On Tue, Apr 13, 2010 at 04:00:11PM +0300, Dmitry Kasatkin wrote:
>
> I would also:
> 1. calc hash(opad) using sw, export
> 2. hash(ipad ∥ message) using hw
> 3. then import and finup hash from step 1 with results of step 2 (using sw)

Step 3 is the problem.  If you perform step 3 in software then
there is no point in exporting a hmac(sha1) object.

We should instead add ahash support to hmac and use that.

Cheers,
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