S/MIME Capabilities for Public Key Definitions
draft-ietf-pkix-pubkey-caps-06

The information below is for an old version of the document
Document Type Active Internet-Draft (pkix WG)
Last updated 2012-05-04 (latest revision 2012-04-30)
Stream IETF
Intended RFC status Informational
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IESG IESG state IESG Evaluation::Revised I-D Needed
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Needs a YES.
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IESG note Document Shepherd: Stephen Kent (kent@bbn.com)
Send notices to pkix-chairs@tools.ietf.org, draft-ietf-pkix-pubkey-caps@tools.ietf.org
Network Working Group                                          J. Schaad
Internet-Draft                                   Soaring Hawk Consulting
Intended status: Informational                            April 29, 2012
Expires: October 31, 2012

             S/MIME Capabilities for Public Key Definitions
                     draft-ietf-pkix-pubkey-caps-06

Abstract

   This document defines a set of Secure/Multipurpose Internet Mail
   Extensions (S/MIME) Capability types for ASN.1 encoding for the
   current set of public keys defined by the PKIX working group.  This
   facilitates the ability for a requester to specify information on the
   public keys and signature algorithms to be used in responses.  An
   example of where this is used is is detailed in Online Certificate
   Status Protocol Algorithm Agility (RFC 6277).

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 October 31, 2012.

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   Copyright (c) 2012 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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   include Simplified BSD License text as described in Section 4.e of

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

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  ASN.1 Notation . . . . . . . . . . . . . . . . . . . . . .  3
     1.2.  Requirements Terminology . . . . . . . . . . . . . . . . .  4
   2.  RSA Public Keys  . . . . . . . . . . . . . . . . . . . . . . .  5
     2.1.  Generic RSA Public Keys  . . . . . . . . . . . . . . . . .  5
     2.2.  RSASSA-PSS Signature Public Keys . . . . . . . . . . . . .  6
     2.3.  RSAES-OAEP Key Transport Public Keys . . . . . . . . . . .  6
   3.  Diffie-Hellman Keys  . . . . . . . . . . . . . . . . . . . . .  8
     3.1.  DSA Signature Public Key . . . . . . . . . . . . . . . . .  8
     3.2.  DH Key Agreement Keys  . . . . . . . . . . . . . . . . . .  9
   4.  Elliptical Curve Keys  . . . . . . . . . . . . . . . . . . . . 10
     4.1.  Generic Elliptical Curve Keys  . . . . . . . . . . . . . . 10
     4.2.  Elliptical Curve DH Keys . . . . . . . . . . . . . . . . . 11
     4.3.  Elliptical Curve MQV Keys  . . . . . . . . . . . . . . . . 11
   5.  RSASSA-PSS Signature Algorithm Capability  . . . . . . . . . . 12
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 14
   7.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 16
   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 17
     8.1.  Normative References . . . . . . . . . . . . . . . . . . . 17
     8.2.  Informative References . . . . . . . . . . . . . . . . . . 17
   Appendix A.  2008 ASN.1 Module . . . . . . . . . . . . . . . . . . 18
   Appendix B.  1988 ASN.1 Module . . . . . . . . . . . . . . . . . . 22
   Appendix C.  Future Work . . . . . . . . . . . . . . . . . . . . . 24
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 25

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1.  Introduction

   In the process of dealing with the Online Certificate Status Protocol
   (OCSP) agility issues in [RFC6277] it was noted that we really wanted
   to describe information to be used in selecting a public key, but we
   did not have any way of doing so.  This document fills that hole by
   defining a set of Secure/Multipurpose Internet Mail Extensions
   (S/MIME) Capability types for a small set of public key
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