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+NETWORK WORKING GROUP                                        N. Williams
+Internet-Draft                                                       Sun
+Expires: April 19, 2006                                 October 16, 2005
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+            GSS-API Domain-Based Service Names and Name Type
+           draft-ietf-kitten-gssapi-domain-based-names-01.txt
+
+Status of this Memo
+
+   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/ietf/1id-abstracts.txt.
+
+   The list of Internet-Draft Shadow Directories can be accessed at
+   http://www.ietf.org/shadow.html.
+
+   This Internet-Draft will expire on April 19, 2006.
+
+Copyright Notice
+
+   Copyright (C) The Internet Society (2005).
+
+Abstract
+
+   This document describes domainname-based service principal names and
+   the corresponding name type for the Generic Security Service
+   Application Programming Interface (GSS-API).
+
+   Domain-based service names are similar to host-based service names,
+   but using a domain name (not necessarily and Internat domain name)
+   instead of or in addition to a hostname.  The primary purpose of
+   domain-based service names is to provide a way to name clustered
+   services after the domain which they service, thereby allowing their
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+Williams                 Expires April 19, 2006                 [Page 1]
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+Internet-Draft           GSS Domain Based Names             October 2005
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+   clients to authorize the service's servers based on authentication of
+   their names.
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+Table of Contents
+
+   1.    Conventions used in this document  . . . . . . . . . . . . .  3
+   2.    Introduction . . . . . . . . . . . . . . . . . . . . . . . .  4
+   3.    Name Type OID and Symbolic Name  . . . . . . . . . . . . . .  5
+   4.    Query and Display Syntaxes . . . . . . . . . . . . . . . . .  6
+   5.    Examples . . . . . . . . . . . . . . . . . . . . . . . . . .  7
+   6.    Security Considerations  . . . . . . . . . . . . . . . . . .  8
+   7.    References . . . . . . . . . . . . . . . . . . . . . . . . .  9
+   7.1.  Normative  . . . . . . . . . . . . . . . . . . . . . . . . .  9
+   7.2.  Informative  . . . . . . . . . . . . . . . . . . . . . . . .  9
+         Author's Address . . . . . . . . . . . . . . . . . . . . . . 10
+         Intellectual Property and Copyright Statements . . . . . . . 11
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+Williams                 Expires April 19, 2006                 [Page 2]
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+1.  Conventions used in this document
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+   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].
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+2.  Introduction
+
+   The use of hostbased principal names for domain-wide services
+   presents the problem of how to distinguish between an instance of a
+   hostbased service that is authorized to respond for a domain and one
+   that isn't.
+
+   Consider LDAP.  LDAP [RFC3377] with SASL [RFC2222] and the Kerberos V
+   mechanism [RFC1964] for the GSS-API [RFC2743] uses a hostbased
+   principal with a service name of "ldap", a reasonable approach,
+   provided there is only one logical LDAP directory in a Kerberos
+   realm's domain, and that all ldap servers in that realm serve that
+   one LDAP directory.  If there were other LDAP directories, then
+   clients could not tell which service is authorized to serve which
+   directory, not without assuming a secure method for finding LDAP
+   servers (e.g., DNSSEC).  This is a significant, and oft-unstated
+   restriction on users of LDAP.
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+   Domain based names can eliminate this problem by allowing LDAP
+   service names to indicate which LDAP directory they are authorized to
+   serve.
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+   A domain-based name consists of three required elements:
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+   o  a service name
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+   o  a domain name
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+   o  a hostname
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+3.  Name Type OID and Symbolic Name
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+   The new name type has an OID of
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+      [NOTE: OID assignment to be made with IANA.]
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+      {iso(1) org(3) dod(6) internet(1) security(5) nametypes(6) gss-
+      domain-based(5)}
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+   The recommended symbolic name for this GSS-API name type is
+   "GSS_C_NT_DOMAINBASED_SERVICE".
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+4.  Query and Display Syntaxes
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+   There is a single name syntax for domain-based names.
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+   The syntax is:
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+      domain-based-name :=
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+         | <service> '@' <domain> '@' <hostname>
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+   Note that for Internet domain names the trailing '.' is not and MUST
+   NOT be included in the domain name (or hostname) parts of the display
+   form GSS-API domain-based MNs.
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+5.  Examples
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+   o  ldap@example.tld@ds1.example.tld
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+   o  kadmin@example.tld@kdc1.example.tld
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+Williams                 Expires April 19, 2006                 [Page 7]
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+6.  Security Considerations
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+   Use of GSS-API domain-based names may not be negotiable by some GSS-
+   API mechanisms, and some acceptors may not support GSS-API domain-
+   based names.  In such cases initiators are left to fallback on the
+   use of hostbased names, in which case the initiators MUST also verify
+   that the acceptor's hostbased name is authorized to provide the given
+   service for the domain that the initiator had wanted.
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+   The above security consideration also applies to all GSS-API
+   initiators who lack support for domain-based service names.
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+Williams                 Expires April 19, 2006                 [Page 8]
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+7.  References
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+7.1.  Normative
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+   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
+              Requirement Levels", BCP 14, RFC 2119, March 1997.
+
+   [RFC2743]  Linn, J., "Generic Security Service Application Program
+              Interface Version 2, Update 1", RFC 2743, January 2000.
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+7.2.  Informative
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+   [RFC1964]  Linn, J., "The Kerberos Version 5 GSS-API Mechanism",
+              RFC 1964, June 1996.
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+   [RFC2222]  Myers, J., "Simple Authentication and Security Layer
+              (SASL)", RFC 2222, October 1997.
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+   [RFC3377]  Hodges, J. and R. Morgan, "Lightweight Directory Access
+              Protocol (v3): Technical Specification", RFC 3377,
+              September 2002.
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+Williams                 Expires April 19, 2006                 [Page 9]
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+Author's Address
+
+   Nicolas Williams
+   Sun Microsystems
+   5300 Riata Trace Ct
+   Austin, TX  78727
+   US
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+   Email: Nicolas.Williams@sun.com
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+Williams                 Expires April 19, 2006                [Page 10]
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+Intellectual Property Statement
+
+   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.
+
+   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
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+   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.
+
+
+Disclaimer of Validity
+
+   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 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.
+
+
+Copyright Statement
+
+   Copyright (C) The Internet Society (2005).  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.
+
+
+Acknowledgment
+
+   Funding for the RFC Editor function is currently provided by the
+   Internet Society.
+
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