LDP Hello Cryptographic Authentication
draft-ietf-mpls-ldp-hello-crypto-auth-03

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Document Type Active Internet-Draft (mpls WG)
Last updated 2014-03-19
Replaces draft-zheng-mpls-ldp-hello-crypto-auth
Stream IETF
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Revised I-D Needed - Issue raised by WGLC
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Network Working Group                                           L. Zheng
Internet-Draft                                                   M. Chen
Intended status: Standards Track                     Huawei Technologies
Expires: September 20, 2014                                    M. Bhatia
                                                          Alcatel-Lucent
                                                          March 19, 2014

                 LDP Hello Cryptographic Authentication
              draft-ietf-mpls-ldp-hello-crypto-auth-03.txt

Abstract

   This document introduces a new optional Cryptographic Authentication
   TLV that LDP can use to secure its Hello messages.  It secures the
   Hello messages against spoofing attacks and some well known attacks
   against the IP header.  This document describes a mechanism to secure
   the LDP Hello messages using National Institute of Standards and
   Technology (NIST) Secure Hash Standard family of algorithms.

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Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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 http://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 September 20, 2014.

Copyright Notice

   Copyright (c) 2014 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
   (http://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.

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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4

   2.  Cryptographic Authentication TLV . . . . . . . . . . . . . . .  6
     2.1.  Optional Parameter for Hello Message . . . . . . . . . . .  6
     2.2.  LDP Security Association . . . . . . . . . . . . . . . . .  6
     2.3.  Cryptographic Authentication TLV Encoding  . . . . . . . .  8
     2.4.  Sequence Number Wrap . . . . . . . . . . . . . . . . . . .  9

   3.  Cryptographic Authentication Procedure . . . . . . . . . . . . 10

   4.  Cross Protocol Attack Mitigation . . . . . . . . . . . . . . . 11

   5.  Cryptographic Aspects  . . . . . . . . . . . . . . . . . . . . 12
     5.1.  Preparing the Cryptographic Key  . . . . . . . . . . . . . 12
     5.2.  Computing the Hash . . . . . . . . . . . . . . . . . . . . 13
     5.3.  Result . . . . . . . . . . . . . . . . . . . . . . . . . . 13

   6.  Processing Hello Message Using Cryptographic Authentication  . 14
     6.1.  Transmission Using Cryptographic Authentication  . . . . . 14
     6.2.  Receipt Using Cryptographic Authentication . . . . . . . . 14

   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 16

   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 17

   9.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 18

   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 19
     10.1. Normative References . . . . . . . . . . . . . . . . . . . 19
     10.2. Informative References . . . . . . . . . . . . . . . . . . 19

   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 21

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1.  Introduction

   The Label Distribution Protocol (LDP) [RFC5036] sets up LDP sessions
   that run between LDP peers.  The peers could either be directly
   connected at the link level or could be multiple hops away.  An LDP
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