spark-2.3.1.tgz: 197FFCF0 981CB3E3 DDA5C199 312B2BFB 098BF44B 59BB4BE9 60054A44
                 C4954BB5 9A289F78 F6F08953 341A7362 718C31A3 4B63CCD1 16FE7556
                 C1B9BFEF FA47F776