I read about ISO 8583 messaging at WIKI and Code Project; I understood ISO 8583 messages can basically be divided in 3 parts:
- MTI (Message Type Indicator)
1.1. Version
1.2. Message Class
1.3. Message Function
1.4. Message Origin
- Bitmap
Indicate which data elements are present.
- DataElement
The essence of the whole ISO message, contain information about the transaction such as:
transaction type,
amount,
customerid, etc.
So, after reading these two web references, I want to make divide my ISO messaging log as MTI, bitmap, and Data Element.
For example:
(0800 2020000000800000 000000 000001 3239313130303031)
MTI: 0800 (1987 version, Network Management Message, Request, Acquirer)
Bitmap: 20 20 00 00 00 80 00 00 (eg. 20 = 0010 0000 ,so position 3 is on)
DataElement:(by seeing Bitmap , we can defined data element as follow)
field 03:000000 (Processing Code)
field 11:000001 (Systems trace audit number)
field 41:3239313130303031 (Card acceptor terminal idenfication)
But my challenge is that I already have ISO 8583 messaging log from my ATM Machine.
This actual output messaging log is not very clear like the one in the snippet above.
So I cannot divide this message to MTI, Bitmap and Data element like upper example.
00000:00 5B 30 31 31 30 30 30 30 30 30 30 30 38 32 30 80 38 00 00 [.[01100000000820.8..]
00020:00 81 00 00 04 00 00 00 00 00 00 00 33 36 32 39 31 30 31 30 [............36291010]
00040:32 39 35 37 31 30 33 31 31 30 30 30 30 30 30 35 30 33 31 53 [2957103110000005031S]
00060:55 32 30 31 31 31 30 33 31 31 30 32 39 35 37 32 30 31 31 31 [U2011103110295720111]
00080:30 33 31 31 30 32 39 35 37 33 30 30 31 [0311029573001 ]
I have no previous experience in ISO 8583 message and welcome suggestions.