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ccryptography128-bit

Is there a library or other way to do 128-bit math operations?

I am writing a cryptography application and need to work with 128 bit integers.

In addition to standard add, subtract, multiply, divide, and comparisons, I also need a power and modulo function as well.

Does anyone know of a library or other implementation that can do this? If not 128-bit, is there a 64-bit option available?

Solution

  • Check out the GNU Multiple Precision Arithmetic Library.