root/trunk/src/libopensc/card-default.c

/*
 * card-default.c: Support for cards with no driver
 *
 * Copyright (C) 2001, 2002  Juha YrjölÀ <juha.yrjola@iki.fi>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "internal.h"
#include <string.h>

static struct sc_card_operations default_ops;
static struct sc_card_driver default_drv = {
        "Default driver for unknown cards",
        "default",
        &default_ops,
        NULL, 0, NULL
};

static int default_finish(sc_card_t *card)
{
        return 0;
}

static int default_match_card(sc_card_t *card)
{
        return 1;               /* always match */
}

static int autodetect_class(sc_card_t *card)
{
        int classes[] = { 0x00, 0xC0, 0xB0, 0xA0 };
        int class_count = sizeof(classes)/sizeof(int);
        u8 rbuf[SC_MAX_APDU_BUFFER_SIZE];
        sc_apdu_t apdu;
        int i, r;

        if (card->ctx->debug >= 2)
                sc_debug(card->ctx, "autodetecting CLA byte\n");
        for (i = 0; i < class_count; i++) {
                if (card->ctx->debug >= 2)
                        sc_debug(card->ctx, "trying with 0x%02X\n", classes[i]);
                memset(&apdu, 0, sizeof(apdu));
                apdu.cla = classes[i];
                apdu.cse = SC_APDU_CASE_2_SHORT;
                apdu.ins = 0xC0;
                apdu.p1 = apdu.p2 = 0;
                apdu.datalen = 0;
                apdu.lc = 0;
                apdu.le = 256;
                apdu.resp = rbuf;
                apdu.resplen = sizeof(rbuf);
                r = sc_transmit_apdu(card, &apdu);
                SC_TEST_RET(card->ctx, r, "APDU transmit failed");
                if (apdu.sw1 == 0x6E)
                        continue;
                if (apdu.sw1 == 0x90 && apdu.sw2 == 0x00)
                        break;
                if (apdu.sw1 == 0x61)
                        break;
                if (card->ctx->debug >= 2)
                        sc_debug(card->ctx, "got strange SWs: 0x%02X 0x%02X\n",
                              apdu.sw1, apdu.sw2);
                break;
        }
        if (i == class_count)
                return -1;
        card->cla = classes[i];
        if (card->ctx->debug >= 2)
                sc_debug(card->ctx, "detected CLA byte as 0x%02X\n", card->cla);
        if (apdu.resplen < 2) {
                if (card->ctx->debug >= 2)
                        sc_debug(card->ctx, "SELECT FILE returned %d bytes\n",
                              apdu.resplen);
                return 0;
        }
        if (rbuf[0] == 0x6F) {
                if (card->ctx->debug >= 2)
                        sc_debug(card->ctx, "SELECT FILE seems to behave according to ISO 7816-4\n");
                return 0;
        }
        if (rbuf[0] == 0x00 && rbuf[1] == 0x00) {
                struct sc_card_driver *drv;
                if (card->ctx->debug >= 2)
                        sc_debug(card->ctx, "SELECT FILE seems to return Schlumberger 'flex stuff\n");
                drv = sc_get_cryptoflex_driver();
                card->ops->select_file = drv->ops->select_file;
                return 0;
        }
        return 0;
}

static int default_init(sc_card_t *card)
{
        int r;
        
        card->name = "Unidentified card";
        card->drv_data = NULL;
        r = autodetect_class(card);
        if (r) {
                sc_error(card->ctx, "unable to determine the right class byte\n");
                return SC_ERROR_INVALID_CARD;
        }

        return 0;
}

static struct sc_card_driver * sc_get_driver(void)
{
        struct sc_card_driver *iso_drv = sc_get_iso7816_driver();

        default_ops = *iso_drv->ops;
        default_ops.match_card = default_match_card;
        default_ops.init = default_init;
        default_ops.finish = default_finish;

        return &default_drv;
}

#if 1
struct sc_card_driver * sc_get_default_driver(void)
{
        return sc_get_driver();
}
#endif