VeriFone MX800 Series User Manual

IPP LEGACY LIBRARY
ipp_mac()
222 M
X
800 SERIES PROGRAMMERS GUIDE
ipp_mac()
This function performs a MAC calculation on the user data and returns the
resultant value.
Prototype
return = ipp_mac(master_key, working_key, second_key, message,
message_length, result);
int return;
unsigned int message_length;
char master_key, second_key, *working_key, *message, *result;
Parameters
Return Values
master_key ASCII "0...9" selects master key number
working_key
second_key ASCII "0...9" selects second key number
message message to calculate MAC on
message_length max 3200, number of characters in message
result buffer pointer to contain the resultant MAC value
1 Successful
-1 Master Key Pointer Error
-2 Second Key Pointer Error
-3 Message length too large
-4 Wrong Block Size
-5 Communication Error
1DES Mode 16 characters, null terminated
3DES Mode 20 characters, null terminated GISKE data
block

VeriFone MX800 Series Specifications

General

Brand	VeriFone
Model	MX800 Series
Category	Touch terminals
Language	English