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Edit File : draft-zeilenga-ldap-noop-xx.txt \| Size : 11.44 KB
INTERNET-DRAFT Kurt D. Zeilenga Intended Category: Standard Track Isode Limited Expires in six months 14 February 2007 The LDAP No-Op Control <draft-zeilenga-ldap-noop-10.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 No-Op Control [Page 1] INTERNET-DRAFT draft-zeilenga-ldap-noop-10 14 February 2007 Abstract This document defines the Lightweight Directory Access Protocol (LDAP) No-Op control which can be used to disable the normal effect of an operation. The control can be used to discover how a server might react to a particular update request without updating the directory. 1. Overview It is often desirable to be able to determine if a directory operation [RFC4511] would successful complete or not without having the normal effect of the operation take place. For example, an administrative client might want to verify that new user could update their entry (and not other entries) without the directory actually being updated. The mechanism could be used to build more sophisticated security auditing tools. This document defines the Lightweight Directory Access Protocol (LDAP) [RFC4510] No-Op control extension. The presence of the No-Op control in an operation request message disables its normal effect upon the directory which operation would otherwise have. Instead of updating the directory and returning the normal indication of success, the server does not update the directory and indicates so by returning the noOperation resultCode (introduced below). For example, when the No-Op control is present in a LDAP modify operation [RFC4511], the server is do all processing necessary to perform the operation without actually updating the directory. If it detects an error during this processing, it returns a non-success (other than noOperation) resultCode as it normally would. Otherwise, it returns the noOperation. In either case, the directory is left unchanged. This No-Op control is not intended to be to an "effective access" mechanism [RFC2820, U12]. 1.1. Terminology 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]. DN stands for Distinguished Name. DSA stands for Directory System Agent. DSE stands for DSA-specific entry. Zeilenga LDAP No-Op Control [Page 2] INTERNET-DRAFT draft-zeilenga-ldap-noop-10 14 February 2007 2. No-Op Control The No-Op control is an LDAP Control [RFC4511] whose controlType is IANA-ASSIGNED-OID and controlValue is absent. Clients MUST provide a criticality value of TRUE to prevent unintended modification of the directory. The control is appropriate for request messages of LDAP Add, Delete, Modify and ModifyDN operations [RFC4511]. The control is also appropriate for requests of extended operations which update the directory (or other data stores), such as Password Modify Extended Operation [RFC3062]. There is no corresponding response control. When the control is attached to an LDAP request, the server does all normal processing possible for the operation without modification of the directory. That is, when the control is attached to an LDAP request, the directory SHALL NOT be updated and the response SHALL NOT have a resultCode of success (0). A result code other than noOperation (IANA-ASSIGNED-CODE) means that the server is unable or unwilling to complete the processing for the reason indicated by the result code. A result code of noOperation (IANA-ASSIGNED-CODE) indicates that the server discovered no reason why the operation would fail if submitted without the No-Op control. It is noted that there may be reasons why the operation may fail which are only discoverable when submitting without the No-Op control. Servers SHOULD indicate their support for this control by providing IANA-ASSIGNED-OID as a value of the 'supportedControl' attribute type [RFC4512] in their root DSE entry. A server MAY choose to advertise this extension only when the client is authorized to use this operation. 3. Security Considerations The No-Op control mechanism allows directory administrators and users to verify that access control and other administrative policy controls are properly configured. The mechanism may also lead to the development (and deployment) of more effective security auditing tools. Implementors of this LDAP extension should be familiar with security considerations applicable to the LDAP operations [RFC4511] extended by this control, as well as general LDAP security considerations [Roadmap]. Zeilenga LDAP No-Op Control [Page 3] INTERNET-DRAFT draft-zeilenga-ldap-noop-10 14 February 2007 4. IANA Considerations 4.1. Object Identifier It is requested that IANA assign an LDAP Object Identifier [RFC4520] to identify the LDAP No-Op 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 No-Op Control 4.2 LDAP Protocol Mechanism Registration of this protocol mechanism is requested [RFC4520]. Subject: Request for LDAP Protocol Mechanism Registration Object Identifier: IANA-ASSIGNED-OID Description: No-Op 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 4.3 LDAP Result Code Assignment of an LDAP Result Code called 'noOperation' is requested. Subject: LDAP Result Code Registration Person & email address to contact for further information: Kurt Zeilenga <Kurt.Zeilenga@Isode.COM> Result Code Name: noOperation Specification: RFC XXXX Author/Change Controller: IESG Comments: none 5. Author's Address Kurt D. Zeilenga Isode Limited Zeilenga LDAP No-Op Control [Page 4] INTERNET-DRAFT draft-zeilenga-ldap-noop-10 14 February 2007 Email: Kurt.Zeilenga@Isode.COM 6. References [[Note to the RFC Editor: please replace the citation tags used in referencing Internet-Drafts with tags of the form RFCnnnn where possible.]] 6.1. 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. 6.2. 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). [RFC2820] Stokes, E., et. al., "Access Control Requirements for LDAP", RFC 2820, May 2000. [RFC3062] Zeilenga, K., "LDAP Password Modify Extended Operation", RFC 3062, February 2000. [RFC4520] Zeilenga, K., "Internet Assigned Numbers Authority (IANA) Considerations for the Lightweight Directory 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 Zeilenga LDAP No-Op Control [Page 5] INTERNET-DRAFT draft-zeilenga-ldap-noop-10 14 February 2007 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. Copies of IPR disclosures made to the IETF Secretariat and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementers or users of this specification can be obtained from the IETF on-line IPR repository at http://www.ietf.org/ipr. The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights that may cover technology that may be required to implement this standard. Please address the information to the IETF at ietf-ipr@ietf.org. Full Copyright Copyright (C) The IETF Trust (2007). This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights. 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 LDAP No-Op Control [Page 6] Back

