From 38c732cd437453efbdc18ba9f5dd7dc94f6c8753 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lu=C3=ADs=20Rudge?= <luis.rudge@auth0.com>
Date: Mon, 14 Oct 2019 15:10:10 -0300
Subject: [PATCH] Fix IE msCrypto.subtle usage (#242)

* Fix IE subtle

* rename

* Update __tests__/utils.test.ts

Co-Authored-By: Josh Cunningham <josh.cunningham@auth0.com>

* Update __tests__/utils.test.ts

Co-Authored-By: Josh Cunningham <josh.cunningham@auth0.com>
---
 __tests__/utils.test.ts | 7 +++++++
 src/utils.ts            | 3 ++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/__tests__/utils.test.ts b/__tests__/utils.test.ts
index c08aa63d7..c16217d76 100644
--- a/__tests__/utils.test.ts
+++ b/__tests__/utils.test.ts
@@ -527,6 +527,13 @@ describe('utils', () => {
       const theSubtle = getCryptoSubtle();
       expect(theSubtle).toBe('window');
     });
+    it('should use msCrypto.subtle when available', () => {
+      (<any>global).crypto = undefined;
+      (<any>global).msCrypto = { subtle: 'ms' };
+
+      const cryptoSubtle = getCryptoSubtle();
+      expect(cryptoSubtle).toBe('ms');
+    });
   });
   describe('validateCrypto', () => {
     it('should throw error if crypto is unavailable', () => {
diff --git a/src/utils.ts b/src/utils.ts
index 8943ae802..c5bc434cd 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -183,8 +183,9 @@ export const getCrypto = () => {
 };
 
 export const getCryptoSubtle = () => {
+  const crypto = getCrypto();
   //safari 10.x uses webkitSubtle
-  return window.crypto.subtle || (<any>window.crypto).webkitSubtle;
+  return crypto.subtle || (<any>crypto).webkitSubtle;
 };
 
 export const validateCrypto = () => {