Going home
This commit is contained in:
Rumperuu
parent
77508479b4
commit
89533a54b1
9 changed files with 256 additions and 151 deletions
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@ -208,6 +208,11 @@ class Ballot(models.Model):
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cast = models.BooleanField(default=False)
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class EncBallot(models.Model):
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handle = models.CharField(primary_key=True, default=uuid.uuid4, editable=False, max_length=255)
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ballot = models.CharField(max_length=4096)
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# Implements the new binary encoding scheme
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class EncryptedVote(models.Model):
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ballot = models.ForeignKey(Ballot, on_delete=models.CASCADE, related_name="encrypted_vote")
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@ -20,5 +20,6 @@ urlpatterns = [
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url(r'^(?P<event_id>[0-9a-f-]+)/prepare/$', views.event_trustee_setup, name='prepare-event'),
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url(r'^(?P<event_id>[0-9a-f-]+)/poll/(?P<poll_id>[0-9a-f-]+)/vote/$', views.event_vote, name='event-vote'),
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url(r'^(?P<event_id>[0-9a-f-]+)/create/poll/$', login_required(views.manage_questions), name='create-poll'),
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url(r'^(?P<event_id>[0-9a-f-]+)/poll/(?P<poll_id>[0-9a-f-]+)/edit$', login_required(views.edit_poll), name='edit-poll')
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url(r'^(?P<event_id>[0-9a-f-]+)/poll/(?P<poll_id>[0-9a-f-]+)/edit$', login_required(views.edit_poll), name='edit-poll'),
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url(r'^audit/$', views.vote_audit, name='vote_audit')
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]
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@ -1,6 +1,8 @@
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import urllib
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import urllib2
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import json
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import logging
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import base64
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from django.contrib import messages
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from django.http import HttpResponseRedirect, HttpResponse, Http404
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@ -11,7 +13,7 @@ from django.views import generic
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from django.conf import settings
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from .forms import PollForm, OptionFormset, VoteForm, EventSetupForm, EventEditForm
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from .models import Event, Poll, Ballot, EncryptedVote, TrusteeKey, PartialBallotDecryption, CombinedBallot, VoteFragment
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from .models import Event, Poll, Ballot, EncBallot, EncryptedVote, TrusteeKey, PartialBallotDecryption, CombinedBallot, VoteFragment
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from allauthdemo.auth.models import DemoUser
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from .tasks import email_trustees_prep, update_EID, generate_combpk, event_ended, create_ballots
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@ -110,6 +112,15 @@ def edit_poll(request, event_id, poll_id):
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return HttpResponseRedirect(reverse('polls:event-polls', args=[poll.event_id]))
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def vote_audit(request):
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encryptedBallot = get_object_or_404(EncBallot, handle=''+urllib.quote_plus(request.GET.get('handle', None)))
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return render(request, "polls/vote_audit.html",
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{
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"ballot": encryptedBallot.ballot
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})
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def event_vote(request, event_id, poll_id):
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event = get_object_or_404(Event, pk=event_id)
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@ -172,10 +183,21 @@ def event_vote(request, event_id, poll_id):
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cant_vote_reason = "The event either isn't ready for voting or it has expired and therefore you cannot vote."
