FIDO UAF (Universal Authentication Framework) client for Android
· You can use the FIDO UAF client to authenticate logging in to Android apps without a password.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window fido-uaf-client-android-1.0.3.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.