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21 results

0093_alter_districthomepage_subheader.py

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    • vote.html 21.37 KiB 
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
  <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8" />
  <title>Helios Voting Booth</title>
  <link rel="stylesheet" type="text/css" href="css/booth.css" />
  <link rel="stylesheet" type="text/css" href="css/forms.css" />

<!--
  <script language="javascript" src="js/jscrypto/class.js"></script>
  <script language="javascript" src="js/jscrypto/bigint.dummy.js"></script>
  <script language="javascript" src="js/jscrypto/jsbn.js"></script>
  <script language="javascript" src="js/jscrypto/jsbn2.js"></script>
  <script language="javascript" src="js/jscrypto/sjcl.js"></script>
  <script language="javascript" src="js/underscore-min.js"></script>
  <script language="javascript" src="js/jquery-1.2.2.min.js"></script>
  <script language="javascript" src="js/jquery.query-2.1.5.js"></script>
  <script language="javascript" src="js/jquery-jtemplates.js"></script>
  <script language="javascript" src="js/jquery.json.min.js"></script>
  <script language="javascript" src="js/jscrypto/bigint.js"></script>
  <script language="javascript" src="js/jscrypto/random.js"></script>
  <script language="javascript" src="js/jscrypto/elgamal.js"></script>
  <script language="javascript" src="js/jscrypto/sha1.js"></script>
  <script language="javascript" src="js/jscrypto/sha2.js"></script>
  <script language="javascript" src="js/jscrypto/helios.js"></script>-->
  
  <script language="javascript" src="js/20160507-helios-booth-compressed.js"></script>
</head>
<body>
<div id="wrapper">
<span style="float:right; padding: 7px 15px 5px 10px;">[<a href="javascript:BOOTH.exit();">exit</a>]</span>
<div id="banner">Helios Voting Booth</div>
<div id="content">

<div id="header">
</div>

<script language="javascript">
// utils
BOOTH = {};

BOOTH.setup_templates = function() {
    if (BOOTH.templates_setup_p)
        return;

    var cache_bust = "?cb=" + new Date().getTime();

    $('#header').setTemplateURL("templates/header.html" + cache_bust);
    $('#election_div').setTemplateURL("templates/election.html" + cache_bust);
    $('#question_div').setTemplateURL("templates/question.html" + cache_bust);
    $('#seal_div').setTemplateURL("templates/seal.html" + cache_bust);
    $('#audit_div').setTemplateURL("templates/audit.html" + cache_bust);
    $('#footer').setTemplateURL("templates/footer.html" + cache_bust);

    BOOTH.templates_setup_p = true;
};

// set up the message when navigating away
BOOTH.started_p = false;

window.onbeforeunload = function(evt) {
  if (!BOOTH.started_p)
    return;

  if (typeof evt == 'undefined') {
    evt = window.event;
  }

  var message = "If you leave this page with an in-progress ballot, your ballot will be lost.";

      if (evt) {
    evt.returnValue = message;
  }

  return message;
};

BOOTH.exit = function() {
    if (confirm("Are you sure you want to exit the booth and lose all information about your current ballot?")) {
        BOOTH.started_p = false;
        window.location = BOOTH.election.cast_url;
    }
};

BOOTH.setup_ballot = function(election) {
  BOOTH.ballot = {};

  // dirty markers for encryption (mostly for async)
  BOOTH.dirty = [];

  // each question starts out with an empty array answer
  // and a dirty bit to make sure we encrypt
  BOOTH.ballot.answers = [];
  $(BOOTH.election.questions).each(function(i,x){
    BOOTH.ballot.answers[i] = [];
    BOOTH.dirty[i] = true;
  });
};

// all ciphertexts to null
BOOTH.reset_ciphertexts = function() {
  _(BOOTH.encrypted_answers).each(function(enc_answer, ea_num) {
    BOOTH.launch_async_encryption_answer(ea_num);
  });
};

BOOTH.log = function(msg) {
  if (typeof(console) != undefined)
    console.log(msg);
};

BOOTH.setup_workers = function(election_raw_json) {
  // async?
  if (!BOOTH.synchronous) {
      // prepare spots for encrypted answers
      // and one worker per question
      BOOTH.encrypted_answers = [];
      BOOTH.answer_timestamps = [];
      BOOTH.worker = new window.Worker("boothworker-single.js");
      BOOTH.worker.postMessage({
        'type': 'setup',
        'election' : election_raw_json
      });

      BOOTH.worker.onmessage = function(event) {
        // logging
        if (event.data.type == 'log')
          return BOOTH.log(event.data.msg);

