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/* Card reader abstraction for libosmosim */
/*
* (C) 2012 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <netinet/in.h>
#include <osmocom/core/msgb.h>
#include <osmocom/sim/sim.h>
#include "sim_int.h"
/* remove the SW from end of the message */
static int get_sw(struct msgb *resp)
{
int ret;
if (!msgb_apdu_de(resp) || msgb_apdu_le(resp) < 2)
return -EIO;
ret = msgb_get_u16(resp);
return ret;
}
/* According to ISO7816-4 Annex A */
static int transceive_apdu_t0(struct osim_card_hdl *st, struct msgb *amsg)
{
struct osim_reader_hdl *rh = st->reader;
struct msgb *tmsg = msgb_alloc(1024, "TPDU");
struct osim_apdu_cmd_hdr *tpduh;
uint8_t *cur;
uint16_t sw;
int rc, num_resp = 0;
if (!tmsg)
return -ENOMEM;
/* create TPDU header from APDU header */
tpduh = (struct osim_apdu_cmd_hdr *) msgb_put(tmsg, sizeof(*tpduh));
memcpy(tpduh, msgb_apdu_h(amsg), sizeof(*tpduh));
switch (msgb_apdu_case(amsg)) {
case APDU_CASE_1:
tpduh->p3 = 0x00;
break;
case APDU_CASE_2S:
tpduh->p3 = msgb_apdu_le(amsg);
break;
case APDU_CASE_2E:
if (msgb_apdu_le(amsg) <= 256) {
/* case 2E.1 */
tpduh->p3 = msgb_apdu_le(amsg) & 0xff;
} else {
/* case 2E.2 */
tpduh->p3 = 0;
msgb_put_u16(tmsg, msgb_apdu_le(amsg));
}
break;
case APDU_CASE_3S:
case APDU_CASE_4S:
tpduh->p3 = msgb_apdu_lc(amsg);
cur = msgb_put(tmsg, tpduh->p3);
memcpy(cur, msgb_apdu_dc(amsg), tpduh->p3);
break;
case APDU_CASE_3E:
case APDU_CASE_4E:
if (msgb_apdu_lc(amsg) < 256) {
/* Case 3E.1 */
tpduh->p3 = msgb_apdu_lc(amsg);
} else {
/* Case 3E.2 */
/* FXIME: Split using ENVELOPE! */
return -1;
}
break;
}
transceive_again:
/* store pointer to start of response */
tmsg->l3h = tmsg->tail;
/* transceive */
rc = rh->ops->transceive(st->reader, tmsg);
if (rc < 0) {
msgb_free(tmsg);
return rc;
}
msgb_apdu_sw(tmsg) = get_sw(tmsg);
/* increase number of responsese received */
num_resp++;
/* save SW */
sw = msgb_apdu_sw(tmsg);
printf("sw = 0x%04x\n", sw);
msgb_apdu_sw(amsg) = sw;
switch (msgb_apdu_case(amsg)) {
case APDU_CASE_1:
case APDU_CASE_3S:
/* just copy SW */
break;
case APDU_CASE_2S:
case_2s:
switch (sw >> 8) {
case 0x67: /* Case 2S.2: Le definitely not accepted */
break;
case 0x6c: /* Case 2S.3: Le not accepted, La indicated */
tpduh->p3 = sw & 0xff;
/* re-issue the command with La as */
goto transceive_again;
break;
case 0x90:
/* Case 2S.1, fall-through */
case 0x91: case 0x92: case 0x93: case 0x94: case 0x95:
case 0x96: case 0x97: case 0x98: case 0x99: case 0x9a:
case 0x9b: case 0x9c: case 0x9d: case 0x9e: case 0x9f:
/* Case 2S.4 */
/* copy response data over */
cur = msgb_put(amsg, msgb_l3len(tmsg));
memcpy(cur, tmsg->l3h, msgb_l3len(tmsg));
}
break;
case APDU_CASE_4S:
/* FIXME: this is 4S.2 only for 2nd... response: */
if (num_resp >= 2)
goto case_2s;
switch (sw >> 8) {
case 0x60: case 0x62: case 0x63: case 0x64: case 0x65:
case 0x66: case 0x67: case 0x68: case 0x69: case 0x6a:
case 0x6b: case 0x6c: case 0x6d: case 0x6e: case 0x6f:
/* Case 4S.1: Command not accepted: just copy SW */
break;
case 0x90:
/* case 4S.2: Command accepted */
tpduh->ins = 0xC0;
tpduh->p1 = tpduh->p2 = 0;
tpduh->p3 = msgb_apdu_le(amsg);
/* strip off current result */
msgb_get(tmsg, msgb_length(tmsg)-sizeof(*tpduh));
goto transceive_again;
break;
case 0x61: /* Case 4S.3: command accepted with info added */
case 0x9F: /* FIXME: This is specific to SIM cards */
tpduh->ins = 0xC0;
tpduh->p1 = tpduh->p2 = 0;
tpduh->p3 = OSMO_MIN(msgb_apdu_le(amsg), sw & 0xff);
/* strip off current result */
msgb_get(tmsg, msgb_length(tmsg)-sizeof(*tpduh));
goto transceive_again;
break;
}
/* Case 4S.2: Command accepted: just copy SW */
/* Case 4S.4: Just copy SW */
break;
case APDU_CASE_2E:
if (msgb_apdu_le(amsg) <= 256) {
/* Case 2E.1: Le <= 256 */
goto case_2s;
}
switch (sw >> 8) {
case 0x67:
/* Case 2E.2a: wrong length, abort */
break;
case 0x6c:
/* Case 2E.2b: wrong length, La given */
tpduh->p3 = sw & 0xff;
/* re-issue the command with La as given */
goto transceive_again;
break;
case 0x90:
/* Case 2E.2c: */
break;
case 0x61:
/* Case 2E.2d: more data available */
/* FIXME: issue yet another GET RESPONSE */
break;
}
break;
case APDU_CASE_3E:
/* FIXME: handling for ENVELOPE splitting */
break;
case APDU_CASE_4E:
break;
}
msgb_free(tmsg);
/* compute total length of response data */
msgb_apdu_le(amsg) = amsg->tail - msgb_apdu_de(amsg);
return sw;
}
/* FIXME: T=1 According to ISO7816-4 Annex B */
int osim_transceive_apdu(struct osim_chan_hdl *st, struct msgb *amsg)
{
switch (st->card->proto) {
case OSIM_PROTO_T0:
return transceive_apdu_t0(st->card, amsg);
default:
return -ENOTSUP;
}
}
struct osim_reader_hdl *osim_reader_open(enum osim_reader_driver driver, int idx,
const char *name, void *ctx)
{
const struct osim_reader_ops *ops;
struct osim_reader_hdl *rh;
switch (driver) {
case OSIM_READER_DRV_PCSC:
ops = &pcsc_reader_ops;
break;
default:
return NULL;
}
rh = ops->reader_open(idx, name, ctx);
if (!rh)
return NULL;
rh->ops = ops;
/* FIXME: for now we only do T=0 on all readers */
rh->proto_supported = (1 << OSIM_PROTO_T0);
return rh;
}
struct osim_card_hdl *osim_card_open(struct osim_reader_hdl *rh, enum osim_proto proto)
{
struct osim_card_hdl *ch;
if (!(rh->proto_supported & (1 << proto)))
return NULL;
ch = rh->ops->card_open(rh, proto);
if (!ch)
return NULL;
ch->proto = proto;
return ch;
}
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