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This commit is contained in:
Rumperuu 2018-08-16 22:17:16 +01:00
parent 77508479b4
commit 89533a54b1
9 changed files with 256 additions and 151 deletions
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3
static/js/demos2-booth.js
View file

@ -118,7 +118,8 @@ encrypt=function(params,PK, m){
return{
C1:C1,
C2:C2
C2:C2,
r:r
}
}

322
static/js/event_vote.js
View file

@ -80,23 +80,22 @@ function isVotingInputValid() {
return valid;
}
// Generates a blank vote as a string using the binary encoding scheme
function genBlankVote() {
var vote = "";
for(var i = 0; i < OPTION_COUNT; i++) {
vote += "0";
if (i !== (OPTION_COUNT - 1)) {
vote += ",";
}
}
return vote;
}
var progressBar = document.getElementById("progress-bar");
$('#gen-ballots-btn').click(function() {
// Ensure that the user selections are valid
if(isVotingInputValid()) {
// Hide the button
$(this).toggleClass('hidden');
// Inject the description progress bar which can then be updated by the encrypt btn
$('#progress-bar-description').toggleClass('hidden');
$('#progress-bar-container').toggleClass('hidden');
setTimeout(generateBallots, 25);
}
});
// Based on the user's vote in the current poll, this generates a ballot which
// does not leak information about how many options the user has selected
function generateBallot() {
@ -156,16 +155,20 @@ function generateBallot() {
unencryptedVote.split(',').forEach(function(fragment) {
var cipher = encrypt(params, pk, parseInt(fragment));
// Store C1 and C2 from the cipher in the fragment
// Store C1, C2 and r from the cipher in the fragment
var c1Bytes = [];
cipher.C1.toBytes(c1Bytes);
var c2Bytes = [];
cipher.C2.toBytes(c2Bytes);
var rBytes = [];
cipher.r.toBytes(rBytes);
encFragments.push({
C1 : c1Bytes.toString(),
C2 : c2Bytes.toString()
C2 : c2Bytes.toString(),
r : rBytes.toString()
});
});
@ -180,29 +183,19 @@ function generateBallot() {
};
}
$('#gen-ballots-btn').click(function() {
// Ensure that the user selections are valid
if(isVotingInputValid()) {
// Hide the button
$(this).toggleClass('hidden');
// Generates a blank vote as a string using the binary encoding scheme
function genBlankVote() {
var vote = "";
// Inject the description progress bar which can then be updated by the encrypt btn
$('#progress-bar-description').toggleClass('hidden');
$('#progress-bar-container').toggleClass('hidden');
for(var i = 0; i < OPTION_COUNT; i++) {
vote += "0";
setTimeout(generateBallotsAndShowUsr, 25);
}
});
function voteSuccessfullyReceived() {
let titleTxt = 'Vote Successfully Received';
let bodyText = "Thank you for voting!";
if(POLL_NUM !== POLL_COUNT) {
bodyText += " You can vote on the next poll by closing down this dialog and clicking 'Next Poll'.";
if (i !== (OPTION_COUNT - 1)) {
vote += ",";
}
}
showDialogWithText(titleTxt, bodyText);
return vote;
}
var CSRF = $( "input[name='csrfmiddlewaretoken']" ).val();
@ -211,25 +204,6 @@ function csrfSafeMethod(method) {
return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
}
function sendBallotToServer(selection, altHash) {
$.ajaxSetup({
beforeSend: function(xhr, settings) {
if (!csrfSafeMethod(settings.type) && !this.crossDomain) {
xhr.setRequestHeader("X-CSRFToken", CSRF);
}
}
});
$.ajax({
type : "POST",
url : window.location,
data : JSON.stringify({ ballot: selection}),
success : function(){
onAfterBallotSend(altHash);
}
});
}
var bytestostring = function(b) {
var s = "";
var len = b.length;
@ -272,63 +246,24 @@ function SHA256Hash(bytes, toStr) {
}
}
// Called once the ballot has been sent to the back-end and dialog has closed
function onAfterBallotSend(altHash) {
let titleText = 'Vote Successfully Received';
let bodyText = "Thank you for voting! This is your copy of your ballot - make sure to save it onto your phone before closing this window.";
function generateBallots() {
// Generate Ballot A and Ballot B to be displayed to the user
// This fn starts the process
var ballotA = generateBallot();
if(POLL_NUM !== POLL_COUNT) {
bodyText += " You can vote on the next poll by closing down this dialog and clicking 'Next Poll'.";
}
// Update the progress bar once the generation has completed
progressBar.setAttribute("style", "width: 50%;");
// With one ballot selected, we can display a QR code of the voter's copy
var modalDialog = $('#modalDialog');
var title = modalDialog.find('.modal-title');
