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Filename : rfc2251.py
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#
# This file is part of pyasn1-modules software.
#
# Copyright (c) 2005-2017, Ilya Etingof <etingof@gmail.com>
# License: http://pyasn1.sf.net/license.html
#
# LDAP message syntax
#
# ASN.1 source from:
# http://www.trl.ibm.com/projects/xml/xss4j/data/asn1/grammars/ldap.asn
#
# Sample captures from:
# http://wiki.wireshark.org/SampleCaptures/
#
from pyasn1.type import constraint
from pyasn1.type import namedtype
from pyasn1.type import namedval
from pyasn1.type import tag
from pyasn1.type import univ

maxInt = univ.Integer(2147483647)


class LDAPString(univ.OctetString):
    pass


class LDAPOID(univ.OctetString):
    pass


class LDAPDN(LDAPString):
    pass


class RelativeLDAPDN(LDAPString):
    pass


class AttributeType(LDAPString):
    pass


class AttributeDescription(LDAPString):
    pass


class AttributeDescriptionList(univ.SequenceOf):
    componentType = AttributeDescription()


class AttributeValue(univ.OctetString):
    pass


class AssertionValue(univ.OctetString):
    pass


class AttributeValueAssertion(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('attributeDesc', AttributeDescription()),
        namedtype.NamedType('assertionValue', AssertionValue())
    )


class Attribute(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('type', AttributeDescription()),
        namedtype.NamedType('vals', univ.SetOf(componentType=AttributeValue()))
    )


class MatchingRuleId(LDAPString):
    pass


class Control(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('controlType', LDAPOID()),
        namedtype.DefaultedNamedType('criticality', univ.Boolean('False')),
        namedtype.OptionalNamedType('controlValue', univ.OctetString())
    )


class Controls(univ.SequenceOf):
    componentType = Control()


class LDAPURL(LDAPString):
    pass


class Referral(univ.SequenceOf):
    componentType = LDAPURL()


class SaslCredentials(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('mechanism', LDAPString()),
        namedtype.OptionalNamedType('credentials', univ.OctetString())
    )


class AuthenticationChoice(univ.Choice):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('simple', univ.OctetString().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
        namedtype.NamedType('reserved-1', univ.OctetString().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
        namedtype.NamedType('reserved-2', univ.OctetString().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2))),
        namedtype.NamedType('sasl',
                            SaslCredentials().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 3)))
    )


class BindRequest(univ.Sequence):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 0)
    )
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('version', univ.Integer().subtype(subtypeSpec=constraint.ValueRangeConstraint(1, 127))),
        namedtype.NamedType('name', LDAPDN()),
        namedtype.NamedType('authentication', AuthenticationChoice())
    )


class PartialAttributeList(univ.SequenceOf):
    componentType = univ.Sequence(
        componentType=namedtype.NamedTypes(
            namedtype.NamedType('type', AttributeDescription()),
            namedtype.NamedType('vals', univ.SetOf(componentType=AttributeValue()))
        )
    )


class SearchResultEntry(univ.Sequence):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 4)
    )
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('objectName', LDAPDN()),
        namedtype.NamedType('attributes', PartialAttributeList())
    )


class MatchingRuleAssertion(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.OptionalNamedType('matchingRule', MatchingRuleId().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
        namedtype.OptionalNamedType('type', AttributeDescription().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2))),
        namedtype.NamedType('matchValue',
                            AssertionValue().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 3))),
        namedtype.DefaultedNamedType('dnAttributes', univ.Boolean('False').subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 4)))
    )


class SubstringFilter(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('type', AttributeDescription()),
        namedtype.NamedType('substrings',
            univ.SequenceOf(
                componentType=univ.Choice(
                    componentType=namedtype.NamedTypes(
                        namedtype.NamedType(
                            'initial', LDAPString().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))
                        ),
                        namedtype.NamedType(
                            'any', LDAPString().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))
                        ),
                        namedtype.NamedType(
                            'final', LDAPString().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2))
                        )
                    )
                )
            )
        )
    )


