Lightweight CMP Profile
draft-ietf-lamps-lightweight-cmp-profile-03

Document Type Active Internet-Draft (lamps WG)
Authors Hendrik Brockhaus  , Steffen Fries  , David von Oheimb 
Last updated 2020-10-02
Replaces draft-brockhaus-lamps-lightweight-cmp-profile
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LAMPS Working Group                                         H. Brockhaus
Internet-Draft                                                  S. Fries
Intended status: Standards Track                           D. von Oheimb
Expires: April 5, 2021                                           Siemens
                                                         October 2, 2020

                        Lightweight CMP Profile
              draft-ietf-lamps-lightweight-cmp-profile-03

Abstract

   The goal of this document is to facilitate interoperability and
   automation by profiling the Certificate Management Protocol (CMP)
   version 2, the related Certificate Request Message Format (CRMF)
   version 2, and the HTTP Transfer for the Certificate Management
   Protocol.  It specifies a subset of CMP and CRMF focusing on typical
   uses cases relevant for managing certificates of devices in many
   industrial and IoT scenarios.  To limit the overhead of certificate
   management for more constrained devices only the most crucial types
   of operations are specified as mandatory.  To foster interoperability
   in more complex scenarios, other types of operations are specified as
   recommended or optional.

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 5, 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

Brockhaus, et al.         Expires April 5, 2021                 [Page 1]
Internet-Draft           Lightweight CMP Profile            October 2020

   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Motivation for profiling CMP  . . . . . . . . . . . . . .   4
     1.2.  Motivation for a lightweight profile for CMP  . . . . . .   5
     1.3.  Existing CMP profiles . . . . . . . . . . . . . . . . . .   5
     1.4.  Compatibility with existing CMP profiles  . . . . . . . .   7
     1.5.  Scope of this document  . . . . . . . . . . . . . . . . .   9
     1.6.  Structure of this document  . . . . . . . . . . . . . . .   9
     1.7.  Convention and Terminology  . . . . . . . . . . . . . . .  10
   2.  Architecture and use cases  . . . . . . . . . . . . . . . . .  11
     2.1.  Solution architecture . . . . . . . . . . . . . . . . . .  11
     2.2.  Basic generic CMP message content . . . . . . . . . . . .  12
     2.3.  Supported PKI management operations . . . . . . . . . . .  13
       2.3.1.  Mandatory PKI management operations . . . . . . . . .  13
       2.3.2.  Recommended PKI management operations . . . . . . . .  14
       2.3.3.  Optional PKI management operations  . . . . . . . . .  14
     2.4.  CMP message transport . . . . . . . . . . . . . . . . . .  15
   3.  Generic parts of the PKI message  . . . . . . . . . . . . . .  16
     3.1.  General description of the CMP message header . . . . . .  17
     3.2.  General description of the CMP message protection . . . .  19
     3.3.  General description of CMP message extraCerts . . . . . .  20
   4.  End Entity focused PKI management operations  . . . . . . . .  20
     4.1.  Requesting a new certificate from a PKI . . . . . . . . .  21
       4.1.1.  Request a certificate from a new PKI with signature
               protection  . . . . . . . . . . . . . . . . . . . . .  22
       4.1.2.  Request a certificate from a trusted PKI with
               signature protection  . . . . . . . . . . . . . . . .  28
       4.1.3.  Update an existing certificate with signature
               protection  . . . . . . . . . . . . . . . . . . . . .  29
       4.1.4.  Request a certificate from a PKI with MAC protection   30
       4.1.5.  Request a certificate from a legacy PKI using PKCS#10
               request . . . . . . . . . . . . . . . . . . . . . . .  32
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