Re: [Caml-list] Ocaml and cryptography

["Jehan Pagès" <jehan.marmottard@gmail.com>]

Hi,

2011/3/26 Anil Madhavapeddy <anil@recoil.org>:
> OpenSSL may also be using direct hardware instructions to speed up SHA1/AES, rather doing the work itself. Check out the AES-NI in newer Intel chips, or Padlock SHA1 in Via chips.
>
> This is quite handy, since it means you can also use them to speed up your library on modern chips, but fall back to a reasonably performant implementation if it's not available (without ever having to bind to the rather gnarly OpenSSL monster).
>

That's very interesting. If I had such a material, I would improve my
library to support any of them, just for the fun of doing so and
testing the difference.
Plus that must be interesting to see how from Ocaml I can access this
kind of material.

Unfortunately I don't (have).

Jehan

> Anil
>
> On 26 Mar 2011, at 06:47, Jehan Pagès <jehan.marmottard@gmail.com> wrote:
>
>> Hi,
>>
>> I see. Indeed I checked OpenSSL, it is using massively assembly code
>> for SHA1 and many other (all?) crypto code...
>>
>> And my tests on a 64 bits machine and the huge improvement for OpenSSL
>> there makes me think that they must be making very good use of the 64
>> bits register for saving the 32 bits words of SHA1 algorithm (they
>> probably make some calculation on 2 words at once thanks to this).
>>
>> Jehan
>>
>> 2011/3/25 Francis Dupont <Francis.Dupont@fdupont.fr>:
>>> This is not the first study about crypto implementation speeds.
>>> Usually the winner for heavily used algorithms is OpenSSL,
>>> BTW not because it is well written but simply because it is
>>> optmized in assembly for common platforms (including SSE* & co
>>> on x86).
>>>
>>> Regards
>>>
>>> Francis.Dupont@fdupont.fr
>>>
>>
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>