Initial Move from Azure DevOps to GitHub

src/Utils/MessageValidation.ts

@@ -0,0 +1,16 @@
+import { config } from "../Config";
+
+export function isInvalidParentFrameOrigin(event: MessageEvent): boolean {
+  return !isValidOrigin(config.allowedParentFrameOrigins, event);
+}
+
+function isValidOrigin(allowedOrigins: RegExp, event: MessageEvent): boolean {
+  const eventOrigin = (event && event.origin) || "";
+  const windowOrigin = (window && window.origin) || "";
+  if (eventOrigin === windowOrigin) {
+    return true;
+  }
+
+  const result = allowedOrigins && allowedOrigins.test(eventOrigin);
+  return result;
+}