Make sure there is enough entropy.

This patch will improve key randomness by requiring the user to move the
mouse if there is not enough entropy.

(cherry picked from commit c6e98045aa833dff824f892eb3392744c03a59f7)

js/zerobin.js

@@ -161,7 +161,7 @@ function pasteID() {
 function setElementText(element, text) {
     // For IE<10.
     if ($('div#oldienotice').is(":visible")) {
-        // IE<10 do not support white-space:pre-wrap; so we have to do this BIG UGLY STINKING THING.
+        // IE<10 does not support white-space:pre-wrap; so we have to do this BIG UGLY STINKING THING.
         element.text(text.replace(/\n/ig,'{BIG_UGLY_STINKING_THING__OH_GOD_I_HATE_IE}'));
         element.html(element.text().replace(/{BIG_UGLY_STINKING_THING__OH_GOD_I_HATE_IE}/ig,"\n<br />"));
     }
@@ -306,6 +306,7 @@ function send_comment(parentid) {
     });
 }
 
+
 /**
  *  Send a new paste to server
  */
@@ -314,7 +315,17 @@ function send_data() {
     if ($('textarea#message').val().length == 0) {
         return;
     }
+
+    // If sjcl has not collected enough entropy yet, display a message.
+    if (!sjcl.random.isReady())
+    {
+        showStatus('Sending paste (Please move your mouse for more entropy)...', spin=true);
+        sjcl.random.addEventListener('seeded', function(){ send_data(); }); 
+        return; 
+    }
+    
     showStatus('Sending paste...', spin=true);
+
     var randomkey = sjcl.codec.base64.fromBits(sjcl.random.randomWords(8, 0), 0);
     var cipherdata = zeroCipher(randomkey, $('textarea#message').val());
     var data_to_send = { data:           cipherdata,