Registration Data Access Protocol (RDAP) Object Tagging
draft-hollenbeck-regext-rdap-object-tag-04

Versions: 00 01 02 03 04                                                
Registration Protocols Extensions                          S. Hollenbeck
Internet-Draft                                             Verisign Labs
Updates: 7484 (if approved)                                    A. Newton
Intended status: Best Current Practice                              ARIN
Expires: April 8, 2018                                   October 5, 2017


        Registration Data Access Protocol (RDAP) Object Tagging
               draft-hollenbeck-regext-rdap-object-tag-04

Abstract

   The Registration Data Access Protocol (RDAP) includes a method that
   can be used to identify the authoritative server for processing
   domain name, IP address, and autonomous system number queries.  The
   method does not describe how to identify the authoritative server for
   processing other RDAP query types, such as entity queries.  This
   limitation exists because the identifiers associated with these query
   types are typically unstructured.  This document describes an
   operational practice that can be used to add structure to RDAP
   identifiers that makes it possible to identify the authoritative
   server for additional RDAP queries.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   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."

   This Internet-Draft will expire on April 8, 2018.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of



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   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Object Naming Practice  . . . . . . . . . . . . . . . . . . .   3
   3.  Bootstrap Service Registry for RDAP Service Providers . . . .   7
     3.1.  Registration Procedure  . . . . . . . . . . . . . . . . .   8
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
     4.1.  Bootstrap Service Registry for RDAP Service Providers . .   9
   5.  Implementation Status . . . . . . . . . . . . . . . . . . . .   9
     5.1.  Verisign Labs . . . . . . . . . . . . . . . . . . . . . .   9
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  10
     8.3.  URIs  . . . . . . . . . . . . . . . . . . . . . . . . . .  11
   Appendix A.  Change Log . . . . . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   The Registration Data Access Protocol (RDAP) includes a method
   ([RFC7484]) that can be used to identify the authoritative server for
   processing domain name, IP address, and autonomous system number
   (ASN) queries.  This method works because each of these data elements
   is structured in a way that facilitates automated parsing of the
   element and association of the data element with a particular RDAP
   service provider.  For example, domain names include labels (such as
   "com", "net", and "org") that are associated with specific service
   providers.

   As noted in Section 9 of RFC 7484 [RFC7484], the method does not
   describe how to identify the authoritative server for processing
   entity queries, name server queries, help queries, or queries using
   certain search patterns.  This limitation exists because the
   identifiers bound to these queries are typically not structured in a
   way that makes it easy to associate an identifier with a specific
   service provider.  This document describes an operational practice
   that can be used to add structure to RDAP identifiers that makes it
   possible to identify the authoritative server for additional RDAP
   queries.



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2.  Object Naming Practice

   Tagging object identifiers with a service provider tag makes it
   possible to identify the authoritative server for processing an RDAP
   query using the method described in RFC 7484 [RFC7484].  A service
   provider tag is constructed by prepending the Unicode TILDE character
   "~" (U+007E, described as an "unreserved" character in RFC 3986
   [RFC3986]) to an IANA-registered value that represents the service
   provider.  For example, a tag for a service provider identified by
   the string value "ARIN" is represented as "~ARIN".

   Service provider tags are concatenated to the end of RDAP query
   object identifiers to unambiguously identify the authoritative server
   for processing an RDAP query.  Building on the example from
   Section 3.1.5 of RFC 7482 [RFC7482], an RDAP entity handle can be
   constructed that allows an RDAP client to bootstrap an entity query.
   The following identifier is used to find information for the entity
   associated with handle "XXXX" at service provider "ARIN":

   XXXX~ARIN

   Clients that wish to bootstrap an entity query can parse this
   identifier into distinct handle and service provider identifier
   elements.  Handles can themselves contain TILDE characters; the
   service provider identifier is found following the last TILDE
   character in the tagged identifier.  The service provider identifier
   is used to retrieve a base RDAP URL from an IANA registry.  The base
   URL and entity handle are then used to form a complete RDAP query
   path segment.  For example, if the base RDAP URL
   "https://example.com/rdap/" is associated with service provider
   "YYYY" in an IANA registry, an RDAP client will parse a tagged entity
   identifier "XXXX~YYYY" into distinct handle ("XXXX") and service
   provider ("YYYY") identifiers.  The service provider identifier
   "YYYY" is used to query an IANA registry to retrieve the base RDAP
   URL "https://example.com/rdap/".  The base RDAP URL is concatenated
   to the entity handle to create a complete RDAP query path segment of
   "https://example.com/rdap/entity/XXXX~YYYY".

