[TLS]Re: HTTPS-RR and TLS

2024-05-21 Thread Ilari Liusvaara
On Tue, May 21, 2024 at 01:27:29AM +0100, Stephen Farrell wrote: > > > What HTTPS RR parameters do we expect will see regular changes, > and controlled by whom? > > It seems fairly clear that ECHConfig values will be changed > often, e.g. hourly, which I think motivates the wkech thing, > but I'm

[TLS]Re: HTTPS-RR and TLS

2024-05-21 Thread Stephen Farrell
Hiya, On 21/05/2024 08:53, Ilari Liusvaara wrote: Then there is possibility that IPv4 has gateway but IPv6 is direct- routed. Then HTTPS entires need to be duplicated with potentially different alpn values (filtered for IPv4, full for IPv6). HTTP/3 requires IPv6 in such setup (as opposed to not

[TLS]Re: Adoption Call for draft-davidben-tls-key-share-prediction

2024-05-21 Thread Eric Rescorla
I agree that it's attractive to be able to hint in the HTTPS RR, but I'm less sure about addressing the basic insecurity of the DNS channel with the approach this draft takes. I don't have a complete thought here, but what if we were to somehow fold the hint into the handshake transcript? I suppose

[TLS]Re: Adoption Call for draft-davidben-tls-key-share-prediction

2024-05-21 Thread David Benjamin
Off the cuff, folding it into the transcript sounds tricky, since existing TLS servers won't know to do it, and, as with any other DNS hints, we need to accommodate the DNS being out of sync with the server. It'll also be more difficult to deploy due to needing changes in the TLS stack and generall

[TLS]Re: Adoption Call for draft-davidben-tls-key-share-prediction

2024-05-21 Thread A A
In my opinion, to prevent downgrade attack, server MUST or SHOULD using DNSSEC when announcing DNS record.21.05.2024, 21:48, "David Benjamin" :Off the cuff, folding it into the transcript sounds tricky, since existing TLS servers won't know to do it, and, as with any other DNS hints, we need to acc

[TLS]Re: Adoption Call for draft-davidben-tls-key-share-prediction

2024-05-21 Thread David Benjamin
Servers using DNSSEC won't help unless the client only honors the hint over DNSSEC, and we do not live in a universe where DNSSEC succeeded to the point that that's remotely viable. I think that too can be discussed in detail post adoption, but I think such a change would negate the value of this

[TLS]Re: [rfc9147] Clarification on DTLS 1.3 CID Retirement and Usage

2024-05-21 Thread Kristijan Sedlak
Thank you for your comments. Since I hadn't received any feedback, I shifted my focus to other issues and needed some time to revisit this topic. I've realized that CIDs in DTLS 1.3 are loosely defined, and the more I investigate, the more I understand that this is actually very beneficial, muc

[TLS]Re: HTTPS-RR and TLS

2024-05-21 Thread Ilari Liusvaara
On Tue, May 07, 2024 at 08:05:05AM -0700, David Benjamin wrote: > > draft-ietf-tls-wkech seems like a good model for this, but it is currently > written specifically for ECH. What are your thoughts on generalizing that > document to cover other cases as well? > https://github.com/sftcd/wkesni/issu

[TLS]Re: WG Adoption for TLS Trust Expressions

2024-05-21 Thread David Benjamin
(replies inline) On Sun, May 5, 2024 at 6:48 PM Dennis Jackson wrote: > Hi David, Devon, Bob, > > I feel much of your response talks past the issue that was raised at IETF > 118. > > The question we're evaluating is NOT "If we were in a very unhappy world > where governments controlled root cert

[TLS]Re: WG Adoption for TLS Trust Expressions

2024-05-21 Thread David Benjamin
Hi Richard. Thanks for the comments! Replies inline. On Mon, May 6, 2024 at 10:23 AM Richard Barnes wrote: > Hi all, > > Coming in late here. Appreciate the discussion so far. FWIW, here's how > I'm thinking through this: > > I would frame the basic problem here as follows, since I think the u

[TLS]Re: WG Adoption for TLS Trust Expressions

2024-05-21 Thread Nick Harper
On Mon, May 20, 2024 at 7:26 AM Dennis Jackson wrote: > Compared to the alternatives, Trust Expressions seems to solve the > problems less effectively and introduce much greater risks. If you really > feel the opposite is true, I would strongly encourage you to: > b) Make a good faith attempt to

[TLS]Re: Adoption Call for draft-davidben-tls-key-share-prediction

2024-05-21 Thread Eric Rescorla
These are all fair points, and it's possible we don't need to do anything with the transcript. I don't think we need to resolve this before adoption, I just wanted to make sure that I said something now to make sure people weren't surprised later. -Ekr On Tue, May 21, 2024 at 6:46 AM David Benj

[TLS]Re: WG Adoption for TLS Trust Expressions

2024-05-21 Thread Stephen Farrell
Hiya, A slightly meta comment: On 21/05/2024 19:05, Nick Harper wrote: From a process perspective, considering how a technology could be abused is important and should be addressed to a reasonable level in the RFC. I don't see a need for this to be fully fleshed out with every possible abus

[TLS]Re: WG Adoption for TLS Trust Expressions

2024-05-21 Thread Dennis Jackson
Hi Nick, On 21/05/2024 19:05, Nick Harper wrote: [...] Perhaps there are additional ways to use Trust Expressions to censor the web that are more practical and more useful than the existing techniques that I didn't consider. There are most certainly other forms of domestic control of the Web

[TLS]Re: Adoption Call for draft-davidben-tls-key-share-prediction

2024-05-21 Thread Joseph Salowey
There is consensus to adopt this draft as a working group item. I'll work with the authors to migrate to the official repository and submit an updated draft. On Tue, May 21, 2024 at 11:23 AM Eric Rescorla wrote: > These are all fair points, and it's possible we don't need to do anything > with

[TLS]The TLS WG has placed draft-davidben-tls-trust-expr in state "Candidate for WG Adoption"

2024-05-21 Thread IETF Secretariat
The TLS WG has placed draft-davidben-tls-trust-expr in state Candidate for WG Adoption (entered by Joseph Salowey) The document is available at https://datatracker.ietf.org/doc/draft-davidben-tls-trust-expr/ ___ TLS mailing list -- tls@ietf.org To uns

[TLS]Re: WG Adoption for TLS Trust Expressions

2024-05-21 Thread Nick Harper
On Tue, May 21, 2024 at 3:00 PM Dennis Jackson wrote: > This thread is now 40+ messages deep and I guess you might have not seen > much of the previous discussion. I actually agree with much of your > analysis, but it focused on the wrong question, as I wrote earlier in this > thread: > > The que