L'octidi 8 brumaire, an CCXXIV, Rodger Combs a écrit : > Take a look at some results; CBC is significantly slower than CTR in both > libcrypto's and our AES code. There's some hardware limitation it hits.
Yes, that is to be expected. But I would expect something like this:
time(AES-X-CBC) - time(AES-X-ECB) = time(AES-Y-CBC) - time(AES-Y-ECB)
for X and Y in { 128, 192, 256 }. In other words, I expect the extra time
added by CBC to be independent from the key size.
But of course, having a benchmark to check that it is true is good.
So patch still ok, thanks.
Regards,
--
Nicolas George
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