[mirror_qemu.git] / hw / usb / ccid-card-passthru.c

/*
 * CCID Passthru Card Device emulation
 *
 * Copyright (c) 2011 Red Hat.
 * Written by Alon Levy.
 *
 * This work is licensed under the terms of the GNU GPL, version 2.1 or later.
 * See the COPYING file in the top-level directory.
 */

#include "sysemu/char.h"
#include "qemu/error-report.h"
#include "qemu/sockets.h"
#include "monitor/monitor.h"
#include "ccid.h"
#include "libcacard/vscard_common.h"

#define DPRINTF(card, lvl, fmt, ...)                    \
do {                                                    \
    if (lvl <= card->debug) {                           \
        printf("ccid-card-passthru: " fmt , ## __VA_ARGS__);     \
    }                                                   \
} while (0)

#define D_WARN 1
#define D_INFO 2
#define D_MORE_INFO 3
#define D_VERBOSE 4

/* TODO: do we still need this? */
static const uint8_t DEFAULT_ATR[] = {
/*
 * From some example somewhere
 * 0x3B, 0xB0, 0x18, 0x00, 0xD1, 0x81, 0x05, 0xB1, 0x40, 0x38, 0x1F, 0x03, 0x28
 */

/* From an Athena smart card */
 0x3B, 0xD5, 0x18, 0xFF, 0x80, 0x91, 0xFE, 0x1F, 0xC3, 0x80, 0x73, 0xC8, 0x21,
 0x13, 0x08
};


#define PASSTHRU_DEV_NAME "ccid-card-passthru"
#define VSCARD_IN_SIZE 65536

/* maximum size of ATR - from 7816-3 */
#define MAX_ATR_SIZE        40

typedef struct PassthruState PassthruState;

struct PassthruState {
    CCIDCardState base;
    CharDriverState *cs;
    uint8_t  vscard_in_data[VSCARD_IN_SIZE];
    uint32_t vscard_in_pos;
    uint32_t vscard_in_hdr;
    uint8_t  atr[MAX_ATR_SIZE];
    uint8_t  atr_length;
    uint8_t  debug;
};

/*
 * VSCard protocol over chardev
 * This code should not depend on the card type.
 */

static void ccid_card_vscard_send_msg(PassthruState *s,
        VSCMsgType type, uint32_t reader_id,
        const uint8_t *payload, uint32_t length)
{
    VSCMsgHeader scr_msg_header;

    scr_msg_header.type = htonl(type);
    scr_msg_header.reader_id = htonl(reader_id);
    scr_msg_header.length = htonl(length);
    qemu_chr_fe_write(s->cs, (uint8_t *)&scr_msg_header, sizeof(VSCMsgHeader));
    qemu_chr_fe_write(s->cs, payload, length);
}

static void ccid_card_vscard_send_apdu(PassthruState *s,
    const uint8_t *apdu, uint32_t length)
{
    ccid_card_vscard_send_msg(
        s, VSC_APDU, VSCARD_MINIMAL_READER_ID, apdu, length);
}

static void ccid_card_vscard_send_error(PassthruState *s,
                    uint32_t reader_id, VSCErrorCode code)
{
    VSCMsgError msg = {.code = htonl(code)};

    ccid_card_vscard_send_msg(
        s, VSC_Error, reader_id, (uint8_t *)&msg, sizeof(msg));
}

static void ccid_card_vscard_send_init(PassthruState *s)
{
    VSCMsgInit msg = {
        .version = htonl(VSCARD_VERSION),
        .magic = VSCARD_MAGIC,
        .capabilities = {0}
    };

    ccid_card_vscard_send_msg(s, VSC_Init, VSCARD_UNDEFINED_READER_ID,
                         (uint8_t *)&msg, sizeof(msg));
}

static int ccid_card_vscard_can_read(void *opaque)
{
    PassthruState *card = opaque;

    return VSCARD_IN_SIZE >= card->vscard_in_pos ?
           VSCARD_IN_SIZE - card->vscard_in_pos : 0;
}

