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Updated the voting and event decryption pages. On the voting page, added the ability to vote by selecting checkboxes instead of a drop down select menu. This adds flexibility at event creation to specify a wide range of min and max option selections for polls. On the event decryption page, SK validation was added based on the stored trustee PK as well as a dialog to display any validation errors. Most of the updates took place behind the scenes at the backend.

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vince0656 2018-07-13 17:19:35 +01:00
parent 3fd9173666
commit 745fdf06b1
10 changed files with 503 additions and 152 deletions
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108
allauthdemo/templates/bases/bootstrap-jquery.html
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@ -19,6 +19,7 @@
<script src="{% static 'js/papaparse.min.js' %}" type="text/javascript"></script>
<script src="{% static 'js/create-event-poll.js' %}" type="text/javascript"></script>
<script src="{% static 'js/decrypt_event.js' %}" type="text/javascript"></script>
<script src="{% static 'js/event_vote.js' %}" type="text/javascript"></script>
<script src="{% static 'js/encrypt.js' %}" type="text/javascript"></script>
<script type="text/javascript" src="{% static 'js/core/rand.js' %}"></script>
@ -64,113 +65,6 @@
}
/*
Code written with "New function" comments have
been totally or mostly re-implemented by Thomas Smith
*/
dropDownFragsNotZero = function(frags) {
var valid = false;
for(var i = 0; i < frags.length; i++) {
var frag = frags[i];
if(frag !== "0") {
valid = true;
break;
}
}
return valid;
};
//new function
demosEncrypt.encryptAndSubmit = function() {
// Drop down option selection validation
if(min_selections === 1 && max_selections === 1) {
var fragments = $('#poll-options').val().split(",");
if(!dropDownFragsNotZero(fragments)) {
alert("You have to select an option in order to vote.");
return;
}
} // TODO: Checkbox validation goes here
// Disable the enc and submit button to prevent fn from being called twice
$('#keygen-btn').prop("disabled", true);
// 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);
// Obtain the user's selection (their vote) and encrypt the fragments of the binary encoding
const selection = $('#poll-options').val();
const selectionFragments = selection.split(',');
var cipherForm = document.getElementById("cipher-form");
for(var i = 0; i < selectionFragments.length; i++) {
// Encrypt this fragment for the selection
var cipher = encrypt(params, pk, parseInt(selectionFragments[i]));
// Store C1 and C2 from the cipher in 2 arrays
var c1Bytes = [];
cipher.C1.toBytes(c1Bytes);
var c2Bytes = [];
cipher.C2.toBytes(c2Bytes);
// Inject hidden input controls into the form that represents a single ballot
var c1Input = document.createElement("input");
c1Input.setAttribute("type", "hidden");
c1Input.setAttribute("name", "cipher_c1_frag_" + i);
c1Input.setAttribute("value", c1Bytes.toString());
var c2Input = document.createElement("input");
c2Input.setAttribute("type", "hidden");
c2Input.setAttribute("name", "cipher_c2_frag_" + i);
c2Input.setAttribute("value", c2Bytes.toString());
cipherForm.appendChild(c1Input);
cipherForm.appendChild(c2Input);
}
// Inject a final input control into the form which specifies the number of fragments
// That make up an encrypted vote
var fragCountInput = document.createElement("input");
fragCountInput.setAttribute("type", "hidden");
fragCountInput.setAttribute("name", "vote_frag_count");
fragCountInput.setAttribute("value", "" + selectionFragments.length);
cipherForm.appendChild(fragCountInput);
// Submit the encrypted vote to the server
$('#cipher-form').submit();
};
function getBytes(arr) {
for(var i = 0; i < arr.length; i++) {
arr[i] = parseInt(arr[i]);