MagTek IntelliStripe 320 99875168 - Manual (Page 121)

Appendix B. Memory Card Support
115
Response APDU:
MAC (2 bytes)
SW1 = 90 SW2 = 00
OR
SW1 = 67
SW2 = 00
If SW1/SW2 indicates normal completion (9000), the MAC field is 2 bytes long and is the result
of the Authentication. If SW1/SW2 indicates a wrong length, the MAC is not included in the
message
Possible SW1/SW2 combinations:
SW1/SW2 Meaning
9000
Normal completion, no errors
6700 Wrong length, Lc does not equal 6 or Le does not equal 2