Re: Stephen Farrell's Discuss on draft-ietf-httpbis-cice-02: (with DISCUSS)

Stephen Farrell <stephen.farrell@cs.tcd.ie> Thu, 03 September 2015 09:51 UTC

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To: Julian Reschke <julian.reschke@greenbytes.de>, Mark Nottingham <mnot@mnot.net>
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From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Subject: Re: Stephen Farrell's Discuss on draft-ietf-httpbis-cice-02: (with DISCUSS)
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Hi Julian,

On 03/09/15 09:48, Julian Reschke wrote:
> On 2015-09-03 03:01, Stephen Farrell wrote:
>>
>>
>> On 03/09/15 01:52, Mark Nottingham wrote:
>>> Something like this, perhaps?
>>>    http://httpwg.github.io/specs/rfc7540.html#rfc.section.10.6
>>
>> Yes and no.
>>
>> No. The URL above is for HTTP/2 and this is a header usable in
>> HTTP/1.1 so is not the same. Adding this to a system that is
>> currently safe wrt BREACH is also perhaps not the same as doing
>> HTTP/2 from scratch and ending up safe wrt BREACH.
> 
> Note that the spec doesn't really introduce compression for
> client->server. This feature has been around for ages. All the spec does
> is make feature discovery and diagnostics easier.

I don't understand your last sentence above. Isn't this a signal
that will cause request compression to be turned on in cases when
it wasn't previously? If not, then I at least misread the text.
If so, then the "All" in your sentence doesn't seem correct.

> 
> I agree that it would be good to have security considerations with
> respect to gzip encoding in HTTP/1.1, but that ultimately belongs into
> the revisions of RFC 7230 and 7231, not here. (I just opened
> https://github.com/httpwg/http11bis/issues/6>).

Ok good.

> 
>> But more importantly, yes, I'm asking about the kind of analysis
>> that lead to the section 10.6 you point at.
> 
> There was no analysis because the use of compression in this
> client->server direction really really isn't new at all.

Hmmm.

S.

> 
> Best regards, Julian
> 
> 
> 
>