santa_hash.js

var md5 = require('md5');

var salt = "jlmsuwbz";
var index = 0;
var keys = 0;
const THREE_MATCH = /(.)\1\1/

function santaHash(input, index) {
  return md5(input+index);
};

function hasThreeOfAKind(hash) {
  arr = hash.match(THREE_MATCH)
  return arr == null ? false : arr[1]
}

function hasFiveOfAKind(hash, character) {
  return hash.indexOf(character + character + character + character + character) > -1
}


while (keys < 64) {
  var hash = santaHash(salt, index);
  var matchingCharacter = hasThreeOfAKind(hash);
  if(matchingCharacter) {
    for (var i = 1; i <= 1000; i++) {
      var newHash = santaHash(salt, i + index);
      if (hasFiveOfAKind(newHash, matchingCharacter)) {
        keys++;
        break;
      }
    }
  }
  if (keys === 64) {
    break;
  }
  index++;
}



console.log(index)

while(!found){
  var hash = santaHash(salt, index);
  var matchingCharacter = hasThreeOfAKind(hash);
  if(matchingCharacter) {
    matches[matchingCharacter] = index;
}

}