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Date: Wed, 15 Jul 2009 02:51:46 +0200
From: Robert Buchholz <>
Cc: Florian Weimer <>
Subject: Re: Fixing the XML signature HMAC truncation authentication bypass

On Wednesday 15 July 2009, Robert Buchholz wrote:
> 1) Apache
> Bug:
> Patch:
> It seems they disallow HMAC truncation completely.
> * In my personal opinion the best move (since we're dealing with XML,
>   who cares about an additional <16 bytes?)

This was Java only, the C++ variant has this fix:

which is 80/half.


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