MagTek MagneSafe V5 - Manual (Page 17)

Section 2. Communications
9
Card data is only sent to the host on the Interrupt In pipe using an Input Report. The reader will
send only one Input Report per card swipe. If the host requests data from the reader when no
data is available, the reader will send a NAK to the host to indicate that it has nothing to send.
When a card is swiped, the Input Report will be sent even if the data is not decodable. The
following table shows how the input report is structured.
Offset Usage Name
0 Track 1 decode status
1 Track 2 decode status
2 Track 3 decode status
3 Track 1 encrypted data length
4 Track 2 encrypted data length
5 Track 3 encrypted data length
6 Card encode type
7 – 118 Track 1 encrypted data
119 – 230 Track 2 encrypted data
231 - 342 Track 3 encrypted data
343 Card status
344 – 347 MagnePrint status
348 MagnePrint data length
349 - 476 MagnePrint data
477 – 492 Device serial number
493-494 Reader Encryption Status
495 – 504 DUKPT serial number/counter
505 Track 1 Masked data length
506 Track 2 Masked data length
507 Track 3 Masked data length
508 – 619 Track 1 Masked data
620 – 731 Track 2 Masked data
732 – 843 Track 3 Masked data
844 – 851 Encrypted Session ID
852 Track 1 Absolute data length
853 Track 2 Absolute data length
854 Track 3 Absolute data length
855 MagnePrint Absolute data length
856-858 Encryption Counter
859-866 MagneSafe Version Number
867-886 Hashed Track 2 Data