static void ccid_card_vscard_handle_init(
    PassthruState *card, VSCMsgHeader *hdr, VSCMsgInit *init)
{
    uint32_t *capabilities;
    int num_capabilities;
    int i;

    capabilities = init->capabilities;
    num_capabilities =
        1 + ((hdr->length - sizeof(VSCMsgInit)) / sizeof(uint32_t));
    init->version = ntohl(init->version);
    for (i = 0 ; i < num_capabilities; ++i) {
        capabilities[i] = ntohl(capabilities[i]);
    }
    if (init->magic != VSCARD_MAGIC) {
        error_report("wrong magic");
        /* we can't disconnect the chardev */
    }
    if (init->version != VSCARD_VERSION) {
        DPRINTF(card, D_WARN,
            "got version %d, have %d", init->version, VSCARD_VERSION);
    }
    /* future handling of capabilities, none exist atm */
    ccid_card_vscard_send_init(card);
}

static int check_atr(PassthruState *card, uint8_t *data, int len)
{
    int historical_length, opt_bytes;
    int td_count = 0;
    int td;

    if (len < 2) {
        return 0;
    }
    historical_length = data[1] & 0xf;
    opt_bytes = 0;
    if (data[0] != 0x3b && data[0] != 0x3f) {
        DPRINTF(card, D_WARN, "atr's T0 is 0x%X, not in {0x3b, 0x3f}\n",
                data[0]);
        return 0;
    }
    td_count = 0;
    td = data[1] >> 4;
    while (td && td_count < 2 && opt_bytes + historical_length + 2 < len) {
        td_count++;
        if (td & 0x1) {
            opt_bytes++;
        }
        if (td & 0x2) {
            opt_bytes++;
        }
        if (td & 0x4) {
            opt_bytes++;
        }
        if (td & 0x8) {
            opt_bytes++;
            td = data[opt_bytes + 2] >> 4;
        }
    }
    if (len < 2 + historical_length + opt_bytes) {
        DPRINTF(card, D_WARN,
            "atr too short: len %d, but historical_len %d, T1 0x%X\n",
            len, historical_length, data[1]);
        return 0;
    }
    if (len > 2 + historical_length + opt_bytes) {
        DPRINTF(card, D_WARN,
            "atr too long: len %d, but hist/opt %d/%d, T1 0x%X\n",
            len, historical_length, opt_bytes, data[1]);
        /* let it through */
    }
    DPRINTF(card, D_VERBOSE,
            "atr passes check: %d total length, %d historical, %d optional\n",
            len, historical_length, opt_bytes);

    return 1;
}

static void ccid_card_vscard_handle_message(PassthruState *card,
    VSCMsgHeader *scr_msg_header)
{
    uint8_t *data = (uint8_t *)&scr_msg_header[1];

    switch (scr_msg_header->type) {
    case VSC_ATR:
        DPRINTF(card, D_INFO, "VSC_ATR %d\n", scr_msg_header->length);
        if (scr_msg_header->length > MAX_ATR_SIZE) {
            error_report("ATR size exceeds spec, ignoring");
            ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
                                        VSC_GENERAL_ERROR);
            break;
        }
        if (!check_atr(card, data, scr_msg_header->length)) {
            error_report("ATR is inconsistent, ignoring");
            ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
                                        VSC_GENERAL_ERROR);
            break;
        }
        memcpy(card->atr, data, scr_msg_header->length);
        card->atr_length = scr_msg_header->length;
        ccid_card_card_inserted(&card->base);
        ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
                                    VSC_SUCCESS);
        break;
    case VSC_APDU:
        ccid_card_send_apdu_to_guest(
            &card->base, data, scr_msg_header->length);
        break;
    case VSC_CardRemove:
        DPRINTF(card, D_INFO, "VSC_CardRemove\n");
        ccid_card_card_removed(&card->base);
        ccid_card_vscard_send_error(card,
            scr_msg_header->reader_id, VSC_SUCCESS);
        break;
    case VSC_Init:
        ccid_card_vscard_handle_init(
            card, scr_msg_header, (VSCMsgInit *)data);
        break;
    case VSC_Error:
        ccid_card_card_error(&card->base, *(uint32_t *)data);
        break;
    case VSC_ReaderAdd:
        if (ccid_card_ccid_attach(&card->base) < 0) {
            ccid_card_vscard_send_error(card, VSCARD_UNDEFINED_READER_ID,
                                      VSC_CANNOT_ADD_MORE_READERS);
        } else {
            ccid_card_vscard_send_error(card, VSCARD_MINIMAL_READER_ID,
                                        VSC_SUCCESS);
        }
        break;
    case VSC_ReaderRemove:
        ccid_card_ccid_detach(&card->base);
        ccid_card_vscard_send_error(card,
            scr_msg_header->reader_id, VSC_SUCCESS);
        break;
    default:
        printf("usb-ccid: chardev: unexpected message of type %X\n",
               scr_msg_header->type);
        ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
            VSC_GENERAL_ERROR);
    }
}

