Merge pull request #131 from aleksessex/master

Fix bias in voting booth random number generator

heliosbooth/js/jscrypto/random.js

@@ -26,7 +26,7 @@ Random.getRandomInteger = function(max) {
   var bit_length = max.bitLength();
   Random.setupGenerator();
   var random;
-  random = sjcl.random.randomWords(bit_length / 32, 0);
+  random = sjcl.random.randomWords(Math.ceil(bit_length / 32)+2, 0);
   // we get a bit array instead of a BigInteger in this case
   var rand_bi = new BigInt(sjcl.codec.hex.fromBits(random), 16);
   return rand_bi.mod(max);