Edit File : draft-zeilenga-ldap-noop-xx.txt | Size : 11.44 KB

INTERNET-DRAFT                                      Kurt D. Zeilenga
Intended Category: Standard Track                      Isode Limited
Expires in six months                               14 February 2007

The LDAP No-Op Control
                    <draft-zeilenga-ldap-noop-10.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.

Please see the Full Copyright section near the end of this document
  for more information.

Zeilenga                   LDAP No-Op Control                   [Page 1]

INTERNET-DRAFT         draft-zeilenga-ldap-noop-10      14 February 2007

Abstract

This document defines the Lightweight Directory Access Protocol (LDAP)
  No-Op control which can be used to disable the normal effect of an
  operation.  The control can be used to discover how a server might
  react to a particular update request without updating the directory.

1.  Overview

It is often desirable to be able to determine if a directory operation
  [RFC4511] would successful complete or not without having the normal
  effect of the operation take place.  For example, an administrative
  client might want to verify that new user could update their entry
  (and not other entries) without the directory actually being updated.
  The mechanism could be used to build more sophisticated security
  auditing tools.

This document defines the Lightweight Directory Access Protocol (LDAP)
  [RFC4510] No-Op control extension.  The presence of the No-Op control
  in an operation request message disables its normal effect upon the
  directory which operation would otherwise have.  Instead of updating
  the directory and returning the normal indication of success, the
  server does not update the directory and indicates so by returning the
  noOperation resultCode (introduced below).

For example, when the No-Op control is present in a LDAP modify
  operation [RFC4511], the server is do all processing necessary to
  perform the operation without actually updating the directory.  If it
  detects an error during this processing, it returns a non-success
  (other than noOperation) resultCode as it normally would.  Otherwise,
  it returns the noOperation.  In either case, the directory is left
  unchanged.

This No-Op control is not intended to be to an "effective access"
  mechanism [RFC2820, U12].

1.1.  Terminology

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].

DN stands for Distinguished Name.
  DSA stands for Directory System Agent.
  DSE stands for DSA-specific entry.

Zeilenga                   LDAP No-Op Control                   [Page 2]

INTERNET-DRAFT         draft-zeilenga-ldap-noop-10      14 February 2007

2.  No-Op Control

The No-Op control is an LDAP Control [RFC4511] whose controlType is
  IANA-ASSIGNED-OID and controlValue is absent.  Clients MUST provide a
  criticality value of TRUE to prevent unintended modification of the
  directory.

