ACS ACR1255U-J1, Reference Manual

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ACR1255U-J1 – Reference Manual
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5.7.3. RDR_to_SPH_AuthRsp1
This command is sent by ACR1255U-J1 in response to the SPH_to_RDR_ReqAuth.
Offset Field Size Value Description Encrypted
0 bMessageType 1 83h No
1
LEN1 LEN2
(wLength)
2 0015h
Number of extra bytes in
abRndNum field, and is
expressed in two bytes
long, and LEN1 is MSB
while LEN2 is LSB;
No
3 Slot Number 1 00h No
4 Sequence 1 00h No
5 Parameter 1 00h Slot Status
6
wChecksum
1
wChecksum means the
XOR values of all bytes
in the command
No
7 abRndNum 21
E1 00 00 45 00
+ 16 bytes
random number
abRndNum[0:15] – 16
bytes of random number
All the 16-byte data
must be encrypted with
the Customer Master
Key currently stored in
ACR1255U-J1.
“E1 00 00 45 00” does
not need to be
encrypted.
Yes