        // result of encryption
        if (event.data.type == 'result') {
          // this check ensures that race conditions
          // don't screw up votes.
          if (event.data.id == BOOTH.answer_timestamps[event.data.q_num]) {
            BOOTH.encrypted_answers[event.data.q_num] = HELIOS.EncryptedAnswer.fromJSONObject(event.data.encrypted_answer, BOOTH.election);
            BOOTH.log("got encrypted answer " + event.data.q_num);
          } else {
            BOOTH.log("no way jose");
          }
        }
          };

      $(BOOTH.election.questions).each(function(q_num, q) {
        BOOTH.encrypted_answers[q_num] = null;
      });
  }
};

function escape_html(content) {
  return $('<div/>').text(content).html();
}

BOOTH.setup_election = function(raw_json, election_metadata) {
  // IMPORTANT: we use the raw JSON for safer hash computation
  // so that we are using the JSON serialization of the SERVER
  // to compute the hash, not the JSON serialization in JavaScript.
  // the main reason for this is unicode representation: the Python approach
  // appears to be safer.
  BOOTH.election = HELIOS.Election.fromJSONString(raw_json);

  // FIXME: we shouldn't need to set both, but right now we are doing so
  // because different code uses each one. Bah. Need fixing.
  BOOTH.election.hash = b64_sha256(raw_json);
  BOOTH.election.election_hash = BOOTH.election.hash

  // async?
  BOOTH.setup_workers(raw_json);

  document.title += ' - ' + BOOTH.election.name;

  // escape election fields
  $(['description', 'name']).each(function(i, field) {
    BOOTH.election[field] = escape_html(BOOTH.election[field]);
  });

  // TODO: escape question and answers

  // whether the election wants candidate order randomization or not
  // we set up an ordering array so that the rest of the code is
  // less error-prone. 
  BOOTH.election.question_answer_orderings = [];
  $(BOOTH.election.questions).each(function(i, question) {
    var ordering = new Array(question.answers.length);

    // initialize array so it is the identity permutation
    $(ordering).each(function(j, answer) {ordering[j]=j;});

    // if we want reordering, then we shuffle the array
    if (election_metadata && election_metadata.randomize_answer_order) {
      shuffleArray(ordering);
    }

    BOOTH.election.question_answer_orderings[i] = ordering;
  });

  $('#header').processTemplate({'election' : BOOTH.election, 'election_metadata': BOOTH.election_metadata});
  $('#footer').processTemplate({'election' : BOOTH.election, 'election_metadata': BOOTH.election_metadata});
  BOOTH.setup_ballot();
};

BOOTH.show = function(el) {
  $('.panel').hide();
  el.show();
  return el;
};

BOOTH.show_election = function() {
  BOOTH.show($('#election_div')).processTemplate({'election' : BOOTH.election});
};

    BOOTH.launch_async_encryption_answer = function(question_num) {
   BOOTH.answer_timestamps[question_num] = new Date().getTime();
   BOOTH.encrypted_answers[question_num] = null;
   BOOTH.dirty[question_num] = false;
   BOOTH.worker.postMessage({
      'type' : 'encrypt',
      'q_num': question_num,
      'answer' : BOOTH.ballot.answers[question_num],
      'id' : BOOTH.answer_timestamps[question_num]
   });
};

// check if the current question is ok
BOOTH.validate_question = function(question_num) {
    // check if enough answers are checked
    if (BOOTH.ballot.answers[question_num].length < BOOTH.election.questions[question_num].min) {
        alert('You need to select at least ' + BOOTH.election.questions[question_num].min + ' answer(s).');
        return false;
    }

    // if we need to launch the worker, let's do it
    if (!BOOTH.synchronous) {
       // we need a unique ID for this to ensure that old results
       // don't mess things up. Using timestamp.
       // check if dirty
       if (BOOTH.dirty[question_num]) {
         BOOTH.launch_async_encryption_answer(question_num);
       }
    }
    return true;
};

BOOTH.validate_and_confirm = function(question_num) {
  if (BOOTH.validate_question(question_num)) {
      BOOTH.seal_ballot();
  }
};

BOOTH.next = function(question_num) {
    if (BOOTH.validate_question(question_num)) {
        BOOTH.show_question(question_num + 1);
    }
};

BOOTH.previous = function(question_num) {
    if (BOOTH.validate_question(question_num)) {
        BOOTH.show_question(question_num - 1);
    }
};

// http://stackoverflow.com/questions/2450954/how-to-randomize-shuffle-a-javascript-array
function shuffleArray(array) {
  var currentIndex = array.length
    , temporaryValue
    , randomIndex
    ;

