From b0403efc80ddc5ee708cfcc5601ec4560497f47e Mon Sep 17 00:00:00 2001
From: Frank Denis <github@pureftpd.org>
Date: Sat, 22 Nov 2014 11:24:32 -0800
Subject: [PATCH] Fail if JS crypto is not available. Emscripten registers
 /dev/urandom and /dev/random by default, but falls back to Math.random()*256
 when crypto.getRandomValues() is not available, which is not acceptable. So
 we need to re-register them no matter what.

---
 test/default/pre.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/test/default/pre.js b/test/default/pre.js
index 812253de..b8d1f665 100644
--- a/test/default/pre.js
+++ b/test/default/pre.js
@@ -23,7 +23,9 @@ Module['preRun'].push(function(){
             }
             randombyte_node();
             randombyte = randombyte_node;
-        } catch(e) { }
+        } catch(e) {
+            throw 'No secure random number generator found';
+        }
     }
     FS.init();
     var devFolder = FS.findObject('/dev') ||