Re: [dnsext] Clarifying the mandatory algorithm rules
Matthijs Mekking <matthijs@NLnetLabs.nl> Fri, 11 March 2011 08:31 UTC
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Subject: Re: [dnsext] Clarifying the mandatory algorithm rules
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, On November 30, Wouter acknowledges that changes need to be made to the Unbound implementation and asks for guidance: http://www.ietf.org/mail-archive/web/dnsext/current/msg10115.html Presenting two options: * One signature is enough (the lenient way) * Check the algorithms. But when checking the algorithms, thou should not use the DNSKEY RRset, but the DS RRset. I think the general consensus is that a validator should at least be able to check the algorithms in the DS RRset (Please correct me if I am being to hasty in my conclusion). There is still debate whether the validator SHOULD or MAY do this (Ed Lewis argued the term 'could', I think that translates to the RFC2119 term MAY). Proposed text would then be: "The validator SHOULD or MAY check (choice here) that the algorithms signaled in the DS-set work (but only for algorithms supported by the validator, of course)." Best regards, Matthijs On 03/10/2011 11:34 PM, Mark Andrews wrote: > > In message <alpine.BSF.2.00.1103100812260.60284@fledge.watson.org>, Samuel Weil > er writes: >> On Tue, 30 Nov 2010, W.C.A. Wijngaards wrote: >> >>> It is clear that checking the set of algorithms present in the DNSKEY >>> set is not a good idea, and checking the set of algorithms from the DS >>> set is the right, more lenient way to go. >> >> I apologize for checking out of this discussion last fall. >> >> I would like the WG's help understanding where you want to go with >> this topic. I don't fully understand the argument in favor of not >> checking the algorithms on the child side of the zone cut (= the ones >> in the DNSKEY RRset), nor am I sure that was the direction everyone >> seemed to want to go. Could someone summarize the current state of >> this? >> >> My own inclination is (still) to treat this as a clarification, saying >> that validators are not required to enforce these rules. (In other >> words, the extra checks Unbound did were just fine, though >> unnecessary. BIND's lenient approach was also fine.) Two specific >> pieces of proposed text can be found in the first message in this >> thread, dated 18 November 2010. > > While we think about this ISC has also had bug reports claiming > that is we don't publish DNSKEY prior to signing with them we are > break RFC 4035 because it allows verification of every RRSIG as a > policy and the only way to do that is to publish the DNSKEY prior > to use. > > If other RRSIG RRs also cover this RRset, the local resolver security > policy determines whether the resolver also has to test these RRSIG > RRs and how to resolve conflicts if these RRSIG RRs lead to differing > results. > >> -- Sam >> _______________________________________________ >> dnsext mailing list >> dnsext@ietf.org >> https://www.ietf.org/mailman/listinfo/dnsext -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJNed35AAoJEA8yVCPsQCW52EcIALwitOh1IOVX6AqV28GNEYYM VSSlPZyVWYxD0LCVTWq5aleh3EAJ3T4BdRio795mlNrc/vLi0VNL8FqRI8U7mYk8 I+acLNJGhoFpEFeVF+rOXpoZ3yfTerUctv1mmeyeO/2iW+PF++BJh67bcUV34h1p UvP3lMZCBqIpbR3uhRITjF5JsZ2yaqwoARMyIw58MM72M2Y0X3IuJCYSKSl3ANzJ nwBdrtZZcRmfmzJAY8PvDO0/mcyws1iK4JtiMMyXPNAfgxyBEeyxIe8YUR1yrQgL tcxHaDyTsaPp1GnqAbqucYWdhr17QZ1b6SUmh9qyYW1leKXZSecFUp0tjdhCYQo= =qOVC -----END PGP SIGNATURE-----
- Re: [dnsext] Clarifying the mandatory algorithm r… Jeffrey A. Williams
- Re: [dnsext] Clarifying the mandatory algorithm r… Jeffrey A. Williams
- Re: [dnsext] Clarifying the mandatory algorithm r… Jeffrey A. Williams
- [dnsext] Clarifying the mandatory algorithm rules Samuel Weiler
- Re: [dnsext] Clarifying the mandatory algorithm r… Ondřej Surý
- Re: [dnsext] Clarifying the mandatory algorithm r… Ondřej Surý
- Re: [dnsext] Clarifying the mandatory algorithm r… Samuel Weiler
- Re: [dnsext] Clarifying the mandatory algorithm r… W.C.A. Wijngaards
- Re: [dnsext] Clarifying the mandatory algorithm r… W.C.A. Wijngaards
- Re: [dnsext] Clarifying the mandatory algorithm r… Phillip Hallam-Baker
- Re: [dnsext] Clarifying the mandatory algorithm r… Florian Weimer
- Re: [dnsext] Clarifying the mandatory algorithm r… Jelte Jansen
