Expose SID API

     */

    byte[] verifyChallenge(int uid, long challenge, in byte[] enrolledPasswordHandle,

            in byte[] providedPassword);

    /**

     * Retrieves the secure identifier for the user with the provided Android ID,

     * or 0 if none is found.

     * @param uid the Android user id

     */

    long getSecureUserId(int uid);

}