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if request.method == "POST":
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data = json.loads(request.POST.lists()[0][0])
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ballot_json = data['ballot']
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ballot_json = json.loads(request.POST.get('ballot'))
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encrypted_votes_json = ballot_json['encryptedVotes']
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enc_ballot_json = request.POST.get('encBallot')
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handle_json = request.POST.get('handle')
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# Adds or replaces the encrypted un-submitted ballot to the database for the auditor app to pick up later
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if EncBallot.objects.filter(handle=handle_json).exists():
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b = EncBallot.objects.get(handle=handle_json)
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b.ballot = ballot_json
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b.save()
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else:
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b = EncBallot(handle=handle_json, ballot=enc_ballot_json)
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b.save()
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# Before storing the encrypted votes, we need the voter's ballot
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ballot, created = Ballot.objects.get_or_create(voter=email_key[0].user, poll=poll)
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EncryptedVote.objects.filter(ballot=ballot).delete()
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@ -11,16 +11,16 @@
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<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
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<script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.10.6/moment.min.js"></script>
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<script src="//cdnjs.cloudflare.com/ajax/libs/bootstrap-datetimepicker/4.17.37/js/bootstrap-datetimepicker.min.js"></script>
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<script src="https://bitwiseshiftleft.github.io/sjcl/sjcl.js"></script>
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<script src='https://www.google.com/recaptcha/api.js'></script>
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<script
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src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js"
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integrity="sha256-VazP97ZCwtekAsvgPBSUwPFKdrwD3unUfSGVYrahUqU="
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crossorigin="anonymous"></script>
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<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js" integrity="sha256-VazP97ZCwtekAsvgPBSUwPFKdrwD3unUfSGVYrahUqU=" crossorigin="anonymous"></script>
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<script src="{% static 'js/papaparse.min.js' %}" type="text/javascript"></script>
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<script src="{% static 'js/qrcode.min.js' %}" type="text/javascript"></script>
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<script src="{% static 'js/create-event-poll.js' %}" type="text/javascript"></script>
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<script src="{% static 'js/decrypt_event.js' %}" type="text/javascript"></script>
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<script src="{% static 'js/event_vote.js' %}" type="text/javascript"></script>
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<script src="{% static 'js/vote_audit.js' %}" type="text/javascript"></script>
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<script src="{% static 'js/encrypt.js' %}" type="text/javascript"></script>
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<script type="text/javascript" src="{% static 'js/core/rand.js' %}"></script>
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@ -53,6 +53,7 @@
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</span>
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<!-- Poll Voting Section -->
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<p id="poll-num" hidden>{{ poll_num}}</p>
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<h3>Poll {{ poll_num }} of {{ poll_count }}: {{object.question_text}}</h3>
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<hr/>
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@ -124,7 +125,7 @@
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</div>
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</div>
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<div class="modal-footer">
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<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
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<button id="close-button" type="button" class="btn btn-danger" data-dismiss="modal">Close without submitting vote</button>
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</div>
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</div>
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18
allauthdemo/templates/polls/vote_audit.html
Normal file
18
allauthdemo/templates/polls/vote_audit.html
Normal file
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@ -0,0 +1,18 @@
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{% extends "bases/bootstrap-with-nav.html" %}
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{% load staticfiles %}
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{% load bootstrap3 %}
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{% block content %}
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<input id="SK" value="temporary" type="text"/>
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<button id="begin-test">Verify Ballot</button>
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<br>
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<br>
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<label for="ballot">AES-encrypted ballot from server</label>
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<pre id="ballot">{{ ballot }}</pre>
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<label for="ballot-content">Decrypted ballot</label>
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<pre id="ballot-content"></pre>
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<label for="ballot">Ballot encoding</label>
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<pre id="ballot-result"></pre>
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{% endblock %}
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@ -118,7 +118,8 @@ encrypt=function(params,PK, m){
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return{
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C1:C1,
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C2:C2
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C2:C2,
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r:r
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}
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}
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@ -80,23 +80,22 @@ function isVotingInputValid() {
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return valid;
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}
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// Generates a blank vote as a string using the binary encoding scheme
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function genBlankVote() {
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var vote = "";
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for(var i = 0; i < OPTION_COUNT; i++) {
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vote += "0";
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if (i !== (OPTION_COUNT - 1)) {
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vote += ",";
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}
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}
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return vote;
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}
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var progressBar = document.getElementById("progress-bar");
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$('#gen-ballots-btn').click(function() {
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// Ensure that the user selections are valid
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if(isVotingInputValid()) {
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// Hide the button
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$(this).toggleClass('hidden');
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// Inject the description progress bar which can then be updated by the encrypt btn
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$('#progress-bar-description').toggleClass('hidden');
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$('#progress-bar-container').toggleClass('hidden');
