Delegation Information (Referrals) Signer for DNSSEC
draft-fujiwara-dnsop-delegation-information-signer-00

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Network Working Group                                        K. Fujiwara
Internet-Draft                                                      JPRS
Intended status: Standards Track                       November 03, 2020
Expires: May 7, 2021

          Delegation Information (Referrals) Signer for DNSSEC
         draft-fujiwara-dnsop-delegation-information-signer-00

Abstract

   DNSSEC does not protect delegation information, it contains NS RRSet
   on the parent side and glue records.  This document defines
   delegation information signer (DiS) resource record for protecting
   the delegation information, by inserting on the parent side of zone
   cut to hold a hash of delegation information.  The DiS resource
   record reuses the type code and wire format of DS resource record,
   and distinguishes it from existing DS RRSet by using a new digest
   type.  This document also describes the usage of DiS resource record
   and shows the implications on security-aware resolvers.  The
   definition and usage are compatible with current DNSSEC.

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
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   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 May 7, 2021.

Copyright Notice

   Copyright (c) 2020 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
   publication of this document.  Please review these documents

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   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   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.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Specification of the Delegation information Signer  . . . . .   3
     3.1.  New DS RR Usage: Delegation information signer (DiS)  . .   3
     3.2.  DiS resource record in a Zone . . . . . . . . . . . . . .   4
     3.3.  Change of Authoritative servers . . . . . . . . . . . . .   4
     3.4.  Change of validating resolvers  . . . . . . . . . . . . .   4
   4.  Compatibility with the current DNSSEC . . . . . . . . . . . .   4
   5.  Signing Priming Responses . . . . . . . . . . . . . . . . . .   5
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   5
   9.  Normative References  . . . . . . . . . . . . . . . . . . . .   5
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   The current DNSSEC specifications [RFC4033], [RFC4034], [RFC4035] do
   not protect the parent side NS RRSet and glue contained in the
   delegation information.

   Recently, the word "in-domain" is defined by [RFC8499].  The in-
   domain glue is necessary and sufficient glue information for name
   resolution.  [I-D.ietf-dnsop-glue-is-not-optional] proposes that Glue
   records are expected to be returned as part of a referral and if they
   cannot be fitted into the UDP response, TC=1 MUST be set to inform
   the client that the response is incomplete and that TCP SHOULD be
   used to retrieve the full response.

   Then, we can define complete delegation information set that contains
   the parent side NS RRSet and all in-domain glue.  We can generate a
   hash of the parent side NS RRSet and in-domain glue, and put it in
   DNS as a parent side information.

   The delegation information signer (DiS) resource record (RR) is
   inserted at a zone cut (i.e., a delegation point) to hold a hash of
   delegation information (parent side NS RRSet) and required glue.  The
   DiS resource record reuses DS resource record and distinguishes it
   from DS RRSet by using a new digest type and a new algorithm number.

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