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ACR38 Reference Manual version 1.9 February 2006

Response data format

Header Status Data length SW1 SW2

LEN

SW1, SW2 = 90

if no error

8.2.8.5 AUTHENTICATE_MEMORY_CARD (SLE4436 and SLE5536 only)

To read a card authentication certificate from a SLE5536 card. The following actions are executed by the

ACR38:

o select Key 1 or Key 2 in the card as specified in the command

o present the challenge data specified in the command to the card

o generate the specified number of CLK pulses for each bit of authentication data computed by

the card

o read 16 bits of authentication data from the card

o reset the card to normal operation mode

The ACR38 returns the 16 bits of authentication data calculated by the card in the response.

Command format

Header Instruction Data length Data

LEN

CLA INS P1 P2

MEM_L CODE

MSB LSB

KEY CLK_CNT Byte1 Byte 2 …… Byte 5 Byte 6

KEY Key to be used for the computation of the authentication certificate:

: key 1 with no cipher block chaining

: key 2 with no cipher block chaining

: key 1 with cipher block chaining (SLE5536 only)

: key 2 with cipher block chaining (SLE5536 only)

CLK_CNT Number of CLK pulses to be supplied to the card for the computation of each bit of the

authentication certificate.

BYTE 1...6 Card challenge data

Response data format

Header Status Data length CERT SW1 SW2

LEN

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

if no error

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ACS ACR 38 Manuel d'utilisateur Page 40