Command 0X0F - Login/Authenticate Or Logout - Magtek DynaPro Go Programmer's Manual

4 - Command Set

4.3.14 Command 0x0F - Login/Authenticate or Logout

The host uses this command to perform mutual authentication with the device (log in) or to revoke
authentication (log out). If the Device Control byte returned from Command 0x09 - Set / Get Device
Configuration has the bit set for Mutual Authentication Required, the host must successfully call this
command to bring the device out of the
If mutual authentication is required, the host must follow these steps to initiate mutual authentication:
1) Request a mutual authentication token from the device using Command 0x0B - Get Challenge.
2) Decrypt the received token using the Mutual Authentication Key to create an 8-byte decrypted token.
3) Create an 8-byte transformed token from the decrypted token as follows:
a) Split the token into a first half-token and a last half-token.
b) Add 0x55555555 to the last half-token in little-endian format, truncate off the carry (if any) to
get 4 bytes, and use the result as the beginning of the transformed token.
c) Append the first half-token to the end to form the full transformed token.
4) Encrypt the transformed token with the Mutual Authentication Key to create an encrypted
transformed token.
5) Call the Login / Authenticate form of this command.
If an error occurs, the device terminates the command and reports the error in ACKSTS of Command
0x01 - Response ACK. For a full list of error codes, see Command 0x01 - Response ACK.
Table 4-18 - Usage Table for Command 0x0F Login/Authenticate or Logout
Bit 7
Byte 0 0x0F
0x00 = Logout
Byte 1
0x01 = Login / Authenticate
If logging in, encrypted transformed token (8 bytes). See Command 0x0B - Get Challenge.
Bytes 2..9
If logging out, Reserved.
DynaPro Go| Handheld PIN Pad Device with MSR/Contact/Contactless | Programmer's Manual (COMMANDS)
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