< KDE PIM | KItineraryRevision as of 15:16, 30 March 2020 by Vkrause (talk | contribs)(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff) General Observations always exactly 107 byte all binary, there are no recognizable ASCII strings in this the last ~64 byte have very high entropy, suggesting a signature or a compressed section there's a base64 encoded sequential number printed below the Aztec code on the ticket, containing 24bit. there's a 13 digit order number and optionally a 15 digit reference number on each ticket, sequential and covering multiple sections/travelers one barcode seems to be exactly for one journey section all available samples are for a single adult traveler, and for second class Bit Layout Byte[:Bit] (MSB) Content Meaning Notes 0 - 1 0b0001 0000 0b0000 0010 unknown fixed in all samples 2 0b1010 0000 or 0b1000 0000 unknown 3 0b0000 0001 unknown fixed in all samples 4:0 4:6 null 4:7 - 5:7 9 bit uint day of travel counted from Jan 1 6 - 13:1 0x00 0x49 0x24 0x92 0x49 0x24 0x92 0b00 fixed in all samples, patterns repeats below 13:2 - 15:3 3 x 6bit departure station see below 15:4 - 17:0 0b1001 0b0010 0100 0b0 fixed in all samples 17:1 - 19:2 3 x 6bit arrival station see below 19:3 - 21:7 todo todo 22:0 - 23:5 14 bit uint train number might be including too many/few leading 0 bits, 0 for buses 23:6 - 25:3 null 25:4 - 28:7 todo todo 29 0b0010 0000 fixed in all samples 30:0 - 30:5 6 bit uint coach number leading 0 bits uncertain 30:6 - 31:4 7 bit uint seat number 0 if no seat reserved 31:5 - 31:7 0b100 fixed in all samples 32 - 40 0x89 0x24 0x92 0x49 0x24 0x90 0x60 0x00 0x01 fixed in all samples, repeats a pattern from 6-12 41:0 - 42:0 todo todo varies slightly between samples 42:1 - 106:0 64 byte varying high entropy in all samples, signature? 106:1 - 106:7 0x00 or 0x80 Station Codes Using 2-3 alphabetical codes from https://rata.digitraffic.fi/api/v1/metadata/stations, Wikidata has those codes as untyped P296 properties Values are encoded as a six bit number per character. Adding 55 to that number results in the corresponding ASCII code, which would suggest values 0-9 are reserved for digits. The value 36 (']' by that rule) is used to mark an unset character in case of two letter station codes. Retrieved from "https://community.kde.org/index.php?title=KDE_PIM/KItinerary/vr.fi_Barcode&oldid=87893" Content is available under Creative Commons License SA 4.0 unless otherwise noted.