Lancaster-University/DEMOS2
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Implemented full end-to-end encryption and decryption of an event using trustee public and secret keys. This required modification of the NodeJS crypto server to receive post data from the crypto_rpc py methods and for combining SKs together. Additionally, the new binary voting encoding scheme has been implemented for encryption and decryption of the event. General UI improvements have been made and as well as some other bug fixes

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vince0656 2018-07-07 09:52:47 +01:00
parent 0c354cd542
commit e33b91f852
23 changed files with 809 additions and 446 deletions
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72
allauthdemo/templates/bases/bootstrap-jquery.html
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@ -18,6 +18,7 @@
crossorigin="anonymous"></script>
<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/encrypt.js' %}" type="text/javascript"></script>
<script type="text/javascript" src="{% static 'js/core/rand.js' %}"></script>
@ -74,15 +75,19 @@
//new function
demosEncrypt.encryptAndSubmit = function() {
var ctx = new CTX("BN254CX"); //new context we can use
// 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 param = $('#event-param').val();
//console.log(param);
var parameter = $('#event-param').val();
var tempParams = JSON.parse(JSON.parse(parameter).crypto);
var tempParams = JSON.parse(param);
//copying the values
n.copy(tempParams.n);
g1.copy(tempParams.g1);
@ -92,26 +97,55 @@
n:n,
g1:g1,
g2:g2
}
var tempPK = JSON.parse($('#comb_pk').val());
};
var tempPK = JSON.parse($('#comb_pk').val());
var pk = new ctx.ECP(0);
pk.copy(tempPK.PK);
var answer = $('#poll-options').val();
console.log(answer);
var cipher = encrypt(params, pk, answer);
var c1Bytes = [];
cipher.C1.toBytes(c1Bytes);
var c2Bytes = [];
cipher.C2.toBytes(c2Bytes);
$('#id_cipher_text_c1').val(c1Bytes.toString());
$('#id_cipher_text_c2').val(c2Bytes.toString());
// 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();
}
};
//new function
@ -149,7 +183,7 @@
//new function
demosEncrypt.generateKeys = function() {
parameter = $("#event-param").val();
var parameter = $("#event-param").val();
var tempParams = JSON.parse(JSON.parse(parameter).crypto);
//the full objects need to be initalised as per the library, then copy the values we need into it
//I follow Bingsheng's code as to what objects are used in the parameter object