Babel Routing Protocol over Datagram Transport Layer Security
draft-ietf-babel-dtls-00

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Last updated 2018-08-15
Replaces draft-decimo-babel-dtls
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Network Working Group                                          A. Decimo
Internet-Draft                         IRIF, University of Paris-Diderot
Updates: 6126bis (if approved)                               D. Schinazi
Intended status: Standards Track                              Apple Inc.
Expires: February 16, 2019                                 J. Chroboczek
                                       IRIF, University of Paris-Diderot
                                                         August 15, 2018

     Babel Routing Protocol over Datagram Transport Layer Security
                        draft-ietf-babel-dtls-00

Abstract

   This documents describes how to use Datagram Transport Layer Security
   (DTLS) to secure the Babel Routing Protocol.

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
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   This Internet-Draft will expire on February 16, 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Specification of Requirements . . . . . . . . . . . . . .   3
   2.  Operation of the Protocol . . . . . . . . . . . . . . . . . .   3
   3.  Handling protected and unprotected data . . . . . . . . . . .   3
     3.1.  Cleartext and DTLS on the same port . . . . . . . . . . .   3
     3.2.  Cleartext and DTLS on separate ports  . . . . . . . . . .   4
   4.  Establishing and handling Babel over DTLS sessions  . . . . .   4
     4.1.  Session Initiation  . . . . . . . . . . . . . . . . . . .   4
     4.2.  Transmission  . . . . . . . . . . . . . . . . . . . . . .   4
     4.3.  Reception . . . . . . . . . . . . . . . . . . . . . . . .   5
     4.4.  Neighbour flush . . . . . . . . . . . . . . . . . . . . .   5
   5.  Interface MTU Issues  . . . . . . . . . . . . . . . . . . . .   5
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Appendix A.  Performance Considerations . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   Babel over DTLS is a security protocol for the Babel routing protocol
   [RFC6126bis], that uses Datagram Transport Layer Security (DTLS)
   [RFC6347].  This document describes how to protect Babel with Babel
   over DTLS.

   The motivation for proposing Babel over DTLS is that DTLS provides a
   sub-layer of security that is well-defined, whose security has been
   shown, and that has multiple implementations.  Babel over DTLS has
   the following properties, inherited from DTLS:

   o  authentication of peers;

   o  integrity of data;

   o  confidentiality of data;

   o  use of asymmetric keys.

   The main change to the Babel protocol is that Babel over DTLS
   requires most packets to be sent over unicast.

   A malicious entity in range of a non-secured deployment of Babel can
   learn properties of the network, but also reroute legitimate traffic
   by advertising routes with a low metric.

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1.1.  Specification of Requirements

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
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