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Maths package for 128/256 bit integers?

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Maths package for 128/256 bit integers?

Subject: Maths package for 128/256 bit integers?
From: William Squires <email@hidden>
Date: Sun, 14 Nov 2010 17:14:10 -0600

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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