HOTP AUTHENTICATE
Command Description
This command performs an HOTP HMAC-based One-time Password algorithm authentication operation. This command is sent automatically when the button of the HID Crescendo Key is pressed.
Note: This only applies to the HID Crescendo key. It does not apply to the HID Crescendo 2300 card.
Command Message
The following table lists the coding for the OATH AUTHENTICATE command message.
|
CLA |
80h |
|
INS |
88h |
|
P1 |
00h |
|
P2 |
00h |
|
Lc |
00h |
|
Data Field |
Empty |
|
Le |
00h |
Data Field Sent in the Command Message
The Data Field is always empty.
Response Message
Data Field Returned in the Response Message
The data field in the response message contains the HOTP authentication code.
For example, for an HOTP result equal to 755224, the response will be:
|
RD0 |
75h |
|
RD1 |
52h |
|
RD2 |
24h |
Processing State Returned in the Response Message
| Status | Meaning |
|---|---|
|
9000h |
Successful execution: No more data available |
| 6985 |
LED of the device blinks to indicate that the device is waiting for the end user to press the button to get the OTP Important: A polling request is required to resend the command until the OTP is returned with 9000.
|
