Message Digest for DNS Zones
draft-ietf-dnsop-dns-zone-digest-14

Document Type Active Internet-Draft (dnsop WG)
Authors Duane Wessels  , Piet Barber  , Matt Weinberg  , Warren Kumari  , Wes Hardaker 
Last updated 2020-11-20 (latest revision 2020-10-15)
Replaces draft-wessels-dns-zone-digest
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Details
Internet Engineering Task Force                               D. Wessels
Internet-Draft                                                 P. Barber
Intended status: Standards Track                                Verisign
Expires: April 18, 2021                                      M. Weinberg
                                                                  Amazon
                                                               W. Kumari
                                                                  Google
                                                             W. Hardaker
                                                                 USC/ISI
                                                        October 15, 2020

                      Message Digest for DNS Zones
                  draft-ietf-dnsop-dns-zone-digest-14

Abstract

   This document describes a protocol and new DNS Resource Record that
   provides a cryptographic message digest over DNS zone data at rest.
   The ZONEMD Resource Record conveys the digest data in the zone
   itself.  When used in combination with DNSSEC, ZONEMD allows
   recipients to verify the zone contents for data integrity and origin
   authenticity.  This provides assurance that received zone data
   matches published data, regardless of how the zone data has been
   transmitted and received.  When used without DNSSEC, ZONEMD functions
   as a checksum, guarding only against unintentional changes.

   ZONEMD does not replace DNSSEC.  Whereas DNSSEC protects individual
   RRSets (DNS data with fine granularity), ZONEMD protects a zone's
   data as a whole, whether consumed by authoritative name servers,
   recursive name servers, or any other applications.

   As specified herein, ZONEMD is impractical for large, dynamic zones
   due to the time and resources required for digest calculation.
   However, The ZONEMD record is extensible so that new digest schemes
   may be added in the future to support large, dynamic zones.

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/.

Wessels, et al.          Expires April 18, 2021                 [Page 1]
Internet-Draft               DNS Zone Digest                October 2020

   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 18, 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
   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  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Motivation  . . . . . . . . . . . . . . . . . . . . . . .   4
     1.2.  Alternative Approaches  . . . . . . . . . . . . . . . . .   4
     1.3.  Design Overview . . . . . . . . . . . . . . . . . . . . .   6
     1.4.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . .   6
       1.4.1.  Root Zone . . . . . . . . . . . . . . . . . . . . . .   6
       1.4.2.  Providers, Secondaries, and Anycast . . . . . . . . .   7
       1.4.3.  Response Policy Zones . . . . . . . . . . . . . . . .   7
       1.4.4.  Centralized Zone Data Service . . . . . . . . . . . .   7
       1.4.5.  General Purpose Comparison Check  . . . . . . . . . .   7
     1.5.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   8
   2.  The ZONEMD Resource Record  . . . . . . . . . . . . . . . . .   8
     2.1.  Non-apex ZONEMD Records . . . . . . . . . . . . . . . . .   8
     2.2.  ZONEMD RDATA Wire Format  . . . . . . . . . . . . . . . .   8
       2.2.1.  The Serial Field  . . . . . . . . . . . . . . . . . .   9
       2.2.2.  The Scheme Field  . . . . . . . . . . . . . . . . . .   9
       2.2.3.  The Hash Algorithm Field  . . . . . . . . . . . . . .   9
       2.2.4.  The Digest Field  . . . . . . . . . . . . . . . . . .  10
     2.3.  ZONEMD Presentation Format  . . . . . . . . . . . . . . .  10
     2.4.  ZONEMD Example  . . . . . . . . . . . . . . . . . . . . .  10
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