Assignment 10

Indexes

by zazagalaxy

HTML

<h1>
  Password Hashing
</h1>
<h2>Assignment 10</h2>
<form id="form">
  <div id="my-div">
    Password to List<br>
    <input type="text" id="addPassword" value=""><br>
    <input type="button" value="Submit" id="add"><br>
    Check for Password<br>
    <input type="text" id="chkPassword" value="" /><br>
    <input type="button" value="Submit" id="check" />
  </div>
</form>

<div id="output"></div>

CSS

#add,
#check {
  background-color: maroon;
  color: black;
  margin-top: 10px;
  margin-bottom: 10px;
  width: 12em;
}

JavaScript

document.getElementById('check').onclick = function() {
  var input = document.getElementById("chkPassword").value;
  list.search(hashCode(input)); //hash the input taken from the user
}

function List() {
  this.head = null;
  this.length = 0;
}

function Node(_content) {
  this.content = _content;
  this.next = null;
}
List.prototype.push = function(_content) {
  var node = new Node(_content);

  if (!this.head) {
    this.head = node;
    this.length++;
  } else {
    var current = this.head;
    while (current.next) {
      current = current.next;
    }
    current.next = node;
    this.length++;
  }
}
List.prototype.pop = function() {
  if (this.head) {
    var itemToPop = this.head;
    this.head = this.head.next;
    this.length--;
    return itemToPop.content;
  } else {
    return false;
  }
}
List.prototype.search = function(_item) {
  let current = this.head;
  while (current) {
    if (current.content == _item) {
      document.getElementById('output').innerHTML = "Password found";
      return true;
    } else {
      document.getElementById('output').innerHTML = "Password not found";
      return false;
    }
    current = current.next;
  }

}
// Initialize new linked list
var list = new List();


function hashCode(str) {
  var hash = 0;

  for (let i = 0; i < str.length; i++) {
    var char = str.charCodeAt(i);
    hash = ((hash << 5) - hash) + char;
    hash = hash & hash; // Convert to 32bit integer
  }
  return hash;
}

//This function will take user input and take the hash value of it 
// and push it to the list.Storing only the hashed value, and not 
// not the password itself
document.getElementById('add').onclick = function() {
  var uInput = document.getElementById("addPassword").value;
  list.push(hashCode(uInput));
}