The DANE Authentication Chain Extension for TLS
draft-dukhovni-tls-dnssec-chain-02

Document Type Active Internet-Draft (individual)
Authors Viktor Dukhovni  , Shumon Huque  , Willem Toorop  , Paul Wouters  , Melinda Shore 
Last updated 2020-08-17 (latest revision 2020-06-14)
Stream ISE
Intended RFC status Experimental
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Network Working Group                                        V. Dukhovni
Internet-Draft                                                 Two Sigma
Intended status: Experimental                                   S. Huque
Expires: December 16, 2020                                    Salesforce
                                                               W. Toorop
                                                              NLnet Labs
                                                              P. Wouters
                                                                 Red Hat
                                                                M. Shore
                                                                  Fastly
                                                           June 14, 2020

            The DANE Authentication Chain Extension for TLS
                   draft-dukhovni-tls-dnssec-chain-02

Abstract

   This draft describes a new TLS extension for in-band transport of the
   complete set of DNSSEC validated records needed to perform DANE
   authentication of a TLS server without the need to perform separate
   out-of-band DNS lookups.  When the requisite DNS records do not
   exist, the extension conveys a validated denial of existence proof.

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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   This Internet-Draft will expire on December 16, 2020.

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

Dukhovni, et al.        Expires December 16, 2020               [Page 1]
Internet-Draft         TLS DNSSEC Chain Extension              June 2020

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Table of Contents

   1.  Requirements Notation . . . . . . . . . . . . . . . . . . . .   2
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  DNSSEC Authentication Chain Extension . . . . . . . . . . . .   4
     3.1.  Protocol, TLS 1.2 . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Protocol, TLS 1.3 . . . . . . . . . . . . . . . . . . . .   4
     3.3.  DNSSEC Authentication Chain Data  . . . . . . . . . . . .   5
       3.3.1.  Authenticated Denial of Existence . . . . . . . . . .   8
   4.  Construction of Serialized Authentication Chains  . . . . . .   8
   5.  Caching and Regeneration of the Authentication Chain  . . . .   9
   6.  Verification  . . . . . . . . . . . . . . . . . . . . . . . .   9
   7.  Extension pinning . . . . . . . . . . . . . . . . . . . . . .  10
   8.  Trust Anchor Maintenance  . . . . . . . . . . . . . . . . . .  12
   9.  Virtual Hosting . . . . . . . . . . . . . . . . . . . . . . .  12
   10. Operational Considerations  . . . . . . . . . . . . . . . . .  13
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  14
   12. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   13. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  15
   14. References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     14.1.  Normative References . . . . . . . . . . . . . . . . . .  15
     14.2.  Informative References . . . . . . . . . . . . . . . . .  16
   Appendix A.  Test vectors . . . . . . . . . . . . . . . . . . . .  18
     A.1.  _443._tcp.www.example.com . . . . . . . . . . . . . . . .  19
     A.2.  _25._tcp.example.com NSEC wildcard  . . . . . . . . . . .  23
     A.3.  _25._tcp.example.org NSEC3 wildcard . . . . . . . . . . .  24
     A.4.  _443._tcp.www.example.org CNAME . . . . . . . . . . . . .  26
     A.5.  _443._tcp.www.example.net DNAME . . . . . . . . . . . . .  27
     A.6.  _25._tcp.smtp.example.com NSEC Denial of Existence  . . .  29
     A.7.  _25._tcp.smtp.example.org NSEC3 Denial of Existence . . .  31
     A.8.  _443._tcp.www.insecure.example NSEC3 opt-out insecure
           delegation  . . . . . . . . . . . . . . . . . . . . . . .  33
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