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<len> /* container for MAC structure and generic data */
DFDF54(MAC KSN)<len><val>
DFDF55(MAC Encryption Type)<len><val>
DFDF25(IFD Serial Number)<len><val>
FA<len>/* container for generic data */
F0<len> /* Transaction Results */
F1<len> /* container for Status Data */
… /* Status Data tags */
F8<len> /* container tag for encryption */
DFDF59(Encrypted Data Primative)<len><Encrypted
Data val (Decrypt data to read tags)>
DFDF56(Encrypted Transaction Data KSN)<len><val>
DFDF57(Encrypted Transaction Data Encryption
Type)<val>
DFDF58(# of bytes of padding in DFDF59)<len><val>
F7<len>/* 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<len>/* container for encrypted generic data */
F2<len>/* container for Batch Data */
… /* Batch Data tags */
F3<len>/* container for Reversal Data, if any */
… /* Reversal Data tags */
Notes:
1 - ARQC request encrypted message: 70<len> F8 <len><encrypted data>
2 - Batch data includes batch and merchant data and for declined transactions, reversal data as well.