sc_get_data3openscsc_get_dataGet a primitive data object from a cardSynopsis
#include <opensc.h>
int sc_get_data(sc_card_t *card, unsigned int tag,
unsigned char *buf, size_t buflen);
Description
This function is used to retrieve a primitive data object from
card. It corresponds to the GET DATA command in the
ISO 7816 standard. The data is stored in
buf, which is buflen bytes long.
The tag parameter specifies the object to be retrieved.
Refer to the standard for the correct values to use.
Return value
Returns 0 if successful, or a negative value in case of error.