static void ccid_card_vscard_drop_connection(PassthruState *card)
{
    qemu_chr_delete(card->cs);
    card->vscard_in_pos = card->vscard_in_hdr = 0;
}

static void ccid_card_vscard_read(void *opaque, const uint8_t *buf, int size)
{
    PassthruState *card = opaque;
    VSCMsgHeader *hdr;

    if (card->vscard_in_pos + size > VSCARD_IN_SIZE) {
        error_report(
            "no room for data: pos %d +  size %d > %d. dropping connection.",
            card->vscard_in_pos, size, VSCARD_IN_SIZE);
        ccid_card_vscard_drop_connection(card);
        return;
    }
    assert(card->vscard_in_pos < VSCARD_IN_SIZE);
    assert(card->vscard_in_hdr < VSCARD_IN_SIZE);
    memcpy(card->vscard_in_data + card->vscard_in_pos, buf, size);
    card->vscard_in_pos += size;
    hdr = (VSCMsgHeader *)(card->vscard_in_data + card->vscard_in_hdr);

    while ((card->vscard_in_pos - card->vscard_in_hdr >= sizeof(VSCMsgHeader))
         &&(card->vscard_in_pos - card->vscard_in_hdr >=
                                  sizeof(VSCMsgHeader) + ntohl(hdr->length))) {
        hdr->reader_id = ntohl(hdr->reader_id);
        hdr->length = ntohl(hdr->length);
        hdr->type = ntohl(hdr->type);
        ccid_card_vscard_handle_message(card, hdr);
        card->vscard_in_hdr += hdr->length + sizeof(VSCMsgHeader);
        hdr = (VSCMsgHeader *)(card->vscard_in_data + card->vscard_in_hdr);
    }
    if (card->vscard_in_hdr == card->vscard_in_pos) {
        card->vscard_in_pos = card->vscard_in_hdr = 0;
    }
}

static void ccid_card_vscard_event(void *opaque, int event)
{
    PassthruState *card = opaque;

    switch (event) {
    case CHR_EVENT_BREAK:
        card->vscard_in_pos = card->vscard_in_hdr = 0;
        break;
    case CHR_EVENT_FOCUS:
        break;
    case CHR_EVENT_OPENED:
        DPRINTF(card, D_INFO, "%s: CHR_EVENT_OPENED\n", __func__);
        break;
    }
}

/* End VSCard handling */

static void passthru_apdu_from_guest(
    CCIDCardState *base, const uint8_t *apdu, uint32_t len)
{
    PassthruState *card = DO_UPCAST(PassthruState, base, base);

    if (!card->cs) {
        printf("ccid-passthru: no chardev, discarding apdu length %d\n", len);
        return;
    }
    ccid_card_vscard_send_apdu(card, apdu, len);
}

static const uint8_t *passthru_get_atr(CCIDCardState *base, uint32_t *len)
{
    PassthruState *card = DO_UPCAST(PassthruState, base, base);

