertypes",
help="Search allow rules.")
rtypes.add_argument("--allowxperm", action="append_const",
const=setools.TERuletype.allowxperm, dest="tertypes",
help="Search allowxperm rules.")
rtypes.add_argument("--auditallow", action="append_const",
const=setools.TERuletype.auditallow, dest="tertypes",
help="Search auditallow rules.")
rtypes.add_argument("--auditallowxperm", action="append_const",
const=setools.TERuletype.auditallowxperm, dest="tertypes",
help="Search auditallowxperm rules.")
rtypes.add_argument("--dontaudit", action="append_const",
const=setools.TERuletype.dontaudit, dest="tertypes",
help="Search dontaudit rules.")
rtypes.add_argument("--dontauditxperm", action="append_const",
const=setools.TERuletype.dontauditxperm, dest="tertypes",
help="Search dontauditxperm rules.")
# rtypes.add_argument("--neverallow", action="append_const",
# const=setools.TERuletype.neverallow, dest="tertypes",
# help="Search neverallow rules.")
# rtypes.add_argument("--neverallowxperm", action="append_const",
# const=setools.TERuletype.neverallowxperm, dest="tertypes",
# help="Search neverallowxperm rules.")
rtypes.add_argument("-T", "--type_transition", action="append_const",
const=setools.TERuletype.type_transition, dest="tertypes",
help="Search type_transition rules.")
rtypes.add_argument("--type_change", action="append_const",
const=setools.TERuletype.type_change, dest="tertypes",
help="Search type_change rules.")
rtypes.add_argument("--type_member", action="append_const",
const=setools.TERuletype.type_member, dest="tertypes",
help="Search type_member rules.")
rbacrtypes = parser.add_argument_group("RBAC Rule Types")
rbacrtypes.add_argument("--role_allow", action="append_const",
const=setools.RBACRuletype.allow, dest="rbacrtypes",
help="Search role allow rules.")
rbacrtypes.add_argument("--role_transition", action="append_const",
const=setools.RBACRuletype.role_transition, dest="rbacrtypes",
help="Search role_transition rules.")
mlsrtypes = parser.add_argument_group("MLS Rule Types")
mlsrtypes.add_argument("--range_transition", action="append_const",
const=setools.MLSRuletype.range_transition, dest="mlsrtypes",
help="Search range_transition rules.")
expr = parser.add_argument_group("Expressions")
expr.add_argument("-s", "--source",
help="Source type/role of the TE/RBAC rule.")
expr.add_argument("-t", "--target",
help="Target type/role of the TE/RBAC rule.")
expr.add_argument("-c", "--class", dest="tclass",
help="Comma separated list of object classes")
expr.add_argument("-p", "--perms", metavar="PERMS",
help="Comma separated list of permissions. (TE rule searches only.)")
expr.add_argument("-x", "--xperms", metavar="XPERMS",
help="Comma separated list of extended permissions. (TE rule searches only.)")
expr.add_argument("-D", "--default",
help="Default of the rule. (type/role/range transition rules)")
expr.add_argument("-b", "--bool", dest="boolean", metavar="BOOL",
help="Comma separated list of Booleans in the conditional expression. "
"(TE rule searches only.)")
opts = parser.add_argument_group("Search options")
opts.add_argument("-eb", action="store_true", dest="boolean_equal",
help="Match Boolean list exactly instead of matching any listed Boolean.")
opts.add_argument("-ep", action="store_true", dest="perms_equal",
help="Match permission set exactly instead of matching any listed permission.")
opts.add_argument("-ex", action="store_true", dest="xperms_equal",
help="Match extended permission set exactly instead of matching any listed "
"permission.")
opts.add_argument("-Sp", action="store_true", dest="perms_subset",
help="Match rules where the listed permissions are a subset of the rule "
"permissions.")
opts.add_argument("-ds", action="store_false", dest="source_indirect",
help="Match source attributes directly instead of matching member types/roles.")
opts.add_argument("-dt", action="store_false", dest="target_indirect",
help="Match target attributes directly instead of matching member types/roles.")
opts.add_argument("-rs", action="store_true", dest="source_regex",
help="Use regular expression matching for the source type/role.")
opts.add_argument("-rt", action="store_true", dest="target_regex",
help="Use regular expression matching for the target type/role.")
