Re: [OSPF] Revised OSPF HMAC SHA Authentication Draft

Vishwas Manral, et al,

	RFC 2328 specificly specifies "message digest" in section D3.

	I am not expert in this field, but wouldn't a section
	why Type 2 shouldn't then be reserved for MD5?

	It should ALSO be a simple argument that any type 2 before now
	 was using MD5. Thus it is a defacto standard for the type.

	And then and a aditional type by allocated for HMAC-SHA auth.

	Mitchell Erblich
	----------------

Vishwas Manral wrote:
> 
> Hi,
> 
> We have updated the OSPF HMAC-SHA authentication draft with the comments
> that we received on the list and offline.
> 
> The updated version has a short section which discusses backwards
> compatibility, similarities and differences from using MD5 (which is
> explained in Section 5 of 2328), etc.
> 
> http://www.ietf.org/internet-drafts/draft-bhatia-manral-white-ospf-hmac-sha-
> 02.txt
> 
> Please let us know if there are further modifications desired.
> 
> Cheers,
> Manav, Vishwas, et al.
> 
> ----- Original Message -----
> From: <Internet-Drafts@ietf.org>
> To: <i-d-announce@ietf.org>
> Sent: Friday, August 18, 2006 1:20 AM
> Subject: I-D ACTION:draft-bhatia-manral-white-ospf-hmac-sha-02.txt
> 
> > >A New Internet-Draft is available from the on-line Internet-Drafts
> > > directories.
> > >
> > >
> > > Title : OSPF HMAC Cryptographic Authentication
> > > Author(s) : M. Bhatia, et al.
> > > Filename : draft-bhatia-manral-white-ospf-hmac-sha-02.txt
> > > Pages : 11
> > > Date : 2006-8-17
> > >
> > > This document describes a mechanism for authenticating OSPF packets
> > >   by making use of the HMAC algorithm in conjunction with the SHA
> > >   family of cryptographic hash functions. Because of the way the hash
> > >   functions are used in HMAC construction, the collision attacks
> > >   currently known against SHA-1 do not apply.
> > >
> > >   This will be done in addition to the already documented
> > >   authentication schemes described in the base specification.
> > >
> > > A URL for this Internet-Draft is:
> > >
> http://www.ietf.org/internet-drafts/draft-bhatia-manral-white-ospf-hmac-sha-
> 02.txt
> > >
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> 
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