    *len = card->atr_length;
    return card->atr;
}

static int passthru_initfn(CCIDCardState *base)
{
    PassthruState *card = DO_UPCAST(PassthruState, base, base);

    card->vscard_in_pos = 0;
    card->vscard_in_hdr = 0;
    if (card->cs) {
        DPRINTF(card, D_INFO, "initing chardev\n");
        qemu_chr_add_handlers(card->cs,
            ccid_card_vscard_can_read,
            ccid_card_vscard_read,
            ccid_card_vscard_event, card);
        ccid_card_vscard_send_init(card);
    } else {
        error_report("missing chardev");
        return -1;
    }
    card->debug = parse_debug_env("QEMU_CCID_PASSTHRU_DEBUG", D_VERBOSE,
                                  card->debug);
    assert(sizeof(DEFAULT_ATR) <= MAX_ATR_SIZE);
    memcpy(card->atr, DEFAULT_ATR, sizeof(DEFAULT_ATR));
    card->atr_length = sizeof(DEFAULT_ATR);
    return 0;
}

static int passthru_exitfn(CCIDCardState *base)
{
    return 0;
}

static VMStateDescription passthru_vmstate = {
    .name = "ccid-card-passthru",
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_BUFFER(vscard_in_data, PassthruState),
        VMSTATE_UINT32(vscard_in_pos, PassthruState),
        VMSTATE_UINT32(vscard_in_hdr, PassthruState),
        VMSTATE_BUFFER(atr, PassthruState),
        VMSTATE_UINT8(atr_length, PassthruState),
        VMSTATE_END_OF_LIST()
    }
};

static Property passthru_card_properties[] = {
    DEFINE_PROP_CHR("chardev", PassthruState, cs),
    DEFINE_PROP_UINT8("debug", PassthruState, debug, 0),
    DEFINE_PROP_END_OF_LIST(),
};

static void passthru_class_initfn(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    CCIDCardClass *cc = CCID_CARD_CLASS(klass);

    cc->initfn = passthru_initfn;
    cc->exitfn = passthru_exitfn;
    cc->get_atr = passthru_get_atr;
    cc->apdu_from_guest = passthru_apdu_from_guest;
    set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
    dc->desc = "passthrough smartcard";
    dc->vmsd = &passthru_vmstate;
    dc->props = passthru_card_properties;
}

static const TypeInfo passthru_card_info = {
    .name          = PASSTHRU_DEV_NAME,
    .parent        = TYPE_CCID_CARD,
    .instance_size = sizeof(PassthruState),
    .class_init    = passthru_class_initfn,
};

static void ccid_card_passthru_register_types(void)
{
    type_register_static(&passthru_card_info);
}