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setTimeout(generateBallots, 25);
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}
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});
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// Based on the user's vote in the current poll, this generates a ballot which
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// does not leak information about how many options the user has selected
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function generateBallot() {
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@ -156,16 +155,20 @@ function generateBallot() {
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unencryptedVote.split(',').forEach(function(fragment) {
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var cipher = encrypt(params, pk, parseInt(fragment));
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// Store C1 and C2 from the cipher in the fragment
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// Store C1, C2 and r from the cipher in the fragment
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var c1Bytes = [];
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cipher.C1.toBytes(c1Bytes);
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var c2Bytes = [];
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cipher.C2.toBytes(c2Bytes);
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var rBytes = [];
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cipher.r.toBytes(rBytes);
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encFragments.push({
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C1 : c1Bytes.toString(),
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C2 : c2Bytes.toString()
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C2 : c2Bytes.toString(),
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r : rBytes.toString()
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});
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});
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@ -180,29 +183,19 @@ function generateBallot() {
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};
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}
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$('#gen-ballots-btn').click(function() {
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// Ensure that the user selections are valid
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if(isVotingInputValid()) {
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// Hide the button
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$(this).toggleClass('hidden');
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// Generates a blank vote as a string using the binary encoding scheme
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function genBlankVote() {
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var vote = "";
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// Inject the description progress bar which can then be updated by the encrypt btn
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$('#progress-bar-description').toggleClass('hidden');
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$('#progress-bar-container').toggleClass('hidden');
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for(var i = 0; i < OPTION_COUNT; i++) {
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vote += "0";
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setTimeout(generateBallotsAndShowUsr, 25);
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}
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});
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function voteSuccessfullyReceived() {
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let titleTxt = 'Vote Successfully Received';
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let bodyText = "Thank you for voting!";
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if(POLL_NUM !== POLL_COUNT) {
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bodyText += " You can vote on the next poll by closing down this dialog and clicking 'Next Poll'.";
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if (i !== (OPTION_COUNT - 1)) {
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vote += ",";
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}
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}
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showDialogWithText(titleTxt, bodyText);
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return vote;
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}
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var CSRF = $( "input[name='csrfmiddlewaretoken']" ).val();
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@ -211,25 +204,6 @@ function csrfSafeMethod(method) {
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return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
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}
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function sendBallotToServer(selection, altHash) {
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$.ajaxSetup({
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beforeSend: function(xhr, settings) {
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if (!csrfSafeMethod(settings.type) && !this.crossDomain) {
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xhr.setRequestHeader("X-CSRFToken", CSRF);
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}
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}
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});
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$.ajax({
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type : "POST",
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url : window.location,
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data : JSON.stringify({ ballot: selection}),
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success : function(){
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onAfterBallotSend(altHash);
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}
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});
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}
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var bytestostring = function(b) {
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var s = "";
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var len = b.length;
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@ -272,63 +246,24 @@ function SHA256Hash(bytes, toStr) {
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}
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}
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// Called once the ballot has been sent to the back-end and dialog has closed
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function onAfterBallotSend(altHash) {
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let titleText = 'Vote Successfully Received';
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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.";
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function generateBallots() {
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// Generate Ballot A and Ballot B to be displayed to the user
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// This fn starts the process
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var ballotA = generateBallot();
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if(POLL_NUM !== POLL_COUNT) {
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bodyText += " You can vote on the next poll by closing down this dialog and clicking 'Next Poll'.";
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}
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// Update the progress bar once the generation has completed
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progressBar.setAttribute("style", "width: 50%;");
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// With one ballot selected, we can display a QR code of the voter's copy
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var modalDialog = $('#modalDialog');
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var title = modalDialog.find('.modal-title');
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var body = modalDialog.find('.modal-body');
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title.text(titleText);
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body.empty();
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// This delay allows the execution thread to update the above CSS on the progress bar
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setTimeout(function () {
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var ballotB = generateBallot();
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progressBar.setAttribute("style", "width: 100%;");
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var p = document.createElement("p");
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p.innerHTML = bodyText;
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body.append(p);
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// Generate the body of the dialog which displays the unselected ballot QR code and hash
