Dukpt Packet 91: Load Initial Key Response - VeriFone MX800 series Programmer's Manual

DUKPT Packet 91:
Load Initial Key
Response
DUKPT Packet 91
Length
Table 74 DUKPT Packet 90 Communication Protocol
Master Device
90 Packet
ACK if LRC
•
NAK if LRC incorrect
•
EOT after 3 NAKs
•
Response packet to packet 90. Response to controller with confirmation status. If
21 Future Keys are successfully initialized, Packet 91 responds with confirmation.
Else, negative response packet 91 returns.
Table 75 DUKPT Packet 91 Format
Data Element Characteristic
<STX> 1H
Packet Type 2AN
[CS] 1N
Initial PIN
encryption key length
(through packet 90)
sent by the master device
16AH
32AH
<ETX> 1H
1H
{LRC}
•
MAX: 6 characters
•
MIN: 6 characters
IPP MS
Transmit
IPP
Direction
ACK if LRC
•
NAK if LRC incorrect
•
EOT after 3 NAKs
•
Initialization of 21 Future Keys
•
Packet 91 with confirmed status
Comments
Start of text, Value: 02h
Value: 91
Confirmation status:
0 = Confirmed
•
1 = Not confirmed
•
2 = (IPP7 only) Error; incorrect key length.
•
Confirmation status 2 only applies to IPP7. It
indicates that the length of the initial PIN
encryption key does not comply with 1DES or
3DES DUKPT mode, as follows:
IPP7 Current
DUKPT Mode
3DES
1DES
End of text, value: 03h
Error check character
DUKPT C
AND OMMUNICATIONS
Packet 25: Check the DUKPT Engine
[CS] response from
the IPP
2
2
X
M 800 S P
ERIES ROGRAMMERS
P
ACKETS
329
G
UIDE