Network Working Group M. Stroeder
Internet-Draft January 7, 2013
Intended status: Informational
Expires: July 11, 2013
Lightweight Directory Access Protocol (LDAP):
Structural Object Classes for Named Objects
draft-stroeder-namedobject-01
Abstract
This document defines structural object classes that can be used when
no other structural object class seems suitable. Especially the
object classes will give the possibility to associate a common name
and a free-form description with the object.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Object Class Definitions . . . . . . . . . . . . . . . . . . . 3
2.1. 'namedObject' . . . . . . . . . . . . . . . . . . . . . . . 3
2.2. 'namedPolicy' . . . . . . . . . . . . . . . . . . . . . . . 4
3. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 4
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4
5. Security Considerations . . . . . . . . . . . . . . . . . . . . 4
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 5
6.1. Normative References . . . . . . . . . . . . . . . . . . . 5
6.2. Informative References . . . . . . . . . . . . . . . . . . 5
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 5
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1. Introduction
Standards for LDAP directories often define additional schema
elements, especially auxiliary object classes that are intended to
hold various attributes needed by that standard. When adding entries
with such an auxiliary object class it is up to the directory
operator to choose an appropriate structural object class required to
add the entry. Often the structural object classes used were defined
for other purposes and thus seem too complex for this simple purpose.
Inspired by unfinished [I-D.howard-namedobject] this document defines
structural object classes, 'namedObject' and 'namedPolicy'. Only
attributes defined in [RFC4519] and [RFC4524] are used within these
simple object classes. Arbitrary auxiliary object classes may be
thus associated with entries which have such a structural object
class.
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
This document is being discussed on the ldapext@ietf.org mailing
list.
2. Object Class Definitions
The object classes definitions in this section are using the
attributes 'cn' and 'description' defined in [RFC4519] and
'uniqueIdentifier' defined in [RFC4524].
If the optional attribute 'uniqueIdentifier' contains a value it
SHOULD be used to form the RDN of the entry. Otherwise the
mandantory attribute 'cn' SHOULD be used to form the RDN of the entry
if there are no other appropriate naming attributes available. Other
attributes allowed by auxiliary classes also MAY be used for naming
purposes.
LDAP clients displaying a list of entries of these object classes
SHOULD use mandantory attribute 'cn' to display select lists, hyper-
links etc.
2.1. 'namedObject'
The 'namedObject' object class definition is the basis of an entry
that represents an arbitrary named object. The attribute 'cn' MUST
be added to the entry. The attributes 'uniqueIdentifier' and
'description' MAY be added to the entry.
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( 1.3.6.1.4.1.5427.1.389.6.20
NAME 'namedObject'
SUP top
STRUCTURAL
MUST cn
MAY ( uniqueIdentifier $ description ) )
2.2. 'namedPolicy'
The 'namedPolicy' object class definition is sub-classed from
'namedObject'. It SHOULD only be used for entries which represents
an arbitrary policy. A typical example would be to use it along with
auxiliary object class 'pwdPolicy' defined in
[I-D.behera-ldap-password-policy].
The rationale for an extra structural object class is to have the
possibility to associate a specific set of policy-related auxiliary
object classes without having to restrict the more general
'namedObject' class.
( 1.3.6.1.4.1.5427.1.389.6.21
NAME 'namedPolicy'
SUP namedObject
STRUCTURAL )
3. Acknowledgements
The 'namedObject' object class definition in this document supersedes
the specification of the 'namedObject' in [I-D.howard-namedobject] by
L. Howard.
4. IANA Considerations
The OID arc used for the object class defintions is:
iso(1) org(3) dod(6) internet(1) private(4) enter-prise(1)
stroeder.com(5427) public(1) ldap(389) objectClasses(6)
5. Security Considerations
The introduction of these object classes does not impact the security
of the Internet or a particular LDAP directory service.
Security considerations for LDAP in general are discussed in
documents comprising the technical specification [RFC4510].
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6. References
6.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC4510] Zeilenga, K., "Lightweight Directory Access Protocol
(LDAP): Technical Specification Road Map", RFC 4510,
June 2006.
[RFC4519] Sciberras, A., "Lightweight Directory Access Protocol
(LDAP): Schema for User Applications", RFC 4519,
June 2006.
[RFC4524] Zeilenga, K., "COSINE LDAP/X.500 Schema", RFC 4524,
June 2006.
6.2. Informative References
[I-D.behera-ldap-password-policy]
Sermersheim, J., Poitou, L., and H. Chu, "Password Policy
for LDAP Directories",
draft-behera-ldap-password-policy-10 (work in progress),
August 2009.
[I-D.howard-namedobject]
Howard, L., "A Structural Object Class for Arbitrary
Auxiliary Object Classes", draft-howard-namedobject-00
(work in progress), June 2002.
Author's Address
Michael Stroeder
Karlsruhe
Germany
Email: michael@stroeder.com
URI: http://www.stroeder.com
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