Re: [TLS] WGLC for draft-ietf-tls-ticketrequests
Hubert Kario <hkario@redhat.com> Fri, 15 November 2019 13:43 UTC
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From: Hubert Kario <hkario@redhat.com>
To: Daniel Migault <daniel.migault@ericsson.com>
Cc: tls <tls@ietf.org>
Date: Fri, 15 Nov 2019 14:43:15 +0100
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Subject: Re: [TLS] WGLC for draft-ietf-tls-ticketrequests
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On Friday, 15 November 2019 13:00:14 CET, Daniel Migault wrote: > Hi Hubert, > > On Thu, Nov 14, 2019 at 12:33 PM Hubert Kario <hkario@redhat.com> wrote: > >> On Thursday, 14 November 2019 18:18:52 CET, Daniel Migault wrote: >>> Hi Hubert, >>> I understand the reasons for SHOULD. At least this should be documented. >>> To >>> address your first point, of course the specification applies to the >>> server >>> that support the extension. >> >>> Your second concern is solved by limiting the >>> NTS of KEX. >> >> by "KEX" you mean handshake? but New Session Ticket messages are not sent >> during handshake, they are sent after handshake is finished > > yes. I would consider the NST as part of the handshake even for those sent > after the post-handshake authentication. that would make tickets useless for sessions that use PHA > I agree better terms may be used. > The rekey aspect seems to me out of the handshake. rekey also don't impact the keys used for derivation of session ticket secrets... >> so how exactly you want to decide when server stopped sending NSTs after >> handshake finished? >> > > That the spec does not mention it does not mean this will not be defined. > Instead it means each implementer will have its own logic, definitions and > outputs. The same reasoning occurs to the complexity argument,not > specifying it does not reduce the complexity but let it to the > implementation with all unexpected corner cases. my point is that there is no good way to define it, if you want the count to be limited, you need provide a good way to do that I say that there isn't one, so defining it is futile >>> The third point is addressed by the minimum of the (count, >>> server_nbr). Note that I see count as a maximum. Overall I do not think >>> this would add much complexity. The only complexity I see is when a >> server >>> sends NTS at different time in the KEX. >> >> again, and what if the server misbehaves? >> > > Again, it would be a bug but the current spec is very permissive, at least > in my opinion. I do not believe that not specifying the expected behaviors > will prevent misbehaviors to happen, it, instead simply legitimates them. a MUST requires strict definition, which we can't provide, a SHOULD is already in the draft -- Regards, Hubert Kario Senior Quality Engineer, QE BaseOS Security team Web: www.cz.redhat.com Red Hat Czech s.r.o., Purkyňova 115, 612 00 Brno, Czech Republic
- [TLS] WGLC for draft-ietf-tls-ticketrequests Sean Turner
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Salz, Rich
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Martin Thomson
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Christopher Wood
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Christopher Wood
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Christopher Wood
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Christopher Wood
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Christopher Wood
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Hubert Kario
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Christopher Wood
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Hubert Kario
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Hubert Kario
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Benjamin Kaduk
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Jeremy Harris
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Benjamin Kaduk
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Tommy Pauly
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Tommy Pauly
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests David Schinazi
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Rob Sayre
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Christopher Wood
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Martin Thomson
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests David Schinazi
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Rob Sayre
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests David Schinazi
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Rob Sayre
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Benjamin Kaduk
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Rob Sayre
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Benjamin Kaduk
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Rob Sayre
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Sean Turner
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Nico Williams
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Hubert Kario
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Martin Thomson
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Martin Thomson
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Eric Rescorla
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Salz, Rich
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Salz, Rich
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Eric Rescorla
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Nico Williams
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Watson Ladd
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Nico Williams
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Nico Williams
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Hubert Kario
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Watson Ladd
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Nico Williams
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Tommy Pauly
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Nico Williams
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Salz, Rich
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Rob Sayre
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Nico Williams
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Rob Sayre
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Nico Williams
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Rob Sayre
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Nico Williams
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Nico Williams
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Tommy Pauly
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Tommy Pauly
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Nico Williams
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Rob Sayre
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Stephen Farrell
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Salz, Rich
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Rob Sayre
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Salz, Rich
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Rob Sayre
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Salz, Rich
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Tommy Pauly
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Watson Ladd
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Watson Ladd
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Tommy Pauly
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Eric Rescorla
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Eric Rescorla
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Eric Rescorla
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Nico Williams
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Tommy Pauly
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Bill Frantz
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Rob Sayre
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Eric Rescorla
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Tommy Pauly
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Eric Rescorla
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Rob Sayre
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Ben Schwartz
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Ben Schwartz
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Daniel Migault
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Rob Sayre
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Hubert Kario
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Jeremy Harris
- Re: [TLS] WGLC for draft-ietf-tls-ticketrequests Viktor Dukhovni