Merge pull request travist#67 from pkaminski/entropy-fix

Protect against permission denied error when accessing mouse coordinates
kubz · Apr 19, 2016 · 97e5572 · 97e5572
2 parents c41f21e + 9c37422
commit 97e5572
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/lib/jsbn/rng.js b/lib/jsbn/rng.js
@@ -27,9 +27,13 @@ if(rng_pool == null) {
         window.detachEvent("onmousemove", onMouseMoveListener);
       return;
     }
-    this.count += 1;
-    var mouseCoordinates = ev.x + ev.y;
-    rng_pool[rng_pptr++] = mouseCoordinates & 255;
+    try {
+      var mouseCoordinates = ev.x + ev.y;
+      rng_pool[rng_pptr++] = mouseCoordinates & 255;
+      this.count += 1;
+    } catch (e) {
+      // Sometimes Firefox will deny permission to access event properties for some reason. Ignore.
+    }
   };
   if (window.addEventListener)
     window.addEventListener("mousemove", onMouseMoveListener, false);