type_init(ccid_card_passthru_register_types)
Commit	Line	Data
edbb2136 AL	1	/*
	2	* CCID Passthru Card Device emulation
	3	*
	4	* Copyright (c) 2011 Red Hat.
	5	* Written by Alon Levy.
	6	*
	7	* This work is licensed under the terms of the GNU GPL, version 2.1 or later.
	8	* See the COPYING file in the top-level directory.
	9	*/
	10
dccfcd0e	11	#include "sysemu/char.h"
d49b6836	12	#include "qemu/error-report.h"
1de7afc9	13	#include "qemu/sockets.h"
83c9089e	14	#include "monitor/monitor.h"
47b43a1f	15	#include "ccid.h"
edbb2136 AL	16	#include "libcacard/vscard_common.h"
	17
	18	#define DPRINTF(card, lvl, fmt, ...) \
	19	do { \
	20	if (lvl <= card->debug) { \
	21	printf("ccid-card-passthru: " fmt , ## __VA_ARGS__); \
	22	} \
	23	} while (0)
	24
	25	#define D_WARN 1
	26	#define D_INFO 2
	27	#define D_MORE_INFO 3
	28	#define D_VERBOSE 4
	29
	30	/* TODO: do we still need this? */
da000a48	31	static const uint8_t DEFAULT_ATR[] = {
edbb2136 AL	32	/*
	33	* From some example somewhere
	34	* 0x3B, 0xB0, 0x18, 0x00, 0xD1, 0x81, 0x05, 0xB1, 0x40, 0x38, 0x1F, 0x03, 0x28
	35	*/
	36
	37	/* From an Athena smart card */
	38	0x3B, 0xD5, 0x18, 0xFF, 0x80, 0x91, 0xFE, 0x1F, 0xC3, 0x80, 0x73, 0xC8, 0x21,
	39	0x13, 0x08
	40	};
	41
	42
	43	#define PASSTHRU_DEV_NAME "ccid-card-passthru"
	44	#define VSCARD_IN_SIZE 65536
	45
	46	/* maximum size of ATR - from 7816-3 */
	47	#define MAX_ATR_SIZE 40
	48
	49	typedef struct PassthruState PassthruState;
	50
	51	struct PassthruState {
	52	CCIDCardState base;
	53	CharDriverState *cs;
	54	uint8_t vscard_in_data[VSCARD_IN_SIZE];
	55	uint32_t vscard_in_pos;
	56	uint32_t vscard_in_hdr;
	57	uint8_t atr[MAX_ATR_SIZE];
	58	uint8_t atr_length;
	59	uint8_t debug;
	60	};
	61
	62	/*
	63	* VSCard protocol over chardev
	64	* This code should not depend on the card type.
	65	*/
	66
	67	static void ccid_card_vscard_send_msg(PassthruState *s,
	68	VSCMsgType type, uint32_t reader_id,
	69	const uint8_t *payload, uint32_t length)
	70	{
	71	VSCMsgHeader scr_msg_header;
	72
	73	scr_msg_header.type = htonl(type);
	74	scr_msg_header.reader_id = htonl(reader_id);
	75	scr_msg_header.length = htonl(length);
2cc6e0a1 AL	76	qemu_chr_fe_write(s->cs, (uint8_t *)&scr_msg_header, sizeof(VSCMsgHeader));
2cc6e0a1 AL	77	qemu_chr_fe_write(s->cs, payload, length);
edbb2136 AL	78	}
	79
	80	static void ccid_card_vscard_send_apdu(PassthruState *s,
	81	const uint8_t *apdu, uint32_t length)
	82	{
	83	ccid_card_vscard_send_msg(
	84	s, VSC_APDU, VSCARD_MINIMAL_READER_ID, apdu, length);
	85	}
	86
	87	static void ccid_card_vscard_send_error(PassthruState *s,
	88	uint32_t reader_id, VSCErrorCode code)
	89	{
	90	VSCMsgError msg = {.code = htonl(code)};
	91
	92	ccid_card_vscard_send_msg(
	93	s, VSC_Error, reader_id, (uint8_t *)&msg, sizeof(msg));
	94	}
	95
	96	static void ccid_card_vscard_send_init(PassthruState *s)
	97	{
	98	VSCMsgInit msg = {
	99	.version = htonl(VSCARD_VERSION),
	100	.magic = VSCARD_MAGIC,
	101	.capabilities = {0}
	102	};
	103
	104	ccid_card_vscard_send_msg(s, VSC_Init, VSCARD_UNDEFINED_READER_ID,
	105	(uint8_t *)&msg, sizeof(msg));
	106	}
	107
	108	static int ccid_card_vscard_can_read(void *opaque)
	109	{
	110	PassthruState *card = opaque;
	111
	112	return VSCARD_IN_SIZE >= card->vscard_in_pos ?
