jsbn.js BigInteger - how to instantiate with a normal number?

Question

I tried both :

var a = new BigInteger(5);

And

var b = new BigInteger(5, 10);

But both give me the error:

TypeError: 'undefined' is not an object (evaluating 'b.nextBytes')
bnpFromNumberjsbn2.js:126

Can you only instantiate with strings?

Answer 1

I'd wanted to give a better answer, but you didn't mention WHICH BigInteger library you were using.

// Yes, use the two '..'
var a = new BigInteger(5..toString());

// Of if you have a variable
var v = 10;
var a = new BigInteger(v.toString());

now, with this knowledge you can override BigInteger

(function() {
  var oldConstructor = BigInteger;
  BigInteger = function(v) {
    if (typeof v === "number") {
      return oldConstructor(""+v);
    }
    return oldConstructor(v);
  };

}());