draft-zeilenga-ldap-dontusecopy-xx.txt [plain text]
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
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document. Distribution of this memo is unlimited. Technical
discussion of this document will take place on the IETF LDAP
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comments directly to the author <Kurt.Zeilenga@Isode.COM>.
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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
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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
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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).
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[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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