Using Commercial National Security Algorithm Suite Algorithms in Secure/Multipurpose Internet Mail Extensions
draft-jenkins-cnsa-smime-profile-03

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Last updated 2019-11-26
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Internet Engineering Task Force                               M. Jenkins
Internet-Draft                                                       NSA
Intended status: Informational                         November 26, 2019
Expires: May 29, 2020

Using Commercial National Security Algorithm Suite Algorithms in Secure/
                 Multipurpose Internet Mail Extensions
                  draft-jenkins-cnsa-smime-profile-03

Abstract

   The United States Government has published the NSA Commercial
   National Security Algorithm (CNSA) Suite, which defines cryptographic
   algorithm policy for national security applications.  This document
   specifies the conventions for using the United States National
   Security Agency's CNSA Suite algorithms in Secure/Multipurpose
   Internet Mail Extensions (S/MIME) as specified in RFC 8551.  It
   applies to the capabilities, configuration, and operation of all
   components of US National Security Systems that employ S/MIME
   messaging.  US National Security Systems are described in NIST
   Special Publication 800-59.  It is also appropriate for all other US
   Government systems that process high-value information.  It is made
   publicly available for use by developers and operators of these and
   any other system deployments.

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
   Task Force (IETF).  Note that other groups may also distribute
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 29, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Jenkins                   Expires May 29, 2020                  [Page 1]
Internet-Draft            CNSA Suite for S/MIME            November 2019

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  The Commercial National Security Algorithm Suite  . . . . . .   3
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Requirements and Assumptions  . . . . . . . . . . . . . . . .   4
   5.  SHA-384 Message Digest Algorithm  . . . . . . . . . . . . . .   5
   6.  Digital Signature . . . . . . . . . . . . . . . . . . . . . .   5
     6.1.  ECDSA Signature . . . . . . . . . . . . . . . . . . . . .   5
     6.2.  RSA Signature . . . . . . . . . . . . . . . . . . . . . .   6
   7.  Key Establishment . . . . . . . . . . . . . . . . . . . . . .   7
     7.1.  Elliptic Curve Key Agreement  . . . . . . . . . . . . . .   7
     7.2.  RSA Key Transport . . . . . . . . . . . . . . . . . . . .  11
   8.  Content Encryption  . . . . . . . . . . . . . . . . . . . . .  13
     8.1.  AES-GCM Content Encryption  . . . . . . . . . . . . . . .  13
     8.2.  AES-CBC Content Encryption  . . . . . . . . . . . . . . .  14
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  15
     11.2.  Informative References . . . . . . . . . . . . . . . . .  18
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  19

1.  Introduction

   This document specifies the conventions for using the United States
   National Security Agency's Commercial National Security Algorithm
   (CNSA) Suite algorithms [CNSA] in Secure/Multipurpose Internet Mail
   Extensions (S/MIME) [RFC8551].  It applies to the capabilities,
   configuration, and operation of all components of US National
   Security Systems that employ S/MIME messaging.  US National Security
   Systems are described in NIST Special Publication 800-59 [SP80059].
   It is also appropriate for all other US Government systems that
   process high-value information.  It is made publicly available for
   use by developers and operators of these and any other system
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