Extended Command 0X030A - Read Acquirer Public Key Capk (Emv Oda Only) - Magtek mDynamo Programmer's Manual

7 - Commands

7.4.12 Extended Command 0x030A - Read Acquirer Public Key CAPK (EMV ODA 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 read back CA Public Keys. For details about the purpose of these keys, see
Extended Command 0x0309 - Modify Acquirer Public Key CAPK (MAC, EMV ODA Only).
Each CAPK database contains up to 51 key slots, each formatted as shown in Table 7-32.
Table 7-32 - Certificate Authority Public Key Slots 1 to 51 Data
Tag Value (hex)
DFDF79 00
DFDF7A 00
DFDF7B 00
DFDF7C 00
DFDF7D 00
Table 7-33 - Request Data for Extended Command 0x030A - Read Acquirer Public Key CAPK (EMV ODA
Only)
Offset Field Name
0 Slot Number
1 Operation
Database
2
Selector
3.. Tags to Read
Table 7-34 - Request Data for Extended Command 0x030A - Read Acquirer Public Key CAPK (EMV ODA
Only)
Offset Field Name
Message
0..1
Length
2.. Tags Read
mDynamo| OEM Secure Card Reader Authenticator | Programmer's Manual (COMMANDS)
Length (bytes)
0x01
0x01
0x01
0x01
0x01
CA Public Key Slot Number = Any value from 0x01 to 0x33 inclusive
0x00 = Read Operation
0x0F = Read All Tags of selected slot
(Contact Only)
0x00 = EMV Contact L2
Note: Not needed if Operation is 0x0F Read All Tags of selected slot.
FA<len> /* container for generic data */
<tag>
...
<tag>
Two byte binary, most significant byte first. This gives the total length of the
message that follows.
FA<len> /* container for generic data */
<tag><len><value>
...
<tag><len><value>
Page 82 of 167 (D998200151-200)
Max Length
0x05 CA Public Key RID
0x01 CA Public Key Index
0xF8 CA Public key Modulus
0x03 CA Public Key Exponent
0x14 CA Public Key Checksum
Value
Value
Description