Public Keys and Secret Keys for Trustees are now Base64 encoded. I've tested this against 1 trustee and multiple trustees.

Node/index.js

@@ -10,6 +10,7 @@ Dependencies can be found in 'package.json' and installed using 'npm install'
 var port = 8080;
 
 var Buffer = require('buffer').Buffer;
+var atob = require("atob");
 var CTX = require('milagro-crypto-js');
 
 var express = require('express');
@@ -65,6 +66,13 @@ app.get('/combpk', function(request, response){
 
 });
 
+function getKeyBytes(key, byteArray) {
+    for(let i = 0; i < key.length; i += 4) {
+        let B64EncodedByte = key.substring(i, i + 4);
+
+        byteArray.push(atob(B64EncodedByte));
+    }
+}
 
 //byte array version
 app.post('/cmpkstring', function(request, response){
@@ -77,19 +85,25 @@ app.post('/cmpkstring', function(request, response){
     if(partials.length > 1)//if we're submitting more than one key
     {
         console.log('Combining ' + partials.length + " public keys into one...");
-        for (var i = partials.length - 1; i >= 0; i--) {
-            console.log('PK' + i + ':    ' + partials[i]);
-            var bytes = Buffer.from(partials[i].split(','), 'hex');
-            var pk = new ctx.ECP.fromBytes(bytes);
-            parsed.push(pk);
+        for (let i = partials.length - 1; i >= 0; i--) {
+            console.log('PK' + i + ':   ' + partials[i]);
+
+            let rawBytes = [];
+            getKeyBytes(partials[i], rawBytes);
+
+            parsed.push(new ctx.ECP.fromBytes(Buffer.from(rawBytes, 'hex')));
         }
     }
     else if(partials.length === 1)
     {
         console.log("Combining just one public key...");
-        var bytes = Buffer.from(partials[0].split(','), 'hex');
-        var pk = new ctx.ECP.fromBytes(bytes);
-        parsed.push(pk);
+        let PKStr = partials[0];
+        console.log("PK:    " + PKStr);
+
+        let rawBytes = [];
+        getKeyBytes(PKStr, rawBytes);
+
+        parsed.push(new ctx.ECP.fromBytes(Buffer.from(rawBytes, 'hex')));
     }
 	
 	response.json(combine_pks(parsed));

Node/package.json

@@ -17,6 +17,7 @@
   "author": "Bingsheng Zang, Thomas Smith, Vincent de Almeida",
   "license": "ISC",
   "dependencies": {
+    "atob": "^2.1.2",
     "body-parser": "^1.18.3",
     "express": "^4.16.3",
     "milagro-crypto-js": "git+https://github.com/milagro-crypto/milagro-crypto-js.git"

allauthdemo/polls/models.py

@@ -145,7 +145,7 @@ class Event(models.Model):
 class TrusteeKey(models.Model):
     event = models.ForeignKey(Event, on_delete=models.CASCADE, related_name="trustee_keys")
     user = models.ForeignKey(EmailUser, on_delete=models.CASCADE, related_name="trustee_keys")
-    key = models.CharField(max_length=255, unique=True)
+    key = models.CharField(max_length=260)
 
 
 class AccessKey(models.Model):

allauthdemo/templates/bases/bootstrap-jquery.html

@@ -108,11 +108,21 @@
     keypair.PK.toBytes(PKbytes);
     keypair.SK.toBytes(SKbytes);
 
-    $('input#public-key').val(PKbytes.toString());
-    $('input#secret-key').val(SKbytes.toString());
+    var PKB64Encoded = "";
+    for(let i = 0; i < PKbytes.length; i++) {
+        PKB64Encoded += btoa(PKbytes[i]);
+    }
+
+    var SKB64Encoded = "";
+    for(let j = 0; j < SKbytes.length; j++) {
+        SKB64Encoded += btoa(SKbytes[j]);
+    }
+
+    $('input#public-key').val(PKB64Encoded);
+    $('input#secret-key').val(SKB64Encoded);
 
     //mostly code from before here
-    var blob = new Blob([SKbytes.toString()], {type : 'text/plain'});
+    var blob = new Blob([SKB64Encoded], {type : 'text/plain'});
 
     var dlBtn = $('a#download-btn');
     var url = URL.createObjectURL(blob);

static/js/decrypt_event.js

@@ -15,6 +15,14 @@ function csrfSafeMethod(method) {
     return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
 }
 
+function getKeyBytes(key, byteArray) {
+    for(let i = 0; i < key.length; i += 4) {
+        let B64EncodedByte = key.substring(i, i + 4);
+
+        byteArray.push(atob(B64EncodedByte));
+    }
+}
+
 function showDialog(titleTxt, bodyTxt) {
     var modalDialog = $('#modalDialog');
     var title = modalDialog.find('.modal-title');
@@ -37,7 +45,14 @@ function validateSKFromString(SKStr) {
     // Re-create the SK from the string byte definition
     let ctx = new CTX("BN254CX");
 
-    let skBytes = SKStr.split(",");
+    // Check that the length is valid, otherwise display an error
+    if(!(SKStr.length % 4 === 0)) {
+        showDialog('Error',
+            'The length of the supplied secret key appears to be invalid. Check and try again.');
+    }
+
+    let skBytes = [];
+    getKeyBytes(SKStr, skBytes);
     let sk = new ctx.BIG.fromBytes(skBytes);
 
     // Re-create the params
@@ -56,10 +71,8 @@ function validateSKFromString(SKStr) {
     };
 
     // Re-create the trustee PK from the string byte definition
-    let pkBytes = trustee_pk.split(',').map(function(byteStr) {
-        return parseInt(byteStr)
-    });
-
+    let pkBytes = [];
+    getKeyBytes(trustee_pk, pkBytes);
     let pk = new ctx.ECP.fromBytes(pkBytes);
 
     // Check that the SK supplies generates the PK we know about
@@ -75,7 +88,8 @@ function decryptSubmitCiphers() {
     else {
         // Rebuild the trustee's secret key
         var ctx = new CTX("BN254CX");
-        var skBytes = skString.split(",");
+        var skBytes = [];
+        getKeyBytes(skString, skBytes);
         var sk = new ctx.BIG.fromBytes(skBytes);
 
         var inputs = $("form input[type=text]");