1# set extra field 2args -- encrypt get_extra 0 0 c get_extra 0 1 c get_extra 0 0 l get_extra 0 1 l set_extra 0 2345 -1 l extrafieldcontent set_extra 0 2345 -1 c extrafieldcontent get_extra 0 0 c get_extra 0 1 c get_extra 0 2 c get_extra 0 0 l get_extra 0 1 l get_extra 0 2 l 3file encrypt encrypt.zip encrypt_plus_extra.zip 4return 0 5stdout Extra field 0x5455: len 5, data 0x033dda4c44 6stdout Extra field 0x7855: len 0 7stdout Extra field 0x5455: len 9, data 0x033dda4c444dda4c44 8stdout Extra field 0x7855: len 4, data 0x64001400 9stdout Extra field 0x5455: len 5, data 0x033dda4c44 10stdout Extra field 0x7855: len 0 11stdout Extra field 0x0929: len 17, data 0x65787472616669656c64636f6e74656e74 12stdout Extra field 0x5455: len 9, data 0x033dda4c444dda4c44 13stdout Extra field 0x7855: len 4, data 0x64001400 14stdout Extra field 0x0929: len 17, data 0x65787472616669656c64636f6e74656e74 15