add, subtract, multiply, euclidean divide bit arrays of any size
npm install bitmathbit arithmetic package to add, subtract, multiply, euclidean divide bit arrays of any size.
Uses Uint1Array.
``console`
npm i --save bitmath
`
import m from 'bitmath';
import Uint1Array from 'uint1array';
x = m.from(28); // create bit field from number 28
y = Uint1Array.of(1,1,1); // or just create using Uint1Array TypedArray
z = Uint1Array.of(0,1);
m.add(x,y)
m.mul(x,y)
m.div(x,y)
m.dif(x,y) // subtract (note: sign is omitted)
m.mod(x,y)
m.modexp(x,y,x)
``
Modexp using repeated squaring in a (trying to be) timesafe way is implemented.