Layer 3 Discovery and Liveness Signing
draft-ymbk-lsvr-l3dl-signing-00

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Network Working Group                                            R. Bush
Internet-Draft                                              Arrcus & IIJ
Intended status: Standards Track                              R. Austein
Expires: April 28, 2020                                           Arrcus
                                                        October 26, 2019

                 Layer 3 Discovery and Liveness Signing
                    draft-ymbk-lsvr-l3dl-signing-00

Abstract

   The Layer 3 Discovery and Liveness protocol OPEN PDU may contain a
   key and a certificate, which can be used to verify signatures on
   subsequent PDUs.  This document describes two mechanisms based on
   digital signatures, one that is Trust On First Use (TOFU), and one
   that uses certificates to provide authentication as well as session
   integrity.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

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 April 28, 2020.

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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
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Trust On First Use Method . . . . . . . . . . . . . . . . . .   3
     2.1.  Signing a PDU . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Verifying the OPEN PDU  . . . . . . . . . . . . . . . . .   4
     2.3.  Verifying Other PDUs  . . . . . . . . . . . . . . . . . .   4
   3.  Public Key Infrastructure Method  . . . . . . . . . . . . . .   5
     3.1.  Signing OPEN PDU with PKI . . . . . . . . . . . . . . . .   5
     3.2.  Verifying OPEN PDU with PKI . . . . . . . . . . . . . . .   5
   4.  Local Policy  . . . . . . . . . . . . . . . . . . . . . . . .   6
   5.  NEWKEY, Key Roll  . . . . . . . . . . . . . . . . . . . . . .   6
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   8
   9.  Normative References  . . . . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   This draft is being published without incorporating changes from an
   excellent security review.  This is being done so a couple of other
   drafts can reference it.  While all comments will, of course, be
   appreciated, readers may want to wait for the -01 version.

   The Layer 3 Discovery and Liveness protocol [old ref because new
   draft not yet pushed] [I-D.ietf-lsvr-l3dl] OPEN PDU contains an
   algorithm specifier, a key, and a certificate, which can be used to
   verify signatures on subsequent PDUs.  This document describes two
   methods of key generation and signing for use by L3DL, Trust On First
   Use (TOFU) and a PKI-based mechanism to provide authentication as
   well as session integrity.

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   The Key in the OPEN PDU SHOULD be the public key of an asymmetric key
   pair.  The sender signs with the private key, of course.  The device
   sending the OPEN may use one key for all links, a different key for
   each link, or some aggregation(s) thereof.