	113	VSCARD_IN_SIZE - card->vscard_in_pos : 0;
	114	}
	115
	116	static void ccid_card_vscard_handle_init(
	117	PassthruState card, VSCMsgHeader hdr, VSCMsgInit *init)
	118	{
	119	uint32_t *capabilities;
	120	int num_capabilities;
	121	int i;
	122
	123	capabilities = init->capabilities;
	124	num_capabilities =
	125	1 + ((hdr->length - sizeof(VSCMsgInit)) / sizeof(uint32_t));
	126	init->version = ntohl(init->version);
	127	for (i = 0 ; i < num_capabilities; ++i) {
	128	capabilities[i] = ntohl(capabilities[i]);
	129	}
	130	if (init->magic != VSCARD_MAGIC) {
	131	error_report("wrong magic");
	132	/* we can't disconnect the chardev */
	133	}
	134	if (init->version != VSCARD_VERSION) {
	135	DPRINTF(card, D_WARN,
	136	"got version %d, have %d", init->version, VSCARD_VERSION);
	137	}
	138	/* future handling of capabilities, none exist atm */
	139	ccid_card_vscard_send_init(card);
	140	}
	141
0e61400c AL	142	static int check_atr(PassthruState card, uint8_t data, int len)
	143	{
	144	int historical_length, opt_bytes;
	145	int td_count = 0;
	146	int td;
	147
	148	if (len < 2) {
	149	return 0;
	150	}
	151	historical_length = data[1] & 0xf;
	152	opt_bytes = 0;
	153	if (data[0] != 0x3b && data[0] != 0x3f) {
	154	DPRINTF(card, D_WARN, "atr's T0 is 0x%X, not in {0x3b, 0x3f}\n",
	155	data[0]);
	156	return 0;
	157	}
	158	td_count = 0;
	159	td = data[1] >> 4;
	160	while (td && td_count < 2 && opt_bytes + historical_length + 2 < len) {
	161	td_count++;
	162	if (td & 0x1) {
	163	opt_bytes++;
	164	}
	165	if (td & 0x2) {
	166	opt_bytes++;
	167	}
	168	if (td & 0x4) {
	169	opt_bytes++;
	170	}
	171	if (td & 0x8) {
	172	opt_bytes++;
	173	td = data[opt_bytes + 2] >> 4;
	174	}
	175	}
	176	if (len < 2 + historical_length + opt_bytes) {
	177	DPRINTF(card, D_WARN,
	178	"atr too short: len %d, but historical_len %d, T1 0x%X\n",
	179	len, historical_length, data[1]);
	180	return 0;
	181	}
	182	if (len > 2 + historical_length + opt_bytes) {
	183	DPRINTF(card, D_WARN,
	184	"atr too long: len %d, but hist/opt %d/%d, T1 0x%X\n",
	185	len, historical_length, opt_bytes, data[1]);
	186	/* let it through */
	187	}
	188	DPRINTF(card, D_VERBOSE,
	189	"atr passes check: %d total length, %d historical, %d optional\n",
	190	len, historical_length, opt_bytes);
	191
	192	return 1;
	193	}
	194
edbb2136 AL	195	static void ccid_card_vscard_handle_message(PassthruState *card,
	196	VSCMsgHeader *scr_msg_header)
	197	{
	198	uint8_t data = (uint8_t )&scr_msg_header[1];
	199
	200	switch (scr_msg_header->type) {
	201	case VSC_ATR:
	202	DPRINTF(card, D_INFO, "VSC_ATR %d\n", scr_msg_header->length);
	203	if (scr_msg_header->length > MAX_ATR_SIZE) {
	204	error_report("ATR size exceeds spec, ignoring");
	205	ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
	206	VSC_GENERAL_ERROR);
7e62255a	207	break;
edbb2136	208	}
0e61400c AL	209	if (!check_atr(card, data, scr_msg_header->length)) {
	210	error_report("ATR is inconsistent, ignoring");
	211	ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
	212	VSC_GENERAL_ERROR);
	213	break;
	214	}
edbb2136 AL	215	memcpy(card->atr, data, scr_msg_header->length);
	216	card->atr_length = scr_msg_header->length;
	217	ccid_card_card_inserted(&card->base);
