Ipp Legacy Library; Ipp Support For The M 800 Series Of Terminals - VeriFone MX800 series Programmer's Manual

IPP Legacy Library

IPP Support for
x
the M 800 series
of Terminals
This chapter describes the IPP support functions ported from the TXO platforms
(Omni 7xxx):
•
ipp_getpin()
•
ipp_read()
•
ipp_abort()
•
ipp_diag()
•
ipp_mac()
•
select_key_mgmnt()
•
get_key_mgmnt()
These functions are actually a front-end to the IPP functions described in
4. All the limitations of the IPP emulation listed in
of functions.
In addition, there are several differences between the Omni 7xxx functions and
x
the M 800 series of terminals functions due to the underlying architecture:
•
The PIN exhaustion protection is implemented differently (See
PIN session timeout). On the M
available when starting the PIN session. If no token is available the
ipp_getpin() function returns -2. In the Omni 7xxx, a token must be
available when returning the encrypted PIN block. The ipp_read() function
returns -5 until one gets available.
x
•
On the M 800 series terminal, some of the parameter checking is done
beforehand. For instance ipp_getpin() returns -3 for an invalid minimum
PIN length, invalid maximum PIN length, invalid master key number or invalid
working key string. On the Omni 7xxx, those errors are reported by the
ipp_read() function.
x
•
The M 800 series of terminals' ipp_read() return value does not go through
all the intermediate states than the Omni 7xxx's does. For instance, value -3, -
4 and -5 are never returned by ipp_read() on the M
Chapter 4
x
800 series of terminals, a token must be
x
X
M 800 S
ERIES
C 10
HAPTER
Chapter
also apply to this set
Note on the
800 series of terminals.
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