  // While there remain elements to shuffle...
  while (0 !== currentIndex) {
     // Pick a remaining element...
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex -= 1;

    // And swap it with the current element.
    temporaryValue = array[currentIndex];
    array[currentIndex] = array[randomIndex];
    array[randomIndex] = temporaryValue;
  }

  return array;
    }

BOOTH.show_question = function(question_num) {
  BOOTH.started_p = true;

  // the first time we hit the last question, we enable the review all button
  if (question_num == BOOTH.election.questions.length -1)
    BOOTH.all_questions_seen = true;

  BOOTH.show_progress('1');
  BOOTH.show($('#question_div')).processTemplate({'question_num' : question_num,
                      'last_question_num' : BOOTH.election.questions.length - 1,
                      'question' : BOOTH.election.questions[question_num], 'show_reviewall' : BOOTH.all_questions_seen,
		      'answer_ordering': BOOTH.election.question_answer_orderings[question_num]
                });

  // fake clicking through the answers, to trigger the disabling if need be
  // first we remove the answers array
  var answer_array = BOOTH.ballot.answers[question_num];
  BOOTH.ballot.answers[question_num] = [];

  // we should not set the dirty bit here, so we save it away
  var old_dirty = BOOTH.dirty[question_num];
  $(answer_array).each(function(i, ans) {
    BOOTH.click_checkbox_script(question_num, ans, true);
  });
  BOOTH.dirty[question_num] = old_dirty;
};



BOOTH.click_checkbox_script = function(question_num, answer_num) {
  document.forms['answer_form']['answer_'+question_num+'_'+answer_num].click();
};

BOOTH.click_checkbox = function(question_num, answer_num, checked_p) {
  // keep track of dirty answers that need encrypting
  BOOTH.dirty[question_num] = true;

  if (checked_p) {
     // multiple click events shouldn't screw this up
     if ($(BOOTH.ballot.answers[question_num]).index(answer_num) == -1)
        BOOTH.ballot.answers[question_num].push(answer_num);

     $('#answer_label_' + question_num + "_" + answer_num).addClass('selected');
  } else {
     BOOTH.ballot.answers[question_num] = UTILS.array_remove_value(BOOTH.ballot.answers[question_num], answer_num);
     $('#answer_label_' + question_num + "_" + answer_num).removeClass('selected');
  }

  if (BOOTH.election.questions[question_num].max != null && BOOTH.ballot.answers[question_num].length >= BOOTH.election.questions[question_num].max) {
     // disable the other checkboxes
     $('.ballot_answer').each(function(i, checkbox) {
        if (!checkbox.checked)
            checkbox.disabled = true;
     });

     // do the warning only if the question allows more than one option, otherwise it's confusing
     if (BOOTH.election.questions[question_num].max > 1) {
        $('#warning_box').html("Maximum number of options selected.<br />To change your selection, please de-select a current selection first.");
     }
  } else {
     // enable the other checkboxes
     $('.ballot_answer').each(function(i, checkbox) {
       checkbox.disabled = false;
     });
     $('#warning_box').html("");
  }
};

    BOOTH.show_processing_before = function(str_to_execute) {
    $('#processing_div').html("<h3 align='center'>Processing...</h3>");
    BOOTH.show($('#processing_div'));

    // add a timeout so browsers like Safari actually display the processing message
    setTimeout(str_to_execute, 250);
};

BOOTH.show_encryption_message_before = function(func_to_execute) {
    BOOTH.show_progress('2');
    BOOTH.show($('#encrypting_div'));

    func_to_execute();
};

BOOTH.load_and_setup_election = function(election_url) {
    // the hash will be computed within the setup function call now
    $.get(election_url, function(raw_json) {
        // let's also get the metadata
        $.getJSON(election_url + "/meta", {}, function(election_metadata) {
          BOOTH.election_metadata = election_metadata;
          BOOTH.setup_election(raw_json, election_metadata);
          BOOTH.show_election();
          BOOTH.election_url = election_url;
        });
    });


    if (USE_SJCL) {
      // get more randomness from server
      $.get(election_url + "/get-randomness", {}, function(raw_json) {
        sjcl.random.addEntropy(JSON.parse(raw_json).randomness);
      });
    }
};

BOOTH.hide_progress = function() {
  $('#progress_div').hide();
};

BOOTH.show_progress = function(step_num) {
    $('#progress_div').show();
    $(['1','2','3','4']).each(function(n, step) {
        if (step == step_num)
            $('#progress_' + step).attr('class', 'selected');
        else
            $('#progress_' + step).attr('class', 'unselected');
    });
};

