Using Raw Public Keys in Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS)
draft-ietf-tls-oob-pubkey-10

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Document Type Active Internet-Draft (tls WG)
Last updated 2013-11-21 (latest revision 2013-10-19)
Replaces draft-wouters-tls-oob-pubkey
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TLS                                                      P. Wouters, Ed.
Internet-Draft                                                   Red Hat
Intended status: Standards Track                      H. Tschofenig, Ed.
Expires: April 22, 2014                     Nokia Solutions and Networks
                                                              J. Gilmore

                                                               S. Weiler
                                                            SPARTA, Inc.
                                                              T. Kivinen
                                                               AuthenTec
                                                        October 19, 2013

  Using Raw Public Keys in Transport Layer Security (TLS) and Datagram
                    Transport Layer Security (DTLS)
                    draft-ietf-tls-oob-pubkey-10.txt

Abstract

   This document specifies a new certificate type and two TLS extensions
   for exchanging raw public keys in Transport Layer Security (TLS) and
   Datagram Transport Layer Security (DTLS) for use with out-of-band
   public key validation.

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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   This Internet-Draft will expire on April 22, 2014.

Copyright Notice

   Copyright (c) 2013 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

Wouters, et al.          Expires April 22, 2014                 [Page 1]
Internet-Draft      Using Raw Public Keys in TLS/DTLS       October 2013

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Structure of the Raw Public Key Extension . . . . . . . . . .   4
   4.  TLS Client and Server Handshake Behavior  . . . . . . . . . .   6
     4.1.  Client Hello  . . . . . . . . . . . . . . . . . . . . . .   7
     4.2.  Server Hello  . . . . . . . . . . . . . . . . . . . . . .   7
     4.3.  Client Authentication . . . . . . . . . . . . . . . . . .   8
   5.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  TLS Server uses Raw Public Key  . . . . . . . . . . . . .   8
     5.2.  TLS Client and Server use Raw Public Keys . . . . . . . .   9
     5.3.  Combined Usage of Raw Public Keys and X.509 Certificate .  10
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  13
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  14
   Appendix A.  Example Encoding . . . . . . . . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Introduction

   Traditionally, TLS client and server public keys are obtained in PKIX
   containers in-band as part of the TLS handshake procedure and are
   validated using trust anchors based on a PKIX certification authority
   (CA) [RFC5280].  This method can add a complicated trust relationship
   that is difficult to validate.  Examples of such complexity can be
   seen in [Defeating-SSL].

   Alternative methods are available that allow a TLS clients/servers to
   obtain the TLS servers/client public key:

   o  TLS clients can obtain the TLS server public key from a DNSSEC
      secured resource records using DANE [RFC6698].

   o  The TLS client or server public key is obtained from a certificate
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