	218	ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
	219	VSC_SUCCESS);
	220	break;
	221	case VSC_APDU:
	222	ccid_card_send_apdu_to_guest(
	223	&card->base, data, scr_msg_header->length);
	224	break;
	225	case VSC_CardRemove:
	226	DPRINTF(card, D_INFO, "VSC_CardRemove\n");
	227	ccid_card_card_removed(&card->base);
	228	ccid_card_vscard_send_error(card,
	229	scr_msg_header->reader_id, VSC_SUCCESS);
	230	break;
	231	case VSC_Init:
	232	ccid_card_vscard_handle_init(
	233	card, scr_msg_header, (VSCMsgInit *)data);
	234	break;
	235	case VSC_Error:
	236	ccid_card_card_error(&card->base, (uint32_t )data);
	237	break;
	238	case VSC_ReaderAdd:
	239	if (ccid_card_ccid_attach(&card->base) < 0) {
	240	ccid_card_vscard_send_error(card, VSCARD_UNDEFINED_READER_ID,
	241	VSC_CANNOT_ADD_MORE_READERS);
	242	} else {
	243	ccid_card_vscard_send_error(card, VSCARD_MINIMAL_READER_ID,
	244	VSC_SUCCESS);
	245	}
	246	break;
	247	case VSC_ReaderRemove:
	248	ccid_card_ccid_detach(&card->base);
	249	ccid_card_vscard_send_error(card,
	250	scr_msg_header->reader_id, VSC_SUCCESS);
	251	break;
	252	default:
	253	printf("usb-ccid: chardev: unexpected message of type %X\n",
	254	scr_msg_header->type);
	255	ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
	256	VSC_GENERAL_ERROR);
	257	}
	258	}
	259
	260	static void ccid_card_vscard_drop_connection(PassthruState *card)
	261	{
70f24fb6	262	qemu_chr_delete(card->cs);
edbb2136 AL	263	card->vscard_in_pos = card->vscard_in_hdr = 0;
	264	}
	265
	266	static void ccid_card_vscard_read(void opaque, const uint8_t buf, int size)
	267	{
	268	PassthruState *card = opaque;
	269	VSCMsgHeader *hdr;
	270
	271	if (card->vscard_in_pos + size > VSCARD_IN_SIZE) {
	272	error_report(
	273	"no room for data: pos %d + size %d > %d. dropping connection.",
	274	card->vscard_in_pos, size, VSCARD_IN_SIZE);
	275	ccid_card_vscard_drop_connection(card);
	276	return;
	277	}
	278	assert(card->vscard_in_pos < VSCARD_IN_SIZE);
	279	assert(card->vscard_in_hdr < VSCARD_IN_SIZE);
	280	memcpy(card->vscard_in_data + card->vscard_in_pos, buf, size);
	281	card->vscard_in_pos += size;
	282	hdr = (VSCMsgHeader *)(card->vscard_in_data + card->vscard_in_hdr);
	283
	284	while ((card->vscard_in_pos - card->vscard_in_hdr >= sizeof(VSCMsgHeader))
	285	&&(card->vscard_in_pos - card->vscard_in_hdr >=
	286	sizeof(VSCMsgHeader) + ntohl(hdr->length))) {
	287	hdr->reader_id = ntohl(hdr->reader_id);
	288	hdr->length = ntohl(hdr->length);
	289	hdr->type = ntohl(hdr->type);
	290	ccid_card_vscard_handle_message(card, hdr);
	291	card->vscard_in_hdr += hdr->length + sizeof(VSCMsgHeader);
	292	hdr = (VSCMsgHeader *)(card->vscard_in_data + card->vscard_in_hdr);
	293	}
	294	if (card->vscard_in_hdr == card->vscard_in_pos) {
	295	card->vscard_in_pos = card->vscard_in_hdr = 0;
	296	}
	297	}
	298
	299	static void ccid_card_vscard_event(void *opaque, int event)
	300	{
	301	PassthruState *card = opaque;
	302
	303	switch (event) {
	304	case CHR_EVENT_BREAK:
	305	card->vscard_in_pos = card->vscard_in_hdr = 0;
	306	break;
	307	case CHR_EVENT_FOCUS:
	308	break;
	309	case CHR_EVENT_OPENED:
	310	DPRINTF(card, D_INFO, "%s: CHR_EVENT_OPENED\n", __func__);
	311	break;
	312	}
	313	}
	314
	315	/* End VSCard handling */
	316
