/usr/share/pynslcd/attmap.py is in pynslcd 0.9.7-2+deb9u1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 | # attmap.py - attribute mapping class
#
# Copyright (C) 2011, 2012, 2013 Arthur de Jong
#
# This library 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.
#
# This library 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 this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA
"""Module for handling attribute mappings used for LDAP searches.
>>> attrs = Attributes(uid='uid',
... userPassword='userPassword',
... uidNumber='uidNumber',
... gidNumber='gidNumber',
... gecos='"${gecos:-$cn}"',
... homeDirectory='homeDirectory',
... loginShell='loginShell')
>>> 'cn' in attrs.attributes()
True
>>> attrs.translate({'uid': ['UIDVALUE', '2nduidvalue'], 'cn': ['COMMON NAME', ]})
{'uid': ['UIDVALUE', '2nduidvalue'], 'loginShell': [], 'userPassword': [], 'uidNumber': [], 'gidNumber': [], 'gecos': ['COMMON NAME'], 'homeDirectory': []}
>>> attrs['uidNumber'] # a representation fit for logging and filters
'uidNumber'
>>> attrs['gecos']
'"${gecos:-$cn}"'
"""
import re
from ldap.filter import escape_filter_chars
import ldap.dn
from expr import Expression
# exported names
__all__ = ('Attributes', )
# TODO: support objectSid attributes
# regular expression to match function attributes
attribute_func_re = re.compile('^(?P<function>[a-z]+)\((?P<attribute>.*)\)$')
class SimpleMapping(str):
"""Simple mapping to another attribute name."""
def attributes(self):
return [self]
def mk_filter(self, value):
return '(%s=%s)' % (
self, escape_filter_chars(str(value))
)
def values(self, variables):
"""Expand the expression using the variables specified."""
return variables.get(self, [])
class ExpressionMapping(str):
"""Class for parsing and expanding an expression."""
def __init__(self, value):
"""Parse the expression as a string."""
self.expression = Expression(value[1:-1])
super(ExpressionMapping, self).__init__(value)
def values(self, variables):
"""Expand the expression using the variables specified."""
return [self.expression.value(variables)]
def attributes(self):
"""Return the attributes defined in the expression."""
return self.expression.variables()
class FunctionMapping(str):
"""Mapping to a function to another attribute."""
def __init__(self, mapping):
self.mapping = mapping
m = attribute_func_re.match(mapping)
self.attribute = m.group('attribute')
self.function = getattr(self, m.group('function'))
super(FunctionMapping, self).__init__(mapping)
def upper(self, value):
return value.upper()
def lower(self, value):
return value.lower()
def attributes(self):
return [self.attribute]
def mk_filter(self, value):
return '(%s=%s)' % (
self.attribute, escape_filter_chars(value)
)
def values(self, variables):
return [self.function(value)
for value in variables.get(self.attribute, [])]
class Attributes(dict):
"""Dictionary-like class for handling attribute mapping."""
def __init__(self, *args, **kwargs):
self.update(*args, **kwargs)
def __setitem__(self, attribute, mapping):
# translate the mapping into a mapping object
if mapping[0] == '"' and mapping[-1] == '"':
mapping = ExpressionMapping(mapping)
elif '(' in mapping:
mapping = FunctionMapping(mapping)
else:
mapping = SimpleMapping(mapping)
super(Attributes, self).__setitem__(attribute, mapping)
def update(self, *args, **kwargs):
for arg in args:
other = dict(arg)
for key in other:
self[key] = other[key]
for key in kwargs:
self[key] = kwargs[key]
def attributes(self):
"""Return the list of attributes that are referenced in this
attribute mapping. These are the attributes that should be
requested in the search."""
attributes = set()
for mapping in self.itervalues():
attributes.update(mapping.attributes())
return list(attributes)
def mk_filter(self, attribute, value):
"""Construct a search filter for searching for the attribute value
combination."""
mapping = self.get(attribute, SimpleMapping(attribute))
return mapping.mk_filter(value)
def translate(self, variables):
"""Return a dictionary with every attribute mapped to their value from
the specified variables."""
results = dict()
for attribute, mapping in self.iteritems():
results[attribute] = mapping.values(variables)
return results
def get_rdn_value(self, dn, attribute):
"""Extract the attribute value from from DN if possible. Return None
otherwise."""
return self.translate(dict(
(x, [y])
for x, y, z in ldap.dn.str2dn(dn)[0]
))[attribute][0]
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