Re: [Acme] ALPN based TLS challenge

2018-03-05 Thread Tim Hollebeek
holes compared to the presently-industry-accepted methods of validating domain control. Doug From: Acme [mailto:acme-boun...@ietf.org <mailto:acme-boun...@ietf.org> ] On Behalf Of Daniel McCarney Sent: Monday, February 26, 2018 2:14 PM Cc: IETF ACME mailto:acme@ietf.org> > Subj

Re: [Acme] ALPN based TLS challenge

2018-02-26 Thread Salz, Rich
It’s good to see that there is a great deal of outside interest in this draft. It would be *really way much better* if we first had the main document done. Folks involved in that, please don’t get distracted by this – there will be plenty of time later. But first let’s get the main document in

Re: [Acme] ALPN based TLS challenge

2018-02-26 Thread Matthew D. Hardeman
I would concur that this mechanism far exceeds the original TLS-SNI-0x proposals. Significantly, it no longer abuses SNI routing flows over which initial assumptions about web host behavior were not borne out in the field. Instead, it requires that the server-side end of the TLS conversation b

Re: [Acme] ALPN based TLS challenge

2018-02-26 Thread Doug Beattie
the mitigations, which is good – we need TLS based method. From: Ryan Sleevi [mailto:ryan-i...@sleevi.com] Sent: Monday, February 26, 2018 4:09 PM To: Doug Beattie Cc: c...@letsencrypt.org; IETF ACME Subject: Re: [Acme] ALPN based TLS challenge On Mon, Feb 26, 2018 at 3:33 PM, Doug Beattie

Re: [Acme] ALPN based TLS challenge

2018-02-26 Thread Ryan Sleevi
> > > Doug > > > > *From:* Acme [mailto:acme-boun...@ietf.org] *On Behalf Of *Daniel McCarney > *Sent:* Monday, February 26, 2018 2:14 PM > *Cc:* IETF ACME > *Subject:* Re: [Acme] ALPN based TLS challenge > > > > +1 > > The WG should adopt thi

Re: [Acme] ALPN based TLS challenge

2018-02-26 Thread Doug Beattie
with the CABF? I’d recommend that someone send this out to the public list for feedback. Doug From: Acme [mailto:acme-boun...@ietf.org] On Behalf Of Daniel McCarney Sent: Monday, February 26, 2018 2:14 PM Cc: IETF ACME Subject: Re: [Acme] ALPN based TLS challenge +1 The WG should adopt this

Re: [Acme] ALPN based TLS challenge

2018-02-26 Thread Daniel McCarney
+1 The WG should adopt this document. I will volunteer to help review if adopted. On Mon, Feb 26, 2018 at 12:02 PM, Richard Barnes wrote: > +1 > > This approach is a major improvement from earlier efforts at a TLS-based > challenge. It follows normal TLS processing logic much more closely, >

Re: [Acme] ALPN based TLS challenge

2018-02-26 Thread Richard Barnes
+1 This approach is a major improvement from earlier efforts at a TLS-based challenge. It follows normal TLS processing logic much more closely, differing only in the fact that the certificate presented has an extra extension. Minimizing the differences w.r.t. normal behavior seems like a good a

Re: [Acme] ALPN based TLS challenge

2018-02-23 Thread Roland Bracewell Shoemaker
I’ll be at the meeting in London and would be happy to give a quick introduction/overview of the method if adopted. > On Feb 23, 2018, at 8:31 AM, Salz, Rich wrote: > > >> Here is the ID: >> https://datatracker.ietf.org/doc/draft-shoemaker-acme-tls-alpn/ > > Should the WG adopt this docume

Re: [Acme] ALPN based TLS challenge

2018-02-23 Thread Ilari Liusvaara
On Fri, Feb 23, 2018 at 04:41:20PM +, Stephen Farrell wrote: > > > On 23/02/18 16:31, Salz, Rich wrote: > > > >> Here is the ID: > >> https://datatracker.ietf.org/doc/draft-shoemaker-acme-tls-alpn/ > > > > Should the WG adopt this document? > > Yes. > > Having a sufficiently secure mech

Re: [Acme] ALPN based TLS challenge [invalid signature!]

2018-02-23 Thread Ilari Liusvaara
On Fri, Feb 23, 2018 at 03:04:46PM +, Doug Beattie wrote: > > Oh yes, right. The scope of attack is only those domains that point to the > same IP address. But, this still relies on web hosting companies to have > secure configurations such that User A can’t get a cert for user B's domain >

Re: [Acme] ALPN based TLS challenge

2018-02-23 Thread Stephen Farrell
On 23/02/18 16:31, Salz, Rich wrote: > >> Here is the ID: >> https://datatracker.ietf.org/doc/draft-shoemaker-acme-tls-alpn/ > > Should the WG adopt this document? Yes. Having a sufficiently secure mechanism that works on port 443 is a good thing in general. I'm not sure how many folks were

Re: [Acme] ALPN based TLS challenge

2018-02-23 Thread Salz, Rich
>Here is the ID: > https://datatracker.ietf.org/doc/draft-shoemaker-acme-tls-alpn/ Should the WG adopt this document? Speak up now, we'll make a consensus decision next week. Also if you are able to help work on it. If adopted, I would expect this to be on the agenda for London next m

Re: [Acme] ALPN based TLS challenge [invalid signature!] [invalid signature!]

