CMP Updates
draft-brockhaus-lamps-cmp-updates-00

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Internet Engineering Task Force                             H. Brockhaus
Internet-Draft                                                   Siemens
Updates: 4210 (if approved)                                 July 7, 2019
Intended status: Standards Track
Expires: January 8, 2020

                              CMP Updates
                  draft-brockhaus-lamps-cmp-updates-00

Abstract

   This document contains a set of updates to the base syntax of
   Certificate Management Protocol (CMP) version 2.  This document
   updates RFC 4210.

   Specifically, the CMP services updated in this document comprise:
   Enable protection of server-side key generation using elliptic curve
   algorithms and the definition of an extended key usage to identify
   certificates of CMP endpoints on registration authorities and
   certification authorities.

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
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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
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on January 8, 2020.

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
   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

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   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
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Convention and Terminology  . . . . . . . . . . . . . . .   3
   2.  Updates to RFC 4210 - Certificate Management Protocol (CMP) .   3
     2.1.  New Section 1.1. - Changes since RFC 4210 . . . . . . . .   3
     2.2.  Replace Section 5.2.2. - Encrypted Values . . . . . . . .   4
     2.3.  Update Section 5.3.4. - Certification Response  . . . . .   5
     2.4.  Update Section 5.3.19.9. - Revocation Passphrase  . . . .   5
     2.5.  Update Appendix B - The Use of Revocation Passphrase  . .   6
     2.6.  Update Appendix C - Request Message Behavioral
           Clarifications  . . . . . . . . . . . . . . . . . . . . .   7
     2.7.  Update Appendix D.4. - Request Message Behavioral
           Clarifications  . . . . . . . . . . . . . . . . . . . . .   7
     2.8.  Insert section for EKUs like kp-id-cmpRA definition at an
           appropriate location. . . . . . . . . . . . . . . . . . .   7
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Appendix A.  ASN.1 Modules  . . . . . . . . . . . . . . . . . . .   9
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   While using CMP [RFC4210] in industrial and IoT environments and
   developing the Lightweight CMP Profile
   [I-D.brockhaus-lamps-industrial-cmp-profile] some limitations were
   identified in the original CMP specification.  This document updates
   RFC 4210 [RFC4210] to overcome these limitations.

   In general this document aims to improve the crypto agility of CMP to
   be flexible to react on future advances in cryptography.

   This document also introduces a new extended key usage to identify
   CMP services on registration and certification authorities.

   < TBD: While implementing CMP we identified some wording that could
   be more precise.  It can be discussed if such wording issued need to
   be addressed in the context of this document or not. >

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1.1.  Convention and Terminology

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