From f1cffd033bffc44f20558eda4a797c3fa2f4ee05 Mon Sep 17 00:00:00 2001
From: Jakub Mikulas <jakub@jedenbod.cz>
Date: Wed, 22 Apr 2015 16:20:44 +0200
Subject: [PATCH] Simplified checking for missing key

---
 index.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index 37dd0c5..6b0be78 100644
--- a/index.js
+++ b/index.js
@@ -107,8 +107,9 @@ module.exports.verify = function(jwtString, secretOrPublicKey, options, callback
     return done(new JsonWebTokenError('jwt signature is required'));
   }
 
-  if (typeof secretOrPublicKey === "undefined" || secretOrPublicKey === null) // secretOrPublicKey can be empty string
+  if (!secretOrPublicKey) {
     return done(new JsonWebTokenError('secret or public key must be provided'));
+  }
 
   if (!options.algorithms) {
     options.algorithms = ~secretOrPublicKey.toString().indexOf('BEGIN CERTIFICATE') ||