Magtek DynaPro Mini Programmer's Manual page 93

Appendix A - Examples
The value of data object F0 (transaction results) begins with tag F1, which Appendix D MagTek
Custom EMV Tags and section 3.6.6 indicate is status data. Its length is a single byte 0x05, giving the
value DFDF1A0100.
The value of data object F0 (transaction results) continues with tag F8 (container tag for encryption),
length 0x82010E, giving a 270 byte value:
DFDF598200F08569A27E2A2A9D7E67A96624D10DBE3F366EC3F31C4072676FEF43213A
F3C76ABE06A6E90F10E1650BE4ECE9CF64E9143129F66B44E8C4A697CA5A0E319D933B
F9BBC52B2DAF8FCC663354E2B0E545A5002F4A0C976E65DD23705AB36ECA78D6A6B992
43F2C2B907A8F1F2A66D5558096D7B1F91F1B6C06BF68841098EEABA502A57A3AA2F13
44C4E405B86C3D64FB93E638D821409493659966A247238109C0E117B669B74A550826
1B8E8AFF3FFE68058C334B383D991EAE3C8F5594FBFB9118860FF67344F37DE54EA5F2
8BFECF8378072A9FAE3A61FEF13254B6C7B2C1D0AF626E5A14F19C025B7CD1EF1456A3
1DDFDF560A9500030000000120039DDFDF570180DFDF580106
The value of data object F8 begins with tag DFDF59 (encrypted data primitive), length 0x8200F0,
giving a 240 byte value containing encrypted data:
8569A27E2A2A9D7E67A96624D10DBE3F366EC3F31C4072676FEF43213AF3C76ABE06A6
E90F10E1650BE4ECE9CF64E9143129F66B44E8C4A697CA5A0E319D933BF9BBC52B2DAF
8FCC663354E2B0E545A5002F4A0C976E65DD23705AB36ECA78D6A6B99243F2C2B907A8
F1F2A66D5558096D7B1F91F1B6C06BF68841098EEABA502A57A3AA2F1344C4E405B86C
3D64FB93E638D821409493659966A247238109C0E117B669B74A5508261B8E8AFF3FFE
68058C334B383D991EAE3C8F5594FBFB9118860FF67344F37DE54EA5F28BFECF837807
2A9FAE3A61FEF13254B6C7B2C1D0AF626E5A14F19C025B7CD1EF1456A31D
This data must be decrypted (described later) to read the remaining TLV data inside it.
After the encrypted data primitive, the value of data object F8 continues with:
DFDF560A9500030000000120039DDFDF570180DFDF580106
This breaks down into tag DFDF56 (encrypted transaction data KSN), length 0x0A giving 10 byte value
9500030000000120039D, tag DFDF57 (encrypted transaction data encryption type), length 0x01,
value 0x80 (DUKPT key), and tag DFDF58 (number of bytes padding in DFDF59), length 0x01, value
0x06.
To decrypt the value from data object DFDF59 above, use the data key variant and the KSN from
DFDF56 above (9500030000000120039D) and the ANSI test key to perform 3DES-DUKPT
decryption on the value. For details about the decryption algorithm, see ANSI X9.24. In this case, the
value decrypts and parses as:
Tag
82 (EMV Application Interchange Profile)
8E (CVM)
DynaPro Mini| PIN Encryption Device | Programmer's Manual (Commands)
Length
0002 5800
0010 000000000000000042015E0342031F03
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Value