Card API (internal)

As part of the Reader Layer, the Calypsonet Terminal Card API defines the internal elements shared by the reader layer to implement specific card layers (like the Calypso Card layer).

Interfaces

APDU construction rules

APDU requests expected by the Card API must strictly comply with ISO/IEC 7816-3, requiring Case 4 commands, i.e containing ingoing and outgoing data, to include the Le field.

We strongly recommend setting this field to 00h.

Limitations & constraints

The Card API doesn’t allow to request the transmission to a card of the APDU commands “Select Application by DF Name” or “Get Response”:

• the selection of a specific card application could be managed only through a Card Selection Request.
• the APDU response status words 61XYh & 6CXYh are automatically handled by the reader layer library by issuing a Get Response or by re-issuing the previous command with the expected ‘Le’ field.