# Ugly hack to handle recursive Filter reference (up to 3-levels deep).

class Filter3(univ.Choice):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('equalityMatch', AttributeValueAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 3))),
        namedtype.NamedType('substrings', SubstringFilter().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 4))),
        namedtype.NamedType('greaterOrEqual', AttributeValueAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 5))),
        namedtype.NamedType('lessOrEqual', AttributeValueAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 6))),
        namedtype.NamedType('present', AttributeDescription().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 7))),
        namedtype.NamedType('approxMatch', AttributeValueAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 8))),
        namedtype.NamedType('extensibleMatch', MatchingRuleAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 9)))
    )


class Filter2(univ.Choice):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('and', univ.SetOf(componentType=Filter3()).subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0))),
        namedtype.NamedType('or', univ.SetOf(componentType=Filter3()).subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 1))),
        namedtype.NamedType('not',
                            Filter3().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 2))),
        namedtype.NamedType('equalityMatch', AttributeValueAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 3))),
        namedtype.NamedType('substrings', SubstringFilter().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 4))),
        namedtype.NamedType('greaterOrEqual', AttributeValueAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 5))),
        namedtype.NamedType('lessOrEqual', AttributeValueAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 6))),
        namedtype.NamedType('present', AttributeDescription().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 7))),
        namedtype.NamedType('approxMatch', AttributeValueAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 8))),
        namedtype.NamedType('extensibleMatch', MatchingRuleAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 9)))
    )


class Filter(univ.Choice):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('and', univ.SetOf(componentType=Filter2()).subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0))),
        namedtype.NamedType('or', univ.SetOf(componentType=Filter2()).subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 1))),
        namedtype.NamedType('not',
                            Filter2().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 2))),
        namedtype.NamedType('equalityMatch', AttributeValueAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 3))),
        namedtype.NamedType('substrings', SubstringFilter().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 4))),
        namedtype.NamedType('greaterOrEqual', AttributeValueAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 5))),
        namedtype.NamedType('lessOrEqual', AttributeValueAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 6))),
        namedtype.NamedType('present', AttributeDescription().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 7))),
        namedtype.NamedType('approxMatch', AttributeValueAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 8))),
        namedtype.NamedType('extensibleMatch', MatchingRuleAssertion().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 9)))
    )


# End of Filter hack

class SearchRequest(univ.Sequence):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 3)
    )
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('baseObject', LDAPDN()),
        namedtype.NamedType('scope', univ.Enumerated(
            namedValues=namedval.NamedValues(('baseObject', 0), ('singleLevel', 1), ('wholeSubtree', 2)))),
        namedtype.NamedType('derefAliases', univ.Enumerated(
            namedValues=namedval.NamedValues(('neverDerefAliases', 0), ('derefInSearching', 1),
                                             ('derefFindingBaseObj', 2), ('derefAlways', 3)))),
        namedtype.NamedType('sizeLimit',
                            univ.Integer().subtype(subtypeSpec=constraint.ValueRangeConstraint(0, maxInt))),
        namedtype.NamedType('timeLimit',
                            univ.Integer().subtype(subtypeSpec=constraint.ValueRangeConstraint(0, maxInt))),
        namedtype.NamedType('typesOnly', univ.Boolean()),
        namedtype.NamedType('filter', Filter()),
        namedtype.NamedType('attributes', AttributeDescriptionList())
    )


class UnbindRequest(univ.Null):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 2)
    )


class BindResponse(univ.Sequence):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 1)
    )
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('resultCode', univ.Enumerated(
            namedValues=namedval.NamedValues(('success', 0), ('operationsError', 1), ('protocolError', 2),
                                             ('timeLimitExceeded', 3), ('sizeLimitExceeded', 4), ('compareFalse', 5),
                                             ('compareTrue', 6), ('authMethodNotSupported', 7),
                                             ('strongAuthRequired', 8), ('reserved-9', 9), ('referral', 10),
                                             ('adminLimitExceeded', 11), ('unavailableCriticalExtension', 12),
                                             ('confidentialityRequired', 13), ('saslBindInProgress', 14),
                                             ('noSuchAttribute', 16), ('undefinedAttributeType', 17),
                                             ('inappropriateMatching', 18), ('constraintViolation', 19),
                                             ('attributeOrValueExists', 20), ('invalidAttributeSyntax', 21),
                                             ('noSuchObject', 32), ('aliasProblem', 33), ('invalidDNSyntax', 34),
                                             ('reserved-35', 35), ('aliasDereferencingProblem', 36),
                                             ('inappropriateAuthentication', 48), ('invalidCredentials', 49),
                                             ('insufficientAccessRights', 50), ('busy', 51), ('unavailable', 52),
                                             ('unwillingToPerform', 53), ('loopDetect', 54), ('namingViolation', 64),
                                             ('objectClassViolation', 65), ('notAllowedOnNonLeaf', 66),
                                             ('notAllowedOnRDN', 67), ('entryAlreadyExists', 68),
                                             ('objectClassModsProhibited', 69), ('reserved-70', 70),
                                             ('affectsMultipleDSAs', 71), ('other', 80), ('reserved-81', 81),
                                             ('reserved-82', 82), ('reserved-83', 83), ('reserved-84', 84),
                                             ('reserved-85', 85), ('reserved-86', 86), ('reserved-87', 87),
                                             ('reserved-88', 88), ('reserved-89', 89), ('reserved-90', 90)))),
        namedtype.NamedType('matchedDN', LDAPDN()),
        namedtype.NamedType('errorMessage', LDAPString()),
        namedtype.OptionalNamedType('referral', Referral().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 3))),
        namedtype.OptionalNamedType('serverSaslCreds', univ.OctetString().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 7)))
    )


