/usr/lib/python3/dist-packages/ldap3/protocol/formatters/validators.py is in python3-ldap3 2.4.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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"""
# Created on 2016.08.09
#
# Author: Giovanni Cannata
#
# Copyright 2016 - 2018 Giovanni Cannata
#
# This file is part of ldap3.
#
# ldap3 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 3 of the License, or
# (at your option) any later version.
#
# ldap3 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 ldap3 in the COPYING and COPYING.LESSER files.
# If not, see <http://www.gnu.org/licenses/>.
from datetime import datetime
from calendar import timegm
from uuid import UUID
from ... import SEQUENCE_TYPES, STRING_TYPES
from .formatters import format_time, format_ad_timestamp
from ...utils.conv import to_raw, to_unicode
# Validators return True if value is valid, False if value is not valid,
# or a value different from True and False that is a valid value to substitute to the input value
def check_type(input_value, value_type):
if isinstance(input_value, value_type):
return True
if isinstance(input_value, SEQUENCE_TYPES):
for value in input_value:
if not isinstance(value, value_type):
return False
return True
return False
def always_valid(input_value):
return True
def validate_generic_single_value(input_value):
if not isinstance(input_value, SEQUENCE_TYPES):
return True
try: # object couldn't have a __len__ method
if len(input_value) == 1:
return True
except Exception:
pass
return False
def validate_minus_one(input_value):
"""Accept -1 only (used by pwdLastSet in AD)
"""
if not isinstance(input_value, SEQUENCE_TYPES):
if input_value == -1 or input_value == '-1':
return True
try: # object couldn't have a __len__ method
if len(input_value) == 1 and input_value == -1 or input_value == '-1':
return True
except Exception:
pass
return False
def validate_integer(input_value):
if check_type(input_value, (float, bool)):
return False
if str is bytes: # Python 2, check for long too
if check_type(input_value, (int, long)):
return True
else: # Python 3, int only
if check_type(input_value, int):
return True
sequence = True # indicates if a sequence must be returned
if not isinstance(input_value, SEQUENCE_TYPES):
sequence = False
input_value = [input_value]
else:
sequence = True # indicates if a sequence must be returned
valid_values = [] # builds a list of valid int values
from decimal import Decimal, InvalidOperation
for element in input_value:
try: # try to convert any type to int, an invalid conversion raise TypeError or ValueError, doublecheck with Decimal type, if both are valid and equal then then int() value is used
value = to_unicode(element) if isinstance(element, bytes) else element
decimal_value = Decimal(value)
int_value = int(value)
if decimal_value == int_value:
valid_values.append(int_value)
else:
return False
except (ValueError, TypeError, InvalidOperation):
return False
if sequence:
return valid_values
else:
return valid_values[0]
def validate_bytes(input_value):
return check_type(input_value, bytes)
def validate_boolean(input_value):
# it could be a real bool or the string TRUE or FALSE, # only a single valued is allowed
if validate_generic_single_value(input_value): # valid only if a single value or a sequence with a single element
if isinstance(input_value, SEQUENCE_TYPES):
input_value = input_value[0]
if isinstance(input_value, bool):
if input_value:
return 'TRUE'
else:
return 'FALSE'
if isinstance(input_value, STRING_TYPES):
if input_value.lower() == 'true':
return 'TRUE'
elif input_value.lower() == 'false':
return 'FALSE'
return False
def validate_time(input_value):
# if datetime object doesn't have a timezone it's considered local time and is adjusted to UTC
if not isinstance(input_value, SEQUENCE_TYPES):
sequence = False
input_value = [input_value]
else:
sequence = True # indicates if a sequence must be returned
valid_values = []
changed = False
for element in input_value:
if isinstance(element, STRING_TYPES): # tries to check if it is already be a Generalized Time
if isinstance(format_time(to_raw(element)), datetime): # valid Generalized Time string
valid_values.append(element)
else:
return False
elif isinstance(element, datetime):
changed = True
if element.tzinfo: # a datetime with a timezone
valid_values.append(element.strftime('%Y%m%d%H%M%S%z'))
else: # datetime without timezone, assumed local and adjusted to UTC
offset = datetime.now() - datetime.utcnow()
valid_values.append((element - offset).strftime('%Y%m%d%H%M%SZ'))
else:
return False
if changed:
if sequence:
return valid_values
else:
return valid_values[0]
else:
return True
def validate_ad_timestamp(input_value):
"""
Active Directory stores date/time values as the number of 100-nanosecond intervals
that have elapsed since the 0 hour on January 1, 1601 till the date/time that is being stored.
The time is always stored in Greenwich Mean Time (GMT) in the Active Directory.
"""
if not isinstance(input_value, SEQUENCE_TYPES):
sequence = False
input_value = [input_value]
else:
sequence = True # indicates if a sequence must be returned
valid_values = []
changed = False
for element in input_value:
if isinstance(element, STRING_TYPES): # tries to check if it is already be a AD timestamp
if isinstance(format_ad_timestamp(to_raw(element)), datetime): # valid Generalized Time string
valid_values.append(element)
else:
return False
elif isinstance(element, datetime):
changed = True
if element.tzinfo: # a datetime with a timezone
valid_values.append(to_raw((timegm((element).utctimetuple()) + 11644473600) * 10000000, encoding='ascii'))
else: # datetime without timezone, assumed local and adjusted to UTC
offset = datetime.now() - datetime.utcnow()
valid_values.append(to_raw((timegm((element - offset).timetuple()) + 11644473600) * 10000000, encoding='ascii'))
else:
return False
if changed:
if sequence:
return valid_values
else:
return valid_values[0]
else:
return True
def validate_uuid(input_value):
"""
object guid in uuid format
"""
if not isinstance(input_value, SEQUENCE_TYPES):
sequence = False
input_value = [input_value]
else:
sequence = True # indicates if a sequence must be returned
valid_values = []
changed = False
for element in input_value:
if isinstance(element, (bytes, bytearray)): # assumes bytes are valid
valid_values.append(element)
elif isinstance(element, STRING_TYPES):
try:
valid_values.append(UUID(element).bytes)
changed = True
except ValueError:
return False
else:
return False
if changed:
if sequence:
return valid_values
else:
return valid_values[0]
else:
return True
def validate_uuid_le(input_value):
"""
Active Directory stores objectGUID in uuid_le format
"""
if not isinstance(input_value, SEQUENCE_TYPES):
sequence = False
input_value = [input_value]
else:
sequence = True # indicates if a sequence must be returned
valid_values = []
changed = False
for element in input_value:
if isinstance(element, (bytes, bytearray)): # assumes bytes are valid
valid_values.append(element)
elif isinstance(element, STRING_TYPES):
try:
valid_values.append(UUID(element).bytes_le)
changed = True
except ValueError:
return False
else:
return False
if changed:
if sequence:
return valid_values
else:
return valid_values[0]
else:
return True
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