I wrote some wrappers around the OpenSSL bignum library, available here:

https://github.com/davedelong/CHMath

Cheers,

Dave DeLong

On Nov 14, 2010, at 4:14 PM, William Squires wrote:

> I know some crypto algorithms use 128 or up to 256 bit keys - I'm hoping that 
> means there's a maths package (in C or ObjC) that'll provide for computations 
> (addition, subtraction, multiplication, division, and modulus, at least...) 
> and a way to convert them to<->from NSStrings. Anyone know of any? I'm trying 
> to rewrite an algorithm I made for NSUIntegers to use ever larger values for 
> cryptanalysis.
> 
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