From 7b89ad6bf78d5f619b659e25e181befd79cd8517 Mon Sep 17 00:00:00 2001
From: Kyle Spearrin <kyle.spearrin@gmail.com>
Date: Sat, 21 Jul 2018 14:07:06 -0400
Subject: [PATCH] check event.data type. some debug logging

---
 src/misc/u2f.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/misc/u2f.ts b/src/misc/u2f.ts
index 0c178bf62dc..6186df60d40 100644
--- a/src/misc/u2f.ts
+++ b/src/misc/u2f.ts
@@ -47,6 +47,8 @@ export class U2f {
     }
 
     private parseMessage(event: any) {
+        console.log('got u2f event');
+        console.log(event);
         if (!this.validMessage(event)) {
             this.errorCallback('Invalid message.');
             return;
@@ -63,8 +65,8 @@ export class U2f {
     }
 
     private validMessage(event: any) {
-        if (!event.origin || event.origin === '' ||
-            event.origin !== (this.connectorLink as any).origin || !event.data) {
+        if (event.origin == null || event.origin === '' || event.origin !== (this.connectorLink as any).origin ||
+            event.data == null || typeof (event.data) !== 'string') {
             return false;
         }