Elliptic Curve Cryptography (ECC) Cipher Suites for Transport Layer Security (TLS) Versions 1.2 and Earlier
draft-ietf-tls-rfc4492bis-08

Document Type Active Internet-Draft (tls WG)
Last updated 2016-07-08
Replaces draft-nir-tls-rfc4492bis
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TLS Working Group                                                 Y. Nir
Internet-Draft                                               Check Point
Obsoletes: 4492 (if approved)                               S. Josefsson
Intended status: Standards Track                                  SJD AB
Expires: January 9, 2017                             M. Pegourie-Gonnard
                                                  Independent / PolarSSL
                                                            July 8, 2016

  Elliptic Curve Cryptography (ECC) Cipher Suites for Transport Layer
                Security (TLS) Versions 1.2 and Earlier
                      draft-ietf-tls-rfc4492bis-08

Abstract

   This document describes key exchange algorithms based on Elliptic
   Curve Cryptography (ECC) for the Transport Layer Security (TLS)
   protocol.  In particular, it specifies the use of Ephemeral Elliptic
   Curve Diffie-Hellman (ECDHE) key agreement in a TLS handshake and the
   use of Elliptic Curve Digital Signature Algorithm (ECDSA) and Edwards
   Digital Signature Algorithm (EdDSA) as new authentication mechanisms.

Status of This Memo

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   This Internet-Draft will expire on January 9, 2017.

Copyright Notice

   Copyright (c) 2016 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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Nir, et al.              Expires January 9, 2017                [Page 1]
Internet-Draft          ECC Cipher Suites for TLS              July 2016

   carefully, as they describe your rights and restrictions with respect
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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.  Conventions Used in This Document . . . . . . . . . . . .   4
   2.  Key Exchange Algorithm  . . . . . . . . . . . . . . . . . . .   4
     2.1.  ECDHE_ECDSA . . . . . . . . . . . . . . . . . . . . . . .   6
     2.2.  ECDHE_RSA . . . . . . . . . . . . . . . . . . . . . . . .   6
     2.3.  ECDH_anon . . . . . . . . . . . . . . . . . . . . . . . .   6
   3.  Client Authentication . . . . . . . . . . . . . . . . . . . .   7
     3.1.  ECDSA_sign  . . . . . . . . . . . . . . . . . . . . . . .   7
   4.  TLS Extensions for ECC  . . . . . . . . . . . . . . . . . . .   8
   5.  Data Structures and Computations  . . . . . . . . . . . . . .   8
     5.1.  Client Hello Extensions . . . . . . . . . . . . . . . . .   9
       5.1.1.  Supported Elliptic Curves Extension . . . . . . . . .  10
       5.1.2.  Supported Point Formats Extension . . . . . . . . . .  11
     5.2.  Server Hello Extension  . . . . . . . . . . . . . . . . .  12
     5.3.  Server Certificate  . . . . . . . . . . . . . . . . . . .  13
     5.4.  Server Key Exchange . . . . . . . . . . . . . . . . . . .  14
       5.4.1.  Uncompressed Point Format for NIST curves . . . . . .  17
     5.5.  Certificate Request . . . . . . . . . . . . . . . . . . .  18
     5.6.  Client Certificate  . . . . . . . . . . . . . . . . . . .  19
     5.7.  Client Key Exchange . . . . . . . . . . . . . . . . . . .  20
     5.8.  Certificate Verify  . . . . . . . . . . . . . . . . . . .  21
     5.9.  Elliptic Curve Certificates . . . . . . . . . . . . . . .  23
     5.10. ECDH, ECDSA, and RSA Computations . . . . . . . . . . . .  23
     5.11. Public Key Validation . . . . . . . . . . . . . . . . . .  24
   6.  Cipher Suites . . . . . . . . . . . . . . . . . . . . . . . .  25
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  26
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  27
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  27
   10. Version History for This Draft  . . . . . . . . . . . . . . .  28
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  28
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