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# Copyright 2016, Tresys Technology, LLC
#
# This file is part of SETools.
#
# SETools is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 2.1 of
# the License, or (at your option) any later version.
#
# SETools 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with SETools.  If not, see
# <http://www.gnu.org/licenses/>.
#


def match_regex(obj, criteria, regex):
    """
    Match the object with optional regular expression.

    Parameters:
    obj         The object to match.
    criteria    The criteria to match.
    regex       If regular expression matching should be used.
    """

    if regex:
        return bool(criteria.search(str(obj)))
    else:
        return obj == criteria


def match_set(obj, criteria, equal):
    """
    Match the object (a set) with optional set equality.

    Parameters:
    obj         The object to match. (a set)
    criteria    The criteria to match. (a set)
    equal       If set equality should be used. Otherwise
                any set intersection will match.
    """

    if equal:
        return obj == criteria
    else:
        return bool(obj.intersection(criteria))


def match_in_set(obj, criteria, regex):
    """
    Match if the criteria is in the list, with optional
    regular expression matching.

    Parameters:
    obj         The object to match.
    criteria    The criteria to match.
    regex       If regular expression matching should be used.
    """

    if regex:
        return [m for m in obj if criteria.search(str(m))]
    else:
        return criteria in obj


def match_indirect_regex(obj, criteria, indirect, regex):
    """
    Match the object with optional regular expression and indirection.

    Parameters:
    obj         The object to match.
    criteria    The criteria to match.
    regex       If regular expression matching should be used.
    indirect    If object indirection should be used, e.g.
                expanding an attribute.
    """

    if indirect:
        if regex:
            return [o for o in obj.expand() if criteria.search(str(o))]
        else:
            return set(criteria.expand()).intersection(obj.expand())
    else:
        return match_regex(obj, criteria, regex)


def match_regex_or_set(obj, criteria, equal, regex):
    """
    Match the object (a set) with either set comparisons
    (equality or intersection) or by regex matching of the
    set members.  Regular expression matching will override
    the set equality option.

    Parameters:
    obj         The object to match. (a set)
    criteria    The criteria to match.
    equal       If set equality should be used.  Otherwise
                any set intersection will match. Ignored
                if regular expression matching is used.
    regex       If regular expression matching should be used.
    """

    if regex:
        return [m for m in obj if criteria.search(str(m))]
    else:
        return match_set(obj, set(criteria), equal)


def match_range(obj, criteria, subset, overlap, superset, proper):
    """
    Match ranges of objects.

    obj         An object with attributes named "low" and "high", representing the range.
    criteria    An object with attributes named "low" and "high", representing the criteria.
    subset      If true, the criteria will match if it is a subset obj's range.
    overlap     If true, the criteria will match if it overlaps any of the obj's range.
    superset    If true, the criteria will match if it is a superset of the obj's range.
    proper      If true, use proper superset/subset operations.
                No effect if not using set operations.
    """

    if overlap:
        return ((obj.low <= criteria.low <= obj.high) or (
            obj.low <= criteria.high <= obj.high) or (
            criteria.low <= obj.low and obj.high <= criteria.high))
    elif subset:
        if proper:
            return ((obj.low < criteria.low and criteria.high <= obj.high) or (
                obj.low <= criteria.low and criteria.high < obj.high))
        else:
            return obj.low <= criteria.low and criteria.high <= obj.high
    elif superset:
        if proper:
            return ((criteria.low < obj.low and obj.high <= criteria.high) or (
                criteria.low <= obj.low and obj.high < criteria.high))
        else:
            return (criteria.low <= obj.low and obj.high <= criteria.high)
    else:
        return criteria.low == obj.low and obj.high == criteria.high


def match_level(obj, criteria, dom, domby, incomp):
    """
    Match the an MLS level.

    obj         The level to match.
    criteria    The criteria to match. (a level)
    dom         If true, the criteria will match if it dominates obj.
    domby       If true, the criteria will match if it is dominated by obj.
    incomp      If true, the criteria will match if it is incomparable to obj.
    """

    if dom:
        return (criteria >= obj)
    elif domby:
        return (criteria <= obj)
    elif incomp:
        return (criteria ^ obj)
    else:
        return (criteria == obj)

Filemanager

Name Type Size Permission Actions
__pycache__ Folder 0755
diff Folder 0755
__init__.py File 2.79 KB 0644
boolquery.py File 2.19 KB 0644
boundsquery.py File 2.35 KB 0644
categoryquery.py File 1.88 KB 0644
commonquery.py File 2.11 KB 0644
constraintquery.py File 5.5 KB 0644
defaultquery.py File 2.8 KB 0644
descriptors.py File 7.47 KB 0644
devicetreeconquery.py File 2.72 KB 0644
dta.py File 21.4 KB 0644
exception.py File 5.97 KB 0644
fsusequery.py File 3.36 KB 0644
genfsconquery.py File 3.68 KB 0644
ibendportconquery.py File 3.52 KB 0644
ibpkeyconquery.py File 5.22 KB 0644
infoflow.py File 14.59 KB 0644
initsidquery.py File 2.79 KB 0644
iomemconquery.py File 4.44 KB 0644
ioportconquery.py File 4.46 KB 0644
mixins.py File 7.14 KB 0644
mlsrulequery.py File 4.59 KB 0644
netifconquery.py File 2.93 KB 0644
nodeconquery.py File 4.16 KB 0644
objclassquery.py File 3.78 KB 0644
pcideviceconquery.py File 3.04 KB 0644
perm_map File 87.16 KB 0644
permmap.py File 16.1 KB 0644
pirqconquery.py File 2.95 KB 0644
polcapquery.py File 1.64 KB 0644
policyrep.cpython-36m-x86_64-linux-gnu.so File 1.87 MB 0755
portconquery.py File 5.04 KB 0644
query.py File 1.69 KB 0644
rbacrulequery.py File 5.61 KB 0644
rolequery.py File 2.48 KB 0644
sensitivityquery.py File 2.65 KB 0644
terulequery.py File 9.11 KB 0644
typeattrquery.py File 2.62 KB 0644
typequery.py File 3.43 KB 0644
userquery.py File 4.68 KB 0644
util.py File 5.32 KB 0644