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# -*- coding: utf-8 -*-
"""
ldap.controls.deref - classes for
(see https://tools.ietf.org/html/draft-masarati-ldap-deref)
See http://www.python-ldap.org/ for project details.
$Id: deref.py,v 1.2 2015/09/19 13:41:01 stroeder Exp $
"""
__all__ = [
'DEREF_CONTROL_OID',
'DereferenceControl',
]
import ldap.controls
from ldap.controls import LDAPControl,KNOWN_RESPONSE_CONTROLS
import pyasn1_modules.rfc2251
from pyasn1.type import namedtype,univ,tag
from pyasn1.codec.ber import encoder,decoder
from pyasn1_modules.rfc2251 import LDAPDN,AttributeDescription,AttributeDescriptionList,AttributeValue
DEREF_CONTROL_OID = '1.3.6.1.4.1.4203.666.5.16'
# Request types
#---------------------------------------------------------------------------
# For compability with ASN.1 declaration in I-D
AttributeList = AttributeDescriptionList
class DerefSpec(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType(
'derefAttr',
AttributeDescription()
),
namedtype.NamedType(
'attributes',
AttributeList()
),
)
class DerefSpecs(univ.SequenceOf):
componentType = DerefSpec()
# Response types
#---------------------------------------------------------------------------
class AttributeValues(univ.SetOf):
componentType = AttributeValue()
class PartialAttribute(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType('type', AttributeDescription()),
namedtype.NamedType('vals', AttributeValues()),
)
class PartialAttributeList(univ.SequenceOf):
componentType = PartialAttribute()
tagSet = univ.Sequence.tagSet.tagImplicitly(
tag.Tag(tag.tagClassContext,tag.tagFormatConstructed,0)
)
class DerefRes(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType('derefAttr', AttributeDescription()),
namedtype.NamedType('derefVal', LDAPDN()),
namedtype.OptionalNamedType('attrVals', PartialAttributeList()),
)
class DerefResultControlValue(univ.SequenceOf):
componentType = DerefRes()
class DereferenceControl(LDAPControl):
controlType = DEREF_CONTROL_OID
def __init__(self,criticality=False,derefSpecs=None):
LDAPControl.__init__(self,self.controlType,criticality)
self.derefSpecs = derefSpecs or {}
def _derefSpecs(self):
deref_specs = DerefSpecs()
i = 0
for deref_attr,deref_attribute_names in self.derefSpecs.items():
deref_spec = DerefSpec()
deref_attributes = AttributeList()
for j in range(len(deref_attribute_names)):
deref_attributes.setComponentByPosition(j,deref_attribute_names[j])
deref_spec.setComponentByName('derefAttr',AttributeDescription(deref_attr))
deref_spec.setComponentByName('attributes',deref_attributes)
deref_specs.setComponentByPosition(i,deref_spec)
i += 1
return deref_specs
def encodeControlValue(self):
return encoder.encode(self._derefSpecs())
def decodeControlValue(self,encodedControlValue):
decodedValue,_ = decoder.decode(encodedControlValue,asn1Spec=DerefResultControlValue())
self.derefRes = {}
for deref_res in decodedValue:
deref_attr,deref_val,deref_vals = deref_res
partial_attrs_dict = dict([
(str(t),map(str,v))
for t,v in deref_vals or []
])
try:
self.derefRes[str(deref_attr)].append((str(deref_val),partial_attrs_dict))
except KeyError:
self.derefRes[str(deref_attr)] = [(str(deref_val),partial_attrs_dict)]
KNOWN_RESPONSE_CONTROLS[DereferenceControl.controlType] = DereferenceControl