var body = modalDialog.find('.modal-body');
title.text(titleText);
body.empty();
// This delay allows the execution thread to update the above CSS on the progress bar
setTimeout(function () {
var ballotB = generateBallot();
progressBar.setAttribute("style", "width: 100%;");
var p = document.createElement("p");
p.innerHTML = bodyText;
body.append(p);
// Generate the body of the dialog which displays the unselected ballot QR code and hash
var choiceGroupDiv = document.createElement('div');
choiceGroupDiv.setAttribute('class', 'choice-group');
var QRCodeImg = document.createElement('img');
QRCodeImg.setAttribute('class', 'QR-code');
new QRCode(QRCodeImg, altHash);
choiceGroupDiv.append(QRCodeImg);
// ----------------------------------------------
var hashGroupDiv = document.createElement('div');
var br = document.createElement('br');
hashGroupDiv.append( br );
var hash = document.createElement("span");
hash.innerHTML = "Hash: " + altHash;
hashGroupDiv.append( hash );
// -----------------------------------------------
body.append(choiceGroupDiv);
body.append(hashGroupDiv);
modalDialog.modal('show');
showFirstQRCode(ballotA, ballotB);
}, 150);
}
function processBallotSelection(selection, selectionHash, alt, altHash) {
// Dispatch the ballot to the server
sendBallotToServer(selection, altHash);
// Call the successfn currently with the selection hash but this may not be needed
//successFn(alt, altHash);
}
function showBallotChoiceDialog(ballotA, ballotB) {
function showFirstQRCode(ballotA, ballotB) {
var ballots = new Array(ballotA, ballotB);
var ballotHashes = new Array(2);
@ -336,28 +271,18 @@ function showBallotChoiceDialog(ballotA, ballotB) {
for (let i = 0; i <= 1; i++)
ballotHashes[i] = SHA256Hash(stringtobytes(JSON.stringify(ballots[i])), true);
// With the ballots and their hashes generated, we can display the ballot choice dialog
// With the ballots and their hashes generated, we can display the QR code of both hashes
var modalDialog = $('#modalDialog');
var title = modalDialog.find('.modal-title');
var body = modalDialog.find('.modal-body');
var footer = modalDialog.find('.modal-footer');
body.empty();
title.text('Please Select a Ballot');
title.text('Please Scan this QR Code');
// Generate the body of the dialog which consists of a button for A and for B as well as their hashes
var choiceGroupDiv = document.createElement('div');
choiceGroupDiv.setAttribute('class', 'choice-group');
var btnChoiceA = document.createElement('a');
btnChoiceA.setAttribute('id', 'choice-A');
btnChoiceA.setAttribute('class', 'btn btn-sq btn-primary');
btnChoiceA.innerHTML = 'A';
choiceGroupDiv.append(btnChoiceA);
var btnChoiceB = document.createElement('a');
btnChoiceB.setAttribute('id', 'choice-B');
btnChoiceB.setAttribute('class', 'btn btn-sq btn-warning choice');
btnChoiceB.innerHTML = 'B';
choiceGroupDiv.append(btnChoiceB);
var QRCodeImg = document.createElement('img');
QRCodeImg.setAttribute('class', 'QR-code');
new QRCode(QRCodeImg, ballotHashes[0] + ';' + ballotHashes[1]);
// ----------------------------------------------
@ -378,38 +303,153 @@ function showBallotChoiceDialog(ballotA, ballotB) {
// -----------------------------------------------
body.append(choiceGroupDiv);
body.append(QRCodeImg);
body.append(hashGroupDiv);
var closeButton = $('close-button');
closeButton.removeClass('btn-success');
closeButton.addClass('btn-danger');
closeButton.text("Close without submitting vote");
var nextButton = document.createElement('button');
nextButton.setAttribute('type', 'button');
nextButton.setAttribute('id', 'next-button');
nextButton.setAttribute('class', 'btn btn-default');
nextButton.innerHTML = "Next";
footer.prepend(nextButton);
modalDialog.modal('show');
$('#next-button').click(function(e) {
showBallotChoiceDialog(ballots);
});
}
function showBallotChoiceDialog(ballots) {
// Display the ballot choice dialog
var modalDialog = $('#modalDialog');
var title = modalDialog.find('.modal-title');
var body = modalDialog.find('.modal-body');
body.empty();
title.text('Please Select a Ballot');
// Generate the body of the dialog which consists of a button for A and for B
var choiceGroupDiv = document.createElement('div');
choiceGroupDiv.setAttribute('class', 'choice-group');
var btnChoiceA = document.createElement('a');
btnChoiceA.setAttribute('id', 'choice-A');
btnChoiceA.setAttribute('class', 'btn btn-sq btn-primary');