   Implementation of this practice requires tagging of unstructured
   potential query identifiers in RDAP responses.  Consider these elided
   examples from Section 5.3 of RFC 7483 [RFC7483] in which the handle
   identifiers have been tagged with a service provider tag:

   {
     "objectClassName" : "domain",
     "handle" : "XXXX~RIR",
     "ldhName" : "0.2.192.in-addr.arpa",
     "nameservers" :



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     [
       ...
     ],
     "secureDNS":
     {
       ...
     },
     "remarks" :
     [
       ...
     ],
     "links" :
     [
       ...
     ],
     "events" :
     [
       ...
     ],
     "entities" :
     [
       {
         "objectClassName" : "entity",
         "handle" : "XXXX~RIR",
         "vcardArray":
         [
           ...
         ],
         "roles" : [ "registrant" ],
         "remarks" :
         [
           ...
         ],
         "links" :
         [
           ...
         ],
         "events" :
         [
           ...
         ]
       }
     ],
     "network" :
     {
       "objectClassName" : "ip network",
       "handle" : "XXXX~RIR",
       "startAddress" : "192.0.2.0",



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       "endAddress" : "192.0.2.255",
       "ipVersion" : "v4",
       "name": "NET-RTR-1",
       "type" : "DIRECT ALLOCATION",
       "country" : "AU",
       "parentHandle" : "YYYY~RIR",
       "status" : [ "active" ]
     }
   }

                                 Figure 1

   {
     "objectClassName" : "domain",
     "handle" : "XXXX~DNR",
     "ldhName" : "xn--fo-5ja.example",
     "unicodeName" : "foo.example",
     "variants" :
     [
       ...
     ],
     "status" : [ "locked", "transfer prohibited" ],
     "publicIds":
     [
       ...
     ],
     "nameservers" :
     [
       {
         "objectClassName" : "nameserver",
         "handle" : "XXXX~DNR",
         "ldhName" : "ns1.example.com",
         "status" : [ "active" ],
         "ipAddresses" :
         {
           ...
         },
         "remarks" :
         [
           ...
         ],
         "links" :
         [
           ...
         ],
         "events" :
         [
           ...



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         ]
       },
       {
         "objectClassName" : "nameserver",
         "handle" : "XXXX~DNR",
         "ldhName" : "ns2.example.com",
         "status" : [ "active" ],
         "ipAddresses" :
         {
           ...
         },
         "remarks" :
         [
           ...
         ],
         "links" :
         [
           ...
         ],
         "events" :
         [
           ...
         ]
       }
      ],
      "secureDNS":
      {
        ...
      },
      "remarks" :
      [
        ...
      ],
      "links" :
      [
        ...
      ],
      "port43" : "whois.example.net",
      "events" :
      [
        ...
      ],
      "entities" :
      [
        {
          "objectClassName" : "entity",
          "handle" : "XXXX~ABC",
          "vcardArray":



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          [
            ...
          ],
          "status" : [ "validated", "locked" ],
          "roles" : [ "registrant" ],
          "remarks" :
          [
            ...
          ],
          "links" :
          [
            ...
          ],
          "events" :
          [
            ...
          ]
        }
      ]
   }

                                 Figure 2

   As described in Section 5 of RFC 7483 [RFC7483], RDAP responses can
   contain "self" links.  Service provider tags and self references
   SHOULD be consistent.  If they are inconsistent, the service provider
   tag is processed with higher priority when using these values to
   identify a service provider.

