On Wed, Mar 10, 2004, mateus wrote:

> Hi Steve,
> 
>     I understand that I would not have to calculate this to use a 
> private key, but the axalto cryptoflex
> smart card I'm using needs the RSA key in the following format to work:
> 
> 
> This format I've got in the "Programmer's Guide of Cryptoflex Cards".
> The problem is that I don't know how to calculate a, c and f. This same 
> guide
> gave me the following formulas:
> 
> 
> The problem is that I do not know what is "Ks" and I'm not shure of what 
> is the "mod"
> operator. I do know the remainer of interger dividion (%) from C 
> language, but is this the same.
> I thought the references to Montgomery constants in the RSA structure 
> would be helpfull, bul I don't know
> how to use the either.
> So, I'd just like to know how to find a way to put my RSA key in the 
> format above in order to
> record it in my smart card.
> 
> 

The look like the standard CRT components. 

So:

a = iqmp
c = dmp1
f = dmq1

Steve.
--
Dr Stephen N. Henson. Email, S/MIME and PGP keys: see homepage
OpenSSL project core developer and freelance consultant.
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