Algorithm Requirements Update to the Internet X.509 Public Key Infrastructure Certificate Request Message Format (CRMF)
draft-ietf-lamps-crmf-update-algs-02

Document Type Active Internet-Draft (lamps WG)
Author Russ Housley 
Last updated 2020-12-30 (latest revision 2020-12-21)
Replaces draft-housley-lamps-crmf-update-algs
Stream IETF
Intended RFC status Proposed Standard
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Document shepherd Tim Hollebeek
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Network Working Group                                         R. Housley
Internet-Draft                                            Vigil Security
Updates: 4211 (if approved)                             21 December 2020
Intended status: Standards Track                                        
Expires: 24 June 2021

     Algorithm Requirements Update to the Internet X.509 Public Key
        Infrastructure Certificate Request Message Format (CRMF)
                  draft-ietf-lamps-crmf-update-algs-02

Abstract

   This document updates the cryptographic algorithm requirements for
   the Password-Based Message Authentication Code in the Internet X.509
   Public Key Infrastructure Certificate Request Message Format (CRMF)
   specified in RFC 4211.

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 24 June 2021.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Password-Based Message Authentication Code  . . . . . . . . .   2
     3.1.  Introduction Paragraph  . . . . . . . . . . . . . . . . .   2
     3.2.  One-Way Function  . . . . . . . . . . . . . . . . . . . .   3
     3.3.  Iteration Count . . . . . . . . . . . . . . . . . . . . .   3
     3.4.  MAC Algorithm . . . . . . . . . . . . . . . . . . . . . .   4
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   This document updates the cryptographic algorithm requirements for
   the Password-Based Message Authentication Code (MAC) in the Internet
   X.509 Public Key Infrastructure Certificate Request Message Format
   (CRMF) [RFC4211].  The algorithms specified in [RFC4211] were
   appropriate in 2005; however, these algorithms are no longer
   considered the best choices.  This update specifies algorithms that
   are more appropriate today.

2.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

3.  Password-Based Message Authentication Code

   Section 4.4 of [RFC4211] specifies a Password-Based MAC that relies
   on a one-way function to compute a symmetric key from the password
   and a MAC algorithm.  This section specifies algorithm requirements
   for the one-way function and the MAC algorithm.

3.1.  Introduction Paragraph

   Add guidance about limiting the use of the password.

   OLD:

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Internet-Draft     CRMF Algorithm Requirements Update      December 2020

      This MAC algorithm was designed to take a shared secret (a
      password) and use it to compute a check value over a piece of
      information.  The assumption is that, without the password, the
      correct check value cannot be computed.  The algorithm computes
      the one-way function multiple times in order to slow down any
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