BOOTH.so_lets_go = function () {
    BOOTH.hide_progress();

    BOOTH.setup_templates();

    // election URL
    var election_url = $.query.get('election_url');
    BOOTH.load_and_setup_election(election_url);
};

BOOTH.nojava = function() {
  // in the case of Chrome, we get here when Java
  // is disabled, instead of detecting the problem earlier.
  // because navigator.javaEnabled() still returns true.
  // $('#election_div').hide();
  // $('#error_div').show();
    USE_SJCL = true;
    sjcl.random.startCollectors();
    BigInt.setup(BOOTH.so_lets_go);
};
    
BOOTH.ready_p = false;

$(document).ready(function() {
    if (USE_SJCL) {
      sjcl.random.startCollectors();
    }

    // we're asynchronous if we have SJCL and Worker
    BOOTH.synchronous = !(USE_SJCL && window.Worker);

    // we do in the browser only if it's asynchronous
    BigInt.in_browser = !BOOTH.synchronous;

    // set up dummy bigint for fast parsing and serialization
    if (!BigInt.in_browser)
      BigInt = BigIntDummy;

    BigInt.setup(BOOTH.so_lets_go, BOOTH.nojava);
});


BOOTH.check_encryption_status = function() {
  var progress = BOOTH.progress.progress();
  if (progress == "" || progress == null)
    progress = "0";

  $('#percent_done').html(progress);
};

BOOTH._after_ballot_encryption = function() {
    // if already serialized, use that, otherwise serialize
    BOOTH.encrypted_vote_json = BOOTH.encrypted_ballot_serialized || JSON.stringify(BOOTH.encrypted_ballot.toJSONObject());

    var do_hash = function() {
       BOOTH.encrypted_ballot_hash = b64_sha256(BOOTH.encrypted_vote_json); // BOOTH.encrypted_ballot.get_hash();
       window.setTimeout(show_cast, 0);
    };

    var show_cast = function() {
      $('#seal_div').processTemplate({'cast_url': BOOTH.election.cast_url,
        'encrypted_vote_json': BOOTH.encrypted_vote_json,
        'encrypted_vote_hash' : BOOTH.encrypted_ballot_hash,
        'election_uuid' : BOOTH.election.uuid,
        'election_hash' : BOOTH.election_hash,
        'election': BOOTH.election,
        'election_metadata': BOOTH.election_metadata,
        'questions' : BOOTH.election.questions,
        'choices' : BALLOT.pretty_choices(BOOTH.election, BOOTH.ballot)});
      BOOTH.show($('#seal_div'));
      BOOTH.encrypted_vote_json = null;
    };

    window.setTimeout(do_hash, 0);
};

BOOTH.total_cycles_waited = 0;

// wait for all workers to be done
BOOTH.wait_for_ciphertexts = function() {
    BOOTH.total_cycles_waited += 1;

    var answers_done = _.reject(BOOTH.encrypted_answers, _.isNull);
    var percentage_done = Math.round((100 * answers_done.length) / BOOTH.encrypted_answers.length);

    if (BOOTH.total_cycles_waited > 250) {
      alert('there appears to be a problem with the encryption process.\nPlease email help@heliosvoting.org and indicate that your encryption process froze at ' + percentage_done + '%');
      return;
    }

        if (percentage_done < 100) {
      setTimeout(BOOTH.wait_for_ciphertexts, 500);
      $('#percent_done').html(percentage_done + '');
      return;
    }

    BOOTH.encrypted_ballot = HELIOS.EncryptedVote.fromEncryptedAnswers(BOOTH.election, BOOTH.encrypted_answers);

    BOOTH._after_ballot_encryption();
};

BOOTH.seal_ballot_raw = function() {
    if (BOOTH.synchronous) {
      BOOTH.progress = new UTILS.PROGRESS();
      var progress_interval = setInterval("BOOTH.check_encryption_status()", 500);
      BOOTH.encrypted_ballot = new HELIOS.EncryptedVote(BOOTH.election, BOOTH.ballot.answers, BOOTH.progress);
      clearInterval(progress_interval);
      BOOTH._after_ballot_encryption();
    } else {
      BOOTH.total_cycles_waited = 0;
      BOOTH.wait_for_ciphertexts();
    }
};

BOOTH.request_ballot_encryption = function() {
    $.post(BOOTH.election_url + "/encrypt-ballot", {'answers_json': $.toJSON(BOOTH.ballot.answers)}, function(result) {
      //BOOTH.encrypted_ballot = HELIOS.EncryptedVote.fromJSONObject($.secureEvalJSON(result), BOOTH.election);
      // rather than deserialize and reserialize, which is inherently slow on browsers
      // that already need to do network requests, just remove the plaintexts

