The Transport Layer Security (TLS) Protocol Version 1.3
draft-ietf-tls-rfc8446bis-00

Document Type Active Internet-Draft (tls WG)
Author Eric Rescorla 
Last updated 2020-10-05
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Network Working Group                                        E. Rescorla
Internet-Draft                                                   Mozilla
Obsoletes: 5077, 5246, 6961, 8446 (if approved)           5 October 2020
Updates: 4492, 5705, 6066 (if approved)                                 
Intended status: Standards Track                                        
Expires: 8 April 2021

        The Transport Layer Security (TLS) Protocol Version 1.3
                      draft-ietf-tls-rfc8446bis-00

Abstract

   This document specifies version 1.3 of the Transport Layer Security
   (TLS) protocol.  TLS allows client/server applications to communicate
   over the Internet in a way that is designed to prevent eavesdropping,
   tampering, and message forgery.

   This document updates RFCs 5705 and 6066 and obsoletes RFCs 5077,
   5246, and 6961.  This document also specifies new requirements for
   TLS 1.2 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 8 April 2021.

Copyright Notice

   Copyright (c) 2020 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 carefully, as they describe your rights

Rescorla                  Expires 8 April 2021                  [Page 1]
Internet-Draft                     TLS                      October 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   5
     1.1.  Conventions and Terminology . . . . . . . . . . . . . . .   6
     1.2.  Relationship to RFC 8446  . . . . . . . . . . . . . . . .   7
     1.3.  Major Differences from TLS 1.2  . . . . . . . . . . . . .   7
     1.4.  Updates Affecting TLS 1.2 . . . . . . . . . . . . . . . .   8
   2.  Protocol Overview . . . . . . . . . . . . . . . . . . . . . .   9
     2.1.  Incorrect DHE Share . . . . . . . . . . . . . . . . . . .  12
     2.2.  Resumption and Pre-Shared Key (PSK) . . . . . . . . . . .  13
     2.3.  0-RTT Data  . . . . . . . . . . . . . . . . . . . . . . .  15
   3.  Presentation Language . . . . . . . . . . . . . . . . . . . .  17
     3.1.  Basic Block Size  . . . . . . . . . . . . . . . . . . . .  17
     3.2.  Miscellaneous . . . . . . . . . . . . . . . . . . . . . .  17
     3.3.  Numbers . . . . . . . . . . . . . . . . . . . . . . . . .  18
     3.4.  Vectors . . . . . . . . . . . . . . . . . . . . . . . . .  18
     3.5.  Enumerateds . . . . . . . . . . . . . . . . . . . . . . .  19
     3.6.  Constructed Types . . . . . . . . . . . . . . . . . . . .  20
     3.7.  Constants . . . . . . . . . . . . . . . . . . . . . . . .  20
     3.8.  Variants  . . . . . . . . . . . . . . . . . . . . . . . .  21
   4.  Handshake Protocol  . . . . . . . . . . . . . . . . . . . . .  22
     4.1.  Key Exchange Messages . . . . . . . . . . . . . . . . . .  23
       4.1.1.  Cryptographic Negotiation . . . . . . . . . . . . . .  23
       4.1.2.  Client Hello  . . . . . . . . . . . . . . . . . . . .  24
       4.1.3.  Server Hello  . . . . . . . . . . . . . . . . . . . .  27
       4.1.4.  Hello Retry Request . . . . . . . . . . . . . . . . .  30
     4.2.  Extensions  . . . . . . . . . . . . . . . . . . . . . . .  31
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