Algorithm Identifiers for the HMAC-based Extract-and-Expand Key Derivation Function (HKDF)
draft-housley-hkdf-oids-01

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Last updated 2019-02-05
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INTERNET-DRAFT                                                R. Housley
Intended Status: Proposed Standard                        Vigil Security
Expires: 5 August 2019                                   5 February 2019

                     Algorithm Identifiers for the
      HMAC-based Extract-and-Expand Key Derivation Function (HKDF)
                    <draft-housley-hkdf-oids-01.txt>

Abstract

   RFC 5869 specifies the HMAC-based Extract-and-Expand Key Derivation
   Function (HKDF) algorithm.  This document assigns algorithm
   identifiers to the HKDF algorithm when used with three common one-way
   hash functions.

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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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
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Housley                                                         [Page 1]
INTERNET-DRAFT                 HKDF OIDs                   February 2019

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
     1.1.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  2
     1.2.  ASN.1  . . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2.  HKDF Algorithm Identifiers . . . . . . . . . . . . . . . . . .  2
   3.  ASN.1 Module . . . . . . . . . . . . . . . . . . . . . . . . .  3
   4.  Security Considerations  . . . . . . . . . . . . . . . . . . .  4
   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  4
   6.  References . . . . . . . . . . . . . . . . . . . . . . . . . .  5
     6.1.  Normative References . . . . . . . . . . . . . . . . . . .  5
     6.2.  Informative References . . . . . . . . . . . . . . . . . .  5
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . .  6

1.  Introduction

   The HKDF algorithm [RFC5869] is a key derivation function based on
   the Hashed Message Authentication Code (HMAC).  This document assigns
   algorithm identifiers to the HKDF algorithm when used with three
   common one-way hash functions.  These algorithm identifiers are
   needed to make use of the HKDF in some security protocols, such as
   the The Cryptographic Message Syntax (CMS) [RFC5652].

1.1.  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.

1.2.  ASN.1

   In this specification, values are generated using ASN.1 [X.680] using
   the Basic Encoding Rules (BER) and the Distinguished Encoding Rules
   (DER) [X.690].

2.  HKDF Algorithm Identifiers

   This section assigns algorithm identifier to HKDF [RFC5869] used with
   three common one-way hash functions that are specified in [SHS],
   SHA-256, SHA-384, and SHA-512.  When any of these three object
   identifiers appears within the ASN.1 type AlgorithmIdentifier, the
   parameters component of that type SHALL be absent.

   The specification of AlgorithmIdentifier is available in [RFC5911],
   which is an evolution from the original definition in X.509
   [X.509-88].

Housley                                                         [Page 2]
INTERNET-DRAFT                 HKDF OIDs                   February 2019

   The assigned object identifiers are:

   id-alg-hkdf-with-sha256 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
       us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) alg(3) TBD1 }

   id-alg-hkdf-with-sha384 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
       us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) alg(3) TBD2 }

   id-alg-hkdf-with-sha512 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
       us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) alg(3) TBD3 }
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