btnChoiceA.innerHTML = 'A';
choiceGroupDiv.append(btnChoiceA);
var btnChoiceB = document.createElement('a');
btnChoiceB.setAttribute('id', 'choice-B');
btnChoiceB.setAttribute('class', 'btn btn-sq btn-warning choice');
btnChoiceB.innerHTML = 'B';
choiceGroupDiv.append(btnChoiceB);
body.append(choiceGroupDiv);
modalDialog.modal('show');
// Register callback functions for the selection of either A or B
$('#choice-A').click(function(e) {
processBallotSelection(ballots[0], ballotHashes[0], ballots[1], ballotHashes[1]);
sendBallotsToServer(ballots[0], ballots[1]);
});
$('#choice-B').click(function(e) {
processBallotSelection(ballots[1], ballotHashes[1], ballots[0], ballotHashes[0]);
sendBallotsToServer(ballots[1], ballots[0]);
});
}
function generateBallotB(ballotA) {
var ballotB = generateBallot();
progressBar.setAttribute("style", "width: 100%;");
function sendBallotsToServer(selection, alt) {
$.ajaxSetup({
beforeSend: function(xhr, settings) {
if (!csrfSafeMethod(settings.type) && !this.crossDomain) {
xhr.setRequestHeader("X-CSRFToken", CSRF);
}
}
});
showBallotChoiceDialog(ballotA, ballotB);
// Elliptic curve cryptography params used for encryption of encrypted vote
// fragments
var ctx = new CTX("BN254CX");
var n = new ctx.BIG();
var g1 = new ctx.ECP();
var g2 = new ctx.ECP2();
var parameter = $('#event-param').val();
var tempParams = JSON.parse(JSON.parse(parameter).crypto);
//copying the values
n.copy(tempParams.n);
g1.copy(tempParams.g1);
g2.copy(tempParams.g2);
var params = {
n:n,
g1:g1,
g2:g2
};
var tempPK = JSON.parse($('#comb_pk').val());
var pk = new ctx.ECP(0);
pk.copy(tempPK.PK);
var voterID = window.location.search.slice(1).split(/=(.+)/)[1];//.slice(0, -2);
var eventID = window.location.href.split('/')[4];
var pollNum = $('#poll-num').text();
var ballotID = encodeURIComponent(btoa(JSON.stringify({voterID: voterID, eventID: eventID, pollNum: pollNum})));
var SK = "temporary";
var encAlt = sjcl.encrypt(SK, JSON.stringify(alt));
selection = JSON.stringify(selection);
$.ajax({
type : "POST",
url : window.location,
data : { handle: ballotID, encBallot: encAlt, ballot: selection },
success : function(){
onAfterBallotSend(ballotID, SK);
}
});
}
function generateBallotsAndShowUsr() {
// Generate Ballot A and Ballot B to be displayed to the user
// This fn starts the process
var ballotA = generateBallot();
// Called once the ballot has been sent to the back-end and dialog has closed
function onAfterBallotSend(ballotID, SK) {
let titleText = 'Vote Successfully Received';
let bodyText = "Thank you for voting! Your secret key is '"+SK+"'. Make sure to scan this QR code with your phone before closing this window.";
// Update the progress bar once the generation has completed
progressBar.setAttribute("style", "width: 50%;");
if(POLL_NUM !== POLL_COUNT) {
bodyText += " You can vote on the next poll by closing down this dialog and clicking 'Next Poll'.";
}
// This delay allows the execution thread to update the above CSS on the progress bar
setTimeout(function () {
generateBallotB(ballotA);
}, 150);
// With one ballot selected, we can display a QR code of the ballot ID
var modalDialog = $('#modalDialog');
var title = modalDialog.find('.modal-title');
var body = modalDialog.find('.modal-body');
title.text(titleText);
body.empty();
var p = document.createElement("p");
p.innerHTML = bodyText;
body.append(p);
// Generate the body of the dialog which displays the unselected ballot QR code
var QRCodeImg = document.createElement('img');
QRCodeImg.setAttribute('class', 'QR-code');
new QRCode(QRCodeImg, ballotID);
body.append(QRCodeImg);
var closeButton = $('#close-button');
closeButton.removeClass('btn-danger');
closeButton.addClass('btn-success');
closeButton.text("Close");
modalDialog.modal('show');
}

17
static/js/vote_audit.js Normal file
View file

@ -0,0 +1,17 @@
$('#begin-test').click(function() {
var ballot = JSON.parse(sjcl.decrypt($('#SK').val(), $('#ballot').text()));
var votes = ballot['encryptedVotes'][0]['fragments'];
$('#ballot-content').text(JSON.stringify(votes));
var option = 0;
votes.forEach(function(cT) {
option++;
var encoding = "";
for (var i = 0; i < cT['C1'].length; i++) {
cipherText = "("+cT['C1']+","+cT['C2']+")";
var m = cT['C2'][i] / Math.pow(cT['C1'][i], cT['r'][i]);
encoding += (m) ? "1" : "0";
}
$('#ballot-result').text($('#ballot-result').text() + "\n\nOption "+option+": "+encoding);
})
});