INTERNET-DRAFT Kurt D. Zeilenga Intended Category: Standard Track Isode Limited Expires in six months 25 April 2007 The LDAP entryDN Operational Attribute Status of this Memo This document is intended to be, after appropriate review and revision, submitted to the RFC Editor as an Standard Track document. Distribution of this memo is unlimited. Technical discussion of this document will take place on the IETF LDAP Extensions mailing list . Please send editorial comments directly to the author . By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/1id-abstracts.html. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. Copyright (C) The IETF Trust (2007). All Rights Reserved. Please see the Full Copyright section near the end of this document for more information. Zeilenga draft-zeilenga-ldap-entrydn-02 [Page 1] INTERNET-DRAFT LDAP entryDN 25 April 2007 Abstract This document describes the LDAP/X.500 'entryDN' operational attribute. The attribute provides a copy of the entry's distinguished name for use in attribute value assertions. 1. Background and Intended Use In X.500 Directory Services [X.501], such as those accessible using the Lightweight Directory Access Protocol (LDAP) [RFC4510], an entry is identified by its distinguished name (DN) [RFC4512]. However, as an entry's DN is not an attribute of the entry, it is not possible to perform attribute value assertions [RFC4511] against it. This document describes the 'entryDN' operational attribute which holds a copy of the entry's distinguished name. This attribute may be used in search filters. For instance, searching the subtree with the filter: (entryDN:componentFilterMatch:=or:{ item:{ component "3", rule rdnMatch, value "ou=A" }, item:{ component "3", rule rdnMatch, value "ou=B" } }) would return entries in the subtree and entries in subtree , but would not return any other entries in the subtree . In the above paragraph, DNs are presented using the string representation defined in [RFC4514] and the example search filter is presented using the string representation defined in [RFC4515] with whitespace (line breaks and indentation) added to improve readability. The 'componentFilterMatch' and 'rdnMatch' rules are specified in [RFC3687]. Schema definitions are provided using LDAP description formats [RFC4512]. Definitions provided here are formatted (line wrapped) for readability. 2. 'entryDN' Operational Attribute The 'entryDN' operational attribute provides a copy of the entry's current DN. The following is a LDAP attribute type description suitable for publication in subschema subentries. Zeilenga draft-zeilenga-ldap-entrydn-02 [Page 2] INTERNET-DRAFT LDAP entryDN 25 April 2007 ( IANA-ASSIGNED-OID NAME 'entryDN' DESC 'DN of the entry' EQUALITY distinguishedNameMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.12 SINGLE-VALUE NO-USER-MODIFICATION USAGE directoryOperation ) Note that the DN of the entry cannot be modified through this attribute. 3. Security Considerations As this attribute only provides an additional mechanism to access an entry's DN, the introduction of this attribute is not believed to introduce new security considerations. 4. IANA Considerations 4.1. Object Identifier Registration It is requested that IANA register (upon Standards Action) an LDAP Object Identifier [RFC4520] for use in this document. Subject: Request for LDAP OID Registration Person & email address to contact for further information: Kurt Zeilenga Specification: RFC XXXX Author/Change Controller: IESG Comments: Identifies the 'entryDN' attribute type [[Note to RFC Editor: The string IANA-ASSIGNED-OID, as it appears in this document, is to be replaced by Object Identifier assigned by IANA for use in document.]] 4.2. 'entryDN' Descriptor Registration It is requested that IANA register (upon Standards Action) the LDAP 'entryDN' descriptor [RFC4520]. Subject: Request for LDAP Descriptor Registration Descriptor (short name): entryDN Object Identifier: IANA-ASSIGNED-OID Zeilenga draft-zeilenga-ldap-entrydn-02 [Page 3] INTERNET-DRAFT LDAP entryDN 25 April 2007 Person & email address to contact for further information: Kurt Zeilenga Usage: Attribute Type Specification: RFC XXXX Author/Change Controller: IESG 5. Author's Address Kurt D. Zeilenga Isode Limited Email: Kurt.Zeilenga@Isode.COM 6. References 6.1. Normative References [RFC4510] Zeilenga, K. (editor), "LDAP: Technical Specification Road Map", RFC 4510, June 2006. [RFC4512] Zeilenga, K. (editor), "LDAP: Directory Information Models", RFC 4512, June 2006. [X.501] International Telecommunication Union - Telecommunication Standardization Sector, "The Directory -- Models," X.501(1993) (also ISO/IEC 9594-2:1994). 6.2. Informative References [RFC3687] Legg, S., "Lightweight Directory Access Protocol (LDAP) and X.500 Component Matching Rules", RFC 3687, February 2004. [RFC4511] Sermersheim, J. (editor), "LDAP: The Protocol", RFC 4511, June 2006. [RFC4514] Zeilenga, K. (editor), "LDAP: String Representation of Distinguished Names", RFC 4514, June 2006. [RFC4515] Smith, M. (editor), "LDAP: String Representation of Search Filters", RFC 4515, June 2006. [RFC4520] Zeilenga, K., "Internet Assigned Numbers Authority (IANA) Considerations for the Lightweight Directory Zeilenga draft-zeilenga-ldap-entrydn-02 [Page 4] INTERNET-DRAFT LDAP entryDN 25 April 2007 Access Protocol (LDAP)", RFC 4520, BCP 64, June 2006. Intellectual Property The IETF takes no position regarding the validity or scope of any Intellectual Property Rights or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; nor does it represent that it has made any independent effort to identify any such rights. Information on the procedures with respect to rights in RFC documents can be found in BCP 78 and BCP 79. 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This document and the information contained herein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Zeilenga draft-zeilenga-ldap-entrydn-02 [Page 5]