	317	static void passthru_apdu_from_guest(
	318	CCIDCardState base, const uint8_t apdu, uint32_t len)
	319	{
	320	PassthruState *card = DO_UPCAST(PassthruState, base, base);
	321
	322	if (!card->cs) {
	323	printf("ccid-passthru: no chardev, discarding apdu length %d\n", len);
	324	return;
	325	}
	326	ccid_card_vscard_send_apdu(card, apdu, len);
327	}
328
329	static const uint8_t passthru_get_atr(CCIDCardState base, uint32_t *len)
330	{
331	PassthruState *card = DO_UPCAST(PassthruState, base, base);
332
333	*len = card->atr_length;
334	return card->atr;
335	}
336
337	static int passthru_initfn(CCIDCardState *base)
338	{
339	PassthruState *card = DO_UPCAST(PassthruState, base, base);
340
341	card->vscard_in_pos = 0;
342	card->vscard_in_hdr = 0;
343	if (card->cs) {
344	DPRINTF(card, D_INFO, "initing chardev\n");
345	qemu_chr_add_handlers(card->cs,
346	ccid_card_vscard_can_read,
347	ccid_card_vscard_read,
348	ccid_card_vscard_event, card);
349	ccid_card_vscard_send_init(card);
350	} else {
351	error_report("missing chardev");
352	return -1;
353	}
b16352ac AL	354	card->debug = parse_debug_env("QEMU_CCID_PASSTHRU_DEBUG", D_VERBOSE,
b16352ac AL	355	card->debug);
edbb2136 AL	356	assert(sizeof(DEFAULT_ATR) <= MAX_ATR_SIZE);
	357	memcpy(card->atr, DEFAULT_ATR, sizeof(DEFAULT_ATR));
	358	card->atr_length = sizeof(DEFAULT_ATR);
	359	return 0;
	360	}
	361
	362	static int passthru_exitfn(CCIDCardState *base)
	363	{
	364	return 0;
	365	}
	366
	367	static VMStateDescription passthru_vmstate = {
6783ecf1	368	.name = "ccid-card-passthru",
edbb2136 AL	369	.version_id = 1,
	370	.minimum_version_id = 1,
	371	.fields = (VMStateField[]) {
	372	VMSTATE_BUFFER(vscard_in_data, PassthruState),
	373	VMSTATE_UINT32(vscard_in_pos, PassthruState),
	374	VMSTATE_UINT32(vscard_in_hdr, PassthruState),
	375	VMSTATE_BUFFER(atr, PassthruState),
	376	VMSTATE_UINT8(atr_length, PassthruState),
	377	VMSTATE_END_OF_LIST()
	378	}
	379	};
	380
39bffca2 AL	381	static Property passthru_card_properties[] = {
	382	DEFINE_PROP_CHR("chardev", PassthruState, cs),
	383	DEFINE_PROP_UINT8("debug", PassthruState, debug, 0),
	384	DEFINE_PROP_END_OF_LIST(),
	385	};
	386
ba7c0520 AL	387	static void passthru_class_initfn(ObjectClass klass, void data)
ba7c0520 AL	388	{
39bffca2	389	DeviceClass *dc = DEVICE_CLASS(klass);
ba7c0520 AL	390	CCIDCardClass *cc = CCID_CARD_CLASS(klass);
	391
	392	cc->initfn = passthru_initfn;
	393	cc->exitfn = passthru_exitfn;
	394	cc->get_atr = passthru_get_atr;
	395	cc->apdu_from_guest = passthru_apdu_from_guest;
125ee0ed	396	set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
39bffca2 AL	397	dc->desc = "passthrough smartcard";
	398	dc->vmsd = &passthru_vmstate;
	399	dc->props = passthru_card_properties;
ba7c0520 AL	400	}
ba7c0520 AL	401
8c43a6f0	402	static const TypeInfo passthru_card_info = {
39bffca2 AL	403	.name = PASSTHRU_DEV_NAME,
	404	.parent = TYPE_CCID_CARD,
	405	.instance_size = sizeof(PassthruState),
	406	.class_init = passthru_class_initfn,
edbb2136 AL	407	};
edbb2136 AL	408
83f7d43a	409	static void ccid_card_passthru_register_types(void)
edbb2136	410	{
39bffca2	411	type_register_static(&passthru_card_info);
edbb2136 AL	412	}
edbb2136 AL	413
83f7d43a	414	type_init(ccid_card_passthru_register_types)