Updates to and Operational Guidance for the DANE Protocol
draft-ietf-dane-ops-15

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Document Type Active Internet-Draft (dane WG)
Last updated 2015-08-08
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Intended RFC status Proposed Standard
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Document shepherd Warren Kumari
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IANA IANA review state Version Changed - Review Needed
DANE                                                         V. Dukhovni
Internet-Draft                                              Unaffiliated
Updates: 6698 (if approved)                                  W. Hardaker
Intended status: Standards Track                                 Parsons
Expires: February 10, 2016                                August 9, 2015

       Updates to and Operational Guidance for the DANE Protocol
                         draft-ietf-dane-ops-15

Abstract

   This document clarifies and updates the DNS-Based Authentication of
   Named Entities (DANE) TLSA specification (RFC6698) based on
   subsequent implementation experience.  It also contains guidance for
   implementers, operators and protocol developers who want to make use
   of DANE records.

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 http://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 February 10, 2016.

Copyright Notice

   Copyright (c) 2015 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
   (http://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
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of

Dukhovni & Hardaker     Expires February 10, 2016               [Page 1]
Internet-Draft               DANE operations                 August 2015

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  DANE TLSA Record Overview . . . . . . . . . . . . . . . . . .   5
     2.1.  Example TLSA record . . . . . . . . . . . . . . . . . . .   6
   3.  DANE TLS Requirements . . . . . . . . . . . . . . . . . . . .   6
   4.  DANE Certificate Usage Selection Guidelines . . . . . . . . .   6
     4.1.  Opportunistic Security and PKIX usages  . . . . . . . . .   7
     4.2.  Interaction with Certificate Transparency . . . . . . . .   8
     4.3.  Switching from/to PKIX-TA/EE to/from DANE-TA/EE . . . . .   8
   5.  Certificate-Usage-Specific DANE Updates and Guidelines  . . .   9
     5.1.  Certificate Usage DANE-EE(3)  . . . . . . . . . . . . . .   9
     5.2.  Certificate Usage DANE-TA(2)  . . . . . . . . . . . . . .  11
     5.3.  Certificate Usage PKIX-EE(1)  . . . . . . . . . . . . . .  14
     5.4.  Certificate Usage PKIX-TA(0)  . . . . . . . . . . . . . .  14
   6.  Service Provider and TLSA Publisher Synchronization . . . . .  15
   7.  TLSA Base Domain and CNAMEs . . . . . . . . . . . . . . . . .  18
   8.  TLSA Publisher Requirements . . . . . . . . . . . . . . . . .  19
     8.1.  Key rollover with fixed TLSA Parameters . . . . . . . . .  19
     8.2.  Switching to DANE-TA from DANE-EE . . . . . . . . . . . .  20
     8.3.  Switching to New TLSA Parameters  . . . . . . . . . . . .  21
     8.4.  TLSA Publisher Requirements Summary . . . . . . . . . . .  22
   9.  Digest Algorithm Agility  . . . . . . . . . . . . . . . . . .  22
   10. General DANE Guidelines . . . . . . . . . . . . . . . . . . .  24
     10.1.  DANE DNS Record Size Guidelines  . . . . . . . . . . . .  24
     10.2.  Certificate Name Check Conventions . . . . . . . . . . .  25
     10.3.  Design Considerations for Protocols Using DANE . . . . .  26
   11. Note on DNSSEC Security . . . . . . . . . . . . . . . . . . .  26
   12. Summary of Updates to RFC6698 . . . . . . . . . . . . . . . .  27
   13. Operational Considerations  . . . . . . . . . . . . . . . . .  28
   14. Security Considerations . . . . . . . . . . . . . . . . . . .  29
   15. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  29
   16. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  29
   17. References  . . . . . . . . . . . . . . . . . . . . . . . . .  29
     17.1.  Normative References . . . . . . . . . . . . . . . . . .  29
     17.2.  Informative References . . . . . . . . . . . . . . . . .  31
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  31
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