KDE PIM/KItinerary/Thalys Barcode: Difference between revisions
< KDE PIM | KItinerary
| Line 5: | Line 5: | ||
* there's ~40 bytes towards the end with very high entropy, possibly some kind of signature | * there's ~40 bytes towards the end with very high entropy, possibly some kind of signature | ||
* based on currently only 3 samples, so there's limited confidence in this | * based on currently only 3 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 = | = Bit Layout = | ||
Revision as of 17:32, 5 February 2020
General Observations
- always exactly 114 byte
- all binary, there are no recognizable ASCII strings in this
- there's ~40 bytes towards the end with very high entropy, possibly some kind of signature
- based on currently only 3 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 - 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 - 54:7 | TODO | ||
| 55:0 - 58:7 | 0xc0 0a 80 30 | fixed in all samples | |
| 59:0 - 105:7 | TODO | ||
| 106:0 - 113:7 | null |