On Tue, Jun 02, 2020 at 07:58:15AM +0200, tsalim--- via devel wrote: > At this point, I am working on adding support for numbers as large as 2^255 > as required by the length_encode function detailed on page 9 of the RFC. > > The C Programming Language does not support large numbers greater than > 2^63-1 as Java does. > > So I am working on making a small library for supporting numbers larger than > the constant mentioned above by storing the large number in an array. > There are plenty of arbitrary precission arithmetics libraries that provide a support for the big integers. E.g. gmp. I believe that once you try to plug your implementation into any cryptographic library, you will be coerced to use that library primitives for the big integers.
I want to say that implementing these primitives is a nice excercise, but it won't survive any real use case. -- Petr
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