CVS gss/doc/specification

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Update of /home/cvs/gss/doc/specification
In directory dopio:/tmp/cvs-serv6927

Added Files:
        draft-williams-gssapi-domain-based-names-00.txt 
        draft-williams-gssapi-prf-00.txt 
        draft-williams-gssapi-v3-guide-to-00.txt 
        draft-williams-krb5-gssapi-domain-based-names-00.txt 
        draft-williams-krb5-gssapi-prf-00.txt 
        draft-zhu-spnego-2478bis-00.txt 
Log Message:
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NETWORK WORKING GROUP                                        N. Williams
Internet-Draft                                                       Sun
Expires: December 30, 2004                                     July 2004



            GSS-API Domain-Based Service Names and Name Type
            draft-williams-gssapi-domain-based-names-00.txt


Status of this Memo


   By submitting this Internet-Draft, I certify that any applicable
   patent or other IPR claims of which I am aware have been disclosed,
   and any of which I become aware will be disclosed, in accordance with
   RFC 3668.


   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 December 30, 2004.


Copyright Notice


   Copyright (C) The Internet Society (2004).  All Rights Reserved.


Abstract


   This document describes domainname-based service principal names and
   the corresponding name type for the 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
   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. Normative  . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
      Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 8
      Intellectual Property and Copyright Statements . . . . . . . . . 9









































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1.  Conventions used in this document


   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 with SASL and the Kerberos V GSS-API mechanism
   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.


   Domain based names can eliminate this problem by allowing LDAP
   service names to indicate which LDAP directory they are authorized to
   serve.


   A domain-based name consists of three required elements:
   o  a service name
   o  a domain name
   o  a hostname



























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3.  Name Type OID and Symbolic Name


   The new name type has an OID of
      [NOTE:  OID assignment to be made with IANA.]


      {iso(1) org(3) dod(6) internet(1) security(5) nametypes(6)
      gss-domain-based(5)}


   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


   There is a single syntax that applies to both query and display forms
   of domain-based names.  (We ignore string profile matters here as the
   GSS-API's, and its mechanisms' use of character strings are out of
   scope for this document.)


   The syntax is:
      domain-based-name :=
         | <service> '@' <domain> '@' <hostname>
         | <service> '@@' <hostname>


   The domain name element is only optional in the query syntax of
   domain-based names.


   A missing domain name is always to be added by the GSS-API mechanisms
   during name canonicalization, using whatever default values are
   appropriate for the mechanisms.


   Therefore the display form of domain-based MNs (see [RFC2743]) MUST
   include all three elements of domain-based names.


   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


   o  ldap@@ds1.example.tld
   o  address@hidden@ds1.example.tld


   o  kadmin@@kdc1.example.tld
   o  address@hidden@kdc1.example.tld





















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