ShangMi (SM) Cipher Suites for Transport Layer Security (TLS) Protocol Version 1.3
draft-yang-tls-tls13-sm-suites-02

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TLS                                                              P. Yang
Internet-Draft                                             Ant Financial
Intended status: Informational                         November 26, 2019
Expires: May 29, 2020

 ShangMi (SM) Cipher Suites for Transport Layer Security (TLS) Protocol
                              Version 1.3
                   draft-yang-tls-tls13-sm-suites-02

Abstract

   This document specifies a set of cipher suites for the Transport
   Layer Security (TLS) protocol version 1.3 to support ShangMi (SM)
   cryptographic algorithms.

   The use of these cipher suites with TLSv1.3 is not endorsed by the
   IETF.  The SM cipher suites are becoming mandatory in China, and so
   this document provides a description of how to use the SM cipher
   suites with TLSv1.3 so that implementers can produce interworking
   implementations.

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 May 29, 2020.

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
   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

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Internet-Draft          TLSv1.3 SM Cipher Suites           November 2019

   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
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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  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  The SM Algorithms . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Supported Cipher Suites . . . . . . . . . . . . . . . . . . .   4
   3.  Cipher Suites Definitions . . . . . . . . . . . . . . . . . .   4
     3.1.  TLS Versions  . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Authentication  . . . . . . . . . . . . . . . . . . . . .   4
       3.2.1.  SM2 Signature Scheme  . . . . . . . . . . . . . . . .   4
     3.3.  Key Exchange  . . . . . . . . . . . . . . . . . . . . . .   6
       3.3.1.  Hello Messages  . . . . . . . . . . . . . . . . . . .   6
       3.3.2.  CertificateRequest  . . . . . . . . . . . . . . . . .   7
       3.3.3.  Certificate . . . . . . . . . . . . . . . . . . . . .   7
       3.3.4.  CertificateVerify . . . . . . . . . . . . . . . . . .   7
     3.4.  Key Scheduling  . . . . . . . . . . . . . . . . . . . . .   7
     3.5.  Cipher  . . . . . . . . . . . . . . . . . . . . . . . . .   8
       3.5.1.  AEAD_SM4_GCM  . . . . . . . . . . . . . . . . . . . .   8
       3.5.2.  AEAD_SM4_CCM  . . . . . . . . . . . . . . . . . . . .   9
     3.6.  Hash  . . . . . . . . . . . . . . . . . . . . . . . . . .  10
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
     6.2.  Informative References  . . . . . . . . . . . . . . . . .  12
   Appendix A.  Test Vectors . . . . . . . . . . . . . . . . . . . .  13
     A.1.  SM4-GCM Test Vectors  . . . . . . . . . . . . . . . . . .  13
     A.2.  SM4-CCM Test Vectors  . . . . . . . . . . . . . . . . . .  13
   Appendix B.  Contributors . . . . . . . . . . . . . . . . . . . .  13
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   This document describes two new cipher suites for the Transport Layer
   Security (TLS) protocol version 1.3 (TLSv1.3, [RFC8446]).  The new
   cipher suites are as follows (see also Section 2):

      CipherSuite TLS_SM4_GCM_SM3 = { 0x00, 0xC6 };
      CipherSuite TLS_SM4_CCM_SM3 = { 0x00, 0xC7 };

   These new cipher suites contain several ShangMi (SM) cryptographic
   algorithms that provide both authentication and confidentiality.  For

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