Packet 04 Giske Key Block Format - VeriFone MX800 series Programmer's Manual

Response Packet 04
Key-only Format
Length:
Response Packet 04
Key-only Format
Example:
Table 59 Response Packet 04 Key-only Format Communication
Protocol
Master Device
<SI>040<SO>{LRC}
ACK if LRC okay
•
NAK if LRC incorrect
•
EOT after 3 NAKs
•
•
MAX: 6 characters
•
MIN: 6 characters
<SI>040<SO>{LRC}

Packet 04 GISKE Key Block Format

The GISKE key block format communication protocol is used when the IPP is in
mixed or 3DES mode. The original GISKE (ASCII-hex) key usage attribute value
is saved in RAM (2 bytes).
<SI>042<SO>{LRC}
Table 60 Response Packet 04 GISKE Key Block Format
Data
Characteristic
Element
<SI> 1H
Packet Type 2AN
[r] 1AN
IPP MS
AND
Transmit
IPP
Direction
ACK if LRC okay
•
NAK if LRC incorrect
•
EOT after 3 NAKs
•
PIN pad checks requested address [a].
•
<SI>04[r]<SO>{LRC}
EOT
Comments
Shift In, Value: 0Fh
Value: 04
Response code:
0 = No master key at address [a]
•
F = Master key present at address [a]
•
M
DUKPT C
OMMUNICATIONS
MS-Specific Packets
X
800 S P
ERIES ROGRAMMERS
P
ACKETS
319
G
UIDE