Added server randomness for keygen, in case client-side is not enough

helios/templates/election_keygenerator.html

@@ -27,15 +27,23 @@ function reuse_key(secret_key_text) {
     show_pk();
 }
 
+// start collecting some local randomness
+sjcl.random.startCollectors();
+
 $(document).ready(function() {
     clear_keys();
     $('#generator').hide();
+
+    // get some more server-side randomness for keygen
+    $.getJSON('../../get-randomness', function(result) {
+       sjcl.random.addEntropy(result.randomness);
        BigInt.setup(function() {
           ELGAMAL_PARAMS = ElGamal.Params.fromJSONObject({{eg_params_json|safe}});
           $('#waiting_message').hide();
           $('#generator').show();
        });
     });
+});
 
 
 function generate_keypair() {

helios/views.py

@@ -508,7 +508,7 @@ def trustee_upload_pk(request, election, trustee):
 ##
 
 @json
-@election_view(frozen=True)
+@election_view()
 def get_randomness(request, election):
   """
   get some randomness to sprinkle into the sjcl entropy pool