From 7a3d5777e02f1b489a3752b7e58e9c6ca03e128b Mon Sep 17 00:00:00 2001
From: AJ ONeal <aj@daplie.com>
Date: Tue, 21 Feb 2017 12:19:47 -0700
Subject: [PATCH] bugfix: must call atob/btoa from window context

---
 oauth3.implicit.js    | 2 ++
 oauth3.issuer.mock.js | 5 ++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/oauth3.implicit.js b/oauth3.implicit.js
index 4c27c4d..f1be21f 100644
--- a/oauth3.implicit.js
+++ b/oauth3.implicit.js
@@ -16,6 +16,8 @@
     }
   , _base64: {
       atob: function (base64) {
+        // atob must be called from the global context
+        // http://stackoverflow.com/questions/9677985/uncaught-typeerror-illegal-invocation-in-chrome
         return (exports.atob || require('atob'))(base64);
       }
     , decodeUrlSafe: function (b64) {
diff --git a/oauth3.issuer.mock.js b/oauth3.issuer.mock.js
index 24693de..b618ba0 100644
--- a/oauth3.issuer.mock.js
+++ b/oauth3.issuer.mock.js
@@ -3,7 +3,10 @@
 
   var OAUTH3 = exports.OAUTH3 = exports.OAUTH3 || require('./oauth3.implicit.js').OAUTH3;
 
-  OAUTH3._base64.btoa = exports.btoa || require('btoa');
+  OAUTH3._base64.btoa = function (b64) {
+    // http://stackoverflow.com/questions/9677985/uncaught-typeerror-illegal-invocation-in-chrome
+    (exports.btoa || require('btoa'))(b64);
+  }
   OAUTH3._base64.encodeUrlSafe = function (b64) {
     // Base64 to URL-safe Base64
     b64 = b64.replace(/\+/g, '-').replace(/\//g, '_');