      BOOTH.encrypted_ballot_with_plaintexts_serialized = result;
      var ballot_json_obj = $.secureEvalJSON(BOOTH.encrypted_ballot_with_plaintexts_serialized);
      var answers = ballot_json_obj.answers;
      for (var i=0; i<answers.length; i++) {
         delete answers[i]['answer'];
         delete answers[i]['randomness'];
      }

      BOOTH.encrypted_ballot_serialized = JSON.stringify(ballot_json_obj);

      window.setTimeout(BOOTH._after_ballot_encryption, 0);
    });
};

BOOTH.seal_ballot = function() {
    BOOTH.show_progress('2');

    // if we don't have the ability to do crypto in the browser,
    // we use the server
    if (!BigInt.in_browser) {
      BOOTH.show_encryption_message_before(BOOTH.request_ballot_encryption, true);
    } else {
      BOOTH.show_encryption_message_before(BOOTH.seal_ballot_raw, true);
      $('#percent_done_container').show();
    }
};

BOOTH.audit_ballot = function() {
    BOOTH.audit_trail = BOOTH.encrypted_ballot_with_plaintexts_serialized || $.toJSON(BOOTH.encrypted_ballot.get_audit_trail());

    BOOTH.show($('#audit_div')).processTemplate({'audit_trail' : BOOTH.audit_trail, 'election_url' : BOOTH.election_url});
};

BOOTH.post_audited_ballot = function() {
  $.post(BOOTH.election_url + "/post-audited-ballot", {'audited_ballot': BOOTH.audit_trail}, function(result) {
    alert('This audited ballot has been posted.\nRemember, this vote will only be used for auditing and will not be tallied.\nClick "back to voting" and cast a new ballot to make sure your vote counts.');
  });
};

BOOTH.cast_ballot = function() {
        // show progress spinner
    $('#loading_div').show();
    $('#proceed_button').attr('disabled', 'disabled');

    // at this point, we delete the plaintexts by resetting the ballot
    BOOTH.setup_ballot(BOOTH.election);

    // clear the plaintext from the encrypted
    if (BOOTH.encrypted_ballot)
       BOOTH.encrypted_ballot.clearPlaintexts();

    BOOTH.encrypted_ballot_serialized = null;
    BOOTH.encrypted_ballot_with_plaintexts_serialized = null;

    // remove audit trail
    BOOTH.audit_trail = null;

    // we're ready to leave the site
    BOOTH.started_p = false;

    // submit the form
    $('#send_ballot_form').submit();
};

BOOTH.show_receipt = function() {
    UTILS.open_window_with_content("Your smart ballot tracker for " + BOOTH.election.name + ": " + BOOTH.encrypted_ballot_hash);
};

BOOTH.do_done = function() {
  BOOTH.started_p = false;
};

</script>
<div id="page">
  <div id="progress_div" style="display:none; width: 500px; margin:auto;">
      <table width="100%">
          <tr><td id="progress_1">(1) Select</td><td id="progress_2">(2) Review</td><td id="progress_3">(3) Submit</td></tr>
      </table>
  </div>
  <div id="election_div" class="panel">
    <h3>Checking capabilities and loading election booth...</h3>
    <div align="center"><img src="loading.gif" /><br />This may take up to 10 seconds</div>
  </div>

  <div id="error_div" class="panel" style="display: none;">
    <h3>There's a problem</h3>
    <p>
      It appears that your browser does not have Java enabled. Helios needs Java to perform encryption within the browser.
    </p>
    <p>
      You may be able to install Java by visiting <a target="_new" href="http://java.com">java.com</a>.
    </p>
  </div>

  <div id="question_div" class="panel">
  </div>

  <div id="processing_div" class="panel" style="display:none;">
      <h3 align="center">Processing....</h3>
  </div>

  <div id="encrypting_div" class="panel" style="display:none;">
      <h3 align="center">Helios is now encrypting your ballot<br />
          <img src="encrypting.gif" /> <span style="font-size:0.7em; display:none;" id="percent_done_container">(<span id="percent_done">0</span>%)</span></h3>

      <p align="center"><b>This may take up to two minutes.</b>
  </div>

  <div id="seal_div" class="panel">
  </div>
    
  <div id="audit_div" class="panel">
  </div>

</div>

<br clear="both" />
</div>
<div id="footer">&nbsp;</div>
</div>
<div id="applet_div">
</div>
</body>
</html>

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