Command 0xEF01 - Load Key Using TR-31

The host uses this command to load a key into one of several available slots in the device’s secure memory.

Table - Device Key ID / Slot

ID	Label	Description	Load TK
1000	TMPTK	Temporary KBPK	agree
1001	MTK	Master Transport	TMPTK
1002	DEVTK	Device Master	MTK
1003	FINTK	Financial Master	MTK
1021	PRODTK	Production - MagTek Internal Only	DEVTK
1022	MFGTK	MagTek Only Internal/External	DEVTK
1081	MKIFTK	MagTek KIF Financial Keys	FINTK
1101	FREQMK	Factory Request MAC	PRODTK
1102	MREQMK	Mfg Device Request MAC	MFGTK
1111	MFRQMK	Mfg Financial Request MAC	MKIFTK
20xx	DKPTM0-1F	MagTek DUKPT Initial Key	MKIFTK

To inject a specific key in the above table, the corresponding Load TK shall be injected previously.

As shown in the table, MTK injection requires that a TMPTK has been created. See Command 0xF017 - Establish Ephemeral KBPK.

After MTK has been injected successfully, the sequence of injecting other keys is as follows:

1

Establish a secure session (Get Challenge)

The host uses Command 0xE001 - Get Challenge to establish a secure session with the device.

2

Construct TR-31 key block

The host constructs a TR-31 (X9.143) key block for the key it is going to load. (Note that the Load Key must be injected previously.)

3

Construct command request

The host constructs the command request for Command 0xEF01 - Load Key Using TR-31 in the format below.

4

Send the command

The host sends the command request to the device.

5

Device response

The device sends a response in the format below to the host.

Table - Request Data for Command 0xEF01 - Load Key Using TR-31

Tag	Len	Value / Description	Typ	Req	Default
Beginning of any wrappers, at minimum including Request Message
EF01 = Command 0xEF01 - Load Key Using TR-31
84	var	Key Block — This is a populated, secured MIFARE Card Data Type (EMV Contactless Only) Table 53 – MIFARE Card Data Type	B	R
DFDFDF40	var	MIFARE Card Data in ASCII terminated with NULL character
DFDFDF41	var	MIFARE Card Data in Binary (optional)			O
TR-31 Key Block Type.
End of any wrappers, at minimum including Request Message

Table - Response Data for Command 0xEF01 - Load Key Using TR-31

Tag	Len	Value / Description	Typ	Req	Default
Beginning of any wrappers, at minimum including Response Message
EF01 = Command 0xEF01 - Load Key Using TR-31
No parameters.
End of any wrappers, at minimum including Response Message

Table - Request Example

Example (Hex)

AA 00 81 04 01 1A EF 01 84 82 01 36 EF 01 84 82 01 30 44 30 33 30 34 42 31 54 58 30 30 
4E 30 36 30 30 49 4B 31 38 46 46 46 46 39 38 37 36 35 34 33 32 31 30 33 30 30 30 30 30 
32 31 35 38 4D 47 54 4B 31 30 30 31 54 31 31 30 34 32 30 30 37 31 32 30 34 31 30 38 31 
32 31 30 34 30 30 33 46 33 31 30 37 42 35 30 41 46 44 32 33 32 31 30 43 39 33 36 31 39 
44 44 41 41 32 31 33 36 43 37 33 33 31 30 32 30 32 30 31 32 30 34 54 31 37 31 36 33 30 
5A 4B 50 30 45 30 31 39 33 36 46 41 33 32 45 4B 43 30 41 30 30 34 35 30 30 54 53 31 34 
32 30 32 30 30 39 30 32 54 31 35 35 38 30 32 5A 50 42 30 34 35 37 32 31 37 46 33 34 37 
31 34 43 32 42 38 38 46 33 39 35 35 32 32 32 46 46 35 39 41 41 30 35 37 44 39 39 41 46 
38 32 41 37 35 37 32 46 39 33 38 46 38 33 38 42 43 36 35 45 45 35 34 46 39 34 37 46 35 
39 41 30 36 43 44 34 35 35 31 39 32 32 37 41 32 35 35 43 37 44 35 44 37 43 38 36 37 34 
35 30 33 46 41 43 36 46 41 37 31 33 32 43 38 46 41 39 39 36 42 34 45 42 36 41 41 31 31 
34 46 45

Table - Response Example

Response Example (Hex)

AA 00 81 04 82 1A EF 01 82 04 00 00 00 00