andrewrk

var crypto = require('crypto');
var assert = require('assert');

function mcHexDigest(str) {
  var hash = new Buffer(crypto.createHash('sha1').update(str).digest(), 'binary');
  // check for negative hashes
  var negative = hash.readInt8(0) < 0;
  if (negative) performTwosCompliment(hash);
  var digest = hash.toString('hex');
  // trim leading zeroes