   There is a risk of unpredictable processing behavior if the TILDE
   character is used for naturally occurring, non-separator purposes in
   an entity handle.  This could lead to a client mistakenly assuming
   that a TILDE character represents a separator and the text that
   follows TILDE is a service provider identifier.  A client that
   queries the IANA registry for what they assume is a valid service
   provider will likely receive an unexpected invalid result.  As a
   consequence, the TILDE character MUST NOT be used in an entity handle
   for any purpose other than to separate an object identifier from a
   service provider tag.

3.  Bootstrap Service Registry for RDAP Service Providers

   The bootstrap service registry for the RDAP service provider space is
   represented using the structure specified in Section 3 of RFC 7484
   [RFC7484].  The JSON output of this registry contains alphanumeric
   identifiers that identify RDAP service providers, grouped by base
   RDAP URLs, as shown in this example.




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   {
     "version": "1.0",
     "publication": "YYYY-MM-DDTHH:MM:SSZ",
     "description": "RDAP service provider bootstrap values",
     "services": [
       [
         ["YYYY"],
         [
           "https://example.com/rdap/"
         ]
       ],
       [
         ["ZZ54"],
         [
           "http://rdap.example.org/"
         ]
       ],
       [
         ["1754"],
         [
           "https://example.net/rdap/",
           "http://example.net/rdap/"
         ]
       ]
     ]
    }

                                 Figure 3

   Alphanumeric service provider identifiers conform to the syntax
   specified in the IANA registry of Extensible Provisioning Protocol
   (EPP) Repository Identifiers [1].

3.1.  Registration Procedure

   The service provider registry is populated using the "First Come
   First Served" policy defined in RFC 5226 [RFC5226].  Provider
   identifier values can be derived and assigned by IANA on request.
   Registration requests include the requested service provider
   identifier (or an indication that IANA should assign an identifier)
   and one or more base RDAP URLs to be associated with the service
   provider identifier.

4.  IANA Considerations

   IANA is requested to create the RDAP Bootstrap Services Registry
   listed below and make it available as JSON objects.  The contents of




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   this registry is described in Section 3, with the formal syntax
   specified in Section 10 of RFC 7484 [RFC7484].

4.1.  Bootstrap Service Registry for RDAP Service Providers

   Entries in this registry contain at least the following:

   o  An alphanumeric value that identifies the RDAP service provider
      being registered.
   o  One or more URLs that provide the RDAP service regarding this
      registration.

5.  Implementation Status

   NOTE: Please remove this section and the reference to RFC 7942 prior
   to publication as an RFC.

   This section records the status of known implementations of the
   protocol defined by this specification at the time of posting of this
   Internet-Draft, and is based on a proposal described in RFC 7942
   [RFC7942].  The description of implementations in this section is
   intended to assist the IETF in its decision processes in progressing
   drafts to RFCs.  Please note that the listing of any individual
   implementation here does not imply endorsement by the IETF.
   Furthermore, no effort has been spent to verify the information
   presented here that was supplied by IETF contributors.  This is not
   intended as, and must not be construed to be, a catalog of available
   implementations or their features.  Readers are advised to note that
   other implementations may exist.

   According to RFC 7942, "this will allow reviewers and working groups
   to assign due consideration to documents that have the benefit of
   running code, which may serve as evidence of valuable experimentation
   and feedback that have made the implemented protocols more mature.
   It is up to the individual working groups to use this information as
   they see fit".

5.1.  Verisign Labs

      Responsible Organization: Verisign Labs
      Location: https://rdap.verisignlabs.com/
      Description: This implementation includes support for domain
      registry RDAP queries using live data from the .cc and .tv country
      code top-level domains.  Client authentication is required to
      receive entity information in query responses.
      Level of Maturity: This is a "proof of concept" research
      implementation.




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      Coverage: This implementation includes all of the features
      described in this specification.
      Contact Information: Scott Hollenbeck, shollenbeck@verisign.com

6.  Security Considerations

   This practice helps to ensure that end users will get RDAP data from
   an authoritative source using a bootstrap method to find
   authoritative RDAP servers, reducing the risk of sending queries to
   non-authoritative sources.  The method has the same security
   properties as the RDAP protocols themselves.  The transport used to
   access the IANA registries can be more secure by using TLS [RFC5246],
   which IANA supports.  Additional considerations associated with RDAP
   are described in RFC 7481 [RFC7481].

