ACME Integrations
draft-ietf-acme-integrations-01

Document Type Active Internet-Draft (acme WG)
Last updated 2020-07-13
Replaces draft-friel-acme-integrations
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Network Working Group                                           O. Friel
Internet-Draft                                                 R. Barnes
Intended status: Informational                                     Cisco
Expires: January 14, 2021                                 R. Shekh-Yusef
                                                                   Auth0
                                                           M. Richardson
                                                Sandelman Software Works
                                                           July 13, 2020

                           ACME Integrations
                    draft-ietf-acme-integrations-01

Abstract

   This document outlines multiple advanced use cases and integrations
   that ACME facilitates without any modifications or enhancements
   required to the base ACME specification.  The use cases include ACME
   integration with EST, BRSKI and TEAP.

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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   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
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   This Internet-Draft will expire on January 14, 2021.

Copyright Notice

   Copyright (c) 2020 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

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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  ACME Integration with EST . . . . . . . . . . . . . . . . . .   3
   4.  ACME Integration with BRSKI . . . . . . . . . . . . . . . . .   6
   5.  ACME Integration with BRSKI Default Cloud Registrar . . . . .   8
   6.  ACME Integration with TEAP  . . . . . . . . . . . . . . . . .  10
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
   9.  Informative References  . . . . . . . . . . . . . . . . . . .  14
   Appendix A.  Comments . . . . . . . . . . . . . . . . . . . . . .  15
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Introduction

   ACME [RFC8555] defines a protocol that a certificate authority (CA)
   and an applicant can use to automate the process of domain name
   ownership validation and X.509 (PKIX) certificate issuance.  The
   protocol is rich and flexible and enables multiple use cases that are
   not immediately obvious from reading the specification.  This
   document explicitly outlines multiple advanced ACME use cases
   including:

   o  ACME integration with EST [RFC7030]

   o  ACME integration with BRSKI
      [I-D.ietf-anima-bootstrapping-keyinfra]

   o  ACME integration with BRSKI Default Cloud Registrar
      [I-D.friel-anima-brski-cloud]

   o  ACME integration with TEAP [RFC7170] and TEAP Update and
      Extensions for Bootstrapping [I-D.lear-eap-teap-brski]

   The integrations with EST, BRSKI (which is based upon EST), and TEAP
   enable automated certificate enrolment for devices.

   ACME for subdomains [I-D.friel-acme-subdomains] outlines how ACME can
   be used by a client to obtain a certificate for a subdomain
   identifier from a certificate authority where the client has
   fulfilled a challenge against a parent domain, but does not need to
   fulfil a challenge against the explicit subdomain.  This is a useful
   optimization when ACME is used to issue certificates for large

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   numbers of devices as it reduces the domain ownership proof traffic
   (DNS or HTTP) and ACME traffic overhead, but is not a necessary
   requirement.

2.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
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