Secret Key Transaction Authentication for DNS (TSIG)
draft-ietf-dnsop-rfc2845bis-02

Document Type Active Internet-Draft (dnsop WG)
Last updated 2018-11-19
Replaces draft-dupont-dnsop-rfc2845bis
Stream IETF
Intended RFC status Internet Standard
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Internet Engineering Task Force                                F. Dupont
Internet-Draft                                                 S. Morris
Obsoletes: 2845, 4635 (if approved)                                  ISC
Intended status: Standards Track                                P. Vixie
Expires: May 23, 2019                                           Farsight
                                                         D. Eastlake 3rd
                                                                  Huawei
                                                          O. Gudmundsson
                                                              CloudFlare
                                                           B. Wellington
                                                                  Akamai
                                                       November 19, 2018

          Secret Key Transaction Authentication for DNS (TSIG)
                     draft-ietf-dnsop-rfc2845bis-02

Abstract

   This protocol allows for transaction level authentication using
   shared secrets and one way hashing.  It can be used to authenticate
   dynamic updates as coming from an approved client, or to authenticate
   responses as coming from an approved name server.

   No provision has been made here for distributing the shared secrets.

   This document includes revised original TSIG specifications (RFC2845)
   and its extension for HMAC-SHA (RFC4635).

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
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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 23, 2019.

Dupont, et al.            Expires May 23, 2019                  [Page 1]
Internet-Draft                  DNS TSIG                   November 2018

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   than English.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Key words . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  New Assigned Numbers  . . . . . . . . . . . . . . . . . . . .   5
   4.  TSIG RR Format  . . . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  TSIG RR Type  . . . . . . . . . . . . . . . . . . . . . .   5
     4.2.  TSIG Calculation  . . . . . . . . . . . . . . . . . . . .   5
     4.3.  TSIG Record Format  . . . . . . . . . . . . . . . . . . .   5
     4.4.  Example . . . . . . . . . . . . . . . . . . . . . . . . .   7
   5.  Protocol Operation  . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  Effects of adding TSIG to outgoing message  . . . . . . .   8
     5.2.  TSIG processing on incoming messages  . . . . . . . . . .   8
     5.3.  Time values used in TSIG calculations . . . . . . . . . .   8
     5.4.  TSIG Variables and Coverage . . . . . . . . . . . . . . .   9
       5.4.1.  DNS Message . . . . . . . . . . . . . . . . . . . . .   9
       5.4.2.  TSIG Variables  . . . . . . . . . . . . . . . . . . .   9
       5.4.3.  Request MAC . . . . . . . . . . . . . . . . . . . . .  10
     5.5.  Component Padding . . . . . . . . . . . . . . . . . . . .  10
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