Re: [kitten] I-D Action: draft-ietf-kitten-pkinit-alg-agility-07.txt
Benjamin Kaduk <kaduk@mit.edu> Fri, 19 April 2019 03:27 UTC
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Date: Thu, 18 Apr 2019 22:27:16 -0500
From: Benjamin Kaduk <kaduk@mit.edu>
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Subject: Re: [kitten] I-D Action: draft-ietf-kitten-pkinit-alg-agility-07.txt
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Thanks for the updates, Greg -- they really help the document out! (Thanks to Eric for spotting the needed changes.) Before I push this off for publication, I just wanted to check whether KDC policy had a role in providing downgrade protection in the discovery methods from Sections 4 and 5 -- would there be a case where the KDC knows to require the stronger CMS type/signing algorithm for a specific principal, so that even if the client is tricked into downgrade by an attacker, the exchange would still fail? Thanks, Ben On Thu, Apr 18, 2019 at 12:05:04PM -0700, internet-drafts@ietf.org wrote: > > A New Internet-Draft is available from the on-line Internet-Drafts directories. > This draft is a work item of the Common Authentication Technology Next Generation WG of the IETF. > > Title : PKINIT Algorithm Agility > Authors : Love Hornquist Astrand > Larry Zhu > Margaret Wasserman > Greg Hudson > Filename : draft-ietf-kitten-pkinit-alg-agility-07.txt > Pages : 20 > Date : 2019-04-18 > > Abstract: > This document updates the Public Key Cryptography for Initial > Authentication in Kerberos standard (PKINIT) [RFC4556], to remove > protocol structures tied to specific cryptographic algorithms. The > PKINIT key derivation function is made negotiable, and the digest > algorithms for signing the pre-authentication data and the client's > X.509 certificates are made discoverable. > > These changes provide preemptive protection against vulnerabilities > discovered in the future against any specific cryptographic > algorithm, and allow incremental deployment of newer algorithms. > > > The IETF datatracker status page for this draft is: > https://datatracker.ietf.org/doc/draft-ietf-kitten-pkinit-alg-agility/ > > There are also htmlized versions available at: > https://tools.ietf.org/html/draft-ietf-kitten-pkinit-alg-agility-07 > https://datatracker.ietf.org/doc/html/draft-ietf-kitten-pkinit-alg-agility-07 > > A diff from the previous version is available at: > https://www.ietf.org/rfcdiff?url2=draft-ietf-kitten-pkinit-alg-agility-07 > > > Please note that it may take a couple of minutes from the time of submission > until the htmlized version and diff are available at tools.ietf.org. > > Internet-Drafts are also available by anonymous FTP at: > ftp://ftp.ietf.org/internet-drafts/ > > _______________________________________________ > Kitten mailing list > Kitten@ietf.org > https://www.ietf.org/mailman/listinfo/kitten
- [kitten] I-D Action: draft-ietf-kitten-pkinit-alg… internet-drafts
- Re: [kitten] I-D Action: draft-ietf-kitten-pkinit… Benjamin Kaduk
- Re: [kitten] I-D Action: draft-ietf-kitten-pkinit… Greg Hudson