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var choiceGroupDiv = document.createElement('div');
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choiceGroupDiv.setAttribute('class', 'choice-group');
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var QRCodeImg = document.createElement('img');
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QRCodeImg.setAttribute('class', 'QR-code');
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new QRCode(QRCodeImg, altHash);
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choiceGroupDiv.append(QRCodeImg);
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// ----------------------------------------------
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var hashGroupDiv = document.createElement('div');
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var br = document.createElement('br');
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hashGroupDiv.append( br );
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var hash = document.createElement("span");
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hash.innerHTML = "Hash: " + altHash;
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hashGroupDiv.append( hash );
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// -----------------------------------------------
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body.append(choiceGroupDiv);
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body.append(hashGroupDiv);
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modalDialog.modal('show');
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showFirstQRCode(ballotA, ballotB);
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}, 150);
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}
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function processBallotSelection(selection, selectionHash, alt, altHash) {
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// Dispatch the ballot to the server
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sendBallotToServer(selection, altHash);
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// Call the successfn currently with the selection hash but this may not be needed
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//successFn(alt, altHash);
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}
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function showBallotChoiceDialog(ballotA, ballotB) {
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function showFirstQRCode(ballotA, ballotB) {
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var ballots = new Array(ballotA, ballotB);
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var ballotHashes = new Array(2);
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@ -336,28 +271,18 @@ function showBallotChoiceDialog(ballotA, ballotB) {
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for (let i = 0; i <= 1; i++)
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ballotHashes[i] = SHA256Hash(stringtobytes(JSON.stringify(ballots[i])), true);
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// With the ballots and their hashes generated, we can display the ballot choice dialog
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// With the ballots and their hashes generated, we can display the QR code of both hashes
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var modalDialog = $('#modalDialog');
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var title = modalDialog.find('.modal-title');
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var body = modalDialog.find('.modal-body');
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var footer = modalDialog.find('.modal-footer');
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body.empty();
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title.text('Please Select a Ballot');
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title.text('Please Scan this QR Code');
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// Generate the body of the dialog which consists of a button for A and for B as well as their hashes
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var choiceGroupDiv = document.createElement('div');
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choiceGroupDiv.setAttribute('class', 'choice-group');
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var btnChoiceA = document.createElement('a');
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btnChoiceA.setAttribute('id', 'choice-A');
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btnChoiceA.setAttribute('class', 'btn btn-sq btn-primary');
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btnChoiceA.innerHTML = 'A';
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choiceGroupDiv.append(btnChoiceA);
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var btnChoiceB = document.createElement('a');
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btnChoiceB.setAttribute('id', 'choice-B');
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btnChoiceB.setAttribute('class', 'btn btn-sq btn-warning choice');
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btnChoiceB.innerHTML = 'B';
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choiceGroupDiv.append(btnChoiceB);
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var QRCodeImg = document.createElement('img');
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QRCodeImg.setAttribute('class', 'QR-code');
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new QRCode(QRCodeImg, ballotHashes[0] + ';' + ballotHashes[1]);
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// ----------------------------------------------
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@ -378,38 +303,153 @@ function showBallotChoiceDialog(ballotA, ballotB) {
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// -----------------------------------------------
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body.append(choiceGroupDiv);
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body.append(QRCodeImg);
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body.append(hashGroupDiv);
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var closeButton = $('close-button');
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closeButton.removeClass('btn-success');
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closeButton.addClass('btn-danger');
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closeButton.text("Close without submitting vote");
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var nextButton = document.createElement('button');
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nextButton.setAttribute('type', 'button');
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nextButton.setAttribute('id', 'next-button');
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nextButton.setAttribute('class', 'btn btn-default');
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nextButton.innerHTML = "Next";
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footer.prepend(nextButton);
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modalDialog.modal('show');
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$('#next-button').click(function(e) {
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showBallotChoiceDialog(ballots);
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});
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}
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function showBallotChoiceDialog(ballots) {
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// Display the ballot choice dialog
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var modalDialog = $('#modalDialog');
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var title = modalDialog.find('.modal-title');
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var body = modalDialog.find('.modal-body');
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body.empty();
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title.text('Please Select a Ballot');
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// Generate the body of the dialog which consists of a button for A and for B
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var choiceGroupDiv = document.createElement('div');
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choiceGroupDiv.setAttribute('class', 'choice-group');
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var btnChoiceA = document.createElement('a');
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btnChoiceA.setAttribute('id', 'choice-A');
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btnChoiceA.setAttribute('class', 'btn btn-sq btn-primary');
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btnChoiceA.innerHTML = 'A';
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choiceGroupDiv.append(btnChoiceA);
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|
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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
17
static/js/vote_audit.js
Normal 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);
|
||||
})
|
||||
});
|
||||
Reference in a new issue