Smart card ATR parsing

Enter an ATR (Answer To Reset) and I will parse it for you.

Results

Parsing ATR:

3B D5 18 FF 81 91 FE 1F C3 80 73 C8 21 10 0A
TS = 0x3BDirect Convention
T0 = 0xD5Y(1): b1101, K: 5 (historical bytes)
TA(1) = 0x18Fi=372, Di=12, 31 cycles/ETU (129032 bits/s at 4.00 MHz, 161290 bits/s for fMax=5 MHz)
TC(1) = 0xFFExtra guard time: 255 (special value)
TD(1) = 0x81Y(i+1) = b1000, Protocol T=1
----
TD(2) = 0x91Y(i+1) = b1001, Protocol T=1
----
TA(3) = 0xFEIFSC: 254
TD(3) = 0x1FY(i+1) = b0001, Protocol T=15
----
TA(4) = 0xC3Clock stop: no preference - Class accepted by the card: (3G) A 5V B 3V
----
Historical bytes80 73 C8 21 10
Category indicator byte: 0x80 (compact TLV data object)
Tag: 7, Len: 3 (card capabilities)
Selection methods: 200
- Implicit DF selection
- DF selection by partial DF name
- DF selection by full DF name
Data coding byte: 33
- Behaviour of write functions: proprietary
- Value 'FF' for the first byte of BER-TLV tag fields: invalid
- Data unit in quartets: 1
Command chaining, length fields and logical channels: 16
- Logical channel number assignment: by the card
- Maximum number of logical channels: 1
TCK = 0x0Acorrect checksum

Possibly identified card:

3B D5 18 FF 81 91 FE 1F C3 80 73 C8 21 10 0A

ComSign digital signature card (eID)

https://www.comsign.co.uk/

Canonical URL JSON output

Again

Submit another ATR


See also

The parsing code is part of pyscard and is available at parseATR.py.

The list of known ATR is also available online at smartcard_list.txt.

My blog contains a serie of artickes about ATR bytes.

More documentation: