MagTek DynaPro Mini Programmer's99875629 - Manual (Page 28)

3 - Command Set
DynaPro Mini| PIN Encryption Device | Programmer’s Reference (Commands)
Page 28
CBC-MAC (4 bytes, use MAC variant of MSR DUKPT key)
3.3.3.2 SRED Batch Data
Begin with a two-byte header in big-endian form (MSB first) that contains the expected length of the
message after decryption, excluding data padding and CBC-MAC. Use container F9 for the MAC
structure, use F8 within FA for passing encrypted batch data message, use MAC variant of MSR DUKPT
key.
AAAA /* 2-byte MSB message length excluding padding and CBC-MAC */
F9 /* container for MAC structure and generic data */
DFDF54(MAC KSN)
DFDF55(MAC Encryption Type)
DFDF25(IFD Serial Number)
FA/* container for generic data */
F0 /* Transaction Results */
F1 /* container for Status Data */
… /* Status Data tags */
F8 /* container tag for encryption */
DFDF59(Encrypted Data Primative)
Data val (Decrypt data to read tags)>
DFDF56(Encrypted Transaction Data KSN)
DFDF57(Encrypted Transaction Data Encryption
Type)
DFDF58(# of bytes of padding in DFDF59)
F7/* container for Merchant Data */
… /* < Merhcant Data tags */
(Buffer if any to be a multiple of 8 bytes)
CBC-MAC (4 bytes, use MAC variant of MSR DUKPT key)
The Value inside tag DFDF59 is encrypted and contains the following after decryption:
FC/* container for encrypted generic data */
F2/* container for Batch Data */
… /* Batch Data tags */
F3/* container for Reversal Data, if any */
… /* Reversal Data tags */
Notes:
1 - ARQC request encrypted message: 70 F8
2 - Batch data includes batch and merchant data and for declined transactions, reversal data as well.