ACS ACR38K Smart Keyboard - Manual (Page 45)

ACR38x (CCID) – Reference Manual [email protected]
Version 6.04 www.acs.com.hk
Page 45 of 58
Where:
KEY Key to be used for the computation of the authentication certificate:
00h: Key 1 with no cipher block chaining
01h: Key 2 with no cipher block chaining
80h: Key 1 with cipher block chaining (SLE 5536 and SLE 6636 only)
81h: Key 2 with cipher block chaining (SLE 5536 and SLE 6636 only)
CLK_CNT Number of CLK pulses to be supplied to the card for the computation of each bit
of the authentication certificate. Typical value is 160 clocks (A0
H
)
BYTE 1...6 Card challenge data
Response Data Format (abData field in the RDR_to_PC_DataBlock)
SW1 SW2
61h 02h
Where:
SW1 SW2 = 61 02h if no error, meaning two bytes of authentication data are ready. The
authentication data can be retrieved by Get_Response command
Step 2: Get back the Authentication Data (Get_Response).
Command Format (abData field in the PC_to_RDR_XfrBlock)
Pseudo-APDU
CLA INS P1 P2 MEM_L
FFh C0h 00h 00h 02h
Response Data Format (abData field in the RDR_to_PC_DataBlock)
CERT SW1 SW2
Where:
CERT 16 bits of authentication data computed by the card. The LSB of BYTE 1 is the
first authentication bit read from the card.
SW1 SW2 = 90 00h if no error