Re: [websec] Strict-Transport-Security syntax redux
Julian Reschke <julian.reschke@gmx.de> Sat, 29 October 2011 08:07 UTC
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Date: Sat, 29 Oct 2011 10:07:28 +0200
From: Julian Reschke <julian.reschke@gmx.de>
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To: Adam Barth <ietf@adambarth.com>
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Cc: IETF WebSec WG <websec@ietf.org>
Subject: Re: [websec] Strict-Transport-Security syntax redux
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On 2011-10-29 05:08, Adam Barth wrote: > ... >> Except for RFC6265, which in the algorithm for parsing "Max-Age=", it >> algorithmically provides for ignoring a value that doesn't match the >> effective value ABNF of.. >> >> ["-"]*DIGIT >> >> ..which would catch the max-age="1" case, but doesn't seem to explicitly >> address.. >> >> max-age= > > That's handled by some more general processing rules in the spec. The > net result is that it's ignored. > >> But in any case, perhaps (additional) browser implementor folk could chime >> in here -- do we really need to address such detail-level issues (both of >> the examples above and below) in the syntax/grammar we specify in specs such >> as these? Or is the new ABNF proposed in the original message in this thread >> sufficient? > > Generally, we prefer to be instructed exactly how to behave for every > possible input (even illegal ones). There's a long history of > quoted-string not being implemented correctly by browsers. I spec > this as just splitting the string on ; and then processing each > substring separately, ignoring bogus/future ones. I know Julian has a > dream that all HTTP headers will be parsed the same, but quoted-string > is sufficiently ill-defined w.r.t. error handling that I prefer to > avoid it. > ... - when discussing generic parsing, we need to distinguish between legacy cases like cookies, and new headers, where we can do better - standardizing handling of broken headers is one thing (and in general I prefer not to), but that doesn't mean that when defining a new header field we shouldn't minimize the things a sender can get wrong; if we know that some recipients will accept both token and quoted-string anyway, then it seems like a good thing to simply allow them both, reducing the number of special-cases in parsing - not sure what you mean by "ill-defined w.r.t. error handling"; it's defined just like most other syntax elements in HTTP -- is there something *specific* to quoted-string you have in mind? Best regards, Julian
- [websec] Strict-Transport-Security syntax redux Ryan Sleevi
- Re: [websec] Strict-Transport-Security syntax red… =JeffH
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- [websec] Strict-Transport-Security syntax redux =JeffH
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… =JeffH
- Re: [websec] Strict-Transport-Security syntax red… =JeffH
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Phillip Hallam-Baker
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… Bjoern Hoehrmann
- Re: [websec] Strict-Transport-Security syntax red… Phillip Hallam-Baker
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… =JeffH
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… Roy T. Fielding
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… Tobias Gondrom
- Re: [websec] Strict-Transport-Security syntax red… Anne van Kesteren
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Paul Hoffman
- Re: [websec] Strict-Transport-Security syntax red… Anne van Kesteren
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Anne van Kesteren
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Bjoern Hoehrmann
- Re: [websec] Strict-Transport-Security syntax red… Adam Barth
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Paul Hoffman
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Marsh Ray
- Re: [websec] Strict-Transport-Security syntax red… Julian Reschke
- Re: [websec] Strict-Transport-Security syntax red… Bjoern Hoehrmann