8 - Commands
eDynamo| Secure Card Reader Authenticator | Programmer’s Manual (COMMANDS)
Page 75 of 245 (
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8.3.7
Command 0x11 - Activation Challenge Response (MSR Only)
This command is used as the second part of an Activate Authentication sequence following
0x10 - Activate Authenticated Mode
. In this command, the host software sends the first 6 bytes of
Challenge 1 (received in response to
Command 0x10 - Activate Authenticated Mode
) plus two bytes of
timeout information, and (optionally) an eight byte Session ID encrypted with the a custom variant of the
current DUKPT Key (Key XOR 3C3C 3C3C 3C3C 3C3C 3C3C 3C3C 3C3C 3C3C).
The time information contains the maximum number of seconds the device should remain in
Authenticated Mode. Regardless of the value of this timer, a card swipe in the Authenticated Mode ends
the Authenticated Mode. The maximum time allowed is 3600 seconds (one hour). For example, for a full
hour, use
0x0E10
; for 3 minutes, use
0x012C
. A value of
0x00
forces the device to stay in
Authenticated Mode until a card swipe or power down occurs (no timeout).
If the host includes Session ID information and the command is successful, it changes the Session ID in
the device in the same way as calling
If the device decrypts the Challenge Response correctly, Activate Authenticated Mode has succeeded. If
the device can not decrypt the Challenge Response correctly, Activate Authenticated Mode fails and the
TDES DUKPT Key Serial Number advances.
Table 8-13 - Request Data for Command 0x11 - Activation Challenge Response (MSR Only)
Offset
Field Name
Description
0
Response to
Challenge 1
First 6 bytes of Challenge 1 plus a two-byte timeout (MSB first), encrypted
by the specified variant of the current DUKPT Key.
8
Session ID
Optional eight byte Session ID encrypted by the specified variant of the
current DUKPT Key.
Response Data: None
Result codes:
0x00 = Success
0x02 = Bad Parameters - the Data field in the request is not a correct length
0x04 = Bad Data - the encrypted reply data could not be verified
0x07 = Sequence - not expecting this command
Example Request (Hex)
Cmd Num
Data Len
Data
11
08
8579827521573495
Example Response (Hex)
Result Code
Data Len
Data
00
00
