Hash Of Root Key Certificate Extension
draft-ietf-lamps-hash-of-root-key-cert-extn-01

Document Type Active Internet-Draft (lamps WG)
Last updated 2018-11-12 (latest revision 2018-11-07)
Replaces draft-housley-hash-of-root-key-cert-extn
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Network Working Group                                         R. Housley
Internet-Draft                                            Vigil Security
Intended status: Informational                         November 07, 2018
Expires: May 11, 2019

                 Hash Of Root Key Certificate Extension
             draft-ietf-lamps-hash-of-root-key-cert-extn-01

Abstract

   This document specifies the Hash Of Root Key certificate extension.
   This certificate extension is carried in the self-signed certificate
   for a trust anchor, which is often called a Root Certification
   Authority (CA) certificate.  This certificate extension unambiguously
   identifies the next public key that will be used by the trust anchor
   at some point in the future.

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/.

   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 11, 2019.

Copyright Notice

   Copyright (c) 2018 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
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of

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   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 . . . . . . . . . . . . . . . . . . . . . . .   2
     1.2.  ASN.1 . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Hash Of Root Key Certificate Extension  . . . . . . . . . . .   4
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   5.  Operational Considerations  . . . . . . . . . . . . . . . . .   4
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   5
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Appendix A.  ASN.1 Module . . . . . . . . . . . . . . . . . . . .   7
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   This document specifies the Hash Of Root Key X.509 version 3
   certificate extension.  The extension is an optional addition to the
   Internet X.509 Public Key Infrastructure Certificate and Certificate
   Revocation List (CRL) Profile [RFC5280].  The certificate extension
   facilitates the orderly transition from one Root Certification
   Authority (CA) public key to the next.  It does so by publishing the
   hash value of the next generation public key in the current self-
   signed certificate.  This allows a relying party to unambiguously
   recognize the next generation public key when it becomes available,
   install that public key in the trust anchor store, and remove the
   previous public key from the trust anchor store.

   A Root CA Certificate MAY include the Hashed Root Key certificate
   extension to provide the hash value of the next public key that will
   be used by the Root CA.

1.1.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119][RFC8174] when, and only when, they appear in all
   capitals, as shown here.

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1.2.  ASN.1

   Certificates [RFC5280] are generated using ASN.1 [X680]; certificates
   are always encoded with the Distinguished Encoding Rules (DER)
   [X690].

2.  Overview

   Before the initial deployment of the Root CA, the following are
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