opts.add_argument("-rc", action="store_true", dest="tclass_regex",
help="Use regular expression matching for the object class.")
opts.add_argument("-rd", action="store_true", dest="default_regex",
help="Use regular expression matching for the default type/role.")
opts.add_argument("-rb", action="store_true", dest="boolean_regex",
help="Use regular expression matching for Booleans.")
args = parser.parse_args()
if args.A:
try:
args.tertypes.extend([setools.TERuletype.allow, setools.TERuletype.allowxperm])
except AttributeError:
args.tertypes = [setools.TERuletype.allow, setools.TERuletype.allowxperm]
if not any((args.tertypes, args.mlsrtypes, args.rbacrtypes)):
parser.error("At least one rule type must be specified.")
if any((args.perms, args.xperms, args.boolean)) and any((args.rbacrtypes, args.mlsrtypes)):
parser.error("-p/--perms, -x/--xperms, and -b/--bool options are only supported "
"with TE rule searches.")
if args.debug:
logging.basicConfig(level=logging.DEBUG,
format='%(asctime)s|%(levelname)s|%(name)s|%(message)s')
if not sys.warnoptions:
warnings.simplefilter("default")
elif args.verbose:
logging.basicConfig(level=logging.INFO, format='%(message)s')
if not sys.warnoptions:
warnings.simplefilter("default")
else:
logging.basicConfig(level=logging.WARNING, format='%(message)s')
if not sys.warnoptions:
warnings.simplefilter("ignore")
try:
p = setools.SELinuxPolicy(args.policy)
if args.tertypes:
terq = setools.TERuleQuery(p,
ruletype=args.tertypes,
source=args.source,
source_indirect=args.source_indirect,
source_regex=args.source_regex,
target=args.target,
target_indirect=args.target_indirect,
target_regex=args.target_regex,
tclass_regex=args.tclass_regex,
perms_equal=args.perms_equal,
perms_subset=args.perms_subset,
xperms_equal=args.xperms_equal,
default=args.default,
default_regex=args.default_regex,
boolean_regex=args.boolean_regex,
boolean_equal=args.boolean_equal)
# these are broken out from the above statement to prevent making a list
# with an empty string in it (split on empty string)
if args.tclass:
if args.tclass_regex:
terq.tclass = args.tclass
else:
terq.tclass = args.tclass.split(",")
if args.perms:
terq.perms = args.perms.split(",")
if args.xperms:
terq.xperms = setools.xperm_str_to_tuple_ranges(args.xperms)
if args.boolean:
if args.boolean_regex:
terq.boolean = args.boolean
else:
if args.policy:
terq.boolean = args.boolean.split(",")
else:
# try to find substitutions for old boolean names
terq.boolean = map(setools.policyrep.lookup_boolean_name_sub,
args.boolean.split(","))
for te_result in sorted(terq.results()):
print(te_result)
if args.rbacrtypes:
rbacrq = setools.RBACRuleQuery(p,
ruletype=args.rbacrtypes,
source=args.source,
source_indirect=args.source_indirect,
source_regex=args.source_regex,
target=args.target,
target_indirect=args.target_indirect,
target_regex=args.target_regex,
default=args.default,
default_regex=args.default_regex,
tclass_regex=args.tclass_regex)
# these are broken out from the above statement to prevent making a list
# with an empty string in it (split on empty string)
if args.tclass:
if args.tclass_regex:
rbacrq.tclass = args.tclass
else:
rbacrq.tclass = args.tclass.split(",")
for rbac_result in sorted(rbacrq.results()):
print(rbac_result)
if args.mlsrtypes:
mlsrq = setools.MLSRuleQuery(p,
ruletype=args.mlsrtypes,
source=args.source,
source_indirect=args.source_indirect,
source_regex=args.source_regex,
target=args.target,
target_indirect=args.target_indirect,
target_regex=args.target_regex,
tclass_regex=args.tclass_regex,
default=args.default)
# these are broken out from the above statement to prevent making a list
# with an empty string in it (split on empty string)
if args.tclass:
if args.tclass_regex:
mlsrq.tclass = args.tclass
else:
mlsrq.tclass = args.tclass.split(",")
for mls_result in sorted(mlsrq.results()):
print(mls_result)
except AssertionError:
# Always provide a traceback for assertion errors
raise
except Exception as err:
if args.debug:
raise
else:
print(err)
sys.exit(1)
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