2018-02-23 Thread Sebastian Nielsen
everything in its power to ensure security. Originalmeddelande Från: Doug Beattie Datum: 2018-02-23 16:04 (GMT+01:00) Till: Sebastian Nielsen , 'Roland Bracewell Shoemaker' , 'Rich Salz' Kopia: 'IETF ACME' , 'Martin Thomson' Rubrik: RE:

Re: [Acme] ALPN based TLS challenge [invalid signature!]

2018-02-23 Thread Doug Beattie
I'm in for it also. Doug > -Original Message- > From: Sebastian Nielsen [mailto:sebast...@sebbe.eu] > Sent: Friday, February 23, 2018 9:48 AM > To: Doug Beattie ; 'Roland Bracewell > Shoemaker' ; 'Rich Salz' > Cc: 'IETF ACME' ; &#x

Re: [Acme] ALPN based TLS challenge [invalid signature!]

2018-02-23 Thread Sebastian Nielsen
; 'Roland Bracewell Shoemaker' ; 'Rich Salz' Kopia: 'IETF ACME' ; 'Martin Thomson' Ämne: RE: [Acme] ALPN based TLS challenge [invalid signature!] Does this prevent an advisory from setting up their own "hosting provider" and getting certificate

Re: [Acme] ALPN based TLS challenge

2018-02-23 Thread Doug Beattie
February 23, 2018 9:43 AM > To: Doug Beattie ; 'Roland Bracewell > Shoemaker' ; 'Rich Salz' > Cc: 'IETF ACME' ; 'Martin Thomson' > > Subject: SV: [Acme] ALPN based TLS challenge > > The problem was that there was hosting providers which

Re: [Acme] ALPN based TLS challenge

2018-02-23 Thread Sebastian Nielsen
ill: Roland Bracewell Shoemaker ; Rich Salz Kopia: IETF ACME ; Martin Thomson Ämne: Re: [Acme] ALPN based TLS challenge I'm probably not understanding a key piece of technical info about the protocol, but when I see this statement it makes me think it has similar issues to tls-sni-01. If

Re: [Acme] ALPN based TLS challenge

2018-02-23 Thread Ilari Liusvaara
On Fri, Feb 23, 2018 at 01:17:53PM +, Doug Beattie wrote: > I'm probably not understanding a key piece of technical info about the > protocol, but when I see this statement it makes me think it has similar > issues to tls-sni-01. If we're relying on the hosting provider enforcing > certain con

Re: [Acme] ALPN based TLS challenge

2018-02-23 Thread Doug Beattie
ilto:acme-boun...@ietf.org] On Behalf Of Roland Bracewell > Shoemaker > Sent: Friday, February 23, 2018 3:00 AM > To: Rich Salz > Cc: IETF ACME ; Martin Thomson > > Subject: Re: [Acme] ALPN based TLS challenge > > Here is the ID: https://datatracker.ietf.org/doc/draft-shoe

Re: [Acme] ALPN based TLS challenge

2018-02-23 Thread Roland Bracewell Shoemaker
Here is the ID: https://datatracker.ietf.org/doc/draft-shoemaker-acme-tls-alpn/ > On Feb 22, 2018, at 8:38 PM, Salz, Rich wrote: > > Yes, like Martin said, submit the individual draft and we can call for > adoption. > ___ Acme mailing list Acme@ietf

Re: [Acme] ALPN based TLS challenge

2018-02-22 Thread Ilari Liusvaara
On Thu, Feb 22, 2018 at 05:48:23PM -0800, Roland Bracewell Shoemaker wrote: > Hey all, > > After the issues with the SNI based TLS challenges were discovered > there was interest from a number of parties in developing another > challenge that did validation at the TLS layer. After some discussion

Re: [Acme] ALPN based TLS challenge

2018-02-22 Thread Salz, Rich
Yes, like Martin said, submit the individual draft and we can call for adoption. ___ Acme mailing list Acme@ietf.org https://www.ietf.org/mailman/listinfo/acme

Re: [Acme] ALPN based TLS challenge

2018-02-22 Thread Martin Thomson
Now is probably the time to publish in internet-draft form: https://datatracker.ietf.org/submit/ On Fri, Feb 23, 2018 at 12:48 PM, Roland Bracewell Shoemaker wrote: > Hey all, > > After the issues with the SNI based TLS challenges were discovered there was > interest from a number of parties in

[Acme] ALPN based TLS challenge

2018-02-22 Thread Roland Bracewell Shoemaker
Hey all, After the issues with the SNI based TLS challenges were discovered there was interest from a number of parties in developing another challenge that did validation at the TLS layer. After some discussion about possibilities we’ve come up with a new challenge type based on ALPN which we