[ietf-dkim] 1193 considered harmful

Stephen Farrell stephen.farrell at cs.tcd.ie
Tue Mar 21 12:24:35 PST 2006



Jim Fenton wrote:
> Just in the interest of accuracy...
> 
> Barry Leiba wrote:
>> Third, as was pointed out, a sender could hash a large body once and
>> send it multiple times, possibly saving a lot of time/effort.
> 
> This doesn't depend on the new hashing proposal.  A signer could do this
> under the current proposal.

Really? I thought the structure of allman-01 was to hash the
catenation of some-header-stuff, then the body then the
DKIM-signature stuff. In that case, the body hash is not useful,
at least with any standard hashing API.

S.



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