User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 9 – Online transaction messages with Master / Session keys 2015-04-20
Page234
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message Z67 Message Authentication Code (MAC) Response
Format: <STX>Z67[status][MAC]<ETX>[LRC]
Message length: Fixed 7 (status only) or 23 (with MAC) bytes.
Usage: PP791 generated MAC calculation response. It contains status codes or MAC.
Message element:
Field Length Value and description
<STX> 1 <02>
Z67 3 Message ID
[status] 1 '0'=Success, MAC follows
'1'=Ready for next Z66 packet, user in
multiple messages.
'2'=Sequence numbers out of order
'3'=Master key specified in [KeyId] not exist,
or range unacceptable (id 0 to A), or
usage not “K0”, “M1”, “M3.
'4'=Master key specified in [SecKeyId]
unreasonable or not exist.
The [SecKeyId] only exists if [KeyId]
points to a “M1” master key, and the
[SecKeyId] itself should have “M1”
usage.
'5'=[Message] length have error (too long,
zero length, or not even number in binary
mode)
'6'=[PkyType] flag has invalid value
'7'=[Message] contents error (i.e. characters
larger than 'F' in binary mode)
'8'=[SessionKey] invaild
‘9’=MAC master key length should not be 8
‘A’=Session key is incompatible to the usage
of specified master key.
(If MK’s usage is “M1” or “M3”, SK
should contains all zero, if MK’s usage is
“K0”, SK should not be zero.)
[MAC] 16 Calculated MAC.
<ETX> 1 <03>
[LRC] 1 Checksum