hunter2/index.html at master · VSharapov/hunter2 · GitHub

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 <!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>title</title>
    <script>
      var pwDB = [
        {"auth":"bash.org","iden":"AzureDiamond","pass":"uhagre5"},
        {"auth":"example.com","iden":"user","pass":"cnff"},
      ];

      function makeSecret(pass, key) {
        return rot(pass, key.length);
      }

      function breakSecret(ciphertext, key) {
        return rot(ciphertext, 0-key.length);
      }

      function rot(stringIn, rotAmount) {
        sets = [
          "ABCDEFGHIJKLMNOPQRSTUVWXYZ",
          "abcdefghijklmnopqrstuvwxyz",
          "0123456789",
        ];
        var stringOut = "";
        for (i in stringIn) {
          var letter = stringIn[i];
          for (j in sets) {
            s = sets[j];
            if (s.includes(letter)){
              newIndex = (s.indexOf(letter) + rotAmount) % s.length;
              newIndex = (newIndex + s.length) % s.length; // JS negative modulo workaround
              //console.log(letter, s.indexOf(letter), newIndex, s[newIndex]);
              letter = s[newIndex];
              break;
            }
          }
          stringOut += letter;
        }
        return stringOut;
      }

      function decrypt () {
        if (document.getElementById('newPW').value == ""){
            document.getElementById('newPW').value = JSON.stringify(pwDB);
        } // Should run on init only

        var master = document.getElementById('master').value;
        if (master == "") {return;}
        pwDB = JSON.parse(document.getElementById('newPW').value);
        var out = document.getElementById('decoded');
        for (i in pwDB){
          entry = pwDB[i];
          entry['pass'] = breakSecret(entry['pass'], master)
          addOrUpdateDecodedEntry(entry);
        }
      }

      function addOrUpdateDecodedEntry(e) {
        authID = e['auth'] + '@' + e['iden'];
        var target = document.getElementById(authID);
        if (target == null){
          var decoded = document.getElementById('decoded');
          decoded.innerHTML += '<div id="' + authID + '"></div>';
          target = document.getElementById(authID);
        }
        newContent = ""
        newContent += "<hr />"
        newContent += "" + e['iden'] + '<span style="font-weight: bold;"> @ </span>' + e['auth'] + '<br />';
        newContent += '<input type="text" value="' + e['pass'] + '" />'
        target.innerHTML = newContent;
      }

      function encrypt () {
        var master = document.getElementById('master').value;
        newAuth = document.getElementById('newAuth').value;
        newIden = document.getElementById('newIden').value;
        newPass = document.getElementById('newPass').value;
        newPass = makeSecret(newPass, master);
        var newPW = document.getElementById('newPW');
        pwDB = [];
        pwDB.push({'auth': newAuth, 'iden': newIden, 'pass': newPass});
        newPW.value = JSON.stringify(pwDB);
      }
    </script>
  </head>
  <body onload="decrypt()">
    <form>
      Master passphrase:
      <input type="password" id="master" oninput="decrypt()" onchange="decrypt()" />
      <input type="button" value="decrypt" onclick="decrypt()" />
    </form>
    <hr />
    New entry:<br />
    Authority:  <input type="text"     id="newAuth" value="bash.org" /><br />
    Identity:   <input type="text"     id="newIden" value="AzureDiamond" /><br />
    Passphrase: <input type="password" id="newPass" value="hunter2" /><br />
    <input type="button" value="encrypt" onclick="encrypt()" /><br />
    <textarea id="newPW"></textarea><br />
    <div id="decoded"></div>
  </body>
</html>