Extended Command 0X0309 - Modify Acquirer Public Key Capk (Mac, Emv Offline Only) - Magtek eDynamo Programmer's Manual

8 - Commands
8.5.5 Extended Command 0x0309 - Modify Acquirer Public Key CAPK (MAC, EMV Offline
Only)
Like all extended commands, the host initiates this command by calling Command 0x49 - Send
Extended Command Packet (Extended Commands Only), and receives a response as documented
there.
This command is used to modify CA Public Keys. See Extended Command 0x030A - Read Acquirer
Public Key CAPK (EMV Offline Only) for details about storage of keys.
Configuration changes will be lost after a power cycle or reset unless the host sends Extended
Command 0x030E - Commit Configuration after making all configuration changes.
Table 8-47 - Request Data for Extended Command 0x0309 - Modify Acquirer Public Key CAPK (MAC,
EMV Offline Only)
Offset Field Name
0 Type of MAC
1 Slot Number
2 Operation
Database
3
Selector
Device Serial
4..19 Number
(DSN)
Objects to
20..n
Write
n..n+3 MAC
eDynamo| Secure Card Reader Authenticator | Programmer's Manual (COMMANDS)
MAC algorithm designator
0x00 = MSV5 MSCI CBC-MAC
CA Public Key Slot Number = Any value from 0x01 to 0x33 inclusive
0xFF = Next Available (slot with RID TLV length set to zero)
If the Operation field is set to Erase All, this field is not used and can be set to
any value.
0x00 = Erase All (Erases all tags in all CAPK slots). This sets the TLV length
of every TLV data object in each slot to 1 and the value to 0. A slot is
considered erased and available for use by the Next Available Slot Number
(0xFF) if its RID TLV length is set to 1 and its value is set to 0.
0x01 = Writes a CA Public Key. To erase a single slot, write all of the slot's
tags' TLV lengths to 1 and values to 0.
(Contact Only)
0x00 = EMV Contact L2
16 Bytes DSN
Note: Not needed if Operation is 0x00 Erase All.
FA<len> /* container for generic data */
< DFDF79><len><value> /* RID */
< DFDF7A><len><value>/* Index */
< DFDF7B><len><value>/* Modulus */
< DFDF7C><len><value>/* Key Exponent */
< DFDF7D><len><value> /* Checksum */
MAC computed on Device Serial Number (DSN) and Objects to Write fields.
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