7.  Acknowledgements

   The author would like to acknowledge the following individuals for
   their contributions to the development of this document: Tom
   Harrison, and Marcos Sanz.  In addition, the authors would like to
   recognize the Regional Internet Registry (RIR) operators (AFRINIC,
   APNIC, ARIN, LACNIC, and RIPE) that have been implementing and using
   the practice of tagging handle identifiers for several years.  Their
   experience provided significant inspiration for the development of
   this document.

8.  References

8.1.  Normative References

   [RFC5226]  Narten, T. and H. Alvestrand, "Guidelines for Writing an
              IANA Considerations Section in RFCs", RFC 5226,
              DOI 10.17487/RFC5226, May 2008,
              <https://www.rfc-editor.org/info/rfc5226>.

   [RFC7484]  Blanchet, M., "Finding the Authoritative Registration Data
              (RDAP) Service", RFC 7484, DOI 10.17487/RFC7484, March
              2015, <https://www.rfc-editor.org/info/rfc7484>.

8.2.  Informative References

   [RFC3986]  Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
              Resource Identifier (URI): Generic Syntax", STD 66,
              RFC 3986, DOI 10.17487/RFC3986, January 2005,
              <https://www.rfc-editor.org/info/rfc3986>.






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   [RFC5246]  Dierks, T. and E. Rescorla, "The Transport Layer Security
              (TLS) Protocol Version 1.2", RFC 5246,
              DOI 10.17487/RFC5246, August 2008,
              <https://www.rfc-editor.org/info/rfc5246>.

   [RFC7481]  Hollenbeck, S. and N. Kong, "Security Services for the
              Registration Data Access Protocol (RDAP)", RFC 7481,
              DOI 10.17487/RFC7481, March 2015,
              <https://www.rfc-editor.org/info/rfc7481>.

   [RFC7482]  Newton, A. and S. Hollenbeck, "Registration Data Access
              Protocol (RDAP) Query Format", RFC 7482,
              DOI 10.17487/RFC7482, March 2015,
              <https://www.rfc-editor.org/info/rfc7482>.

   [RFC7483]  Newton, A. and S. Hollenbeck, "JSON Responses for the
              Registration Data Access Protocol (RDAP)", RFC 7483,
              DOI 10.17487/RFC7483, March 2015,
              <https://www.rfc-editor.org/info/rfc7483>.

   [RFC7942]  Sheffer, Y. and A. Farrel, "Improving Awareness of Running
              Code: The Implementation Status Section", BCP 205,
              RFC 7942, DOI 10.17487/RFC7942, July 2016,
              <https://www.rfc-editor.org/info/rfc7942>.

8.3.  URIs

   [1] http://www.iana.org/assignments/epp-repository-ids/epp-
       repository-ids.xhtml#epp-repository-ids-1

Appendix A.  Change Log

   00:  Initial version.
   01:  Changed separator character from HYPHEN MINUS to COMMERCIAL AT.
      Added a recommendation to maintain consistency between service
      provider tags and "self" links (suggestion received from Tom
      Harrison).  Fixed a spelling error, and corrected the network
      example in Section 2 (editorial erratum reported for RFC 7483 by
      Marcos Sanz).  Added acknowledgements.
   02:  Changed separator character from COMMERCIAL AT to TILDE.
      Clarity updates and fixed an example handle.  Added text to
      describe the risk of separator characters appearing naturally in
      entity handles and being misinterpreted as separator characters.
   03:  Added Implementation Status section (Section 5).
   04:  Keepalive refresh.






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Authors' Addresses

   Scott Hollenbeck
   Verisign Labs
   12061 Bluemont Way
   Reston, VA  20190
   USA

   Email: shollenbeck@verisign.com
   URI:   http://www.verisignlabs.com/


   Andrew Lee Newton
   American Registry for Internet Numbers
   PO Box 232290
   Centreville, VA  20120
   US

   Email: andy@arin.net
   URI:   http://www.arin.net































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