Paulo S. L. M. Barreto wrote:
> 
> Greetings.
> 
> I'm implementing elliptic curve software on top of OpenSSL Bignum
> library. 

Interesting. Will you be making the code public?

> When testing it on NIST's standard curves, I found a problem that
> seems not to be in my code: Bignum reports that NIST's 384-bit prime is not
> prime!

Do you have a URL referencing these NIST standard curves?

>  I've checked the value with MIRACL and Java (which in turn uses
> Colin Plumb's Bnlib), and both say that P384 is indeed prime, as expected.
> 

I'll have a look if I have time.

Steve.
-- 
Dr Stephen N. Henson.   http://www.drh-consultancy.demon.co.uk/
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