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Re: [hybi] A WebSocket handshake

Willy Tarreau <w@1wt.eu> Wed, 06 October 2010 06:55 UTC

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Date: Wed, 06 Oct 2010 08:56:24 +0200
From: Willy Tarreau <w@1wt.eu>
To: Eric Rescorla <ekr@rtfm.com>
Message-ID: <20101006065624.GE20095@1wt.eu>
References: <AANLkTimQ5x-v+Mz_OHrNDdtVd94E+HOBWwo3_f1ktEeg@mail.gmail.com> <20101006053400.GC20095@1wt.eu> <AANLkTikFYP-LVS+dFZqd+v+M46KizAAq1mDH+t6Lcmau@mail.gmail.com>
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Cc: Hybi <hybi@ietf.org>
Subject: Re: [hybi] A WebSocket handshake
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On Tue, Oct 05, 2010 at 11:40:19PM -0700, Eric Rescorla wrote:
> On Tue, Oct 5, 2010 at 10:34 PM, Willy Tarreau <w@1wt.eu> wrote
> >
> > What I like with a payload-only encryption vs a connection encryption
> > is that it still maintains the ability to install dedicated filtering
> > components in schools. Such components will technically work as transparent
> > proxies and will just be MITM. They will have two encrypted channels,
> > one with the browser and one with the server and they'll be able to
> > see the exchanged data in clear text and be able to filter based on
> > that.
> >
> 
> I don't believe there is an issue here. This isn't a DH exchange--the keys
> are in the
> clear. A filtering appliance can passively decrypt the traffic.

indeed that's what I was saying, and that's what I like in this handshake
WRT a TLS handshake.

Regards,
Willy

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