INTERNET-DRAFT Kurt D. Zeilenga Intended Category: Standard Track Isode Limited Expires in six months 14 February 2007 The LDAP Don't Use Copy Control <draft-zeilenga-ldap-dontusecopy-04.txt> Status of this Memo This document is intended to be, after appropriate review and revision, submitted to the IESG for consideration as a Standard Track document. Distribution of this memo is unlimited. Technical discussion of this document will take place on the IETF LDAP Extensions mailing list <ldapext@ietf.org>. Please send editorial comments directly to the author <Kurt.Zeilenga@Isode.COM>. 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 LDAP Don't Use Copy Control [Page 1]  INTERNET-DRAFT draft-zeilenga-ldap-dontusecopy-04 14 February 2007 Abstract This document defines the Lightweight Directory Access Protocol (LDAP) Don't Use Copy control extension which allows a client to specify that copied information should not be used in providing service. This control is based upon the X.511 dontUseCopy service control option. 1. Background and Intended Usage This document defines the Lightweight Directory Access Protocol (LDAP) [RFC4510] Don't Use Copy control extension. The control may be attached to request messages to indicate that copied (replicated or cached) information [X.500] should not be used in providing service. This control is based upon the X.511 [X.511] dontUseCopy service control option. The Don't Use Copy control is intended to be used where the client requires the service be provided using original (master) information [X.500]. 2. Terminology DSA stands for Directory System Agent (or server). DSE stands for DSA-specific Entry. 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 BCP 14 [RFC2119]. 3. The Don't Use Copy Control The Don't Use Copy control is an LDAP Control [RFC4511] whose controlType is IANA-ASSIGNED-OID and controlValue is absent. The criticality MUST be TRUE. There is no corresponding response control. The control is appropriate for both LDAP interrogation operations, including Compare and Search operations [RFC4511]. It is inappropriate for all other operations, including Abandon, Bind, Delete, Modify, ModifyDN, StartTLS, and Unbind operations [RFC4511]. When the control is attached to an LDAP request, the requested operation MUST NOT be performed on copied information. That is, the requested operation MUST be performed on original information. If original information for the target or base object of the operation Zeilenga LDAP Don't Use Copy Control [Page 2]  INTERNET-DRAFT draft-zeilenga-ldap-dontusecopy-04 14 February 2007 is not available (either locally or through chaining), the server MUST either return a referral directing the client to a server believed to be better able to service the request or return an appropriate result code (e.g., unwillingToPerform). Servers implementing this technical specification SHOULD publish the object identifier IANA-ASSIGNED-OID as a value of the 'supportedControl' attribute [RFC4512] in their root DSE. A server MAY choose to advertise this extension only when the client is authorized to use it. 4. Security Considerations This control is intended to be provided where providing service using copied information might lead to unexpected application behavior. Designers of directory applications should consider where it is appropriate for clients to provide this control. Designers should consider whether use of copied information, in particular security and policy information, may result insecure behavior. Security considerations for the base operations [RFC4511] extended by this control, as well as general LDAP security considerations [RFC4510], generally apply to implementation and use of this extension. 5. IANA Considerations 5.1. Object Identifier It is requested that IANA assign upon Standards Action an LDAP Object Identifier [RFC4520] to identify the LDAP Don't Use Copy Control defined in this document. Subject: Request for LDAP Object Identifier Registration Person & email address to contact for further information: Kurt Zeilenga <Kurt.Zeilenga@Isode.COM> Specification: RFC XXXX Author/Change Controller: IESG Comments: Identifies the LDAP Don't Use Copy Control 5.2 LDAP Protocol Mechanism Registration of this protocol mechanism [RFC4520] is requested. Subject: Request for LDAP Protocol Mechanism Registration Zeilenga LDAP Don't Use Copy Control [Page 3]  INTERNET-DRAFT draft-zeilenga-ldap-dontusecopy-04 14 February 2007 Object Identifier: IANA-ASSIGNED-OID Description: Don't Use Copy Control Person & email address to contact for further information: Kurt Zeilenga <Kurt.Zeilenga@Isode.COM> Usage: Control Specification: RFC XXXX Author/Change Controller: IESG Comments: none 6. Author's Address Kurt D. Zeilenga Isode Limited Email: Kurt.Zeilenga@Isode.COM 7. References [[Note to the RFC Editor: please replace the citation tags used in referencing Internet-Drafts with tags of the form RFCnnnn where possible.]] 7.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14 (also RFC 2119), March 1997. [RFC4510] Zeilenga, K. (editor), "LDAP: Technical Specification Road Map", RFC 4510, June 2006. [RFC4511] Sermersheim, J. (editor), "LDAP: The Protocol", RFC 4511, June 2006. [RFC4512] Zeilenga, K. (editor), "LDAP: Directory Information Models", RFC 4512, June 2006. 7.2. Informative References [X.500] International Telecommunication Union - Telecommunication Standardization Sector, "The Directory -- Overview of concepts, models and services," X.500(1993) (also ISO/IEC 9594-1:1994). Zeilenga LDAP Don't Use Copy Control [Page 4]  INTERNET-DRAFT draft-zeilenga-ldap-dontusecopy-04 14 February 2007 [X.511] International Telecommunication Union - Telecommunication Standardization Sector, "The Directory: Abstract Service Definition", X.511(1993) (also ISO/IEC 9594-3:1993). [RFC4520] Zeilenga, K., "Internet Assigned Numbers Authority (IANA) Considerations for the Lightweight Directory Access Protocol (LDAP)", RFC 4520, BCP 64, June 2006. 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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 Zeilenga LDAP Don't Use Copy Control [Page 5]  INTERNET-DRAFT draft-zeilenga-ldap-dontusecopy-04 14 February 2007 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 LDAP Don't Use Copy Control [Page 6]