Support for Short-Term, Automatically-Renewed (STAR) Certificates in Automated Certificate Management Environment (ACME)
draft-ietf-acme-star-04

Document Type Active Internet-Draft (acme WG)
Last updated 2018-10-19
Replaces draft-sheffer-acme-star
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ACME Working Group                                            Y. Sheffer
Internet-Draft                                                    Intuit
Intended status: Standards Track                                D. Lopez
Expires: April 22, 2019                              O. Gonzalez de Dios
                                                       A. Pastor Perales
                                                          Telefonica I+D
                                                              T. Fossati
                                                                   Nokia
                                                        October 19, 2018

  Support for Short-Term, Automatically-Renewed (STAR) Certificates in
          Automated Certificate Management Environment (ACME)
                        draft-ietf-acme-star-04

Abstract

   Public-key certificates need to be revoked when they are compromised,
   that is, when the associated private key is exposed to an
   unauthorized entity.  However the revocation process is often
   unreliable.  An alternative to revocation is issuing a sequence of
   certificates, each with a short validity period, and terminating this
   sequence upon compromise.  This memo proposes an ACME extension to
   enable the issuance of short-term and automatically renewed (STAR)
   X.509 certificates.

   [RFC Editor: please remove before publication]

   While the draft is being developed, the editor's version can be found
   at https://github.com/yaronf/I-D/tree/master/STAR.

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 April 22, 2019.

Sheffer, et al.          Expires April 22, 2019                 [Page 1]
Internet-Draft                  ACME STAR                   October 2018

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Name Delegation Use Case  . . . . . . . . . . . . . . . .   4
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
     1.3.  Conventions used in this document . . . . . . . . . . . .   4
   2.  Protocol Flow . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Bootstrap . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  Refresh . . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.3.  Termination . . . . . . . . . . . . . . . . . . . . . . .   6
   3.  Protocol Details  . . . . . . . . . . . . . . . . . . . . . .   7
     3.1.  ACME Extensions . . . . . . . . . . . . . . . . . . . . .   7
       3.1.1.  Extending the Order Resource  . . . . . . . . . . . .   7
       3.1.2.  Canceling a Recurrent Order . . . . . . . . . . . . .   8
     3.2.  Capability Discovery  . . . . . . . . . . . . . . . . . .   9
     3.3.  Fetching the Certificates . . . . . . . . . . . . . . . .  10
     3.4.  Negotiate unauthenticated GET . . . . . . . . . . . . . .  12
   4.  Operational Considerations  . . . . . . . . . . . . . . . . .  12
     4.1.  The Meaning of "Short Term" and the Impact of Skewed
           Clocks  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     4.2.  Impact on Certificate Transparency (CT) Logs  . . . . . .  13
     4.3.  Dependability . . . . . . . . . . . . . . . . . . . . . .  13
   5.  Implementation Status . . . . . . . . . . . . . . . . . . . .  14
     5.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .  14
       5.1.1.  ACME Server with STAR extension . . . . . . . . . . .  14
       5.1.2.  STAR Proxy  . . . . . . . . . . . . . . . . . . . . .  15
     5.2.  Level of Maturity . . . . . . . . . . . . . . . . . . . .  15
     5.3.  Coverage  . . . . . . . . . . . . . . . . . . . . . . . .  15
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