Algorithm Requirements Update to the Internet X.509 Public Key Infrastructure Certificate Request Message Format (CRMF)
draft-housley-lamps-crmf-update-algs-01

Document Type Active Internet-Draft (candidate for lamps WG)
Author Russ Housley 
Last updated 2020-11-20 (latest revision 2020-10-31)
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Network Working Group                                         R. Housley
Internet-Draft                                            Vigil Security
Updates: 4211 (if approved)                              31 October 2020
Intended status: Standards Track                                        
Expires: 4 May 2021

     Algorithm Requirements Update to the Internet X.509 Public Key
        Infrastructure Certificate Request Message Format (CRMF)
                draft-housley-lamps-crmf-update-algs-01

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 4 May 2021.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Password-Based Message Authentication Code  . . . . . . . . .   2
     3.1.  One-Way Function  . . . . . . . . . . . . . . . . . . . .   2
     3.2.  MAC Algorithm . . . . . . . . . . . . . . . . . . . . . .   3
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   3
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   4

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.  One-Way Function

   Change the paragraph describing the "owf" as follows:

   OLD:

      owf identifies the algorithm and associated parameters used to
      compute the key used in the MAC process.  All implementations MUST
      support SHA-1.

   NEW:

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      owf identifies the algorithm and associated parameters used to
      compute the key used in the MAC process.  All implementations MUST
      support SHA-256 [SHS].

3.2.  MAC Algorithm

   Change the paragraph describing the "mac" as follows:

   OLD:

      mac identifies the algorithm and associated parameters of the MAC
      function to be used.  All implementations MUST support HMAC-SHA1
      [HMAC].  All implementations SHOULD support DES-MAC and Triple-
      DES-MAC [PKCS11].
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