class LDAPResult(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('resultCode', univ.Enumerated(
            namedValues=namedval.NamedValues(('success', 0), ('operationsError', 1), ('protocolError', 2),
                                             ('timeLimitExceeded', 3), ('sizeLimitExceeded', 4), ('compareFalse', 5),
                                             ('compareTrue', 6), ('authMethodNotSupported', 7),
                                             ('strongAuthRequired', 8), ('reserved-9', 9), ('referral', 10),
                                             ('adminLimitExceeded', 11), ('unavailableCriticalExtension', 12),
                                             ('confidentialityRequired', 13), ('saslBindInProgress', 14),
                                             ('noSuchAttribute', 16), ('undefinedAttributeType', 17),
                                             ('inappropriateMatching', 18), ('constraintViolation', 19),
                                             ('attributeOrValueExists', 20), ('invalidAttributeSyntax', 21),
                                             ('noSuchObject', 32), ('aliasProblem', 33), ('invalidDNSyntax', 34),
                                             ('reserved-35', 35), ('aliasDereferencingProblem', 36),
                                             ('inappropriateAuthentication', 48), ('invalidCredentials', 49),
                                             ('insufficientAccessRights', 50), ('busy', 51), ('unavailable', 52),
                                             ('unwillingToPerform', 53), ('loopDetect', 54), ('namingViolation', 64),
                                             ('objectClassViolation', 65), ('notAllowedOnNonLeaf', 66),
                                             ('notAllowedOnRDN', 67), ('entryAlreadyExists', 68),
                                             ('objectClassModsProhibited', 69), ('reserved-70', 70),
                                             ('affectsMultipleDSAs', 71), ('other', 80), ('reserved-81', 81),
                                             ('reserved-82', 82), ('reserved-83', 83), ('reserved-84', 84),
                                             ('reserved-85', 85), ('reserved-86', 86), ('reserved-87', 87),
                                             ('reserved-88', 88), ('reserved-89', 89), ('reserved-90', 90)))),
        namedtype.NamedType('matchedDN', LDAPDN()),
        namedtype.NamedType('errorMessage', LDAPString()),
        namedtype.OptionalNamedType('referral', Referral().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 3)))
    )


class SearchResultReference(univ.SequenceOf):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 19)
    )
    componentType = LDAPURL()


class SearchResultDone(LDAPResult):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 5)
    )


class AttributeTypeAndValues(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('type', AttributeDescription()),
        namedtype.NamedType('vals', univ.SetOf(componentType=AttributeValue()))
    )


class ModifyRequest(univ.Sequence):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 6)
    )
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('object', LDAPDN()),
        namedtype.NamedType('modification',
            univ.SequenceOf(
                componentType=univ.Sequence(
                    componentType=namedtype.NamedTypes(
                        namedtype.NamedType(
                            'operation', univ.Enumerated(namedValues=namedval.NamedValues(('add', 0), ('delete', 1), ('replace', 2)))
                        ),
                        namedtype.NamedType('modification', AttributeTypeAndValues())))
            )
        )
    )


class ModifyResponse(LDAPResult):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 7)
    )


class AttributeList(univ.SequenceOf):
    componentType = univ.Sequence(
        componentType=namedtype.NamedTypes(
           namedtype.NamedType('type', AttributeDescription()),
           namedtype.NamedType('vals', univ.SetOf(componentType=AttributeValue()))
        )
    )


class AddRequest(univ.Sequence):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 8)
    )
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('entry', LDAPDN()),
        namedtype.NamedType('attributes', AttributeList())
    )


class AddResponse(LDAPResult):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 9)
    )


class DelRequest(LDAPResult):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 10)
    )


class DelResponse(LDAPResult):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 11)
    )


class ModifyDNRequest(univ.Sequence):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 12)
    )
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('entry', LDAPDN()),
        namedtype.NamedType('newrdn', RelativeLDAPDN()),
        namedtype.NamedType('deleteoldrdn', univ.Boolean()),
        namedtype.OptionalNamedType('newSuperior',
                                    LDAPDN().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0)))

