From e7c826735c520c0e3946d587c388494260bf1b80 Mon Sep 17 00:00:00 2001
From: Sebastian Kalinowski <sebastian@kalinowski.eu>
Date: Sun, 16 Jun 2019 19:16:32 +0200
Subject: [PATCH] Pass token header to secret fetching function

Depending of function arity pass decoded header of the token.
This is to allow backward compatibilty.
---
 lib/index.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/index.js b/lib/index.js
index 575875b..fce7444 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -243,13 +243,18 @@ function getSecret (request, secret, token, callback) {
       return callback({ code: 'invalid_token', message: 'jwt signature is required' });
     }
 
-    let decodedToken = jwt.decode(token);
+    let decodedToken = jwt.decode(token, { complete: true });
 
     if (!decodedToken) {
       return callback({ code: 'invalid_token', message: 'jwt malformed' });
     }
 
-    secret(request, decodedToken, callback);
+    const arity = secret.length;
+    if (arity == 4) {
+      secret(request, decodedToken.header, decodedToken.payload, callback);
+    } else { // arity == 3
+      secret(request, decodedToken.payload, callback);
+    }
   } else {
     callback(null, secret);
   }