NAME
sc_get_data - Get a primitive data object from a card
SYNOPSIS
#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.