Support for Short-Term, Automatically-Renewed (STAR) Certificates in Automated Certificate Management Environment (ACME)
draft-ietf-acme-star-02

Document Type Active Internet-Draft (acme WG)
Last updated 2017-11-29
Replaces draft-sheffer-acme-star
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ACME Working Group                                            Y. Sheffer
Internet-Draft                                                    Intuit
Intended status: Standards Track                                D. Lopez
Expires: June 2, 2018                                O. Gonzalez de Dios
                                                       A. Pastor Perales
                                                          Telefonica I+D
                                                              T. Fossati
                                                                   Nokia
                                                       November 29, 2017

  Support for Short-Term, Automatically-Renewed (STAR) Certificates in
          Automated Certificate Management Environment (ACME)
                        draft-ietf-acme-star-02

Abstract

   Public-key certificates need to be revoked when they are compromised,
   that is, when the associated private key is exposed to an attacker.
   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) 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 June 2, 2018.

Sheffer, et al.           Expires June 2, 2018                  [Page 1]
Internet-Draft                  ACME STAR                  November 2017

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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 . . . . . . . . . . . . . . . . . . . . . . . .   5
     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
   4.  Operational Considerations  . . . . . . . . . . . . . . . . .  11
     4.1.  Define "short"  . . . . . . . . . . . . . . . . . . . . .  11
     4.2.  Clock Skew  . . . . . . . . . . . . . . . . . . . . . . .  11
     4.3.  Certificate Transparency (CT) Logs  . . . . . . . . . . .  11
   5.  Implementation Status . . . . . . . . . . . . . . . . . . . .  11
     5.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .  12
       5.1.1.  ACME Server with STAR extension . . . . . . . . . . .  12
       5.1.2.  STAR Proxy  . . . . . . . . . . . . . . . . . . . . .  12
     5.2.  Level of Maturity . . . . . . . . . . . . . . . . . . . .  13
     5.3.  Coverage  . . . . . . . . . . . . . . . . . . . . . . . .  13
     5.4.  Version Compatibility . . . . . . . . . . . . . . . . . .  13
     5.5.  Licensing . . . . . . . . . . . . . . . . . . . . . . . .  13
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