VeriFone MX800 series Programmer's Manual page 321

Response Packet
GISKE Block Format
04 Length:
Response Packet 04
GISKE Block Format
Example:
Table 60 Response Packet 04 GISKE Key Block Format (Continued)
Data
Characteristic
Element
Mode of Use 1AH
Attribute
(MOUA)
Key Version 2AH
(KV)
Key Length 1AH
(KL)
<SO> 1H
{LRC} 1H
•
MAX: 12 characters
•
MIN: 12 characters
<SI>040[KUA][MOUA][MACMA][KV][KL]<SO>{LRC}
IPP MS DUKPT C
AND
Comments
(optional) Only if the master key present at
address [a]. The value is stored in the key
attributes register.
N: No special restrictions [0]
•
E: Encryption only [1]
•
D: Decryption only [2]
•
S: Signature only [3]
•
0: IV [4]
•
G: MAC generate [5]
•
V: MAC verify [6]
•
C: Calculate = generate or verify) [7]
•
[6]–[F]: Reserved
•
To save storage space in RAM, the
Note:
mode of use attribute is converted to [x],
a hex number ranging form 0–F (4 bits).
In the response packet (to packet 04),
the IPP converts the hex number back
to characters used in the GISKE
specification.
(optional) Only if the master key present at
address [a]. The 2-digit ASCII character version
number is optionally used to reinject old keys. If
not used, this field is filled with ASCII 0 (0x30).
The IPP allocates 1 byte per key for
Note:
each key version register.
(optional) Only if the master key present at
address [a].
1: single-length key
•
2: double-length key
•
3: triple-length key
•
The IPP allocates 1 byte per key for
Note:
each key version register.
Shift Out, Value: 0Eh
Error Check
X
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