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-rw-r--r--src/sim/reader.c271
1 files changed, 271 insertions, 0 deletions
diff --git a/src/sim/reader.c b/src/sim/reader.c
new file mode 100644
index 00000000..160f1758
--- /dev/null
+++ b/src/sim/reader.c
@@ -0,0 +1,271 @@
+/* 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;
+
+ /* 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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