Re: [TLS] New Cached info draft
Marsh Ray <marsh@extendedsubset.com> Wed, 31 March 2010 20:13 UTC
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Date: Wed, 31 Mar 2010 15:14:27 -0500
From: Marsh Ray <marsh@extendedsubset.com>
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Subject: Re: [TLS] New Cached info draft
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On 3/31/2010 2:47 PM, Martin Rex wrote: > Brian Smith wrote: >> >> Marsh Ray wrote: >>> >>> I think in this case it's saying there can be a maximum of 1024 >>> entries in the list, each of which can take up to 9 bytes >>> (with a one byte length). So the receiver of this structure >>> is only obligated to store (or ignore) (2 + (1 + 8)*1024) >>> bytes of data. >> >> No, Mike is right and I was wrong; <1024> means "1024 bytes", >> not "1024 entries". > > While Marsh explanation sounded quite reasonable to me, > the implementors have a technical advantage of being more > accustomed to the TLS spec syntax for defining a vector size: > > http://tools.ietf.org/html/rfc5246#section-4.3 It says: > The length of > an encoded vector must be an even multiple of the length of a single > element (for example, a 17-byte vector of uint16 would be illegal). This requirement does not seem to allow a vector to be made up of variable-sized elements as in Stefan's suggestion. On 3/31/2010 4:42 AM, Stefan Santesson wrote: > > struct { > CachedInformationType type; > opaque digest_value<0..8>; > } CachedObject; > > struct { > CachedObject cached_info<1..1024>; > } CachedInformation; So perhaps some other notation is needed for this class of structure? On 3/31/2010 10:52 AM, Michael D'Errico wrote: > > This idea has buffer overflow written all over it. Now I'm inclined to agree! There are something like four potentially contradictory byte lengths in play. - Marsh
- Re: [TLS] New Cached info draft Stefan Santesson
- Re: [TLS] New Cached info draft Stefan Santesson
- [TLS] New Cached info draft Stefan Santesson
- Re: [TLS] New Cached info draft Kemp, David P.
- Re: [TLS] New Cached info draft Adam Langley
- Re: [TLS] New Cached info draft Stefan Santesson
- Re: [TLS] New Cached info draft Stefan Santesson
- Re: [TLS] New Cached info draft Marsh Ray
- Re: [TLS] New Cached info draft Marsh Ray
- Re: [TLS] New Cached info draft Stefan Santesson
- Re: [TLS] New Cached info draft Stefan Santesson
- Re: [TLS] New Cached info draft Stefan Santesson
- Re: [TLS] New Cached info draft Simon Josefsson
- Re: [TLS] New Cached info draft Stefan Santesson
- Re: [TLS] New Cached info draft Adam Langley
- Re: [TLS] New Cached info draft Brian Smith
- Re: [TLS] New Cached info draft Brian Smith
- Re: [TLS] New Cached info draft Stefan Santesson
- Re: [TLS] New Cached info draft Martin Rex
- Re: [TLS] New Cached info draft Stefan Santesson
- Re: [TLS] New Cached info draft Brian Smith
- Re: [TLS] New Cached info draft Martin Rex
- Re: [TLS] New Cached info draft Stefan Santesson
- Re: [TLS] New Cached info draft Brian Smith
- Re: [TLS] New Cached info draft Stefan Santesson
- Re: [TLS] New Cached info draft Stefan Santesson
- Re: [TLS] New Cached info draft Michael D'Errico
- Re: [TLS] New Cached info draft Marsh Ray
- Re: [TLS] New Cached info draft Brian Smith
- Re: [TLS] New Cached info draft Adam Langley
- Re: [TLS] New Cached info draft Stefan Santesson
- Re: [TLS] New Cached info draft Martin Rex
- Re: [TLS] New Cached info draft Martin Rex
- Re: [TLS] New Cached info draft Marsh Ray
- Re: [TLS] New Cached info draft Martin Rex