    )


class ModifyDNResponse(LDAPResult):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 13)
    )


class CompareRequest(univ.Sequence):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 14)
    )
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('entry', LDAPDN()),
        namedtype.NamedType('ava', AttributeValueAssertion())
    )


class CompareResponse(LDAPResult):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 15)
    )


class AbandonRequest(LDAPResult):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 16)
    )


class ExtendedRequest(univ.Sequence):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 23)
    )
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('requestName',
                            LDAPOID().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
        namedtype.OptionalNamedType('requestValue', univ.OctetString().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1)))
    )


class ExtendedResponse(univ.Sequence):
    tagSet = univ.Sequence.tagSet.tagImplicitly(
        tag.Tag(tag.tagClassApplication, tag.tagFormatConstructed, 24)
    )
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('resultCode', univ.Enumerated(
            namedValues=namedval.NamedValues(('success', 0), ('operationsError', 1), ('protocolError', 2),
                                             ('timeLimitExceeded', 3), ('sizeLimitExceeded', 4), ('compareFalse', 5),
                                             ('compareTrue', 6), ('authMethodNotSupported', 7),
                                             ('strongAuthRequired', 8), ('reserved-9', 9), ('referral', 10),
                                             ('adminLimitExceeded', 11), ('unavailableCriticalExtension', 12),
                                             ('confidentialityRequired', 13), ('saslBindInProgress', 14),
                                             ('noSuchAttribute', 16), ('undefinedAttributeType', 17),
                                             ('inappropriateMatching', 18), ('constraintViolation', 19),
                                             ('attributeOrValueExists', 20), ('invalidAttributeSyntax', 21),
                                             ('noSuchObject', 32), ('aliasProblem', 33), ('invalidDNSyntax', 34),
                                             ('reserved-35', 35), ('aliasDereferencingProblem', 36),
                                             ('inappropriateAuthentication', 48), ('invalidCredentials', 49),
                                             ('insufficientAccessRights', 50), ('busy', 51), ('unavailable', 52),
                                             ('unwillingToPerform', 53), ('loopDetect', 54), ('namingViolation', 64),
                                             ('objectClassViolation', 65), ('notAllowedOnNonLeaf', 66),
                                             ('notAllowedOnRDN', 67), ('entryAlreadyExists', 68),
                                             ('objectClassModsProhibited', 69), ('reserved-70', 70),
                                             ('affectsMultipleDSAs', 71), ('other', 80), ('reserved-81', 81),
                                             ('reserved-82', 82), ('reserved-83', 83), ('reserved-84', 84),
                                             ('reserved-85', 85), ('reserved-86', 86), ('reserved-87', 87),
                                             ('reserved-88', 88), ('reserved-89', 89), ('reserved-90', 90)))),
        namedtype.NamedType('matchedDN', LDAPDN()),
        namedtype.NamedType('errorMessage', LDAPString()),
        namedtype.OptionalNamedType('referral', Referral().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 3))),

        namedtype.OptionalNamedType('responseName', LDAPOID().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 10))),
        namedtype.OptionalNamedType('response', univ.OctetString().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 11)))
    )


class MessageID(univ.Integer):
    subtypeSpec = univ.Integer.subtypeSpec + constraint.ValueRangeConstraint(
        0, maxInt
    )


class LDAPMessage(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('messageID', MessageID()),
        namedtype.NamedType(
            'protocolOp', univ.Choice(
                componentType=namedtype.NamedTypes(
                    namedtype.NamedType('bindRequest', BindRequest()),
                    namedtype.NamedType('bindResponse', BindResponse()),
                    namedtype.NamedType('unbindRequest', UnbindRequest()),
                    namedtype.NamedType('searchRequest', SearchRequest()),
                    namedtype.NamedType('searchResEntry', SearchResultEntry()),
                    namedtype.NamedType('searchResDone', SearchResultDone()),
                    namedtype.NamedType('searchResRef', SearchResultReference()),
                    namedtype.NamedType('modifyRequest', ModifyRequest()),
                    namedtype.NamedType('modifyResponse', ModifyResponse()),
                    namedtype.NamedType('addRequest', AddRequest()),
                    namedtype.NamedType('addResponse', AddResponse()),
                    namedtype.NamedType('delRequest', DelRequest()),
                    namedtype.NamedType('delResponse', DelResponse()),
                    namedtype.NamedType('modDNRequest', ModifyDNRequest()),
                    namedtype.NamedType('modDNResponse', ModifyDNResponse()),
                    namedtype.NamedType('compareRequest', CompareRequest()),
                    namedtype.NamedType('compareResponse', CompareResponse()),
                    namedtype.NamedType('abandonRequest', AbandonRequest()),
                    namedtype.NamedType('extendedReq', ExtendedRequest()),
                    namedtype.NamedType('extendedResp', ExtendedResponse())
                )
            )
        ),
        namedtype.OptionalNamedType('controls', Controls().subtype(
            implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0)))
    )