mlinksva / jsbn

The jsbn library is a fast, portable implementation of large-number math in pure JavaScript, enabling public-key crypto and other applications on desktop and mobile browsers.

jsbn: javascript big number

Tom Wu's Original Website

I felt compelled to put this on github and publish to npm. I haven't tested every other big integer library out there, but the few that I have tested in comparison to this one have not even come close in performance. I am aware of the bi module on npm, however it has been modified and I wanted to publish the original without modifications. This is jsbn and jsbn2 from Tom Wu's original website above, with the modular pattern applied to prevent global leaks and to allow for use with node.js on the server side.

usage

var BigInteger = require('jsbn');

var a = new BigInteger('91823918239182398123');
alert(a.bitLength()); // 67

API

bi.toString()

returns the base-10 number as a string

bi.negate()

returns a new BigInteger equal to the negation of bi

bi.abs

returns new BI of absolute value

bi.compareTo

bi.bitLength

bi.mod

bi.modPowInt

bi.clone

bi.intValue

bi.byteValue

bi.shortValue

bi.signum

bi.toByteArray

bi.equals

bi.min

bi.max

bi.and

bi.or

bi.xor

bi.andNot

bi.not

bi.shiftLeft

bi.shiftRight

bi.getLowestSetBit

bi.bitCount

bi.testBit

bi.setBit

bi.clearBit

bi.flipBit

bi.add

bi.subtract

bi.multiply

bi.divide

bi.remainder

bi.divideAndRemainder

bi.modPow

bi.modInverse

bi.pow

bi.gcd

bi.isProbablePrime