The control is appropriate for request messages of LDAP Add, Delete,
  Modify and ModifyDN operations [RFC4511].  The control is also
  appropriate for requests of extended operations which update the
  directory (or other data stores), such as Password Modify Extended
  Operation [RFC3062].  There is no corresponding response control.

When the control is attached to an LDAP request, the server does all
  normal processing possible for the operation without modification of
  the directory.  That is, when the control is attached to an LDAP
  request, the directory SHALL NOT be updated and the response SHALL NOT
  have a resultCode of success (0).

A result code other than noOperation (IANA-ASSIGNED-CODE) means that
  the server is unable or unwilling to complete the processing for the
  reason indicated by the result code.  A result code of noOperation
  (IANA-ASSIGNED-CODE) indicates that the server discovered no reason
  why the operation would fail if submitted without the No-Op control.
  It is noted that there may be reasons why the operation may fail which
  are only discoverable when submitting without the No-Op control.

Servers SHOULD indicate their support for this control by providing
  IANA-ASSIGNED-OID as a value of the 'supportedControl' attribute type
  [RFC4512] in their root DSE entry.  A server MAY choose to advertise
  this extension only when the client is authorized to use this
  operation.

3.  Security Considerations

The No-Op control mechanism allows directory administrators and users
  to verify that access control and other administrative policy controls
  are properly configured.  The mechanism may also lead to the
  development (and deployment) of more effective security auditing
  tools.

Implementors of this LDAP extension should be familiar with security
  considerations applicable to the LDAP operations [RFC4511] extended by
  this control, as well as general LDAP security considerations
  [Roadmap].

Zeilenga                   LDAP No-Op Control                   [Page 3]

INTERNET-DRAFT         draft-zeilenga-ldap-noop-10      14 February 2007

4.  IANA Considerations

4.1.  Object Identifier

It is requested that IANA assign an LDAP Object Identifier [RFC4520]
  to identify the LDAP No-Op 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 No-Op Control

4.2  LDAP Protocol Mechanism

Registration of this protocol mechanism is requested [RFC4520].

Subject: Request for LDAP Protocol Mechanism Registration
  Object Identifier: IANA-ASSIGNED-OID
  Description: No-Op 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

4.3  LDAP Result Code

Assignment of an LDAP Result Code called 'noOperation' is requested.

Subject: LDAP Result Code Registration
      Person & email address to contact for further information:
          Kurt Zeilenga <Kurt.Zeilenga@Isode.COM>
      Result Code Name: noOperation
      Specification: RFC XXXX
      Author/Change Controller: IESG
      Comments:  none

5.  Author's Address

Kurt D. Zeilenga
  Isode Limited

Zeilenga                   LDAP No-Op Control                   [Page 4]

INTERNET-DRAFT         draft-zeilenga-ldap-noop-10      14 February 2007

Email: Kurt.Zeilenga@Isode.COM

6. References

[[Note to the RFC Editor: please replace the citation tags used in
  referencing Internet-Drafts with tags of the form RFCnnnn where
  possible.]]

6.1. 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.

6.2. 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).

[RFC2820]     Stokes, E., et. al., "Access Control Requirements for
                LDAP", RFC 2820, May 2000.

[RFC3062]     Zeilenga, K., "LDAP Password Modify Extended Operation",
                RFC 3062, February 2000.

[RFC4520]     Zeilenga, K., "Internet Assigned Numbers Authority
                (IANA) Considerations for the Lightweight Directory
                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

Zeilenga                   LDAP No-Op Control                   [Page 5]

INTERNET-DRAFT         draft-zeilenga-ldap-noop-10      14 February 2007

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.

Copies of IPR disclosures made to the IETF Secretariat and any
  assurances of licenses to be made available, or the result of an
  attempt made to obtain a general license or permission for the use of
  such proprietary rights by implementers or users of this specification
  can be obtained from the IETF on-line IPR repository at
  http://www.ietf.org/ipr.

The IETF invites any interested party to bring to its attention any
  copyrights, patents or patent applications, or other proprietary
  rights that may cover technology that may be required to implement
  this standard.  Please address the information to the IETF at
  ietf-ipr@ietf.org.

Full Copyright

This document is subject to the rights, licenses and restrictions
  contained in BCP 78, and except as set forth therein, the authors
  retain all their rights.

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                   LDAP No-Op Control                   [Page 6]

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