- Re: [dnsext] Clarifying the mandatory algorithm r… Samuel Weiler
- Re: [dnsext] Clarifying the mandatory algorithm r… Brian Dickson
- Re: [dnsext] Clarifying the mandatory algorithm r… Samuel Weiler
- Re: [dnsext] Clarifying the mandatory algorithm r… Samuel Weiler
- Re: [dnsext] Clarifying the mandatory algorithm r… Ondřej Surý
- Re: [dnsext] Clarifying the mandatory algorithm r… Ondřej Surý
- Re: [dnsext] Clarifying the mandatory algorithm r… Ondřej Surý
- Re: [dnsext] Clarifying the mandatory algorithm r… Brian Dickson
- Re: [dnsext] Clarifying the mandatory algorithm r… Ondřej Surý
- Re: [dnsext] Clarifying the mandatory algorithm r… Mark Andrews
- Re: [dnsext] Clarifying the mandatory algorithm r… Brian Dickson
- Re: [dnsext] Clarifying the mandatory algorithm r… Mark Andrews
- Re: [dnsext] Clarifying the mandatory algorithm r… Ondřej Surý
- Re: [dnsext] Clarifying the mandatory algorithm r… George Barwood
- Re: [dnsext] Clarifying the mandatory algorithm r… Jelte Jansen
- Re: [dnsext] Clarifying the mandatory algorithm r… W.C.A. Wijngaards
- Re: [dnsext] Clarifying the mandatory algorithm r… Ondřej Surý
- Re: [dnsext] Clarifying the mandatory algorithm r… Mark Andrews
- Re: [dnsext] Clarifying the mandatory algorithm r… Mark Andrews
- Re: [dnsext] Clarifying the mandatory algorithm r… W.C.A. Wijngaards
- Re: [dnsext] Clarifying the mandatory algorithm r… Mark Andrews
- Re: [dnsext] Clarifying the mandatory algorithm r… Jelte Jansen
- Re: [dnsext] Clarifying the mandatory algorithm r… Doug Barton
- Re: [dnsext] Clarifying the mandatory algorithm r… Mark Andrews
- Re: [dnsext] Clarifying the mandatory algorithm r… Matthijs Mekking
- Re: [dnsext] Clarifying the mandatory algorithm r… Jelte Jansen
- Re: [dnsext] Clarifying the mandatory algorithm r… Mark Andrews
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Ondřej Surý
- Re: [dnsext] Clarifying the mandatory algorithm r… Paul Vixie
- Re: [dnsext] Clarifying the mandatory algorithm r… W.C.A. Wijngaards
- Re: [dnsext] Clarifying the mandatory algorithm r… Matthijs Mekking
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Phillip Hallam-Baker
- Re: [dnsext] Clarifying the mandatory algorithm r… Matthijs Mekking
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Brian Dickson
- Re: [dnsext] Clarifying the mandatory algorithm r… Matthijs Mekking
- Re: [dnsext] Clarifying the mandatory algorithm r… Olafur Gudmundsson
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Alfred Hönes
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Mark Andrews
- Re: [dnsext] Clarifying the mandatory algorithm r… Samuel Weiler
- Re: [dnsext] Clarifying the mandatory algorithm r… Mark Andrews
- Re: [dnsext] Clarifying the mandatory algorithm r… Matthijs Mekking
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Samuel Weiler
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Brian Dickson
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Mark Andrews
- Re: [dnsext] Clarifying the mandatory algorithm r… Samuel Weiler
- Re: [dnsext] Clarifying the mandatory algorithm r… Mark Andrews
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Casey Deccio
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Casey Deccio
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Casey Deccio
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Matthijs Mekking
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Matthijs Mekking
- Re: [dnsext] Clarifying the mandatory algorithm r… Edward Lewis
- Re: [dnsext] Clarifying the mandatory algorithm r… Samuel Weiler
- [dnsext] MAR proposal #1: Algorithm downgrade pro… Samuel Weiler
- Re: [dnsext] MAR proposal #1: Algorithm downgrade… Samuel Weiler
- [dnsext] MAR proposal #2: Allowing pre-publishing… Samuel Weiler
- Re: [dnsext] MAR proposal #1: Algorithm downgrade… Edward Lewis
- Re: [dnsext] MAR proposal #2: Allowing pre-publis… Edward Lewis
- Re: [dnsext] MAR proposal #1: Algorithm downgrade… Mark Andrews
- Re: [dnsext] MAR proposal #1: Algorithm downgrade… Paul Hoffman
- Re: [dnsext] MAR proposal #2: Allowing pre-publis… Paul Hoffman
- Re: [dnsext] MAR proposal #1: Algorithm downgrade… Brian Dickson
- Re: [dnsext] MAR proposal #2: Allowing pre-publis… Marc Lampo
- Re: [dnsext] MAR proposal #2: Allowing pre-publis… Matthijs Mekking
- Re: [dnsext] MAR proposal #2: Allowing pre-publis… Joe Abley
- Re: [dnsext] Clarifying the mandatory algorithm r… weiler