IS-IS Cryptographic Authentication
RFC 5304
| Document | Type |
RFC - Proposed Standard
(October 2008; No errata)
Obsoletes RFC 3567
Updates RFC 1195
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5304 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Ross Callon | ||
| Send notices to | (None) | ||
Network Working Group T. Li
Request for Comments: 5304 Redback Networks, Inc.
Obsoletes: 3567 R. Atkinson
Updates: 1195 Extreme Networks, Inc.
Category: Standards Track October 2008
IS-IS Cryptographic Authentication
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
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
replaces RFC 3567.
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.
Li & Atkinson Standards Track [Page 1]
RFC 5304 IS-IS Cryptographic Authentication October 2008
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Authentication Procedures . . . . . . . . . . . . . . . . . . . 3
2.1. Implementation Considerations . . . . . . . . . . . . . . . 5
3. Security Considerations . . . . . . . . . . . . . . . . . . . . 5
3.1. Security Limitations . . . . . . . . . . . . . . . . . . . 5
3.2. Assurance . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3. Key Configuration . . . . . . . . . . . . . . . . . . . . . 6
3.4. Other Considerations . . . . . . . . . . . . . . . . . . . 7
3.5. Future Directions . . . . . . . . . . . . . . . . . . . . . 7
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 7
5. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 8
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.1. Normative References . . . . . . . . . . . . . . . . . . . 8
6.2. Informative References . . . . . . . . . . . . . . . . . . 9
Li & Atkinson Standards Track [Page 2]
RFC 5304 IS-IS Cryptographic Authentication October 2008
1. Introduction
The IS-IS protocol, as specified in [ISO-10589], provides for the
authentication of Link State Protocol Data Units (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 [RFC1195].
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
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
the computation of the Authentication Value. This document also
describes modifications to the base protocol to ensure that the
authentication mechanisms described in this document are effective.
This document is a publication of the IS-IS Working Group within the
IETF. This document replaces [RFC3567], which is an Informational
RFC. This document is on the Standards Track. This document has
revised Section 3, with the significant addition of a discussion of
recent attacks on MD5 in Section 3.2. This document has also added a
substantive "IANA Considerations" section to create a missing
codepoint registry.
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
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