int
sc_sm_single_transmit(struct sc_card *card, struct sc_apdu *apdu)
{
struct sc_context *ctx = card->ctx;
struct sc_apdu *sm_apdu = NULL;
int rv;
LOG_FUNC_CALLED(ctx);
sc_log(ctx, "SM_MODE:%X", card->sm_ctx.sm_mode);
if (!card->sm_ctx.ops.get_sm_apdu || !card->sm_ctx.ops.free_sm_apdu)
LOG_FUNC_RETURN(ctx, SC_ERROR_NOT_SUPPORTED);
/* get SM encoded APDU */
rv = card->sm_ctx.ops.get_sm_apdu(card, apdu, &sm_apdu);
if (rv == SC_ERROR_SM_NOT_APPLIED) {
/* SM wrap of this APDU is ignored by card driver.
* Send plain APDU to the reader driver */
rv = card->reader->ops->transmit(card->reader, apdu);
LOG_FUNC_RETURN(ctx, rv);
} else {
if (rv < 0)
sc_sm_stop(card);
}
LOG_TEST_RET(ctx, rv, "get SM APDU error");
/* check if SM APDU is still valid */
rv = sc_check_apdu(card, sm_apdu);
if (rv < 0) {
card->sm_ctx.ops.free_sm_apdu(card, apdu, &sm_apdu);
sc_sm_stop(card);
LOG_TEST_RET(ctx, rv, "cannot validate SM encoded APDU");
}
/* send APDU flagged as NO_SM */
sm_apdu->flags |= SC_APDU_FLAGS_NO_SM | SC_APDU_FLAGS_NO_RETRY_WL;
rv = sc_transmit_apdu(card, sm_apdu);
if (rv < 0) {
card->sm_ctx.ops.free_sm_apdu(card, apdu, &sm_apdu);
sc_sm_stop(card);
LOG_TEST_RET(ctx, rv, "unable to transmit APDU");
}
/* decode SM answer and free temporary SM related data */
rv = card->sm_ctx.ops.free_sm_apdu(card, apdu, &sm_apdu);
if (rv < 0)
sc_sm_stop(card);
LOG_FUNC_RETURN(ctx, rv);
}
int sc_transmit_apdu(sc_card_t *card, sc_apdu_t *apdu)
{
int r = SC_SUCCESS;
if (card == NULL || apdu == NULL)
return SC_ERROR_INVALID_ARGUMENTS;
LOG_FUNC_CALLED(card->ctx);
/* determine the APDU type if necessary, i.e. to use
* short or extended APDUs */
sc_detect_apdu_cse(card, apdu);
/* basic APDU consistency check */
r = sc_check_apdu(card, apdu);
if (r != SC_SUCCESS)
return SC_ERROR_INVALID_ARGUMENTS;
r = sc_lock(card); /* acquire card lock*/
if (r != SC_SUCCESS) {
sc_log(card->ctx, "unable to acquire lock");
return r;
}
if ((apdu->flags & SC_APDU_FLAGS_CHAINING) != 0) {
/* divide et impera: transmit APDU in chunks with Lc <= max_send_size
* bytes using command chaining */
size_t len = apdu->datalen;
const u8 *buf = apdu->data;
size_t max_send_size = card->max_send_size;
while (len != 0) {
size_t plen;
sc_apdu_t tapdu;
int last = 0;
tapdu = *apdu;
/* clear chaining flag */
tapdu.flags &= ~SC_APDU_FLAGS_CHAINING;
if (len > max_send_size) {
/* adjust APDU case: in case of CASE 4 APDU
* the intermediate APDU are of CASE 3 */
if ((tapdu.cse & SC_APDU_SHORT_MASK) == SC_APDU_CASE_4_SHORT)
tapdu.cse--;
/* XXX: the chunk size must be adjusted when
* secure messaging is used */
plen = max_send_size;
tapdu.cla |= 0x10;
tapdu.le = 0;
/* the intermediate APDU don't expect data */
tapdu.lc = 0;
tapdu.resplen = 0;
tapdu.resp = NULL;
} else {
plen = len;
last = 1;
}
tapdu.data = buf;
tapdu.datalen = tapdu.lc = plen;
r = sc_check_apdu(card, &tapdu);
if (r != SC_SUCCESS) {
sc_log(card->ctx, "inconsistent APDU while chaining");
break;
}
r = sc_transmit(card, &tapdu);
if (r != SC_SUCCESS)
break;
if (last != 0) {
/* in case of the last APDU set the SW1
* and SW2 bytes in the original APDU */
apdu->sw1 = tapdu.sw1;
apdu->sw2 = tapdu.sw2;
apdu->resplen = tapdu.resplen;
} else {
/* otherwise check the status bytes */
r = sc_check_sw(card, tapdu.sw1, tapdu.sw2);
if (r != SC_SUCCESS)
break;
}
len -= plen;
buf += plen;
}
} else
/* transmit single APDU */
r = sc_transmit(card, apdu);
/* all done => release lock */
if (sc_unlock(card) != SC_SUCCESS)
sc_log(card->ctx, "sc_unlock failed");
return r;
}
