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Intermediate System to Intermediate System (IS-IS) Cryptographic Authentication (RFC3567)

IP.com Disclosure Number: IPCOM000016842D
Original Publication Date: 2003-Jul-01
Included in the Prior Art Database: 2003-Jul-18
Document File: 7 page(s) / 13K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

T. Li: AUTHOR [+2]

Abstract

This document describes the authentication of Intermediate System to Intermediate System (IS-IS) Protocol Data Units (PDUs) using the Hashed Message Authentication Codes - Message Digest 5 (HMAC-MD5) algorithm as found in RFC 2104. IS-IS is specified in International Standards Organization (ISO) 10589, with extensions to support Internet Protocol version 4 (IPv4) described in RFC 1195. The base specification includes an authentication mechanism that allows for multiple authentication algorithms. The base specification only specifies the algorithm for cleartext passwords.

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Network Working Group                                              T. Li

Request for Comments: 3567                              Procket Networks

Category: Informational                                      R. Atkinson

                                                        Extreme Networks

                                                               July 2003

          Intermediate System to Intermediate System (IS-IS)

                      Cryptographic Authentication

Status of this Memo

   This memo provides information for the Internet community.  It does

   not specify an Internet standard of any kind.  Distribution of this

   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2003).  All Rights Reserved.

Abstract

   This document describes the authentication of Intermediate System to

   Intermediate System (IS-IS) Protocol Data Units (PDUs) using the

   Hashed Message Authentication Codes - Message Digest 5 (HMAC-MD5)

   algorithm as found in RFC 2104.  IS-IS is specified in International

   Standards Organization (ISO) 10589, with extensions to support

   Internet Protocol version 4 (IPv4) described in RFC 1195.  The base

   specification includes an authentication mechanism that allows for

   multiple authentication algorithms.  The base specification only

   specifies the algorithm for cleartext passwords.

   This document proposes an extension to that specification that allows

   the use of the HMAC-MD5 authentication algorithm to be used in

   conjunction with the existing authentication mechanisms.

1. Introduction

   The IS-IS protocol, as specified in ISO 10589 [1], provides for the

   authentication of Link State PDUs (LSPs) through the inclusion of

   authentication information as part of the LSP.  This authentication

   information is encoded as a Type-Length-Value (TLV) tuple.  The use

   of IS-IS for IPv4 networks is described in [3].

   The type of the TLV is specified as 10.  The length of the TLV is

   variable.  The value of the TLV depends on the authentication

   algorithm and related secrets being used.  The first octet of the

   value is used to specify the authentication type.  Type 0 is

Li & Atkinson                Informational                      [Page 1]

RFC 3567           IS-IS Cryptographic Authentication          July 2003

   reserved, type 1 indicates a cleartext password, and type 255 is used

   for routing domain private authentication methods.  The remainder of

   the TLV value is known as the Authentication Value.

   This document extends the above situation by allocating a new

   authentication type for HMAC-MD5 and specifying the algorithms for

   t...