8-bit modular exponentiation code?

[Mike Rosing]

On Fri, 30 May 2003, Major Variola (ret) wrote:

> >On Fri, May 23, 2003 at 11:36:58AM -0700, Major Variola (ret.) wrote:
> >> Anyone know of any open-source modexp code for 8-bit cpus?
>
> Thank you for your response, however (for the record) that code requires
>
> at least a 16bit CPU.  From bnlib.doc (an amusing read, BTW):
>
> It is written in C, and should compile on any platform with an ANSI C
> compiler and 16 and 32-bit unsigned data types
>
> "Small" is defined as less than 65536, the minimum 16-bit word size
> supported by the library.

It can't be that hard to modify it to work with an 8 bitter.  I've
written an aweful lot of 40 bit floating point routines for everything
from 6809's to PIC's.  8 bit modulus code should be easy.

Patience, persistence, truth,
Dr. mike