Modification example 4 – ACS ACR83 PINeasy Smart Card Reader User Manual
Page 33
ACR83 – Reference Manual
Version 1.05
www.acs.com.hk
Page 33 of 49
Command Header
SpePINPos
SpePINLen
APDU Command
Header
Lc
Offset SpePINPos 1 Byte
PIN
00 24 00 01
09
Offset (4 bits)
SpePINSize (4bits)
Not used
field
PIN
00 24 00 01
09
57h
Input 9 digits
Does not
exist
PIN
00 24 00 01
09
0101
=
0101
0111
1001
(bits)
Does not
exist
PIN
00 24 00 01
09
0101
1001
(59h) (
1001
replace original
0101
0111
)
-
PIN
How about the PIN management?
Because it is Left and BCD arrangement
PIN (Byte)
Original
00 24 00 01 09 57 30 30 30 30 30 30 30 30h
Input
12 34 56 78 0h
Result PIN
00 24 00 01 09 59 12 34 56 78 00 30 30 30h
The whole APDU in byte format will be:
00 24 00 01 09 5
9
12 34 56 78 0
0 30 30 30h
If arrangement is Right:
bmFormatString change to=8Dh
00 24 00 01 08 5
9
30 30 30 3
1 23 45 67 80h
12.12. Modification Example 4
bConfirmPIN Bit1 = 1
(Current/Old PIN entry requested)
System unit is bit.
APDU Command
SpeOffsetOld
SpePINLen
APDU Header APDU
Lc
Maybe not
Offset SpePINPos
Old PIN
CLA INS P1 P2
Lc
Exists
Offset
SpePINLenPos SpePINSize
Not used
field
Old PIN
SpeOffsetNew
SpePINLen
Maybe not
Offset SpePINPos
New PIN
Exists
Offset
SpePINLenPos
SpePINSize
Not used field
New PIN