Configure slot

Commits a configuration to one of two programmable slots. Slot 1 corresponds to the "short press" of the YubiKey button, and Slot 2 the "long press".

Available

Short press (slot 1): YubiKey firmware 1.x and later
Long press (slot 2): YubiKey firmware 2.0 and later

Note: Access over USB (CCID) disabled after YubiKey firmware 5.x

Command APDU info

CLA	INS	P1	P2	Lc	Data
0x00	0x01	(See below)	0x00	52	(see below)

P1: Slot

P1 determines which slot to program. It can have one of the following values:

Option	Value
Short press (Slot 1)	0x01
Long press (Slot 2)	0x03

Data: Configuration structure

The data field contains a standard configuration structure.

Field	Size	Description
Fixed Data	16	Fixed data in binary form.
UID	6	Fixed UID part of the ticket.
AES Key	16	AES key
Access Code	6	Access code to re-program the slot
EXT Flags	1	Extended flags
TKT Flags	1	Ticket configuration flags
CFG Flags	1	General configuration flags
Reserved	2	Must be zero
CRC	2	CRC16 value of all the fields

TBD page will go into more detail on how to construct a valid configuration.

Response APDU info

Lr	Data	SW1	SW1
0x06	Status structure	0x90	0x00

Examples

$ opensc-tool.exe -c default -r 1 -s 00:a4:04:00:08:a0:00:00:05:27:20:01:01 -s 00:01:01:00:34:de:ad:be:ef:
de:ad:be:ef:de:ad:be:ef:de:ad:be:ef:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
00:00:00:00:00:10:20:20:a0:00:00:2a:ac
Sending: 00 A4 04 00 08 A0 00 00 05 27 20 01 01
Received (SW1=0x90, SW2=0x00):
05 03 01 04 05 00 ......
Sending: 00 01 01 00 34 DE AD BE EF DE AD BE EF DE AD BE EF DE AD BE EF 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 20 20 A0 00 00 2A AC
Received (SW1=0x90, SW2=0x00):
05 03 01 05 05 00 ......