ACME Client Extension
draft-moriarty-acme-client-00

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IETF                                                         K. Moriarty
Internet-Draft                                                  Dell EMC
Intended status: Standards Track                          March 29, 2019
Expires: September 19, 2019

                         ACME Client Extension
                     draft-moriarty-acme-client-00

Abstract

   Automated Certificate Management Environment (ACME) core protocol
   addresses the use case of web server certificates for TLS.  This
   document extends the ACME protocol to support end user client, device
   client, and code signing certificates.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on September 19, 2019.

Copyright Notice

   Copyright (c) 2019 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
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   described in the Simplified BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Identity Proofing for Client Certificates . . . . . . . . . .   2
   3.  Key Storage . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Why Not EST . . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Device Certificates . . . . . . . . . . . . . . . . . . . . .   5
   6.  End USer Client Certificates  . . . . . . . . . . . . . . . .   6
   7.  CodeSigning Certificates  . . . . . . . . . . . . . . . . . .   7
   8.  Pre-authorization . . . . . . . . . . . . . . . . . . . . . .   9
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   11. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  10
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  10
     12.2.  Informative References . . . . . . . . . . . . . . . . .  10
     12.3.  URL References . . . . . . . . . . . . . . . . . . . . .  10
   Appendix A.  Change Log . . . . . . . . . . . . . . . . . . . . .  12
   Appendix B.  Open Issues  . . . . . . . . . . . . . . . . . . . .  12
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   ACME [RFC8555] is a mechanism for automating certificate management
   on the Internet.  It enables administrative entities to prove
   effective control over resources like domain names, and automates the
   process of generating and issuing certificates.

   ACME was designed for web server certificates with the possibility to
   create extensions for other use cases and certificate types.  End
   user and device certificates may also benefit from automated
   management to ease the deployment and maintenance of these
   certificates type, thus the definition of the extension for that
   purpose in this document.

2.  Identity Proofing for Client Certificates

   As with the TLS certificates defined in the core ACME document,
   identity proofing for ACME issued end user client, device client, and
   code signing certificates was not covered in RFC8555.

   Identity proofing for these certificate types present some challenges
   for process automation.  NIST SP 800-63 r3 [NIST800-63r3] serves as
   guidance for identity proofing further detailed in NIST SP 800-63A
   [NIST800-63A] that may occur prior to the ability to automate
   certificate management via ACME or may obviate the need for it
   weighing end user privacy as a higher concern and allowing for
   credential issuance to be decoupled from identity proofing (IAL1).

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