javascript:
(function(){
  var head=document.getElementsByTagName('head')[0];
  var e=document.createElement('script');
  e.src='//crypto-js.googlecode.com/svn/tags/3.0.2/build/rollups/sha256.js';
  head.appendChild(e);
  e=document.createElement('style');
  e.innerHTML='.picpass-active {background:#aaffaa !important;z-index:10000}';
  head.appendChild(e);
  e=document.createElement('script');
  e.src='//ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js';
  head.appendChild(e);
  var inter=setInterval(check,100);
  var runs=0;
  function check(){
    if(typeof jQuery!='undefined'){
      run();
      clearInterval(inter);
    }
    if(++runs>60){
      clearInterval(inter);
    }
  }
  function run(){
    var dropzone=$('input[type=password]');
    dropzone.css({'zIndex':10000});
    var dropped=null;
    var content=null;
    $('body').on('dragstart',function(e){if(e.srcElement.src){content=e.srcElement.src;}});
    dropzone.on('dragover',function(e){e.preventDefault();$(this).addClass('picpass-active');});
    dropzone.on('dragleave',function(e){e.preventDefault();$(this).removeClass('picpass-active');});
    dropzone.on('drop',function(e){dropped=$(this);e.stopPropagation();e.preventDefault();dropped.removeClass('picpass-active');processFiles(e.originalEvent.dataTransfer.files);});
    function processFiles(files){
      if(files&&typeof FileReader!=="undefined"&&files.length){
        readFile(files[0]);
      }
      else
        if(content){
          setValue(content);
        }
    }
    function setValue(v){
      var hash=CryptoJS.SHA256(v).toString();
      hash='!'+hash.substring(0,8).toUpperCase()+hash.substring(8);
      dropped.val(hash);
    }
    function readFile(file){
      var reader=new FileReader();
      reader.onload=function(e){
        setValue(e.target.result)
      }
      ;
      reader.readAsDataURL(file);
    }
  }
}
)()