KDE PIM/KItinerary/Thalys Barcode: Difference between revisions
< KDE PIM | KItinerary
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* based on currently only 4 samples, so there's limited confidence in this | * based on currently only 4 samples, so there's limited confidence in this | ||
* 0:4 - 2:1 (14 bit) is "3018", which is the UIC operator code of Thalys. This matches Appendix C of ANNEX B.6 of TAP TSI, but unfortunately only for the first 18 bit it seems. Might still mean a similar encoding is used, but in a different layout. | * 0:4 - 2:1 (14 bit) is "3018", which is the UIC operator code of Thalys. This matches Appendix C of ANNEX B.6 of TAP TSI, but unfortunately only for the first 18 bit it seems. Might still mean a similar encoding is used, but in a different layout. | ||
= Bit Layout = | = Bit Layout = | ||
Revision as of 17:23, 13 February 2020
General Observations
- always exactly 114 byte
- all binary, there are no recognizable ASCII strings in this
- there's two 14-15 byte variable lengths blocks towards the end with very high entropy, possibly some kind of signature
- based on currently only 4 samples, so there's limited confidence in this
- 0:4 - 2:1 (14 bit) is "3018", which is the UIC operator code of Thalys. This matches Appendix C of ANNEX B.6 of TAP TSI, but unfortunately only for the first 18 bit it seems. Might still mean a similar encoding is used, but in a different layout.
Bit Layout
| Byte[:Bit] (MSB) | Content | Meaning | Notes |
|---|---|---|---|
| 0:0 - 4:7 | 0x32 F2 84 20 40 | fixed in all samples | |
| 5:0 - 5:7 | 0x01 or 0x02 | class | |
| 6:0 - 8:7 | null | ||
| 9:0 - 9:7 | 0x01 | ticket/traveler count, or traveler type? | |
| 10:0 - 18:3 | TODO | ||
| 18:4 - 22:1 | 5 x 6bit | departure station | see below |
| 22:2 - 25:7 | 5 x 6bit | arrival station | see below |
| 26:1 - 35:7 | TODO | ||
| 36:0 - 42:7 | null | ||
| 43:0 - 49:7 | 0x9a 0c 28 82 c8 22 b2 | fixed in all samples | |
| 50:0 - 55:7 | TODO | ||
| 56:0 - 58:7 | 0x0a 80 30 | fixed in all samples | |
| 59:0 - 59:7 | 0x2C or 0x2E |
After this there follow two blocks with the following variable length layout:
| Byte[:Bit] (MSB) | Content | Meaning | Notes |
|---|---|---|---|
| 0:0 - 0:7 | 0x02 | fixed | |
| 1:0 - 1:7 | 8bit uint | length | |
| N bytes | high entropy content |
Remaining bytes are filled by null until reaching 114 bytes.
Station identifiers:
- using Benerail identifiers, which consists of 5 upper-case letters, the first two being the ISO 3166-1 alpha 2 code
- each letter is encoded as a 5 bit value that can be converted to the corresponding ASCII value by adding 32.