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TeapotApplet

A very simple "Hello world" class that doesn't use any PIN protection or secure communication. It can only store up to 254 bytes of data and give it back on request. Perfect for testing communication with the card.

By default the phrase is I am a teapot gimme some tea plz.

Maximum storage size - 254 bytes.

APDUs

Applet ID: B00B5111CA01

To select the applet use SELECT APDU: 00A4040006B00B5111CA0100

Get data

Field Value
CLA 0xB0
INS 0xA1
P0, P1 ignored, use for example 0x00 for both
DATA ignored
RETURN SW: 0x9000, DATA: data stored in the card

Example: B0A10000 -> returns stored data

Store data

Field Value
CLA 0xB0
INS 0xA2
P0, P1 ignored, use for example 0x00 for both
DATA data to store on the card, 254 bytes max
RETURN SW: 0x9000, DATA: updated data stored on the card
ERRORS SW: 0x6700 (ISO7816.SW_WRONG_LENGTH) if data is more than 254 bytes

Example: B0A20000<len><data>

  • Data: shiny teapot taking care of your secrets
  • Data in hex: 7368696e7920746561706f742074616b696e672063617265206f6620796f75722073656372657473
  • Data length: 40 (0x28)
  • APDU: B0A20000287368696e7920746561706f742074616b696e672063617265206f6620796f75722073656372657473