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Your IP : 216.73.216.158
"""
"""
# Created on 2013.07.24
#
# Author: Giovanni Cannata
#
# Copyright 2013 - 2020 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 pyasn1.error import PyAsn1Error
from .. import SEQUENCE_TYPES, STRING_TYPES, get_config_parameter
from ..core.exceptions import LDAPControlError, LDAPAttributeError, LDAPObjectClassError, LDAPInvalidValueError
from ..protocol.rfc4511 import Controls, Control
from ..utils.conv import to_raw, to_unicode, escape_filter_chars, is_filter_escaped
from ..protocol.formatters.standard import find_attribute_validator
def to_str_or_normalized_unicode(val):
""" Attempt to convert value to a string. If that would error, convert it to normalized unicode.
Python 3 string conversion handles unicode -> str without issue, but python 2 doesn't.
"""
try:
return str(val)
except:
return val.encode('ascii', 'backslashreplace')
def attribute_to_dict(attribute):
try:
return {'type': str(attribute['type']), 'values': [str(val) for val in attribute['vals']]}
except PyAsn1Error: # invalid encoding, return bytes value
return {'type': str(attribute['type']), 'values': [bytes(val) for val in attribute['vals']]}
def attributes_to_dict(attributes):
attributes_dict = dict()
for attribute in attributes:
attribute_dict = attribute_to_dict(attribute)
attributes_dict[attribute_dict['type']] = attribute_dict['values']
return attributes_dict
def referrals_to_list(referrals):
if isinstance(referrals, list):
return [to_str_or_normalized_unicode(referral) for referral in referrals if referral] if referrals else None
else:
return [to_str_or_normalized_unicode(referral) for referral in referrals if referral] if referrals is not None and referrals.hasValue() else None
def search_refs_to_list(search_refs):
return [to_str_or_normalized_unicode(search_ref) for search_ref in search_refs if search_ref] if search_refs else None
def search_refs_to_list_fast(search_refs):
return [to_unicode(search_ref) for search_ref in search_refs if search_ref] if search_refs else None
def sasl_to_dict(sasl):
return {'mechanism': str(sasl['mechanism']), 'credentials': bytes(sasl['credentials']) if sasl['credentials'] is not None and sasl['credentials'].hasValue() else None}
def authentication_choice_to_dict(authentication_choice):
return {'simple': str(authentication_choice['simple']) if authentication_choice.getName() == 'simple' else None, 'sasl': sasl_to_dict(authentication_choice['sasl']) if authentication_choice.getName() == 'sasl' else None}
def partial_attribute_to_dict(modification):
try:
return {'type': str(modification['type']), 'value': [str(value) for value in modification['vals']]}
except PyAsn1Error: # invalid encoding, return bytes value
return {'type': str(modification['type']), 'value': [bytes(value) for value in modification['vals']]}
def change_to_dict(change):
return {'operation': int(change['operation']), 'attribute': partial_attribute_to_dict(change['modification'])}
def changes_to_list(changes):
return [change_to_dict(change) for change in changes]
def attributes_to_list(attributes):
return [to_str_or_normalized_unicode(attribute) for attribute in attributes]
def ava_to_dict(ava):
try:
return {'attribute': str(ava['attributeDesc']), 'value': escape_filter_chars(str(ava['assertionValue']))}
except Exception: # invalid encoding, return bytes value
try:
return {'attribute': str(ava['attributeDesc']), 'value': escape_filter_chars(bytes(ava['assertionValue']))}
except Exception:
return {'attribute': str(ava['attributeDesc']), 'value': bytes(ava['assertionValue'])}
def substring_to_dict(substring):
return {'initial': substring['initial'] if substring['initial'] else '', 'any': [middle for middle in substring['any']] if substring['any'] else '', 'final': substring['final'] if substring['final'] else ''}
def prepare_changes_for_request(changes):
prepared = dict()
for change in changes:
attribute_name = change['attribute']['type']
if attribute_name not in prepared:
prepared[attribute_name] = []
prepared[attribute_name].append((change['operation'], change['attribute']['value']))
return prepared
def build_controls_list(controls):
"""controls is a sequence of Control() or sequences
each sequence must have 3 elements: the control OID, the criticality, the value
criticality must be a boolean
"""
if not controls:
return None
if not isinstance(controls, SEQUENCE_TYPES):
raise LDAPControlError('controls must be a sequence')
built_controls = Controls()
for idx, control in enumerate(controls):
if isinstance(control, Control):
built_controls.setComponentByPosition(idx, control)
elif len(control) == 3 and isinstance(control[1], bool):
built_control = Control()
built_control['controlType'] = control[0]
built_control['criticality'] = control[1]
if control[2] is not None:
built_control['controlValue'] = control[2]
built_controls.setComponentByPosition(idx, built_control)
else:
raise LDAPControlError('control must be a sequence of 3 elements: controlType, criticality (boolean) and controlValue (None if not provided)')
return built_controls
def validate_assertion_value(schema, name, value, auto_escape, auto_encode, validator, check_names):
value = to_unicode(value)
if auto_escape:
if '\\' in value and not is_filter_escaped(value):
value = escape_filter_chars(value)
value = validate_attribute_value(schema, name, value, auto_encode, validator=validator, check_names=check_names)
return value
def validate_attribute_value(schema, name, value, auto_encode, validator=None, check_names=False):
conf_classes_excluded_from_check = [v.lower() for v in get_config_parameter('CLASSES_EXCLUDED_FROM_CHECK')]
conf_attributes_excluded_from_check = [v.lower() for v in get_config_parameter('ATTRIBUTES_EXCLUDED_FROM_CHECK')]
conf_utf8_syntaxes = get_config_parameter('UTF8_ENCODED_SYNTAXES')
conf_utf8_types = [v.lower() for v in get_config_parameter('UTF8_ENCODED_TYPES')]
if schema and schema.attribute_types:
if ';' in name:
name = name.split(';')[0]
if check_names and schema.object_classes and name.lower() == 'objectclass':
if to_unicode(value).lower() not in conf_classes_excluded_from_check and to_unicode(value) not in schema.object_classes:
raise LDAPObjectClassError('invalid class in objectClass attribute: ' + str(value))
elif check_names and name not in schema.attribute_types and name.lower() not in conf_attributes_excluded_from_check:
raise LDAPAttributeError('invalid attribute ' + name)
else: # try standard validators
validator = find_attribute_validator(schema, name, validator)
validated = validator(value)
if validated is False:
try: # checks if the value is a byte value erroneously converted to a string (as "b'1234'"), this is a common case in Python 3 when encoding is not specified
if value[0:2] == "b'" and value [-1] == "'":
value = to_raw(value[2:-1])
validated = validator(value)
except Exception:
raise LDAPInvalidValueError('value \'%s\' non valid for attribute \'%s\'' % (value, name))
if validated is False:
raise LDAPInvalidValueError('value \'%s\' non valid for attribute \'%s\'' % (value, name))
elif validated is not True: # a valid LDAP value equivalent to the actual value
value = validated
# converts to utf-8 for well known Unicode LDAP syntaxes
if auto_encode and ((name in schema.attribute_types and schema.attribute_types[name].syntax in conf_utf8_syntaxes) or name.lower() in conf_utf8_types):
value = to_unicode(value) # tries to convert from local encoding to Unicode
return to_raw(value)
def prepare_filter_for_sending(raw_string):
i = 0
ints = []
raw_string = to_raw(raw_string)
while i < len(raw_string):
if (raw_string[i] == 92 or raw_string[i] == '\\') and i < len(raw_string) - 2: # 92 (0x5C) is backslash
try:
ints.append(int(raw_string[i + 1: i + 3], 16))
i += 2
except ValueError: # not an ldap escaped value, sends as is
ints.append(92) # adds backslash
else:
if str is not bytes: # Python 3
ints.append(raw_string[i])
else: # Python 2
ints.append(ord(raw_string[i]))
i += 1
if str is not bytes: # Python 3
return bytes(ints)
else: # Python 2
return ''.join(chr(x) for x in ints)
def prepare_for_sending(raw_string):
return to_raw(raw_string) if isinstance(raw_string, STRING_TYPES) else raw_string