HIP Diet EXchange (DEX)
draft-ietf-hip-dex-09

Document Type Active Internet-Draft (hip WG)
Last updated 2019-09-25
Replaces draft-moskowitz-hip-dex
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HIP WG                                                 R. Moskowitz, Ed.
Internet-Draft                                            HTT Consulting
Intended status: Standards Track                               R. Hummen
Expires: March 28, 2020                Hirschmann Automation and Control
                                                                 M. Komu
                                                                Ericsson
                                                      September 25, 2019

                        HIP Diet EXchange (DEX)
                         draft-ietf-hip-dex-09

Abstract

   This document specifies the Host Identity Protocol Diet EXchange (HIP
   DEX), a variant of the Host Identity Protocol Version 2 (HIPv2).  The
   HIP DEX protocol design aims at reducing the overhead of the employed
   cryptographic primitives by omitting public-key signatures and hash
   functions.

   The HIP DEX protocol is primarily designed for computation or memory-
   constrained sensor/actuator devices.  Like HIPv2, it is expected to
   be used together with a suitable security protocol such as the
   Encapsulated Security Payload (ESP) for the protection of upper layer
   protocol data.  In addition, HIP DEX can also be used as a keying
   mechanism for security primitives at the MAC layer, e.g., for IEEE
   802.15.4 networks.

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
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   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 March 28, 2020.

Moskowitz, et al.        Expires March 28, 2020                 [Page 1]
Internet-Draft           HIP Diet EXchange (DEX)          September 2019

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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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  The HIP Diet EXchange (DEX) . . . . . . . . . . . . . . .   5
     1.2.  Memo Structure  . . . . . . . . . . . . . . . . . . . . .   6
   2.  Terms, Notation and Definitions . . . . . . . . . . . . . . .   6
     2.1.  Requirements Terminology  . . . . . . . . . . . . . . . .   6
     2.2.  Notation  . . . . . . . . . . . . . . . . . . . . . . . .   6
     2.3.  Definitions . . . . . . . . . . . . . . . . . . . . . . .   7
   3.  Host Identity (HI) and its Structure  . . . . . . . . . . . .   8
     3.1.  Host Identity Tag (HIT) . . . . . . . . . . . . . . . . .   9
     3.2.  Generating a HIT from an HI . . . . . . . . . . . . . . .   9
   4.  Protocol Overview . . . . . . . . . . . . . . . . . . . . . .   9
     4.1.  Creating a HIP Association  . . . . . . . . . . . . . . .  10
       4.1.1.  HIP Puzzle Mechanism  . . . . . . . . . . . . . . . .  11
       4.1.2.  HIP State Machine . . . . . . . . . . . . . . . . . .  12
       4.1.3.  HIP DEX Security Associations . . . . . . . . . . . .  16
       4.1.4.  User Data Considerations  . . . . . . . . . . . . . .  17
   5.  Packet Formats  . . . . . . . . . . . . . . . . . . . . . . .  17
     5.1.  Payload Format  . . . . . . . . . . . . . . . . . . . . .  17
     5.2.  HIP Parameters  . . . . . . . . . . . . . . . . . . . . .  17
       5.2.1.  DH_GROUP_LIST . . . . . . . . . . . . . . . . . . . .  18
       5.2.2.  HIP_CIPHER  . . . . . . . . . . . . . . . . . . . . .  18
       5.2.3.  HOST_ID . . . . . . . . . . . . . . . . . . . . . . .  19
       5.2.4.  HIT_SUITE_LIST  . . . . . . . . . . . . . . . . . . .  19
       5.2.5.  ENCRYPTED_KEY . . . . . . . . . . . . . . . . . . . .  20
     5.3.  HIP Packets . . . . . . . . . . . . . . . . . . . . . . .  20
       5.3.1.  I1 - the HIP Initiator Packet . . . . . . . . . . . .  21
       5.3.2.  R1 - the HIP Responder Packet . . . . . . . . . . . .  22
       5.3.3.  I2 - the Second HIP Initiator Packet  . . . . . . . .  24
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