Merge pull request #588 from ryanmwright/patch-1

Validate self when calling crypto provider

Author: manfredsteyer

projects/lib/src/oauth-service.ts

@@ -2194,7 +2194,7 @@ export class OAuthService extends AuthConfig implements OnDestroy {
             let size = 45;
             let id = '';
 
-            const crypto = self.crypto || self['msCrypto'];
+            const crypto = typeof self === 'undefined' ? null : (self.crypto || self['msCrypto']);
             if (crypto) {
                 let bytes = new Uint8Array(size);
                 crypto.getRandomValues(bytes);